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'use strict' |
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|
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function eventManager () { |
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this.registered = {} |
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this.anonymous = {} |
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} |
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|
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/* |
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* Unregister a listener. |
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* Note that if obj is a function. the unregistration will be applied to the dummy obj {}. |
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* |
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* @param {String} eventName - the event name |
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* @param {Object or Func} obj - object that will listen on this event |
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* @param {Func} func - function of the listeners that will be executed |
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*/ |
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eventManager.prototype.unregister = function (eventName, obj, func) { |
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if (!this.registered[eventName]) { |
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return |
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} |
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if (obj instanceof Function) { |
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func = obj |
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obj = this.anonymous |
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} |
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for (let reg in this.registered[eventName]) { |
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if (this.registered[eventName][reg].obj === obj && this.registered[eventName][reg].func === func) { |
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this.registered[eventName].splice(reg, 1) |
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} |
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} |
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} |
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|
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/* |
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* Register a new listener. |
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* Note that if obj is a function, the function registration will be associated with the dummy object {} |
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* |
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* @param {String} eventName - the event name |
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* @param {Object or Func} obj - object that will listen on this event |
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* @param {Func} func - function of the listeners that will be executed |
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*/ |
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eventManager.prototype.register = function (eventName, obj, func) { |
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if (!this.registered[eventName]) { |
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this.registered[eventName] = [] |
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} |
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if (obj instanceof Function) { |
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func = obj |
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obj = this.anonymous |
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} |
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this.registered[eventName].push({ |
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obj: obj, |
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func: func |
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}) |
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} |
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|
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/* |
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* trigger event. |
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* Every listener have their associated function executed |
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* |
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* @param {String} eventName - the event name |
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* @param {Array}j - argument that will be passed to the executed function. |
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*/ |
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eventManager.prototype.trigger = function (eventName, args) { |
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if (!this.registered[eventName]) { |
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return |
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} |
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for (let listener in this.registered[eventName]) { |
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const l = this.registered[eventName][listener] |
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l.func.apply(l.obj === this.anonymous ? {} : l.obj, args) |
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} |
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} |
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module.exports = eventManager |
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