Support search in feed + scroll to search result.

Telegram/Resources/langs/lang.strings

@@ -1044,6 +1044,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_context_view_profile" = "View profile";
 "lng_context_view_group" = "View group info";
 "lng_context_view_channel" = "View channel info";
+"lng_context_view_feed_info" = "View feed info";
 "lng_context_pin_to_top" = "Pin to top";
 "lng_context_unpin_from_top" = "Unpin from top";
 

Telegram/SourceFiles/data/data_messages.h

@@ -76,19 +76,20 @@ struct MessagesRange {
 
 };
 
+constexpr auto MinDate = TimeId(0);
 constexpr auto MaxDate = std::numeric_limits<TimeId>::max();
 constexpr auto MinMessagePosition = MessagePosition(
-	TimeId(0),
-	FullMsgId(0, 1));
+	MinDate,
+	FullMsgId(NoChannel, 1));
 constexpr auto MaxMessagePosition = MessagePosition(
 	MaxDate,
-	FullMsgId(0, ServerMaxMsgId - 1));
+	FullMsgId(NoChannel, ServerMaxMsgId - 1));
 constexpr auto FullMessagesRange = MessagesRange(
 	MinMessagePosition,
 	MaxMessagePosition);
 constexpr auto UnreadMessagePosition = MessagePosition(
-	TimeId(0),
-	FullMsgId(0, 0));;
+	MinDate,
+	FullMsgId(NoChannel, ShowAtUnreadMsgId));
 
 struct MessagesSlice {
 	std::vector<FullMsgId> ids;

Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp

@@ -109,7 +109,7 @@ DialogsInner::DialogsInner(QWidget *parent, not_null<Window::Controller*> contro
 	subscribe(App::histories().sendActionAnimationUpdated(), [this](const Histories::SendActionAnimationUpdate &update) {
 		auto updateRect = Dialogs::Layout::RowPainter::sendActionAnimationRect(update.width, update.height, getFullWidth(), update.textUpdated);
 		updateDialogRow(
-			Dialogs::RowDescriptor(update.history, MsgId(0)),
+			Dialogs::RowDescriptor(update.history, FullMsgId()),
 			updateRect,
 			UpdateRowSection::Default | UpdateRowSection::Filtered);
 	});
@@ -145,7 +145,7 @@ DialogsInner::DialogsInner(QWidget *parent, not_null<Window::Controller*> contro
 	Auth().data().feedUpdated(
 	) | rpl::start_with_next([=](const Data::FeedUpdate &update) {
 		updateDialogRow(
-			Dialogs::RowDescriptor(update.feed, MsgId(0)),
+			Dialogs::RowDescriptor(update.feed, FullMsgId()),
 			QRect(0, 0, getFullWidth(), st::dialogsRowHeight));
 	}, lifetime());
 
@@ -340,7 +340,7 @@ void DialogsInner::paintRegion(Painter &p, const QRegion &region, bool paintingO
 					const auto row = _filterResults[from];
 					const auto key = row->key();
 					const auto active = (activeEntry.key == key)
-						&& !activeEntry.msgId;
+						&& !activeEntry.fullId;
 					const auto selected = _menuKey
 						? (key == _menuKey)
 						: (from == (isPressed()
@@ -377,7 +377,7 @@ void DialogsInner::paintRegion(Painter &p, const QRegion &region, bool paintingO
 				for (; from < to; ++from) {
 					const auto &result = _peerSearchResults[from];
 					const auto peer = result->peer;
-					const auto active = !activeEntry.msgId
+					const auto active = !activeEntry.fullId
 						&& activePeer
 						&& ((peer == activePeer)
 							|| (peer->migrateTo() == activePeer));
@@ -437,11 +437,10 @@ void DialogsInner::paintRegion(Painter &p, const QRegion &region, bool paintingO
 					const auto &result = _searchResults[from];
 					const auto item = result->item();
 					const auto peer = item->history()->peer;
-					const auto active = (peer == activePeer
-							&& item->id == activeEntry.msgId)
+					const auto active = (item->fullId() == activeEntry.fullId)
 						|| (peer->migrateTo()
-							&& peer->migrateTo() == activePeer
-							&& item->id == -activeEntry.msgId);
+							&& (peer->migrateTo()->bareId() == activeEntry.fullId.channel)
+							&& (item->id == -activeEntry.fullId.msg));
 					const auto selected = (from == (isPressed()
 						? _searchedPressed
 						: _searchedSelected));
@@ -1302,7 +1301,9 @@ void DialogsInner::repaintDialogRow(
 		not_null<History*> history,
 		MsgId messageId) {
 	updateDialogRow(
-		Dialogs::RowDescriptor(history, messageId),
+		Dialogs::RowDescriptor(
+			history,
+			FullMsgId(history->channelId(), messageId)),
 		QRect(0, 0, getFullWidth(), st::dialogsRowHeight));
 }
 
