Add initial scheduled list implementation.

Telegram/SourceFiles/data/data_scheduled_messages.cpp

@@ -77,7 +77,7 @@ ScheduledMessages::~ScheduledMessages() {
 	}
 }
 
-MsgId ScheduledMessages::scheduledId(not_null<HistoryItem*> item) {
+MsgId ScheduledMessages::lookupId(not_null<HistoryItem*> item) const {
 	if (const auto i = _data.find(item->history()); i != end(_data)) {
 		const auto &list = i->second.idByItem;
 		if (const auto j = list.find(item); j != end(list)) {
@@ -87,16 +87,9 @@ MsgId ScheduledMessages::scheduledId(not_null<HistoryItem*> item) {
 	return MsgId(0);
 }
 
-HistoryItem *ScheduledMessages::scheduledMessage(
+int ScheduledMessages::count(not_null<History*> history) const {
-		not_null<History*> history,
+	const auto i = _data.find(history);
-		MsgId id) {
+	return (i != end(_data)) ? i->second.items.size() : 0;
-	if (const auto i = _data.find(history); i != end(_data)) {
-		const auto &list = i->second.itemById;
-		if (const auto j = list.find(id); j != end(list)) {
-			return j->second;
-		}
-	}
-	return nullptr;
 }
 
 void ScheduledMessages::apply(const MTPDupdateNewScheduledMessage &update) {
@@ -152,6 +145,28 @@ rpl::producer<> ScheduledMessages::updates(not_null<History*> history) {
 	});
 }
 
+Data::MessagesSlice ScheduledMessages::list(not_null<History*> history) {
+	auto result = Data::MessagesSlice();
+	const auto i = _data.find(history);
+	if (i == end(_data)) {
+		const auto i = _requests.find(history);
+		if (i == end(_requests)) {
+			return result;
+		}
+		result.fullCount = result.skippedAfter = result.skippedBefore = 0;
+		return result;
+	}
+	const auto &list = i->second.items;
+	result.skippedAfter = result.skippedBefore = 0;
+	result.fullCount = int(list.size());
+	result.ids = ranges::view::all(
+		list
+	) | ranges::view::transform(
+		&HistoryItem::fullId
+	) | ranges::view::reverse | ranges::to_vector;
+	return result;
+}
+
 void ScheduledMessages::request(not_null<History*> history) {
 	auto &request = _requests[history];
 	if (request.requestId) {

Telegram/SourceFiles/data/data_scheduled_messages.h

@@ -18,6 +18,7 @@ class Session;
 namespace Data {
 
 class Session;
+struct MessagesSlice;
 
 class ScheduledMessages final {
 public:
@@ -26,15 +27,14 @@ public:
 	ScheduledMessages &operator=(const ScheduledMessages &other) = delete;
 	~ScheduledMessages();
 
-	[[nodiscard]] MsgId scheduledId(not_null<HistoryItem*> item);
+	[[nodiscard]] MsgId lookupId(not_null<HistoryItem*> item) const;
-	[[nodiscard]] HistoryItem *scheduledMessage(
+	[[nodiscard]] int count(not_null<History*> history) const;
-		not_null<History*> history,
-		MsgId id);
 
 	void apply(const MTPDupdateNewScheduledMessage &update);
 	void apply(const MTPDupdateDeleteScheduledMessages &update);
 
 	[[nodiscard]] rpl::producer<> updates(not_null<History*> history);
+	[[nodiscard]] Data::MessagesSlice list(not_null<History*> history);
 
 private:
 	using OwnedItem = std::unique_ptr<HistoryItem, HistoryItem::Destroyer>;

Telegram/SourceFiles/data/data_session.cpp

@@ -45,6 +45,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_web_page.h"
 #include "data/data_game.h"
 #include "data/data_poll.h"
+#include "data/data_scheduled_messages.h"
 #include "base/unixtime.h"
 #include "styles/style_boxes.h" // st::backgroundSize
 
@@ -207,7 +208,7 @@ Session::Session(not_null<Main::Session*> session)
 })
 , _unmuteByFinishedTimer([=] { unmuteByFinished(); })
 , _groups(this)
-, _scheduledMessages(this) {
+, _scheduledMessages(std::make_unique<ScheduledMessages>(this)) {
 	_cache->open(Local::cacheKey());
 	_bigFileCache->open(Local::cacheBigFileKey());
 
