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/*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 ("License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.zimbra.com/license
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is: Zimbra AJAX Toolkit.
*
* The Initial Developer of the Original Code is Zimbra, Inc.
* Portions created by Zimbra are Copyright (C) 2005 Zimbra, Inc.
* All Rights Reserved.
*
* Contributor(s):
*
* ***** END LICENSE BLOCK *****
*/


function AjxEventMgr() {
	this._listeners = new Object();
}

AjxEventMgr.prototype.toString = 
function() {
	return "AjxEventMgr";
}

AjxEventMgr.prototype.addListener =
function(eventType, listener) {
	var lv = this._listeners[eventType];
	if (lv == null) {
		lv = this._listeners[eventType] = new AjxVector();
	}         	 
	if (!lv.contains(listener)) {
		if (this._notifyingListeners) {
			lv = this._listeners[eventType] = lv.clone();
		}
		lv.add(listener);
		return true;
	}
	return false;
}

AjxEventMgr.prototype.notifyListeners =
function(eventType, event) {
	this._notifyingListeners = true;
	var lv = this._listeners[eventType];
	if (lv != null) {
		var a = lv.getArray();
		var s = lv.size();
		var retVal = null;
		var c = null;
		for (var i = 0; i < s; i++) {
			c = a[i];
			retVal = c.handleEvent ? c.handleEvent(event) : c(event);
			if (retVal === false) {
				break;
			}
		}
	}	
	this._notifyingListeners = false;
}

AjxEventMgr.prototype.isListenerRegistered =
function(eventType) {
	var lv = this._listeners[eventType];
	return (lv != null && lv.size() > 0);
}

AjxEventMgr.prototype.removeListener = 
function(eventType, listener) {
	var lv = this._listeners[eventType];
	if (lv != null) {
		if (this._notifyingListeners) {
			lv = this._listeners[eventType] = lv.clone();
		}
		lv.remove(listener);
		return true;
	}
	return false;
}

AjxEventMgr.prototype.removeAll = 
function(eventType) {
	var lv = this._listeners[eventType];
	if (lv != null) {
		if (this._notifyingListeners) {
			lv = this._listeners[eventType] = lv.clone();
		}
		lv.removeAll();
		return true;
	}
	return false;
}