js signal & simple inheritance

signal.js

/* Simple JavaScript Inheritance
 * By John Resig http://ejohn.org/
 * MIT Licensed.
 */
// Inspired by base2 and Prototype
(function(){
  var initializing = false, fnTest = /xyz/.test(function(){xyz;}) ? /\b_super\b/ : /.*/;
  // The base Class implementation (does nothing)
  this.Class = function(){};

  // Create a new Class that inherits from this class
  Class.extend = function(prop) {
    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.init )
        this.init.apply(this, arguments);
    }

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

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

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

    return Class;
  };
})();


/**
 * Global PubSub signals
 */
;(function($) {

    var signs = {};

    $.signal = function( id ) {

        if (!id) {
            throw "id parameter missing in $.signal(id)";
            return undefined;
        }

        if ( !signs[ id ] ) {
            var callbacks = jQuery.Callbacks( 'stopOnFalse' );
            signs[ id ] = {
                send: callbacks.fire,
                sendTo: callbacks.fireWith,
                receive: callbacks.add,
                disconnect: callbacks.remove,
                wait: callbacks.lock
            }
        }
        return signs[id];
    };

    $.getSignals = function() {
        return signs;
    }

})(jQuery);


/**
 * Signal class
 */
var Signal =  {

    Base : Class.extend({

        init: function( name ) {
            this.signs = {};
            this.name = (name) ? name : 'base';
        },

        signal: function( id ) {

            if (!id) {
                throw "id parameter missing in $.signal(id)";

            } else {
                var sid = this.name+'.'+id;
                if ( !this.signs[sid] ) {
                    var callbacks = jQuery.Callbacks( 'stopOnFalse' );
                    this.signs[ sid ] = {
                        send: callbacks.fire,
                        sendTo: callbacks.fireWith,
                        receive: callbacks.add,
                        disconnect: callbacks.remove,
                        wait: callbacks.lock,
                        base: this
                    }
                }
            }

            return this.signs[sid];
        },

        call: function( id, context, data ) {
            if (!context) {
                $.signal( id ).send( this, data );
            } else {
                $.signal( id ).sendTo( context, [this, data] );
            }
        }
    })
    
}


Signal.Test = Signal.Base.extend( {
   init : function( name ) {
       this._super( name );
   }
});