Simplify

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

diff --git a/app/assets/javascripts/router.js b/app/assets/javascripts/router.js
index 654ec860b549b2483d2a8fea51a46edc9bc5eec7..5b9cdad07141515c883065671bef73c602a8ea06 100644 (file)
--- a/app/assets/javascripts/router.js
+++ b/app/assets/javascripts/router.js
@@ -1,4 +1,4 @@
-OSM.Router = function(rts) {
+OSM.Router = function(map, rts) {
   var escapeRegExp  = /[\-{}\[\]+?.,\\\^$|#\s]/g;
   var optionalParam = /\((.*?)\)/g;
   var namedParam    = /(\(\?)?:\w+/g;
@@ -45,25 +45,60 @@ OSM.Router = function(rts) {
   };
 
   var currentPath = window.location.pathname + window.location.search,
-    currentRoute = routes.recognize(currentPath);
+    currentRoute = routes.recognize(currentPath),
+    currentHash = location.hash || OSM.formatHash(map);
 
   currentRoute.run('load', currentPath);
 
+  var stateChange;
+
+  map.on('moveend baselayerchange overlaylayerchange', function() {
+    var hash = OSM.formatHash(map);
+    if (hash === currentHash) return;
+    currentHash = hash;
+    stateChange(OSM.parseHash(hash), hash);
+  });
+
+  $(window).on('hashchange', function() {
+    var hash = location.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);
+    stateChange(state, hash);
+  });
+
   if (window.history && window.history.pushState) {
-    $(window).on('popstate', function() {
+    stateChange = function(state, hash) {
+      window.history.replaceState(state, document.title, hash);
+    };
+
+    // Set a non-null initial state, so that the e.originalEvent.state
+    // check below works correctly when going back to the initial page.
+    stateChange(OSM.parseHash(currentHash), currentPath + currentHash);
+
+    $(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;
       if (path === currentPath) return;
       currentRoute.run('unload');
       currentPath = path;
       currentRoute = routes.recognize(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);
+      }
     });
 
     return function (url) {
       var path = url.replace(/#.*/, ''),
         route = routes.recognize(path);
       if (!route) return false;
-      window.history.pushState({}, document.title, url);
+      window.history.pushState(OSM.parseHash(url) || {}, document.title, url);
       currentRoute.run('unload');
       currentPath = path;
       currentRoute = route;
@@ -71,6 +106,10 @@ OSM.Router = function(rts) {
       return true;
     }
   } else {
+    stateChange = function(state, hash) {
+      window.location.replace(hash);
+    };
+
     return function (url) {
       window.location.assign(url);
     }