L.extend(L.LatLngBounds.prototype, {
  getSize: function () {
    return (this._northEast.lat - this._southWest.lat) *
           (this._northEast.lng - this._southWest.lng);
  },

  wrap: function () {
    return new L.LatLngBounds(this._southWest.wrap(), this._northEast.wrap());
  }
});

L.extend(L.Map.prototype, {
    getLayersCode: function() {
        var layerConfig = '';
        for (var i in this._layers) { // TODO: map.eachLayer
            var layer = this._layers[i];
            if (layer.options && layer.options.code) {
                layerConfig += layer.options.code;
            }
        }
        return layerConfig;
    },
    getMapBaseLayerId: function() {
        for (var i in this._layers) { // TODO: map.eachLayer
            var layer = this._layers[i];
            if (layer.options && layer.options.keyid) return layer.options.keyid;
        }
    }
});

L.Icon.Default.imagePath = <%= "#{asset_prefix}/images".to_json %>;