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