/* 
 * Tools and base for javascript class
 *
 * Inspired by John Resig http://ejohn.org/
 */
(function() {
	var initializing = false, fnTest = /xyz/.test(function(){xyz;}) ? /\b_super\b/ : /.*/;

	//Dummy class
	this.Class = function() {
		
		//Function to remap "this" on callback
		this.call = function() {
			var self = this;
			var args = $.makeArray(arguments);
			var func = args.shift();
		
            if (typeof func != 'function') func = eval('self.'+func);
			return function() {
				func.apply(self, arguments);
			}
		}
	};

	//Create a new Class that inherits from this class
	this.Class.create = function(prop1, prop2) {
		var prop = (prop2 == undefined) ? prop1 : prop2;
		
		$.extend(Class, prop1);

		var _super = this.prototype;

		// Instantiate a base class (but only create the instance, don't run the init constructor)
		initializing = true;
		var prototype = new this();
		initializing = false;

		// Copy the properties over onto the new prototype
		for (var name in prop) {
		// Check if we're overwriting an existing function
		prototype[name] = typeof prop[name] == "function" && 
			typeof _super[name] == "function" && fnTest.test(prop[name]) ?
			(function(name, fn){
				return function() {
					var tmp = this._super;

					// Add a new ._super() method that is the same method but on the super-class
					this._super = _super[name];

					// The method only need to be bound temporarily, so we remove it when we're done executing
					var ret = fn.apply(this, arguments);        
					this._super = tmp;

					return ret;
				};
			})(name, prop[name]) :
			prop[name];
		}

		// The dummy class constructor
		function Class() {
			// All construction is actually done in the init method
			if ( !initializing && this.initialize )
				this.initialize.apply(this, arguments);
		}

		// Populate our constructed prototype object
		Class.prototype = prototype;

		// Enforce the constructor to be what we expect
		Class.constructor = Class;

		// And make this class extendable
		Class.extend = arguments.callee;

		return Class;
	};
})();