@@ -231,6 +232,7 @@ void Session::clear() {
 	for (const auto &[peerId, history] : _histories) {
 		history->clear(History::ClearType::Unload);
 	}
+	_scheduledMessages = nullptr;
 	_dependentMessages.clear();
 	base::take(_messages);
 	base::take(_channelMessages);

Telegram/SourceFiles/data/data_session.h

@@ -14,7 +14,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "dialogs/dialogs_main_list.h"
 #include "data/data_groups.h"
 #include "data/data_notify_settings.h"
-#include "data/data_scheduled_messages.h"
 #include "history/history_location_manager.h"
 #include "base/timer.h"
 #include "base/flags.h"
@@ -89,11 +88,8 @@ public:
 		return _groups;
 	}
 
-	[[nodiscard]] ScheduledMessages &scheduledMessages() {
+	[[nodiscard]] ScheduledMessages &scheduledMessages() const {
-		return _scheduledMessages;
+		return *_scheduledMessages;
-	}
-	[[nodiscard]] const ScheduledMessages &scheduledMessages() const {
-		return _scheduledMessages;
 	}
 
 	void clear();
@@ -989,7 +985,7 @@ private:
 	int32 _wallpapersHash = 0;
 
 	Groups _groups;
-	ScheduledMessages _scheduledMessages;
+	std::unique_ptr<ScheduledMessages> _scheduledMessages;
 
 	rpl::lifetime _lifetime;
 

Telegram/SourceFiles/history/feed/history_feed_section.cpp

@@ -82,6 +82,7 @@ Widget::Widget(
 	_topBar->move(0, 0);
 	_topBar->resizeToWidth(width());
 	_topBar->show();
+
 	_topBar->forwardSelectionRequest(
 	) | rpl::start_with_next([=] {
 		forwardSelected();

Telegram/SourceFiles/history/history.style

@@ -267,6 +267,10 @@ historyBotCommandStart: IconButton(historyAttach) {
 	icon: icon {{ "send_control_bot_command", historyComposeIconFg }};
 	iconOver: icon {{ "send_control_bot_command", historyComposeIconFgOver }};
 }
+historyScheduledToggle: IconButton(historyAttach) {
+	icon: icon {{ "dialogs_calendar", historyComposeIconFg }};
+	iconOver: icon {{ "dialogs_calendar", historyComposeIconFgOver }};
+}
 historyRecordVoiceFg: historyComposeIconFg;
 historyRecordVoiceFgOver: historyComposeIconFgOver;
 historyRecordVoiceFgActive: windowBgActive;

Telegram/SourceFiles/history/history_widget.cpp

@@ -36,6 +36,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_channel.h"
 #include "data/data_chat.h"
 #include "data/data_user.h"
+#include "data/data_scheduled_messages.h"
 #include "history/history.h"
 #include "history/history_item.h"
 #include "history/history_message.h"
@@ -46,6 +47,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 //#include "history/feed/history_feed_section.h" // #feed
 #include "history/view/history_view_service_message.h"
 #include "history/view/history_view_element.h"
+#include "history/view/history_view_scheduled_section.h"
 #include "profile/profile_block_group_members.h"
 #include "info/info_memento.h"
 #include "core/click_handler_types.h"
@@ -644,6 +646,7 @@ HistoryWidget::HistoryWidget(
 		}
 	}, lifetime());
 
+	setupScheduledToggle();
 	orderWidgets();
 	setupShortcuts();
 }
@@ -1766,6 +1769,7 @@ void HistoryWidget::showHistory(
 			session().data().requestNotifySettings(_peer);
 			refreshSilentToggle();
 		}
+		refreshScheduledToggle();
 
 		if (_showAtMsgId == ShowAtUnreadMsgId) {
 			if (_history->scrollTopItem) {
@@ -1902,6 +1906,37 @@ void HistoryWidget::refreshSilentToggle() {
 	}
 }
 
