754 lines
21 KiB
TypeScript
754 lines
21 KiB
TypeScript
/**
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* Copyright 2019 Google Inc. All rights reserved.
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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 * as fs from 'fs';
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import { helper, assert } from './helper';
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import { LifecycleWatcher, PuppeteerLifeCycleEvent } from './LifecycleWatcher';
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import { TimeoutError } from './Errors';
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import { JSHandle, ElementHandle } from './JSHandle';
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import { ExecutionContext } from './ExecutionContext';
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import { TimeoutSettings } from './TimeoutSettings';
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import { MouseButtonInput } from './Input';
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import { FrameManager, Frame } from './FrameManager';
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import { getQueryHandlerAndSelector, QueryHandler } from './QueryHandler';
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// This predicateQueryHandler is declared here so that TypeScript knows about it
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// when it is used in the predicate function below.
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declare const predicateQueryHandler: QueryHandler;
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const readFileAsync = helper.promisify(fs.readFile);
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export interface WaitForSelectorOptions {
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visible?: boolean;
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hidden?: boolean;
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timeout?: number;
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}
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export class DOMWorld {
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_frameManager: FrameManager;
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_frame: Frame;
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_timeoutSettings: TimeoutSettings;
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_documentPromise?: Promise<ElementHandle> = null;
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_contextPromise?: Promise<ExecutionContext> = null;
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_contextResolveCallback?: (x?: ExecutionContext) => void = null;
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_detached = false;
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_waitTasks = new Set<WaitTask>();
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constructor(
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frameManager: FrameManager,
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frame: Frame,
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timeoutSettings: TimeoutSettings
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) {
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this._frameManager = frameManager;
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this._frame = frame;
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this._timeoutSettings = timeoutSettings;
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this._setContext(null);
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}
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frame(): Frame {
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return this._frame;
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}
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/**
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* @param {?ExecutionContext} context
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*/
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_setContext(context?: ExecutionContext): void {
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if (context) {
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this._contextResolveCallback.call(null, context);
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this._contextResolveCallback = null;
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for (const waitTask of this._waitTasks) waitTask.rerun();
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} else {
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this._documentPromise = null;
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this._contextPromise = new Promise((fulfill) => {
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this._contextResolveCallback = fulfill;
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});
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}
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}
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_hasContext(): boolean {
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return !this._contextResolveCallback;
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}
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_detach(): void {
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this._detached = true;
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for (const waitTask of this._waitTasks)
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waitTask.terminate(
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new Error('waitForFunction failed: frame got detached.')
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);
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}
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/**
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* @returns {!Promise<!ExecutionContext>}
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*/
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executionContext(): Promise<ExecutionContext> {
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if (this._detached)
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throw new Error(
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`Execution Context is not available in detached frame "${this._frame.url()}" (are you trying to evaluate?)`
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);
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return this._contextPromise;
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}
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/**
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* @param {Function|string} pageFunction
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* @param {!Array<*>} args
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* @returns {!Promise<!JSHandle>}
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*/
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async evaluateHandle(
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pageFunction: Function | string,
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...args: unknown[]
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): Promise<JSHandle> {
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const context = await this.executionContext();
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return context.evaluateHandle(pageFunction, ...args);
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}
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/**
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* @param {Function|string} pageFunction
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* @param {!Array<*>} args
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* @returns {!Promise<*>}
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*/
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async evaluate<ReturnType extends any>(
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pageFunction: Function | string,
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...args: unknown[]
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): Promise<ReturnType> {
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const context = await this.executionContext();
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return context.evaluate<ReturnType>(pageFunction, ...args);
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}
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/**
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* @param {string} selector
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* @returns {!Promise<?ElementHandle>}
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*/
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async $(selector: string): Promise<ElementHandle | null> {
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const document = await this._document();
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const value = await document.$(selector);
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return value;
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}
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async _document(): Promise<ElementHandle> {
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if (this._documentPromise) return this._documentPromise;
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this._documentPromise = this.executionContext().then(async (context) => {
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const document = await context.evaluateHandle('document');
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return document.asElement();
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});
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return this._documentPromise;
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}
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async $x(expression: string): Promise<ElementHandle[]> {
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const document = await this._document();
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const value = await document.$x(expression);
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return value;
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}
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async $eval<ReturnType extends any>(