@@ -1325,11 +1326,13 @@ void DialogsInner::updateDialogRow(
 		Dialogs::RowDescriptor row,
 		QRect updateRect,
 		UpdateRowSections sections) {
-	if (IsServerMsgId(-row.msgId)) {
+	if (IsServerMsgId(-row.fullId.msg)) {
 		if (const auto peer = row.key.peer()) {
 			if (const auto from = peer->migrateFrom()) {
 				if (const auto migrated = App::historyLoaded(from)) {
-					row = Dialogs::RowDescriptor(migrated, -row.msgId);
+					row = Dialogs::RowDescriptor(
+						migrated,
+						FullMsgId(0, -row.fullId.msg));
 				}
 			}
 		}
@@ -1382,18 +1385,15 @@ void DialogsInner::updateDialogRow(
 		}
 		if ((sections & UpdateRowSection::MessageSearch)
 			&& !_searchResults.empty()) {
-			if (const auto history = row.key.history()) {
-				const auto add = searchedOffset();
-				auto index = 0;
-				for (const auto &result : _searchResults) {
-					auto item = result->item();
-					if (item->history() == history
-						&& item->id == row.msgId) {
-						updateRow(add + index * st::dialogsRowHeight);
-						break;
-					}
-					++index;
+			const auto add = searchedOffset();
+			auto index = 0;
+			for (const auto &result : _searchResults) {
+				auto item = result->item();
+				if (item->fullId() == row.fullId) {
+					updateRow(add + index * st::dialogsRowHeight);
+					break;
 				}
+				++index;
 			}
 		}
 	}
@@ -2402,25 +2402,33 @@ DialogsInner::ChosenRow DialogsInner::computeChosenRow() const {
 		if (_selected) {
 			return {
 				_selected->key(),
-				ShowAtUnreadMsgId
+				Data::UnreadMessagePosition
 			};
 		}
 	} else if (_state == State::Filtered) {
 		if (base::in_range(_filteredSelected, 0, _filterResults.size())) {
 			return {
 				_filterResults[_filteredSelected]->key(),
-				ShowAtUnreadMsgId
+				Data::UnreadMessagePosition
 			};
 		} else if (base::in_range(_peerSearchSelected, 0, _peerSearchResults.size())) {
 			return {
 				App::history(_peerSearchResults[_peerSearchSelected]->peer),
-				ShowAtUnreadMsgId
+				Data::UnreadMessagePosition
 			};
 		} else if (base::in_range(_searchedSelected, 0, _searchResults.size())) {
-			return {
-				_searchResults[_searchedSelected]->item()->history(),
-				_searchResults[_searchedSelected]->item()->id
-			};
+			const auto result = _searchResults[_searchedSelected].get();
+			if (const auto feed = result->searchInChat().feed()) {
+				return {
+					feed,
+					result->item()->position()
+				};
+			} else {
+				return {
+					result->item()->history(),
+					result->item()->position()
+				};
+			}
 		}
 	}
 	return ChosenRow();
@@ -2434,17 +2442,19 @@ bool DialogsInner::chooseRow() {
 	}
 	const auto chosen = computeChosenRow();
 	if (chosen.key) {
-		if (chosen.messageId > 0) {
+		if (IsServerMsgId(chosen.message.fullId.msg)) {
 			saveRecentHashtags(_filter);
 		}
 		const auto openSearchResult = !App::main()->selectingPeer(true)
 			&& (_state == State::Filtered)
 			&& base::in_range(_filteredSelected, 0, _filterResults.size());
 		if (const auto history = chosen.key.history()) {
-			App::main()->choosePeer(history->peer->id, chosen.messageId);
+			App::main()->choosePeer(
+				history->peer->id,
+				chosen.message.fullId.msg);
 		} else if (const auto feed = chosen.key.feed()) {
 			_controller->showSection(
-				HistoryFeed::Memento(feed),
+				HistoryFeed::Memento(feed, chosen.message),
 				Window::SectionShow::Way::ClearStack);
 		}
 		if (openSearchResult) {
@@ -2518,57 +2528,57 @@ Dialogs::RowDescriptor DialogsInner::chatListEntryBefore(
 		if (const auto row = shownDialogs()->getRow(which.key)) {
 			const auto i = shownDialogs()->cfind(row);
 			if (i != shownDialogs()->cbegin()) {
-				return Dialogs::RowDescriptor((*(i - 1))->key(),
-					ShowAtUnreadMsgId);
+				return Dialogs::RowDescriptor(
+					(*(i - 1))->key(),
+					FullMsgId(NoChannel, ShowAtUnreadMsgId));
 			}
 		}
 		return Dialogs::RowDescriptor();
 	}
 
