/
init.js
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/
init.js
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'use strict'
/* eslint no-eval: "off" */
/* global binding, Buffer */
const events = require('events')
const { EventEmitter } = events
process.electronBinding = require('@electron/internal/common/electron-binding-setup').electronBindingSetup(binding.get, 'renderer')
const v8Util = process.electronBinding('v8_util')
// Expose Buffer shim as a hidden value. This is used by C++ code to
// deserialize Buffer instances sent from browser process.
v8Util.setHiddenValue(global, 'Buffer', Buffer)
// The `lib/renderer/api/ipc-renderer.ts` module looks for the ipc object in the
// "ipc" hidden value
v8Util.setHiddenValue(global, 'ipc', new EventEmitter())
// The `lib/renderer/ipc-renderer-internal.ts` module looks for the ipc object in the
// "ipc-internal" hidden value
v8Util.setHiddenValue(global, 'ipc-internal', new EventEmitter())
// The process object created by webpack is not an event emitter, fix it so
// the API is more compatible with non-sandboxed renderers.
for (const prop of Object.keys(EventEmitter.prototype)) {
if (process.hasOwnProperty(prop)) {
delete process[prop]
}
}
Object.setPrototypeOf(process, EventEmitter.prototype)
const { ipcRendererInternal } = require('@electron/internal/renderer/ipc-renderer-internal')
const ipcRendererUtils = require('@electron/internal/renderer/ipc-renderer-internal-utils')
const {
contentScripts, preloadScripts, isRemoteModuleEnabled, isWebViewTagEnabled, process: processProps
} = ipcRendererUtils.invokeSync('ELECTRON_BROWSER_SANDBOX_LOAD')
process.isRemoteModuleEnabled = isRemoteModuleEnabled
// The electron module depends on process.electronBinding
const electron = require('electron')
const loadedModules = new Map([
['electron', electron],
['events', events],
['timers', require('timers')],
['url', require('url')]
])
// ElectronApiServiceImpl will look for the "ipcNative" hidden object when
// invoking the 'onMessage' callback.
v8Util.setHiddenValue(global, 'ipcNative', {
onMessage (internal, channel, args, senderId) {
const sender = internal ? ipcRendererInternal : electron.ipcRenderer
sender.emit(channel, { sender, senderId }, ...args)
}
})
// AtomSandboxedRendererClient will look for the "lifecycle" hidden object when
v8Util.setHiddenValue(global, 'lifecycle', {
onLoaded () {
process.emit('loaded')
},
onExit () {
process.emit('exit')
},
onDocumentStart () {
process.emit('document-start')
},
onDocumentEnd () {
process.emit('document-end')
}
})
const { webFrameInit } = require('@electron/internal/renderer/web-frame-init')
webFrameInit()
// Pass different process object to the preload script(which should not have
// access to things like `process.electronBinding`).
const preloadProcess = new EventEmitter()
Object.assign(preloadProcess, binding.process)
Object.assign(preloadProcess, processProps)
Object.assign(process, binding.process)
Object.assign(process, processProps)
Object.defineProperty(preloadProcess, 'noDeprecation', {
get () {
return process.noDeprecation
},
set (value) {
process.noDeprecation = value
}
})
process.on('loaded', () => preloadProcess.emit('loaded'))
process.on('exit', () => preloadProcess.emit('exit'))
// This is the `require` function that will be visible to the preload script
function preloadRequire (module) {
if (loadedModules.has(module)) {
return loadedModules.get(module)
}
throw new Error(`module not found: ${module}`)
}
// Process command line arguments.
const { hasSwitch } = process.electronBinding('command_line')
const contextIsolation = hasSwitch('context-isolation')
switch (window.location.protocol) {
case 'devtools:': {
// Override some inspector APIs.
require('@electron/internal/renderer/inspector')
break
}
case 'chrome-extension:': {
// Inject the chrome.* APIs that chrome extensions require
if (!process.electronBinding('features').isExtensionsEnabled()) {
require('@electron/internal/renderer/chrome-api').injectTo(window.location.hostname, window)
}
break
}
case 'chrome': {
break
}
default: {
// Inject content scripts.
if (!process.electronBinding('features').isExtensionsEnabled()) {
require('@electron/internal/renderer/content-scripts-injector')(contentScripts)
}
}
}
const guestInstanceId = binding.guestInstanceId && parseInt(binding.guestInstanceId)
// Load webview tag implementation.
if (process.isMainFrame) {
const { webViewInit } = require('@electron/internal/renderer/web-view/web-view-init')
webViewInit(contextIsolation, isWebViewTagEnabled, guestInstanceId)
}
const errorUtils = require('@electron/internal/common/error-utils')
// Wrap the script into a function executed in global scope. It won't have
// access to the current scope, so we'll expose a few objects as arguments:
//
// - `require`: The `preloadRequire` function
// - `process`: The `preloadProcess` object
// - `Buffer`: Shim of `Buffer` implementation
// - `global`: The window object, which is aliased to `global` by webpack.
function runPreloadScript (preloadSrc) {
const preloadWrapperSrc = `(function(require, process, Buffer, global, setImmediate, clearImmediate, exports) {
${preloadSrc}
})`
// eval in window scope
const preloadFn = binding.createPreloadScript(preloadWrapperSrc)
const { setImmediate, clearImmediate } = require('timers')
preloadFn(preloadRequire, preloadProcess, Buffer, global, setImmediate, clearImmediate, {})
}
for (const { preloadPath, preloadSrc, preloadError } of preloadScripts) {
try {
if (preloadSrc) {
runPreloadScript(preloadSrc)
} else if (preloadError) {
throw errorUtils.deserialize(preloadError)
}
} catch (error) {
console.error(`Unable to load preload script: ${preloadPath}`)
console.error(error)
ipcRendererInternal.send('ELECTRON_BROWSER_PRELOAD_ERROR', preloadPath, errorUtils.serialize(error))
}
}
// Warn about security issues
if (process.isMainFrame) {
const { securityWarnings } = require('@electron/internal/renderer/security-warnings')
securityWarnings()
}