//by Valerio Proietti (http://mad4milk.net). MIT-style license.
//moo.fx.pack.js - depends on prototype.js or prototype.lite.js + moo.fx.js
//version 2.0

Fx.Scroll = Class.create();
Fx.Scroll.prototype = Object.extend(new Fx.Base(), {

	initialize: function(el, options) {
		this.element = $(el);
		this.setOptions(options);
		this.element.style.overflow = 'hidden';
	},
	
	down: function(){
		return this.custom(this.element.scrollTop, this.element.scrollHeight-this.element.offsetHeight);
	},
	
	up: function(){
		return this.custom(this.element.scrollTop, 0);
	},

	increase: function(){
		this.element.scrollTop = this.now;
	}

});

Fx.ScrollWindow = Class.create();
Fx.ScrollWindow.prototype = Object.extend(new Fx.Base(), {
	initialize: function(options){
		this.setOptions(options);
		this.now = [];
		var b = document.body;
		var stop = this.clearTimer.bind(this);
	},
	setNow: function(){
		this.now[0] = this.compute(this.from[0], this.to[0]);
		this.now[1] = this.compute(this.from[1], this.to[1]);
	},
	scrollTo: function(x, y){
		if (this.timer && this.options.wait) return;
		var left = document.documentElement.scrollLeft || window.pageXOffset || 0;
		var top =  document.documentElement.scrollTop || window.pageYOffset || 0;
		var width = window.innerWidth || document.documentElement.clientWidth || 0;
		var height = window.innerHeight || document.documentElement.clientHeight || 0;
		var fullWidth = document.documentElement.scrollWidth;
		var fullHeight = document.documentElement.scrollHeight;
		var maxScrollWidth = fullWidth - width;
		var maxScrollHeight = fullHeight - height;
		if (x > maxScrollWidth) x = maxScrollWidth;
		if (y > maxScrollHeight) y = maxScrollHeight;
		this.now = [[left, top], [x, y]];
		return this.custom([left, top], [x, y]);
	},
	toElement: function(el){
		return this.scrollTo($Element(el, 'getLeft'), $Element(el, 'getTop'));
	},
	increase: function(){
		window.scrollTo(this.now[0], this.now[1]);
	}
});

//fx.Color, originally by Tom Jensen (http://neuemusic.com) MIT-style LICENSE.

Fx.Color = Class.create();
Fx.Color.prototype = Object.extend(new Fx.Base(), {
	
	initialize: function(el, property, options){
		this.element = $(el);
		this.setOptions(options);
		this.property = property.camelize();
		this.now = [];
	},

	custom: function(from, to){
		return this._start(from.hexToRgb(true), to.hexToRgb(true));
	},

	setNow: function(){
		[0,1,2].each(function(i){
			this.now[i] = Math.round(this.compute(this.from[i], this.to[i]));
		}.bind(this));
	},

	increase: function(){
		this.element.style[this.property] = "rgb("+this.now[0]+","+this.now[1]+","+this.now[2]+")";
	}

});

Object.extend(String.prototype, {

	rgbToHex: function(array){
		var rgb = this.match(new RegExp('([\\d]{1,3})', 'g'));
		if (rgb[3] == 0) return 'transparent';
		var hex = [];
		for (var i = 0; i < 3; i++){
			var bit = (rgb[i]-0).toString(16);
			hex.push(bit.length == 1 ? '0'+bit : bit);
		}
		var hexText = '#'+hex.join('');
		if (array) return hex;
		else return hexText;
	},

	hexToRgb: function(array){
		var hex = this.match(new RegExp('^[#]{0,1}([\\w]{1,2})([\\w]{1,2})([\\w]{1,2})$'));
		var rgb = [];
		for (var i = 1; i < hex.length; i++){
			if (hex[i].length == 1) hex[i] += hex[i];
			rgb.push(parseInt(hex[i], 16));
		}
		var rgbText = 'rgb('+rgb.join(',')+')';
		if (array) return rgb;
		else return rgbText;
	}	

});