Add "open mode picker" action (microsoft#253965)

* Add "open mode picker" action

* poke ci

---------

Co-authored-by: Josh Spicer <[email protected]>

Author: roblourens

src/vs/workbench/contrib/chat/browser/actions/chatExecuteActions.ts

@@ -377,6 +377,28 @@ class OpenModelPickerAction extends Action2 {
 	}
 }
 
+class OpenModePickerAction extends Action2 {
+	static readonly ID = 'workbench.action.chat.openModePicker';
+
+	constructor() {
+		super({
+			id: OpenModePickerAction.ID,
+			title: localize2('interactive.openModePicker.label', "Open Mode Picker"),
+			category: CHAT_CATEGORY,
+			f1: false,
+			precondition: ChatContextKeys.enabled,
+		});
+	}
+
+	override async run(accessor: ServicesAccessor, ...args: any[]): Promise<void> {
+		const widgetService = accessor.get(IChatWidgetService);
+		const widget = widgetService.lastFocusedWidget;
+		if (widget) {
+			widget.input.openModePicker();
+		}
+	}
+}
+
 export const ChangeChatModelActionId = 'workbench.action.chat.changeModel';
 class ChangeChatModelAction extends Action2 {
 	static readonly ID = ChangeChatModelActionId;
@@ -868,6 +890,7 @@ export function registerChatExecuteActions() {
 	registerAction2(ToggleRequestPausedAction);
 	registerAction2(SwitchToNextModelAction);
 	registerAction2(OpenModelPickerAction);
+	registerAction2(OpenModePickerAction);
 	registerAction2(ChangeChatModelAction);
 	registerAction2(CancelEdit);
 }

src/vs/workbench/contrib/chat/browser/chatInputPart.ts

@@ -271,6 +271,7 @@ export class ChatInputPart extends Disposable implements IHistoryNavigationWidge
 	private chatModeKindKey: IContextKey<ChatModeKind>;
 
 	private modelWidget: ModelPickerActionItem | undefined;
+	private modeWidget: ModePickerActionItem | undefined;
 	private readonly _waitForPersistedLanguageModel: MutableDisposable<IDisposable>;
 	private _onDidChangeCurrentLanguageModel: Emitter<ILanguageModelChatMetadataAndIdentifier>;
 
@@ -540,6 +541,10 @@ export class ChatInputPart extends Disposable implements IHistoryNavigationWidge
 		this.modelWidget?.show();
 	}
 
+	public openModePicker(): void {
+		this.modeWidget?.show();
+	}
+
 	private checkModelSupported(): void {
 		if (this._currentLanguageModel && !this.modelSupportedForDefaultAgent(this._currentLanguageModel)) {
 			this.setCurrentLanguageModelToDefault();
@@ -1149,7 +1154,7 @@ export class ChatInputPart extends Disposable implements IHistoryNavigationWidge
 					const delegate: IModePickerDelegate = {
 						currentMode: this._currentModeObservable
 					};
-					return this.instantiationService.createInstance(ModePickerActionItem, action, delegate);
+					return this.modeWidget = this.instantiationService.createInstance(ModePickerActionItem, action, delegate);
 				}
 
 				return undefined;