focused element and selected elements as arguments for title commands

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

@@ -168,6 +168,7 @@ export class MainThreadTreeViews extends Disposable implements MainThreadTreeVie
 		this._register(treeView.onDidExpandItem(item => this._proxy.$setExpanded(treeViewId, item.handle, true)));
 		this._register(treeView.onDidCollapseItem(item => this._proxy.$setExpanded(treeViewId, item.handle, false)));
 		this._register(treeView.onDidChangeSelection(items => this._proxy.$setSelection(treeViewId, items.map(({ handle }) => handle))));
+		this._register(treeView.onDidChangeFocus(item => this._proxy.$setFocus(treeViewId, item.handle)));
 		this._register(treeView.onDidChangeVisibility(isVisible => this._proxy.$setVisible(treeViewId, isVisible)));
 	}
 

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

@@ -1404,6 +1404,7 @@ export interface ExtHostTreeViewsShape {
 	$handleDrag(sourceViewId: string, sourceTreeItemHandles: string[], operationUuid: string, token: CancellationToken): Promise<DataTransferDTO | undefined>;
 	$setExpanded(treeViewId: string, treeItemHandle: string, expanded: boolean): void;
 	$setSelection(treeViewId: string, treeItemHandles: string[]): void;
+	$setFocus(treeViewId: string, treeItemHandle: string): void;
 	$setVisible(treeViewId: string, visible: boolean): void;
 	$hasResolve(treeViewId: string): Promise<boolean>;
 	$resolve(treeViewId: string, treeItemHandle: string, token: CancellationToken): Promise<ITreeItem | undefined>;

src/vs/workbench/api/common/extHostTreeViews.ts

@@ -59,7 +59,7 @@ export class ExtHostTreeViews implements ExtHostTreeViewsShape {
 	) {
 
 		function isTreeViewConvertableItem(arg: any): boolean {
-			return arg && arg.$treeViewId && (arg.$treeItemHandle || arg.$selectedTreeItems);
+			return arg && arg.$treeViewId && (arg.$treeItemHandle || arg.$selectedTreeItems || arg.$focusedTreeItem);
 		}
 		commands.registerArgumentProcessor({
 			processArgument: arg => {
@@ -221,6 +221,14 @@ export class ExtHostTreeViews implements ExtHostTreeViewsShape {
 		treeView.setSelection(treeItemHandles);
 	}
 
+	$setFocus(treeViewId: string, treeItemHandles: string) {
+		const treeView = this.treeViews.get(treeViewId);
+		if (!treeView) {
+			throw new Error(localize('treeView.notRegistered', 'No tree view with id \'{0}\' registered.', treeViewId));
+		}
+		treeView.setFocus(treeItemHandles);
+	}
+
 	$setVisible(treeViewId: string, isVisible: boolean): void {
 		const treeView = this.treeViews.get(treeViewId);
 		if (!treeView) {
@@ -240,8 +248,8 @@ export class ExtHostTreeViews implements ExtHostTreeViewsShape {
 		if (treeView && '$treeItemHandle' in arg) {
 			return treeView.getExtensionElement(arg.$treeItemHandle);
 		}
-		if (treeView && '$selectedTreeItems' in arg && arg.$selectedTreeItems) {
-			return { selectedTreeItems: treeView.selectedElements };
+		if (treeView && '$focusedTreeItem' in arg && arg.$focusedTreeItem) {
+			return treeView.focusedElement;
 		}
 		return null;
 	}
@@ -276,6 +284,9 @@ class ExtHostTreeView<T> extends Disposable {
 	private _selectedHandles: TreeItemHandle[] = [];
 	get selectedElements(): T[] { return <T[]>this._selectedHandles.map(handle => this.getExtensionElement(handle)).filter(element => !isUndefinedOrNull(element)); }
 
+	private _focusedHandle: TreeItemHandle | undefined = undefined;
+	get focusedElement(): T | undefined { return <T | undefined>(this._focusedHandle ? this.getExtensionElement(this._focusedHandle) : undefined); }
+
 	private _onDidExpandElement: Emitter<vscode.TreeViewExpansionEvent<T>> = this._register(new Emitter<vscode.TreeViewExpansionEvent<T>>());
 	readonly onDidExpandElement: Event<vscode.TreeViewExpansionEvent<T>> = this._onDidExpandElement.event;
 
