GZ/nwyj/.svn/pristine/75/75674460cfa8424e73de5951a82daa5cc60462d5.svn-base

/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
YAHOO.util.CustomEvent = function(type, oScope) {
	this.type = type;
	this.scope = oScope || window;
	this.subscribers = [];
	if (YAHOO.util["Event"]) {
		YAHOO.util.Event.regCE(this);
	}
};
YAHOO.util.CustomEvent.prototype = {
	subscribe : function(fn, obj, bOverride) {
		this.subscribers.push(new YAHOO.util.Subscriber(fn, obj, bOverride));
	},
	unsubscribe : function(fn, obj) {
		var found = false;
		for (var i = 0; i < this.subscribers.length; ++i) {
			var s = this.subscribers[i];
			if (s && s.contains(fn, obj)) {
				this._delete(i);
				found = true;
			}
		}
		return found;
	},
	fire : function() {
		for (var i = 0; i < this.subscribers.length; ++i) {
			var s = this.subscribers[i];
			if (s) {
				var scope = (s.override) ? s.obj : this.scope;
				s.fn.call(scope, this.type, arguments, s.obj);
			}
		}
	},
	unsubscribeAll : function() {
		for (var i = 0; i < this.subscribers.length; ++i) {
			this._delete(i);
		}
	},
	_delete : function(index) {
		var s = this.subscribers[index];
		if (s) {
			delete s.fn;
			delete s.obj;
		}
		delete this.subscribers[index];
	}
};
YAHOO.util.Subscriber = function(fn, obj, bOverride) {
	this.fn = fn;
	this.obj = obj || null;
	this.override = (bOverride);
};
YAHOO.util.Subscriber.prototype.contains = function(fn, obj) {
	return (this.fn == fn && this.obj == obj);
};
if (!YAHOO.util.Event) {
	YAHOO.util.Event = function() {
		var loadComplete = false;
		var listeners = [];
		var delayedListeners = [];
		var unloadListeners = [];
		var customEvents = [];
		var legacyEvents = [];
		var legacyHandlers = [];
		return {
			EL : 0,
			TYPE : 1,
			FN : 2,
			WFN : 3,
			SCOPE : 3,
			ADJ_SCOPE : 4,
			isSafari : (navigator.userAgent.match(/safari/gi)),
			isIE : (!this.isSafari && navigator.userAgent.match(/msie/gi)),
			addListener : function(el, sType, fn, oScope, bOverride) {
				if (this._isValidCollection(el)) {
					var ok = true;
					for (var i = 0; i < el.length; ++i) {
						ok = (this.on(el[i], sType, fn, oScope, bOverride) && ok);
					}
					return ok;
				} else if (typeof el == "string") {
					if (loadComplete) {
						el = this.getEl(el);
					} else {
						delayedListeners[delayedListeners.length] = [el, sType,
								fn, oScope, bOverride];
						return true;
					}
				}
				if (!el) {
					return false;
				}
				if ("unload" == sType && oScope !== this) {
					unloadListeners[unloadListeners.length] = [el, sType, fn,
							oScope, bOverride];
					return true;
				}
				var scope = (bOverride) ? oScope : el;
				var wrappedFn = function(e) {
					return fn.call(scope, YAHOO.util.Event.getEvent(e), oScope);
				};
				var li = [el, sType, fn, wrappedFn, scope];
				var index = listeners.length;
				listeners[index] = li;
				if (this.useLegacyEvent(el, sType)) {
					var legacyIndex = this.getLegacyIndex(el, sType);
					if (legacyIndex == -1) {
						legacyIndex = legacyEvents.length;
						legacyEvents[legacyIndex] = [el, sType,
								el["on" + sType]];
						legacyHandlers[legacyIndex] = [];
						el["on" + sType] = function(e) {
							YAHOO.util.Event.fireLegacyEvent(YAHOO.util.Event
											.getEvent(e), legacyIndex);
						};
					}
					legacyHandlers[legacyIndex].push(index);
				} else if (el.addEventListener) {
					el.addEventListener(sType, wrappedFn, false);
				} else if (el.attachEvent) {
					el.attachEvent("on" + sType, wrappedFn);
				}
				return true;
			},
			fireLegacyEvent : function(e, legacyIndex) {
				var ok = true;
				var le = legacyHandlers[legacyIndex];
				for (i = 0; i < le.length; ++i) {
					var index = le[i];
					if (index) {
						var li = listeners[index];
						var scope = li[this.ADJ_SCOPE];
						var ret = li[this.WFN].call(scope, e);
						ok = (ok && ret);
					}
				}
				return ok;
			},
			getLegacyIndex : function(el, sType) {
				for (var i = 0; i < legacyEvents.length; ++i) {
					var le = legacyEvents[i];
					if (le && le[0] == el && le[1] == sType) {
						return i;
					}
				}
				return -1;
			},
			useLegacyEvent : function(el, sType) {
				return ((!el.addEventListener && !el.attachEvent) || (sType == "click" && this.isSafari));
			},
			removeListener : function(el, sType, fn) {
				if (typeof el == "string") {
					el = this.getEl(el);
				} else if (this._isValidCollection(el)) {
					var ok = true;
					for (var i = 0; i < el.length; ++i) {
						ok = (this.removeListener(el[i], sType, fn) && ok);
					}
					return ok;
				}
				var cacheItem = null;
				var index = this._getCacheIndex(el, sType, fn);
				if (index >= 0) {
					cacheItem = listeners[index];
				}
				if (!el || !cacheItem) {
					return false;
				}
				if (el.removeEventListener) {
