Topics list in forum chats list entry.

Telegram/CMakeLists.txt

@@ -581,6 +581,8 @@ PRIVATE
     dialogs/ui/dialogs_layout.h
     dialogs/ui/dialogs_message_view.cpp
     dialogs/ui/dialogs_message_view.h
+    dialogs/ui/dialogs_topics_view.cpp
+    dialogs/ui/dialogs_topics_view.h
     dialogs/ui/dialogs_video_userpic.cpp
     dialogs/ui/dialogs_video_userpic.h
     editor/color_picker.cpp

Telegram/SourceFiles/data/data_folder.cpp

@@ -179,7 +179,7 @@ void Folder::reorderLastHistories() {
 		const auto bDate = bItem ? bItem->date() : TimeId(0);
 		return aDate > bDate;
 	};
-	_lastHistories.erase(_lastHistories.begin(), _lastHistories.end());
+	_lastHistories.clear();
 	_lastHistories.reserve(kShowChatNamesCount + 1);
 	auto &&histories = ranges::views::all(
 		*_chatsList.indexed()
@@ -187,11 +187,13 @@ void Folder::reorderLastHistories() {
 		return row->history();
 	}) | ranges::views::filter([](History *history) {
 		return (history != nullptr);
-	}) | ranges::views::transform([](History *history) {
-		return not_null<History*>(history);
 	});
+	auto nonPinnedChecked = 0;
 	for (const auto history : histories) {
-		const auto i = ranges::upper_bound(_lastHistories, history, pred);
+		const auto i = ranges::upper_bound(
+			_lastHistories,
+			not_null(history),
+			pred);
 		if (size(_lastHistories) < kShowChatNamesCount
 			|| i != end(_lastHistories)) {
 			_lastHistories.insert(i, history);
@@ -199,6 +201,10 @@ void Folder::reorderLastHistories() {
 		if (size(_lastHistories) > kShowChatNamesCount) {
 			_lastHistories.pop_back();
 		}
+		if (!history->isPinnedDialog(FilterId())
+			&& ++nonPinnedChecked >= kShowChatNamesCount) {
+			break;
+		}
 	}
 	++_chatListViewVersion;
 	updateChatListEntry();

Telegram/SourceFiles/data/data_forum.cpp

@@ -37,6 +37,7 @@ constexpr auto kTopicsFirstLoad = 20;
 constexpr auto kLoadedTopicsMinCount = 20;
 constexpr auto kTopicsPerPage = 500;
 constexpr auto kStalePerRequest = 100;
+constexpr auto kShowTopicNamesCount = 8;
 // constexpr auto kGeneralColorId = 0xA9A9A9;
 
 } // namespace
@@ -172,6 +173,11 @@ void Forum::applyTopicDeleted(MsgId rootId) {
 		const auto raw = i->second.get();
 		Core::App().notifications().clearFromTopic(raw);
 		owner().removeChatListEntry(raw);
+
+		if (ranges::contains(_lastTopics, not_null(raw))) {
+			reorderLastTopics();
+		}
+
 		_topicDestroyed.fire(raw);
 		_topics.erase(i);
 
