fix potential memory leak, closes #107

CHANGELOG.md

@@ -40,6 +40,7 @@ Leaflet Changelog
  * Fixed a bug where map div with `position: absolute` is reset to `relative`. [#100](https://github.com/CloudMade/Leaflet/issues/100) 
  * Fixed a bug that caused an error when trying to add a marker without shadow in its icon.
  * Fixed a bug where popup content would not update on `setContent` call. [#94](https://github.com/CloudMade/Leaflet/issues/94)
+ * Fixed memory leak in webkit when unloading tiles, thanks to [@Scalar4eg](https://github.com/Scalar4eg). [#107](https://github.com/CloudMade/Leaflet/issues/107)
  * Fixed incorrect zoom animation & popup styling in Opera 11.11.
  * Fixed a bug where double click zoom wouldn't work if popup is opened on map click
  * Fixed a bug with click propagation on popup close button. [#99](https://github.com/CloudMade/Leaflet/issues/99)

dist/leaflet.js

@@ -38,10 +38,10 @@ g=Math.PI/2-2*Math.atan(d),h=15,j=0.1;Math.abs(j)>1.0E-7&&--h>0;)j=f*Math.sin(g)
 this._reset,this);if(this.options.updateWhenIdle)a.on("moveend",this._update,this);else this._limitedUpdate=L.Util.limitExecByInterval(this._update,100,this),a.on("move",this._limitedUpdate,this);this._reset();this._update()},onRemove:function(){this._map.getPanes().tilePane.removeChild(this._container);this._container=null;this._map.off("viewreset",this._reset,this);this.options.updateWhenIdle?this._map.off("moveend",this._update,this):this._map.off("move",this._limitedUpdate,this)},getAttribution:function(){return this.options.attribution},
 setOpacity:function(a){this.options.opacity=a;this._setOpacity(a);if(L.Browser.webkit)for(i in this._tiles)this._tiles[i].style.webkitTransform+=" translate(0,0)"},_setOpacity:function(a){a<1&&L.DomUtil.setOpacity(this._container,a)},_initContainer:function(){var a=this._map.getPanes().tilePane;if(!this._container||a.empty)this._container=L.DomUtil.create("div","leaflet-layer",a),this._setOpacity(this.options.opacity)},_reset:function(){this._tiles={};this._initContainer();this._container.innerHTML=
 ""},_update:function(){var a=this._map.getPixelBounds(),b=this.options.tileSize,c=new L.Point(Math.floor(a.min.x/b),Math.floor(a.min.y/b)),a=new L.Point(Math.floor(a.max.x/b),Math.floor(a.max.y/b)),c=new L.Bounds(c,a);this._addTilesFromCenterOut(c);this.options.unloadInvisibleTiles&&this._removeOtherTiles(c)},_addTilesFromCenterOut:function(a){for(var b=[],c=a.getCenter(),d=a.min.y;d<=a.max.y;d++)for(var e=a.min.x;e<=a.max.x;e++)e+":"+d in this._tiles||b.push(new L.Point(e,d));b.sort(function(a,b){return a.distanceTo(c)-
-b.distanceTo(c)});this._tilesToLoad=b.length;a=0;for(d=this._tilesToLoad;a<d;a++)this._addTile(b[a])},_removeOtherTiles:function(a){var b,c,d;for(d in this._tiles)if(this._tiles.hasOwnProperty(d)&&(b=d.split(":"),c=parseInt(b[0],10),b=parseInt(b[1],10),c<a.min.x||c>a.max.x||b<a.min.y||b>a.max.y))this._tiles[d].parentNode==this._container&&this._container.removeChild(this._tiles[d]),delete this._tiles[d]},_addTile:function(a){var b=this._getTilePos(a),c=this._map.getZoom(),d=a.x+":"+a.y,e=1<<c;a.x=
