guy
6 years ago
9 changed files with 972 additions and 822 deletions
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@ -1,152 +1,177 @@
|
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/** |
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* 客户端观察者，主要处理事件的添加、删除、执行等 |
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* @class BI.OB |
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* @abstract |
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*/ |
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BI.OB = function (config) { |
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var props = this.props; |
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if (BI.isFunction(this.props)) { |
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props = this.props(config); |
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} |
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this.options = (_global.$ || _global._).extend(this._defaultConfig(config), props, config); |
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this._init(); |
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this._initRef(); |
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}; |
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_.extend(BI.OB.prototype, { |
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props: {}, |
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init: null, |
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destroyed: null, |
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_defaultConfig: function (config) { |
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return {}; |
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}, |
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!(function () { |
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function extend () { |
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var target = arguments[0] || {}, length = arguments.length, i = 1, options, name, src, copy; |
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for (; i < length; i++) { |
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// Only deal with non-null/undefined values
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if ((options = arguments[i]) != null) { |
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// Extend the base object
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for (name in options) { |
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src = target[name]; |
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copy = options[name]; |
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_init: function () { |
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this._initListeners(); |
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this.init && this.init(); |
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}, |
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// Prevent never-ending loop
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if (target === copy) { |
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continue; |
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} |
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_initListeners: function () { |
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var self = this; |
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if (this.options.listeners != null) { |
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_.each(this.options.listeners, function (lis) { |
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(lis.target ? lis.target : self)[lis.once ? "once" : "on"] |
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(lis.eventName, _.bind(lis.action, self)); |
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}); |
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delete this.options.listeners; |
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if (copy !== undefined) { |
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target[name] = copy; |
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} |
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} |
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} |
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} |
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}, |
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} |
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|
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// 获得一个当前对象的引用
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_initRef: function () { |
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if (this.options.ref) { |
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this.options.ref.call(this, this); |
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/** |
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* 客户端观察者，主要处理事件的添加、删除、执行等 |
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* @class BI.OB |
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* @abstract |
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*/ |
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BI.OB = function (config) { |
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var props = this.props; |
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if (BI.isFunction(this.props)) { |
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props = this.props(config); |
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} |
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}, |
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this.options = extend(this._defaultConfig(config), props, config); |
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this._init(); |
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this._initRef(); |
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}; |
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_.extend(BI.OB.prototype, { |
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props: {}, |
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init: null, |
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destroyed: null, |
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|
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//释放当前对象
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_purgeRef: function(){ |
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if (this.options.ref) { |
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this.options.ref.call(null); |
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} |
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}, |
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_defaultConfig: function (config) { |
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return {}; |
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}, |
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_getEvents: function () { |
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if (!_.isArray(this.events)) { |
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this.events = []; |
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} |
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return this.events; |
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}, |
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_init: function () { |
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this._initListeners(); |
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this.init && this.init(); |
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}, |
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|
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/** |
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* 给观察者绑定一个事件 |
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* @param {String} eventName 事件的名字 |
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* @param {Function} fn 事件对应的执行函数 |
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*/ |
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on: function (eventName, fn) { |
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eventName = eventName.toLowerCase(); |
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var fns = this._getEvents()[eventName]; |
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if (!_.isArray(fns)) { |
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fns = []; |
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this._getEvents()[eventName] = fns; |
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} |
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fns.push(fn); |
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}, |
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_initListeners: function () { |
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var self = this; |
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if (this.options.listeners != null) { |
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_.each(this.options.listeners, function (lis) { |
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(lis.target ? lis.target : self)[lis.once ? "once" : "on"] |
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(lis.eventName, _.bind(lis.action, self)); |
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}); |
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delete this.options.listeners; |
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} |
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}, |
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/** |
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* 给观察者绑定一个只执行一次的事件 |
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* @param {String} eventName 事件的名字 |
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* @param {Function} fn 事件对应的执行函数 |
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*/ |
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once: function (eventName, fn) { |
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var proxy = function () { |
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fn.apply(this, arguments); |
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this.un(eventName, proxy); |
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}; |
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this.on(eventName, proxy); |
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}, |
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/** |
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* 解除观察者绑定的指定事件 |
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* @param {String} eventName 要解除绑定事件的名字 |
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* @param {Function} fn 事件对应的执行函数，该参数是可选的，没有该参数时，将解除绑定所有同名字的事件 |
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*/ |
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un: function (eventName, fn) { |
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eventName = eventName.toLowerCase(); |
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// 获得一个当前对象的引用
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_initRef: function () { |
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if (this.options.ref) { |
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this.options.ref.call(this, this); |
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} |
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}, |
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/* alex:如果fn是null,就是把eventName上面所有方法都un掉*/ |
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if (fn == null) { |
