Update dialog row height on topic switch.

Telegram/SourceFiles/data/data_changes.h

@@ -197,8 +197,9 @@ struct EntryUpdate {
 		HasPinnedMessages = (1U << 1),
 		ForwardDraft = (1U << 2),
 		LocalDraftSet = (1U << 3),
+		Height = (1U << 4),
 
-		LastUsedBit = (1U << 3),
+		LastUsedBit = (1U << 4),
 	};
 	using Flags = base::flags<Flag>;
 	friend inline constexpr auto is_flag_type(Flag) { return true; }

Telegram/SourceFiles/data/data_channel.cpp

@@ -183,6 +183,12 @@ void ChannelData::setFlags(ChannelDataFlags which) {
 			}
 			if (diff & Flag::Forum) {
 				Core::App().notifications().clearFromHistory(history);
+				history->updateChatListEntryHeight();
+				if (history->inChatList()) {
+					if (const auto forum = this->forum()) {
+						forum->preloadTopics();
+					}
+				}
 			}
 		}
 	}

Telegram/SourceFiles/dialogs/dialogs_entry.cpp

@@ -379,4 +379,15 @@ void Entry::updateChatListEntryPostponed() {
 	});
 }
 
+void Entry::updateChatListEntryHeight() {
+	auto &filters = _owner->chatsFilters();
+	for (auto &[filterId, rows] : _chatListLinks) {
+		const auto list = filterId
+			? filters.chatsList(filterId)
+			: _owner->chatsList(folder());
+		list->updateEntryHeight(rows);
+	}
+	session().changes().entryUpdated(this, Data::EntryUpdate::Flag::Height);
+}
+
 } // namespace Dialogs

Telegram/SourceFiles/dialogs/dialogs_entry.h

@@ -192,6 +192,7 @@ public:
 		not_null<Row*> row);
 	void updateChatListEntry();
 	void updateChatListEntryPostponed();
+	void updateChatListEntryHeight();
 	[[nodiscard]] bool isPinnedDialog(FilterId filterId) const {
 		return lookupPinnedIndex(filterId) != 0;
 	}

Telegram/SourceFiles/dialogs/dialogs_indexed_list.cpp

@@ -61,6 +61,15 @@ void IndexedList::adjustByDate(const RowsByLetter &links) {
 	}
 }
 
+void IndexedList::updateHeight(const RowsByLetter &links) {
+	_list.updateHeight(links.main);
+	for (const auto &[ch, row] : links.letters) {
+		if (auto it = _index.find(ch); it != _index.cend()) {
+			it->second.updateHeight(row);
+		}
+	}
+}
+
 void IndexedList::moveToTop(Key key) {
 	if (_list.moveToTop(key)) {
 		for (const auto &ch : key.entry()->chatListFirstLetters()) {

Telegram/SourceFiles/dialogs/dialogs_indexed_list.h

@@ -22,6 +22,7 @@ public:
 	Row *addByName(Key key);
 	void adjustByDate(const RowsByLetter &links);
 	void moveToTop(Key key);
+	void updateHeight(const RowsByLetter &links);
 
 	// row must belong to this indexed list all().
 	void movePinned(Row *row, int deltaSign);

Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp

@@ -285,8 +285,14 @@ InnerWidget::InnerWidget(
 
 	session().changes().entryUpdates(
 		Data::EntryUpdate::Flag::Repaint
+		| Data::EntryUpdate::Flag::Height
 	) | rpl::start_with_next([=](const Data::EntryUpdate &update) {
 		const auto entry = update.entry;
+		if (update.flags & Data::EntryUpdate::Flag::Height) {
+			updateFilteredEntryHeight(entry);
+			refresh();
+			return;
+		}
 		const auto repaintId = (_state == WidgetState::Default)
 			? _filterId
 			: 0;
@@ -320,6 +326,24 @@ InnerWidget::InnerWidget(
 	setupShortcuts();
 }
 