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selector: string,
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pageFunction: Function | string,
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...args: unknown[]
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): Promise<ReturnType> {
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const document = await this._document();
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return document.$eval<ReturnType>(selector, pageFunction, ...args);
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}
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async $$eval<ReturnType extends any>(
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selector: string,
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pageFunction: Function | string,
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...args: unknown[]
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): Promise<ReturnType> {
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const document = await this._document();
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const value = await document.$$eval<ReturnType>(
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selector,
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pageFunction,
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...args
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);
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return value;
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}
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/**
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* @param {string} selector
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* @returns {!Promise<!Array<!ElementHandle>>}
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*/
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async $$(selector: string): Promise<ElementHandle[]> {
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const document = await this._document();
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const value = await document.$$(selector);
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return value;
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}
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async content(): Promise<string> {
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return await this.evaluate(() => {
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let retVal = '';
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if (document.doctype)
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retVal = new XMLSerializer().serializeToString(document.doctype);
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if (document.documentElement)
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retVal += document.documentElement.outerHTML;
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return retVal;
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});
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}
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async setContent(
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html: string,
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options: {
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timeout?: number;
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waitUntil?: PuppeteerLifeCycleEvent | PuppeteerLifeCycleEvent[];
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} = {}
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): Promise<void> {
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const {
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waitUntil = ['load'],
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timeout = this._timeoutSettings.navigationTimeout(),
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} = options;
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// We rely upon the fact that document.open() will reset frame lifecycle with "init"
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// lifecycle event. @see https://crrev.com/608658
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await this.evaluate((html) => {
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document.open();
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document.write(html);
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document.close();
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}, html);
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const watcher = new LifecycleWatcher(
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this._frameManager,
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this._frame,
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waitUntil,
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timeout
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);
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const error = await Promise.race([
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watcher.timeoutOrTerminationPromise(),
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watcher.lifecyclePromise(),
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]);
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watcher.dispose();
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if (error) throw error;
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}
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/**
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* @param {!{url?: string, path?: string, content?: string, type?: string}} options
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* @returns {!Promise<!ElementHandle>}
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*/
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async addScriptTag(options: {
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url?: string;
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path?: string;
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content?: string;
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type?: string;
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}): Promise<ElementHandle> {
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const { url = null, path = null, content = null, type = '' } = options;
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if (url !== null) {
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try {
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const context = await this.executionContext();
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return (
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await context.evaluateHandle(addScriptUrl, url, type)
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).asElement();
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} catch (error) {
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throw new Error(`Loading script from ${url} failed`);
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}
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}
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if (path !== null) {
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let contents = await readFileAsync(path, 'utf8');
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contents += '//# sourceURL=' + path.replace(/\n/g, '');
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const context = await this.executionContext();
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return (
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await context.evaluateHandle(addScriptContent, contents, type)
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).asElement();
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}
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if (content !== null) {
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const context = await this.executionContext();
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return (
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await context.evaluateHandle(addScriptContent, content, type)
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).asElement();
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}
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throw new Error(
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'Provide an object with a `url`, `path` or `content` property'
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);
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async function addScriptUrl(
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url: string,
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type: string
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): Promise<HTMLElement> {
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const script = document.createElement('script');
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script.src = url;
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if (type) script.type = type;
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const promise = new Promise((res, rej) => {
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script.onload = res;
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script.onerror = rej;
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});
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document.head.appendChild(script);
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await promise;
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return script;
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}
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function addScriptContent(
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content: string,
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type = 'text/javascript'
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): HTMLElement {
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const script = document.createElement('script');
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script.type = type;
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script.text = content;
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let error = null;
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script.onerror = (e) => (error = e);
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document.head.appendChild(script);
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if (error) throw error;
