/*
	reflection.js for mootools v1.0
	by Christophe Beyls (http://www.digitalia.be) - MIT-style license
*/

var Reflection = {

	add: function(img, options) {
		img = $(img);
		if(img.getTag() != 'img') return;
		img.preload = new Image();
		img.preload.onload = Reflection.reflect.pass([img, options]);
		img.preload.src = img.src;
	},

	remove: function(img) {
		img = $(img);
		if(img.preload) img.preload.onload = null;
		if((img.getTag() == 'img') && (img.className == 'reflected')) {
			img.className = img.parentNode.className;
			img.style.cssText = img.backupStyle;
			img.parentNode.replaceWith(img);
		}
	},

	reflect: function(img, options) {
		options = Object.extend({
			height: 0.33,
			opacity: 0.5
		}, options || {});
		
		Reflection.remove(img);
		var canvas, canvasHeight = Math.floor(img.height*options.height);
		
		if(window.ActiveXObject) {
			canvas = new Element('img').setProperty('src', img.src).setStyles({
				width: img.width+'px',
				marginBottom: '-'+(img.height-canvasHeight)+'px',
				filter: 'flipv progid:DXImageTransform.Microsoft.Alpha(opacity='+(options.opacity*100)+', style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy='+(options.height*100)+')'
			});
		} else {
			canvas = new Element('canvas').setStyles({width: img.width+'px', height: canvasHeight+'px'});
			if (!canvas.getContext) return;
		}
		
		var div = new Element('div').injectAfter(img).adopt(img).adopt(canvas);
		div.className = img.className;
		div.style.cssText = img.backupStyle = img.style.cssText;
		div.removeClassName('reflect').setStyles({width: img.width+'px', height: (canvasHeight+img.height)+'px'});
		img.style.cssText = 'vertical-align: bottom';
		img.className = 'reflected';
		if(window.ActiveXObject) return;
		
		var context = canvas.setProperties({width: img.width, height: canvasHeight}).getContext('2d');
		context.save();
		context.translate(0, img.height-1);
		context.scale(1, -1);
		context.drawImage(img, 0, 0, img.width, img.height);
		context.restore();
		context.globalCompositeOperation = 'destination-out';
		var gradient = context.createLinearGradient(0, 0, 0, canvasHeight);
		gradient.addColorStop(0, 'rgba(255, 255, 255, '+(1-options.opacity)+')');
		gradient.addColorStop(1, 'rgba(255, 255, 255, 1.0)');
		context.fillStyle = gradient;
		context.rect(0, 0, img.width, canvasHeight);
		context.fill();
	},

	addFromClass: function() {
		$A(document.getElementsByTagName('img')).each(function(img){
			if($(img).hasClass('reflect')) Reflection.add(img);
		});
	}
};

Element.extend({
	addReflection: function(options) { Reflection.add(this, options); return this; },
	removeReflection: function(options) { Reflection.remove(this, options); return this; }
});

Window.onDomReady(Reflection.addFromClass);