initial cut of vscode.l10n (#158328)

src/vs/workbench/api/browser/mainThreadLocalization.ts

@@ -0,0 +1,26 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { MainContext, MainThreadLocalizationShape } from 'vs/workbench/api/common/extHost.protocol';
+import { extHostNamedCustomer, IExtHostContext } from 'vs/workbench/services/extensions/common/extHostCustomers';
+import { URI, UriComponents } from 'vs/base/common/uri';
+import { IFileService } from 'vs/platform/files/common/files';
+import { Disposable } from 'vs/base/common/lifecycle';
+
+@extHostNamedCustomer(MainContext.MainThreadLocalization)
+export class MainThreadLocalization extends Disposable implements MainThreadLocalizationShape {
+
+	constructor(
+		extHostContext: IExtHostContext,
+		@IFileService private readonly fileService: IFileService,
+	) {
+		super();
+	}
+
+	async $fetchBundleContents(uriComponents: UriComponents): Promise<string> {
+		const contents = await this.fileService.readFile(URI.revive(uriComponents));
+		return contents.value.toString();
+	}
+}