161 lines
3.8 KiB
JavaScript
161 lines
3.8 KiB
JavaScript
/**
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* @licstart The following is the entire license notice for the
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* JavaScript code in this page
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*
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* Copyright 2022 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @licend The above is the entire license notice for the
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* JavaScript code in this page
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*/
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.WaitOnType = exports.EventBus = exports.AutomationEventBus = void 0;
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exports.waitOnEventOrTimeout = waitOnEventOrTimeout;
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const WaitOnType = {
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EVENT: "event",
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TIMEOUT: "timeout"
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};
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exports.WaitOnType = WaitOnType;
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function waitOnEventOrTimeout({
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target,
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name,
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delay = 0
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}) {
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return new Promise(function (resolve, reject) {
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if (typeof target !== "object" || !(name && typeof name === "string") || !(Number.isInteger(delay) && delay >= 0)) {
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throw new Error("waitOnEventOrTimeout - invalid parameters.");
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}
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function handler(type) {
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if (target instanceof EventBus) {
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target._off(name, eventHandler);
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} else {
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target.removeEventListener(name, eventHandler);
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}
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if (timeout) {
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clearTimeout(timeout);
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}
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resolve(type);
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}
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const eventHandler = handler.bind(null, WaitOnType.EVENT);
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if (target instanceof EventBus) {
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target._on(name, eventHandler);
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} else {
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target.addEventListener(name, eventHandler);
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}
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const timeoutHandler = handler.bind(null, WaitOnType.TIMEOUT);
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const timeout = setTimeout(timeoutHandler, delay);
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});
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}
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class EventBus {
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constructor() {
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this._listeners = Object.create(null);
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}
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on(eventName, listener, options = null) {
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this._on(eventName, listener, {
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external: true,
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once: options?.once
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});
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}
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off(eventName, listener, options = null) {
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this._off(eventName, listener, {
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external: true,
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once: options?.once
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});
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}
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dispatch(eventName, data) {
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const eventListeners = this._listeners[eventName];
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if (!eventListeners || eventListeners.length === 0) {
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return;
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}
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let externalListeners;
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for (const {
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listener,
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external,
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once
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} of eventListeners.slice(0)) {
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if (once) {
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this._off(eventName, listener);
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}
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if (external) {
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(externalListeners ||= []).push(listener);
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continue;
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}
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listener(data);
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}
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if (externalListeners) {
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for (const listener of externalListeners) {
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listener(data);
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}
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externalListeners = null;
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}
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}
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_on(eventName, listener, options = null) {
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const eventListeners = this._listeners[eventName] ||= [];
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eventListeners.push({
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listener,
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external: options?.external === true,
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once: options?.once === true
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});
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}
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_off(eventName, listener, options = null) {
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const eventListeners = this._listeners[eventName];
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if (!eventListeners) {
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return;
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}
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for (let i = 0, ii = eventListeners.length; i < ii; i++) {
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if (eventListeners[i].listener === listener) {
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eventListeners.splice(i, 1);
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return;
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}
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}
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}
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}
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exports.EventBus = EventBus;
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class AutomationEventBus extends EventBus {
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dispatch(eventName, data) {
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throw new Error("Not implemented: AutomationEventBus.dispatch");
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}
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}
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exports.AutomationEventBus = AutomationEventBus; |