457 lines
18 KiB
JavaScript
457 lines
18 KiB
JavaScript
"use strict";
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/**
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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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Object.defineProperty(exports, "__esModule", { value: true });
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exports.ElementHandle = exports.JSHandle = exports.createJSHandle = void 0;
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const helper_1 = require("./helper");
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const QueryHandler_1 = require("./QueryHandler");
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function createJSHandle(context, remoteObject) {
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const frame = context.frame();
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if (remoteObject.subtype === 'node' && frame) {
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const frameManager = frame._frameManager;
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return new ElementHandle(context, context._client, remoteObject, frameManager.page(), frameManager);
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}
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return new JSHandle(context, context._client, remoteObject);
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}
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exports.createJSHandle = createJSHandle;
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class JSHandle {
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constructor(context, client, remoteObject) {
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this._disposed = false;
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this._context = context;
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this._client = client;
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this._remoteObject = remoteObject;
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}
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executionContext() {
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return this._context;
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}
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async evaluate(pageFunction, ...args) {
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return await this.executionContext().evaluate(pageFunction, this, ...args);
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}
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async evaluateHandle(pageFunction, ...args) {
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return await this.executionContext().evaluateHandle(pageFunction, this, ...args);
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}
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async getProperty(propertyName) {
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const objectHandle = await this.evaluateHandle((object, propertyName) => {
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const result = { __proto__: null };
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result[propertyName] = object[propertyName];
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return result;
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}, propertyName);
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const properties = await objectHandle.getProperties();
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const result = properties.get(propertyName) || null;
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await objectHandle.dispose();
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return result;
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}
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async getProperties() {
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const response = await this._client.send('Runtime.getProperties', {
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objectId: this._remoteObject.objectId,
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ownProperties: true,
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});
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const result = new Map();
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for (const property of response.result) {
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if (!property.enumerable)
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continue;
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result.set(property.name, createJSHandle(this._context, property.value));
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}
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return result;
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}
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async jsonValue() {
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if (this._remoteObject.objectId) {
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const response = await this._client.send('Runtime.callFunctionOn', {
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functionDeclaration: 'function() { return this; }',
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objectId: this._remoteObject.objectId,
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returnByValue: true,
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awaitPromise: true,
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});
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return helper_1.helper.valueFromRemoteObject(response.result);
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}
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return helper_1.helper.valueFromRemoteObject(this._remoteObject);
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}
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/* This always returns null but children can define this and return an ElementHandle */
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asElement() {
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return null;
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}
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async dispose() {
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if (this._disposed)
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return;
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this._disposed = true;
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await helper_1.helper.releaseObject(this._client, this._remoteObject);
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}
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toString() {
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if (this._remoteObject.objectId) {
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const type = this._remoteObject.subtype || this._remoteObject.type;
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return 'JSHandle@' + type;
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}
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return 'JSHandle:' + helper_1.helper.valueFromRemoteObject(this._remoteObject);
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}
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}
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exports.JSHandle = JSHandle;
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class ElementHandle extends JSHandle {
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constructor(context, client, remoteObject, page, frameManager) {
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super(context, client, remoteObject);
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this._client = client;
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this._remoteObject = remoteObject;
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this._page = page;
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this._frameManager = frameManager;
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}
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asElement() {
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return this;
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}
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async contentFrame() {
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const nodeInfo = await this._client.send('DOM.describeNode', {
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objectId: this._remoteObject.objectId,
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});
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if (typeof nodeInfo.node.frameId !== 'string')
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return null;
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return this._frameManager.frame(nodeInfo.node.frameId);
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}
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async _scrollIntoViewIfNeeded() {
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const error = await this.evaluate(async (element, pageJavascriptEnabled) => {
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if (!element.isConnected)
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return 'Node is detached from document';
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if (element.nodeType !== Node.ELEMENT_NODE)
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return 'Node is not of type HTMLElement';
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// force-scroll if page's javascript is disabled.