+void HistoryWidget::setupScheduledToggle() {
+	controller()->activeChatValue(
+	) | rpl::map([=](const Dialogs::Key &key) -> rpl::producer<> {
+		if (const auto history = key.history()) {
+			return session().data().scheduledMessages().updates(history);
+		}
+		return rpl::never<rpl::empty_value>();
+	}) | rpl::flatten_latest(
+	) | rpl::start_with_next([=] {
+		refreshScheduledToggle();
+		updateControlsVisibility();
+		updateControlsGeometry();
+	}, lifetime());
+}
+
+void HistoryWidget::refreshScheduledToggle() {
+	const auto has = _history
+		&& _peer->canWrite()
+		&& (session().data().scheduledMessages().count(_history) > 0);
+	if (!_scheduled && has) {
+		_scheduled.create(this, st::historyScheduledToggle);
+		_scheduled->show();
+		_scheduled->addClickHandler([=] {
+			controller()->showSection(
+				HistoryView::ScheduledMemento(_history));
+		});
+	} else if (_scheduled && !has) {
+		_scheduled.destroy();
+	}
+}
+
 bool HistoryWidget::contentOverlapped(const QRect &globalRect) {
 	return (_attachDragDocument->overlaps(globalRect)
 			|| _attachDragPhoto->overlaps(globalRect)
@@ -2004,6 +2039,9 @@ void HistoryWidget::updateControlsVisibility() {
 		if (_silent) {
 			_silent->hide();
 		}
+		if (_scheduled) {
+			_scheduled->hide();
+		}
 		_kbScroll->hide();
 		_fieldBarCancel->hide();
 		_attachToggle->hide();
@@ -2041,6 +2079,9 @@ void HistoryWidget::updateControlsVisibility() {
 			if (_silent) {
 				_silent->hide();
 			}
+			if (_scheduled) {
+				_scheduled->hide();
+			}
 			if (_kbShown) {
 				_kbScroll->show();
 			} else {
@@ -2080,6 +2121,9 @@ void HistoryWidget::updateControlsVisibility() {
 			if (_silent) {
 				_silent->show();
 			}
+			if (_scheduled) {
+				_scheduled->show();
+			}
 			updateFieldPlaceholder();
 		}
 		if (_editMsgId || _replyToId || readyToForward() || (_previewData && _previewData->pendingTill >= 0) || _kbReplyTo) {
@@ -2106,6 +2150,9 @@ void HistoryWidget::updateControlsVisibility() {
 		if (_silent) {
 			_silent->hide();
 		}
+		if (_scheduled) {
+			_scheduled->hide();
+		}
 		_kbScroll->hide();
 		_fieldBarCancel->hide();
 		_attachToggle->hide();
@@ -3841,7 +3888,7 @@ void HistoryWidget::moveFieldControls() {
 	}
 
 // _attachToggle --------- _inlineResults -------------------------------------- _tabbedPanel --------- _fieldBarCancel
-// (_attachDocument|_attachPhoto) _field (_silent|_cmdStart|_kbShow) (_kbHide|_tabbedSelectorToggle) [_broadcast] _send
+// (_attachDocument|_attachPhoto) _field (_scheduled) (_silent|_cmdStart|_kbShow) (_kbHide|_tabbedSelectorToggle) [_broadcast] _send
 // (_botStart|_unblock|_joinChannel|{_muteUnmute&_discuss})
 
 	auto buttonsBottom = bottom - _attachToggle->height();
@@ -3858,6 +3905,13 @@ void HistoryWidget::moveFieldControls() {
 	if (_silent) {
 		_silent->moveToRight(right, buttonsBottom);
 	}
+	const auto kbShowShown = _history && !_kbShown && _keyboard->hasMarkup();
+	if (kbShowShown || _cmdStartShown || _silent) {
+		right += _botCommandStart->width();
+	}
+	if (_scheduled) {
+		_scheduled->moveToRight(right, buttonsBottom);
+	}
 
 	_fieldBarCancel->moveToRight(0, _field->y() - st::historySendPadding - _fieldBarCancel->height());
 	if (_inlineResults) {
@@ -3915,6 +3969,7 @@ void HistoryWidget::updateFieldSize() {
 	if (kbShowShown) fieldWidth -= _botKeyboardShow->width();
 	if (_cmdStartShown) fieldWidth -= _botCommandStart->width();
 	if (_silent) fieldWidth -= _silent->width();
+	if (_scheduled) fieldWidth -= _scheduled->width();
 
 	if (_field->width() != fieldWidth) {
 		_field->resize(fieldWidth, _field->height());
@@ -6089,6 +6144,7 @@ void HistoryWidget::fullPeerUpdated(PeerData *peer) {
 			if (!_canSendMessages) {
 				cancelReply();
 			}
+			refreshScheduledToggle();
 			refreshSilentToggle();
 			refresh = true;
 		}
@@ -6135,6 +6191,7 @@ void HistoryWidget::handlePeerUpdate() {
 			if (!_canSendMessages) {
 				cancelReply();
 			}
+			refreshScheduledToggle();
 			refreshSilentToggle();
 			resize = true;
 		}

