vscode-helpers/lib/events/index.js

Helper functions and classes for own VS Code (extensions)

"use strict";
/**
 * This file is part of the vscode-helpers distribution.
 * Copyright (c) Marcel Joachim Kloubert.
 *
 * vscode-helpers is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, version 3.
 *
 * vscode-helpers is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.tryRemoveListener = exports.tryRemoveAllListeners = exports.EVENT_DISPOSER = exports.EVENTS = void 0;
const Events = require("events");
/**
 * Stores the global event emitter.
 */
exports.EVENTS = new Events.EventEmitter();
/**
 * Disposes the event emitter, stored in 'EVENTS'.
 */
exports.EVENT_DISPOSER = {
    /** @inheritdoc */
    dispose: () => {
        exports.EVENTS.removeAllListeners();
    }
};
/**
 * Tries to remove all listeners from an event emitter.
 *
 * @param {NodeJS.EventEmitter} obj The emitter.
 * @param {string|symbol} [ev] The optional event.
 *
 * @return {boolean} Operation was successfull or not.
 */
function tryRemoveAllListeners(obj, ev) {
    try {
        if (obj && obj.removeAllListeners) {
            obj.removeAllListeners(ev);
        }
        return true;
    }
    catch {
        return false;
    }
}
exports.tryRemoveAllListeners = tryRemoveAllListeners;
/**
 * Tries to remove a listener from an event emitter.
 *
 * @param {NodeJS.EventEmitter} obj The emitter.
 * @param {string|symbol} ev The event.
 * @param {Function} listener The listener.
 *
 * @return {boolean} Operation was successfull or not.
 */
function tryRemoveListener(obj, ev, listener) {
    try {
        if (obj && obj.removeListener) {
            obj.removeListener(ev, listener);
        }
        return true;
    }
    catch {
        return false;
    }
}
exports.tryRemoveListener = tryRemoveListener;
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