Show first (may be non-"All Chats") folder by default.

Telegram/SourceFiles/data/data_chat_filters.cpp

@@ -534,6 +534,28 @@ const std::vector<ChatFilter> &ChatFilters::list() const {
 	return _list;
 }
 
+FilterId ChatFilters::defaultId() const {
+	return lookupId(0);
+}
+
+FilterId ChatFilters::lookupId(int index) const {
+	Expects(index >= 0 && index < _list.size());
+
+	if (_owner->session().user()->isPremium() || !_list.front().id()) {
+		return _list[index].id();
+	}
+	const auto i = ranges::find(_list, FilterId(0), &ChatFilter::id);
+	return !index
+		? FilterId()
+		: (index <= int(i - begin(_list)))
+		? _list[index - 1].id()
+		: _list[index].id();
+}
+
+bool ChatFilters::loaded() const {
+	return _loaded;
+}
+
 bool ChatFilters::has() const {
 	return _list.size() > 1;
 }

Telegram/SourceFiles/data/data_chat_filters.h

@@ -102,8 +102,12 @@ public:
 	void moveAllToFront();
 	[[nodiscard]] const std::vector<ChatFilter> &list() const;
 	[[nodiscard]] rpl::producer<> changed() const;
+	[[nodiscard]] bool loaded() const;
 	[[nodiscard]] bool has() const;
 
+	[[nodiscard]] FilterId defaultId() const;
+	[[nodiscard]] FilterId lookupId(int index) const;
+
 	bool loadNextExceptions(bool chatsListLoaded);
 
 	void refreshHistory(not_null<History*> history);

Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp

@@ -3205,20 +3205,19 @@ void InnerWidget::setupShortcuts() {
 		});
 
 		if (session().data().chatsFilters().has()) {
-			const auto filters = &session().data().chatsFilters().list();
-			const auto filtersCount = int(filters->size());
+			const auto filters = &session().data().chatsFilters();
+			const auto filtersCount = int(filters->list().size());
 			auto &&folders = ranges::views::zip(
 				Shortcuts::kShowFolder,
 				ranges::views::ints(0, ranges::unreachable));
 			for (const auto [command, index] : folders) {
 				const auto select = (command == Command::ShowFolderLast)
-					? filtersCount
-					: std::clamp(index, 0, int(filtersCount));
+					? (filtersCount - 1)
+					: std::clamp(index, 0, filtersCount - 1);
 				request->check(command) && request->handle([=] {
 					if (select <= filtersCount) {
-						_controller->setActiveChatsFilter((select > 0)
-							? (*filters)[select - 1].id()
-							: 0);
+						_controller->setActiveChatsFilter(
+							filters->lookupId(select));
 					}
 					return true;
 				});

Telegram/SourceFiles/window/window_filters_menu.cpp

@@ -121,8 +121,12 @@ void FiltersMenu::setup() {
 	_activeFilterId = _session->activeChatsFilterCurrent();
 	_session->activeChatsFilter(
 	) | rpl::filter([=](FilterId id) {
-		return id != _activeFilterId;
+		return (id != _activeFilterId);
 	}) | rpl::start_with_next([=](FilterId id) {
+		if (!_list) {
+			_activeFilterId = id;
+			return;
+		}
 		const auto i = _filters.find(_activeFilterId);
 		if (i != end(_filters)) {
 			i->second->setActive(false);

Telegram/SourceFiles/window/window_session_controller.cpp

@@ -600,6 +600,7 @@ SessionController::SessionController(
 		_window->widget(),
 		this))
 , _invitePeekTimer([=] { checkInvitePeek(); })
+, _activeChatsFilter(session->data().chatsFilters().defaultId())
 , _defaultChatTheme(std::make_shared<Ui::ChatTheme>())
 , _chatStyle(std::make_unique<Ui::ChatStyle>())
 , _cachedReactionIconFactory(std::make_unique<ReactionIconFactory>()) {
@@ -657,6 +658,10 @@ SessionController::SessionController(
 	}, _lifetime);
 
 	session->addWindow(this);
+
+	crl::on_main(this, [=] {
+		activateFirstChatsFilter();
+	});
 }
 
 void SessionController::suggestArchiveAndMute() {
@@ -772,6 +777,7 @@ rpl::producer<> SessionController::filtersMenuChanged() const {
 }
 
 void SessionController::checkOpenedFilter() {
+	activateFirstChatsFilter();
 	if (const auto filterId = activeChatsFilterCurrent()) {
 		const auto &list = session().data().chatsFilters().list();
 		const auto i = ranges::find(list, filterId, &Data::ChatFilter::id);
@@ -781,6 +787,14 @@ void SessionController::checkOpenedFilter() {
 	}
 }
 
+void SessionController::activateFirstChatsFilter() {
+	if (_filtersActivated || !session().data().chatsFilters().loaded()) {
+		return;
+	}
+	_filtersActivated = true;
+	setActiveChatsFilter(session().data().chatsFilters().defaultId());
+}
+
 bool SessionController::uniqueChatsInSearchResults() const {
 	return session().supportMode()
 		&& !session().settings().supportAllSearchResults()

Telegram/SourceFiles/window/window_session_controller.h

@@ -513,6 +513,7 @@ private:
 	void refreshFiltersMenu();
 	void checkOpenedFilter();
 	void suggestArchiveAndMute();
+	void activateFirstChatsFilter();
 
 	int minimalThreeColumnWidth() const;
 	int countDialogsWidthFromRatio(int bodyWidth) const;
@@ -562,6 +563,7 @@ private:
 	base::Variable<bool> _dialogsListDisplayForced = { false };
 	std::deque<Dialogs::RowDescriptor> _chatEntryHistory;
 	int _chatEntryHistoryPosition = -1;
+	bool _filtersActivated = false;
 	bool _selectingPeer = false;
 
 	base::Timer _invitePeekTimer;