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if (!pageJavascriptEnabled) {
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element.scrollIntoView({
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block: 'center',
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inline: 'center',
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// Chrome still supports behavior: instant but it's not in the spec so TS shouts
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// We don't want to make this breaking change in Puppeteer yet so we'll ignore the line.
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// @ts-ignore
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behavior: 'instant',
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});
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return false;
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}
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const visibleRatio = await new Promise((resolve) => {
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const observer = new IntersectionObserver((entries) => {
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resolve(entries[0].intersectionRatio);
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observer.disconnect();
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});
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observer.observe(element);
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});
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if (visibleRatio !== 1.0) {
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element.scrollIntoView({
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block: 'center',
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inline: 'center',
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// Chrome still supports behavior: instant but it's not in the spec so TS shouts
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// We don't want to make this breaking change in Puppeteer yet so we'll ignore the line.
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// @ts-ignore
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behavior: 'instant',
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});
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}
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return false;
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}, this._page._javascriptEnabled);
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if (error)
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throw new Error(error);
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}
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async _clickablePoint() {
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const [result, layoutMetrics] = await Promise.all([
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this._client
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.send('DOM.getContentQuads', {
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objectId: this._remoteObject.objectId,
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})
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.catch(helper_1.debugError),
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this._client.send('Page.getLayoutMetrics'),
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]);
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if (!result || !result.quads.length)
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throw new Error('Node is either not visible or not an HTMLElement');
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// Filter out quads that have too small area to click into.
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const { clientWidth, clientHeight } = layoutMetrics.layoutViewport;
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const quads = result.quads
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.map((quad) => this._fromProtocolQuad(quad))
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.map((quad) => this._intersectQuadWithViewport(quad, clientWidth, clientHeight))
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.filter((quad) => computeQuadArea(quad) > 1);
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if (!quads.length)
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throw new Error('Node is either not visible or not an HTMLElement');
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// Return the middle point of the first quad.
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const quad = quads[0];
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let x = 0;
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let y = 0;
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for (const point of quad) {
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x += point.x;
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y += point.y;
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}
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return {
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x: x / 4,
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y: y / 4,
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};
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}
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_getBoxModel() {
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return this._client
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.send('DOM.getBoxModel', {
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objectId: this._remoteObject.objectId,
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})
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.catch((error) => helper_1.debugError(error));
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}
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_fromProtocolQuad(quad) {
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return [
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{ x: quad[0], y: quad[1] },
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{ x: quad[2], y: quad[3] },
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{ x: quad[4], y: quad[5] },
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{ x: quad[6], y: quad[7] },
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];
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}
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_intersectQuadWithViewport(quad, width, height) {
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return quad.map((point) => ({
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x: Math.min(Math.max(point.x, 0), width),
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y: Math.min(Math.max(point.y, 0), height),
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}));
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}
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async hover() {
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await this._scrollIntoViewIfNeeded();
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const { x, y } = await this._clickablePoint();
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await this._page.mouse.move(x, y);
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}
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async click(options) {
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await this._scrollIntoViewIfNeeded();
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const { x, y } = await this._clickablePoint();
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await this._page.mouse.click(x, y, options);
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}
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async select(...values) {
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for (const value of values)
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helper_1.assert(helper_1.helper.isString(value), 'Values must be strings. Found value "' +
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value +
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'" of type "' +
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typeof value +
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'"');
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/* TODO(jacktfranklin@): once ExecutionContext is TypeScript, and
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* its evaluate function is properly typed with generics we can
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* return here and remove the typecasting
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*/
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return this.evaluate((element, values) => {
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if (element.nodeName.toLowerCase() !== 'select')
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throw new Error('Element is not a <select> element.');
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const options = Array.from(element.options);
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element.value = undefined;
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for (const option of options) {
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option.selected = values.includes(option.value);
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if (option.selected && !element.multiple)
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break;
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}
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element.dispatchEvent(new Event('input', { bubbles: true }));
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element.dispatchEvent(new Event('change', { bubbles: true }));
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return options
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.filter((option) => option.selected)
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.map((option) => option.value);
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}, values);
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}
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async uploadFile(...filePaths) {
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const isMultiple = await this.evaluate((element) => element.multiple);
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helper_1.assert(filePaths.length <= 1 || isMultiple, 'Multiple file uploads only work with <input type=file multiple>');
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// This import is only needed for `uploadFile`, so keep it scoped here to avoid paying
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// the cost unnecessarily.
