-function updatelinks(lon,lat,zoom,layers) {
+/*
+ * Called as the user scrolls/zooms around to aniplate hrefs of the
+ * view tab and various other links
+ */
+function updatelinks(lon,lat,zoom,layers,minlon,minlat,maxlon,maxlat,objtype,objid) {
+ var decimals = Math.pow(10, Math.floor(zoom/3));
var node;
- node = document.getElementById("viewanchor");
- if (node) {
- var args = getArgs(node.href);
- args["lat"] = lat;
- args["lon"] = lon;
- args["zoom"] = zoom;
- args["layers"] = layers;
- node.href = setArgs(node.href, args);
+ lat = Math.round(lat * decimals) / decimals;
+ lon = Math.round(lon * decimals) / decimals;
+
+ if (minlon) {
+ minlon = Math.round(minlon * decimals) / decimals;
+ minlat = Math.round(minlat * decimals) / decimals;
+ maxlon = Math.round(maxlon * decimals) / decimals;
+ maxlat = Math.round(maxlat * decimals) / decimals;
}
- node = document.getElementById("editanchor");
- if (node) {
- if (zoom >= 11) {
- var args = new Object();
+ $$(".geolink").each(function (link) {
+ var args = getArgs(link.href);
+
+ if (link.hasClassName("llz")) {
args.lat = lat;
args.lon = lon;
args.zoom = zoom;
- node.href = setArgs("/edit.html", args);
- node.style.fontStyle = 'normal';
+ } else if (minlon && link.hasClassName("bbox")) {
+ args.bbox = minlon + "," + minlat + "," + maxlon + "," + maxlat;
+ }
+
+ if (layers && link.hasClassName("layers")) {
+ args.layers = layers;
+ }
+
+ if (objtype && link.hasClassName("object")) {
+ args[objtype] = objid;
+ }
+
+ if (link.hasClassName("minzoom[0-9]+")) {
+ $w(link.className).each(function (classname) {
+ if (match = classname.match(/^minzoom([0-9]+)$/)) {
+ var minzoom = match[1];
+ var name = link.id.replace(/anchor$/, "");
+
+ if (zoom >= minzoom) {
+ link.onclick = null;
+ link.title = i18n("javascripts.site." + name + "_tooltip");
+ link.removeClassName("disabled");
+ } else {
+ link.onclick = function () { alert(i18n("javascripts.site." + name + "_zoom_alert")); return false; };
+ link.title = i18n("javascripts.site." + name + "_disabled_tooltip");
+ link.addClassName("disabled");
+ }
+ }
+ });
+ }
+
+ link.href = setArgs(link.href, args);
+ });
+
+ node = $("shortlinkanchor");
+ if (node) {
+ var args = getArgs(node.href);
+ var code = makeShortCode(lat, lon, zoom);
+ var prefix = shortlinkPrefix();
+
+ // Add ?{node,way,relation}=id to the arguments
+ if (objtype && objid) {
+ args[objtype] = objid;
+ }
+
+ // This is a hack to omit the default mapnik layer from the shortlink.
+ if (layers && layers != "M") {
+ args["layers"] = layers;
+ }
+ else {
+ delete args["layers"];
+ }
+
+ // Here we're assuming that all parameters but ?layers= and
+ // ?{node,way,relation}= can be safely omitted from the shortlink
+ // which encodes lat/lon/zoom. If new URL parameters are added to
+ // the main slippy map this needs to be changed.
+ if (args["layers"] || args[objtype]) {
+ node.href = setArgs(prefix + "/go/" + code, args);
} else {
- node.href = 'javascript:alert("zoom in to edit map");';
- node.style.fontStyle = 'italic';
+ node.href = prefix + "/go/" + code;
}
}
}
+/*
+ * Get the URL prefix to use for a short link
+ */
+function shortlinkPrefix() {
+ if (window.location.hostname.match(/^www\.openstreetmap\.org/i)) {
+ return "http://osm.org";
+ } else {
+ return "";
+ }
+}
+
+/*
+ * Called to get the arguments from a URL as a hash.
+ */
function getArgs(url) {
var args = new Object();
var querystart = url.indexOf("?");
return args;
}
+/*
+ * Called to set the arguments on a URL from the given hash.
+ */
function setArgs(url, args) {
var queryitems = new Array();
return url.replace(/\?.*$/, "") + "?" + queryitems.join("&");
}
+/*
+ * Called to get a CSS property for an element.
+ */
function getStyle(el, property) {
var style;
return style;
}
+
+/*
+ * Called to interpolate JavaScript variables in strings using a
+ * similar syntax to rails I18n string interpolation - the only
+ * difference is that [[foo]] is the placeholder syntax instead
+ * of {{foo}} which allows the same string to be processed by both
+ * rails and then later by javascript.
+ */
+function i18n(string, keys) {
+ string = i18n_strings[string] || string
+
+ for (var key in keys) {
+ var re_key = '\\[\\[' + key + '\\]\\]';
+ var re = new RegExp(re_key, "g");
+
+ string = string.replace(re, keys[key]);
+ }
+
+ return string;
+}
+
+/*
+ * Called to interlace the bits in x and y, making a Morton code.
+ */
+function interlace(x, y) {
+ x = (x | (x << 8)) & 0x00ff00ff;
+ x = (x | (x << 4)) & 0x0f0f0f0f;
+ x = (x | (x << 2)) & 0x33333333;
+ x = (x | (x << 1)) & 0x55555555;
+
+ y = (y | (y << 8)) & 0x00ff00ff;
+ y = (y | (y << 4)) & 0x0f0f0f0f;
+ y = (y | (y << 2)) & 0x33333333;
+ y = (y | (y << 1)) & 0x55555555;
+
+ return (x << 1) | y;
+}
+
+/*
+ * Called to create a short code for the short link.
+ */
+function makeShortCode(lat, lon, zoom) {
+ char_array = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_@";
+ var x = Math.round((lon + 180.0) * ((1 << 30) / 90.0));
+ var y = Math.round((lat + 90.0) * ((1 << 30) / 45.0));
+ // JavaScript only has to keep 32 bits of bitwise operators, so this has to be
+ // done in two parts. each of the parts c1/c2 has 30 bits of the total in it
+ // and drops the last 4 bits of the full 64 bit Morton code.
+ var str = "";
+ var c1 = interlace(x >>> 17, y >>> 17), c2 = interlace((x >>> 2) & 0x7fff, (y >>> 2) & 0x7fff);
+ for (var i = 0; i < Math.ceil((zoom + 8) / 3.0) && i < 5; ++i) {
+ digit = (c1 >> (24 - 6 * i)) & 0x3f;
+ str += char_array.charAt(digit);
+ }
+ for (var i = 5; i < Math.ceil((zoom + 8) / 3.0); ++i) {
+ digit = (c2 >> (24 - 6 * (i - 5))) & 0x3f;
+ str += char_array.charAt(digit);
+ }
+ for (var i = 0; i < ((zoom + 8) % 3); ++i) {
+ str += "-";
+ }
+ return str;
+}
projects / rails.git / blobdiff