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/* 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/. */
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
BackupService: "resource:///modules/backup/BackupService.sys.mjs",
});
/**
* A JSWindowActor that is responsible for marshalling information between
* the BackupService singleton and any registered UI widgets that need to
* represent data from that service.
*/
export class BackupUIParent extends JSWindowActorParent {
/**
* A reference to the BackupService singleton instance.
*
* @type {BackupService}
*/
#bs;
/**
* Create a BackupUIParent instance. If a BackupUIParent is instantiated
* before BrowserGlue has a chance to initialize the BackupService, this
* constructor will cause it to initialize first.
*/
constructor() {
super();
// We use init() rather than get(), since it's possible to load
// about:preferences before the service has had a chance to init itself
// via BrowserGlue.
this.#bs = lazy.BackupService.init();
}
/**
* Called once the BackupUIParent/BackupUIChild pair have been connected.
*/
actorCreated() {
this.#bs.addEventListener("BackupService:StateUpdate", this);
}
/**
* Called once the BackupUIParent/BackupUIChild pair have been disconnected.
*/
didDestroy() {
this.#bs.removeEventListener("BackupService:StateUpdate", this);
}
/**
* Handles events fired by the BackupService.
*
* @param {Event} event
* The event that the BackupService emitted.
*/
handleEvent(event) {
if (event.type == "BackupService:StateUpdate") {
this.sendState();
}
}
/**
* Handles messages sent by BackupUIChild.
*
* @param {ReceiveMessageArgument} message
* The message received from the BackupUIChild.
*/
receiveMessage(message) {
if (message.name == "RequestState") {
this.sendState();
}
}
/**
* Sends the StateUpdate message to the BackupUIChild, along with the most
* recent state object from BackupService.
*/
sendState() {
this.sendAsyncMessage("StateUpdate", { state: this.#bs.state });
}
}
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