_source/core/imagecacher.js

   1 /*\r
   2 Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.\r
   3 For licensing, see LICENSE.html or http://ckeditor.com/license\r
   4 */\r
   5 \r
   6 (function()\r
   7 {\r
   8         var loaded = {};\r
   9 \r
  10         var loadImage = function( image, callback )\r
  11         {\r
  12                 var doCallback = function()\r
  13                         {\r
  14                                 img.removeAllListeners();\r
  15                                 loaded[ image ] = 1;\r
  16                                 callback();\r
  17                         };\r
  18 \r
  19                 var img = new CKEDITOR.dom.element( 'img' );\r
  20                 img.on( 'load', doCallback );\r
  21                 img.on( 'error', doCallback );\r
  22                 img.setAttribute( 'src', image );\r
  23         };\r
  24 \r
  25         /**\r
  26          * Load images into the browser cache.\r
  27          * @namespace\r
  28          * @example\r
  29          */\r
  30         CKEDITOR.imageCacher =\r
  31         {\r
  32                 /**\r
  33                  * Loads one or more images.\r
  34                  * @param {Array} images The URLs for the images to be loaded.\r
  35                  * @param {Function} callback The function to be called once all images\r
  36                  *              are loaded.\r
  37                  */\r
  38                 load : function( images, callback )\r
  39                 {\r
  40                         var pendingCount = images.length;\r
  41 \r
  42                         var checkPending = function()\r
  43                         {\r
  44                                 if ( --pendingCount === 0 )\r
  45                                         callback();\r
  46                         };\r
  47 \r
  48                         for ( var i = 0 ; i < images.length ; i++ )\r
  49                         {\r
  50                                 var image = images[ i ];\r
  51 \r
  52                                 if ( loaded[ image ] )\r
  53                                         checkPending();\r
  54                                 else\r
  55                                         loadImage( image, checkPending );\r
  56                         }\r
  57                 }\r
  58         };\r
  59 })();\r