Extends Leaflet-fullhash properly

js/plugin/Hash.js

@@ -0,0 +1,65 @@
+BR.Hash = L.hash.extend({
+
+    formatHash: function(map) {
+        var center = map.getCenter(),
+            zoom = map.getZoom(),
+            precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2)),
+            layers = [];
+
+        //console.log(this.options);
+        var options = this.options;
+        //Check active layers
+        for(var key in options) {
+            if (options.hasOwnProperty(key)) {
+                if (map.hasLayer(options[key])) {
+                    layers.push(key);
+                };
+            };
+        };
+
+        var url = "#" + [zoom,
+            center.lat.toFixed(precision),
+            center.lng.toFixed(precision),
+            layers.join("-")
+        ].join("/");
+
+        if (this.additionalCb != null) {
+            var additional = this.additionalCb();
+            if (additional != null) {
+                url += additional;
+            }
+        }
+
+        return url;
+    },
+
+    update: function() {
+        var hash = location.hash;
+        if (hash === this.lastHash) {
+            return;
+        }
+        var parsed = this.parseHash(hash);
+        if (parsed) {
+            this.movingMap = true;
+
+            this.map.setView(parsed.center, parsed.zoom);
+            var layers = parsed.layers,
+                options = this.options,
+                that = this;
+            //Add/remove layers
+            this.map.eachLayer(function(layer) {
+                that.map.removeLayer(layer);
+            });
+
+            layers.forEach(function(element, index, array) {
+                //console.log(options[element]);
+                that.map.addLayer(options[element]);
+            });
+
+            this.movingMap = false;
+        } else {
+            this.onMapMove(this.map);
+        }
+    },
+
+});