/*
* Ext JS Library 3.0 Pre-alpha
* Copyright(c) 2006-2008, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
Ext.lib.Event = function() {
var loadComplete = false,
listeners = [],
unloadListeners = [],
retryCount = 0,
onAvailStack = [],
_interval,
locked = false,
win = window,
doc = document,
// constants
POLL_RETRYS = 200,
POLL_INTERVAL = 20,
EL = 0,
TYPE = 1,
FN = 2,
WFN = 3,
OBJ = 3,
ADJ_SCOPE = 4,
// private
doAdd = function() {
var ret;
if (win.addEventListener) {
ret = function(el, eventName, fn, capture) {
if (eventName == 'mouseenter') {
fn = fn.createInterceptor(checkRelatedTarget);
el.addEventListener('mouseover', fn, (capture));
} else if (eventName == 'mouseleave') {
fn = fn.createInterceptor(checkRelatedTarget);
el.addEventListener('mouseout', fn, (capture));
} else {
el.addEventListener(eventName, fn, (capture));
}
return fn;
};
} else if (win.attachEvent) {
ret = function(el, eventName, fn, capture) {
el.attachEvent("on" + eventName, fn);
return fn;
};
} else {
ret = function(){};
}
return ret;
}(),
// private
doRemove = function(){
var ret;
if (win.removeEventListener) {
ret = function (el, eventName, fn, capture) {
if (eventName == 'mouseenter') {
eventName = 'mouseover'
} else if (eventName == 'mouseleave') {
eventName = 'mouseout'
}
el.removeEventListener(eventName, fn, (capture));
};
} else if (win.detachEvent) {
ret = function (el, eventName, fn) {
el.detachEvent("on" + eventName, fn);
};
} else {
ret = function(){};
}
return ret;
}();
function checkRelatedTarget(e) {
var related = e.relatedTarget,
isXulEl = Object.prototype.toString.apply(related) == '[object XULElement]';
if (!related) return false;
return (!isXulEl && related != this && this.tag != 'document' && !elContains(this, related));
}
function elContains(parent, child) {
while(child) {
if(child === parent) {
return true;
}
try {
child = child.parentNode;
} catch(e) {
// In FF if you mouseout an text input element
// thats inside a div sometimes it randomly throws
// Permission denied to get property HTMLDivElement.parentNode
// See https://bugzilla.mozilla.org/show_bug.cgi?id=208427
return false;
}
if(child && (child.nodeType != 1)) {
child = null;
}
}
return false;
}
// private
function _getCacheIndex(el, eventName, fn) {
var index = -1;
Ext.each(listeners, function (v,i) {
if(v && v[FN] == fn && v[EL] == el && v[TYPE] == eventName) {
index = i;
}
});
return index;
}
// private
function _tryPreloadAttach() {
var ret = false,
notAvail = [],
element,
tryAgain = !loadComplete || (retryCount > 0);
if (!locked) {
locked = true;
Ext.each(onAvailStack, function (v,i,a){
if(v && (element = doc.getElementById(v.id))){
if(!v.checkReady || loadComplete || element.nextSibling || (doc && doc.body)) {
element = v.override ? (v.override === true ? v.obj : v.override) : element;
v.fn.call(element, v.obj);
onAvailStack[i] = null;
} else {
notAvail.push(item);
}
}
});
retryCount = (notAvail.length == 0) ? 0 : retryCount - 1;
if (tryAgain) {
startInterval();
} else {
clearInterval(_interval);
_interval = null;
}
ret = !(locked = false);
}
return ret;
}
// private
function startInterval() {
if (!_interval) {
var callback = function() {
_tryPreloadAttach();
};
_interval = setInterval(callback, pub.POLL_INTERVAL);
}
}
// private
function getScroll() {
var scroll = Ext.get(doc).getScroll();
return [scroll.top, scroll.top];
}
// private
function getPageCoord (ev, xy) {
ev = ev.browserEvent || ev;
var coord = ev['page' + xy];
if (!coord && 0 != coord) {
coord = ev['client' + xy] || 0;
if (Ext.isIE) {
coord += getScroll()[xy == "X" ? 0 : 1];
}
}
return coord;
}
var pub = {
onAvailable : function(p_id, p_fn, p_obj, p_override) {
onAvailStack.push({
id: p_id,
fn: p_fn,
obj: p_obj,
override: p_override,
checkReady: false });
retryCount = this.POLL_RETRYS;
startInterval();
},
addListener: function(el, eventName, fn) {
var ret;
el = Ext.getDom(el);
if (el && fn) {
if ("unload" == eventName) {
ret = !!(unloadListeners[unloadListeners.length] = [el, eventName, fn]);
