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/*
* L.DomEvent contains functions for working with DOM events.
*/
L.DomEvent = {
/* inpired by John Resig, Dean Edwards and YUI addEvent implementations */
addListener: function(/*HTMLElement*/ obj, /*String*/ type, /*Function*/ fn, /*Object*/ context) {
var id = L.Util.stamp(fn);
function handler(e) {
return fn.call(context || obj, e || L.DomEvent._getEvent());
}
if (L.Browser.touch && (type == 'dblclick') && this.addDoubleTapListener) {
this.addDoubleTapListener(obj, handler, id);
} else if ('addEventListener' in obj) {
if (type == 'mousewheel') {
obj.addEventListener('DOMMouseScroll', handler, false);
obj.addEventListener(type, handler, false);
} else if ((type == 'mouseenter') || (type == 'mouseleave')) {
var 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 {
obj.addEventListener(type, handler, false);
}
} else if ('attachEvent' in obj) {
obj.attachEvent("on" + type, handler);
}
obj['_leaflet_' + type + id] = handler;
},
removeListener: function(/*HTMLElement*/ obj, /*String*/ type, /*Function*/ fn) {
var id = L.Util.stamp(fn),
key = '_leaflet_' + type + id;
handler = obj[key];
if (L.Browser.mobileWebkit && (type == 'dblclick') && this.removeDoubleTapListener) {
this.removeDoubleTapListener(obj, id);
} else if ('removeEventListener' in obj) {
if (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;
},
_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()/*->Event*/ {
var e = window.event;
if (!e) {
var caller = arguments.callee.caller;
while (caller) {
e = caller['arguments'][0];
if (e && Event == e.constructor) { break; }
caller = caller.caller;
}
}
return e;
},
stopPropagation: function(/*Event*/ e) {
if (e.stopPropagation) {
e.stopPropagation();
} else {
e.cancelBubble = true;
}
},
disableClickPropagation: function(/*HTMLElement*/ el) {
L.DomEvent.addListener(el, 'mousedown', L.DomEvent.stopPropagation);
L.DomEvent.addListener(el, 'click', L.DomEvent.stopPropagation);
L.DomEvent.addListener(el, 'dblclick', L.DomEvent.stopPropagation);
},
preventDefault: function(/*Event*/ e) {
if (e.preventDefault) {
e.preventDefault();
} else {
e.returnValue = false;
}
},
stop: function(e) {
L.DomEvent.preventDefault(e);
L.DomEvent.stopPropagation(e);
},
getMousePosition: function(e, container) {
var x = e.pageX ? e.pageX : e.clientX +
document.body.scrollLeft + document.documentElement.scrollLeft,
y = e.pageY ? e.pageY : e.clientY +
document.body.scrollTop + document.documentElement.scrollTop,
pos = new L.Point(x, y);
return (container ?
pos.subtract(L.DomUtil.getCumulativeOffset(container)) : pos);
},
getWheelDelta: function(e) {
var delta = 0;
if (e.wheelDelta) { delta = e.wheelDelta/120; }
if (e.detail) { delta = -e.detail/3; }
return delta;
}
};
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