/*!
 * jQuery UI Effects Drop 1.13.1
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Drop Effect
//>>group: Effects
//>>description: Moves an element in one direction and hides it at the same time.
//>>docs: http://api.jqueryui.com/drop-effect/
//>>demos: http://jqueryui.com/effect/

( function( factory ) {
"use strict";

if ( typeof define === "function" && define.amd ) {

// AMD. Register as an anonymous module.
define( [
"jquery",
"./effect"
], factory );
} else {

// Browser globals
factory( jQuery );
}
} )( function( $ ) {
"use strict";

return $.effects.define( "drop", "hide", function( options, done ) {

var distance,
element = $( this ),
mode = options.mode,
show = mode === "show",
direction = options.direction || "left",
ref = ( direction === "up" || direction === "down" ) ? "top" : "left",
motion = ( direction === "up" || direction === "left" ) ? "-=" : "+=",
oppositeMotion = ( motion === "+=" ) ? "-=" : "+=",
animation = {
opacity: 0
};

$.effects.createPlaceholder( element );

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

animation[ ref ] = motion + distance;

if ( show ) {
element.css( animation );

animation[ ref ] = oppositeMotion + distance;
animation.opacity = 1;
}

// Animate
element.animate( animation, {
queue: false,
duration: options.duration,
easing: options.easing,
complete: done
} );
} );

} );