} else {
listeners.push([el, eventName, fn, ret = doAdd(el, eventName, fn, false)]);
}
}
return !!ret;
},
removeListener: function(el, eventName, fn) {
var ret = false,
index,
cacheItem;
el = Ext.getDom(el);
if(!fn) {
ret = this.purgeElement(el, false, eventName);
} else if ("unload" == eventName) {
Ext.each(unloadListeners, function(v, i, a) {
if( v && v[0] == el && v[1] == evantName && v[2] == fn) {
unloadListeners.splice(i, 1);
ret = true;
}
});
} else {
index = arguments[3] || _getCacheIndex(el, eventName, fn);
cacheItem = listeners[index];
if (el && cacheItem) {
doRemove(el, eventName, cacheItem[WFN], false);
cacheItem[WFN] = cacheItem[FN] = null;
listeners.splice(index, 1);
ret = true;
}
}
return ret;
},
getTarget : function(ev) {
ev = ev.browserEvent || ev;
return this.resolveTextNode(ev.target || ev.srcElement);
},
resolveTextNode : function(node) {
return Ext.isSafari && node && 3 == node.nodeType ? node.parentNode : node;
},
getPageX : function(ev) {
return getPageCoord(ev, "X");
},
getPageY : function(ev) {
return getPageCoord(ev, "Y");
},
getXY : function(ev) {
return [this.getPageX(ev), this.getPageY(ev)];
},
getRelatedTarget : function(ev) {
ev = ev.browserEvent || ev;
return this.resolveTextNode(ev.relatedTarget ||
(ev.type == "mouseout" ? ev.toElement :
ev.type == "mouseover" ? ev.fromElement : null));
},
// Is this useful? Removing to save space unless use case exists.
// getTime: function(ev) {
// ev = ev.browserEvent || ev;
// if (!ev.time) {
// var t = new Date().getTime();
// try {
// ev.time = t;
// } catch(ex) {
// return t;
// }
// }
// return ev.time;
// },
stopEvent : function(ev) {
this.stopPropagation(ev);
this.preventDefault(ev);
},
stopPropagation : function(ev) {
ev = ev.browserEvent || ev;
if (ev.stopPropagation) {
ev.stopPropagation();
} else {
ev.cancelBubble = true;
}
},
preventDefault : function(ev) {
ev = ev.browserEvent || ev;
if (ev.preventDefault) {
ev.preventDefault();
} else {
ev.returnValue = false;
}
},
getEvent : function(e) {
e = e || win.event;
if (!e) {
var c = this.getEvent.caller;
while (c) {
e = c.arguments[0];
if (e && Event == e.constructor) {
break;
}
c = c.caller;
}
}
return e;
},
getCharCode : function(ev) {
ev = ev.browserEvent || ev;
return ev.charCode || ev.keyCode || 0;
},
//clearCache: function() {},
_load : function(e) {
loadComplete = true;
var EU = Ext.lib.Event;
if (Ext.isIE && e !== true) {
doRemove(win, "load", EU._load);
}
},
purgeElement : function(el, recurse, eventName) {
var me = this;
Ext.each( me.getListeners(el, eventName), function(v){
if(v) me.removeListener(el, v.type, v.fn);
});
if (recurse && el && el.childNodes) {
Ext.each(el.childNodes, function(v){
me.purgeElement(v, recurse, eventName);
});
}
},
getListeners : function(el, eventName) {
var me = this,
results = [],
searchLists = [listeners, unloadListeners];
if (eventName) {
searchLists.splice(eventName == "unload" ? 0 : 1 ,1);
} else {
searchLists = searchLists[0].concat(searchLists[1]);
}
Ext.each(searchLists, function(v, i){
if (v && v[me.EL] == el && (!eventName || eventName == v[me.type])) {
results.push({
type: v[TYPE],
fn: v[FN],
obj: v[OBJ],
adjust: v[ADJ_SCOPE],
index: i
});
}
});
return results.length ? results : null;
},
_unload : function(e) {
var EU = Ext.lib.Event,
i,
j,
l,
len,
index,
scope;
Ext.each(unloadListeners, function(v) {
if (v) {
scope = v[ADJ_SCOPE] ? (v[ADJ_SCOPE] === true ? v[OBJ] : v[ADJ_SCOPE]) : win;
v[FN].call(scope, EU.getEvent(e), v[OBJ]);
}
});
unloadListeners = null;
if (listeners && (j = listeners.length)) {
while (j) {
if (l = listeners[index = --j]) {
EU.removeListener(l[EL], l[TYPE], l[FN], index);
}
}
//EU.clearCache();
}
doRemove(win, "unload", EU._unload);
}
};
// Initialize stuff.
pub.on = pub.addListener;
pub.un = pub.removeListener;
if (doc && doc.body) {
pub._load(true);
} else {
doAdd(win, "load", pub._load);
}
doAdd(win, "unload", pub._unload);
_tryPreloadAttach();
return pub;
}();
