diff options
Diffstat (limited to 'remote/shared/messagehandler/test/browser/resources/modules/windowglobal/eventemitter.sys.mjs')
-rw-r--r-- | remote/shared/messagehandler/test/browser/resources/modules/windowglobal/eventemitter.sys.mjs | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/remote/shared/messagehandler/test/browser/resources/modules/windowglobal/eventemitter.sys.mjs b/remote/shared/messagehandler/test/browser/resources/modules/windowglobal/eventemitter.sys.mjs new file mode 100644 index 0000000000..c86954c5e0 --- /dev/null +++ b/remote/shared/messagehandler/test/browser/resources/modules/windowglobal/eventemitter.sys.mjs @@ -0,0 +1,81 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +import { Module } from "chrome://remote/content/shared/messagehandler/Module.sys.mjs"; + +class EventEmitterModule extends Module { + #isSubscribed; + #subscribedEvents; + + constructor(messageHandler) { + super(messageHandler); + this.#isSubscribed = false; + this.#subscribedEvents = new Set(); + } + + destroy() {} + + /** + * Commands + */ + + emitTestEvent() { + if (this.#isSubscribed) { + const text = `event from ${this.messageHandler.contextId}`; + this.emitEvent("eventemitter.testEvent", { text }); + } + + // Emit another event consistently for monitoring during the test. + this.emitEvent("eventemitter.monitoringEvent", {}); + } + + isSubscribed() { + return this.#isSubscribed; + } + + _applySessionData(params) { + const { category } = params; + if (category === "event") { + const filteredSessionData = params.sessionData.filter(item => + this.messageHandler.matchesContext(item.contextDescriptor) + ); + for (const event of this.#subscribedEvents.values()) { + const hasSessionItem = filteredSessionData.some( + item => item.value === event + ); + // If there are no session items for this context, we should unsubscribe from the event. + if (!hasSessionItem) { + this.#unsubscribeEvent(event); + } + } + + // Subscribe to all events, which have an item in SessionData + for (const { value } of filteredSessionData) { + this.#subscribeEvent(value); + } + } + } + + #subscribeEvent(event) { + if (event === "eventemitter.testEvent") { + if (this.#isSubscribed) { + throw new Error("Already subscribed to eventemitter.testEvent"); + } + this.#isSubscribed = true; + this.#subscribedEvents.add(event); + } + } + + #unsubscribeEvent(event) { + if (event === "eventemitter.testEvent") { + if (!this.#isSubscribed) { + throw new Error("Not subscribed to eventemitter.testEvent"); + } + this.#isSubscribed = false; + this.#subscribedEvents.delete(event); + } + } +} + +export const eventemitter = EventEmitterModule; |