/* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4:        *
 *******************************************************************
 * Project: Inheritance                                            *
 * Author:  John Resig <ejohn.org>                                 *
 *******************************************************************
 * JavaScript "Class" constructor and inheritance
 * Includes:
 *  Class   Class.extend( Object classData );
 *  | __constructor - Class constructor;
 *  | __construct   - Class initialization procedure.
 *  | _parent       - Call method of parental class.
 *
 *
*/

    /**//**//**//**//**//**//**//**//**//**//**//**//**//**//**//**/





(function(){
    var ___Inheritance_Initializing = false,
        ___Inheritance_fnTest = /xyz/.test(function(){xyz;}) ? /\b_parent\b/ : /.*/;
    this.Class = function(){};
    Class.extend = function( classData ){
        var _parent = this.prototype;
        ___Inheritance_Initializing = true;
        var prototype = new this();
        ___Inheritance_Initializing = false;
        for( var k in classData ){
            prototype[k] = typeof( classData[k] ) == 'function' && typeof( _parent[k] ) == 'function' && ___Inheritance_fnTest.test( classData[k] ) ?
            (function( k, fn ){
                return function(){
                    var tmp = this._parent;
                    this._parent = _parent[k];
                    var ret = fn.apply(this, arguments);        
                    this._parent = tmp;
                    return ret;
                };
            })( k, classData[k] ) : classData[k];
        }
        function Class(){
            if( !___Inheritance_Initializing && this.__construct ){
                this.__construct.apply( this, arguments );
            }
        }
        Class.prototype = prototype;
        Class.__constructor = Class;
        Class.extend = arguments.callee;
        return Class;
    };
})();