+b.distanceTo(c)});this._tilesToLoad=b.length;a=0;for(d=this._tilesToLoad;a<d;a++)this._addTile(b[a])},_removeOtherTiles:function(a){var b,c,d;for(d in this._tiles)if(this._tiles.hasOwnProperty(d)&&(b=d.split(":"),c=parseInt(b[0],10),b=parseInt(b[1],10),c<a.min.x||c>a.max.x||b<a.min.y||b>a.max.y))this._tiles[d].src="",this._tiles[d].parentNode==this._container&&this._container.removeChild(this._tiles[d]),delete this._tiles[d]},_addTile:function(a){var b=this._getTilePos(a),c=this._map.getZoom(),d=
-(a.x%e+e)%e;if(!(a.y<0||a.y>=e)){var f=this._createTile();L.DomUtil.setPosition(f,b);this._tiles[d]=f;if(this.options.scheme=="tms")a.y=e-a.y-1;this._loadTile(f,a,c);this._container.appendChild(f)}},_getTilePos:function(a){var b=this._map.getPixelOrigin();return a.multiplyBy(this.options.tileSize).subtract(b)},getTileUrl:function(a,b){return this._url.replace("{s}",this.options.subdomains[(a.x+a.y)%this.options.subdomains.length]).replace("{z}",b).replace("{x}",a.x).replace("{y}",a.y)},_createTileProto:function(){this._tileImg=
+a.x+":"+a.y,e=1<<c;a.x=(a.x%e+e)%e;if(!(a.y<0||a.y>=e)){var f=this._createTile();L.DomUtil.setPosition(f,b);this._tiles[d]=f;if(this.options.scheme=="tms")a.y=e-a.y-1;this._loadTile(f,a,c);this._container.appendChild(f)}},_getTilePos:function(a){var b=this._map.getPixelOrigin();return a.multiplyBy(this.options.tileSize).subtract(b)},getTileUrl:function(a,b){return this._url.replace("{s}",this.options.subdomains[(a.x+a.y)%this.options.subdomains.length]).replace("{z}",b).replace("{x}",a.x).replace("{y}",
-L.DomUtil.create("img","leaflet-tile");this._tileImg.galleryimg="no";var a=this.options.tileSize;this._tileImg.style.width=a+"px";this._tileImg.style.height=a+"px"},_createTile:function(){var a=this._tileImg.cloneNode(!1);a.onselectstart=a.onmousemove=L.Util.falseFn;return a},_loadTile:function(a,b,c){a._layer=this;a.onload=this._tileOnLoad;a.onerror=this._tileOnError;a.src=this.getTileUrl(b,c)},_tileOnLoad:function(){var a=this._layer;this.className+=" leaflet-tile-loaded";a.fire("tileload",{tile:this,
+a.y)},_createTileProto:function(){this._tileImg=L.DomUtil.create("img","leaflet-tile");this._tileImg.galleryimg="no";var a=this.options.tileSize;this._tileImg.style.width=a+"px";this._tileImg.style.height=a+"px"},_createTile:function(){var a=this._tileImg.cloneNode(!1);a.onselectstart=a.onmousemove=L.Util.falseFn;return a},_loadTile:function(a,b,c){a._layer=this;a.onload=this._tileOnLoad;a.onerror=this._tileOnError;a.src=this.getTileUrl(b,c)},_tileOnLoad:function(){var a=this._layer;this.className+=
-url:this.src});a._tilesToLoad--;a._tilesToLoad||a.fire("load")},_tileOnError:function(){var a=this._layer;a.fire("tileerror",{tile:this,url:this.src});if(a=a.options.errorTileUrl)this.src=a}});L.TileLayer.WMS=L.TileLayer.extend({defaultWmsParams:{service:"WMS",request:"GetMap",version:"1.1.1",layers:"",styles:"",format:"image/jpeg",transparent:!1},initialize:function(a,b){this._url=a;this.wmsParams=L.Util.extend({},this.defaultWmsParams);this.wmsParams.width=this.wmsParams.height=this.options.tileSize;for(var c in b)this.options.hasOwnProperty(c)||(this.wmsParams[c]=b[c]);L.Util.setOptions(this,b)},onAdd:function(a){this.wmsParams[parseFloat(this.wmsParams.version)>=1.3?"crs":"srs"]=a.options.crs.code;
