wikimedia/mediawiki-core

/*!
 * jQuery UI Effects Drop 1.9.2
 * http://jqueryui.com
 *
 * Copyright 2012 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);