/*

 * jQuery UI Effects Fold 1.8.1

 *

 * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)

 * Dual licensed under the MIT (MIT-LICENSE.txt)

 * and GPL (GPL-LICENSE.txt) licenses.

 *

 * http://docs.jquery.com/UI/Effects/Fold

 *

 * Depends:

 *	jquery.effects.core.js

 */

(function($) {

$.effects.fold = function(o) {

	return this.queue(function() {

		// Create element

		var el = $(this), props = ['position','top','left'];

		// Set options

		var mode = $.effects.setMode(el, o.options.mode || 'hide'); // Set Mode

		var size = o.options.size || 15; // Default fold size

		var horizFirst = !(!o.options.horizFirst); // Ensure a boolean value

		var duration = o.duration ? o.duration / 2 : $.fx.speeds._default / 2;

		// Adjust

		$.effects.save(el, props); el.show(); // Save & Show

		var wrapper = $.effects.createWrapper(el).css({overflow:'hidden'}); // Create Wrapper

		var widthFirst = ((mode == 'show') != horizFirst);

		var ref = widthFirst ? ['width', 'height'] : ['height', 'width'];

		var distance = widthFirst ? [wrapper.width(), wrapper.height()] : [wrapper.height(), wrapper.width()];

		var percent = /([0-9]+)%/.exec(size);

		if(percent) size = parseInt(percent[1],10) / 100 * distance[mode == 'hide' ? 0 : 1];

		if(mode == 'show') wrapper.css(horizFirst ? {height: 0, width: size} : {height: size, width: 0}); // Shift

		// Animation

		var animation1 = {}, animation2 = {};

		animation1[ref[0]] = mode == 'show' ? distance[0] : size;

		animation2[ref[1]] = mode == 'show' ? distance[1] : 0;

		// Animate

		wrapper.animate(animation1, duration, o.options.easing)

		.animate(animation2, duration, o.options.easing, function() {

			if(mode == 'hide') el.hide(); // Hide

			$.effects.restore(el, props); $.effects.removeWrapper(el); // Restore

			if(o.callback) o.callback.apply(el[0], arguments); // Callback

			el.dequeue();

		});

	});

};

})(jQuery);