ensure (newly) selected item from references tree is visible in the editor (#168574)

fixes https://github.com/microsoft/vscode/issues/167296#event-7989480633

extensions/references-view/src/navigation.ts

@@ -18,6 +18,7 @@ export class Navigation {
 		this._disposables.push(
 			vscode.commands.registerCommand('references-view.next', () => this.next(false)),
 			vscode.commands.registerCommand('references-view.prev', () => this.previous(false)),
+			_view.onDidChangeSelection(() => this._ensureSelectedElementIsVisible()),
 		);
 	}
 
@@ -30,6 +31,20 @@ export class Navigation {
 		this._ctxCanNavigate.set(Boolean(this._delegate));
 	}
 
+	private _ensureSelectedElementIsVisible(): void {
+		if (this._view.selection.length === 0) {
+			return;
+		}
+		const [item] = this._view.selection;
+		const location = this._delegate?.location(item);
+		if (!location) {
+			return;
+		}
+		if (vscode.window.activeTextEditor?.document.uri.toString() !== location.uri.toString()) {
+			this._open(location, true);
+		}
+	}
+
 	private _anchor(): undefined | unknown {
 		if (!this._delegate) {
 			return undefined;

extensions/references-view/src/references/model.ts

@@ -126,7 +126,9 @@ export class ReferencesModel implements SymbolItemNavigation<FileItem | Referenc
 	}
 
 	location(item: FileItem | ReferenceItem) {
-		return item instanceof ReferenceItem ? item.location : undefined;
+		return item instanceof ReferenceItem
+			? item.location
+			: new vscode.Location(item.uri, item.references[0]?.location.range ?? new vscode.Position(0, 0));
 	}
 
 	nearest(uri: vscode.Uri, position: vscode.Position): FileItem | ReferenceItem | undefined {