Installed leaflet in extlib

[mediagoblin.git] / extlib / leaflet / src / map / ext / Map.ZoomAnimation.js

diff --git a/extlib/leaflet/src/map/ext/Map.ZoomAnimation.js b/extlib/leaflet/src/map/ext/Map.ZoomAnimation.js
new file mode 100644 (file)
index 0000000..4bf7b9b
--- /dev/null
+++ b/extlib/leaflet/src/map/ext/Map.ZoomAnimation.js
@@ -0,0 +1,124 @@
+L.Map.include(!L.DomUtil.TRANSITION ? {} : {\r
+       _zoomToIfCenterInView: function(center, zoom, centerOffset) {\r
+               \r
+               if (this._animatingZoom) { return true; }\r
+               if (!this.options.zoomAnimation) { return false; }\r
+               \r
+               var zoomDelta = zoom - this._zoom,\r
+                       scale = Math.pow(2, zoomDelta),\r
+                       offset = centerOffset.divideBy(1 - 1/scale);\r
+               \r
+               //if offset does not exceed half of the view\r
+               if (!this._offsetIsWithinView(offset, 1)) { return false; }\r
+               \r
+               this._mapPane.className += ' leaflet-zoom-anim';\r
+\r
+               var centerPoint = this.containerPointToLayerPoint(this.getSize().divideBy(2)),\r
+                       origin = centerPoint.add(offset);\r
+               \r
+               this._prepareTileBg();\r
+       \r
+               this._runAnimation(center, zoom, scale, origin);\r
+               \r
+               return true;\r
+       },\r
+       \r
+       \r
+       _runAnimation: function(center, zoom, scale, origin) {\r
+               this._animatingZoom = true;\r
+\r
+               this._animateToCenter = center;\r
+               this._animateToZoom = zoom;\r
+               \r
+               var transform = L.DomUtil.TRANSFORM;\r
+               \r
+               //dumb FireFox hack, I have no idea why this magic zero translate fixes the scale transition problem\r
+               if (L.Browser.gecko || window.opera) {\r
+                       this._tileBg.style[transform] += ' translate(0,0)';\r
+               }\r
+               \r
+               var scaleStr;\r
+               \r
+               // Android doesn't like translate/scale chains, transformOrigin + scale works better but \r
+               // it breaks touch zoom which Anroid doesn't support anyway, so that's a really ugly hack\r
+               // TODO work around this prettier\r
+               if (L.Browser.android) {\r
+                       this._tileBg.style[transform + 'Origin'] = origin.x + 'px ' + origin.y + 'px';\r
+                       scaleStr = 'scale(' + scale + ')';\r
+               } else {\r
+                       scaleStr = L.DomUtil.getScaleString(scale, origin);\r
+               }\r
+               \r
+               L.Util.falseFn(this._tileBg.offsetWidth); //hack to make sure transform is updated before running animation\r
+               \r
+               var options = {};\r
+               options[transform] = this._tileBg.style[transform] + ' ' + scaleStr;\r
+               this._tileBg.transition.run(options);\r
+       },\r
+       \r
+       _prepareTileBg: function() {\r
+               if (!this._tileBg) {\r
+                       this._tileBg = this._createPane('leaflet-tile-pane', this._mapPane);\r
+                       this._tileBg.style.zIndex = 1;\r
+               }\r
+\r
+               var tilePane = this._tilePane,\r
+                       tileBg = this._tileBg;\r
+               \r
+               // prepare the background pane to become the main tile pane\r
+               //tileBg.innerHTML = '';\r
+               tileBg.style[L.DomUtil.TRANSFORM] = '';\r
+               tileBg.style.visibility = 'hidden';\r
+               \r
+               // tells tile layers to reinitialize their containers\r
+               tileBg.empty = true;\r
+               tilePane.empty = false;\r
+\r
+               this._tilePane = this._panes.tilePane = tileBg;\r
+               this._tileBg = tilePane;\r
+               \r
+               if (!this._tileBg.transition) {\r
+                       this._tileBg.transition = new L.Transition(this._tileBg, {duration: 0.3, easing: 'cubic-bezier(0.25,0.1,0.25,0.75)'});\r
+                       this._tileBg.transition.on('end', this._onZoomTransitionEnd, this);\r
+               }\r
+               \r
+               this._stopLoadingBgTiles();\r
+       },\r
+       \r
+       // stops loading all tiles in the background layer\r
+       _stopLoadingBgTiles: function() {\r
+               var tiles = [].slice.call(this._tileBg.getElementsByTagName('img'));\r
+               \r
+               for (var i = 0, len = tiles.length; i < len; i++) {\r
+                       if (!tiles[i].complete) {\r
+                               tiles[i].src = '';\r
+                               tiles[i].parentNode.removeChild(tiles[i]);\r
+                       }\r
+               }\r
+       },\r
+       \r
+       _onZoomTransitionEnd: function() {\r
+               this._restoreTileFront();\r
+               \r
+               L.Util.falseFn(this._tileBg.offsetWidth);\r
+               this._resetView(this._animateToCenter, this._animateToZoom, true);\r
+               \r
+               //TODO clear tileBg on map layersload\r
+               \r
+               this._mapPane.className = this._mapPane.className.replace(' leaflet-zoom-anim', ''); //TODO toggleClass util\r
+               this._animatingZoom = false;\r
+       },\r
+       \r
+       _restoreTileFront: function() {\r
+               this._tilePane.innerHTML = '';\r
+               this._tilePane.style.visibility = '';\r
+               this._tilePane.style.zIndex = 2;\r
+               this._tileBg.style.zIndex = 1;\r
+       },\r
+       \r
+       _clearTileBg: function() {\r
+               if (!this._animatingZoom && !this.touchZoom._zooming) {\r
+                       this._tileBg.innerHTML = '';\r
+               }\r
+       }\r
+});
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