/*!
 * jQuery UI Effects Blind @VERSION
 *
 * Copyright 2012, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Effects/Blind
 *
 * Depends:
 *	jquery.ui.effect.js
 */
(function( $, undefined ) {

var rvertical = /up|down|vertical/,
	rpositivemotion = /up|left|vertical|horizontal/;

$.effects.effect.blind = function( o, done ) {
	// Create element
	var el = $( this ),
		props = [ "position", "top", "bottom", "left", "right", "height", "width" ],
		mode = $.effects.setMode( el, o.mode || "hide" ),
		direction = o.direction || "up",
		vertical = rvertical.test( direction ),
		ref = vertical ? "height" : "width",
		ref2 = vertical ? "top" : "left",
		motion = rpositivemotion.test( direction ),
		animation = {},
		show = mode === "show",
		wrapper, distance, margin;

	// if already wrapped, the wrapper's properties are my property. #6245
	if ( el.parent().is( ".ui-effects-wrapper" ) ) {
		$.effects.save( el.parent(), props );
	} else {
		$.effects.save( el, props );
	}
	el.show();
	wrapper = $.effects.createWrapper( el ).css({
		overflow: "hidden"
	});

	distance = wrapper[ ref ]();
	margin = parseFloat( wrapper.css( ref2 ) );

	animation[ ref ] = show ? distance : 0;
	if ( !motion ) {
		el
			.css( vertical ? "bottom" : "right", 0 )
			.css( vertical ? "top" : "left", "auto" )
			.css({ position: "absolute" });

	animation[ ref2 ] = show ? margin : distance + margin;
	}

	// start at 0 if we are showing
	if ( show ) {
		wrapper.css( ref, 0 );
		if ( ! motion ) {
			wrapper.css( ref2, margin + distance );
		}
	}

	// Animate
	wrapper.animate( animation, {
		duration: o.duration,
		easing: o.easing,
		queue: false,
		complete: function() {
			if ( mode === "hide" ) {
				el.hide();
			}
			$.effects.restore( el, props );
			$.effects.removeWrapper( el );
			done();
		}
	});

};

})(jQuery);