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

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