Add audio playlist using Info::Media::ListWidget.

Telegram/SourceFiles/history/history_media_types.cpp

@@ -1148,12 +1148,12 @@ void HistoryDocument::initDimensions() {
 
 	if (thumbed) {
 		_minh = st::msgFileThumbPadding.top() + st::msgFileThumbSize + st::msgFileThumbPadding.bottom();
-		if (!captioned && (_parent->Has<HistoryMessageSigned>() || _parent->Has<HistoryMessageEdited>())) {
-			_minh += st::msgDateFont->height - st::msgDateDelta.y();
-		}
 	} else {
 		_minh = st::msgFilePadding.top() + st::msgFileSize + st::msgFilePadding.bottom();
 	}
+	if (!captioned && (_parent->Has<HistoryMessageSigned>() || _parent->Has<HistoryMessageEdited>())) {
+		_minh += st::msgDateFont->height - st::msgDateDelta.y();
+	}
 	if (!isBubbleTop()) {
 		_minh -= st::msgFileTopMinus;
 	}

Telegram/SourceFiles/info/common_groups/info_common_groups_inner_widget.cpp

@@ -165,7 +165,7 @@ void ListController::restoreState(
 }
 
 void ListController::rowClicked(not_null<PeerListRow*> row) {
-	_controller->window()->showPeerHistory(
+	_controller->parentController()->showPeerHistory(
 		row->peer(),
 		Window::SectionShow::Way::Forward);
 }

Telegram/SourceFiles/info/info_controller.cpp

@@ -44,16 +44,46 @@ not_null<PeerData*> CorrectPeer(PeerId peerId) {
 
 } // namespace
 
+rpl::producer<SparseIdsMergedSlice> AbstractController::mediaSource(
+		SparseIdsMergedSlice::UniversalMsgId aroundId,
+		int limitBefore,
+		int limitAfter) const {
+	return SharedMediaMergedViewer(
+		SharedMediaMergedKey(
+			SparseIdsMergedSlice::Key(
+				peerId(),
+				migratedPeerId(),
+				aroundId),
+			section().mediaType()),
+		limitBefore,
+		limitAfter);
+}
+
+rpl::producer<QString> AbstractController::mediaSourceQueryValue() const {
+	return rpl::single(QString());
+}
+
+void AbstractController::showSection(
+		Window::SectionMemento &&memento,
+		const Window::SectionShow &params) {
+	return parentController()->showSection(std::move(memento), params);
+}
+
+void AbstractController::showBackFromStack(
+		const Window::SectionShow &params) {
+	return parentController()->showBackFromStack(params);
+}
+
 Controller::Controller(
 	not_null<WrapWidget*> widget,
 	not_null<Window::Controller*> window,
 	not_null<ContentMemento*> memento)
-: _widget(widget)
+: AbstractController(window)
+, _widget(widget)
 , _peer(App::peer(memento->peerId()))
 , _migrated(memento->migratedPeerId()
 	? App::peer(memento->migratedPeerId())
 	: nullptr)
-, _window(window)
 , _section(memento->section()) {
 	updateSearchControllers(memento);
 	setupMigrationViewer();
@@ -66,11 +96,11 @@ void Controller::setupMigrationViewer() {
 	Notify::PeerUpdateValue(_peer, Notify::PeerUpdate::Flag::MigrationChanged)
 		| rpl::start_with_next([this] {
 			if (_peer->migrateTo() || (_peer->migrateFrom() != _migrated)) {
-				auto windowController = window();
+				auto window = parentController();
 				auto peerId = _peer->id;
 				auto section = _section;
 				InvokeQueued(_widget, [=] {
-					windowController->showSection(
+					window->showSection(
 						Memento(peerId, section),
 						Window::SectionShow(
 							Window::SectionShow::Way::Backward,
@@ -162,13 +192,13 @@ void Controller::showSection(
 		Window::SectionMemento &&memento,
 		const Window::SectionShow &params) {
 	if (!_widget->showInternal(&memento, params)) {
-		_window->showSection(std::move(memento), params);
+		AbstractController::showSection(std::move(memento), params);
 	}
 }
 
 void Controller::showBackFromStack(const Window::SectionShow &params) {
 	if (!_widget->showBackFromStackInternal(params)) {
-		_window->showBackFromStack(params);
+		AbstractController::showBackFromStack(params);
 	}
 }
 

Telegram/SourceFiles/info/info_controller.h

@@ -67,26 +67,62 @@ private:
 
 };
 