 	const auto whichHistory = which.key.history();
-	const auto whichMsgId = which.msgId;
+	const auto whichFullId = which.fullId;
 	if (!whichHistory) {
 		return Dialogs::RowDescriptor();
 	}
-	if (whichMsgId && !_searchResults.empty()) {
+	if (whichFullId && !_searchResults.empty()) {
 		for (auto b = _searchResults.cbegin(), i = b + 1, e = _searchResults.cend(); i != e; ++i) {
-			if ((*i)->item()->history() == whichHistory
-				&& (*i)->item()->id == whichMsgId) {
+			if ((*i)->item()->fullId() == whichFullId) {
 				const auto j = i - 1;
 				return Dialogs::RowDescriptor(
 					(*j)->item()->history(),
-					(*j)->item()->id);
+					(*j)->item()->fullId());
 			}
 		}
-		if (_searchResults[0]->item()->history() == whichHistory
-			&& _searchResults[0]->item()->id == whichMsgId) {
+		if (_searchResults[0]->item()->fullId() == whichFullId) {
 			if (_peerSearchResults.empty()) {
 				if (_filterResults.isEmpty()) {
 					return Dialogs::RowDescriptor();
 				}
 				return Dialogs::RowDescriptor(
 					_filterResults.back()->key(),
-					ShowAtUnreadMsgId);
+					FullMsgId(NoChannel, ShowAtUnreadMsgId));
 			}
 			return Dialogs::RowDescriptor(
 				App::history(_peerSearchResults.back()->peer),
-				ShowAtUnreadMsgId);
+				FullMsgId(NoChannel, ShowAtUnreadMsgId));
 		}
 	}
-	if (!_peerSearchResults.empty() && _peerSearchResults[0]->peer == whichHistory->peer) {
+	if (!_peerSearchResults.empty()
+		&& _peerSearchResults[0]->peer == whichHistory->peer) {
 		if (_filterResults.isEmpty()) {
 			return Dialogs::RowDescriptor();
 		}
 		return Dialogs::RowDescriptor(
 			_filterResults.back()->key(),
-			ShowAtUnreadMsgId);
+			FullMsgId(NoChannel, ShowAtUnreadMsgId));
 	}
 	if (!_peerSearchResults.empty()) {
 		for (auto b = _peerSearchResults.cbegin(), i = b + 1, e = _peerSearchResults.cend(); i != e; ++i) {
 			if ((*i)->peer == whichHistory->peer) {
 				return Dialogs::RowDescriptor(
 					App::history((*(i - 1))->peer),
-					ShowAtUnreadMsgId);
+					FullMsgId(NoChannel, ShowAtUnreadMsgId));
 			}
 		}
 	}
@@ -2580,7 +2590,7 @@ Dialogs::RowDescriptor DialogsInner::chatListEntryBefore(
 		if ((*i)->key() == which.key) {
 			return Dialogs::RowDescriptor(
 				(*(i - 1))->key(),
-				ShowAtUnreadMsgId);
+				FullMsgId(NoChannel, ShowAtUnreadMsgId));
 		}
 	}
 	return Dialogs::RowDescriptor();
@@ -2597,25 +2607,24 @@ Dialogs::RowDescriptor DialogsInner::chatListEntryAfter(
 			if (i != shownDialogs()->cend()) {
 				return Dialogs::RowDescriptor(
 					(*i)->key(),
-					ShowAtUnreadMsgId);
+					FullMsgId(NoChannel, ShowAtUnreadMsgId));
 			}
 		}
 		return Dialogs::RowDescriptor();
 	}
 