Telegram/SourceFiles/history/history_widget.h

@@ -711,6 +711,9 @@ private:
 	bool showInlineBotCancel() const;
 	void refreshSilentToggle();
 
+	void setupScheduledToggle();
+	void refreshScheduledToggle();
+
 	std::unique_ptr<HistoryView::ContactStatus> _contactStatus;
 
 	object_ptr<Ui::SendButton> _send;
@@ -728,6 +731,7 @@ private:
 	object_ptr<Ui::IconButton> _botKeyboardHide;
 	object_ptr<Ui::IconButton> _botCommandStart;
 	object_ptr<Ui::SilentToggle> _silent = { nullptr };
+	object_ptr<Ui::IconButton> _scheduled = { nullptr };
 	bool _cmdStartShown = false;
 	object_ptr<Ui::InputField> _field;
 	bool _recording = false;

Telegram/SourceFiles/history/view/history_view_list_widget.h

@@ -92,7 +92,8 @@ public:
 		int shift = 0;
 	};
 
-	explicit ListMemento(Data::MessagePosition position)
+	explicit ListMemento(
+		Data::MessagePosition position = Data::UnreadMessagePosition)
 	: _aroundPosition(position) {
 	}
 	void setAroundPosition(Data::MessagePosition position) {

Telegram/SourceFiles/history/view/history_view_scheduled_section.cpp

@@ -0,0 +1,423 @@
+/*
+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 "history/view/history_view_scheduled_section.h"
+
+#include "history/view/history_view_top_bar_widget.h"
+#include "history/view/history_view_list_widget.h"
+#include "history/history.h"
+#include "history/history_item.h"
+#include "ui/widgets/scroll_area.h"
+#include "ui/widgets/shadow.h"
+#include "ui/special_buttons.h"
+#include "window/window_session_controller.h"
+#include "core/event_filter.h"
+#include "main/main_session.h"
+#include "data/data_session.h"
+#include "data/data_scheduled_messages.h"
+#include "lang/lang_keys.h"
+#include "styles/style_history.h"
+#include "styles/style_window.h"
+#include "styles/style_info.h"
+
+namespace HistoryView {
+
+object_ptr<Window::SectionWidget> ScheduledMemento::createWidget(
+		QWidget *parent,
+		not_null<Window::SessionController*> controller,
+		Window::Column column,
+		const QRect &geometry) {
+	if (column == Window::Column::Third) {
+		return nullptr;
+	}
+	auto result = object_ptr<ScheduledWidget>(parent, controller, _history);
+	result->setInternalState(geometry, this);
+	return std::move(result);
+}
+
+ScheduledWidget::ScheduledWidget(
+	QWidget *parent,
+	not_null<Window::SessionController*> controller,
+	not_null<History*> history)
+: Window::SectionWidget(parent, controller)
+, _history(history)
+, _scroll(this, st::historyScroll, false)
+, _topBar(this, controller)
+, _topBarShadow(this)
+, _scrollDown(_scroll, st::historyToDown) {
+	_topBar->setActiveChat(_history);
+
+	_topBar->move(0, 0);
+	_topBar->resizeToWidth(width());
+	_topBar->show();
+
+	_topBar->deleteSelectionRequest(
+	) | rpl::start_with_next([=] {
+		confirmDeleteSelected();
+	}, _topBar->lifetime());
+	_topBar->clearSelectionRequest(
+	) | rpl::start_with_next([=] {
+		clearSelected();
+	}, _topBar->lifetime());
+
+	_topBarShadow->raise();
+	updateAdaptiveLayout();
+	subscribe(Adaptive::Changed(), [=] { updateAdaptiveLayout(); });
+
+	_inner = _scroll->setOwnedWidget(object_ptr<ListWidget>(
+		this,