@@ -183,6 +189,65 @@ void Forum::applyTopicDeleted(MsgId rootId) {
 	}
 }
 
+void Forum::reorderLastTopics() {
+	// We want first kShowChatNamesCount histories, by last message date.
+	const auto pred = [](not_null<ForumTopic*> a, not_null<ForumTopic*> b) {
+		const auto aItem = a->chatListMessage();
+		const auto bItem = b->chatListMessage();
+		const auto aDate = aItem ? aItem->date() : TimeId(0);
+		const auto bDate = bItem ? bItem->date() : TimeId(0);
+		return aDate > bDate;
+	};
+	_lastTopics.clear();
+	_lastTopics.reserve(kShowTopicNamesCount + 1);
+	auto &&topics = ranges::views::all(
+		*_topicsList.indexed()
+	) | ranges::views::transform([](not_null<Dialogs::Row*> row) {
+		return row->topic();
+	});
+	auto nonPinnedChecked = 0;
+	for (const auto topic : topics) {
+		const auto i = ranges::upper_bound(
+			_lastTopics,
+			not_null(topic),
+			pred);
+		if (size(_lastTopics) < kShowTopicNamesCount
+			|| i != end(_lastTopics)) {
+			_lastTopics.insert(i, topic);
+		}
+		if (size(_lastTopics) > kShowTopicNamesCount) {
+			_lastTopics.pop_back();
+		}
+		if (!topic->isPinnedDialog(FilterId())
+			&& ++nonPinnedChecked >= kShowTopicNamesCount) {
+			break;
+		}
+	}
+	++_lastTopicsVersion;
+	_history->updateChatListEntry();
+}
+
+int Forum::recentTopicsListVersion() const {
+	return _lastTopicsVersion;
+}
+
+void Forum::recentTopicsInvalidate(not_null<ForumTopic*> topic) {
+	if (ranges::contains(_lastTopics, topic)) {
+		++_lastTopicsVersion;
+		_history->updateChatListEntry();
+	}
+}
+
+const std::vector<not_null<ForumTopic*>> &Forum::recentTopics() const {
+	return _lastTopics;
+}
+
+void Forum::listMessageChanged(HistoryItem *from, HistoryItem *to) {
+	if (from || to) {
+		reorderLastTopics();
+	}
+}
+
 void Forum::applyReceivedTopics(
 		const MTPmessages_ForumTopics &topics,
 		ForumOffsets &updateOffsets) {
@@ -344,6 +409,8 @@ ForumTopic *Forum::applyTopicAdded(
 	if (!creating(rootId)) {
 		raw->addToChatList(FilterId(), topicsList());
 		_chatsListChanges.fire({});
+
+		reorderLastTopics();
 	}
 	return raw;
 }
@@ -395,6 +462,8 @@ void Forum::created(MsgId rootId, MsgId realId) {
 			realId,
 			std::move(topic)
 		).first->second->setRealRootId(realId);
+
+		reorderLastTopics();
 	}
 	owner().notifyItemIdChange({ id, rootId });
 }

Telegram/SourceFiles/data/data_forum.h

@@ -90,6 +90,12 @@ public:
 	void clearAllUnreadReactions();
 	void enumerateTopics(Fn<void(not_null<ForumTopic*>)> action) const;
 
+	void listMessageChanged(HistoryItem *from, HistoryItem *to);
+	[[nodiscard]] int recentTopicsListVersion() const;
+	void recentTopicsInvalidate(not_null<ForumTopic*> topic);
+	[[nodiscard]] auto recentTopics() const
+		-> const std::vector<not_null<ForumTopic*>> &;
+
 	[[nodiscard]] rpl::lifetime &lifetime() {
 		return _lifetime;
 	}
@@ -100,6 +106,7 @@ private:
 		std::vector<Fn<void()>> callbacks;
 	};
 
+	void reorderLastTopics();
 	void requestSomeStale();
 	void finishTopicRequest(MsgId rootId);
 
@@ -119,6 +126,9 @@ private:
 
 	base::flat_set<MsgId> _creatingRootIds;
 
+	std::vector<not_null<ForumTopic*>> _lastTopics;
+	int _lastTopicsVersion = 0;
+
 	rpl::event_stream<> _chatsListChanges;
 	rpl::event_stream<> _chatsListLoadedEvents;
 

