feat: service worker preload scripts for improved extensions support (#44411)

* feat: preload scripts for service workers

* feat: service worker IPC

* test: service worker preload scripts and ipc

lib/preload_realm/.eslintrc.json

@@ -0,0 +1,18 @@
+{
+  "rules": {
+    "no-restricted-imports": [
+      "error",
+      {
+        "paths": [
+          "electron",
+          "electron/main"
+        ],
+        "patterns": [
+          "./*",
+          "../*",
+          "@electron/internal/browser/*"
+        ]
+      }
+    ]
+  }
+}

lib/preload_realm/api/exports/electron.ts

@@ -0,0 +1,6 @@
+import { defineProperties } from '@electron/internal/common/define-properties';
+import { moduleList } from '@electron/internal/preload_realm/api/module-list';
+
+module.exports = {};
+
+defineProperties(module.exports, moduleList);

lib/preload_realm/api/module-list.ts

@@ -0,0 +1,14 @@
+export const moduleList: ElectronInternal.ModuleEntry[] = [
+  {
+    name: 'contextBridge',
+    loader: () => require('@electron/internal/renderer/api/context-bridge')
+  },
+  {
+    name: 'ipcRenderer',
+    loader: () => require('@electron/internal/renderer/api/ipc-renderer')
+  },
+  {
+    name: 'nativeImage',
+    loader: () => require('@electron/internal/common/api/native-image')
+  }
+];

lib/preload_realm/init.ts

@@ -0,0 +1,58 @@
+import '@electron/internal/sandboxed_renderer/pre-init';
+import { IPC_MESSAGES } from '@electron/internal/common/ipc-messages';
+import type * as ipcRendererUtilsModule from '@electron/internal/renderer/ipc-renderer-internal-utils';
+import { createPreloadProcessObject, executeSandboxedPreloadScripts } from '@electron/internal/sandboxed_renderer/preload';
+
+import * as events from 'events';
+
+declare const binding: {
+  get: (name: string) => any;
+  process: NodeJS.Process;
+  createPreloadScript: (src: string) => Function
+};
+
+const ipcRendererUtils = require('@electron/internal/renderer/ipc-renderer-internal-utils') as typeof ipcRendererUtilsModule;
+
+const {
+  preloadScripts,
+  process: processProps
+} = ipcRendererUtils.invokeSync<{
+  preloadScripts: ElectronInternal.PreloadScript[];
+  process: NodeJS.Process;
+}>(IPC_MESSAGES.BROWSER_SANDBOX_LOAD);
+
+const electron = require('electron');
+
+const loadedModules = new Map<string, any>([
+  ['electron', electron],
+  ['electron/common', electron],
+  ['events', events],
+  ['node:events', events]
+]);
+
+const loadableModules = new Map<string, Function>([
+  ['url', () => require('url')],
+  ['node:url', () => require('url')]
+]);
+
+const preloadProcess = createPreloadProcessObject();
+
+Object.assign(preloadProcess, binding.process);
+Object.assign(preloadProcess, processProps);
+
+Object.assign(process, processProps);
+
+require('@electron/internal/renderer/ipc-native-setup');
+
+executeSandboxedPreloadScripts({
+  loadedModules,
+  loadableModules,
+  process: preloadProcess,
+  createPreloadScript: binding.createPreloadScript,
+  exposeGlobals: {
+    Buffer,
+    // FIXME(samuelmaddock): workaround webpack bug replacing this with just
+    // `__webpack_require__.g,` which causes script error
+    global: globalThis
+  }
+}, preloadScripts);