@@ -455,6 +466,10 @@ class ExtHostTreeView<T> extends Disposable {
 		}
 	}
 
+	setFocus(treeItemHandle: TreeItemHandle) {
+		this._focusedHandle = treeItemHandle;
+	}
+
 	setVisible(visible: boolean): void {
 		if (visible !== this._visible) {
 			this._visible = visible;

src/vs/workbench/browser/parts/views/treeView.ts

@@ -71,6 +71,7 @@ export class TreeViewPane extends ViewPane {
 
 	protected readonly treeView: ITreeView;
 	private _container: HTMLElement | undefined;
+	private _actionRunner: MultipleSelectionActionRunner;
 
 	constructor(
 		options: IViewletViewOptions,
@@ -83,6 +84,7 @@ export class TreeViewPane extends ViewPane {
 		@IOpenerService openerService: IOpenerService,
 		@IThemeService themeService: IThemeService,
 		@ITelemetryService telemetryService: ITelemetryService,
+		@INotificationService notificationService: INotificationService
 	) {
 		super({ ...(options as IViewPaneOptions), titleMenuId: MenuId.ViewTitle, donotForwardArgs: false }, keybindingService, contextMenuService, configurationService, contextKeyService, viewDescriptorService, instantiationService, openerService, themeService, telemetryService);
 		const { treeView } = (<ITreeViewDescriptor>Registry.as<IViewsRegistry>(Extensions.ViewsRegistry).getView(options.id));
@@ -103,6 +105,7 @@ export class TreeViewPane extends ViewPane {
 		if (options.titleDescription !== this.treeView.description) {
 			this.updateTitleDescription(this.treeView.description);
 		}
+		this._actionRunner = new MultipleSelectionActionRunner(notificationService, () => this.treeView.getSelection());
 
 		this.updateTreeVisibility();
 	}
@@ -143,11 +146,12 @@ export class TreeViewPane extends ViewPane {
 		this.treeView.setVisibility(this.isBodyVisible());
 	}
 
+	override getActionRunner() {
+		return this._actionRunner;
+	}
+
 	override getActionsContext(): TreeViewPaneHandleArg {
-		return {
-			$selectedTreeItems: true,
-			$treeViewId: this.id
-		};
+		return { $treeViewId: this.id, $focusedTreeItem: true, $selectedTreeItems: true };
 	}
 
 }
@@ -214,6 +218,9 @@ abstract class AbstractTreeView extends Disposable implements ITreeView {
 	private _onDidChangeSelection: Emitter<ITreeItem[]> = this._register(new Emitter<ITreeItem[]>());
 	readonly onDidChangeSelection: Event<ITreeItem[]> = this._onDidChangeSelection.event;
 
+	private _onDidChangeFocus: Emitter<ITreeItem> = this._register(new Emitter<ITreeItem>());
+	readonly onDidChangeFocus: Event<ITreeItem> = this._onDidChangeFocus.event;
+
 	private readonly _onDidChangeVisibility: Emitter<boolean> = this._register(new Emitter<boolean>());
 	readonly onDidChangeVisibility: Event<boolean> = this._onDidChangeVisibility.event;
 
@@ -617,6 +624,11 @@ abstract class AbstractTreeView extends Disposable implements ITreeView {
 		customTreeKey.set(true);
 		this._register(this.tree.onContextMenu(e => this.onContextMenu(treeMenus, e, actionRunner)));
 		this._register(this.tree.onDidChangeSelection(e => this._onDidChangeSelection.fire(e.elements)));
+		this._register(this.tree.onDidChangeFocus(e => {
+			if (e.elements.length) {
+				this._onDidChangeFocus.fire(e.elements[0]);
+			}
+		}));
 		this._register(this.tree.onDidChangeCollapseState(e => {
 			if (!e.node.element) {
 				return;
@@ -803,6 +815,10 @@ abstract class AbstractTreeView extends Disposable implements ITreeView {
 		this.tree?.setSelection(items);
 	}
 
+	getSelection(): ITreeItem[] {
+		return this.tree?.getSelection() ?? [];
+	}
+
 	setFocus(item: ITreeItem): void {
 		if (this.tree) {
 			this.focus(true, item);
@@ -1233,13 +1249,13 @@ class MultipleSelectionActionRunner extends ActionRunner {
 		}));
 	}
 
