/*!

 * jQuery UI Effects Drop 1.10.3

 * http://jqueryui.com

 *

 * Copyright 2013 jQuery Foundation and other contributors

 * Released under the MIT license.

 * http://jquery.org/license

 *

 * http://api.jqueryui.com/drop-effect/

 *

 * Depends:

 *	jquery.ui.effect.js

 */

(function( $, undefined ) {

$.effects.effect.drop = function( o, done ) {

	var el = $( this ),

		props = [ "position", "top", "bottom", "left", "right", "opacity", "height", "width" ],

		mode = $.effects.setMode( el, o.mode || "hide" ),

		show = mode === "show",

		direction = o.direction || "left",

		ref = ( direction === "up" || direction === "down" ) ? "top" : "left",

		motion = ( direction === "up" || direction === "left" ) ? "pos" : "neg",

		animation = {

			opacity: show ? 1 : 0

		},

		distance;

	// Adjust

	$.effects.save( el, props );

	el.show();

	$.effects.createWrapper( el );

	distance = o.distance || el[ ref === "top" ? "outerHeight": "outerWidth" ]( true ) / 2;

	if ( show ) {

		el

			.css( "opacity", 0 )

			.css( ref, motion === "pos" ? -distance : distance );

	}

	// Animation

	animation[ ref ] = ( show ?

		( motion === "pos" ? "+=" : "-=" ) :

		( motion === "pos" ? "-=" : "+=" ) ) +

		distance;

	// Animate

	el.animate( animation, {

		queue: false,

		duration: o.duration,

		easing: o.easing,

		complete: function() {

			if ( mode === "hide" ) {

				el.hide();

			}

			$.effects.restore( el, props );

			$.effects.removeWrapper( el );

			done();

		}

	});

};

})(jQuery);