Add `IWorkbenchConstructionOptions._wrapWebWorkerExtHostInIframe`

resources/serverless/code-web.js

@@ -28,7 +28,8 @@ const args = minimist(process.argv, {
 	boolean: [
 		'no-launch',
 		'help',
-		'verbose'
+		'verbose',
+		'wrap-iframe'
 	],
 	string: [
 		'scheme',
@@ -43,6 +44,7 @@ if (args.help) {
 	console.log(
 		'yarn web [options]\n' +
 		' --no-launch      Do not open VSCode web in the browser\n' +
+		' --wrap-iframe    Wrap the Web Worker Extension Host in an iframe\n' +
 		' --scheme         Protocol (https or http)\n' +
 		' --host           Remote host\n' +
 		' --port           Remote/Local port\n' +
@@ -293,13 +295,16 @@ async function handleRoot(req, res) {
 		fancyLog(`${ansiColors.magenta('Additional extensions')}: ${staticExtensions.map(e => path.basename(e.extensionLocation.path)).join(', ') || 'None'}`);
 	}
 
-	const webConfigJSON = escapeAttribute(JSON.stringify({
+	const webConfigJSON = {
 		folderUri: folderUri,
-		staticExtensions
-	}));
+		staticExtensions,
+	};
+	if (args['wrap-iframe']) {
+		webConfigJSON._wrapWebWorkerExtHostInIframe = true;
+	}
 
 	const data = (await readFile(WEB_MAIN)).toString()
-		.replace('{{WORKBENCH_WEB_CONFIGURATION}}', () => webConfigJSON) // use a replace function to avoid that regexp replace patterns ($&, $0, ...) are applied
+		.replace('{{WORKBENCH_WEB_CONFIGURATION}}', () => escapeAttribute(JSON.stringify(webConfigJSON))) // use a replace function to avoid that regexp replace patterns ($&, $0, ...) are applied
 		.replace('{{WORKBENCH_BUILTIN_EXTENSIONS}}', () => escapeAttribute(JSON.stringify(builtInExtensions)))
 		.replace('{{WEBVIEW_ENDPOINT}}', '')
 		.replace('{{REMOTE_USER_DATA_URI}}', '');

src/vs/workbench/services/extensions/browser/webWorkerExtensionHost.ts

@@ -29,8 +29,6 @@ import { generateUuid } from 'vs/base/common/uuid';
 import { canceled, onUnexpectedError } from 'vs/base/common/errors';
 import { WEB_WORKER_IFRAME } from 'vs/workbench/services/extensions/common/webWorkerIframe';
 
-const WRAP_IN_IFRAME = true;
-
 export interface IWebWorkerExtensionHostInitData {
 	readonly autoStart: boolean;
 	readonly extensions: IExtensionDescription[];
@@ -74,7 +72,7 @@ export class WebWorkerExtensionHost extends Disposable implements IExtensionHost
 
 	public async start(): Promise<IMessagePassingProtocol> {
 		if (!this._protocolPromise) {
-			if (WRAP_IN_IFRAME && platform.isWeb) {
+			if (platform.isWeb && this._environmentService.options && this._environmentService.options._wrapWebWorkerExtHostInIframe) {
 				this._protocolPromise = this._startInsideIframe();
 			} else {
 				this._protocolPromise = this._startOutsideIframe();

src/vs/workbench/workbench.web.api.ts

@@ -275,11 +275,18 @@ interface IWorkbenchConstructionOptions {
 
 	/**
 	 * [TEMPORARY]: This will be removed soon.
-	 * Disable the inlined extensions.
+	 * Enable inlined extensions.
 	 * Defaults to false on serverful and true on serverless.
 	 */
 	readonly _enableBuiltinExtensions?: boolean;
 
+	/**
+	 * [TEMPORARY]: This will be removed soon.
+	 * Enable `<iframe>` wrapping.
+	 * Defaults to false.
+	 */
+	readonly _wrapWebWorkerExtHostInIframe?: boolean;
+
 	/**
 	 * Support for URL callbacks.
 	 */