-	override async runAction(action: IAction, context: TreeViewItemHandleArg): Promise<void> {
+	override async runAction(action: IAction, context: TreeViewItemHandleArg | TreeViewPaneHandleArg): Promise<void> {
 		const selection = this.getSelectedResources();
 		let selectionHandleArgs: TreeViewItemHandleArg[] | undefined = undefined;
 		let actionInSelected: boolean = false;
 		if (selection.length > 1) {
 			selectionHandleArgs = selection.map(selected => {
-				if (selected.handle === context.$treeItemHandle) {
+				if ((selected.handle === (context as TreeViewItemHandleArg).$treeItemHandle) || (context as TreeViewPaneHandleArg).$selectedTreeItems) {
 					actionInSelected = true;
 				}
 				return { $treeViewId: context.$treeViewId, $treeItemHandle: selected.handle };

src/vs/workbench/browser/parts/views/viewPane.ts

@@ -11,7 +11,7 @@ import { attachButtonStyler, attachProgressBarStyler } from 'vs/platform/theme/c
 import { PANEL_BACKGROUND, SIDE_BAR_BACKGROUND } from 'vs/workbench/common/theme';
 import { after, append, $, trackFocus, EventType, addDisposableListener, createCSSRule, asCSSUrl } from 'vs/base/browser/dom';
 import { IDisposable, Disposable, DisposableStore } from 'vs/base/common/lifecycle';
-import { IAction } from 'vs/base/common/actions';
+import { IAction, IActionRunner } from 'vs/base/common/actions';
 import { ActionsOrientation, IActionViewItem, prepareActions } from 'vs/base/browser/ui/actionbar/actionbar';
 import { Registry } from 'vs/platform/registry/common/platform';
 import { ToolBar } from 'vs/base/browser/ui/toolbar/toolbar';
@@ -298,7 +298,8 @@ export abstract class ViewPane extends Pane implements IView {
 			actionViewItemProvider: action => this.getActionViewItem(action),
 			ariaLabel: nls.localize('viewToolbarAriaLabel', "{0} actions", this.title),
 			getKeyBinding: action => this.keybindingService.lookupKeybinding(action.id),
-			renderDropdownAsChildElement: true
+			renderDropdownAsChildElement: true,
+			actionRunner: this.getActionRunner()
 		});
 
 		this._register(this.toolbar);
@@ -519,6 +520,10 @@ export abstract class ViewPane extends Pane implements IView {
 		return undefined;
 	}
 
+	getActionRunner(): IActionRunner | undefined {
+		return undefined;
+	}
+
 	getOptimalWidth(): number {
 		return 0;
 	}

src/vs/workbench/common/views.ts

@@ -663,6 +663,8 @@ export interface ITreeView extends IDisposable {
 
 	readonly onDidChangeSelection: Event<ITreeItem[]>;
 
+	readonly onDidChangeFocus: Event<ITreeItem>;
+
 	readonly onDidChangeVisibility: Event<boolean>;
 
 	readonly onDidChangeActions: Event<void>;
@@ -691,6 +693,8 @@ export interface ITreeView extends IDisposable {
 
 	setSelection(items: ITreeItem[]): void;
 
+	getSelection(): ITreeItem[];
+
 	setFocus(item: ITreeItem): void;
 
 	show(container: any): void;
@@ -712,7 +716,8 @@ export interface ITreeViewDescriptor extends IViewDescriptor {
 
 export type TreeViewPaneHandleArg = {
 	$treeViewId: string;
-	$selectedTreeItems: boolean;
+	$selectedTreeItems?: boolean;
+	$focusedTreeItem?: boolean;
 };
 
 export type TreeViewItemHandleArg = {

src/vs/workbench/contrib/userDataSync/browser/userDataSyncMergesView.ts

@@ -36,7 +36,7 @@ import { IEditorContribution } from 'vs/editor/common/editorCommon';
 import { ICodeEditor } from 'vs/editor/browser/editorBrowser';
 import { FloatingClickWidget } from 'vs/workbench/browser/codeeditor';
 import { registerEditorContribution } from 'vs/editor/browser/editorExtensions';
-import { Severity } from 'vs/platform/notification/common/notification';
+import { INotificationService, Severity } from 'vs/platform/notification/common/notification';
 import { IDialogService } from 'vs/platform/dialogs/common/dialogs';
 import { EditorResolution } from 'vs/platform/editor/common/editor';
 
@@ -66,8 +66,9 @@ export class UserDataSyncMergesViewPane extends TreeViewPane {
 		@IOpenerService openerService: IOpenerService,
 		@IThemeService themeService: IThemeService,
 		@ITelemetryService telemetryService: ITelemetryService,
+		@INotificationService notificationService: INotificationService
 	) {
-		super(options, keybindingService, contextMenuService, configurationService, contextKeyService, viewDescriptorService, instantiationService, openerService, themeService, telemetryService);
+		super(options, keybindingService, contextMenuService, configurationService, contextKeyService, viewDescriptorService, instantiationService, openerService, themeService, telemetryService, notificationService);
 		this.userDataSyncPreview = userDataSyncWorkbenchService.userDataSyncPreview;
 
 		this._register(this.userDataSyncPreview.onDidChangeResources(() => this.updateSyncButtonEnablement()));