text: /*
   * Copyright 2014, Gregg Tavares.
   * 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 Gregg Tavares. 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 THE COPYRIGHT
   * OWNER OR CONTRIBUTORS 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.
   */
  "use strict";
  
  define([], function() {
  
    var requestFullScreen = function(element) {
      if (element.requestFullscreen) {
        element.requestFullscreen();
      } else if (element.msRequestFullscreen) {
        element.msRequestFullscreen();
      } else if (element.webkitRequestFullScreen) {
        element.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
      } else if (element.mozRequestFullScreen) {
        element.mozRequestFullScreen();
      }
    };
  
    var cancelFullScreen = function(/*element*/) {
      if (document.exitFullscreen) {
        document.exitFullscreen();
      } else if (document.msExitFullscreen) {
        document.msExitFullscreen();
      } else if (document.webkitCancelFullScreen) {
        document.webkitCancelFullScreen();
      } else if (document.mozCancelFullScreen) {
        document.mozCancelFullScreen();
      }
    };
  
    var onFullScreenChange = function(element, callback) {
      var isFullScreen = function() {
        return document.fullscreenElement || document.mozFullScreenElement ||
               document.webkitFullscreenElement || document.msFullscreenElement ||
               document.mozFullScreen || document.webkitIsFullScreen;
      };
      document.addEventListener('fullscreenchange', function(/*event*/) {
          callback(isFullScreen());
        });
      element.addEventListener('webkitfullscreenchange', function(/*event*/) {
          callback(isFullScreen());
        });
      document.addEventListener('mozfullscreenchange', function(/*event*/) {
          callback(isFullScreen());
        });
    };
  
    return {
      requestFullScreen: requestFullScreen,
      cancelFullScreen: cancelFullScreen,
      onFullScreenChange: onFullScreenChange,
    };
  });
  