Provide section title from the section class.

Telegram/SourceFiles/info/common_groups/info_common_groups_widget.cpp

@@ -12,6 +12,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/search_field_controller.h"
 #include "ui/widgets/scroll_area.h"
 #include "ui/ui_utility.h"
+#include "lang/lang_keys.h"
 #include "data/data_user.h"
 #include "data/data_session.h"
 #include "main/main_session.h"
@@ -62,6 +63,10 @@ Widget::Widget(
 		user));
 }
 
+rpl::producer<QString> Widget::title() {
+	return tr::lng_profile_common_groups_section();
+}
+
 not_null<UserData*> Widget::user() const {
 	return _inner->user();
 }

Telegram/SourceFiles/info/common_groups/info_common_groups_widget.h

@@ -60,6 +60,8 @@ public:
 		const QRect &geometry,
 		not_null<Memento*> memento);
 
+	rpl::producer<QString> title() override;
+
 private:
 	void saveState(not_null<Memento*> memento);
 	void restoreState(not_null<Memento*> memento);

Telegram/SourceFiles/info/downloads/info_downloads_widget.cpp

@@ -101,6 +101,10 @@ void Widget::selectionAction(SelectionAction action) {
 	_inner->selectionAction(action);
 }
 
+rpl::producer<QString> Widget::title() {
+	return tr::lng_downloads_section();
+}
+
 std::shared_ptr<Info::Memento> Make(not_null<UserData*> self) {
 	return std::make_shared<Info::Memento>(
 		std::vector<std::shared_ptr<ContentMemento>>(

Telegram/SourceFiles/info/downloads/info_downloads_widget.h

@@ -57,6 +57,8 @@ public:
 	rpl::producer<SelectedItems> selectedListValue() const override;
 	void selectionAction(SelectionAction action) override;
 
+	rpl::producer<QString> title() override;
+
 private:
 	void saveState(not_null<Memento*> memento);
 	void restoreState(not_null<Memento*> memento);

Telegram/SourceFiles/info/info_content_widget.cpp

@@ -100,6 +100,14 @@ std::shared_ptr<ContentMemento> ContentWidget::createMemento() {
 	return result;
 }
 
+void ContentWidget::setIsStackBottom(bool isStackBottom) {
+	_isStackBottom = isStackBottom;
+}
+
+bool ContentWidget::isStackBottom() const {
+	return _isStackBottom;
+}
+
 void ContentWidget::paintEvent(QPaintEvent *e) {
 	Painter p(this);
 	p.fillRect(e->rect(), _bg);

Telegram/SourceFiles/info/info_content_widget.h

@@ -45,8 +45,8 @@ public:
 		not_null<ContentMemento*> memento) = 0;
 	std::shared_ptr<ContentMemento> createMemento();
 
-	virtual void setIsStackBottom(bool isStackBottom) {
-	}
+	virtual void setIsStackBottom(bool isStackBottom);
+	[[nodiscard]] bool isStackBottom() const;
 
 	rpl::producer<int> scrollHeightValue() const;
 	rpl::producer<int> desiredHeightValue() const override;
@@ -73,6 +73,8 @@ public:
 	virtual void selectionAction(SelectionAction action) {
 	}
 
+	[[nodiscard]] virtual rpl::producer<QString> title() = 0;
+
 	virtual void saveChanges(FnMut<void()> done);
 
 protected:
@@ -111,6 +113,7 @@ private:
 	base::unique_qptr<Ui::RpWidget> _searchWrap = nullptr;
 	QPointer<Ui::InputField> _searchField;
 	int _innerDesiredHeight = 0;
+	bool _isStackBottom = false;
 
 	// Saving here topDelta in setGeometryWithTopMoved() to get it passed to resizeEvent().
 	int _topDelta = 0;

Telegram/SourceFiles/info/info_top_bar.cpp

@@ -560,75 +560,4 @@ void TopBar::performDelete() {
 	_selectionActionRequests.fire(SelectionAction::Delete);
 }
 
