//accordion.js v2.0

//Copyright (c) 2007 stickmanlabs
//Author: Kevin P Miller | http://www.stickmanlabs.com

//Accordion is freely distributable under the terms of an MIT-style license.

//I don't care what you think about the file size...
//Be a pro:
//http://www.thinkvitamin.com/features/webapps/serving-javascript-fast
//http://rakaz.nl/item/make_your_pages_load_faster_by_combining_and_compressing_javascript_and_css_files


/*-----------------------------------------------------------------------------------------------*/

if (typeof Effect == 'undefined')
	throw("accordion.js requires including script.aculo.us' effects.js library!");

var accordion = Class.create();
accordion.prototype = {

		//
		//  Setup the Variables
		//
		showAccordion : null,
		currentAccordion : null,
		duration : null,
		effects : [],
		animating : false,

		//
		//  Initialize the accordions
		//
		initialize: function(container, options) {
	if (!$(container)) {
		throw(container+" doesn't exist!");
		return false;
	}

	this.options = Object.extend({
		resizeSpeed : 8,
		classNames : {
		toggle : 'accordion_toggle',
		toggleActive : 'accordion_toggle_active',
		content : 'accordion_content'
	},
	defaultSize : {
		height : null,
		width : null
	},
	direction : 'vertical',
	onEvent : 'click'
	}, options || {});

	this.duration = ((11-this.options.resizeSpeed)*0.15);

	var accordions = $$('#'+container+' .'+this.options.classNames.toggle);
	accordions.each(function(accordion) {
		Event.observe(accordion, this.options.onEvent, this.activate.bind(this, accordion), false);
		if (this.options.onEvent == 'click') {
			accordion.onclick = function() {return false;};
		}

		if (this.options.direction == 'horizontal') {
			var options = {width: '0px', display:'none'};
		} else {
			var options = {height: '0px', display:'none'};
		}
		//                      options.merge({display: 'none'});

		this.currentAccordion = $(accordion.next(0)).setStyle(options);
	}.bind(this));
},

//
//  Activate an accordion
//
activate : function(accordion) {
	if (this.animating) {
		return false;
	}

	this.effects = [];

	this.currentAccordion = $(accordion.next(0));
	this.currentAccordion.setStyle({
		display: 'block'
	});

	this.currentAccordion.previous(0).addClassName(this.options.classNames.toggleActive);

	if (this.options.direction == 'horizontal') {
		this.scaling = $H({
			scaleX: true,
			scaleY: false
		});
	} else {
		this.scaling = $H({
			scaleX: false,
			scaleY: true
		});
	}

	if (this.currentAccordion == this.showAccordion) {
		this.deactivate();
	} else {
		this._handleAccordion();
	}
},
//
// Deactivate an active accordion
//
deactivate : function() {
	var options = $H({
		duration: this.duration,
		scaleContent: false,
		transition: Effect.Transitions.sinoidal,
		queue: {
		position: 'end',
		scope: 'accordionAnimation'
	},
	scaleMode: {
		originalHeight: this.options.defaultSize.height ? this.options.defaultSize.height : this.currentAccordion.scrollHeight,
				originalWidth: this.options.defaultSize.width ? this.options.defaultSize.width : this.currentAccordion.scrollWidth
	},
	afterFinish: function() {
		this.showAccordion.setStyle({
			height: 'auto',
			display: 'none'
		});
		this.showAccordion = null;
		this.animating = false;
	}.bind(this)
	});
//	options.merge(this.scaling);

	this.showAccordion.previous(0).removeClassName(this.options.classNames.toggleActive);

	new Effect.Scale(this.showAccordion, 0, options.update(this.scaling).toObject());
},

//
// Handle the open/close actions of the accordion
//
_handleAccordion : function() {
	var options = $H({
		sync: true,
		scaleFrom: 0,
		scaleContent: false,
		transition: Effect.Transitions.sinoidal,
		scaleMode: {
		originalHeight: this.options.defaultSize.height ? this.options.defaultSize.height : this.currentAccordion.scrollHeight,
				originalWidth: this.options.defaultSize.width ? this.options.defaultSize.width : this.currentAccordion.scrollWidth
	}
	});
	options.merge(this.scaling);

	this.effects.push(
			new Effect.Scale(this.currentAccordion, 100, options.update(this.scaling).toObject())
	);

	if (this.showAccordion) {
		this.showAccordion.previous(0).removeClassName(this.options.classNames.toggleActive);

		options = $H({
			sync: true,
			scaleContent: false,
			transition: Effect.Transitions.sinoidal
		});
		options.merge(this.scaling);

		this.effects.push(
				new Effect.Scale(this.showAccordion, 0, options.update(this.scaling).toObject())
		);
	}

	new Effect.Parallel(this.effects, {
		duration: this.duration,
		queue: {
		position: 'end',
		scope: 'accordionAnimation'
	},
	beforeStart: function() {
		this.animating = true;
	}.bind(this),
	afterFinish: function() {
		if (this.showAccordion) {
			this.showAccordion.setStyle({
				display: 'none'
			});
		}
		$(this.currentAccordion).setStyle({
			height: 'auto'
		});
		this.showAccordion = this.currentAccordion;
		this.animating = false;
	}.bind(this)
	});
}
}