mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
90 lines
3.1 KiB
JavaScript
90 lines
3.1 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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class EmulationManager {
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/**
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* @param {!Puppeteer.CDPSession} client
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*/
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constructor(client) {
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this._client = client;
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this._emulatingMobile = false;
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this._injectedTouchScriptId = null;
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}
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/**
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* @param {!EmulationManager.Viewport} viewport
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* @return {Promise<boolean>}
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*/
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async emulateViewport(viewport) {
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const mobile = viewport.isMobile || 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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/** @type {Protocol.Emulation.ScreenOrientation} */
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const screenOrientation = viewport.isLandscape ? { angle: 90, type: 'landscapePrimary' } : { angle: 0, type: 'portraitPrimary' };
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await Promise.all([
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this._client.send('Emulation.setDeviceMetricsOverride', { mobile, width, height, deviceScaleFactor, screenOrientation }),
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this._client.send('Emulation.setTouchEmulationEnabled', {
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enabled: viewport.hasTouch || false
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})
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]);
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let reloadNeeded = false;
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if (viewport.hasTouch && !this._injectedTouchScriptId) {
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const source = `(${injectedTouchEventsFunction})()`;
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this._injectedTouchScriptId = (await this._client.send('Page.addScriptToEvaluateOnNewDocument', { source })).identifier;
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reloadNeeded = true;
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} else if (!viewport.hasTouch && this._injectedTouchScriptId) {
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await this._client.send('Page.removeScriptToEvaluateOnNewDocument', {identifier: this._injectedTouchScriptId});
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this._injectedTouchScriptId = null;
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reloadNeeded = true;
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}
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if (this._emulatingMobile !== mobile)
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reloadNeeded = true;
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this._emulatingMobile = mobile;
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return reloadNeeded;
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function injectedTouchEventsFunction() {
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const touchEvents = ['ontouchstart', 'ontouchend', 'ontouchmove', 'ontouchcancel'];
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// @ts-ignore
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const recipients = [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 < recipients.length; ++j) {
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if (!(touchEvents[i] in recipients[j])) {
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Object.defineProperty(recipients[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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}
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}
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/**
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* @typedef {Object} EmulationManager.Viewport
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* @property {number} width
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* @property {number} height
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* @property {number=} deviceScaleFactor
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* @property {boolean=} isMobile
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* @property {boolean=} isLandscape
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* @property {boolean=} hasTouch
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*/
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module.exports = EmulationManager;
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