0.6.x/js/05_util/03_XUtilImage.js

   1 \r
   2 var X_Util_Image_actualSize = {};\r
   3 \r
   4 /**\r
   5  * ユーティリティ関数とユーティリティクラス\r
   6  * @namespace X.Util.Image\r
   7  */\r
   8 X[ 'Util' ][ 'Image' ] = {      \r
   9         'getActualDimension' : X_Util_Image_getActualDimension\r
  10         \r
  11         // Alpha Image, data uri ong ...\r
  12 };\r
  13 \r
  14 /*\r
  15  * Opacity不可 NetFront3.4\r
  16  */\r
  17 \r
  18 /**\r
  19  * <p>画像の実際のサイズを返します。\r
  20  * <p>original\r
  21  * <p> LICENSE: MIT\r
  22  * <p> AUTHOR: uupaa.js@gmail.com\r
  23  * @alias X.Util.Image.getActualDimension\r
  24  * @param {Node|ImageElement|string}\r
  25  * @return {array.<number>}\r
  26  */\r
  27 function X_Util_Image_getActualDimension( XnodeOrImageElemOrSrc ){\r
  28         var xnode, img, remove, ret, run, memW, memH, w, h;\r
  29 \r
  30         if( X_Type_isString( XnodeOrImageElemOrSrc ) ){\r
  31                 if( ret = X_Util_Image_actualSize[ X_URL_toAbsolutePath( XnodeOrImageElemOrSrc ) ] ) return ret;\r
  32                 \r
  33                 xnode = X_Node_systemNode[ 'create' ](\r
  34                         'img',\r
  35                         {\r
  36                                 src : XnodeOrImageElemOrSrc\r
  37                         },\r
  38                         {\r
  39                                 position   : 'absolute'\r
  40                         }\r
  41                 );\r
  42                 X_Node_startUpdate();\r
  43                 img    = X_UA_DOM.IE4 ? X_Node__ie4getRawNode( xnode ) : xnode[ '_rawObject' ];\r
  44                 remove = true;\r
  45         } else {\r
  46                 if( XnodeOrImageElemOrSrc.constructor === Node ){\r
  47                         xnode = XnodeOrImageElemOrSrc;\r
  48                         img   = X_UA_DOM.IE4 ? X_Node__ie4getRawNode( xnode )[ '_rawObject' ] : xnode[ '_rawObject' ];\r
  49                 } else\r
  50                 if( X_Type_isHTMLElement( XnodeOrImageElemOrSrc ) ){\r
  51                         img = XnodeOrImageElemOrSrc;\r
  52                 } else\r
  53                 if( XnodeOrImageElemOrSrc.constructor === X_EventDispatcher && X_Type_isImage( XnodeOrImageElemOrSrc[ '_rawObject' ] ) ){\r
  54                         xnode = XnodeOrImageElemOrSrc;\r
  55                         img   = xnode[ '_rawObject' ];\r
  56                 } else {\r
  57                         return;\r
  58                 };\r
  59                 if( ret = X_Util_Image_actualSize[ img.src ] ) return ret;\r
  60         };\r
  61 \r
  62         // for Firefox, Safari, Google Chrome\r
  63         if( img.naturalWidth ) return [ img.naturalWidth, img.naturalHeight ];\r
  64 \r
  65         if( 5 <= X_UA[ 'IE' ] ){// for IE\r
  66                 run  = img.runtimeStyle;\r
  67                 memW = run.width;\r
  68                 memH = run.height;\r
  69 \r
  70                 // keep runtimeStyle\r
  71                 run.width  = 'auto';\r
  72                 // override\r
  73                 run.height = 'auto';\r
  74                 w = img.width;\r
  75                 h = img.height;\r
  76                 run.width  = memW;\r
  77                 // restore\r
  78                 run.height = memH;\r
  79         } else {// for Opera and Other\r
  80                 \r
  81                 memW = w = img.width;\r
  82                 memH = h = img.height;\r
  83                 \r
  84                 if( img.removeAttribute ){ // Safari1.3 の Image は removeAttribute がない\r
  85                         // keep current style\r
  86                         img.removeAttribute( 'width' );\r
  87                         img.removeAttribute( 'height' );\r
  88                         \r
  89                         w = img.width;\r
  90                         h = img.height;\r
  91                         \r
  92                         // restore\r
  93                         img.width  = memW;\r
  94                         img.height = memH;\r
  95                 };\r
  96         };\r
  97         \r
  98         ret = X_Util_Image_actualSize[ img.src ] = [ w, h ];\r
  99         \r
 100         remove && xnode[ 'kill' ]();\r
 101         \r
 102         return ret;\r
 103 };\r
 104 \r
 105 \r