+void InnerWidget::updateFilteredEntryHeight(not_null<Entry*> entry) {
+	auto changing = false;
+	auto top = 0;
+	for (auto &result : _filterResults) {
+		if (changing) {
+			result.top = top;
+		}
+		if (result.row->key().entry() == entry) {
+			result.row->recountHeight();
+			changing = true;
+			top = result.top;
+		}
+		if (changing) {
+			top += result.row->height();
+		}
+	}
+}
+
 Main::Session &InnerWidget::session() const {
 	return _controller->session();
 }

Telegram/SourceFiles/dialogs/dialogs_inner_widget.h

@@ -230,6 +230,7 @@ private:
 	void repaintDialogRow(FilterId filterId, not_null<Row*> row);
 	void repaintDialogRow(RowDescriptor row);
 	void refreshDialogRow(RowDescriptor row);
+	void updateFilteredEntryHeight(not_null<Entry*> entry);
 
 	void clearMouseSelection(bool clearSelection = false);
 	void mousePressReleased(

Telegram/SourceFiles/dialogs/dialogs_list.cpp

@@ -103,6 +103,17 @@ void List::adjustByDate(not_null<Row*> row) {
 	}
 }
 
+void List::updateHeight(not_null<Row*> row) {
+	row->recountHeight();
+
+	const auto index = row->index();
+	auto top = row->top();
+	for (auto i = _rows.begin() + index, e = _rows.end(); i != e; ++i) {
+		(*i)->_top = top;
+		top += (*i)->height();
+	}
+}
+
 bool List::moveToTop(Key key) {
 	const auto i = _rowByKey.find(key);
 	if (i == _rowByKey.cend()) {

Telegram/SourceFiles/dialogs/dialogs_list.h

@@ -48,6 +48,7 @@ public:
 	not_null<Row*> addByName(Key key);
 	bool moveToTop(Key key);
 	void adjustByDate(not_null<Row*> row);
+	void updateHeight(not_null<Row*> row);
 	bool remove(Key key, Row *replacedBy = nullptr);
 
 	using const_iterator = std::vector<not_null<Row*>>::const_iterator;

Telegram/SourceFiles/dialogs/dialogs_main_list.cpp

@@ -107,6 +107,10 @@ void MainList::removeEntry(Key key) {
 	recomputeFullListSize();
 }
 
+void MainList::updateEntryHeight(const RowsByLetter &links) {
+	_all.updateHeight(links);
+}
+
 void MainList::recomputeFullListSize() {
 	_fullListSize = std::max(_all.size(), loaded() ? 0 : _cloudListSize);
 }

Telegram/SourceFiles/dialogs/dialogs_main_list.h

@@ -35,6 +35,7 @@ public:
 
 	RowsByLetter addEntry(Key key);
 	void removeEntry(Key key);
+	void updateEntryHeight(const RowsByLetter &links);
 
 	void unreadStateChanged(
 		const UnreadState &wasState,

Telegram/SourceFiles/dialogs/dialogs_row.cpp

@@ -100,10 +100,16 @@ void BasicRow::paintUserpic(
 Row::Row(Key key, int index, int top) : _id(key), _top(top), _index(index) {
 	if (const auto history = key.history()) {
 		updateCornerBadgeShown(history->peer);
+	}
+	recountHeight();
+}
+
+void Row::recountHeight() {
+	if (const auto history = _id.history()) {
 		_height = history->peer->isForum()
 			? st::forumDialogRow.height
 			: st::defaultDialogRow.height;
-	} else if (key.folder()) {
+	} else if (_id.folder()) {
 		_height = st::defaultDialogRow.height;
 	} else {
 		_height = st::forumTopicRow.height;

Telegram/SourceFiles/dialogs/dialogs_row.h

@@ -91,6 +91,7 @@ public:
 	[[nodiscard]] int height() const {
 		return _height;
 	}
+	void recountHeight();
 
 	void updateCornerBadgeShown(
 		not_null<PeerData*> peer,