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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
import { ContentProcessDomain } from "chrome://remote/content/cdp/domains/ContentProcessDomain.sys.mjs";
export class Input extends ContentProcessDomain {
constructor(session) {
super(session);
// Internal id used to track existing event handlers.
this._eventId = 0;
// Map of event id -> event handler promise.
this._eventPromises = new Map();
}
/**
* Internal methods: the following methods are not part of CDP;
* note the _ prefix.
*/
/**
* Add an event listener in the content page for the provided eventName.
* This method will return a unique handler id that can be used to wait
* for the event.
*
* Example usage from a parent process domain:
*
* const id = await this.executeInChild("_addContentEventListener", "click");
* // do something that triggers a click in content
* await this.executeInChild("_waitForContentEvent", id);
*/
_addContentEventListener(eventName) {
const eventPromise = new Promise(resolve => {
this.chromeEventHandler.addEventListener(eventName, resolve, {
mozSystemGroup: true,
once: true,
});
});
this._eventId++;
this._eventPromises.set(this._eventId, eventPromise);
return this._eventId;
}
/**
* Wait for an event listener added via `addContentEventListener` to be fired.
*/
async _waitForContentEvent(eventId) {
const eventPromise = this._eventPromises.get(eventId);
if (!eventPromise) {
throw new Error("No event promise found for id " + eventId);
}
await eventPromise;
this._eventPromises.delete(eventId);
}
}