/**
* reflection.js v2.0
* http://cow.neondragon.net/stuff/reflection/
* Freely distributable under MIT-style license.
*/

/* From prototype.js */
if (!document.myGetElementsByClassName)
{
   document.myGetElementsByClassName = function(className)
   {
      var children = document.getElementsByTagName('*') || document.all;
      var elements = new Array();

      for (var i = 0; i < children.length; i++)
      {
         var child = children[i];
         var classNames = child.className.split(' ');
         for (var j = 0; j < classNames.length; j++)
         {
            if (classNames[j] == className)
            {
               elements.push(child);
               break;
            }
         }
      }
      return elements;
   }
}

var Reflection = {
   defaultHeight: 0.5,
   defaultOpacity: 0.5,

   add: function(image, options)
   {
      Reflection.remove(image);

      doptions = { "height": Reflection.defaultHeight, "opacity": Reflection.defaultOpacity }
      if (options)
      {
         for (var i in doptions)
         {
            if (!options[i])
            {
               options[i] = doptions[i];
            }
         }
      }
      else
      {
         options = doptions;
      }

      try
      {
         var img = image;
         var imgDiv = document.createElement('div');

         var classes = img.className.split(' ');
         var newClasses = '';
         for (j = 0; j < classes.length; j++)
         {
            if (classes[j] != "reflect")
            {
               if (newClasses)
               {
                  newClasses += ' '
               }

               newClasses += classes[j];
            }
         }

         var reflectionWidth = img.width;
         var reflectionHeight = Math.floor(img.height * options['height']);
         var divHeight = Math.floor(img.height * (1 + options['height']));

         //if (document.all && !window.opera) {
         //if (false)
         if (window.navigator.userAgent.indexOf("MSIE") > -1)
         {
            /* Fix hyperlinks */
            if (img.parentElement.tagName == 'A')
            {
               var d = document.createElement('a');
               d.href = img.parentElement.href;
            }

            /* Copy original image's classes & styles to div */
            imgDiv.className = newClasses;
            img.className = 'reflected';

            imgDiv.style.cssText = img.style.cssText;
            img.style.cssText = 'vertical-align: bottom';

            var reflection = document.createElement('img');
            reflection.src = img.src;
            reflection.style.width = reflectionWidth + 'px';
            reflection.style.display = 'block';
            //reflection.style.height = img.height + 'px';
            reflection.style.height = reflectionHeight + 'px';

            reflection.style.marginBottom = "-" + (img.height - reflectionHeight) + 'px';
            reflection.style.filter = 'flipv progid:DXImageTransform.Microsoft.Alpha(opacity=' +
                                 (options['opacity'] * 100) + ', style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy=' +
                                 (/*options['height'] */ 100) + ')';

            imgDiv.style.width = reflectionWidth + 'px';
            imgDiv.style.height = divHeight + 'px';
            img.parentNode.replaceChild(imgDiv, img);

            imgDiv.appendChild(img);
            imgDiv.appendChild(reflection);
         }
         else
         {
            var canvas = document.createElement('canvas');
            if (canvas.getContext)
            {
               /* Copy original image's classes & styles to div */
               imgDiv.className = newClasses;
               img.className = 'reflected';

               imgDiv.style.cssText = img.style.cssText;
               img.style.cssText = 'vertical-align: bottom';

               var context = canvas.getContext("2d");

               canvas.style.height = reflectionHeight + 'px';
               canvas.style.width = reflectionWidth + 'px';
               canvas.height = reflectionHeight;
               canvas.width = reflectionWidth;

               imgDiv.style.width = reflectionWidth + 'px';
               imgDiv.style.height = divHeight + 'px';
               img.parentNode.replaceChild(imgDiv, img);

               imgDiv.appendChild(img);
               imgDiv.appendChild(canvas);

               context.save();

               context.translate(0, image.height - 1);
               context.scale(1, -1);

               context.drawImage(image, 0, 0, reflectionWidth, image.height);

               context.restore();

               context.globalCompositeOperation = "destination-out";
               var gradient = context.createLinearGradient(0, 0, 0, reflectionHeight);

               gradient.addColorStop(1, "rgba(255, 255, 255, 1.0)");
               gradient.addColorStop(0, "rgba(255, 255, 255, " + (1 - options['opacity']) + ")");

               context.fillStyle = gradient;
               context.rect(0, 0, reflectionWidth, reflectionHeight * 2);
               context.fill();
            }
         }
      }
      catch (e)
      {
      }
   },

   remove: function(image)
   {
      if (image.className == "reflected")
      {
         image.className = image.parentNode.className;
         image.parentNode.parentNode.replaceChild(image, image.parentNode);
      }
   }
}

function addReflections()
{
   var rimages = document.myGetElementsByClassName('reflect');
   for (i = 0; i < rimages.length; i++)
   {
      if (window.navigator.userAgent.indexOf("MSIE") > -1 && rimages[i].className.indexOf("not4ie") > -1) { continue; }

      var rheight = null;
      var ropacity = null;

      var classes = rimages[i].className.split(' ');
      for (j = 0; j < classes.length; j++)
      {
         if (classes[j].indexOf("rheight") == 0)
         {
            var rheight = classes[j].substring(7) / 100;
         } else if (classes[j].indexOf("ropacity") == 0)
         {
            var ropacity = classes[j].substring(8) / 100;
         }
      }

      Reflection.add(rimages[i], { height: rheight, opacity: ropacity });
   }
}

var previousOnload = window.onload;
window.onload = function() { if (previousOnload) previousOnload(); addReflections(); }