Fix opening forums with tabs.

Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp

@@ -18,6 +18,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "dialogs/dialogs_search_tags.h"
 #include "dialogs/dialogs_quick_action.h"
 #include "history/view/history_view_context_menu.h"
+#include "history/view/history_view_subsection_tabs.h"
 #include "history/history.h"
 #include "history/history_item.h"
 #include "core/application.h"
@@ -1500,6 +1501,12 @@ bool InnerWidget::isRowActive(
 	const auto key = row->key();
 	if (entry.key == key) {
 		return true;
+	} else if (const auto topic = entry.key.topic()) {
+		if (const auto history = key.history()) {
+			return (history->peer == topic->channel())
+				&& HistoryView::SubsectionTabs::UsedFor(history);
+		}
+		return false;
 	} else if (const auto sublist = entry.key.sublist()) {
 		if (!sublist->parentChat()) {
 			// In case we're viewing a Saved Messages sublist,

Telegram/SourceFiles/history/history_widget.cpp

@@ -6466,7 +6466,9 @@ void HistoryWidget::updateControlsGeometry() {
 	const auto scrollAreaTop = _topBars->y()
 		+ businessBotTop
 		+ (_businessBotStatus ? _businessBotStatus->bar().height() : 0);
-	_topBars->resize(innerWidth, scrollAreaTop - _topBars->y());
+	_topBars->resize(
+		innerWidth,
+		scrollAreaTop - _topBars->y() + st::lineWidth);
 	if (_scroll->y() != scrollAreaTop) {
 		_scroll->moveToLeft(tabsLeftSkip, scrollAreaTop);
 		if (_autocomplete) {

Telegram/SourceFiles/history/view/history_view_chat_section.cpp

@@ -468,6 +468,7 @@ ChatWidget::~ChatWidget() {
 }
 
 void ChatWidget::orderWidgets() {
+	_topBars->raise();
 	_translateBar->raise();
 	if (_topicReopenBar) {
 		_topicReopenBar->bar().raise();
@@ -2608,7 +2609,7 @@ void ChatWidget::updateControlsGeometry() {
 		bottom -= _composeControls->heightCurrent();
 	}
 
-	_topBars->resize(innerWidth, top);
+	_topBars->resize(innerWidth, top + st::lineWidth);
 	top += _topBars->y();
 
 	const auto scrollHeight = bottom - top;

Telegram/SourceFiles/history/view/history_view_top_bar_widget.cpp

@@ -46,6 +46,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_group_call.h" // GroupCall::input.
 #include "data/data_folder.h"
 #include "data/data_forum.h"
+#include "data/data_saved_messages.h"
 #include "data/data_saved_sublist.h"
 #include "data/data_session.h"
 #include "data/data_stories.h"
@@ -55,6 +56,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_changes.h"
 #include "data/data_forum_topic.h"
 #include "data/data_send_action.h"
+#include "dialogs/dialogs_main_list.h"
 #include "chat_helpers/emoji_interactions.h"
 #include "base/unixtime.h"
 #include "support/support_helper.h"
@@ -488,14 +490,16 @@ void TopBarWidget::paintTopBar(Painter &p) {
 	const auto sublist = _activeChat.key.sublist();
 	const auto topic = _activeChat.key.topic();
 	const auto history = _activeChat.key.history();
-	const auto namePeer = history
+	const auto broadcastForMonoforum = history
+		? history->peer->monoforumBroadcast()
+		: nullptr;
+	const auto namePeer = broadcastForMonoforum
+		? broadcastForMonoforum
+		: history
 		? history->peer.get()
 		: sublist
 		? sublist->sublistPeer().get()
 		: nullptr;
-	const auto broadcastForMonoforum = history
-		? history->peer->monoforumBroadcast()
-		: nullptr;
 	if (topic && _activeChat.section == Section::Replies) {
 		p.setPen(st::dialogsNameFg);
 		topic->chatListNameText().drawElided(
@@ -519,12 +523,9 @@ void TopBarWidget::paintTopBar(Painter &p) {
 		}
 	} else if (folder
 		|| (peer && (peer->sharedMediaInfo() || peer->isVerifyCodes()))
-		|| broadcastForMonoforum
 		|| (_activeChat.section == Section::Scheduled)
 		|| (_activeChat.section == Section::Pinned)) {
-		auto text = broadcastForMonoforum
-			? broadcastForMonoforum->name() + u" Messages"_q AssertIsDebug()
-			: (_activeChat.section == Section::Scheduled)
+		auto text = (_activeChat.section == Section::Scheduled)
 			? ((peer && peer->isSelf())
 				? tr::lng_reminder_messages(tr::now)
 				: tr::lng_scheduled_messages(tr::now))
@@ -1690,6 +1691,10 @@ void TopBarWidget::updateOnlineDisplay() {
 				text = tr::lng_group_status(tr::now);
 			}
 		}
+	} else if (const auto monoforum = peer->monoforum()) {
+		const auto chats = monoforum->chatsList();
+		const auto count = chats->fullSize().current();
+		text = tr::lng_filters_chats_count(tr::now, lt_count, count);
 	} else if (const auto channel = peer->asChannel()) {
 		if (channel->isMegagroup()
 			&& channel->canViewMembers()

Telegram/SourceFiles/history/view/history_view_translate_bar.cpp

@@ -232,7 +232,7 @@ TranslateBar::TranslateBar(
 : _controller(controller)
 , _history(history)
 , _wrap(parent, object_ptr<Ui::AbstractButton>(parent))
-, _shadow(std::make_unique<Ui::PlainShadow>(_wrap.parentWidget())) {
+, _shadow(std::make_unique<Ui::PlainShadow>(parent)) {
 	_wrap.hide(anim::type::instant);
 	_shadow->hide();
 

Telegram/SourceFiles/window/window_session_controller.cpp

@@ -1878,6 +1878,10 @@ void SessionController::showForum(
 		const SectionShow &params) {
 	if (showForumInDifferentWindow(forum, params)) {
 		return;
+	} else if (HistoryView::SubsectionTabs::UsedFor(
+			forum->owner().history(forum->channel()))) {
+		showPeerHistory(forum->channel(), params);
+		return;
 	}
 	_shownForumLifetime.destroy();
 	if (_shownForum.current() != forum) {