notifications - toggle expansion on double click

src/vs/workbench/browser/parts/notifications/notificationCommands.ts

@@ -148,11 +148,7 @@ export function registerNotificationCommands(center: INotificationsCenterControl
 		handler: accessor => {
 			const notification = center.selected;
 			if (notification) {
-				if (notification.expanded) {
-					notification.collapse();
-				} else {
-					notification.expand();
-				}
+				notification.toggle();
 			}
 		}
 	});

src/vs/workbench/browser/parts/notifications/notificationsCenter.ts

@@ -135,6 +135,11 @@ export class NotificationsCenter extends Themable {
 		);
 		this.toUnbind.push(this.list);
 
+		this.toUnbind.push(this.list.onMouseDblClick(event => {
+			const item = event.element;
+			item.toggle();
+		}));
+
 		// Context key
 		NotificationsCenterFocusedContext.bindTo(this.list.contextKeyService);
 

src/vs/workbench/common/notifications.ts

@@ -152,6 +152,7 @@ export interface INotificationViewItem {
 
 	expand(): void;
 	collapse(): void;
+	toggle(): void;
 
 	dispose(): void;
 
@@ -276,6 +277,14 @@ export class NotificationViewItem implements INotificationViewItem {
 		this._onDidChange.fire();
 	}
 
+	public toggle(): void {
+		if (this._expanded) {
+			this.collapse();
+		} else {
+			this.expand();
+		}
+	}
+
 	public dispose(): void {
 		this._onDidDispose.fire();