+		controller,
+		static_cast<ListDelegate*>(this)));
+	_scroll->move(0, _topBar->height());
+	_scroll->show();
+	connect(_scroll, &Ui::ScrollArea::scrolled, [=] { onScroll(); });
+
+	setupScrollDownButton();
+}
+
+void ScheduledWidget::setupScrollDownButton() {
+	_scrollDown->setClickedCallback([=] {
+		scrollDownClicked();
+	});
+	Core::InstallEventFilter(_scrollDown, [=](not_null<QEvent*> event) {
+		if (event->type() == QEvent::Wheel) {
+			return _scroll->viewportEvent(event);
+		}
+		return false;
+	});
+	updateScrollDownVisibility();
+}
+
+void ScheduledWidget::scrollDownClicked() {
+	showAtPosition(Data::MaxMessagePosition);
+}
+
+void ScheduledWidget::showAtPosition(Data::MessagePosition position) {
+	if (showAtPositionNow(position)) {
+		if (const auto highlight = base::take(_highlightMessageId)) {
+			_inner->highlightMessage(highlight);
+		}
+	} else {
+		_nextAnimatedScrollPosition = position;
+		_nextAnimatedScrollDelta = _inner->isBelowPosition(position)
+			? -_scroll->height()
+			: _inner->isAbovePosition(position)
+			? _scroll->height()
+			: 0;
+		auto memento = HistoryView::ListMemento(position);
+		_inner->restoreState(&memento);
+	}
+}
+
+bool ScheduledWidget::showAtPositionNow(Data::MessagePosition position) {
+	if (const auto scrollTop = _inner->scrollTopForPosition(position)) {
+		const auto currentScrollTop = _scroll->scrollTop();
+		const auto wanted = snap(*scrollTop, 0, _scroll->scrollTopMax());
+		const auto fullDelta = (wanted - currentScrollTop);
+		const auto limit = _scroll->height();
+		const auto scrollDelta = snap(fullDelta, -limit, limit);
+		_inner->animatedScrollTo(
+			wanted,
+			position,
+			scrollDelta,
+			(std::abs(fullDelta) > limit
+				? HistoryView::ListWidget::AnimatedScroll::Part
+				: HistoryView::ListWidget::AnimatedScroll::Full));
+		return true;
+	}
+	return false;
+}
+
+void ScheduledWidget::updateScrollDownVisibility() {
+	if (animating()) {
+		return;
+	}
+
+	const auto scrollDownIsVisible = [&]() -> std::optional<bool> {
+		const auto top = _scroll->scrollTop() + st::historyToDownShownAfter;
+		if (top < _scroll->scrollTopMax()) {
+			return true;
+		}
+		if (_inner->loadedAtBottomKnown()) {
+			return !_inner->loadedAtBottom();
+		}
+		return std::nullopt;
+	};
+	const auto scrollDownIsShown = scrollDownIsVisible();
+	if (!scrollDownIsShown) {
+		return;
+	}
+	if (_scrollDownIsShown != *scrollDownIsShown) {
+		_scrollDownIsShown = *scrollDownIsShown;
+		_scrollDownShown.start(
+			[=] { updateScrollDownPosition(); },
+			_scrollDownIsShown ? 0. : 1.,
+			_scrollDownIsShown ? 1. : 0.,
+			st::historyToDownDuration);
+	}
+}
+
+void ScheduledWidget::updateScrollDownPosition() {
+	// _scrollDown is a child widget of _scroll, not me.
+	auto top = anim::interpolate(
+		0,
+		_scrollDown->height() + st::historyToDownPosition.y(),
+		_scrollDownShown.value(_scrollDownIsShown ? 1. : 0.));
+	_scrollDown->moveToRight(
+		st::historyToDownPosition.x(),
+		_scroll->height() - top);
+	auto shouldBeHidden = !_scrollDownIsShown && !_scrollDownShown.animating();
+	if (shouldBeHidden != _scrollDown->isHidden()) {
