VSCode merge (#4610)

* Merge from vscode e388c734f30757875976c7e326d6cfeee77710de

* fix yarn lcoks

* remove small issue

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

@@ -0,0 +1,41 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { Event } from 'vs/base/common/event';
+import { dispose, IDisposable } from 'vs/base/common/lifecycle';
+import { URI, UriComponents } from 'vs/base/common/uri';
+import { IWindowService, IWindowsService } from 'vs/platform/windows/common/windows';
+import { extHostNamedCustomer } from 'vs/workbench/api/common/extHostCustomers';
+import { ExtHostContext, ExtHostWindowShape, IExtHostContext, MainContext, MainThreadWindowShape } from '../common/extHost.protocol';
+
+@extHostNamedCustomer(MainContext.MainThreadWindow)
+export class MainThreadWindow implements MainThreadWindowShape {
+
+	private readonly proxy: ExtHostWindowShape;
+	private disposables: IDisposable[] = [];
+
+	constructor(
+		extHostContext: IExtHostContext,
+		@IWindowService private readonly windowService: IWindowService,
+		@IWindowsService private readonly windowsService: IWindowsService
+	) {
+		this.proxy = extHostContext.getProxy(ExtHostContext.ExtHostWindow);
+
+		Event.latch(windowService.onDidChangeFocus)
+			(this.proxy.$onDidChangeWindowFocus, this.proxy, this.disposables);
+	}
+
+	dispose(): void {
+		this.disposables = dispose(this.disposables);
+	}
+
+	$getWindowVisibility(): Promise<boolean> {
+		return this.windowService.isFocused();
+	}
+
+	$openUri(uri: UriComponents): Promise<boolean> {
+		return this.windowsService.openExternal(URI.revive(uri).toString(true));
+	}
+}