Telegram/SourceFiles/data/data_forum_topic.cpp

@@ -178,6 +178,9 @@ ForumTopic::ForumTopic(not_null<Forum*> forum, MsgId rootId)
 	}) | rpl::start_with_next([=](
 			std::optional<int> previous,
 			std::optional<int> now) {
+		if (previous.value_or(0) != now.value_or(0)) {
+			_forum->recentTopicsInvalidate(this);
+		}
 		notifyUnreadStateChange(unreadStateFor(
 			previous.value_or(0),
 			previous.has_value()));
@@ -489,7 +492,9 @@ void ForumTopic::setLastMessage(HistoryItem *item) {
 void ForumTopic::setChatListMessage(HistoryItem *item) {
 	if (_chatListMessage && *_chatListMessage == item) {
 		return;
-	} else if (item) {
+	}
+	const auto was = _chatListMessage.value_or(nullptr);
+	if (item) {
 		if (item->isSponsored()) {
 			return;
 		}
@@ -505,6 +510,7 @@ void ForumTopic::setChatListMessage(HistoryItem *item) {
 		_chatListMessage = nullptr;
 		updateChatListEntry();
 	}
+	_forum->listMessageChanged(was, item);
 }
 
 void ForumTopic::loadUserpic() {
@@ -625,6 +631,7 @@ void ForumTopic::applyTitle(const QString &title) {
 	}
 	_title = title;
 	++_titleVersion;
+	_forum->recentTopicsInvalidate(this);
 	_defaultIcon = QImage();
 	indexTitleParts();
 	updateChatListEntry();

Telegram/SourceFiles/dialogs/dialogs.style

@@ -17,6 +17,8 @@ DialogRow {
 	nameTop: pixels;
 	textLeft: pixels;
 	textTop: pixels;
+	topicsSkip: pixels;
+	topicsHeight: pixels;
 }
 
 ForumTopicIcon {
@@ -71,8 +73,11 @@ defaultDialogRow: DialogRow {
 	textLeft: 68px;
 	textTop: 34px;
 }
-forumDialogRow: DialogRow {
+forumDialogRow: DialogRow(defaultDialogRow) {
 	height: 80px;
+	textTop: 32px;
+	topicsSkip: 8px;
+	topicsHeight: 20px;
 }
 
 dialogsOnlineBadgeStroke: 2px;
@@ -151,6 +156,21 @@ dialogsTextPaletteArchiveActive: TextPalette(defaultTextPalette) {
 	monoFg: dialogsTextFgActive;
 	spoilerFg: dialogsTextFgActive;
 }
+dialogsTextPaletteInTopic: TextPalette(defaultTextPalette) {
+	linkFg: dialogsNameFg;
+	monoFg: dialogsTextFg;
+	spoilerFg: dialogsTextFg;
+}
+dialogsTextPaletteInTopicOver: TextPalette(defaultTextPalette) {
+	linkFg: dialogsNameFgOver;
+	monoFg: dialogsTextFgOver;
+	spoilerFg: dialogsTextFgOver;
+}
+dialogsTextPaletteInTopicActive: TextPalette(defaultTextPalette) {
+	linkFg: dialogsNameFgActive;
+	monoFg: dialogsTextFgActive;
+	spoilerFg: dialogsTextFgActive;
+}
 
 dialogsEmptyHeight: 160px;
 dialogsEmptySkip: 2px;

Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp

@@ -532,12 +532,21 @@ void InnerWidget::paintEvent(QPaintEvent *e) {
 					: Key()));
 		if (shownBottom) {
 			const auto skip = dialogsOffset();
-			auto reorderingPinned = (_aboveIndex >= 0 && !_pinnedRows.empty());
-			if (reorderingPinned) {
-				dialogsClip = dialogsClip.marginsAdded(QMargins(0, _st->height, 0, _st->height));
-			}
-
 			const auto promoted = fixedOnTopCount();
+			const auto reorderingPinned = (_aboveIndex >= 0)
+				&& !_pinnedRows.empty();
+			const auto reorderingIndex = promoted + _aboveIndex;
+			const auto reorderingRow = (reorderingIndex < list.size())
+				? (list.cbegin() + reorderingIndex)->get()
+				: nullptr;
+			if (reorderingRow) {
+				dialogsClip = dialogsClip.marginsAdded({
+					0,
+					reorderingRow->height(),
+					0,
+					reorderingRow->height(),
+				});
+			}
 			const auto skippedTop = skipTopHeight();
 			const auto paintDialog = [&](not_null<Row*> row) {
 				const auto pinned = row->index() - promoted;
@@ -552,8 +561,10 @@ void InnerWidget::paintEvent(QPaintEvent *e) {
 				const auto key = row->key();
 				const auto isActive = (key == active);
 				const auto isSelected = (key == selected);
+				const auto isForum = key.history()
+					&& key.history()->peer->isForum();
 				Ui::RowPainter::Paint(p, row, validateVideoUserpic(row), {
-					.st = _st,
+					.st = (isForum ? &st::forumDialogRow : _st.get()),
 					.folder = _openedFolder,
 					.forum = _openedForum,
 					.filter = _filterId,
@@ -600,14 +611,10 @@ void InnerWidget::paintEvent(QPaintEvent *e) {
 				}
 