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return script;
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}
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}
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async addStyleTag(options: {
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url?: string;
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path?: string;
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content?: string;
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}): Promise<ElementHandle> {
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const { url = null, path = null, content = null } = options;
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if (url !== null) {
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try {
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const context = await this.executionContext();
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return (await context.evaluateHandle(addStyleUrl, url)).asElement();
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} catch (error) {
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throw new Error(`Loading style from ${url} failed`);
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}
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}
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if (path !== null) {
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let contents = await readFileAsync(path, 'utf8');
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contents += '/*# sourceURL=' + path.replace(/\n/g, '') + '*/';
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const context = await this.executionContext();
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return (
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await context.evaluateHandle(addStyleContent, contents)
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).asElement();
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}
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if (content !== null) {
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const context = await this.executionContext();
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return (
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await context.evaluateHandle(addStyleContent, content)
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).asElement();
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}
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throw new Error(
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'Provide an object with a `url`, `path` or `content` property'
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);
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async function addStyleUrl(url: string): Promise<HTMLElement> {
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const link = document.createElement('link');
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link.rel = 'stylesheet';
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link.href = url;
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const promise = new Promise((res, rej) => {
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link.onload = res;
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link.onerror = rej;
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});
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document.head.appendChild(link);
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await promise;
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return link;
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}
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async function addStyleContent(content: string): Promise<HTMLElement> {
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const style = document.createElement('style');
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style.type = 'text/css';
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style.appendChild(document.createTextNode(content));
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const promise = new Promise((res, rej) => {
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style.onload = res;
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style.onerror = rej;
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});
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document.head.appendChild(style);
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await promise;
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return style;
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}
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}
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async click(
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selector: string,
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options: { delay?: number; button?: MouseButtonInput; clickCount?: number }
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): Promise<void> {
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const handle = await this.$(selector);
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assert(handle, 'No node found for selector: ' + selector);
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await handle.click(options);
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await handle.dispose();
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}
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async focus(selector: string): Promise<void> {
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const handle = await this.$(selector);
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assert(handle, 'No node found for selector: ' + selector);
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await handle.focus();
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await handle.dispose();
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}
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async hover(selector: string): Promise<void> {
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const handle = await this.$(selector);
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assert(handle, 'No node found for selector: ' + selector);
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await handle.hover();
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await handle.dispose();
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}
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async select(selector: string, ...values: string[]): Promise<string[]> {
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const handle = await this.$(selector);
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assert(handle, 'No node found for selector: ' + selector);
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const result = await handle.select(...values);
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await handle.dispose();
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return result;
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}
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async tap(selector: string): Promise<void> {
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const handle = await this.$(selector);
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assert(handle, 'No node found for selector: ' + selector);
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await handle.tap();
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await handle.dispose();
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}
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async type(
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selector: string,
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text: string,
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options?: { delay: number }
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): Promise<void> {
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const handle = await this.$(selector);
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assert(handle, 'No node found for selector: ' + selector);
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await handle.type(text, options);
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await handle.dispose();
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}
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waitForSelector(
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selector: string,
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options: WaitForSelectorOptions
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): Promise<ElementHandle | null> {
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return this._waitForSelectorOrXPath(selector, false, options);
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}
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waitForXPath(
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xpath: string,
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options: WaitForSelectorOptions
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): Promise<ElementHandle | null> {
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return this._waitForSelectorOrXPath(xpath, true, options);
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}
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waitForFunction(
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pageFunction: Function | string,
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options: { polling?: string | number; timeout?: number } = {},
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...args: unknown[]
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): Promise<JSHandle> {
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const {
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polling = 'raf',
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timeout = this._timeoutSettings.timeout(),
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} = options;
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return new WaitTask(
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this,
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pageFunction,
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undefined,
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'function',
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polling,
