/**
 * 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,
	defaulthAlign : '',
	defaultvSpace : 0,
	defaulthSpace : 0,

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

		doptions = { "height" : Reflection.defaultHeight, "opacity" : Reflection.defaultOpacity,
					 "vspace" : Reflection.defaultvSpace, "hspace"  : Reflection.defaulthSpace,
					 "halign" : Reflection.defaulthAlign }
		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;

			/* Fix hyperlinks */
            if(document.all && !window.opera && 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';

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

			d.appendChild(p);

			d.style.margin = options['vspace']+'px ' + ((options['halign'] == "center") ? 'auto' : options['hspace']+'px');

			if (options['halign'] == "left" || options['halign'] == "right")
				if (d.style.styleFloat != undefined) { d.style.styleFloat = options['halign'] }
				else if (d.style.cssFloat != undefined) { d.style.cssFloat = options['halign'] };

			/* Fix Issues with IE ?*/
			d.style.overflow = 'hidden';

			if (document.all && !window.opera) {
				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.appendChild(reflection);
			} else {
				var canvas = document.createElement('canvas');
				if (canvas.getContext) {
					var context = canvas.getContext("2d");

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

					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 vspace = null;
		var hspace = null;
		var halign = 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;
			} else if (classes[j].indexOf("vspace") == 0) {
				var vspace = classes[j].substring(6);
			} else if (classes[j].indexOf("hspace") == 0) {
				var hspace = classes[j].substring(6);
			} else if (classes[j].indexOf("align") == 0) {
				var halign = classes[j].substring(5).toLowerCase();
			}
		}

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

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