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[rails.git] / app / assets / javascripts / router.js

diff --git a/app/assets/javascripts/router.js b/app/assets/javascripts/router.js
index cbd41889590b32114b9f8134511687278339ee90..0f37e32f1747107a06dd22d76fa2464b9a441484 100644 (file)
--- a/app/assets/javascripts/router.js
+++ b/app/assets/javascripts/router.js
@@ -1,3 +1,51 @@
+/*
+  OSM.Router implements pushState-based navigation for the main page and
+  other pages that use a sidebar+map based layout (export, search results,
+  history, and browse pages).
+
+  For browsers without pushState, it falls back to full page loads, which all
+  of the above pages support.
+
+  The router is initialized with a set of routes: a mapping of URL path templates
+  to route controller objects. Path templates can contain placeholders
+  (`/note/:id`) and optional segments (`/:type/:id(/history)`).
+
+  Route controller objects can define four methods that are called at defined
+  times during routing:
+
+     * The `load` method is called by the router when a path which matches the
+       route's path template is loaded via a normal full page load. It is passed
+       as arguments the URL path plus any matching arguments for placeholders
+       in the path template.
+
+     * The `pushstate` method is called when a page which matches the route's path
+       template is loaded via pushState. It is passed the same arguments as `load`.
+
+     * The `popstate` method is called when returning to a previously
+       pushState-loaded page via popstate (i.e. browser back/forward buttons).
+
+     * The `unload` method is called on the exiting route controller when navigating
+       via pushState or popstate to another route.
+
+   Note that while `load` is not called by the router for pushState-based loads,
+   it's frequently useful for route controllers to call it manually inside their
+   definition of the `pushstate` and `popstate` methods.
+
+   An instance of OSM.Router is assigned to `OSM.router`. To navigate to a new page
+   via pushState (with automatic full-page load fallback), call `OSM.router.route`:
+
+       OSM.router.route('/way/1234');
+
+   If `route` is passed a path that matches one of the path templates, it performs
+   the appropriate actions and returns true. Otherwise it returns false.
+
+   OSM.Router also handles updating the hash portion of the URL containing transient
+   map state such as the position and zoom level. Some route controllers may wish to
+   temporarily suppress updating the hash (for example, to omit the hash on pages
+   such as `/way/1234` unless the map is moved). This can be done by using
+   `OSM.router.withoutMoveListener` to run a block of code that may update
+   move the map without the hash changing.
+ */

 OSM.Router = function(map, rts) {
   var escapeRegExp  = /[\-{}\[\]+?.,\\\^$|#\s]/g;
   var optionalParam = /\((.*?)\)/g;
 OSM.Router = function(map, rts) {
   var escapeRegExp  = /[\-{}\[\]+?.,\\\^$|#\s]/g;
   var optionalParam = /\((.*?)\)/g;


@@ -28,6 +76,8 @@ OSM.Router = function(map, rts) {
         });
       }
 
         });
       }
 

+      params = params.concat(Array.prototype.slice.call(arguments, 2));
+

       return (controller[action] || $.noop).apply(controller, params);
     };
 
       return (controller[action] || $.noop).apply(controller, params);
     };
 


@@ -36,7 +86,7 @@ OSM.Router = function(map, rts) {
 
   var routes = [];
   for (var r in rts)
 
   var routes = [];
   for (var r in rts)

-    routes.push(Route(r, rts[r]));
+    routes.push(new Route(r, rts[r]));

 
   routes.recognize = function(path) {
     for (var i = 0; i < this.length; i++) {
 
   routes.recognize = function(path) {
     for (var i = 0; i < this.length; i++) {


@@ -44,40 +94,43 @@ OSM.Router = function(map, rts) {
     }
   };
 
     }
   };
 

-  var currentPath = window.location.pathname + window.location.search,
+  var currentPath = window.location.pathname.replace(/(.)\/$/, '$1') + window.location.search,

     currentRoute = routes.recognize(currentPath),
     currentHash = location.hash || OSM.formatHash(map);
 
     currentRoute = routes.recognize(currentPath),
     currentHash = location.hash || OSM.formatHash(map);
 

-  var router, stateChange;
+  var router = {};

 
   if (window.history && window.history.pushState) {
     $(window).on('popstate', function(e) {
       if (!e.originalEvent.state) return; // Is it a real popstate event or just a hash change?
 
   if (window.history && window.history.pushState) {
     $(window).on('popstate', function(e) {
       if (!e.originalEvent.state) return; // Is it a real popstate event or just a hash change?