 	const auto whichHistory = which.key.history();
-	const auto whichMsgId = which.msgId;
+	const auto whichFullId = which.fullId;
 	if (!whichHistory) {
 		return Dialogs::RowDescriptor();
 	}
-	if (whichMsgId) {
+	if (whichFullId) {
 		for (auto i = _searchResults.cbegin(), e = _searchResults.cend(); i != e; ++i) {
-			if ((*i)->item()->history() == whichHistory
-				&& (*i)->item()->id == whichMsgId) {
+			if ((*i)->item()->fullId() == whichFullId) {
 				if (++i != e) {
 					return Dialogs::RowDescriptor(
 						(*i)->item()->history(),
-						(*i)->item()->id);
+						(*i)->item()->fullId());
 				}
 				return Dialogs::RowDescriptor();
 			}
@@ -2627,11 +2636,11 @@ Dialogs::RowDescriptor DialogsInner::chatListEntryAfter(
 			if (i != e) {
 				return Dialogs::RowDescriptor(
 					App::history((*i)->peer),
-					ShowAtUnreadMsgId);
+					FullMsgId(NoChannel, ShowAtUnreadMsgId));
 			} else if (!_searchResults.empty()) {
 				return Dialogs::RowDescriptor(
 					_searchResults.front()->item()->history(),
-					_searchResults.front()->item()->id);
+					_searchResults.front()->item()->fullId());
 			}
 			return Dialogs::RowDescriptor();
 		}
@@ -2642,15 +2651,15 @@ Dialogs::RowDescriptor DialogsInner::chatListEntryAfter(
 			if (i != e) {
 				return Dialogs::RowDescriptor(
 					(*i)->key(),
-					ShowAtUnreadMsgId);
+					FullMsgId(NoChannel, ShowAtUnreadMsgId));
 			} else if (!_peerSearchResults.empty()) {
 				return Dialogs::RowDescriptor(
 					App::history(_peerSearchResults.front()->peer),
-					ShowAtUnreadMsgId);
+					FullMsgId(NoChannel, ShowAtUnreadMsgId));
 			} else if (!_searchResults.empty()) {
 				return Dialogs::RowDescriptor(
 					_searchResults.front()->item()->history(),
-					_searchResults.front()->item()->id);
+					_searchResults.front()->item()->fullId());
 			}
 			return Dialogs::RowDescriptor();
 		}

Telegram/SourceFiles/dialogs/dialogs_inner_widget.h

@@ -9,6 +9,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "dialogs/dialogs_widget.h"
 #include "dialogs/dialogs_key.h"
+#include "data/data_messages.h"
 #include "base/flags.h"
 
 namespace Dialogs {
@@ -151,7 +152,7 @@ private:
 
 	struct ChosenRow {
 		Dialogs::Key key;
-		MsgId messageId = 0;
+		Data::MessagePosition message;
 	};
 	bool switchImportantChats();
 	bool chooseHashtag();