+		_scrollDown->setVisible(!shouldBeHidden);
+	}
+}
+
+void ScheduledWidget::scrollDownAnimationFinish() {
+	_scrollDownShown.stop();
+	updateScrollDownPosition();
+}
+
+void ScheduledWidget::updateAdaptiveLayout() {
+	_topBarShadow->moveToLeft(
+		Adaptive::OneColumn() ? 0 : st::lineWidth,
+		_topBar->height());
+}
+
+not_null<History*> ScheduledWidget::history() const {
+	return _history;
+}
+
+Dialogs::RowDescriptor ScheduledWidget::activeChat() const {
+	return {
+		_history,
+		FullMsgId(_history->channelId(), ShowAtUnreadMsgId)
+	};
+}
+
+QPixmap ScheduledWidget::grabForShowAnimation(const Window::SectionSlideParams &params) {
+	if (params.withTopBarShadow) _topBarShadow->hide();
+	auto result = Ui::GrabWidget(this);
+	if (params.withTopBarShadow) _topBarShadow->show();
+	return result;
+}
+
+void ScheduledWidget::doSetInnerFocus() {
+	_inner->setFocus();
+}
+
+bool ScheduledWidget::showInternal(
+		not_null<Window::SectionMemento*> memento,
+		const Window::SectionShow &params) {
+	if (auto logMemento = dynamic_cast<ScheduledMemento*>(memento.get())) {
+		if (logMemento->getHistory() == history()) {
+			restoreState(logMemento);
+			return true;
+		}
+	}
+	return false;
+}
+
+void ScheduledWidget::setInternalState(
+		const QRect &geometry,
+		not_null<ScheduledMemento*> memento) {
+	setGeometry(geometry);
+	Ui::SendPendingMoveResizeEvents(this);
+	restoreState(memento);
+}
+
+std::unique_ptr<Window::SectionMemento> ScheduledWidget::createMemento() {
+	auto result = std::make_unique<ScheduledMemento>(history());
+	saveState(result.get());
+	return std::move(result);
+}
+
+void ScheduledWidget::saveState(not_null<ScheduledMemento*> memento) {
+	_inner->saveState(memento->list());
+}
+
+void ScheduledWidget::restoreState(not_null<ScheduledMemento*> memento) {
+	_inner->restoreState(memento->list());
+}
+
+void ScheduledWidget::resizeEvent(QResizeEvent *e) {
+	if (!width() || !height()) {
+		return;
+	}
+	updateControlsGeometry();
+}
+
+void ScheduledWidget::updateControlsGeometry() {
+	const auto contentWidth = width();
+
+	const auto newScrollTop = _scroll->isHidden()
+		? std::nullopt
+		: base::make_optional(_scroll->scrollTop() + topDelta());
+	_topBar->resizeToWidth(contentWidth);
+	_topBarShadow->resize(contentWidth, st::lineWidth);
+
+	const auto bottom = height();
+	const auto scrollHeight = bottom
+		- _topBar->height();
+//		- _showNext->height();
+	const auto scrollSize = QSize(contentWidth, scrollHeight);
+	if (_scroll->size() != scrollSize) {
+		_skipScrollEvent = true;
+		_scroll->resize(scrollSize);
+		_inner->resizeToWidth(scrollSize.width(), _scroll->height());
+		_skipScrollEvent = false;
+	}
+	if (!_scroll->isHidden()) {
+		if (newScrollTop) {
+			_scroll->scrollToY(*newScrollTop);
+		}
+		updateInnerVisibleArea();
+	}
+
+	updateScrollDownPosition();
+}
+
+void ScheduledWidget::paintEvent(QPaintEvent *e) {
+	if (animating()) {
+		SectionWidget::paintEvent(e);
+		return;
+	}
+	if (Ui::skipPaintEvent(this, e)) {
+		return;
+	}
+	//if (hasPendingResizedItems()) {
+	//	updateListSize();
+	//}
+
+	//auto ms = crl::now();