+" leaflet-tile-loaded";a.fire("tileload",{tile:this,url:this.src});a._tilesToLoad--;a._tilesToLoad||a.fire("load")},_tileOnError:function(){var a=this._layer;a.fire("tileerror",{tile:this,url:this.src});if(a=a.options.errorTileUrl)this.src=a}});L.TileLayer.WMS=L.TileLayer.extend({defaultWmsParams:{service:"WMS",request:"GetMap",version:"1.1.1",layers:"",styles:"",format:"image/jpeg",transparent:!1},initialize:function(a,b){this._url=a;this.wmsParams=L.Util.extend({},this.defaultWmsParams);this.wmsParams.width=this.wmsParams.height=this.options.tileSize;for(var c in b)this.options.hasOwnProperty(c)||(this.wmsParams[c]=b[c]);L.Util.setOptions(this,b)},onAdd:function(a){this.wmsParams[parseFloat(this.wmsParams.version)>=1.3?"crs":"srs"]=a.options.crs.code;
 L.TileLayer.prototype.onAdd.call(this,a)},getTileUrl:function(a){var b=this.options.tileSize,a=a.multiplyBy(b),b=a.add(new L.Point(b,b)),a=this._map.unproject(a,this._zoom,!0),b=this._map.unproject(b,this._zoom,!0),a=this._map.options.crs.project(a),b=this._map.options.crs.project(b),b=[a.x,b.y,b.x,a.y].join(",");return this._url+L.Util.getParamString(this.wmsParams)+"&bbox="+b}});L.TileLayer.Canvas=L.TileLayer.extend({options:{async:!1},initialize:function(a){L.Util.setOptions(this,a)},_createTileProto:function(){this._canvasProto=L.DomUtil.create("canvas","leaflet-tile");var a=this.options.tileSize;this._canvasProto.width=a;this._canvasProto.height=a},_createTile:function(){var a=this._canvasProto.cloneNode(!1);a.onselectstart=a.onmousemove=L.Util.falseFn;return a},_loadTile:function(a,b,c){a._layer=this;this.drawTile(a,b,c);this.options.async||this.tileDrawn()},drawTile:function(){},
 tileDrawn:function(a){this._tileOnLoad.call(a)}});L.ImageOverlay=L.Class.extend({includes:L.Mixin.Events,initialize:function(a,b){this._url=a;this._bounds=b},onAdd:function(a){this._map=a;this._image||this._initImage();a.getPanes().overlayPane.appendChild(this._image);a.on("viewreset",this._reset,this);this._reset()},onRemove:function(a){a.getPanes().overlayPane.removeChild(this._image);a.off("viewreset",this._reset,this)},_initImage:function(){this._image=L.DomUtil.create("img","leaflet-image-layer");this._image.style.visibility="hidden";L.Util.extend(this._image,
 {galleryimg:"no",onselectstart:L.Util.falseFn,onmousemove:L.Util.falseFn,onload:this._onImageLoad,src:this._url})},_reset:function(){var a=this._map.latLngToLayerPoint(this._bounds.getNorthWest()),b=this._map.latLngToLayerPoint(this._bounds.getSouthEast()).subtract(a);L.DomUtil.setPosition(this._image,a);this._image.style.width=b.x+"px";this._image.style.height=b.y+"px"},_onImageLoad:function(){this.style.visibility=""}});L.Popup=L.Class.extend({includes:L.Mixin.Events,options:{maxWidth:300,autoPan:!0,closeButton:!0,offset:new L.Point(0,2),autoPanPadding:new L.Point(5,5)},initialize:function(a){L.Util.setOptions(this,a)},onAdd:function(a){this._map=a;this._container||this._initLayout();this._updateContent();this._container.style.opacity="0";this._map._panes.popupPane.appendChild(this._container);this._map.on("viewreset",this._updatePosition,this);if(this._map.options.closePopupOnClick)this._map.on("preclick",this._close,

src/layer/tile/TileLayer.js

@@ -156,6 +156,7 @@ L.TileLayer = L.Class.extend({
 				
 				// remove tile if it's out of bounds
 				if (x < bounds.min.x || x > bounds.max.x || y < bounds.min.y || y > bounds.max.y) {
+					this._tiles[key].src = '';
 					if (this._tiles[key].parentNode == this._container) {
 						this._container.removeChild(this._tiles[key]);
 					}