Telegram/SourceFiles/dialogs/dialogs_key.h

@@ -76,16 +76,16 @@ private:
 
 struct RowDescriptor {
 	RowDescriptor() = default;
-	RowDescriptor(Key key, MsgId msgId) : key(key), msgId(msgId) {
+	RowDescriptor(Key key, FullMsgId fullId) : key(key), fullId(fullId) {
 	}
 
 	Key key;
-	MsgId msgId = 0;
+	FullMsgId fullId;
 
 };
 
 inline bool operator==(const RowDescriptor &a, const RowDescriptor &b) {
-	return (a.key == b.key) && (a.msgId == b.msgId);
+	return (a.key == b.key) && (a.fullId == b.fullId);
 }
 
 inline bool operator!=(const RowDescriptor &a, const RowDescriptor &b) {
@@ -98,7 +98,7 @@ inline bool operator<(const RowDescriptor &a, const RowDescriptor &b) {
 	} else if (a.key > b.key) {
 		return false;
 	}
-	return a.msgId < b.msgId;
+	return a.fullId < b.fullId;
 }
 
 inline bool operator>(const RowDescriptor &a, const RowDescriptor &b) {

Telegram/SourceFiles/history/admin_log/history_admin_log_section.cpp

@@ -280,7 +280,10 @@ not_null<ChannelData*> Widget::channel() const {
 }
 
 Dialogs::RowDescriptor Widget::activeChat() const {
-	return { App::history(channel()), MsgId(0) };
+	return {
+		App::history(channel()),
+		FullMsgId(channel()->bareId(), ShowAtUnreadMsgId)
+	};
 }
 
 QPixmap Widget::grabForShowAnimation(const Window::SectionSlideParams &params) {

Telegram/SourceFiles/history/feed/history_feed_section.cpp

@@ -40,9 +40,10 @@ namespace HistoryFeed {
 
 Memento::Memento(
 	not_null<Data::Feed*> feed,
-	Data::MessagePosition aroundPosition)
+	Data::MessagePosition position)
 : _feed(feed)
-, _list(std::make_unique<HistoryView::ListMemento>(aroundPosition)) {
+, _position(position)
+, _list(std::make_unique<HistoryView::ListMemento>(position)) {
 }
 
 Memento::~Memento() = default;
@@ -153,6 +154,7 @@ void Widget::setupScrollDownButton() {
 }
 
 void Widget::scrollDownClicked() {
+	_currentMessageId = Data::MaxMessagePosition.fullId;
 	showAtPosition(Data::MaxMessagePosition);
 }
 
@@ -246,7 +248,7 @@ void Widget::checkForSingleChannelFeed() {
 }
 
 Dialogs::RowDescriptor Widget::activeChat() const {
-	return Dialogs::RowDescriptor(_feed, MsgId(0));
+	return Dialogs::RowDescriptor(_feed, _currentMessageId);
 }
 
 void Widget::updateAdaptiveLayout() {
@@ -444,6 +446,10 @@ void Widget::restoreState(not_null<Memento*> memento) {
 	}
 	_undefinedAroundPosition = !list->aroundPosition();
 	_inner->restoreState(memento->list());
+	if (const auto position = memento->position()) {
+		_currentMessageId = position.fullId;
+		showAtPosition(position);
+	}
 }
 
 void Widget::resizeEvent(QResizeEvent *e) {

Telegram/SourceFiles/history/feed/history_feed_section.h

@@ -128,6 +128,7 @@ private:
 	std::unique_ptr<HistoryItem, HistoryItem::Destroyer> _emptyTextItem;
 	std::unique_ptr<HistoryView::Element> _emptyTextView;
 
+	FullMsgId _currentMessageId;
 	base::optional<Data::MessagePosition> _nextAnimatedScrollPosition;
 	int _nextAnimatedScrollDelta = 0;
 
