/**
 * 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(); }