tree.select should watch for expandOnlyOnTwistieClick

src/vs/base/browser/ui/tree/asyncDataTree.ts

@@ -326,6 +326,14 @@ export class AsyncDataTree<TInput, T, TFilterData = void> implements IDisposable
 
 	get filterOnType(): boolean { return this.tree.filterOnType; }
 	get openOnSingleClick(): boolean { return this.tree.openOnSingleClick; }
+	get expandOnlyOnTwistieClick(): boolean | ((e: T) => boolean) {
+		if (typeof this.tree.expandOnlyOnTwistieClick === 'boolean') {
+			return this.tree.expandOnlyOnTwistieClick;
+		}
+
+		const fn = this.tree.expandOnlyOnTwistieClick;
+		return element => fn(this.nodes.get((element === this.root.element ? null : element) as T) || null);
+	}
 
 	get onDidDispose(): Event<void> { return this.tree.onDidDispose; }
 

src/vs/workbench/browser/actions/listCommands.ts

@@ -603,7 +603,17 @@ KeybindingsRegistry.registerCommandAndKeybindingRule({
 			const focus = list.getFocus();
 
 			if (focus.length > 0) {
-				list.toggleCollapsed(focus[0]);
+				let toggleCollapsed = true;
+
+				if (list.expandOnlyOnTwistieClick === true) {
+					toggleCollapsed = false;
+				} else if (typeof list.expandOnlyOnTwistieClick !== 'boolean' && list.expandOnlyOnTwistieClick(focus[0])) {
+					toggleCollapsed = false;
+				}
+
+				if (toggleCollapsed) {
+					list.toggleCollapsed(focus[0]);
+				}
 			}
 
 			list.setSelection(focus, fakeKeyboardEvent);