+	//_historyDownShown.step(ms);
+
+	SectionWidget::PaintBackground(this, e->rect());
+}
+
+void ScheduledWidget::onScroll() {
+	if (_skipScrollEvent) {
+		return;
+	}
+	updateInnerVisibleArea();
+}
+
+void ScheduledWidget::updateInnerVisibleArea() {
+	const auto scrollTop = _scroll->scrollTop();
+	_inner->setVisibleTopBottom(scrollTop, scrollTop + _scroll->height());
+	updateScrollDownVisibility();
+}
+
+void ScheduledWidget::showAnimatedHook(
+		const Window::SectionSlideParams &params) {
+	_topBar->setAnimatingMode(true);
+	if (params.withTopBarShadow) _topBarShadow->show();
+}
+
+void ScheduledWidget::showFinishedHook() {
+	_topBar->setAnimatingMode(false);
+}
+
+bool ScheduledWidget::wheelEventFromFloatPlayer(QEvent *e) {
+	return _scroll->viewportEvent(e);
+}
+
+QRect ScheduledWidget::rectForFloatPlayer() const {
+	return mapToGlobal(_scroll->geometry());
+}
+
+Context ScheduledWidget::listContext() {
+	return Context::History;
+}
+
+void ScheduledWidget::listScrollTo(int top) {
+	if (_scroll->scrollTop() != top) {
+		_scroll->scrollToY(top);
+	} else {
+		updateInnerVisibleArea();
+	}
+}
+
+void ScheduledWidget::listCancelRequest() {
+	controller()->showBackFromStack();
+}
+
+void ScheduledWidget::listDeleteRequest() {
+	confirmDeleteSelected();
+}
+
+rpl::producer<Data::MessagesSlice> ScheduledWidget::listSource(
+		Data::MessagePosition aroundId,
+		int limitBefore,
+		int limitAfter) {
+	const auto data = &controller()->session().data();
+	return rpl::single(
+		rpl::empty_value()
+	) | rpl::then(
+		data->scheduledMessages().updates(_history)
+	) | rpl::map([=] {
+		return data->scheduledMessages().list(_history);
+	});
+}
+
+bool ScheduledWidget::listAllowsMultiSelect() {
+	return true;
+}
+
+bool ScheduledWidget::listIsLessInOrder(
+		not_null<HistoryItem*> first,
+		not_null<HistoryItem*> second) {
+	return first->position() < second->position();
+}
+
+void ScheduledWidget::listSelectionChanged(SelectedItems &&items) {
+	HistoryView::TopBarWidget::SelectedState state;
+	state.count = items.size();
+	for (const auto item : items) {
+		if (item.canForward) {
+			++state.canForwardCount;
+		}
+		if (item.canDelete) {
+			++state.canDeleteCount;
+		}
+	}
+	_topBar->showSelected(state);
+}
+
+void ScheduledWidget::listVisibleItemsChanged(HistoryItemsList &&items) {
+}
+
+std::optional<int> ScheduledWidget::listUnreadBarView(
+		const std::vector<not_null<Element*>> &elements) {
+	return std::nullopt;
+}
+
+void ScheduledWidget::listContentRefreshed() {
+}
+
+ClickHandlerPtr ScheduledWidget::listDateLink(not_null<Element*> view) {
+	return nullptr;
+}
+
+void ScheduledWidget::confirmDeleteSelected() {
+	auto items = _inner->getSelectedItems();
+	if (items.empty()) {
+		return;
+	}
+	//const auto weak = make_weak(this);
+	//const auto box = Ui::show(Box<DeleteMessagesBox>(std::move(items)));
+	//box->setDeleteConfirmedCallback([=] {
+	//	if (const auto strong = weak.data()) {
+	//		strong->clearSelected();
+	//	}
+	//});
+}
+
+void ScheduledWidget::clearSelected() {
+	_inner->cancelSelection();
+}
+
+} // namespace HistoryView

