/**
 * 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 d = document.createElement('div');
         var p = image;
         
         var classes = p.className.split(' ');
         var newClasses = '';
         for (j=0;j<classes.length;j++) {
            if (classes[j] != "reflect") {
               if (newClasses) {
                  newClasses += ' '
               }
               
               newClasses += classes[j];
            }
         }

         var reflectionHeight = Math.floor(p.height*options['height']);
         var divHeight = Math.floor(p.height*(1+options['height']));
         
         var reflectionWidth = p.width;
         
         if (document.all && !window.opera) {
            /* Fix hyperlinks */
                if(p.parentElement.tagName == 'A') {
                   var d = document.createElement('a');
                   d.href = p.parentElement.href;
                }  
                    
            /* Copy original image's classes & styles to div */
            d.className = newClasses;
            p.className = 'reflected';
            
            d.style.cssText = p.style.cssText;
            p.style.cssText = 'vertical-align: bottom';
         
            var reflection = document.createElement('img');
            reflection.src = p.src;
            reflection.style.width = reflectionWidth+'px';
            reflection.style.display = 'block';
            reflection.style.height = p.height+"px";
            
            reflection.style.marginBottom = "-"+(p.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)+')';
            
            d.style.width = reflectionWidth+'px';
            d.style.height = divHeight+'px';
            p.parentNode.replaceChild(d, p);
            
            d.appendChild(p);
            d.appendChild(reflection);
         } else {
            var canvas = document.createElement('canvas');
            if (canvas.getContext) {
               /* Copy original image's classes & styles to div */
               d.className = newClasses;
               p.className = 'reflected';
               
               d.style.cssText = p.style.cssText;
               p.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;
               
               d.style.width = reflectionWidth+'px';
               d.style.height = divHeight+'px';
               p.parentNode.replaceChild(d, p);
               
               d.appendChild(p);
               d.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++) {
      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(); }