X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/bf797f438037c800673df8314449e118c31e0d73..1f22b625a045b7ce25a4668f404071aef8ab8b09:/app/assets/javascripts/osm.js.erb

diff --git a/app/assets/javascripts/osm.js.erb b/app/assets/javascripts/osm.js.erb
index 382e32bdf..bd65182a7 100644
--- a/app/assets/javascripts/osm.js.erb
+++ b/app/assets/javascripts/osm.js.erb
@@ -165,7 +165,12 @@ OSM = {
     return hash;
   },
 
-  zoomPrecision: function (zoom) {
+  zoomPrecision: function(zoom) {
     return Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+  },
+
+  locationCookie: function(map) {
+    var center = map.getCenter().wrap();
+    return [center.lng, center.lat, map.getZoom(), map.getLayersCode()].join('|');
   }
 };