@@ -142,7 +143,7 @@ class Memento : public Window::SectionMemento {
 public:
 	explicit Memento(
 		not_null<Data::Feed*> feed,
-		Data::MessagePosition aroundPosition = Data::UnreadMessagePosition);
+		Data::MessagePosition position = Data::UnreadMessagePosition);
 	~Memento();
 
 	object_ptr<Window::SectionWidget> createWidget(
@@ -154,12 +155,16 @@ public:
 	not_null<Data::Feed*> feed() const {
 		return _feed;
 	}
+	Data::MessagePosition position() const {
+		return _position;
+	}
 	not_null<HistoryView::ListMemento*> list() const {
 		return _list.get();
 	}
 
 private:
 	not_null<Data::Feed*> _feed;
+	Data::MessagePosition _position;
 	std::unique_ptr<HistoryView::ListMemento> _list;
 
 };

Telegram/SourceFiles/history/history_widget.cpp

@@ -31,6 +31,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/history_drag_area.h"
 #include "history/history_inner_widget.h"
 #include "history/history_item_components.h"
+#include "history/feed/history_feed_section.h"
 #include "history/view/history_view_service_message.h"
 #include "history/view/history_view_element.h"
 #include "profile/profile_block_group_members.h"
@@ -1441,12 +1442,19 @@ bool HistoryWidget::cmd_next_chat() {
 		return false;
 	}
 	const auto next = App::main()->chatListEntryAfter(
-		Dialogs::RowDescriptor(_history, std::max(_showAtMsgId, 0)));
+		Dialogs::RowDescriptor(
+			_history,
+			FullMsgId(_history->channelId(), std::max(_showAtMsgId, 0))));
 	if (const auto history = next.key.history()) {
-		Ui::showPeerHistory(history, next.msgId);
+		Ui::showPeerHistory(history, next.fullId.msg);
 		return true;
+	} else if (const auto feed = next.key.feed()) {
+		if (const auto item = App::histItemById(next.fullId)) {
+			controller()->showSection(HistoryFeed::Memento(feed, item->position()));
+		} else {
+			controller()->showSection(HistoryFeed::Memento(feed));
+		}
 	}
-	// #TODO feeds show
 	return false;
 }
 
@@ -1455,12 +1463,19 @@ bool HistoryWidget::cmd_previous_chat() {
 		return false;
 	}
 	const auto next = App::main()->chatListEntryBefore(
-		Dialogs::RowDescriptor(_history, std::max(_showAtMsgId, 0)));
+		Dialogs::RowDescriptor(
+			_history,
+			FullMsgId(_history->channelId(), std::max(_showAtMsgId, 0))));
 	if (const auto history = next.key.history()) {
-		Ui::showPeerHistory(history, next.msgId);
+		Ui::showPeerHistory(history, next.fullId.msg);
 		return true;
+	} else if (const auto feed = next.key.feed()) {
+		if (const auto item = App::histItemById(next.fullId)) {
+			controller()->showSection(HistoryFeed::Memento(feed, item->position()));
+		} else {
+			controller()->showSection(HistoryFeed::Memento(feed));
+		}
 	}
-	// #TODO feeds show
 	return false;
 }
 
@@ -1840,7 +1855,9 @@ void HistoryWidget::showHistory(const PeerId &peerId, MsgId showAtMsgId, bool re
 	updateOverStates(mapFromGlobal(QCursor::pos()));
 
 	if (_history) {
-		controller()->setActiveChatEntry({ _history, _showAtMsgId });
+		controller()->setActiveChatEntry({
+			_history,
+			FullMsgId(_history->channelId(), _showAtMsgId) });
 	}
 	update();
 
@@ -3046,7 +3063,9 @@ void HistoryWidget::setMsgId(MsgId showAtMsgId) {
 		auto wasMsgId = _showAtMsgId;
 		_showAtMsgId = showAtMsgId;
 		if (_history) {
-			controller()->setActiveChatEntry({ _history, _showAtMsgId });
+			controller()->setActiveChatEntry({
+				_history,
+				FullMsgId(_history->channelId(), _showAtMsgId) });
 		}
 	}
 }