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// eslint-disable-next-line @typescript-eslint/no-var-requires
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const path = require('path');
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// eslint-disable-next-line @typescript-eslint/no-var-requires
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const fs = require('fs');
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// eslint-disable-next-line @typescript-eslint/no-var-requires
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const { promisify } = require('util');
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const access = promisify(fs.access);
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// Locate all files and confirm that they exist.
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const files = await Promise.all(filePaths.map(async (filePath) => {
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const resolvedPath = path.resolve(filePath);
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try {
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await access(resolvedPath, fs.constants.R_OK);
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}
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catch (error) {
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if (error.code === 'ENOENT')
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throw new Error(`${filePath} does not exist or is not readable`);
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}
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return resolvedPath;
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}));
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const { objectId } = this._remoteObject;
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const { node } = await this._client.send('DOM.describeNode', { objectId });
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const { backendNodeId } = node;
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// The zero-length array is a special case, it seems that DOM.setFileInputFiles does
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// not actually update the files in that case, so the solution is to eval the element
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// value to a new FileList directly.
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if (files.length === 0) {
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await this.evaluate((element) => {
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element.files = new DataTransfer().files;
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// Dispatch events for this case because it should behave akin to a user action.
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element.dispatchEvent(new Event('input', { bubbles: true }));
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element.dispatchEvent(new Event('change', { bubbles: true }));
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});
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}
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else {
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await this._client.send('DOM.setFileInputFiles', {
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objectId,
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files,
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backendNodeId,
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});
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}
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}
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async tap() {
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await this._scrollIntoViewIfNeeded();
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const { x, y } = await this._clickablePoint();
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await this._page.touchscreen.tap(x, y);
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}
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async focus() {
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await this.evaluate((element) => element.focus());
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}
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async type(text, options) {
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await this.focus();
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await this._page.keyboard.type(text, options);
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}
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async press(key, options) {
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await this.focus();
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await this._page.keyboard.press(key, options);
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}
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async boundingBox() {
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const result = await this._getBoxModel();
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if (!result)
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return null;
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const quad = result.model.border;
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const x = Math.min(quad[0], quad[2], quad[4], quad[6]);
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const y = Math.min(quad[1], quad[3], quad[5], quad[7]);
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const width = Math.max(quad[0], quad[2], quad[4], quad[6]) - x;
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const height = Math.max(quad[1], quad[3], quad[5], quad[7]) - y;
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return { x, y, width, height };
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}
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/**
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* @return {!Promise<?BoxModel>}
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*/
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async boxModel() {
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const result = await this._getBoxModel();
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if (!result)
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return null;
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const { content, padding, border, margin, width, height } = result.model;
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return {
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content: this._fromProtocolQuad(content),
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padding: this._fromProtocolQuad(padding),
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border: this._fromProtocolQuad(border),
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margin: this._fromProtocolQuad(margin),
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width,
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height,
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};
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}
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async screenshot(options = {}) {
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let needsViewportReset = false;
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let boundingBox = await this.boundingBox();
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helper_1.assert(boundingBox, 'Node is either not visible or not an HTMLElement');
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const viewport = this._page.viewport();
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if (viewport &&
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(boundingBox.width > viewport.width ||
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boundingBox.height > viewport.height)) {
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const newViewport = {
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width: Math.max(viewport.width, Math.ceil(boundingBox.width)),
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height: Math.max(viewport.height, Math.ceil(boundingBox.height)),
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};
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await this._page.setViewport(Object.assign({}, viewport, newViewport));
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needsViewportReset = true;
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}
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await this._scrollIntoViewIfNeeded();
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boundingBox = await this.boundingBox();
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helper_1.assert(boundingBox, 'Node is either not visible or not an HTMLElement');