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timeout,
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...args
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).promise;
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}
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async title(): Promise<string> {
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return this.evaluate(() => document.title);
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}
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private async _waitForSelectorOrXPath(
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selectorOrXPath: string,
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isXPath: boolean,
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options: WaitForSelectorOptions = {}
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): Promise<ElementHandle | null> {
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const {
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visible: waitForVisible = false,
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hidden: waitForHidden = false,
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timeout = this._timeoutSettings.timeout(),
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} = options;
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const polling = waitForVisible || waitForHidden ? 'raf' : 'mutation';
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const title = `${isXPath ? 'XPath' : 'selector'} "${selectorOrXPath}"${
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waitForHidden ? ' to be hidden' : ''
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}`;
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const {
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updatedSelector,
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queryHandler,
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} = getQueryHandlerAndSelector(selectorOrXPath, (element, selector) =>
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document.querySelector(selector)
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);
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const waitTask = new WaitTask(
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this,
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predicate,
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queryHandler,
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title,
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polling,
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timeout,
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updatedSelector,
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isXPath,
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waitForVisible,
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waitForHidden
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);
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const handle = await waitTask.promise;
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if (!handle.asElement()) {
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await handle.dispose();
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return null;
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}
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return handle.asElement();
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/**
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* @param {string} selectorOrXPath
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* @param {boolean} isXPath
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* @param {boolean} waitForVisible
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* @param {boolean} waitForHidden
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* @returns {?Node|boolean}
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*/
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function predicate(
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selectorOrXPath: string,
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isXPath: boolean,
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waitForVisible: boolean,
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waitForHidden: boolean
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): Node | null | boolean {
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const node = isXPath
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? document.evaluate(
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selectorOrXPath,
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document,
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null,
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XPathResult.FIRST_ORDERED_NODE_TYPE,
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null
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).singleNodeValue
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: predicateQueryHandler
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? (predicateQueryHandler(document, selectorOrXPath) as Element)
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: document.querySelector(selectorOrXPath);
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if (!node) return waitForHidden;
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if (!waitForVisible && !waitForHidden) return node;
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const element =
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node.nodeType === Node.TEXT_NODE
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? node.parentElement
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: (node as Element);
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const style = window.getComputedStyle(element);
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const isVisible =
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style && style.visibility !== 'hidden' && hasVisibleBoundingBox();
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const success =
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waitForVisible === isVisible || waitForHidden === !isVisible;
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return success ? node : null;
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function hasVisibleBoundingBox(): boolean {
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const rect = element.getBoundingClientRect();
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return !!(rect.top || rect.bottom || rect.width || rect.height);
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}
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}
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}
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}
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|
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class WaitTask {
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_domWorld: DOMWorld;
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_polling: string | number;
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_timeout: number;
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_predicateBody: string;
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_args: unknown[];
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_runCount = 0;
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promise: Promise<JSHandle>;
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_resolve: (x: JSHandle) => void;
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_reject: (x: Error) => void;
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_timeoutTimer?: NodeJS.Timeout;
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_terminated = false;
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constructor(
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domWorld: DOMWorld,
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predicateBody: Function | string,
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predicateQueryHandlerBody: Function | string | undefined,
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title: string,
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polling: string | number,
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timeout: number,
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...args: unknown[]
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) {
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if (helper.isString(polling))
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assert(
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polling === 'raf' || polling === 'mutation',
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'Unknown polling option: ' + polling
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);
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else if (helper.isNumber(polling))
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assert(polling > 0, 'Cannot poll with non-positive interval: ' + polling);
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else throw new Error('Unknown polling options: ' + polling);
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|
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function getPredicateBody(
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predicateBody: Function | string,
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predicateQueryHandlerBody: Function | string
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) {
|
|
if (helper.isString(predicateBody)) return `return (${predicateBody});`;
|
|
if (predicateQueryHandlerBody) {
|
|
return `
|
|
return (function wrapper(args) {
|
|
const predicateQueryHandler = ${predicateQueryHandlerBody};
|
|
return (${predicateBody})(...args);
|
|
})(args);`;
|
|
}
|
|
return `return (${predicateBody})(...args);`;
|
|
}
|
|
|
|
this._domWorld = domWorld;
|
|
this._polling = polling;
|
|
this._timeout = timeout;
|
|
this._predicateBody = getPredicateBody(
|
|
predicateBody,
|
|
predicateQueryHandlerBody
|
|
);
|
|
this._args = args;
|
|
this._runCount = 0;
|
|
domWorld._waitTasks.add(this);
|
|
this.promise = new Promise<JSHandle>((resolve, reject) => {
|
|
this._resolve = resolve;
|
|
this._reject = reject;
|
|
});
|
|
// Since page navigation requires us to re-install the pageScript, we should track
|
|
// timeout on our end.
