Code coverage report for src/dom/DomEvent.js

Statements: 45.83% (44 / 96)      Branches: 41.38% (36 / 87)      Functions: 42.86% (6 / 14)      Lines: 46.74% (43 / 92)     

All files » src/dom/ » DomEvent.js
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/*
 * L.DomEvent contains functions for working with DOM events.
 */
 
L.DomEvent = {
	/* inspired by John Resig, Dean Edwards and YUI addEvent implementations */
	addListener: function (obj, type, fn, context) { // (HTMLElement, String, Function[, Object])
 
		var id = L.stamp(fn),
		    key = '_leaflet_' + type + id,
		    handler, originalHandler, newType;
 
		if (obj[key]) { return this; }
 
		handler = function (e) {
			return fn.call(context || obj, e || L.DomEvent._getEvent());
		};
 
		Iif (L.Browser.msTouch && type.indexOf('touch') === 0) {
			return this.addMsTouchListener(obj, type, handler, id);
		}
		Iif (L.Browser.touch && (type === 'dblclick') && this.addDoubleTapListener) {
			this.addDoubleTapListener(obj, handler, id);
		}
 
		Eif ('addEventListener' in obj) {
 
			if (type === 'mousewheel') {
				obj.addEventListener('DOMMouseScroll', handler, false);
				obj.addEventListener(type, handler, false);
 
			} else if ((type === 'mouseenter') || (type === 'mouseleave')) {
 
				originalHandler = handler;
				newType = (type === 'mouseenter' ? 'mouseover' : 'mouseout');
 
				handler = function (e) {
					if (!L.DomEvent._checkMouse(obj, e)) { return; }
					return originalHandler(e);
				};
 
				obj.addEventListener(newType, handler, false);
 
			} else Iif (type === 'click' && L.Browser.android) {
				originalHandler = handler;
				handler = function (e) {
					return L.DomEvent._filterClick(e, originalHandler);
				};
 
				obj.addEventListener(type, handler, false);
			} else {
				obj.addEventListener(type, handler, false);
			}
 
		} else if ('attachEvent' in obj) {
			obj.attachEvent("on" + type, handler);
		}
 
		obj[key] = handler;
 
		return this;
	},
 
	removeListener: function (obj, type, fn) {  // (HTMLElement, String, Function)
 
		var id = L.stamp(fn),
		    key = '_leaflet_' + type + id,
		    handler = obj[key];
 
		Iif (!handler) { return this; }
 
		Iif (L.Browser.msTouch && type.indexOf('touch') === 0) {
			this.removeMsTouchListener(obj, type, id);
		} else Iif (L.Browser.touch && (type === 'dblclick') && this.removeDoubleTapListener) {
			this.removeDoubleTapListener(obj, id);
 
		} else Eif ('removeEventListener' in obj) {
 
			Iif (type === 'mousewheel') {
				obj.removeEventListener('DOMMouseScroll', handler, false);
				obj.removeEventListener(type, handler, false);
 
			} else if ((type === 'mouseenter') || (type === 'mouseleave')) {
				obj.removeEventListener((type === 'mouseenter' ? 'mouseover' : 'mouseout'), handler, false);
			} else {
				obj.removeEventListener(type, handler, false);
			}
		} else if ('detachEvent' in obj) {
			obj.detachEvent("on" + type, handler);
		}
 
		obj[key] = null;
 
		return this;
	},
 
	stopPropagation: function (e) {
 
		Eif (e.stopPropagation) {
			e.stopPropagation();
		} else {
			e.cancelBubble = true;
		}
		return this;
	},
 
	disableClickPropagation: function (el) {
 
		var stop = L.DomEvent.stopPropagation;
 
		for (var i = L.Draggable.START.length - 1; i >= 0; i--) {
			L.DomEvent.addListener(el, L.Draggable.START[i], stop);
		}
 
		return L.DomEvent
			.addListener(el, 'click', stop)
			.addListener(el, 'dblclick', stop);
	},
 
	preventDefault: function (e) {
 
		Eif (e.preventDefault) {
			e.preventDefault();
		} else {
			e.returnValue = false;
		}
		return this;
	},
 
	stop: function (e) {
		return L.DomEvent.preventDefault(e).stopPropagation(e);
	},
 
	getMousePosition: function (e, container) {
 
		var body = document.body,
		    docEl = document.documentElement,
		    x = e.pageX ? e.pageX : e.clientX + body.scrollLeft + docEl.scrollLeft,
		    y = e.pageY ? e.pageY : e.clientY + body.scrollTop + docEl.scrollTop,
		    pos = new L.Point(x, y);
 
		return (container ? pos._subtract(L.DomUtil.getViewportOffset(container)) : pos);
	},
 
	getWheelDelta: function (e) {
 
		var delta = 0;
 
		if (e.wheelDelta) {
			delta = e.wheelDelta / 120;
		}
		if (e.detail) {
			delta = -e.detail / 3;
		}
		return delta;
	},
 
	// check if element really left/entered the event target (for mouseenter/mouseleave)
	_checkMouse: function (el, e) {
 
		var related = e.relatedTarget;
 
		if (!related) { return true; }
 
		try {
			while (related && (related !== el)) {
				related = related.parentNode;
			}
		} catch (err) {
			return false;
		}
		return (related !== el);
	},
 
	_getEvent: function () { // evil magic for IE
		/*jshint noarg:false */
		var e = window.event;
		if (!e) {
			var caller = arguments.callee.caller;
			while (caller) {
				e = caller['arguments'][0];
				if (e && window.Event === e.constructor) {
					break;
				}
				caller = caller.caller;
			}
		}
		return e;
	},
 
	// this solves a bug in Android WebView where a single touch triggers two click events.
	_filterClick: function (e, handler) {
		var elapsed = L.DomEvent._lastClick && (e.timeStamp - L.DomEvent._lastClick);
 
		// are they closer together than 400ms yet more than 100ms?
		// Android typically triggers them ~300ms apart while multiple listeners
		// on the same event should be triggered far faster.
 
		if (elapsed && elapsed > 100 && elapsed < 400) {
			L.DomEvent.stop(e);
			return;
		}
		L.DomEvent._lastClick = e.timeStamp;
 
		return handler(e);
	}
};
 
L.DomEvent.on = L.DomEvent.addListener;
L.DomEvent.off = L.DomEvent.removeListener;