-class Controller : public Window::Navigation {
+class AbstractController : public Window::Navigation {
+public:
+	AbstractController(not_null<Window::Controller*> parent)
+	: _parent(parent) {
+	}
+
+	virtual not_null<PeerData*> peer() const = 0;
+	virtual PeerData *migrated() const = 0;
+	virtual Section section() const = 0;
+
+	PeerId peerId() const {
+		return peer()->id;
+	}
+	PeerId migratedPeerId() const {
+		if (auto peer = migrated()) {
+			return peer->id;
+		}
+		return PeerId(0);
+	}
+
+	virtual void setSearchEnabledByContent(bool enabled) {
+	}
+	virtual rpl::producer<SparseIdsMergedSlice> mediaSource(
+		SparseIdsMergedSlice::UniversalMsgId aroundId,
+		int limitBefore,
+		int limitAfter) const;
+	virtual rpl::producer<QString> mediaSourceQueryValue() const;
+
+	void showSection(
+		Window::SectionMemento &&memento,
+		const Window::SectionShow &params = Window::SectionShow()) override;
+	void showBackFromStack(
+		const Window::SectionShow &params = Window::SectionShow()) override;
+	not_null<Window::Controller*> parentController() override {
+		return _parent;
+	}
+
+private:
+	not_null<Window::Controller*> _parent;
+
+};
+
+class Controller : public AbstractController {
 public:
 	Controller(
 		not_null<WrapWidget*> widget,
 		not_null<Window::Controller*> window,
 		not_null<ContentMemento*> memento);
 
-	not_null<PeerData*> peer() const {
+	not_null<PeerData*> peer() const override {
 		return _peer;
 	}
-	PeerData *migrated() const {
+	PeerData *migrated() const override {
 		return _migrated;
 	}
-	PeerId peerId() const {
-		return _peer->id;
-	}
-	PeerId migratedPeerId() const {
-		return _migrated ? _migrated->id : PeerId(0);
-	}
-	const Section &section() const {
+	Section section() const override {
 		return _section;
 	}
 
@@ -97,21 +133,18 @@ public:
 	rpl::producer<Wrap> wrapValue() const;
 	void setSection(not_null<ContentMemento*> memento);
 
-	not_null<Window::Controller*> window() const {
-		return _window;
-	}
 	Ui::SearchFieldController *searchFieldController() const {
 		return _searchFieldController.get();
 	}
-	void setSearchEnabledByContent(bool enabled) {
+	void setSearchEnabledByContent(bool enabled) override {
 		_seachEnabledByContent = enabled;
 	}
 	rpl::producer<bool> searchEnabledByContent() const;
 	rpl::producer<SparseIdsMergedSlice> mediaSource(
 		SparseIdsMergedSlice::UniversalMsgId aroundId,
 		int limitBefore,
-		int limitAfter) const;
-	rpl::producer<QString> mediaSourceQueryValue() const;
+		int limitAfter) const override;
+	rpl::producer<QString> mediaSourceQueryValue() const override;
 	bool takeSearchStartsFocused() {
 		return base::take(_searchStartsFocused);
 	}
@@ -123,9 +156,6 @@ public:
 		const Window::SectionShow &params = Window::SectionShow()) override;
 	void showBackFromStack(
 		const Window::SectionShow &params = Window::SectionShow()) override;
-	not_null<Window::Controller*> parentController() override {
-		return _window;
-	}
 
 	rpl::lifetime &lifetime() {
 		return _lifetime;
@@ -143,7 +173,6 @@ private:
 	not_null<WrapWidget*> _widget;
 	not_null<PeerData*> _peer;
 	PeerData *_migrated = nullptr;
-	not_null<Window::Controller*> _window;
 	rpl::variable<Wrap> _wrap;
 	Section _section;
 