-rpl::producer<QString> TitleValue(
-		const Section &section,
-		Key key,
-		bool isStackBottom) {
-	const auto peer = key.peer();
-
-	switch (section.type()) {
-	case Section::Type::Profile:
-		if (const auto user = peer->asUser()) {
-			return (user->isBot() && !user->isSupport())
-				? tr::lng_info_bot_title()
-				: tr::lng_info_user_title();
-		} else if (const auto channel = peer->asChannel()) {
-			return channel->isMegagroup()
-				? tr::lng_info_group_title()
-				: tr::lng_info_channel_title();
-		} else if (peer->isChat()) {
-			return tr::lng_info_group_title();
-		}
-		Unexpected("Bad peer type in Info::TitleValue()");
-
-	case Section::Type::Media:
-		if (peer->sharedMediaInfo() && isStackBottom) {
-			return tr::lng_profile_shared_media();
-		}
-		switch (section.mediaType()) {
-		case Section::MediaType::Photo:
-			return tr::lng_media_type_photos();
-		case Section::MediaType::GIF:
-			return tr::lng_media_type_gifs();
-		case Section::MediaType::Video:
-			return tr::lng_media_type_videos();
-		case Section::MediaType::MusicFile:
-			return tr::lng_media_type_songs();
-		case Section::MediaType::File:
-			return tr::lng_media_type_files();
-		case Section::MediaType::RoundVoiceFile:
-			return tr::lng_media_type_audios();
-		case Section::MediaType::Link:
-			return tr::lng_media_type_links();
-		case Section::MediaType::RoundFile:
-			return tr::lng_media_type_rounds();
-		}
-		Unexpected("Bad media type in Info::TitleValue()");
-
-	case Section::Type::CommonGroups:
-		return tr::lng_profile_common_groups_section();
-
-	case Section::Type::Members:
-		if (const auto channel = peer->asChannel()) {
-			return channel->isMegagroup()
-				? tr::lng_profile_participants_section()
-				: tr::lng_profile_subscribers_section();
-		}
-		return tr::lng_profile_participants_section();
-
-	case Section::Type::Settings:
-		return section.settingsType()()->title();
-
-	case Section::Type::PollResults:
-		return key.poll()->quiz()
-			? tr::lng_polls_quiz_results_title()
-			: tr::lng_polls_poll_results_title();
-
-	case Section::Type::Downloads:
-		return tr::lng_downloads_section();
-
-	}
-	Unexpected("Bad section type in Info::TitleValue()");
-}
-
 } // namespace Info

Telegram/SourceFiles/info/info_top_bar.h

@@ -35,11 +35,6 @@ namespace Info {
 class Key;
 class Section;
 
-rpl::producer<QString> TitleValue(
-	const Section &section,
-	Key key,
-	bool isStackBottom);
-
 class TopBar : public Ui::RpWidget {
 public:
 	TopBar(

Telegram/SourceFiles/info/info_wrap_widget.cpp

@@ -355,10 +355,6 @@ void WrapWidget::createTopBar() {
 		_content->selectionAction(action);
 	}, _topBar->lifetime());
 
-	_topBar->setTitle(TitleValue(
-		_controller->section(),
-		_controller->key(),
-		!hasStackHistory()));
 	if (wrapValue == Wrap::Narrow || hasStackHistory()) {
 		_topBar->enableBackButton();
 		_topBar->backRequest(
@@ -616,8 +612,9 @@ void WrapWidget::showContent(object_ptr<ContentWidget> content) {
 }
 
 void WrapWidget::finishShowContent() {
-	_content->setIsStackBottom(!hasStackHistory());
 	updateContentGeometry();
+	_content->setIsStackBottom(!hasStackHistory());
+	_topBar->setTitle(_content->title());
 	_desiredHeights.fire(desiredHeightForContent());
 	_desiredShadowVisibilities.fire(_content->desiredShadowVisibility());
 	_selectedLists.fire(_content->selectedListValue());

