VSCode merge (#4610)

* Merge from vscode e388c734f30757875976c7e326d6cfeee77710de

* fix yarn lcoks

* remove small issue

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

@@ -0,0 +1,49 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { IStatusbarService, StatusbarAlignment as MainThreadStatusBarAlignment } from 'vs/platform/statusbar/common/statusbar';
+import { IDisposable } from 'vs/base/common/lifecycle';
+import { MainThreadStatusBarShape, MainContext, IExtHostContext } from '../common/extHost.protocol';
+import { ThemeColor } from 'vs/platform/theme/common/themeService';
+import { extHostNamedCustomer } from 'vs/workbench/api/common/extHostCustomers';
+import { ExtensionIdentifier } from 'vs/platform/extensions/common/extensions';
+
+@extHostNamedCustomer(MainContext.MainThreadStatusBar)
+export class MainThreadStatusBar implements MainThreadStatusBarShape {
+
+	private readonly _entries: { [id: number]: IDisposable };
+
+	constructor(
+		extHostContext: IExtHostContext,
+		@IStatusbarService private readonly _statusbarService: IStatusbarService
+	) {
+		this._entries = Object.create(null);
+	}
+
+	dispose(): void {
+		for (const key in this._entries) {
+			this._entries[key].dispose();
+		}
+	}
+
+	$setEntry(id: number, extensionId: ExtensionIdentifier, text: string, tooltip: string, command: string, color: string | ThemeColor, alignment: MainThreadStatusBarAlignment, priority: number): void {
+
+		// Dispose any old
+		this.$dispose(id);
+
+		// Add new
+		const entry = this._statusbarService.addEntry({ text, tooltip, command, color, extensionId }, alignment, priority);
+		this._entries[id] = entry;
+	}
+
+	$dispose(id: number) {
+		const disposeable = this._entries[id];
+		if (disposeable) {
+			disposeable.dispose();
+		}
+
+		delete this._entries[id];
+	}
+}