[Sommaire] [Imprimer]

   1  /**
   2   * reflection.js v1.5
   3   *
   4   * Contributors: Cow http://cow.neondragon.net
   5   *               Gfx http://www.jroller.com/page/gfx/
   6   *               Sitharus http://www.sitharus.com
   7   *               Andreas Linde http://www.andreaslinde.de
   8   *               Tralala, coder @ http://www.vbulletin.org
   9   *
  10   * Freely distributable under MIT-style license.
  11   */
  12   
  13  /* From prototype.js */
  14  document.getElementsByClassName = function(className) {
  15      var children = document.getElementsByTagName('*') || document.all;
  16      var elements = new Array();
  17    
  18      for (var i = 0; i < children.length; i++) {
  19          var child = children[i];
  20          var classNames = child.className.split(' ');
  21          for (var j = 0; j < classNames.length; j++) {
  22              if (classNames[j] == className) {
  23                  elements.push(child);
  24                  break;
  25              }
  26          }
  27      }
  28      return elements;
  29  }
  30  
  31  var Reflection = {
  32      defaultHeight : 0.5,
  33      defaultOpacity: 0.5,
  34      
  35      add: function(image, options) {
  36          Reflection.remove(image);
  37          
  38          doptions = { "height" : Reflection.defaultHeight, "opacity" : Reflection.defaultOpacity }
  39          if (options) {
  40              for (var i in doptions) {
  41                  if (!options[i]) {
  42                      options[i] = doptions[i];
  43                  }
  44              }
  45          } else {
  46              options = doptions;
  47          }
  48      
  49          try {
  50              var d = document.createElement('div');
  51              var p = image;
  52              
  53              var classes = p.className.split(' ');
  54              var newClasses = '';
  55              for (j=0;j<classes.length;j++) {
  56                  if (classes[j] != "reflect") {
  57                      if (newClasses) {
  58                          newClasses += ' '
  59                      }
  60                      
  61                      newClasses += classes[j];
  62                  }
  63              }
  64  
  65              var reflectionHeight = Math.floor(p.height*options['height']);
  66              var divHeight = Math.floor(p.height*(1+options['height']));
  67              
  68              var reflectionWidth = p.width;
  69      
  70              /* Copy original image's classes & styles to div */
  71              d.className = newClasses;
  72              p.className = 'reflected';
  73              
  74              d.style.cssText = p.style.cssText;
  75              p.style.cssText = ' ';
  76              
  77              if (document.all && !window.opera) {
  78                  var reflection = document.createElement('img');
  79                  reflection.src = p.src;
  80                  reflection.style.width = reflectionWidth+'px';
  81                  
  82                  reflection.style.marginBottom = "-"+(p.height-reflectionHeight)+'px';
  83                  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)+')';
  84                  
  85                  d.style.width = reflectionWidth+'px';
  86                  d.style.height = divHeight+'px';
  87                  p.parentNode.replaceChild(d, p);
  88                  
  89                  d.appendChild(p);
  90                  d.appendChild(reflection);
  91              } else {
  92                  var canvas = document.createElement('canvas');
  93                  var context = canvas.getContext("2d");
  94              
  95                  canvas.style.height = reflectionHeight+'px';
  96                  canvas.style.width = reflectionWidth+'px';
  97                  canvas.height = reflectionHeight;
  98                  canvas.width = reflectionWidth;
  99                  
 100                  d.style.width = reflectionWidth+'px';
 101                  d.style.height = divHeight+'px';
 102                  p.parentNode.replaceChild(d, p);
 103                  
 104                  d.appendChild(p);
 105                  d.appendChild(canvas);
 106                  
 107                  context.save();
 108                  
 109                  context.translate(0,image.height-1);
 110                  context.scale(1,-1);
 111                  
 112                  context.drawImage(image, 0, 0, reflectionWidth, image.height);
 113  
 114                  context.restore();
 115                  
 116                  context.globalCompositeOperation = "destination-out";
 117                  var gradient = context.createLinearGradient(0, 0, 0, reflectionHeight);
 118                  
 119                  gradient.addColorStop(1, "rgba(255, 255, 255, 1.0)");
 120                  gradient.addColorStop(0, "rgba(255, 255, 255, "+(1-options['opacity'])+")");
 121      
 122                  context.fillStyle = gradient;
 123                  if (navigator.appVersion.indexOf('WebKit') != -1) {
 124                      context.fill();
 125                  } else {
 126                      context.fillRect(0, 0, reflectionWidth, reflectionHeight*2);
 127                  }
 128              }
 129          } catch (e) {
 130          }
 131      },
 132      
 133      remove : function(image) {
 134          if (image.className == "reflected") {
 135              image.className = image.parentNode.className;
 136              image.parentNode.parentNode.replaceChild(image, image.parentNode);
 137          }
 138      }
 139  }
 140  
 141  function addReflections() {
 142      var rimages = document.getElementsByClassName('reflect');
 143      for (i=0;i<rimages.length;i++) {
 144          var rheight = null;
 145          var ropacity = null;
 146          
 147          var classes = rimages[i].className.split(' ');
 148          for (j=0;j<classes.length;j++) {
 149              if (classes[j].indexOf("rheight") == 0) {
 150                  var rheight = classes[j].substring(7)/100;
 151              } else if (classes[j].indexOf("ropacity") == 0) {
 152                  var ropacity = classes[j].substring(8)/100;
 153              }
 154          }
 155          
 156          Reflection.add(rimages[i], { height: rheight, opacity : ropacity});
 157      }
 158  }
 159  
 160  var previousOnload = window.onload;
 161  window.onload = function () { if(previousOnload) previousOnload(); addReflections(); }