Telegram/SourceFiles/info/media/info_media_widget.cpp

@@ -15,6 +15,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/ui_utility.h"
 #include "data/data_peer.h"
 #include "data/data_user.h"
+#include "lang/lang_keys.h"
 #include "styles/style_info.h"
 
 namespace Info {
@@ -97,7 +98,33 @@ void Widget::selectionAction(SelectionAction action) {
 	_inner->selectionAction(action);
 }
 
+rpl::producer<QString> Widget::title() {
+	if (controller()->key().peer()->sharedMediaInfo() && isStackBottom()) {
+		return tr::lng_profile_shared_media();
+	}
+	switch (controller()->section().mediaType()) {
+	case Section::MediaType::Photo:
+		return tr::lng_media_type_photos();
+	case Section::MediaType::GIF:
+		return tr::lng_media_type_gifs();
+	case Section::MediaType::Video:
+		return tr::lng_media_type_videos();
+	case Section::MediaType::MusicFile:
+		return tr::lng_media_type_songs();
+	case Section::MediaType::File:
+		return tr::lng_media_type_files();
+	case Section::MediaType::RoundVoiceFile:
+		return tr::lng_media_type_audios();
+	case Section::MediaType::Link:
+		return tr::lng_media_type_links();
+	case Section::MediaType::RoundFile:
+		return tr::lng_media_type_rounds();
+	}
+	Unexpected("Bad media type in Info::TitleValue()");
+}
+
 void Widget::setIsStackBottom(bool isStackBottom) {
+	ContentWidget::setIsStackBottom(isStackBottom);
 	_inner->setIsStackBottom(isStackBottom);
 }
 

Telegram/SourceFiles/info/media/info_media_widget.h

@@ -108,6 +108,8 @@ public:
 	rpl::producer<SelectedItems> selectedListValue() const override;
 	void selectionAction(SelectionAction action) override;
 
+	rpl::producer<QString> title() override;
+
 private:
 	void saveState(not_null<Memento*> memento);
 	void restoreState(not_null<Memento*> memento);

Telegram/SourceFiles/info/members/info_members_widget.cpp

@@ -11,6 +11,9 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "info/info_controller.h"
 #include "ui/widgets/scroll_area.h"
 #include "ui/ui_utility.h"
+#include "data/data_peer.h"
+#include "data/data_channel.h"
+#include "lang/lang_keys.h"
 #include "styles/style_info.h"
 
 namespace Info {
@@ -79,6 +82,15 @@ void Widget::setInternalState(
 	restoreState(memento);
 }
 
+rpl::producer<QString> Widget::title() {
+	if (const auto channel = controller()->key().peer()->asChannel()) {
+		return channel->isMegagroup()
+			? tr::lng_profile_participants_section()
+			: tr::lng_profile_subscribers_section();
+	}
+	return tr::lng_profile_participants_section();
+}
+
 std::shared_ptr<ContentMemento> Widget::doCreateMemento() {
 	auto result = std::make_shared<Memento>(controller());
 	saveState(result.get());

Telegram/SourceFiles/info/members/info_members_widget.h

@@ -56,6 +56,8 @@ public:
 		const QRect &geometry,
 		not_null<Memento*> memento);
 
+	rpl::producer<QString> title() override;
+
 private:
 	void saveState(not_null<Memento*> memento);
 	void restoreState(not_null<Memento*> memento);

Telegram/SourceFiles/info/polls/info_polls_results_widget.cpp

@@ -9,6 +9,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "info/polls/info_polls_results_inner_widget.h"
 #include "boxes/peer_list_box.h"
+#include "lang/lang_keys.h"
+#include "data/data_poll.h"
 
 namespace Info {
 namespace Polls {
@@ -88,6 +90,12 @@ void Widget::setInternalState(
 	restoreState(memento);
 }
 
+rpl::producer<QString> Widget::title() {
+	return poll()->quiz()
+		? tr::lng_polls_quiz_results_title()
+		: tr::lng_polls_poll_results_title();
+}
+
 std::shared_ptr<ContentMemento> Widget::doCreateMemento() {
 	auto result = std::make_shared<Memento>(poll(), contextId());
 	saveState(result.get());

