//MooTools More, <http://mootools.net/more>. Copyright (c) 2006-2009 Aaron Newton <http://clientcide.com/>, Valerio Proietti <http://mad4milk.net> & the MooTools team <http://mootools.net/developers>, MIT Style License.



/*

---



script: More.js
description: MooTools More



license: MIT-style license


authors:

- Guillermo Rauch

- Thomas Aylott

- Scott Kyle



requires:

- core:1.2.4/MooTools


provides: [MooTools.More]



...

*/



MooTools.More = {

	'version': '1.2.4.4',

	'build': '6f6057dc645fdb7547689183b2311063bd653ddf'
};



/*

---



script: Fx.Scroll.js

description: Effect to smoothly scroll any element, including the window.



license: MIT-style license



authors:

- Valerio Proietti


requires:

- core:1.2.4/Fx

- core:1.2.4/Element.Event

- core:1.2.4/Element.Dimensions
- /MooTools.Mor
e


provides: [Fx.Scroll]



...

*/

Fx.Scroll = new Class({



	Extends: Fx,



	options: {

		offset: {x: 0, y: 0},

		wheelStops: true

	},



	initialize: function(element, options){

		this.element = this.subject = document.id(element);

		this.parent(options);

		var cancel = this.cancel.bind(this, false);

	

	if ($type(this.element) != 'element') this.element = document.id(this.element.getDocument().body);



		var stopper = this.element;

	

	if (this.options.wheelStops){
	
		this.addEvent('start', function(){
	
			stopper.addEvent('mousewheel', cancel);
	
		}, true);


			this.addEvent('complete', function(){

				stopper.removeEvent('mousewheel', cancel);

			}, true);

		}

	},

	

set: function(){
	
	var now = Array.flatten(arguments);

		if (Browser.Engine.gecko) now = [Math.round(now[0]), Math.round(now[1])];

		this.element.scrollTo(now[0], now[1]);

	},



	compute: function(from, to, delta){

		return [0, 1].map(function(i){

			return Fx.compute(from[i], to[i], delta);

		});

	},



	start: function(x, y){
	
	if (!this.check(x, y)) return this;

		var scrollSize = this.element.getScrollSize(),
	
		scroll = this.element.getScroll(), 
	
		values = {x: x, y: y};
	
	for (var z in values){
	
		var max = scrollSize[z];

			if ($chk(values[z])) values[z] = ($type(values[z]) == 'number') ? values[z] : max;

			else values[z] = scroll[z];

			values[z] += this.options.offset[z];

		}

		return this.parent([scroll.x, scroll.y], [values.x, values.y]);

	},

	toTop: function(){

		return this.start(false, 0);
	},



	toLeft: function(){

		return this.start(0, false);

	},



	toRight: function(){

		return this.start('right', false);

	},



	toBottom: function(){

		return this.start(false, 'bottom');

	},


	toElement: function(el){

		var position = document.id(el).getPosition(this.element);

		return this.start(position.x, position.y);

	},



	scrollIntoView: function(el, axes, offset){

		axes = axes ? $splat(axes) : ['x','y'];

		var to = {};

		el = document.id(el);

		var pos = el.getPosition(this.element);

		var size = el.getSize();

		var scroll = this.element.getScroll();

		var containerSize = this.element.getSize();

		var edge = {

			x: pos.x + size.x,

			y: pos.y + size.y

		};

		['x','y'].each(function(axis) {

			if (axes.contains(axis)) {

				if (edge[axis] > scroll[axis] + containerSize[axis]) to[axis] = edge[axis] - containerSize[axis];
				if (pos[axis] < scroll[axis]) to[axis] = pos[axis];
			}
			if (to[axis] == null) to[axis] = scroll[axis];
			if (offset && offset[axis]) to[axis] = to[axis] + offset[axis];
		}, this);
		if (to.x != scroll.x || to.y != scroll.y) this.start(to.x, to.y);
		return this;
	},

	scrollToCenter: function(el, axes, offset){
		axes = axes ? $splat(axes) : ['x', 'y'];
		el = $(el);
		var to = {},
			pos = el.getPosition(this.element),
			size = el.getSize(),
			scroll = this.element.getScroll(),
			containerSize = this.element.getSize(),
			edge = {
				x: pos.x + size.x,
				y: pos.y + size.y
			};

		['x','y'].each(function(axis){
			if(axes.contains(axis)){
				to[axis] = pos[axis] - (containerSize[axis] - size[axis])/2;
			}
			if(to[axis] == null) to[axis] = scroll[axis];
			if(offset && offset[axis]) to[axis] = to[axis] + offset[axis];
		}, this);
		if (to.x != scroll.x || to.y != scroll.y) this.start(to.x, to.y);
		return this;

	}



});