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helper_1.assert(boundingBox.width !== 0, 'Node has 0 width.');
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helper_1.assert(boundingBox.height !== 0, 'Node has 0 height.');
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const { layoutViewport: { pageX, pageY }, } = await this._client.send('Page.getLayoutMetrics');
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const clip = Object.assign({}, boundingBox);
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clip.x += pageX;
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clip.y += pageY;
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const imageData = await this._page.screenshot(Object.assign({}, {
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clip,
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}, options));
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if (needsViewportReset)
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await this._page.setViewport(viewport);
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return imageData;
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}
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async $(selector) {
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const defaultHandler = (element, selector) => element.querySelector(selector);
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const { updatedSelector, queryHandler } = QueryHandler_1.getQueryHandlerAndSelector(selector, defaultHandler);
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const handle = await this.evaluateHandle(queryHandler, updatedSelector);
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const element = handle.asElement();
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if (element)
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return element;
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await handle.dispose();
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return null;
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}
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async $$(selector) {
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const defaultHandler = (element, selector) => element.querySelectorAll(selector);
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const { updatedSelector, queryHandler } = QueryHandler_1.getQueryHandlerAndSelector(selector, defaultHandler);
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const arrayHandle = await this.evaluateHandle(queryHandler, updatedSelector);
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const properties = await arrayHandle.getProperties();
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await arrayHandle.dispose();
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const result = [];
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for (const property of properties.values()) {
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const elementHandle = property.asElement();
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if (elementHandle)
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result.push(elementHandle);
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}
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return result;
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}
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async $eval(selector, pageFunction, ...args) {
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const elementHandle = await this.$(selector);
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if (!elementHandle)
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throw new Error(`Error: failed to find element matching selector "${selector}"`);
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const result = await elementHandle.evaluate(pageFunction, ...args);
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await elementHandle.dispose();
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return result;
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}
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async $$eval(selector, pageFunction, ...args) {
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const defaultHandler = (element, selector) => Array.from(element.querySelectorAll(selector));
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const { updatedSelector, queryHandler } = QueryHandler_1.getQueryHandlerAndSelector(selector, defaultHandler);
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const arrayHandle = await this.evaluateHandle(queryHandler, updatedSelector);
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const result = await arrayHandle.evaluate(pageFunction, ...args);
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await arrayHandle.dispose();
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return result;
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}
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async $x(expression) {
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const arrayHandle = await this.evaluateHandle((element, expression) => {
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const document = element.ownerDocument || element;
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const iterator = document.evaluate(expression, element, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE);
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const array = [];
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let item;
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while ((item = iterator.iterateNext()))
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array.push(item);
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return array;
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}, expression);
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const properties = await arrayHandle.getProperties();
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await arrayHandle.dispose();
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const result = [];
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for (const property of properties.values()) {
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const elementHandle = property.asElement();
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if (elementHandle)
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result.push(elementHandle);
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}
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return result;
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}
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async isIntersectingViewport() {
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return await this.evaluate(async (element) => {
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const visibleRatio = await new Promise((resolve) => {
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const observer = new IntersectionObserver((entries) => {
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resolve(entries[0].intersectionRatio);
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observer.disconnect();
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});
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observer.observe(element);
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});
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return visibleRatio > 0;
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});
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}
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}
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exports.ElementHandle = ElementHandle;
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function computeQuadArea(quad) {
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// Compute sum of all directed areas of adjacent triangles
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// https://en.wikipedia.org/wiki/Polygon#Simple_polygons
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let area = 0;
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for (let i = 0; i < quad.length; ++i) {
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const p1 = quad[i];
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const p2 = quad[(i + 1) % quad.length];
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area += (p1.x * p2.y - p2.x * p1.y) / 2;
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}
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return Math.abs(area);
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}
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