 				// Paint the dragged chat above all others.
-				if (_aboveIndex >= 0) {
-					const auto index = promoted + _aboveIndex;
-					if (index < list.size()) {
-						const auto row = *(list.cbegin() + index);
-						p.translate(0, row->top() - top);
-						paintDialog(*i);
-						p.translate(0, top - row->top());
-					}
+				if (reorderingRow) {
+					p.translate(0, reorderingRow->top() - top);
+					paintDialog(reorderingRow);
+					p.translate(0, top - reorderingRow->top());
 				}
 			}
 		} else {
@@ -678,8 +685,10 @@ void InnerWidget::paintEvent(QPaintEvent *e) {
 					: (from == (isPressed()
 						? _filteredPressed
 						: _filteredSelected));
+				const auto isForum = key.history()
+					&& key.history()->peer->isForum();
 				Ui::RowPainter::Paint(p, row, validateVideoUserpic(row), {
-					.st = _st,
+					.st = (isForum ? &st::forumDialogRow : _st.get()),
 					.folder = _openedFolder,
 					.forum = _openedForum,
 					.filter = _filterId,
@@ -1422,25 +1431,26 @@ bool InnerWidget::updateReorderPinned(QPoint localPosition) {
 		return false;
 	}
 
+	const auto draggingHeight = _dragging->height();
 	auto yaddWas = _pinnedRows[_draggingIndex].yadd.current();
 	auto shift = 0;
 	auto now = crl::now();
 	if (_dragStart.y() > localPosition.y() && _draggingIndex > 0) {
-		shift = -floorclamp(_dragStart.y() - localPosition.y() + (_st->height / 2), _st->height, 0, _draggingIndex);
+		shift = -floorclamp(_dragStart.y() - localPosition.y() + (draggingHeight / 2), draggingHeight, 0, _draggingIndex);
 
 		for (auto from = _draggingIndex, to = _draggingIndex + shift; from > to; --from) {
 			_shownList->movePinned(_dragging, -1);
 			std::swap(_pinnedRows[from], _pinnedRows[from - 1]);
-			_pinnedRows[from].yadd = anim::value(_pinnedRows[from].yadd.current() - _st->height, 0);
+			_pinnedRows[from].yadd = anim::value(_pinnedRows[from].yadd.current() - draggingHeight, 0);
 			_pinnedRows[from].animStartTime = now;
 		}
 	} else if (_dragStart.y() < localPosition.y() && _draggingIndex + 1 < pinnedCount) {
-		shift = floorclamp(localPosition.y() - _dragStart.y() + (_st->height / 2), _st->height, 0, pinnedCount - _draggingIndex - 1);
+		shift = floorclamp(localPosition.y() - _dragStart.y() + (draggingHeight / 2), draggingHeight, 0, pinnedCount - _draggingIndex - 1);
 
 		for (auto from = _draggingIndex, to = _draggingIndex + shift; from < to; ++from) {
 			_shownList->movePinned(_dragging, 1);
 			std::swap(_pinnedRows[from], _pinnedRows[from + 1]);
-			_pinnedRows[from].yadd = anim::value(_pinnedRows[from].yadd.current() + _st->height, 0);
+			_pinnedRows[from].yadd = anim::value(_pinnedRows[from].yadd.current() + draggingHeight, 0);
 			_pinnedRows[from].animStartTime = now;
 		}
 	}