Telegram/SourceFiles/history/view/history_view_list_widget.cpp

@@ -334,9 +334,31 @@ base::optional<int> ListWidget::scrollTopForPosition(
 			return height();
 		}
 		return base::none;
+	} else if (_items.empty()
+		|| isBelowPosition(position)
+		|| isAbovePosition(position)) {
+		return base::none;
 	}
-	// #TODO showAtPosition
-	return base::none;
+	const auto index = findNearestItem(position);
+	const auto view = _items[index];
+	return scrollTopForView(_items[index]);
+}
+
+base::optional<int> ListWidget::scrollTopForView(
+		not_null<Element*> view) const {
+	if (view->isHiddenByGroup()) {
+		if (const auto group = Auth().data().groups().find(view->data())) {
+			if (const auto leader = viewForItem(group->items.back())) {
+				if (!leader->isHiddenByGroup()) {
+					return scrollTopForView(leader);
+				}
+			}
+		}
+	}
+	const auto top = view->y();
+	const auto height = view->height();
+	const auto available = _visibleBottom - _visibleTop;
+	return top - std::max((available - height) / 2, 0);
 }
 
 void ListWidget::animatedScrollTo(
@@ -382,14 +404,14 @@ void ListWidget::scrollToAnimationCallback(FullMsgId attachToId) {
 }
 
 bool ListWidget::isAbovePosition(Data::MessagePosition position) const {
-	if (_items.empty()) {
+	if (_items.empty() || loadedAtBottom()) {
 		return false;
 	}
 	return _items.back()->data()->position() < position;
 }
 
 bool ListWidget::isBelowPosition(Data::MessagePosition position) const {
-	if (_items.empty()) {
+	if (_items.empty() || loadedAtTop()) {
 		return false;
 	}
 	return _items.front()->data()->position() > position;

Telegram/SourceFiles/history/view/history_view_list_widget.h

@@ -137,6 +137,7 @@ public:
 	void restoreState(not_null<ListMemento*> memento);
 	base::optional<int> scrollTopForPosition(
 		Data::MessagePosition position) const;
+	base::optional<int> scrollTopForView(not_null<Element*> view) const;
 	enum class AnimatedScroll {
 		Full,
 		Part,

Telegram/SourceFiles/info/feed/info_feed_channels_controllers.cpp

@@ -16,6 +16,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/widgets/popup_menu.h"
 #include "auth_session.h"
 #include "mainwidget.h"
+#include "apiwrap.h"
 #include "styles/style_widgets.h"
 #include "styles/style_info.h"
 #include "styles/style_boxes.h"
@@ -88,6 +89,9 @@ ChannelsController::ChannelsController(not_null<Controller*> controller)
 : PeerListController()
 , _controller(controller)
 , _feed(_controller->key().feed()) {
+	if (!_feed->channelsLoaded()) {
+		Auth().api().requestFeedChannels(_feed);
+	}
 	_controller->setSearchEnabledByContent(false);
 }
 

Telegram/SourceFiles/info/info_wrap_widget.cpp

@@ -199,9 +199,9 @@ Key WrapWidget::key() const {
 
 Dialogs::RowDescriptor WrapWidget::activeChat() const {
 	if (const auto peer = key().peer()) {
-		return Dialogs::RowDescriptor(App::history(peer), MsgId(0));
+		return Dialogs::RowDescriptor(App::history(peer), FullMsgId());
 	} else if (const auto feed = key().feed()) {
-		return Dialogs::RowDescriptor(feed, MsgId(0));
+		return Dialogs::RowDescriptor(feed, FullMsgId());
 	}
 	Unexpected("Owner in WrapWidget::activeChat().");
 }
@@ -497,18 +497,27 @@ void WrapWidget::showProfileMenu() {
 	});
 	_topBarMenuToggle->installEventFilter(_topBarMenu.get());
 
