[1575] | 1 | /*
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| 2 | * FCKeditor - The text editor for Internet - http://www.fckeditor.net
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| 3 | * Copyright (C) 2003-2009 Frederico Caldeira Knabben
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| 4 | *
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| 5 | * == BEGIN LICENSE ==
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| 6 | *
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| 7 | * Licensed under the terms of any of the following licenses at your
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| 8 | * choice:
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| 9 | *
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| 10 | * - GNU General Public License Version 2 or later (the "GPL")
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| 11 | * http://www.gnu.org/licenses/gpl.html
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| 12 | *
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| 13 | * - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
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| 14 | * http://www.gnu.org/licenses/lgpl.html
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| 15 | *
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| 16 | * - Mozilla Public License Version 1.1 or later (the "MPL")
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| 17 | * http://www.mozilla.org/MPL/MPL-1.1.html
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| 18 | *
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| 19 | * == END LICENSE ==
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| 20 | *
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| 21 | * Preload a list of images, firing an event when complete.
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| 22 | */
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| 23 |
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| 24 | var FCKImagePreloader = function()
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| 25 | {
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| 26 | this._Images = new Array() ;
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| 27 | }
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| 28 |
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| 29 | FCKImagePreloader.prototype =
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| 30 | {
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| 31 | AddImages : function( images )
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| 32 | {
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| 33 | if ( typeof( images ) == 'string' )
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| 34 | images = images.split( ';' ) ;
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| 35 |
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| 36 | this._Images = this._Images.concat( images ) ;
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| 37 | },
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| 38 |
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| 39 | Start : function()
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| 40 | {
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| 41 | var aImages = this._Images ;
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| 42 | this._PreloadCount = aImages.length ;
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| 43 |
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| 44 | for ( var i = 0 ; i < aImages.length ; i++ )
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| 45 | {
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| 46 | var eImg = document.createElement( 'img' ) ;
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| 47 | FCKTools.AddEventListenerEx( eImg, 'load', _FCKImagePreloader_OnImage, this ) ;
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| 48 | FCKTools.AddEventListenerEx( eImg, 'error', _FCKImagePreloader_OnImage, this ) ;
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| 49 | eImg.src = aImages[i] ;
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| 50 |
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| 51 | _FCKImagePreloader_ImageCache.push( eImg ) ;
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| 52 | }
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| 53 | }
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| 54 | };
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| 55 |
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| 56 | // All preloaded images must be placed in a global array, otherwise the preload
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| 57 | // magic will not happen.
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| 58 | var _FCKImagePreloader_ImageCache = new Array() ;
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| 59 |
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| 60 | function _FCKImagePreloader_OnImage( ev, imagePreloader )
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| 61 | {
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| 62 | if ( (--imagePreloader._PreloadCount) == 0 && imagePreloader.OnComplete )
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| 63 | imagePreloader.OnComplete() ;
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| 64 | }
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