source: branches/2.3/themes/default/js/ui/jquery.effects.fold.js @ 12344

/*
 * jQuery UI Effects Fold 1.8.10
 *
 * Copyright 2011, 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/Fold
 *
 * Depends:
 *      jquery.effects.core.js
 */
(function( $, undefined ) {

$.effects.fold = function(o) {

        return this.queue(function() {

                // Create element
                var el = $(this), props = ['position','top','bottom','left','right'];

                // Set options
                var mode = $.effects.setMode(el, o.options.mode || 'hide'); // Set Mode
                var size = o.options.size || 15; // Default fold size
                var horizFirst = !(!o.options.horizFirst); // Ensure a boolean value
                var duration = o.duration ? o.duration / 2 : $.fx.speeds._default / 2;

                // Adjust
                $.effects.save(el, props); el.show(); // Save & Show
                var wrapper = $.effects.createWrapper(el).css({overflow:'hidden'}); // Create Wrapper
                var widthFirst = ((mode == 'show') != horizFirst);
                var ref = widthFirst ? ['width', 'height'] : ['height', 'width'];
                var distance = widthFirst ? [wrapper.width(), wrapper.height()] : [wrapper.height(), wrapper.width()];
                var percent = /([0-9]+)%/.exec(size);
                if(percent) size = parseInt(percent[1],10) / 100 * distance[mode == 'hide' ? 0 : 1];
                if(mode == 'show') wrapper.css(horizFirst ? {height: 0, width: size} : {height: size, width: 0}); // Shift

                // Animation
                var animation1 = {}, animation2 = {};
                animation1[ref[0]] = mode == 'show' ? distance[0] : size;
                animation2[ref[1]] = mode == 'show' ? distance[1] : 0;

                // Animate
                wrapper.animate(animation1, duration, o.options.easing)
                .animate(animation2, duration, o.options.easing, function() {
                        if(mode == 'hide') el.hide(); // Hide
                        $.effects.restore(el, props); $.effects.removeWrapper(el); // Restore
                        if(o.callback) o.callback.apply(el[0], arguments); // Callback
                        el.dequeue();
                });

        });

};

})(jQuery);