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   1  /*
   2   * jQuery Color Animations
   3   * Copyright 2007 John Resig
   4   * Released under the MIT and GPL licenses.
   5   */
   6  
   7  (function(jQuery){
   8  
   9      // We override the animation for all of these color styles
  10      jQuery.each(['backgroundColor', 'borderBottomColor', 'borderLeftColor', 'borderRightColor', 'borderTopColor', 'color', 'outlineColor'], function(i,attr){
  11          jQuery.fx.step[attr] = function(fx){
  12              if ( fx.state == 0 ) {
  13                  fx.start = getColor( fx.elem, attr );
  14                  fx.end = getRGB( fx.end );
  15              }
  16  
  17              fx.elem.style[attr] = "rgb(" + [
  18                  Math.max(Math.min( parseInt((fx.pos * (fx.end[0] - fx.start[0])) + fx.start[0]), 255), 0),
  19                  Math.max(Math.min( parseInt((fx.pos * (fx.end[1] - fx.start[1])) + fx.start[1]), 255), 0),
  20                  Math.max(Math.min( parseInt((fx.pos * (fx.end[2] - fx.start[2])) + fx.start[2]), 255), 0)
  21              ].join(",") + ")";
  22          }
  23      });
  24  
  25      // Color Conversion functions from highlightFade
  26      // By Blair Mitchelmore
  27      // http://jquery.offput.ca/highlightFade/
  28  
  29      // Parse strings looking for color tuples [255,255,255]
  30      function getRGB(color) {
  31          var result;
  32  
  33          // Check if we're already dealing with an array of colors
  34          if ( color && color.constructor == Array && color.length == 3 )
  35              return color;
  36  
  37          // Look for rgb(num,num,num)
  38          if (result = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(color))
  39              return [parseInt(result[1]), parseInt(result[2]), parseInt(result[3])];
  40  
  41          // Look for rgb(num%,num%,num%)
  42          if (result = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(color))
  43              return [parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55];
  44  
  45          // Look for #a0b1c2
  46          if (result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(color))
  47              return [parseInt(result[1],16), parseInt(result[2],16), parseInt(result[3],16)];
  48  
  49          // Look for #fff
  50          if (result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(color))
  51              return [parseInt(result[1]+result[1],16), parseInt(result[2]+result[2],16), parseInt(result[3]+result[3],16)];
  52  
  53          // Look for rgba(0, 0, 0, 0) == transparent in Safari 3
  54          if (result = /rgba\(0, 0, 0, 0\)/.exec(color))
  55              return colors['transparent']
  56  
  57          // Otherwise, we're most likely dealing with a named color
  58          return colors[jQuery.trim(color).toLowerCase()];
  59      }
  60  
  61      function getColor(elem, attr) {
  62          var color;
  63  
  64          do {
  65              color = jQuery.curCSS(elem, attr);
  66  
  67              // Keep going until we find an element that has color, or we hit the body
  68              if ( color != '' && color != 'transparent' || jQuery.nodeName(elem, "body") )
  69                  break;
  70  
  71              attr = "backgroundColor";
  72          } while ( elem = elem.parentNode );
  73  
  74          return getRGB(color);
  75      };
  76  
  77      // Some named colors to work with
  78      // From Interface by Stefan Petre
  79      // http://interface.eyecon.ro/
  80  
  81      var colors = {
  82          aqua:[0,255,255],
  83          azure:[240,255,255],
  84          beige:[245,245,220],
  85          black:[0,0,0],
  86          blue:[0,0,255],
  87          brown:[165,42,42],
  88          cyan:[0,255,255],
  89          darkblue:[0,0,139],
  90          darkcyan:[0,139,139],
  91          darkgrey:[169,169,169],
  92          darkgreen:[0,100,0],
  93          darkkhaki:[189,183,107],
  94          darkmagenta:[139,0,139],
  95          darkolivegreen:[85,107,47],
  96          darkorange:[255,140,0],
  97          darkorchid:[153,50,204],
  98          darkred:[139,0,0],
  99          darksalmon:[233,150,122],
 100          darkviolet:[148,0,211],
 101          fuchsia:[255,0,255],
 102          gold:[255,215,0],
 103          green:[0,128,0],
 104          indigo:[75,0,130],
 105          khaki:[240,230,140],
 106          lightblue:[173,216,230],
 107          lightcyan:[224,255,255],
 108          lightgreen:[144,238,144],
 109          lightgrey:[211,211,211],
 110          lightpink:[255,182,193],
 111          lightyellow:[255,255,224],
 112          lime:[0,255,0],
 113          magenta:[255,0,255],
 114          maroon:[128,0,0],
 115          navy:[0,0,128],
 116          olive:[128,128,0],
 117          orange:[255,165,0],
 118          pink:[255,192,203],
 119          purple:[128,0,128],
 120          violet:[128,0,128],
 121          red:[255,0,0],
 122          silver:[192,192,192],
 123          white:[255,255,255],
 124          yellow:[255,255,0],
 125          transparent: [255,255,255]
 126      };
 127  
 128  })(jQuery);