/
EventEmitter.ts
55 lines (46 loc) · 1.36 KB
/
EventEmitter.ts
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/* eslint-disable @typescript-eslint/no-explicit-any */
// eslint-disable-next-line node/no-missing-import
import type * as vscode from 'vscode';
type Disposable = vscode.Disposable;
type Listener<T> = (e: T) => any;
export class EventEmitter<T> implements vscode.EventEmitter<T> {
readonly #listeners = new Set<Listener<T>>();
/**
* The event listeners can subscribe to.
*/
event(listener: (e: T) => any, thisArgs?: any, disposables?: Disposable[]): Disposable {
const fn = thisArgs ? listener.bind(thisArgs) : listener;
this.#listeners.add(fn);
const disposable = {
dispose: () => {
this.#listeners.delete(fn);
},
};
if (disposables) {
disposables.push(disposable);
}
return disposable;
}
/**
* Notify all subscribers of the {@link EventEmitter.event event}. Failure
* of one or more listener will not fail this function call.
*
* @param data The event object.
*/
fire(data: T): void {
for (const listener of this.#listeners) {
try {
listener(data);
} catch {
// ignore
}
}
}
/**
* Dispose this object and free resources.
*/
dispose(): void {
this.#listeners.clear();
}
constructor() {}
}