/*!
 * jQuery UI Effects Transfer - v1.10.4
 * http://jqueryui.com
 *
 * Copyright 2014 jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/transfer-effect/
 */

define([
    'jquery',
    'jquery-ui-modules/effect'
], function ($, undefined) {

    $.effects.effect.transfer = function (o, done) {
        var elem = $(this),
            target = $(o.to),
            targetFixed = target.css("position") === "fixed",
            body = $("body"),
            fixTop = targetFixed ? body.scrollTop() : 0,
            fixLeft = targetFixed ? body.scrollLeft() : 0,
            endPosition = target.offset(),
            animation = {
                top: endPosition.top - fixTop,
                left: endPosition.left - fixLeft,
                height: target.innerHeight(),
                width: target.innerWidth()
            },
            startPosition = elem.offset(),
            transfer = $("<div class='ui-effects-transfer'></div>")
                .appendTo(document.body)
                .addClass(o.className)
                .css({
                    top: startPosition.top - fixTop,
                    left: startPosition.left - fixLeft,
                    height: elem.innerHeight(),
                    width: elem.innerWidth(),
                    position: targetFixed ? "fixed" : "absolute"
                })
                .animate(animation, o.duration, o.easing, function () {
                    transfer.remove();
                    done();
                });
    };

});