add extjs 6.0.1 sources

[extjs.git] / extjs / classic / classic / src / util / Queue.js

/**\r
 * An internal Queue class.\r
 * @private\r
 */\r
Ext.define('Ext.util.Queue', {\r
\r
    constructor: function() {\r
        this.clear();\r
    },\r
\r
    add : function(obj) {\r
        var me = this,\r
            key = me.getKey(obj);\r
\r
        if (!me.map[key]) {\r
            ++me.length;\r
            me.items.push(obj);\r
            me.map[key] = obj;\r
        }\r
\r
        return obj;\r
    },\r
\r
    /**\r
     * Removes all items from the collection.\r
     */\r
    clear : function(){\r
        var me = this,\r
            items = me.items;\r
\r
        me.items = [];\r
        me.map = {};\r
        me.length = 0;\r
\r
        return items;\r
    },\r
\r
    contains: function (obj) {\r
        var key = this.getKey(obj);\r
\r
        return this.map.hasOwnProperty(key);\r
    },\r
\r
    /**\r
     * Returns the number of items in the collection.\r
     * @return {Number} the number of items in the collection.\r
     */\r
    getCount : function(){\r
        return this.length;\r
    },\r
\r
    getKey : function(obj){\r
         return obj.id;\r
    },\r
\r
    /**\r
     * Remove an item from the collection.\r
     * @param {Object} obj The item to remove.\r
     * @return {Object} The item removed or false if no item was removed.\r
     */\r
    remove : function(obj){\r
        var me = this,\r
            key = me.getKey(obj),\r
            items = me.items,\r
            index;\r
\r
        if (me.map[key]) {\r
            index = Ext.Array.indexOf(items, obj);\r
            Ext.Array.erase(items, index, 1);\r
            delete me.map[key];\r
            --me.length;\r
        }\r
\r
        return obj;\r
    }\r
});