					el.removeEventListener(sType, cacheItem[this.WFN], false);
				} else if (el.detachEvent) {
					el.detachEvent("on" + sType, cacheItem[this.WFN]);
				}
				delete listeners[index][this.WFN];
				delete listeners[index][this.FN];
				delete listeners[index];
				return true;
			},
			getTarget : function(ev, resolveTextNode) {
				var t = ev.target || ev.srcElement;
				if (resolveTextNode && t && "#text" == t.nodeName) {
					return t.parentNode;
				} else {
					return t;
				}
			},
			getPageX : function(ev) {
				var x = ev.pageX;
				if (!x && 0 !== x) {
					x = ev.clientX || 0;
					if (this.isIE) {
						x += this._getScrollLeft();
					}
				}
				return x;
			},
			getPageY : function(ev) {
				var y = ev.pageY;
				if (!y && 0 !== y) {
					y = ev.clientY || 0;
					if (this.isIE) {
						y += this._getScrollTop();
					}
				}
				return y;
			},
			getRelatedTarget : function(ev) {
				var t = ev.relatedTarget;
				if (!t) {
					if (ev.type == "mouseout") {
						t = ev.toElement;
					} else if (ev.type == "mouseover") {
						t = ev.fromElement;
					}
				}
				return t;
			},
			getTime : function(ev) {
				if (!ev.time) {
					var t = allGetServerTime().getTime();
					try {
						ev.time = t;
					} catch (e) {
						return t;
					}
				}
				return ev.time;
			},
			stopEvent : function(ev) {
				this.stopPropagation(ev);
				this.preventDefault(ev);
			},
			stopPropagation : function(ev) {
				if (ev.stopPropagation) {
					ev.stopPropagation();
				} else {
					ev.cancelBubble = true;
				}
			},
			preventDefault : function(ev) {
				if (ev.preventDefault) {
					ev.preventDefault();
				} else {
					ev.returnValue = false;
				}
			},
			getEvent : function(e) {
				var ev = e || window.event;
				if (!ev) {
					var c = this.getEvent.caller;
					while (c) {
						ev = c.arguments[0];
						if (ev && Event == ev.constructor) {
							break;
						}
						c = c.caller;
					}
				}
				return ev;
			},
			getCharCode : function(ev) {
				return ev.charCode || (ev.type == "keypress") ? ev.keyCode : 0;
			},
			_getCacheIndex : function(el, sType, fn) {
				for (var i = 0; i < listeners.length; ++i) {
					var li = listeners[i];
					if (li && li[this.FN] == fn && li[this.EL] == el
							&& li[this.TYPE] == sType) {
						return i;
					}
				}
				return -1;
			},
			_isValidCollection : function(o) {
				return (o && o.length && typeof o != "string" && !o.tagName
						&& !o.alert && typeof o[0] != "undefined");
			},
			elCache : {},
			getEl : function(id) {
				return document.getElementById(id);
			},
			clearCache : function() {
				for (i in this.elCache) {
					delete this.elCache[i];
				}
			},
			regCE : function(ce) {
				customEvents.push(ce);
			},
			_load : function(e) {
				loadComplete = true;
			},
			_tryPreloadAttach : function() {
				var tryAgain = !loadComplete;
				for (var i = 0; i < delayedListeners.length; ++i) {
					var d = delayedListeners[i];
					if (d) {
						var el = this.getEl(d[this.EL]);
						if (el) {
							this.on(el, d[this.TYPE], d[this.FN],
									d[this.SCOPE], d[this.ADJ_SCOPE]);
							delete delayedListeners[i];
						}
					}
				}
				if (tryAgain) {
					setTimeout("YAHOO.util.Event._tryPreloadAttach()", 50);
				}
			},
			_unload : function(e, me) {
				for (var i = 0; i < unloadListeners.length; ++i) {
					var l = unloadListeners[i];
					if (l) {
						var scope = (l[this.ADJ_SCOPE])
								? l[this.SCOPE]
								: window;
						l[this.FN].call(scope, this.getEvent(e), l[this.SCOPE]);
					}
				}
				if (listeners && listeners.length > 0) {
					for (i = 0; i < listeners.length; ++i) {
						l = listeners[i];
						if (l) {
							this.removeListener(l[this.EL], l[this.TYPE],
									l[this.FN]);
						}
					}
					this.clearCache();
				}
				for (i = 0; i < customEvents.length; ++i) {
					customEvents[i].unsubscribeAll();
					delete customEvents[i];
				}
				for (i = 0; i < legacyEvents.length; ++i) {
					delete legacyEvents[i][0];
					delete legacyEvents[i];
				}
			},
			_getScrollLeft : function() {
				return this._getScroll()[1];
			},
			_getScrollTop : function() {
				return this._getScroll()[0];
			},
			_getScroll : function() {
				var dd = document.documentElement;
				db = document.body;
				if (dd && dd.scrollTop) {
					return [dd.scrollTop, dd.scrollLeft];
				} else if (db) {
					return [db.scrollTop, db.scrollLeft];
				} else {
					return [0, 0];
				}
			}
		};
	}();
	YAHOO.util.Event.on = YAHOO.util.Event.addListener;
	if (document && document.body) {
		YAHOO.util.Event._load();
	} else {
		YAHOO.util.Event.on(window, "load", YAHOO.util.Event._load,
				YAHOO.util.Event, true);
	}
	YAHOO.util.Event.on(window, "unload", YAHOO.util.Event._unload,
			YAHOO.util.Event, true);
	YAHOO.util.Event._tryPreloadAttach();
}