Telegram/SourceFiles/history/view/history_view_scheduled_section.h

@@ -0,0 +1,161 @@
+/*
+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
+
+#include "window/section_widget.h"
+#include "window/section_memento.h"
+#include "history/view/history_view_list_widget.h"
+
+class History;
+
+namespace Notify {
+struct PeerUpdate;
+} // namespace Notify
+
+namespace Ui {
+class ScrollArea;
+class PlainShadow;
+class FlatButton;
+class HistoryDownButton;
+} // namespace Ui
+
+namespace Profile {
+class BackButton;
+} // namespace Profile
+
+namespace HistoryView {
+
+class Element;
+class TopBarWidget;
+class ScheduledMemento;
+
+class ScheduledWidget final
+	: public Window::SectionWidget
+	, private ListDelegate {
+public:
+	ScheduledWidget(
+		QWidget *parent,
+		not_null<Window::SessionController*> controller,
+		not_null<History*> history);
+
+	not_null<History*> history() const;
+	Dialogs::RowDescriptor activeChat() const override;
+
+	bool hasTopBarShadow() const override {
+		return true;
+	}
+
+	QPixmap grabForShowAnimation(
+		const Window::SectionSlideParams &params) override;
+
+	bool showInternal(
+		not_null<Window::SectionMemento*> memento,
+		const Window::SectionShow &params) override;
+	std::unique_ptr<Window::SectionMemento> createMemento() override;
+
+	void setInternalState(
+		const QRect &geometry,
+		not_null<ScheduledMemento*> memento);
+
+	// Float player interface.
+	bool wheelEventFromFloatPlayer(QEvent *e) override;
+	QRect rectForFloatPlayer() const override;
+
+	// ListDelegate interface.
+	Context listContext() override;
+	void listScrollTo(int top) override;
+	void listCancelRequest() override;
+	void listDeleteRequest() override;
+	rpl::producer<Data::MessagesSlice> listSource(
+		Data::MessagePosition aroundId,
+		int limitBefore,
+		int limitAfter) override;
+	bool listAllowsMultiSelect() override;
+	bool listIsLessInOrder(
+		not_null<HistoryItem*> first,
+		not_null<HistoryItem*> second) override;
+	void listSelectionChanged(SelectedItems &&items) override;
+	void listVisibleItemsChanged(HistoryItemsList &&items) override;
+	std::optional<int> listUnreadBarView(
+		const std::vector<not_null<Element*>> &elements) override;
+	void listContentRefreshed() override;
+	ClickHandlerPtr listDateLink(not_null<Element*> view) override;
+
+protected:
+	void resizeEvent(QResizeEvent *e) override;
+	void paintEvent(QPaintEvent *e) override;
+
+	void showAnimatedHook(
+		const Window::SectionSlideParams &params) override;
+	void showFinishedHook() override;
+	void doSetInnerFocus() override;
+
+private:
+	void onScroll();
+	void updateInnerVisibleArea();
+	void updateControlsGeometry();
+	void updateAdaptiveLayout();
+	void saveState(not_null<ScheduledMemento*> memento);
+	void restoreState(not_null<ScheduledMemento*> memento);
+	void showAtPosition(Data::MessagePosition position);
+	bool showAtPositionNow(Data::MessagePosition position);
+
+	void setupScrollDownButton();
+	void scrollDownClicked();
+	void scrollDownAnimationFinish();
+	void updateScrollDownVisibility();
+	void updateScrollDownPosition();
+
+	void confirmDeleteSelected();
+	void clearSelected();
+
+	const not_null<History*> _history;
+	object_ptr<Ui::ScrollArea> _scroll;
+	QPointer<ListWidget> _inner;
+	object_ptr<TopBarWidget> _topBar;
+	object_ptr<Ui::PlainShadow> _topBarShadow;
+	bool _skipScrollEvent = false;
+
+	FullMsgId _highlightMessageId;
+	std::optional<Data::MessagePosition> _nextAnimatedScrollPosition;
+	int _nextAnimatedScrollDelta = 0;
+
+	Ui::Animations::Simple _scrollDownShown;
+	bool _scrollDownIsShown = false;
+	object_ptr<Ui::HistoryDownButton> _scrollDown;
+
+};
+
+class ScheduledMemento : public Window::SectionMemento {
+public:
+	ScheduledMemento(not_null<History*> history)
+	: _history(history)
+	, _list({}) {
+	}
+
+	object_ptr<Window::SectionWidget> createWidget(
+		QWidget *parent,
+		not_null<Window::SessionController*> controller,
+		Window::Column column,
+		const QRect &geometry) override;
+
+	not_null<History*> getHistory() const {
+		return _history;
+	}
+
+	not_null<ListMemento*> list() {
+		return &_list;
+	}
+
+private:
+	const not_null<History*> _history;
+	ListMemento _list;
+
+};
+
+} // namespace HistoryScheduled

Telegram/SourceFiles/mainwidget.cpp

@@ -22,6 +22,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_channel.h"
 #include "data/data_chat.h"
 #include "data/data_user.h"
+#include "data/data_scheduled_messages.h"
 #include "ui/special_buttons.h"
 #include "ui/widgets/buttons.h"
 #include "ui/widgets/shadow.h"

Telegram/gyp/telegram_sources.txt

@@ -330,6 +330,8 @@
 <(src_loc)/history/view/history_view_message.cpp
 <(src_loc)/history/view/history_view_message.h
 <(src_loc)/history/view/history_view_object.h
+<(src_loc)/history/view/history_view_scheduled_section.cpp
+<(src_loc)/history/view/history_view_scheduled_section.h
 <(src_loc)/history/view/history_view_service_message.cpp
 <(src_loc)/history/view/history_view_service_message.h
 <(src_loc)/history/view/history_view_top_bar_widget.cpp