124 lines
4.3 KiB
TypeScript
124 lines
4.3 KiB
TypeScript
/**
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* Copyright 2019 Google Inc. All rights reserved.
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* Modifications copyright (c) Microsoft Corporation.
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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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import { assert, helper } from '../helper';
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import { Page, Worker } from '../page';
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import { CRBrowser, CRBrowserContext } from './crBrowser';
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import { CRSession, CRSessionEvents } from './crConnection';
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import { CRExecutionContext } from './crExecutionContext';
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import { CRPage } from './crPage';
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import { Protocol } from './protocol';
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const targetSymbol = Symbol('target');
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export class CRTarget {
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private readonly _targetInfo: Protocol.Target.TargetInfo;
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private readonly _browser: CRBrowser;
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private readonly _browserContext: CRBrowserContext;
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readonly _targetId: string;
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private readonly _pagePromise: Promise<Page | Error> | null = null;
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readonly _crPage: CRPage | null = null;
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_initializedPage: Page | null = null;
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private readonly _workerPromise: Promise<Worker | Error> | null = null;
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_initializedWorker: Worker | null = null;
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static fromPage(page: Page): CRTarget {
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return (page as any)[targetSymbol];
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}
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static isPageType(type: string): boolean {
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return type === 'page' || type === 'background_page';
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}
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constructor(
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browser: CRBrowser,
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targetInfo: Protocol.Target.TargetInfo,
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browserContext: CRBrowserContext,
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session: CRSession,
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hasInitialAboutBlank: boolean) {
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this._targetInfo = targetInfo;
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this._browser = browser;
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this._browserContext = browserContext;
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this._targetId = targetInfo.targetId;
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if (CRTarget.isPageType(targetInfo.type)) {
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this._crPage = new CRPage(session, this._browser, this._browserContext);
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helper.addEventListener(session, 'Page.windowOpen', event => browser._onWindowOpen(targetInfo.targetId, event));
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const page = this._crPage.page();
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(page as any)[targetSymbol] = this;
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session.once(CRSessionEvents.Disconnected, () => page._didDisconnect());
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this._pagePromise = this._crPage.initialize(hasInitialAboutBlank).then(() => this._initializedPage = page).catch(e => e);
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} else if (targetInfo.type === 'service_worker') {
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this._workerPromise = this._initializeServiceWorker(session);
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} else {
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assert(false, 'Unsupported target type: ' + targetInfo.type);
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}
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}
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_didClose() {
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if (this._crPage)
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this._crPage.didClose();
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}
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async pageOrError(): Promise<Page | Error> {
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if (CRTarget.isPageType(this.type()))
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return this._pagePromise!;
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throw new Error('Not a page.');
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}
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private async _initializeServiceWorker(session: CRSession): Promise<Worker | Error> {
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const worker = new Worker(this._targetInfo.url);
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session.once('Runtime.executionContextCreated', event => {
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worker._createExecutionContext(new CRExecutionContext(session, event.context));
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});
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try {
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// This might fail if the target is closed before we receive all execution contexts.
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await Promise.all([
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session.send('Runtime.enable', {}),
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session.send('Runtime.runIfWaitingForDebugger'),
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]);
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this._initializedWorker = worker;
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return worker;
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} catch (error) {
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return error;
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}
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}
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serviceWorkerOrError(): Promise<Worker | Error> {
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if (this.type() === 'service_worker')
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return this._workerPromise!;
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throw new Error('Not a service worker.');
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}
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type(): 'page' | 'background_page' | 'service_worker' | 'shared_worker' | 'other' | 'browser' {
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const type = this._targetInfo.type;
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if (type === 'page' || type === 'background_page' || type === 'service_worker' || type === 'shared_worker' || type === 'browser')
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return type;
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return 'other';
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}
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context(): CRBrowserContext {
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return this._browserContext;
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}
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opener(): CRTarget | null {
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const { openerId } = this._targetInfo;
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if (!openerId)
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return null;
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return this._browser._targets.get(openerId)!;
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}
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}
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