ClassManager.compileSuper.ClassManager = ClassManager;/* Managed JavaScript Inheritance* Based on John Resig's Simple JavaScript Inheritance http://ejohn.org/blog/simple-javascript-inheritance/* MIT Licensed.* 在这里申明了，实现JS继承的方式 是参考了 John Resig's  的一个例子来实现的；并且有原文地址，有兴趣的同学可以去看看原版实现方式*/
(function () {var fnTest = /\b_super\b/;var config = cc.game.config;var releaseMode = config[cc.game.CONFIG_KEY.classReleaseMode];if(releaseMode) {console.log("release Mode");}/*** The base Class implementation (does nothing)* @class*/cc.Class = function () {};/*** Create a new Class that inherits from this Class* @static* @param {object} props* @return {function}*/cc.Class.extend = function (props) {//声明_super对象，并赋值为原型var _super = this.prototype;// Instantiate a base Class (but only create the instance,// don't run the init constructor)//实例化创建prototype这个基类，只是创建实例，并没有跑init构造函数var prototype = Object.create(_super);//给这个class复制ID标识，并且将_super对象添加到ClassManager类管理器中var classId = ClassManager.getNewID();ClassManager[classId] = _super;// Copy the properties over onto the new prototype. We make function// properties non-eumerable as this makes typeof === 'function' check// unneccessary in the for...in loop used 1) for generating Class()// 2) for cc.clone and perhaps more. It is also required to make// these function properties cacheable in Carakan.//进行函数的验证检测，以及设置他使用基本设置var desc = { writable: true, enumerable: false, configurable: true };//单例模式的基础申明prototype.__instanceId = null;// The dummy Class constructor//创建Class这个类function Class() {this.__instanceId = ClassManager.getNewInstanceId();// All construction is actually done in the init method//如果这个类他存在.ctor方法，那么就默认的使用执行这个方法//ctor在JS中就相当于构造函数if (this.ctor)this.ctor.apply(this, arguments);}//给ID复制Class.id = classId;// desc = { writable: true, enumerable: false, configurable: true,//          value: XXX }; Again, we make this non-enumerable.desc.value = classId;Object.defineProperty(prototype, '__pid', desc);// Populate our constructed prototype object//把我们原型对象赋值Class.prototype = prototype;// Enforce the constructor to be what we expect//将整个类赋值给desc.valuedesc.value = Class;//并且将类里构造的对象赋值Object.defineProperty(Class.prototype, 'constructor', desc);// Copy getter/setter//模拟get/set的方式，使用cc.clone函数来拷贝this.__getters__ && (Class.__getters__ = cc.clone(this.__getters__));this.__setters__ && (Class.__setters__ = cc.clone(this.__setters__));for(var idx = 0, li = arguments.length; idx < li; ++idx) {var prop = arguments[idx];for (var name in prop) {var isFunc = (typeof prop[name] === "function");var override = (typeof _super[name] === "function");var hasSuperCall = fnTest.test(prop[name]);if (releaseMode && isFunc && override && hasSuperCall) {desc.value = ClassManager.compileSuper(prop[name], name, classId);Object.defineProperty(prototype, name, desc);} else if (isFunc && override && hasSuperCall) {desc.value = (function (name, fn) {return function () {var tmp = this._super;// Add a new ._super() method that is the same method// but on the super-Class//如果在新的对象方法里面添加._super()，他会继承父类的_super方法//并且实现方法里面的所有对象及方法的赋值this._super = _super[name];// The method only need to be bound temporarily, so we// remove it when we're done executingvar ret = fn.apply(this, arguments);this._super = tmp;return ret;};})(name, prop[name]);Object.defineProperty(prototype, name, desc);} else if (isFunc) {desc.value = prop[name];Object.defineProperty(prototype, name, desc);} else {prototype[name] = prop[name];}if (isFunc) {// Override registered getter/setter//如果是方法，那么重载里面的属性，并且实现get,set方法可以直接使用var getter, setter, propertyName;if (this.__getters__ && this.__getters__[name]) {propertyName = this.__getters__[name];for (var i in this.__setters__) {if (this.__setters__[i] === propertyName) {setter = i;break;}}cc.defineGetterSetter(prototype, propertyName, prop[name], prop[setter] ? prop[setter] : prototype[setter], name, setter);}if (this.__setters__ && this.__setters__[name]) {propertyName = this.__setters__[name];for (var i in this.__getters__) {if (this.__getters__[i] === propertyName) {getter = i;break;}}cc.defineGetterSetter(prototype, propertyName, prop[getter] ? prop[getter] : prototype[getter], prop[name], getter, name);}}}}// And make this Class extendable// 可以使用Class.extend来实现类的继承Class.extend = cc.Class.extend;//add implementation method//添加要实现的方法Class.implement = function (prop) {for (var name in prop) {prototype[name] = prop[name];}};return Class;};
})();