update changelog and build

CHANGELOG.md

@@ -25,8 +25,8 @@ An in-progress version being developed on the master branch.
  * Improved zoom behavior so that there's no drift of coordinates when you change zoom back and forth without panning. [#426](https://github.com/Leaflet/Leaflet/issues/426)
  * Improved double click behavior to zoom while keeping the clicked point fixed (by [@ansis](https://github.com/ansis)). [#1582](https://github.com/Leaflet/Leaflet/issues/1582)
  * Improved attribution control to be much less obtrusive (no "powered by", just a Leaflet link). You can still remove the prefix with `map.attributionControl.setPrefix('')` if you need.
+ * Improved dragging behavior to not get stuck if mouse moved outside of an iframe containing the map (by [@jfirebaugh](https://github.com/jfirebaugh)). [#1277](https://github.com/Leaflet/Leaflet/issues/1277) [#1782](https://github.com/Leaflet/Leaflet/issues/1782) [#1786](https://github.com/Leaflet/Leaflet/issues/1786)
  * Improved box zoom to be cancelable by pressing Escape (by [@yohanboniface](https://github.com/yohanboniface)). [#1438](https://github.com/Leaflet/Leaflet/issues/1438)
- * Improved paths with `clickable: false` to allow mouse events to pass through to objects underneath (by [@snkashis](https://github.com/snkashis)). [#1384](https://github.com/Leaflet/Leaflet/pull/1384) [#1281](https://github.com/Leaflet/Leaflet/issues/1281)
  * Improved `Marker` popups to close on marker click if opened (by [@popox](https://github.com/popox)). [#1761](https://github.com/Leaflet/Leaflet/issues/1761)
 
 #### API improvements
@@ -63,6 +63,7 @@ An in-progress version being developed on the master branch.
  * Added `Marker` `togglePopup` method (by [@popox](https://github.com/popox)). [#1761](https://github.com/Leaflet/Leaflet/issues/1761)
  * Added `Popup` `closeOnClick` option that overrides the same `Map` option for specific popups (by [@jfirebaugh](https://github.com/jfirebaugh)). [#1669](https://github.com/Leaflet/Leaflet/issues/1669)
  * Added `TileLayer.WMS` `crs` option to be able to use WMS of CRS other than the map CRS (by [@kengu](https://github.com/kengu)). [#942](https://github.com/Leaflet/Leaflet/issues/942) [#945](https://github.com/Leaflet/Leaflet/issues/945)
+ * Improved paths with `clickable: false` to allow mouse events to pass through to objects underneath (by [@snkashis](https://github.com/snkashis)). [#1384](https://github.com/Leaflet/Leaflet/pull/1384) [#1281](https://github.com/Leaflet/Leaflet/issues/1281)
 
 ##### Map API improvements
 

dist/leaflet-src.js

@@ -1092,7 +1092,11 @@ L.DomUtil.TRANSITION_END =
 	var userSelectProperty = L.DomUtil.testProp(
 		['userSelect', 'WebkitUserSelect', 'OUserSelect', 'MozUserSelect', 'msUserSelect']);
 
-	L.DomUtil.disableTextSelection = function () {
+	var userDragProperty = L.DomUtil.testProp(
+		['userDrag', 'WebkitUserDrag', 'OUserDrag', 'MozUserDrag', 'msUserDrag']);
+
+	L.extend(L.DomUtil, {
+		disableTextSelection: function () {
 			if (userSelectProperty) {
 				var style = document.documentElement.style;
 				this._userSelect = style[userSelectProperty];
@@ -1100,16 +1104,36 @@ L.DomUtil.TRANSITION_END =
 			} else {
 				L.DomEvent.on(window, 'selectstart', L.DomEvent.stop);
 			}
-	};
+		},
 
-	L.DomUtil.enableTextSelection = function () {
+		enableTextSelection: function () {
 			if (userSelectProperty) {
 				document.documentElement.style[userSelectProperty] = this._userSelect;
 				delete this._userSelect;
 			} else {
 				L.DomEvent.off(window, 'selectstart', L.DomEvent.stop);
 			}
-	};
+		},
+
+		disableImageDrag: function () {
+			if (userDragProperty) {
+				var style = document.documentElement.style;
+				this._userDrag = style[userDragProperty];
+				style[userDragProperty] = 'none';
+			} else {
+				L.DomEvent.on(window, 'dragstart', L.DomEvent.stop);
+			}
+		},
+
+		enableImageDrag: function () {
+			if (userDragProperty) {
+				document.documentElement.style[userDragProperty] = this._userDrag;
+				delete this._userDrag;
+			} else {
+				L.DomEvent.off(window, 'dragstart', L.DomEvent.stop);
+			}
+		}
+	});
 })();
 
 
@@ -6416,11 +6440,12 @@ L.Draggable = L.Class.extend({
 		if (e.shiftKey || ((e.which !== 1) && (e.button !== 1) && !e.touches)) { return; }
 
 		L.DomEvent
-			.preventDefault(e)
 			.stopPropagation(e);
 
 		if (L.Draggable._disabled) { return; }
 
+		L.DomUtil.disableImageDrag();
+
 		var first = e.touches ? e.touches[0] : e,
 		    el = first.target;
 
@@ -6489,6 +6514,8 @@ L.Draggable = L.Class.extend({
 			    .off(document, L.Draggable.END[i], this._onUp);
 		}
 
+		L.DomUtil.enableImageDrag();
+
 		if (this._moved) {
 			// ensure drag is not fired after dragend
 			L.Util.cancelAnimFrame(this._animRequest);
@@ -7277,6 +7304,7 @@ L.Map.BoxZoom = L.Handler.extend({
 		if (!e.shiftKey || ((e.which !== 1) && (e.button !== 1))) { return false; }
 
 		L.DomUtil.disableTextSelection();
+		L.DomUtil.disableImageDrag();
 
 		this._startLayerPoint = this._map.mouseEventToLayerPoint(e);
 
@@ -7289,8 +7317,7 @@ L.Map.BoxZoom = L.Handler.extend({
 		L.DomEvent
 		    .on(document, 'mousemove', this._onMouseMove, this)
 		    .on(document, 'mouseup', this._onMouseUp, this)
-		    .on(document, 'keydown', this._onKeyDown, this)
-		    .preventDefault(e);
+		    .on(document, 'keydown', this._onKeyDown, this);
 
 		this._map.fire('boxzoomstart');
 	},
@@ -7318,6 +7345,7 @@ L.Map.BoxZoom = L.Handler.extend({
 		this._container.style.cursor = '';
 
 		L.DomUtil.enableTextSelection();
+		L.DomUtil.enableImageDrag();
 
 		L.DomEvent
 		    .off(document, 'mousemove', this._onMouseMove)