71 lines
2.1 KiB
TypeScript
71 lines
2.1 KiB
TypeScript
module es {
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/**
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* 用于包装事件的一个小类
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*/
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export class FuncPack {
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/** 函数 */
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public func: Function;
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/** 上下文 */
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public context: any;
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constructor(func: Function, context: any) {
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this.func = func;
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this.context = context;
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}
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}
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/**
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* 用于事件管理
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*/
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export class Emitter<T> {
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private _messageTable: Map<T, FuncPack[]>;
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constructor() {
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this._messageTable = new Map<T, FuncPack[]>();
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}
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/**
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* 开始监听项
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* @param eventType 监听类型
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* @param handler 监听函数
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* @param context 监听上下文
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*/
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public addObserver(eventType: T, handler: Function, context: any) {
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let list: FuncPack[] = this._messageTable.get(eventType);
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if (!list) {
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list = [];
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this._messageTable.set(eventType, list);
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}
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if (list.findIndex(funcPack => funcPack.func == handler) != -1)
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console.warn("您试图添加相同的观察者两次");
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list.push(new FuncPack(handler, context));
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}
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/**
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* 移除监听项
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* @param eventType 事件类型
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* @param handler 事件函数
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*/
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public removeObserver(eventType: T, handler: Function) {
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let messageData = this._messageTable.get(eventType);
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let index = messageData.findIndex(data => data.func == handler);
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if (index != -1)
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new linq.List(messageData).removeAt(index);
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}
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/**
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* 触发该事件
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* @param eventType 事件类型
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* @param data 事件数据
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*/
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public emit(eventType: T, ...data: any[]) {
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let list: FuncPack[] = this._messageTable.get(eventType);
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if (list) {
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for (let i = list.length - 1; i >= 0; i--)
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list[i].func.call(list[i].context, ...data);
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}
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}
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}
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}
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