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delete this._getEvents()[eventName]; |
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} else { |
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//释放当前对象
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_purgeRef: function () { |
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if (this.options.ref) { |
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this.options.ref.call(null); |
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} |
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}, |
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_getEvents: function () { |
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if (!_.isArray(this.events)) { |
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this.events = []; |
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} |
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return this.events; |
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}, |
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|
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/** |
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* 给观察者绑定一个事件 |
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* @param {String} eventName 事件的名字 |
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* @param {Function} fn 事件对应的执行函数 |
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*/ |
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on: function (eventName, fn) { |
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eventName = eventName.toLowerCase(); |
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var fns = this._getEvents()[eventName]; |
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if (_.isArray(fns)) { |
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var newFns = []; |
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_.each(fns, function (ifn) { |
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if (ifn != fn) { |
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newFns.push(ifn); |
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} |
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}); |
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this._getEvents()[eventName] = newFns; |
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if (!_.isArray(fns)) { |
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fns = []; |
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this._getEvents()[eventName] = fns; |
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} |
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} |
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}, |
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/** |
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* 清除观察者的所有事件绑定 |
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*/ |
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purgeListeners: function () { |
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/* alex:清空events*/ |
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this.events = []; |
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}, |
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/** |
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* 触发绑定过的事件 |
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* |
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* @param {String} eventName 要触发的事件的名字 |
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* @returns {Boolean} 如果事件函数返回false，则返回false并中断其他同名事件的执行，否则执行所有的同名事件并返回true |
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*/ |
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fireEvent: function () { |
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var eventName = arguments[0].toLowerCase(); |
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var fns = this._getEvents()[eventName]; |
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if (BI.isArray(fns)) { |
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if (BI.isArguments(arguments[1])) { |
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for (var i = 0; i < fns.length; i++) { |
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if (fns[i].apply(this, arguments[1]) === false) { |
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return false; |
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} |
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} |
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fns.push(fn); |
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}, |
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|
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/** |
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* 给观察者绑定一个只执行一次的事件 |
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* @param {String} eventName 事件的名字 |
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* @param {Function} fn 事件对应的执行函数 |
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*/ |
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once: function (eventName, fn) { |
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var proxy = function () { |
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fn.apply(this, arguments); |
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this.un(eventName, proxy); |
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}; |
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this.on(eventName, proxy); |
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}, |
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/** |
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* 解除观察者绑定的指定事件 |
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* @param {String} eventName 要解除绑定事件的名字 |
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* @param {Function} fn 事件对应的执行函数，该参数是可选的，没有该参数时，将解除绑定所有同名字的事件 |
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*/ |
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un: function (eventName, fn) { |
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eventName = eventName.toLowerCase(); |
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|
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/* alex:如果fn是null,就是把eventName上面所有方法都un掉*/ |
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if (fn == null) { |
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delete this._getEvents()[eventName]; |
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} else { |
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var args = Array.prototype.slice.call(arguments, 1); |
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for (var i = 0; i < fns.length; i++) { |
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if (fns[i].apply(this, args) === false) { |
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return false; |
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var fns = this._getEvents()[eventName]; |
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if (_.isArray(fns)) { |
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var newFns = []; |
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_.each(fns, function (ifn) { |
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if (ifn != fn) { |
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newFns.push(ifn); |
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} |
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}); |
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this._getEvents()[eventName] = newFns; |
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} |
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} |
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}, |
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/** |
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* 清除观察者的所有事件绑定 |
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*/ |
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purgeListeners: function () { |
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/* alex:清空events*/ |
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this.events = []; |
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}, |
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/** |
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* 触发绑定过的事件 |
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* |
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* @param {String} eventName 要触发的事件的名字 |
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* @returns {Boolean} 如果事件函数返回false，则返回false并中断其他同名事件的执行，否则执行所有的同名事件并返回true |
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*/ |
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fireEvent: function () { |
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var eventName = arguments[0].toLowerCase(); |
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var fns = this._getEvents()[eventName]; |
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if (BI.isArray(fns)) { |
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if (BI.isArguments(arguments[1])) { |
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for (var i = 0; i < fns.length; i++) { |
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if (fns[i].apply(this, arguments[1]) === false) { |
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return false; |
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} |
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} |
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} else { |
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var args = Array.prototype.slice.call(arguments, 1); |
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for (var i = 0; i < fns.length; i++) { |
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if (fns[i].apply(this, args) === false) { |
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return false; |
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} |
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} |
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} |
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} |
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} |
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return true; |
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}, |
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return true; |
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}, |
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|
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destroy: function () { |
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this.destroyed && this.destroyed(); |
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this._purgeRef(); |
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this.purgeListeners(); |
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} |
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}); |
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destroy: function () { |
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this.destroyed && this.destroyed(); |
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this._purgeRef(); |
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this.purgeListeners(); |
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} |
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}); |
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})(); |
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