/src/vendor/scripts/backbone.super.js

// This is a plugin, constructed from parts of Backbone.js and John Resig's inheritance script.
// (See http://backbonejs.org, http://ejohn.org/blog/simple-javascript-inheritance/)
// No credit goes to me as I did absolutely nothing except patch these two together.
(function(Backbone) {
	Backbone.Model.extend = Backbone.Collection.extend = Backbone.Router.extend = Backbone.View.extend = function(protoProps, classProps) {
		var child = inherits(this, protoProps, classProps);
		child.extend = this.extend;
		return child;
	};
	var unImplementedSuper = function(method){throw "Super does not implement this method: " + method;}; 

	var ctor = function(){}, inherits = function(parent, protoProps, staticProps) {
		var child, _super = parent.prototype, fnTest = /xyz/.test(function(){xyz;}) ? /\b_super\b/ : /.*/;

		// The constructor function for the new subclass is either defined by you
		// (the "constructor" property in your `extend` definition), or defaulted
		// by us to simply call the parent's constructor.
		if (protoProps && protoProps.hasOwnProperty('constructor')) {
			child = protoProps.constructor;
		} else {
			child = function(){ return parent.apply(this, arguments); };
		}

		// Inherit class (static) properties from parent.
		_.extend(child, parent, staticProps);

		// Set the prototype chain to inherit from `parent`, without calling
		// `parent`'s constructor function.
		ctor.prototype = parent.prototype;
		child.prototype = new ctor();
		
		// Add prototype properties (instance properties) to the subclass,
		// if supplied.
		if (protoProps) {
			_.extend(child.prototype, protoProps);
			
			// Copy the properties over onto the new prototype
			for (var name in protoProps) {
				// Check if we're overwriting an existing function
				if (typeof protoProps[name] == "function" &&  fnTest.test(protoProps[name])) {
					child.prototype[name] = (function(name, fn) {
						var wrapper = function() {
							var tmp = this._super;

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

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

						//we must move properties from old function to new
						for (var prop in fn) {
							wrapper[prop] = fn[prop];
							delete fn[prop];
						}
						
						return wrapper;
					})(name, protoProps[name]);
				}
			}
		}

		// Add static properties to the constructor function, if supplied.
		if (staticProps) _.extend(child, staticProps);

		// Correctly set child's `prototype.constructor`.
		child.prototype.constructor = child;

		// Set a convenience property in case the parent's prototype is needed later.
		child.__super__ = parent.prototype;

		return child;
	};
})(Backbone);