text: /* ***** BEGIN LICENSE BLOCK *****
   * Distributed under the BSD license:
   *
   * Copyright (c) 2010, Ajax.org B.V.
   * All rights reserved.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in the
   *       documentation and/or other materials provided with the distribution.
   *     * Neither the name of Ajax.org B.V. nor the
   *       names of its contributors may be used to endorse or promote products
   *       derived from this software without specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * ***** END LICENSE BLOCK ***** */
  
  define(function (require, exports, module) {
      "use strict";
  
      var event = require("./lib/event");
  
      /**
       *
       *
       * Batches changes (that force something to be redrawn) in the background.
       * @class RenderLoop
       **/
  
  
      var RenderLoop = function (onRender, win) {
          this.onRender = onRender;
          this.pending = false;
          this.changes = 0;
          this.window = win || window;
      };
  
      (function () {
  
  
          this.schedule = function (change) {
              //this.onRender(change);
              //return;
              this.changes = this.changes | change;
              if (!this.pending && this.changes) {
                  this.pending = true;
                  var _self = this;
                  event.nextFrame(function () {
                      _self.pending = false;
                      var changes;
                      while (changes = _self.changes) {
                          _self.changes = 0;
                          _self.onRender(changes);
                      }
                  }, this.window);
              }
          };
  
      }).call(RenderLoop.prototype);
  
      exports.RenderLoop = RenderLoop;
  });
  