1 files changed, 129 insertions, 0 deletions
diff --git a/extlib/leaflet/src/dom/Draggable.js b/extlib/leaflet/src/dom/Draggable.js
new file mode 100644
index 00000000..c0aea23e
--- /dev/null
+++ b/extlib/leaflet/src/dom/Draggable.js
@@ -0,0 +1,129 @@
+/*
+ * L.Draggable allows you to add dragging capabilities to any element. Supports mobile devices too.
+ */
+
+L.Draggable = L.Class.extend({
+	includes: L.Mixin.Events,
+	
+	statics: {
+		START: L.Browser.touch ? 'touchstart' : 'mousedown',
+		END: L.Browser.touch ? 'touchend' : 'mouseup',
+		MOVE: L.Browser.touch ? 'touchmove' : 'mousemove',
+		TAP_TOLERANCE: 15
+	},
+	
+	initialize: function(element, dragStartTarget) {
+		this._element = element;
+		this._dragStartTarget = dragStartTarget || element;
+	},
+	
+	enable: function() {
+		if (this._enabled) { return; }
+		L.DomEvent.addListener(this._dragStartTarget, L.Draggable.START, this._onDown, this);
+		this._enabled = true;
+	},
+	
+	disable: function() {
+		if (!this._enabled) { return; }
+		L.DomEvent.removeListener(this._dragStartTarget, L.Draggable.START, this._onDown);
+		this._enabled = false;
+	},
+
+	_onDown: function(e) {
+		if (e.shiftKey || ((e.which != 1) && (e.button != 1) && !e.touches)) { return; }
+		
+		if (e.touches && e.touches.length > 1) { return; }
+
+		var first = (e.touches && e.touches.length == 1 ? e.touches[0] : e);
+		
+		L.DomEvent.preventDefault(e);
+			
+		if (L.Browser.mobileWebkit) {
+			first.target.className += ' leaflet-active';
+		}
+		
+		this._moved = false;
+		
+		L.DomUtil.disableTextSelection();
+		this._setMovingCursor();
+		
+		this._startPos = this._newPos = L.DomUtil.getPosition(this._element);
+		this._startPoint = new L.Point(first.clientX, first.clientY);
+		
+		L.DomEvent.addListener(document, L.Draggable.MOVE, this._onMove, this);
+		L.DomEvent.addListener(document, L.Draggable.END, this._onUp, this);
+	},
+	
+	_onMove: function(e) {
+		if (e.touches && e.touches.length > 1) { return; }
+
+		L.DomEvent.preventDefault(e);
+		
+		var first = (e.touches && e.touches.length == 1 ? e.touches[0] : e);
+		
+		if (!this._moved) {
+			this.fire('dragstart');
+			this._moved = true;
+		}
+
+		var newPoint = new L.Point(first.clientX, first.clientY);
+		this._newPos = this._startPos.add(newPoint).subtract(this._startPoint);
+		
+		L.Util.requestAnimFrame(this._updatePosition, this, true);
+		
+		this.fire('drag');
+	},
+	
+	_updatePosition: function() {
+		L.DomUtil.setPosition(this._element, this._newPos);
+	},
+	
+	_onUp: function(e) {
+		if (e.changedTouches) {
+			var first = e.changedTouches[0],
+				el = first.target,
+				dist = (this._newPos && this._newPos.distanceTo(this._startPos)) || 0;
+			
+			el.className = el.className.replace(' leaflet-active', '');
+			
+			if (dist < L.Draggable.TAP_TOLERANCE) {
+				this._simulateEvent('click', first);
+			}
+		}
+		
+		L.DomUtil.enableTextSelection();
+		
+		this._restoreCursor();
+		
+		L.DomEvent.removeListener(document, L.Draggable.MOVE, this._onMove);
+		L.DomEvent.removeListener(document, L.Draggable.END, this._onUp);
+		
+		if (this._moved) {
+			this.fire('dragend');
+		}
+	},
+	
+	_removeActiveClass: function(el) {
+	},
+	
+	_setMovingCursor: function() {
+		this._bodyCursor = document.body.style.cursor;
+		document.body.style.cursor = 'move';
+	},
+	
+	_restoreCursor: function() {
+		document.body.style.cursor = this._bodyCursor;
+	},
+	
+	_simulateEvent: function(type, e) {
+		var simulatedEvent = document.createEvent('MouseEvent');
+		
+		simulatedEvent.initMouseEvent(
+				type, true, true, window, 1, 
+				e.screenX, e.screenY, 
+				e.clientX, e.clientY, 
+				false, false, false, false, 0, null);
+		
+		e.target.dispatchEvent(simulatedEvent);
+	}
+});