Telegram/SourceFiles/dialogs/dialogs_row.cpp

@@ -149,6 +149,8 @@ Row::Row(Key key, int index, int top) : _id(key), _top(top), _index(index) {
 		_height = history->peer->isForum()
 			? st::forumDialogRow.height
 			: st::defaultDialogRow.height;
+	} else if (key.folder()) {
+		_height = st::defaultDialogRow.height;
 	} else {
 		_height = st::forumTopicRow.height;
 	}

Telegram/SourceFiles/dialogs/ui/dialogs_layout.cpp

@@ -216,17 +216,11 @@ void PaintListEntryText(
 	row->listEntryCache().draw(p, {
 		.position = rect.topLeft(),
 		.availableWidth = rect.width(),
-		.palette = &(row->folder()
-			? (context.active
-				? st::dialogsTextPaletteArchiveActive
-				: context.selected
-				? st::dialogsTextPaletteArchiveOver
-				: st::dialogsTextPaletteArchive)
-			: (context.active
-				? st::dialogsTextPaletteActive
-				: context.selected
-				? st::dialogsTextPaletteOver
-				: st::dialogsTextPalette)),
+		.palette = &(context.active
+			? st::dialogsTextPaletteArchiveActive
+			: context.selected
+			? st::dialogsTextPaletteArchiveOver
+			: st::dialogsTextPaletteArchive),
 		.spoiler = Text::DefaultSpoilerCache(),
 		.now = context.now,
 		.paused = context.paused,
@@ -897,7 +891,7 @@ void RowPainter::Paint(
 			: context.selected
 			? st::dialogsTextFgServiceOver
 			: st::dialogsTextFgService;
-		const auto rect = QRect(
+		auto rect = QRect(
 			nameleft,
 			texttop,
 			availableWidth,
@@ -926,6 +920,13 @@ void RowPainter::Paint(
 					[=] { entry->updateChatListEntry(); },
 					{ .ignoreTopic = (!history || !peer->isForum()) });
 			}
+			if (const auto topics = context.st->topicsHeight) {
+				view->prepareTopics(
+					row->history()->peer->forum(),
+					rect,
+					[=] { entry->updateChatListEntry(); });
+				rect.setHeight(topics + rect.height());
+			}
 			view->paint(p, rect, context);
 		}
 	};

Telegram/SourceFiles/dialogs/ui/dialogs_message_view.cpp

@@ -12,6 +12,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/view/history_view_item_preview.h"
 #include "main/main_session.h"
 #include "dialogs/ui/dialogs_layout.h"
+#include "dialogs/ui/dialogs_topics_view.h"
 #include "ui/text/text_options.h"
 #include "ui/text/text_utilities.h"
 #include "ui/image/image.h"
@@ -111,7 +112,6 @@ struct MessageView::LoadingContext {
 
 MessageView::MessageView()
 : _senderCache(st::dialogsTextWidthMin)
-, _topicCache(st::dialogsTextWidthMin)
 , _textCache(st::dialogsTextWidthMin) {
 }
 
