/*
---

script: Class.Refactor.js

name: Class.Refactor

description: Extends a class onto itself with new property, preserving any items attached to the class's namespace.

license: MIT-style license

authors:
  - Aaron Newton

requires:
  - Core/Class
  - /MooTools.More

# Some modules declare themselves dependent on Class.Refactor
provides: [Class.refactor, Class.Refactor]

...
*/

Class.refactor = function(original, refactors){

	Object.each(refactors, function(item, name){
		var origin = original.prototype[name];
		origin = (origin && origin.$origin) || origin || function(){};
		original.implement(name, (typeof item == 'function') ? function(){
			var old = this.previous;
			this.previous = origin;
			var value = item.apply(this, arguments);
			this.previous = old;
			return value;
		} : item);
	});

	return original;

};