-      var path = window.location.pathname + window.location.search;
+      var path = window.location.pathname + window.location.search,
+        route = routes.recognize(path);

       if (path === currentPath) return;
       if (path === currentPath) return;

-      currentRoute.run('unload');
+      currentRoute.run('unload', null, route === currentRoute);

       currentPath = path;
       currentPath = path;

-      currentRoute = routes.recognize(currentPath);
+      currentRoute = route;

       currentRoute.run('popstate', currentPath);
       currentRoute.run('popstate', currentPath);

-      var state = e.originalEvent.state;
-      if (state.center) {
-        map.setView(state.center, state.zoom, {animate: false});
-        map.updateLayers(state.layers);
-      }
+      map.setState(e.originalEvent.state, {animate: false});

     });
 
     });
 

-    router = function (url) {
+    router.route = function (url) {

       var path = url.replace(/#.*/, ''),
         route = routes.recognize(path);
       if (!route) return false;
       var path = url.replace(/#.*/, ''),
         route = routes.recognize(path);
       if (!route) return false;

-      window.history.pushState(OSM.parseHash(url) || {}, document.title, url);
-      currentRoute.run('unload');
+      currentRoute.run('unload', null, route === currentRoute);
+      var state = OSM.parseHash(url);
+      map.setState(state);
+      window.history.pushState(state, document.title, url);

       currentPath = path;
       currentRoute = route;
       currentRoute.run('pushstate', currentPath);
       return true;
     };
 
       currentPath = path;
       currentRoute = route;
       currentRoute.run('pushstate', currentPath);
       return true;
     };
 

+    router.replace = function (url) {
+      window.history.replaceState(OSM.parseHash(url), document.title, url);
+    };
+

     router.stateChange = function(state) {
       if (state.center) {
         window.history.replaceState(state, document.title, OSM.formatHash(state));
     router.stateChange = function(state) {
       if (state.center) {
         window.history.replaceState(state, document.title, OSM.formatHash(state));


@@ -86,7 +139,7 @@ OSM.Router = function(map, rts) {
       }
     };
   } else {
       }
     };
   } else {

-    router = function (url) {
+    router.route = router.replace = function (url) {

       window.location.assign(url);
     };
 
       window.location.assign(url);
     };
 


@@ -107,18 +160,21 @@ OSM.Router = function(map, rts) {
     if (hash === currentHash) return;
     currentHash = hash;
     var state = OSM.parseHash(hash);
     if (hash === currentHash) return;
     currentHash = hash;
     var state = OSM.parseHash(hash);

-    if (!state) return;
-    map.setView(state.center, state.zoom);
-    map.updateLayers(state.layers);
+    map.setState(state);

     router.stateChange(state, hash);
   };
 
     router.stateChange(state, hash);
   };
 

-  router.moveListenerOn = function() {
-    map.on('moveend', router.updateHash);
-  };
+  router.withoutMoveListener = function (callback) {
+    function disableMoveListener() {
+      map.off('moveend', router.updateHash);
+      map.once('moveend', function () {
+        map.on('moveend', router.updateHash);
+      });
+    }

 
 

-  router.moveListenerOff = function() {
-    map.off('moveend', router.updateHash);
+    map.once('movestart', disableMoveListener);
+    callback();
+    map.off('movestart', disableMoveListener);

   };
 
   router.load = function() {
   };
 
   router.load = function() {


@@ -126,6 +182,11 @@ OSM.Router = function(map, rts) {
     router.stateChange(loadState || {});
   };
 
     router.stateChange(loadState || {});
   };
 

+  router.setCurrentPath = function (path) {
+    currentPath = path;
+    currentRoute = routes.recognize(currentPath);
+  };
+

   map.on('moveend baselayerchange overlaylayerchange', router.updateHash);
   $(window).on('hashchange', router.hashUpdated);
 
   map.on('moveend baselayerchange overlaylayerchange', router.updateHash);
   $(window).on('hashchange', router.hashUpdated);