/*

Copyright (c) 2009, Yahoo! Inc. All rights reserved.

Code licensed under the BSD License:

http://developer.yahoo.net/yui/license.txt

version: 3.0.0b1

build: 1163

*/

YUI.add('anim-scroll', function(Y) {

/**

 * Adds support for the <code>scroll</code> property in <code>to</code>

 * and <code>from</code> attributes.

 * @module anim

 * @submodule anim-scroll

 */

var NUM = Number;

//TODO: deprecate for scrollTop/Left properties?

Y.Anim.behaviors.scroll = {

    set: function(anim, att, from, to, elapsed, duration, fn) {

        var

            node = anim._node, 

            val = ([

            fn(elapsed, NUM(from[0]), NUM(to[0]) - NUM(from[0]), duration),

            fn(elapsed, NUM(from[1]), NUM(to[1]) - NUM(from[1]), duration)

        ]);

        if (val[0]) {

            node.set('scrollLeft', val[0]);

        }

        if (val[1]) {

            node.set('scrollTop', val[1]);

        }

    },

    get: function(anim) {

        var node = anim._node;

        return [node.get('scrollLeft'), node.get('scrollTop')];

    }

};

}, '3.0.0b1' ,{requires:['anim-base', 'node-base']});