Merge f6f4b65 into 7f97fa0

build/deps.js

@@ -61,6 +61,7 @@ var deps = {
             'DGCustomization/src/DGCustomization.js',
             'DGCustomization/src/DGMap.js',
             'DGCustomization/src/DGMap.BaseLayer.js',
+            'DGCustomization/src/DGMap.TilesCheck.js',
             'DGCustomization/src/DGPopup.js',
             'DGCustomization/src/DGZoom.js',
             'DGCustomization/lang/DGZoom/ru.js',

src/DGCustomization/src/DGMap.TilesCheck.js

@@ -0,0 +1,58 @@
+DG.Map.mergeOptions({
+    tilesCheck: true
+});
+
+DG.Map.TilesCheck = DG.Handler.extend({
+    initialize: function (map) {
+        this._map = map;
+        this._layer = map.baseLayer;
+
+        this._tileLoadArray = [];
+    },
+
+    addHooks: function () {
+        this._map.on(this._mapEvents, this);
+        this._layer.on(this._layerEvents, this);
+    },
+
+    removeHooks: function () {
+        this._map.off(this._mapEvents, this);
+        this._layer.off(this._layerEvents, this);
+    },
+
+    _mapEvents: {
+        layeradd: function (e) {
+            if (e.layer == this._layer) {
+                this.enable();
+            }
+        },
+        layerremove: function (e) {
+            if (e.layer == this._layer) {
+                this.disable();
+            }
+        }
+    },
+
+    _layerEvents: {
+        loading: function () {
+            this._tileLoadArray = [];
+        },
+        tileload: function (obj) {
+            this._tileLoadArray.push(obj.tile);
+        },
+        load: function () {
+            if (this._map._tileLayersNumber !== 0) { return; }
+
+            var errorUrl = this._layer.options.errorTileUrl;
+            var isSuccess = this._tileLoadArray.some(function (tile) {
+                return tile.src !== errorUrl;
+            });
+
+            if (!isSuccess) {
+                this._map.zoomOut();
+            }
+        }
+    }
+});
+
+DG.Map.addInitHook('addHandler', 'tilesCheck', DG.Map.TilesCheck);