Telegram/SourceFiles/info/info_wrap_widget.cpp

@@ -116,7 +116,7 @@ void WrapWidget::startInjectingActivePeerProfiles() {
 	using namespace rpl::mappers;
 	rpl::combine(
 		_wrap.value(),
-		_controller->window()->activePeer.value())
+		_controller->parentController()->activePeer.value())
 		| rpl::filter((_1 == Wrap::Side) && (_2 != nullptr))
 		| rpl::map(_2)
 		| rpl::start_with_next([this](not_null<PeerData*> peer) {
@@ -241,7 +241,7 @@ void WrapWidget::forceContentRepaint() {
 //		_anotherTabMemento = createTabMemento(tab);
 //	}
 //	auto newController = createController(
-//		_controller->window(),
+//		_controller->parentController(),
 //		_anotherTabMemento.get());
 //	auto newContent = createContent(
 //		_anotherTabMemento.get(),
@@ -331,7 +331,7 @@ void WrapWidget::createTopBar() {
 				_topBar,
 				st::infoTopBarClose));
 		close->addClickHandler([this] {
-			_controller->window()->closeThirdSection();
+			_controller->parentController()->closeThirdSection();
 		});
 	}
 	if (wrapValue == Wrap::Layer) {
@@ -340,7 +340,7 @@ void WrapWidget::createTopBar() {
 				_topBar,
 				st::infoLayerTopBarClose));
 		close->addClickHandler([this] {
-			_controller->window()->hideSpecialLayer();
+			_controller->parentController()->hideSpecialLayer();
 		});
 	} else if (requireTopBarSearch()) {
 		auto search = _controller->searchFieldController();
@@ -465,7 +465,7 @@ void WrapWidget::showProfileMenu() {
 	_topBarMenuToggle->installEventFilter(_topBarMenu.get());
 
 	Window::FillPeerMenu(
-		_controller->window(),
+		_controller->parentController(),
 		_controller->peer(),
 		[this](const QString &text, base::lambda<void()> callback) {
 			return _topBarMenu->addAction(text, std::move(callback));
@@ -788,7 +788,7 @@ void WrapWidget::showNewContent(
 		&& (params.animated != anim::type::instant);
 	auto animationParams = SectionSlideParams();
 	auto newController = createController(
-		_controller->window(),
+		_controller->parentController(),
 		memento);
 	auto newContent = object_ptr<ContentWidget>(nullptr);
 	if (needAnimation) {

Telegram/SourceFiles/info/media/info_media_list_widget.cpp

@@ -35,6 +35,7 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 #include "window/main_window.h"
 #include "styles/style_overview.h"
 #include "styles/style_info.h"
+#include "media/player/media_player_instance.h"
 #include "boxes/peer_list_controllers.h"
 #include "boxes/confirm_box.h"
 #include "core/file_utilities.h"
@@ -546,7 +547,7 @@ void ListWidget::Section::refreshHeight() {
 
 ListWidget::ListWidget(
 	QWidget *parent,
-	not_null<Controller*> controller)
+	not_null<AbstractController*> controller)
 : RpWidget(parent)
 , _controller(controller)
 , _peer(_controller->peer())
@@ -594,6 +595,18 @@ rpl::producer<SelectedItems> ListWidget::selectedListValue() const {
 		collectSelectedItems());
 }
 
+QRect ListWidget::getCurrentSongGeometry() {
+	const auto type = AudioMsgId::Type::Song;
+	const auto current = ::Media::Player::instance()->current(type);
+	const auto fullMsgId = current.contextId();
+	if (fullMsgId && isPossiblyMyId(fullMsgId)) {
+		if (const auto item = findItemById(GetUniversalId(fullMsgId))) {
+			return item->geometry;
+		}
+	}
+	return QRect(0, 0, width(), 0);
+}
+
 void ListWidget::restart() {
 	mouseActionCancel();
 
@@ -1347,6 +1360,7 @@ void ListWidget::showContextMenu(
 			_contextMenu = nullptr;
 			mouseActionUpdate(QCursor::pos());
 			repaintItem(universalId);
+			_checkForHide.fire({});
 		}));
 	_contextMenu->popup(e->globalPos());
 	e->accept();
@@ -1373,12 +1387,14 @@ void ListWidget::forwardItem(UniversalMsgId universalId) {
 }
 
 void ListWidget::forwardItems(MessageIdsList &&items) {
-	const auto weak = make_weak(this);
-	Window::ShowForwardMessagesBox(std::move(items), [weak] {
+	auto callback = [weak = make_weak(this)] {
 		if (const auto strong = weak.data()) {
 			strong->clearSelected();
 		}
-	});
+	};
+	setActionBoxWeak(Window::ShowForwardMessagesBox(
+		std::move(items),
+		std::move(callback)));
 }
 
 void ListWidget::deleteSelected() {
@@ -1393,7 +1409,19 @@ void ListWidget::deleteItem(UniversalMsgId universalId) {
 
 void ListWidget::deleteItems(MessageIdsList &&items) {
 	if (!items.empty()) {
-		Ui::show(Box<DeleteMessagesBox>(std::move(items)));
+		const auto box = Ui::show(Box<DeleteMessagesBox>(std::move(items)));
+		setActionBoxWeak(box.data());
+	}
+}
+
+void ListWidget::setActionBoxWeak(QPointer<Ui::RpWidget> box) {
+	if ((_actionBoxWeak = box)) {
+		_actionBoxWeakLifetime = _actionBoxWeak->alive(
+		) | rpl::start_with_done([weak = make_weak(this)]{
+			if (weak) {
+				weak->_checkForHide.fire({});
+			}
+		});
 	}
 }
 
