/**
 * 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 )
		{
			alert( 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(); }