-	// #TODO feeds menu
-	const auto peer = key().peer();
-	if (!peer) {
+	const auto addAction = [=](
+			const QString &text,
+			base::lambda<void()> callback) {
+		return _topBarMenu->addAction(text, std::move(callback));
+	};
+	if (const auto peer = key().peer()) {
+		Window::FillPeerMenu(
+			_controller->parentController(),
+			peer,
+			addAction,
+			Window::PeerMenuSource::Profile);
+	} else if (const auto feed = key().feed()) {
+		Window::FillFeedMenu(
+			_controller->parentController(),
+			feed,
+			addAction,
+			Window::PeerMenuSource::Profile);
+	} else {
+		_topBarMenu = nullptr;
 		return;
 	}
-	Window::FillPeerMenu(
-		_controller->parentController(),
-		peer,
-		[this](const QString &text, base::lambda<void()> callback) {
-			return _topBarMenu->addAction(text, std::move(callback));
-		},
-		Window::PeerMenuSource::Profile);
 	auto position = (wrap() == Wrap::Layer)
 		? st::infoLayerTopBarMenuPosition
 		: st::infoTopBarMenuPosition;

Telegram/SourceFiles/mainwidget.cpp

@@ -2184,6 +2184,9 @@ void MainWidget::showSection(
 	if (_mainSection && _mainSection->showInternal(
 			&memento,
 			params)) {
+		if (const auto entry = _mainSection->activeChat(); entry.key) {
+			_controller->setActiveChatEntry(entry);
+		}
 		return;
 	//
 	// Now third section handles only its own showSection() requests.

Telegram/SourceFiles/window/window_controller.cpp

@@ -41,7 +41,7 @@ void Controller::setActiveChatEntry(Dialogs::RowDescriptor row) {
 }
 
 void Controller::setActiveChatEntry(Dialogs::Key key) {
-	setActiveChatEntry({ key, MsgId(0) });
+	setActiveChatEntry({ key, FullMsgId() });
 }
 
 Dialogs::RowDescriptor Controller::activeChatEntryCurrent() const {

Telegram/SourceFiles/window/window_peer_menu.cpp

@@ -25,6 +25,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "styles/style_boxes.h"
 #include "history/history.h"
 #include "window/window_controller.h"
+#include "info/info_memento.h"
+#include "info/info_controller.h"
 #include "info/feed/info_feed_channels_controllers.h"
 #include "data/data_session.h"
 #include "data/data_feed.h"
@@ -69,7 +71,10 @@ public:
 	void fill();
 
 private:
+	bool showInfo();
 	void addPinToggle();
+	void addInfo();
+	void addSearch();
 	void addNotifications();
 
 	not_null<Controller*> _controller;
@@ -411,7 +416,28 @@ void FeedFiller::fill() {
 	if (_source == PeerMenuSource::ChatsList) {
 		addPinToggle();
 	}
+	if (showInfo()) {
+		addInfo();
+	}
 	addNotifications();
+	if (_source == PeerMenuSource::ChatsList) {
+		addSearch();
+	}
+}
+
+bool FeedFiller::showInfo() {
+	if (_source == PeerMenuSource::Profile) {
+		return false;
+	} else if (_controller->activeChatCurrent().feed() != _feed) {
+		return true;
+	} else if (!Adaptive::ThreeColumn()) {
+		return true;
+	} else if (
+		!Auth().settings().thirdSectionInfoEnabled() &&
+		!Auth().settings().tabbedReplacedWithInfo()) {
+		return true;
+	}
+	return false;
 }
 
 void FeedFiller::addPinToggle() {
@@ -427,6 +453,16 @@ void FeedFiller::addPinToggle() {
 	});
 }
 
+void FeedFiller::addInfo() {
+	auto controller = _controller;
+	auto feed = _feed;
+	_addAction(lang(lng_context_view_feed_info), [=] {
+		controller->showSection(Info::Memento(
+			feed,
+			Info::Section(Info::Section::Type::Profile)));
+	});
+}
+
 void FeedFiller::addNotifications() {
 	const auto feed = _feed;
 	_addAction(lang(lng_feed_notifications), [=] {
@@ -434,6 +470,13 @@ void FeedFiller::addNotifications() {
 	});
 }
 
+void FeedFiller::addSearch() {
+	const auto feed = _feed;
+	_addAction(lang(lng_profile_search_messages), [=] {
+		App::main()->searchInChat(feed);
+	});
+}
+
 } // namespace
 
 void PeerMenuDeleteContact(not_null<UserData*> user) {