add editor command, fyi @dbaeumer

src/vs/workbench/api/browser/extensionHost.contribution.ts

@@ -30,6 +30,7 @@ import './mainThreadDocuments';
 import './mainThreadDocumentsAndEditors';
 import './mainThreadEditor';
 import './mainThreadEditors';
+import './mainThreadEditorTabs';
 import './mainThreadErrors';
 import './mainThreadExtensionService';
 import './mainThreadFileSystem';

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

+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { IDisposable } from 'vs/base/common/lifecycle';
+import { URI } from 'vs/base/common/uri';
+import { CommandsRegistry } from 'vs/platform/commands/common/commands';
+import { IExtHostContext, MainContext } from 'vs/workbench/api/common/extHost.protocol';
+import { extHostNamedCustomer } from 'vs/workbench/api/common/extHostCustomers';
+import { Verbosity } from 'vs/workbench/common/editor';
+import { IEditorGroupsService } from 'vs/workbench/services/editor/common/editorGroupsService';
+
+export interface ITabInfo {
+	name: string;
+	resource: URI;
+}
+
+@extHostNamedCustomer(MainContext.MainThreadEditorTabs)
+export class MainThreadEditorTabs {
+
+	private readonly _registration: IDisposable;
+
+	constructor(
+		_extHostContext: IExtHostContext,
+		@IEditorGroupsService private readonly _editorGroupsService: IEditorGroupsService,
+	) {
+		this._registration = CommandsRegistry.registerCommand('_textEditorTabs', () => {
+			return this._fetchTextEditors();
+		});
+	}
+
+	dispose(): void {
+		this._registration.dispose();
+	}
+
+	private _fetchTextEditors(): ITabInfo[] {
+		const result: ITabInfo[] = [];
+		for (const group of this._editorGroupsService.groups) {
+			for (const editor of group.editors) {
+				if (editor.isDisposed() || !editor.resource) {
+					continue;
+				}
+				result.push({
+					name: editor.getTitle(Verbosity.SHORT) ?? '',
+					resource: editor.resource
+				});
+			}
+		}
+		return result;
+	}
+}

src/vs/workbench/api/common/extHost.protocol.ts

@@ -604,6 +604,10 @@ export interface MainThreadEditorInsetsShape extends IDisposable {
 	$postMessage(handle: number, value: any): Promise<boolean>;
 }
 
+export interface MainThreadEditorTabsShape extends IDisposable {
+
+}
+
 export interface ExtHostEditorInsetsShape {
 	$onDidDispose(handle: number): void;
 	$onDidReceiveMessage(handle: number, message: any): void;
@@ -1839,6 +1843,7 @@ export const MainContext = {
 	MainThreadDocumentContentProviders: createMainId<MainThreadDocumentContentProvidersShape>('MainThreadDocumentContentProviders'),
 	MainThreadTextEditors: createMainId<MainThreadTextEditorsShape>('MainThreadTextEditors'),
 	MainThreadEditorInsets: createMainId<MainThreadEditorInsetsShape>('MainThreadEditorInsets'),
+	MainThreadEditorTabs: createMainId<MainThreadEditorTabsShape>('MainThreadEditorTabs'),
 	MainThreadErrors: createMainId<MainThreadErrorsShape>('MainThreadErrors'),
 	MainThreadTreeViews: createMainId<MainThreadTreeViewsShape>('MainThreadTreeViews'),
 	MainThreadDownloadService: createMainId<MainThreadDownloadServiceShape>('MainThreadDownloadService'),