Telegram/SourceFiles/info/polls/info_polls_results_widget.h

@@ -56,6 +56,8 @@ public:
 		const QRect &geometry,
 		not_null<Memento*> memento);
 
+	rpl::producer<QString> title() override;
+
 private:
 	void saveState(not_null<Memento*> memento);
 	void restoreState(not_null<Memento*> memento);

Telegram/SourceFiles/info/profile/info_profile_inner_widget.h

@@ -44,9 +44,6 @@ public:
 	void saveState(not_null<Memento*> memento);
 	void restoreState(not_null<Memento*> memento);
 
-	void setIsStackBottom(bool isStackBottom) {
-		_isStackBottom = isStackBottom;
-	}
 	rpl::producer<Ui::ScrollToRequest> scrollToRequests() const;
 	rpl::producer<int> desiredHeightValue() const override;
 
@@ -68,8 +65,6 @@ private:
 	bool canHideDetailsEver() const;
 	rpl::producer<bool> canHideDetails() const;
 
-	rpl::variable<bool> _isStackBottom = true;
-
 	const not_null<Controller*> _controller;
 	const not_null<PeerData*> _peer;
 	PeerData * const _migrated = nullptr;

Telegram/SourceFiles/info/profile/info_profile_widget.cpp

@@ -11,6 +11,10 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "info/profile/info_profile_members.h"
 #include "ui/widgets/scroll_area.h"
 #include "ui/ui_utility.h"
+#include "data/data_peer.h"
+#include "data/data_channel.h"
+#include "data/data_user.h"
+#include "lang/lang_keys.h"
 #include "info/info_controller.h"
 
 namespace Info {
@@ -72,14 +76,27 @@ Widget::Widget(
 	}, lifetime());
 }
 
-void Widget::setIsStackBottom(bool isStackBottom) {
-	_inner->setIsStackBottom(isStackBottom);
-}
-
 void Widget::setInnerFocus() {
 	_inner->setFocus();
 }
 
+rpl::producer<QString> Widget::title() {
+	const auto peer = controller()->key().peer();
+	if (const auto user = peer->asUser()) {
+		return (user->isBot() && !user->isSupport())
+			? tr::lng_info_bot_title()
+			: tr::lng_info_user_title();
+	} else if (const auto channel = peer->asChannel()) {
+		return channel->isMegagroup()
+			? tr::lng_info_group_title()
+			: tr::lng_info_channel_title();
+	} else if (peer->isChat()) {
+		return tr::lng_info_group_title();
+	}
+	Unexpected("Bad peer type in Info::TitleValue()");
+
+}
+
 bool Widget::showInternal(not_null<ContentMemento*> memento) {
 	if (!controller()->validateMementoPeer(memento)) {
 		return false;

Telegram/SourceFiles/info/profile/info_profile_widget.h

@@ -51,8 +51,6 @@ public:
 		QWidget *parent,
 		not_null<Controller*> controller);
 
-	void setIsStackBottom(bool isStackBottom) override;
-
 	bool showInternal(
 		not_null<ContentMemento*> memento) override;
 
@@ -62,6 +60,8 @@ public:
 
 	void setInnerFocus() override;
 
+	rpl::producer<QString> title() override;
+
 private:
 	void saveState(not_null<Memento*> memento);
 	void restoreState(not_null<Memento*> memento);

Telegram/SourceFiles/info/settings/info_settings_widget.cpp

@@ -90,6 +90,10 @@ rpl::producer<bool> Widget::desiredShadowVisibility() const {
 		: rpl::single(true);
 }
 
+rpl::producer<QString> Widget::title() {
+	return _type()->title();
+}
+
 std::shared_ptr<ContentMemento> Widget::doCreateMemento() {
 	auto result = std::make_shared<Memento>(self(), _type);
 	saveState(result.get());

Telegram/SourceFiles/info/settings/info_settings_widget.h

@@ -67,6 +67,8 @@ public:
 
 	rpl::producer<bool> desiredShadowVisibility() const override;
 
+	rpl::producer<QString> title() override;
+
 private:
 	void saveState(not_null<Memento*> memento);
 	void restoreState(not_null<Memento*> memento);