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   1  /*
   2  YUI 3.17.2 (build 9c3c78e)
   3  Copyright 2014 Yahoo! Inc. All rights reserved.
   4  Licensed under the BSD License.
   5  http://yuilibrary.com/license/
   6  */
   7  
   8  YUI.add('queue-promote', function (Y, NAME) {
   9  
  10  /**
  11   * Adds methods promote, remove, and indexOf to Queue instances.
  12   *
  13   * @module queue-promote
  14   * @for Queue
  15   */
  16  
  17  Y.mix(Y.Queue.prototype, {
  18      /**
  19       * Returns the current index in the queue of the specified item
  20       *
  21       * @method indexOf
  22       * @param needle {MIXED} the item to search for
  23       * @return {Number} the index of the item or -1 if not found
  24       */
  25      indexOf : function (callback) {
  26          return Y.Array.indexOf(this._q, callback);
  27      },
  28  
  29      /**
  30       * Moves the referenced item to the head of the queue
  31       *
  32       * @method promote
  33       * @param item {MIXED} an item in the queue
  34       */
  35      promote : function (callback) {
  36          var index = this.indexOf(callback);
  37  
  38          if (index > -1) {
  39              this._q.unshift(this._q.splice(index,1)[0]);
  40          }
  41      },
  42  
  43      /**
  44       * Removes the referenced item from the queue
  45       *
  46       * @method remove
  47       * @param item {MIXED} an item in the queue
  48       */
  49      remove : function (callback) {
  50          var index = this.indexOf(callback);
  51  
  52          if (index > -1) {
  53              this._q.splice(index,1);
  54          }
  55      }
  56  
  57  });
  58  
  59  
  60  }, '3.17.2', {"requires": ["yui-base"]});