@@ -135,11 +135,11 @@ void MessageView::prepare(
 		not_null<const HistoryItem*> item,
 		Fn<void()> customEmojiRepaint,
 		ToPreviewOptions options) {
+	const auto validateTopics = !options.ignoreTopic;
 	options.existing = &_imagesCache;
+	options.ignoreTopic = true;
 	auto preview = item->toPreview(options);
 	const auto hasImages = !preview.images.empty();
-	const auto hasArrow = (preview.arrowInTextPosition > 0)
-		&& (preview.imagesInTextPosition > preview.arrowInTextPosition);
 	const auto history = item->history();
 	const auto context = Core::MarkedTextContext{
 		.session = &history->session(),
@@ -149,7 +149,7 @@ void MessageView::prepare(
 	const auto senderTill = (preview.arrowInTextPosition > 0)
 		? preview.arrowInTextPosition
 		: preview.imagesInTextPosition;
-	if ((hasImages || hasArrow) && senderTill > 0) {
+	if (hasImages && senderTill > 0) {
 		auto sender = Text::Mid(preview.text, 0, senderTill);
 		TextUtilities::Trim(sender);
 		_senderCache.setMarkedText(
@@ -157,24 +157,8 @@ void MessageView::prepare(
 			std::move(sender),
 			DialogTextOptions());
 		const auto topicTill = preview.imagesInTextPosition;
-		if (hasArrow && hasImages) {
-			auto topic = Text::Mid(
-				preview.text,
-				senderTill,
-				topicTill - senderTill);
-			TextUtilities::Trim(topic);
-			_topicCache.setMarkedText(
-				st::dialogsTextStyle,
-				std::move(topic),
-				DialogTextOptions(),
-				context);
-			preview.text = Text::Mid(preview.text, topicTill);
-		} else {
-			preview.text = Text::Mid(preview.text, senderTill);
-			_topicCache = { st::dialogsTextWidthMin };
-		}
+		preview.text = Text::Mid(preview.text, senderTill);
 	} else {
-		_topicCache = { st::dialogsTextWidthMin };
 		_senderCache = { st::dialogsTextWidthMin };
 	}
 	TextUtilities::Trim(preview.text);
@@ -199,6 +183,19 @@ void MessageView::prepare(
 	}
 }
 
+void MessageView::prepareTopics(
+		not_null<Data::Forum*> forum,
+		const QRect &geometry,
+		Fn<void()> customEmojiRepaint) {
+	if (!_topics || _topics->forum() != forum) {
+		_topics = std::make_unique<TopicsView>(forum);
+	}
+	_topics->prepare(
+		geometry,
+		&st::forumDialogRow,
+		std::move(customEmojiRepaint));
+}
+
 void MessageView::paint(
 		Painter &p,
 		const QRect &geometry,
@@ -212,13 +209,25 @@ void MessageView::paint(
 		: context.selected
 		? st::dialogsTextFgOver
 		: st::dialogsTextFg);
-	const auto palette = &(context.active
-		? st::dialogsTextPaletteActive
-		: context.selected
-		? st::dialogsTextPaletteOver
-		: st::dialogsTextPalette);
+	const auto withTopic = _topics && context.st->topicsHeight;
+	const auto palette = &(withTopic
+		? (context.active
+			? st::dialogsTextPaletteInTopicActive
+			: context.selected
+			? st::dialogsTextPaletteInTopicOver
+			: st::dialogsTextPaletteInTopic)
+		: (context.active
+			? st::dialogsTextPaletteActive
+			: context.selected
+			? st::dialogsTextPaletteOver
+			: st::dialogsTextPalette));
 
 	auto rect = geometry;
+	if (withTopic) {
+		_topics->paint(p, rect, context);
+		rect.setTop(rect.top() + context.st->topicsHeight);
+	}
+
 	const auto lines = rect.height() / st::dialogsTextFont->height;
 	if (!_senderCache.isEmpty()) {
 		_senderCache.draw(p, {
@@ -228,32 +237,6 @@ void MessageView::paint(
 			.elisionLines = lines,
 		});
 		rect.setLeft(rect.x() + _senderCache.maxWidth());
-		if (!_topicCache.isEmpty() || _imagesCache.empty()) {
-			const auto skip = st::dialogsTopicArrowSkip;
-			if (rect.width() >= skip) {
-				const auto &icon = st::dialogsTopicArrow;
-				icon.paint(
-					p,
-					rect.x() + (skip - icon.width()) / 2,
-					rect.y() + st::dialogsTopicArrowTop,
-					geometry.width());
-			}
-			rect.setLeft(rect.x() + skip);
-		}
-		if (!_topicCache.isEmpty()) {
-			if (!rect.isEmpty()) {
-				_topicCache.draw(p, {
-					.position = rect.topLeft(),
-					.availableWidth = rect.width(),
-					.palette = palette,
-					.spoiler = Text::DefaultSpoilerCache(),
-					.now = context.now,
-					.paused = context.paused,
-					.elisionLines = lines,
-				});
-			}
-			rect.setLeft(rect.x() + _topicCache.maxWidth());
-		}
 		if (!_imagesCache.empty()) {
 			const auto skip = st::dialogsMiniPreviewSkip
 				+ st::dialogsMiniPreviewRight;

