fix: load window-setup in sandboxed renderer (#21416)

filenames.auto.gni

@@ -165,6 +165,7 @@ auto_filenames = {
     "lib/renderer/web-view/web-view-element.ts",
     "lib/renderer/web-view/web-view-impl.ts",
     "lib/renderer/web-view/web-view-init.ts",
+    "lib/renderer/window-setup.ts",
     "lib/sandboxed_renderer/api/exports/electron.ts",
     "lib/sandboxed_renderer/api/module-list.ts",
     "lib/sandboxed_renderer/init.js",

lib/browser/guest-window-manager.js

@@ -75,8 +75,10 @@ const mergeBrowserWindowOptions = function (embedder, options) {
     }
   }
 
+  if (!webPreferences.nativeWindowOpen) {
     // Sets correct openerId here to give correct options to 'new-window' event handler
     options.webPreferences.openerId = embedder.id
+  }
 
   return options
 }

lib/browser/rpc-server.js

@@ -112,11 +112,15 @@ ipcMainUtils.handleSync('ELECTRON_BROWSER_SANDBOX_LOAD', async function (event)
     contentScripts = getContentScripts()
   }
 
+  const webPreferences = event.sender.getLastWebPreferences() || {}
+
   return {
     contentScripts,
     preloadScripts: await Promise.all(preloadPaths.map(path => getPreloadScript(path))),
     isRemoteModuleEnabled: isRemoteModuleEnabled(event.sender),
     isWebViewTagEnabled: guestViewManager.isWebViewTagEnabled(event.sender),
+    guestInstanceId: webPreferences.guestInstanceId,
+    openerId: webPreferences.openerId,
     process: {
       arch: process.arch,
       platform: process.platform,

lib/renderer/window-setup.ts

@@ -177,7 +177,7 @@ class BrowserWindowProxy {
 export const windowSetup = (
   guestInstanceId: number, openerId: number, isHiddenPage: boolean, usesNativeWindowOpen: boolean
 ) => {
-  if (guestInstanceId == null) {
+  if (!process.sandboxed && guestInstanceId == null) {
     // Override default window.close.
     window.close = function () {
       ipcRendererInternal.send('ELECTRON_BROWSER_WINDOW_CLOSE')
@@ -197,17 +197,18 @@ export const windowSetup = (
         return null
       }
     }
+  }
 
   if (openerId != null) {
     window.opener = getOrCreateProxy(openerId)
   }
-  }
 
   // But we do not support prompt().
   window.prompt = function () {
     throw new Error('prompt() is and will not be supported.')
   }
 
+  if (!usesNativeWindowOpen || openerId != null) {
     ipcRendererInternal.on('ELECTRON_GUEST_WINDOW_POSTMESSAGE', function (
       _event, sourceId: number, message: any, sourceOrigin: string
     ) {
@@ -226,7 +227,9 @@ export const windowSetup = (
 
       window.dispatchEvent(event as MessageEvent)
     })
+  }
 
+  if (!process.sandboxed) {
     window.history.back = function () {
       ipcRendererInternal.send('ELECTRON_NAVIGATION_CONTROLLER_GO_BACK')
     }
@@ -245,6 +248,7 @@ export const windowSetup = (
       },
       set () {}
     })
+  }
 
   if (guestInstanceId != null) {
     // Webview `document.visibilityState` tracks window visibility (and ignores

lib/sandboxed_renderer/init.js

@@ -30,7 +30,13 @@ const { ipcRendererInternal } = require('@electron/internal/renderer/ipc-rendere
 const ipcRendererUtils = require('@electron/internal/renderer/ipc-renderer-internal-utils')
 
 const {
-  contentScripts, preloadScripts, isRemoteModuleEnabled, isWebViewTagEnabled, process: processProps
+  contentScripts,
+  preloadScripts,
+  isRemoteModuleEnabled,
+  isWebViewTagEnabled,
+  guestInstanceId,
+  openerId,
+  process: processProps
 } = ipcRendererUtils.invokeSync('ELECTRON_BROWSER_SANDBOX_LOAD')
 
 process.isRemoteModuleEnabled = isRemoteModuleEnabled
@@ -109,6 +115,11 @@ function preloadRequire (module) {
 const { hasSwitch } = process.electronBinding('command_line')
 
 const contextIsolation = hasSwitch('context-isolation')
+const isHiddenPage = hasSwitch('hidden-page')
+const usesNativeWindowOpen = true
+
+// The arguments to be passed to isolated world.
+const isolatedWorldArgs = { ipcRendererInternal, guestInstanceId, isHiddenPage, openerId, usesNativeWindowOpen }
 
 switch (window.location.protocol) {
   case 'devtools:': {
@@ -127,6 +138,10 @@ switch (window.location.protocol) {
     break
   }
   default: {
+    // Override default web functions.
+    const { windowSetup } = require('@electron/internal/renderer/window-setup')
+    windowSetup(guestInstanceId, openerId, isHiddenPage, usesNativeWindowOpen)
+
     // Inject content scripts.
     if (!process.electronBinding('features').isExtensionsEnabled()) {
       require('@electron/internal/renderer/content-scripts-injector')(contentScripts)
@@ -134,14 +149,17 @@ switch (window.location.protocol) {
   }
 }
 
-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)
 }
 
+// Pass the arguments to isolatedWorld.
+if (contextIsolation) {
+  v8Util.setHiddenValue(global, 'isolated-world-args', isolatedWorldArgs)
+}
+
 // 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:
 //

shell/renderer/atom_sandboxed_renderer_client.cc

@@ -141,12 +141,6 @@ void AtomSandboxedRendererClient::InitializeBindings(
   process.SetReadOnly("sandboxed", true);
   process.SetReadOnly("type", "renderer");
   process.SetReadOnly("isMainFrame", is_main_frame);
-
-  // Pass in CLI flags needed to setup the renderer
-  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-  if (command_line->HasSwitch(switches::kGuestInstanceID))
-    b.Set(options::kGuestInstanceID,
-          command_line->GetSwitchValueASCII(switches::kGuestInstanceID));
 }
 
 void AtomSandboxedRendererClient::RenderFrameCreated(

spec-main/chromium-spec.ts

@@ -766,9 +766,13 @@ describe('chromium features', () => {
 
     describe('when opened from main window', () => {
       for (const { parent, child, nodeIntegration, nativeWindowOpen, openerAccessible } of table) {
-        const description = `when parent=${s(parent)} opens child=${s(child)} with nodeIntegration=${nodeIntegration} nativeWindowOpen=${nativeWindowOpen}, child should ${openerAccessible ? '' : 'not '}be able to access opener`
+        for (const sandboxPopup of [false, true]) {
+          const description = `when parent=${s(parent)} opens child=${s(child)} with nodeIntegration=${nodeIntegration} nativeWindowOpen=${nativeWindowOpen} sandboxPopup=${sandboxPopup}, child should ${openerAccessible ? '' : 'not '}be able to access opener`
           it(description, async () => {
             const w = new BrowserWindow({ show: false, webPreferences: { nodeIntegration: true, nativeWindowOpen } })
+            w.webContents.once('new-window', (e, url, frameName, disposition, options) => {
+              options!.webPreferences!.sandbox = sandboxPopup
+            })
             await w.loadURL(parent)
             const childOpenerLocation = await w.webContents.executeJavaScript(`new Promise(resolve => {
               window.addEventListener('message', function f(e) {
@@ -783,6 +787,7 @@ describe('chromium features', () => {
             }
           })
         }
+      }
     })
 
     describe('when opened from <webview>', () => {