101 lines
3.2 KiB
JavaScript
101 lines
3.2 KiB
JavaScript
'use strict'
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const ipcRenderer = require('@electron/internal/renderer/ipc-renderer-internal')
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const { runInThisContext } = require('vm')
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// Check whether pattern matches.
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// https://developer.chrome.com/extensions/match_patterns
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const matchesPattern = function (pattern) {
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if (pattern === '<all_urls>') return true
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const regexp = new RegExp(`^${pattern.replace(/\*/g, '.*')}$`)
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const url = `${location.protocol}//${location.host}${location.pathname}`
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return url.match(regexp)
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}
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// Run the code with chrome API integrated.
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const runContentScript = function (extensionId, url, code) {
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const context = {}
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require('@electron/internal/renderer/chrome-api').injectTo(extensionId, false, context)
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const wrapper = `((chrome) => {\n ${code}\n })`
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const compiledWrapper = runInThisContext(wrapper, {
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filename: url,
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lineOffset: 1,
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displayErrors: true
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})
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return compiledWrapper.call(this, context.chrome)
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}
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const runAllContentScript = function (scripts, extensionId) {
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for (const { url, code } of scripts) {
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runContentScript.call(window, extensionId, url, code)
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}
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}
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const runStylesheet = function (url, code) {
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const wrapper = `((code) => {
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function init() {
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const styleElement = document.createElement('style');
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styleElement.textContent = code;
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document.head.append(styleElement);
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}
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document.addEventListener('DOMContentLoaded', init);
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})`
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const compiledWrapper = runInThisContext(wrapper, {
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filename: url,
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lineOffset: 1,
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displayErrors: true
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})
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return compiledWrapper.call(this, code)
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}
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const runAllStylesheet = function (css) {
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for (const { url, code } of css) {
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runStylesheet.call(window, url, code)
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}
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}
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// Run injected scripts.
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// https://developer.chrome.com/extensions/content_scripts
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const injectContentScript = function (extensionId, script) {
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if (!script.matches.some(matchesPattern)) return
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if (script.js) {
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const fire = runAllContentScript.bind(window, script.js, extensionId)
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if (script.runAt === 'document_start') {
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process.once('document-start', fire)
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} else if (script.runAt === 'document_end') {
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process.once('document-end', fire)
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} else {
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document.addEventListener('DOMContentLoaded', fire)
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}
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}
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if (script.css) {
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const fire = runAllStylesheet.bind(window, script.css)
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if (script.runAt === 'document_start') {
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process.once('document-start', fire)
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} else if (script.runAt === 'document_end') {
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process.once('document-end', fire)
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} else {
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document.addEventListener('DOMContentLoaded', fire)
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}
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}
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}
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// Handle the request of chrome.tabs.executeJavaScript.
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ipcRenderer.on('CHROME_TABS_EXECUTESCRIPT', function (event, senderWebContentsId, requestId, extensionId, url, code) {
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const result = runContentScript.call(window, extensionId, url, code)
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ipcRenderer.sendToAll(senderWebContentsId, `CHROME_TABS_EXECUTESCRIPT_RESULT_${requestId}`, result)
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})
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// Read the renderer process preferences.
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const preferences = process.getRenderProcessPreferences()
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if (preferences) {
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for (const pref of preferences) {
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if (pref.contentScripts) {
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for (const script of pref.contentScripts) {
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injectContentScript(pref.extensionId, script)
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}
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}
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}
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}
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