Telegram/SourceFiles/dialogs/ui/dialogs_message_view.h

@@ -16,6 +16,10 @@ enum class ImageRoundRadius;
 namespace Ui {
 } // namespace Ui
 
+namespace Data {
+class Forum;
+} // namespace Data
+
 namespace HistoryView {
 struct ToPreviewOptions;
 struct ItemPreviewImage;
@@ -27,6 +31,7 @@ namespace Dialogs::Ui {
 using namespace ::Ui;
 
 struct PaintContext;
+class TopicsView;
 
 [[nodiscard]] TextWithEntities DialogsPreviewText(TextWithEntities text);
 
@@ -47,6 +52,12 @@ public:
 		not_null<const HistoryItem*> item,
 		Fn<void()> customEmojiRepaint,
 		ToPreviewOptions options);
+
+	void prepareTopics(
+		not_null<Data::Forum*> forum,
+		const QRect &geometry,
+		Fn<void()> customEmojiRepaint);
+
 	void paint(
 		Painter &p,
 		const QRect &geometry,
@@ -57,7 +68,7 @@ private:
 
 	mutable const HistoryItem *_textCachedFor = nullptr;
 	mutable Text::String _senderCache;
-	mutable Text::String _topicCache;
+	mutable std::unique_ptr<TopicsView> _topics;
 	mutable Text::String _textCache;
 	mutable std::vector<ItemPreviewImage> _imagesCache;
 	mutable std::unique_ptr<LoadingContext> _loadingContext;

Telegram/SourceFiles/dialogs/ui/dialogs_topics_view.cpp

@@ -0,0 +1,112 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "dialogs/ui/dialogs_topics_view.h"
+
+#include "dialogs/ui/dialogs_layout.h"
+#include "data/data_forum.h"
+#include "data/data_forum_topic.h"
+#include "core/ui_integration.h"
+#include "ui/painter.h"
+#include "ui/text/text_options.h"
+#include "ui/text/text_utilities.h"
+#include "styles/style_dialogs.h"
+
+namespace Dialogs::Ui {
+namespace {
+
+constexpr auto kIconLoopCount = 1;
+
+} // namespace
+
+TopicsView::TopicsView(not_null<Data::Forum*> forum)
+: _forum(forum) {
+}
+
+TopicsView::~TopicsView() = default;
+
+void TopicsView::prepare(
+		const QRect &geometry,
+		not_null<const style::DialogRow*> st,
+		Fn<void()> customEmojiRepaint) {
+	auto index = 0;
+	auto available = geometry.width();
+	for (const auto &topic : _forum->recentTopics()) {
+		if (available <= 0) {
+			break;
+		} else if (_titles.size() == index) {
+			_titles.emplace_back();
+		}
+		auto &title = _titles[index];
+		const auto rootId = topic->rootId();
+		const auto unread = topic->chatListBadgesState().unread;
+		if (title.topicRootId != rootId || title.unread != unread) {
+			const auto context = Core::MarkedTextContext{
+				.session = &topic->session(),
+				.customEmojiRepaint = customEmojiRepaint,
+				.customEmojiLoopLimit = kIconLoopCount,
+			};
+			auto topicTitle = topic->titleWithIcon();
+			title.title.setMarkedText(
+				st::dialogsTextStyle,
+				(unread
+					? Ui::Text::PlainLink(
+						Ui::Text::Wrapped(
+							std::move(topicTitle),
+							EntityType::Bold))
+					: std::move(topicTitle)),
+				DialogTextOptions(),
+				context);
+			title.topicRootId = rootId;
+			title.unread = unread;
+		}
+		available -= title.title.maxWidth() + st->topicsSkip;
+		++index;
+	}
+	while (_titles.size() > index) {
+		_titles.pop_back();
+	}
+}
+
+void TopicsView::paint(
+		Painter &p,
+		const QRect &geometry,
+		const PaintContext &context) const {
+	auto available = geometry.width();
+
+	p.setFont(st::dialogsTextFont);
+	p.setPen(context.active
+		? st::dialogsTextFgActive
+		: context.selected
+		? st::dialogsTextFgOver
+		: st::dialogsTextFg);
+	const auto palette = &(context.active
+		? st::dialogsTextPaletteArchiveActive
+		: context.selected
+		? st::dialogsTextPaletteArchiveOver
+		: st::dialogsTextPaletteArchive);
+	auto index = 0;
+	auto rect = geometry;
+	for (const auto &title : _titles) {
+		if (rect.width() <= 0) {
+			break;
+		}
+		title.title.draw(p, {
+			.position = rect.topLeft(),
+			.availableWidth = rect.width(),
+			.palette = palette,
+			.spoiler = Text::DefaultSpoilerCache(),
+			.now = context.now,
+			.paused = context.paused,
+			.elisionLines = 1,
+		});
+		rect.setLeft(
+			rect.left() + title.title.maxWidth() + context.st->topicsSkip);
+	}
+}
+
+} // namespace Dialogs::Ui