|
|
if (timeout) {
|
|
const timeoutError = new TimeoutError(
|
|
`waiting for ${title} failed: timeout ${timeout}ms exceeded`
|
|
);
|
|
this._timeoutTimer = setTimeout(
|
|
() => this.terminate(timeoutError),
|
|
timeout
|
|
);
|
|
}
|
|
this.rerun();
|
|
}
|
|
|
|
terminate(error: Error): void {
|
|
this._terminated = true;
|
|
this._reject(error);
|
|
this._cleanup();
|
|
}
|
|
|
|
async rerun(): Promise<void> {
|
|
const runCount = ++this._runCount;
|
|
/** @type {?JSHandle} */
|
|
let success = null;
|
|
let error = null;
|
|
try {
|
|
success = await (await this._domWorld.executionContext()).evaluateHandle(
|
|
waitForPredicatePageFunction,
|
|
this._predicateBody,
|
|
this._polling,
|
|
this._timeout,
|
|
...this._args
|
|
);
|
|
} catch (error_) {
|
|
error = error_;
|
|
}
|
|
|
|
if (this._terminated || runCount !== this._runCount) {
|
|
if (success) await success.dispose();
|
|
return;
|
|
}
|
|
|
|
// Ignore timeouts in pageScript - we track timeouts ourselves.
|
|
// If the frame's execution context has already changed, `frame.evaluate` will
|
|
// throw an error - ignore this predicate run altogether.
|
|
if (
|
|
!error &&
|
|
(await this._domWorld.evaluate((s) => !s, success).catch(() => true))
|
|
) {
|
|
await success.dispose();
|
|
return;
|
|
}
|
|
|
|
// When the page is navigated, the promise is rejected.
|
|
// We will try again in the new execution context.
|
|
if (error && error.message.includes('Execution context was destroyed'))
|
|
return;
|
|
|
|
// We could have tried to evaluate in a context which was already
|
|
// destroyed.
|
|
if (
|
|
error &&
|
|
error.message.includes('Cannot find context with specified id')
|
|
)
|
|
return;
|
|
|
|
if (error) this._reject(error);
|
|
else this._resolve(success);
|
|
|
|
this._cleanup();
|
|
}
|
|
|
|
_cleanup(): void {
|
|
clearTimeout(this._timeoutTimer);
|
|
this._domWorld._waitTasks.delete(this);
|
|
}
|
|
}
|
|
|
|
async function waitForPredicatePageFunction(
|
|
predicateBody: string,
|
|
polling: string,
|
|
timeout: number,
|
|
...args: unknown[]
|
|
): Promise<unknown> {
|
|
const predicate = new Function('...args', predicateBody);
|
|
let timedOut = false;
|
|
if (timeout) setTimeout(() => (timedOut = true), timeout);
|
|
if (polling === 'raf') return await pollRaf();
|
|
if (polling === 'mutation') return await pollMutation();
|
|
if (typeof polling === 'number') return await pollInterval(polling);
|
|
|
|
/**
|
|
* @returns {!Promise<*>}
|
|
*/
|
|
async function pollMutation(): Promise<unknown> {
|
|
const success = await predicate(...args);
|
|
if (success) return Promise.resolve(success);
|
|
|
|
let fulfill;
|
|
const result = new Promise((x) => (fulfill = x));
|
|
const observer = new MutationObserver(async () => {
|
|
if (timedOut) {
|
|
observer.disconnect();
|
|
fulfill();
|
|
}
|
|
const success = await predicate(...args);
|
|
if (success) {
|
|
observer.disconnect();
|
|
fulfill(success);
|
|
}
|
|
});
|
|
observer.observe(document, {
|
|
childList: true,
|
|
subtree: true,
|
|
attributes: true,
|
|
});
|
|
return result;
|
|
}
|
|
|
|
async function pollRaf(): Promise<unknown> {
|
|
let fulfill;
|
|
const result = new Promise((x) => (fulfill = x));
|
|
await onRaf();
|
|
return result;
|
|
|
|
async function onRaf(): Promise<unknown> {
|
|
if (timedOut) {
|
|
fulfill();
|
|
return;
|
|
}
|
|
const success = await predicate(...args);
|
|
if (success) fulfill(success);
|
|
else requestAnimationFrame(onRaf);
|
|
}
|
|
}
|
|
|
|
async function pollInterval(pollInterval: number): Promise<unknown> {
|
|
let fulfill;
|
|
const result = new Promise((x) => (fulfill = x));
|
|
await onTimeout();
|
|
return result;
|
|
|
|
async function onTimeout(): Promise<unknown> {
|
|
if (timedOut) {
|
|
fulfill();
|
|
return;
|
|
}
|
|
const success = await predicate(...args);
|
|
if (success) fulfill(success);
|
|
else setTimeout(onTimeout, pollInterval);
|
|
}
|
|
}
|
|
}
|