76ac3bded5
This patch converts lib/DevicesDescriptors from a devtools front-end format into a puppeteer format. This patch does this via introducing a scripts utils/fetch_devices.js which grabs devices from upstream of DevTools Front-end and converts them into puppeteer devices. References #88.
108 lines
3.8 KiB
JavaScript
108 lines
3.8 KiB
JavaScript
/**
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* Copyright 2017 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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const DeviceDescriptors = require('./DeviceDescriptors');
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class EmulationManager {
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/**
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* @return {!Promise<!Array<string>>}
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*/
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static deviceNames() {
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return Promise.resolve(DeviceDescriptors.map(device => device.name));
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}
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/**
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* @param {string} name
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* @param {!Object=} options
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* @return {!Page.Viewport}
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*/
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static deviceViewport(name) {
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const device = DeviceDescriptors.find(device => device.name === name);
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if (!device)
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throw new Error(`Unable to emulate ${name}, no such device metrics in the library.`);
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return device.viewport;
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}
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/**
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* @param {string} name
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*/
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static deviceUserAgent(name) {
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const device = DeviceDescriptors.find(device => device.name === name);
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if (!device)
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throw new Error(`Unable to emulate ${name}, no such device metrics in the library.`);
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return device.userAgent;
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}
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/**
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* @param {!Connection} client
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* @param {!Page.Viewport} viewport
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* @return {Promise<boolean>}
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*/
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static async emulateViewport(client, viewport) {
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const mobile = viewport.isMobile || false;
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const landscape = viewport.isLandscape || false;
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const width = viewport.width;
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const height = viewport.height;
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const deviceScaleFactor = viewport.deviceScaleFactor || 1;
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const screenOrientation = landscape ? { angle: 90, type: 'landscapePrimary' } : { angle: 0, type: 'portraitPrimary' };
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await Promise.all([
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client.send('Emulation.setDeviceMetricsOverride', { mobile, width, height, deviceScaleFactor, screenOrientation }),
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client.send('Emulation.setTouchEmulationEnabled', {
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enabled: viewport.hasTouch || false,
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configuration: viewport.isMobile ? 'mobile' : 'desktop'
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})
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]);
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let reloadNeeded = false;
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if (viewport.hasTouch && !client[EmulationManager._touchScriptId]) {
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const source = `(${injectedTouchEventsFunction})()`;
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client[EmulationManager._touchScriptId] = (await client.send('Page.addScriptToEvaluateOnNewDocument', { source })).identifier;
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reloadNeeded = true;
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}
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if (!viewport.hasTouch && client[EmulationManager._touchScriptId]) {
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await client.send('Page.removeScriptToEvaluateOnNewDocument', {identifier: client[EmulationManager._touchScriptId]});
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client[EmulationManager._touchScriptId] = null;
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reloadNeeded = true;
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}
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if (client[EmulationManager._emulatingMobile] !== mobile)
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reloadNeeded = true;
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client[EmulationManager._emulatingMobile] = mobile;
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function injectedTouchEventsFunction() {
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const touchEvents = ['ontouchstart', 'ontouchend', 'ontouchmove', 'ontouchcancel'];
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const recepients = [window.__proto__, document.__proto__];
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for (let i = 0; i < touchEvents.length; ++i) {
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for (let j = 0; j < recepients.length; ++j) {
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if (!(touchEvents[i] in recepients[j])) {
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Object.defineProperty(recepients[j], touchEvents[i], {
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value: null, writable: true, configurable: true, enumerable: true
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});
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}
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}
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}
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}
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return reloadNeeded;
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}
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}
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EmulationManager._touchScriptId = Symbol('emulatingTouchScriptId');
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EmulationManager._emulatingMobile = Symbol('emulatingMobile');
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module.exports = EmulationManager;
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