Telegram/SourceFiles/dialogs/ui/dialogs_topics_view.h

@@ -0,0 +1,67 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+class Painter;
+
+namespace style {
+struct DialogRow;
+} // namespace style
+
+namespace Data {
+class Forum;
+class ForumTopic;
+} // namespace Data
+
+namespace Ui {
+} // namespace Ui
+
+namespace Dialogs::Ui {
+
+using namespace ::Ui;
+
+struct PaintContext;
+
+class TopicsView final {
+public:
+	explicit TopicsView(not_null<Data::Forum*> forum);
+	~TopicsView();
+
+	[[nodiscard]] not_null<Data::Forum*> forum() const {
+		return _forum;
+	}
+
+	void prepare(
+		const QRect &geometry,
+		not_null<const style::DialogRow*> st,
+		Fn<void()> customEmojiRepaint);
+
+	void paint(
+		Painter &p,
+		const QRect &geometry,
+		const PaintContext &context) const;
+
+	[[nodiscard]] rpl::lifetime &lifetime() {
+		return _lifetime;
+	}
+
+private:
+	struct Title {
+		Text::String title;
+		MsgId topicRootId = 0;
+		bool unread = false;
+	};
+	const not_null<Data::Forum*> _forum;
+
+	mutable std::vector<Title> _titles;
+
+	rpl::lifetime _lifetime;
+
+};
+
+} // namespace Dialogs::Ui

Telegram/SourceFiles/history/history.cpp

@@ -3011,6 +3011,11 @@ void History::forumChanged(Data::Forum *old) {
 		}) | rpl::start_with_next([=](const Dialogs::UnreadState &old) {
 			notifyUnreadStateChange(old);
 		}, forum->lifetime());
+
+		forum->chatsListChanges(
+		) | rpl::start_with_next([=] {
+			updateChatListEntry();
+		}, forum->lifetime());
 	} else {
 		_flags &= ~Flag::IsForum;
 	}

Telegram/SourceFiles/history/view/history_view_list_widget.cpp

@@ -3206,13 +3206,6 @@ void ListWidget::mouseActionFinish(
 	};
 
 	auto activated = ClickHandler::unpressed();
-
-	if (_overElement) {
-		AssertIsDebug();
-		setGeometryCrashAnnotations(_overElement);
-		Unexpected("Test");
-	}
-
 	auto simpleSelectionChange = pressState.itemId
 		&& !_pressWasInactive
 		&& (button != Qt::RightButton)