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/*
 * jQuery UI Effects Fold
 *
 * Copyright (c) 2008 Aaron Eisenberger (aaronchi@gmail.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 * 
 * http://docs.jquery.com/UI/Effects/Fold
 *
 * Depends:
 *	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
		
		// Adjust
		$.effects.save(el, props); el.show(); // Save & Show
		var wrapper = $.effects.createWrapper(el).css({overflow:'hidden'}); // Create Wrapper
		var ref = (mode == 'show') ? ['width', 'height'] : ['height', 'width'];
		var distance = (mode == 'show') ? [wrapper.width(), wrapper.height()] : [wrapper.height(), wrapper.width()];
		if(mode == 'show') wrapper.css({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, o.duration / 2, o.options.easing)
		.animate(animation2, o.duration / 2, 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);