adobe/brackets

/*!
 * jQuery UI Effects Bounce @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/Bounce
 *
 * Depends:
 *    jquery.effects.core.js
 */
(function( $, undefined ) {

$.effects.effect.bounce = function( o, done ) {
    var el = $( this ),
        props = [ "position", "top", "bottom", "left", "right", "height", "width" ],

        // defaults:
        mode = $.effects.setMode( el, o.mode || "effect" ),
        hide = mode === "hide",
        show = mode === "show",
        direction = o.direction || "up",
        distance = o.distance,
        times = o.times || 5,

        // number of internal animations
        anims = times * 2 + ( show || hide ? 1 : 0 ),
        speed = o.duration / anims,
        easing = o.easing,

        // utility:
        ref = ( direction === "up" || direction === "down" ) ? "top" : "left",
        motion = ( direction === "up" || direction === "left" ),
        i,
        upAnim,
        downAnim,

        // we will need to re-assemble the queue to stack our animations in place
        queue = el.queue(),
        queuelen = queue.length;

    // Avoid touching opacity to prevent clearType and PNG issues in IE
    if ( show || hide ) {
        props.push( "opacity" );
    }

    $.effects.save( el, props );
    el.show();
    $.effects.createWrapper( el ); // Create Wrapper

    // default distance for the BIGGEST bounce is the outer Distance / 3
    if ( !distance ) {
        distance = el[ ref === "top" ? "outerHeight" : "outerWidth" ]() / 3;
    }

    if ( show ) {
        downAnim = { opacity: 1 };
        downAnim[ ref ] = 0;

        // if we are showing, force opacity 0 and set the initial position
        // then do the "first" animation
        el.css( "opacity", 0 )
            .css( ref, motion ? -distance * 2 : distance * 2 )
            .animate( downAnim, speed, easing );
    }

    // start at the smallest distance if we are hiding
    if ( hide ) {
        distance = distance / Math.pow( 2, times - 1 );
    }

    downAnim = {};
    downAnim[ ref ] = 0;
    // Bounces up/down/left/right then back to 0 -- times * 2 animations happen here
    for ( i = 0; i < times; i++ ) {
        upAnim = {};
        upAnim[ ref ] = ( motion ? "-=" : "+=" ) + distance;

        el.animate( upAnim, speed, easing )
            .animate( downAnim, speed, easing );

        distance = hide ? distance * 2 : distance / 2;
    }

    // Last Bounce when Hiding
    if ( hide ) {
        upAnim = { opacity: 0 };
        upAnim[ ref ] = ( motion ? "-=" : "+=" ) + distance;

        el.animate( upAnim, speed, easing );
    }

    el.queue(function() {
        if ( hide ) {
            el.hide();
        }
        $.effects.restore( el, props );
        $.effects.removeWrapper( el );
        done();
    });

    // inject all the animations we just queued to be first in line (after "inprogress")
    if ( queuelen > 1) {
        queue.splice.apply( queue,
            [ 1, 0 ].concat( queue.splice( queuelen, anims + 1 ) ) );
    }
    el.dequeue();

};

})(jQuery);