/*
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This file is part of Ext JS 4.2
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Copyright (c) 2011-2013 Sencha Inc
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Contact: http://www.sencha.com/contact
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GNU General Public License Usage
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This file may be used under the terms of the GNU General Public License version 3.0 as
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published by the Free Software Foundation and appearing in the file LICENSE included in the
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packaging of this file.
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Please review the following information to ensure the GNU General Public License version 3.0
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requirements will be met: http://www.gnu.org/copyleft/gpl.html.
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If you are unsure which license is appropriate for your use, please contact the sales department
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at http://www.sencha.com/contact.
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Build date: 2013-05-16 14:36:50 (f9be68accb407158ba2b1be2c226a6ce1f649314)
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*/
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/**
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* An internal Queue class.
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* @private
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*/
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Ext.define('Ext.util.Queue', {
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constructor: function() {
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this.clear();
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},
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add : function(obj) {
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var me = this,
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key = me.getKey(obj);
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if (!me.map[key]) {
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++me.length;
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me.items.push(obj);
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me.map[key] = obj;
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}
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return obj;
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},
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/**
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* Removes all items from the collection.
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*/
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clear : function(){
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var me = this,
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items = me.items;
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me.items = [];
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me.map = {};
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me.length = 0;
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return items;
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},
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contains: function (obj) {
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var key = this.getKey(obj);
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return this.map.hasOwnProperty(key);
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},
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/**
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* Returns the number of items in the collection.
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* @return {Number} the number of items in the collection.
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*/
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getCount : function(){
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return this.length;
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},
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getKey : function(obj){
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return obj.id;
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},
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/**
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* Remove an item from the collection.
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* @param {Object} obj The item to remove.
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* @return {Object} The item removed or false if no item was removed.
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*/
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remove : function(obj){
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var me = this,
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key = me.getKey(obj),
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items = me.items,
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index;
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if (me.map[key]) {
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index = Ext.Array.indexOf(items, obj);
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Ext.Array.erase(items, index, 1);
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delete me.map[key];
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--me.length;
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}
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return obj;
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}
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});
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