107 lines
2.0 KiB
TypeScript
107 lines
2.0 KiB
TypeScript
/**
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* ### 全局事件管理
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*
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* ```js
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* // 注册
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* Events.register("eventName", () => {
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* // 触发执行
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* });
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*
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* // 触发
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* Events.emit("eventName", '支持参数');
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*
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* // 移除
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* Events.remove("eventName");
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* ```
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*/
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export default class Events {
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// 监听数组
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private static listeners = new Map<any, Observer<any>[]>();
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/**
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* 注册事件（会叠加）
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*
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* @param key 事件名称
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* @param callback 回调函数
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*/
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public static register<T>(key: T, callback: Function) {
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const observers: Observer<T>[] | undefined = Events.listeners.get(key);
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if (!observers) {
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Events.listeners.set(key, []);
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}
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Events.listeners.get(key)?.push(new Observer<T>(key, callback));
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}
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/**
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* 重置并注册（不会叠加）
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*
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* @param key 事件名称
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* @param callback 回调函数
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*/
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public static reset<T>(key: T, callback: Function) {
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Events.listeners.set(key, []);
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this.register(key, callback);
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}
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/**
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* 移除事件
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*
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* @param key 事件名称
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*/
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public static remove<T>(key: T) {
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const observers: Observer<T>[] | undefined = Events.listeners.get(key);
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if (observers) {
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for (let i = 0, l = observers.length; i < l; i++) {
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if (observers[i].equals(key)) {
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observers.splice(i, 1);
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break;
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}
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}
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}
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Events.listeners.delete(key);
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}
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/**
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* 触发事件
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*
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* @param key 事件名称
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* @param args 参数
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*/
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public static emit<T>(key: T, ...args: any[]) {
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const observers: Observer<T>[] | undefined = Events.listeners.get(key);
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if (observers) {
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for (const observer of observers) {
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// 通知
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observer.notify(...args);
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}
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}
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}
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}
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/** 观察者 */
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class Observer<T> {
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private callback: Function = () => {}; // 回调函数
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private readonly key: T;
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constructor(key: T, callback: Function) {
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this.key = key;
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this.callback = callback;
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}
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/**
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* 发送通知
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*
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* @param args 不定参数
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*/
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notify(...args: any[]): void {
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this.callback.call(this.key, ...args);
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}
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equals(name: any): boolean {
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return name === this.key;
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}
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}
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