@@ -1768,8 +1796,8 @@ void ListWidget::mouseActionStart(const QPoint &screenPos, Qt::MouseButton butto
 	auto pressLayout = _overLayout;
 
 	_mouseAction = MouseAction::None;
-	_pressWasInactive = _controller->window()->window()->wasInactivePress();
-	if (_pressWasInactive) _controller->window()->window()->setInactivePress(false);
+	_pressWasInactive = _controller->parentController()->window()->wasInactivePress();
+	if (_pressWasInactive) _controller->parentController()->window()->setInactivePress(false);
 
 	if (ClickHandler::getPressed() && !hasSelected()) {
 		_mouseAction = MouseAction::PrepareDrag;
@@ -1893,7 +1921,7 @@ void ListWidget::performDrag() {
 	//			mimeData->setData(qsl("application/x-td-forward-selected"), "1");
 	//		}
 	//	}
-	//	_controller->window()->launchDrag(std::move(mimeData));
+	//	_controller->parentController()->window()->launchDrag(std::move(mimeData));
 	//	return;
 	//} else {
 	//	auto forwardMimeType = QString();
@@ -1924,7 +1952,7 @@ void ListWidget::performDrag() {
 	//		}
 
 	//		// This call enters event loop and can destroy any QObject.
-	//		_controller->window()->launchDrag(std::move(mimeData));
+	//		_controller->parentController()->window()->launchDrag(std::move(mimeData));
 	//		return;
 	//	}
 	//}
@@ -1974,7 +2002,7 @@ void ListWidget::mouseActionFinish(const QPoint &screenPos, Qt::MouseButton butt
 			if (selection.text != FullSelection
 				&& selection.text.from == selection.text.to) {
 				clearSelected();
-				//_controller->window()->setInnerFocus(); // #TODO focus
+				//_controller->parentController()->window()->setInnerFocus(); // #TODO focus
 			}
 		}
 	}

Telegram/SourceFiles/info/media/info_media_list_widget.h

@@ -40,7 +40,7 @@ class Controller;
 
 namespace Info {
 
-class Controller;
+class AbstractController;
 
 namespace Media {
 
@@ -51,7 +51,7 @@ class ListWidget : public Ui::RpWidget {
 public:
 	ListWidget(
 		QWidget *parent,
-		not_null<Controller*> controller);
+		not_null<AbstractController*> controller);
 
 	void restart();
 
@@ -61,6 +61,14 @@ public:
 		clearSelected();
 	}
 
+	QRect getCurrentSongGeometry();
+	rpl::producer<> checkForHide() const {
+		return _checkForHide.events();
+	}
+	bool preventAutoHide() const {
+		return (_contextMenu != nullptr) || (_actionBoxWeak != nullptr);
+	}
+
 	void saveState(not_null<Memento*> memento);
 	void restoreState(not_null<Memento*> memento);
 
@@ -259,7 +267,9 @@ private:
 	void validateTrippleClickStartTime();
 	void checkMoveToOtherViewer();
 
-	const not_null<Controller*> _controller;
+	void setActionBoxWeak(QPointer<Ui::RpWidget> box);
+
+	const not_null<AbstractController*> _controller;
 	const not_null<PeerData*> _peer;
 	PeerData * const _migrated = nullptr;
 	Type _type = Type::Photo;
@@ -294,7 +304,11 @@ private:
 	style::cursor _cursor = style::cur_default;
 	DragSelectAction _dragSelectAction = DragSelectAction::None;
 	bool _wasSelectedText = false; // was some text selected in current drag action
+
 	Ui::PopupMenu *_contextMenu = nullptr;
+	rpl::event_stream<> _checkForHide;
+	QPointer<Ui::RpWidget> _actionBoxWeak;
+	rpl::lifetime _actionBoxWeakLifetime;
 
 	QPoint _trippleClickPoint;
 	TimeMs _trippleClickStartTime = 0;

Telegram/SourceFiles/info/profile/info_profile_actions.cpp

@@ -325,7 +325,7 @@ Ui::MultiSlideTracker DetailsFiller::fillUserButtons(
 	using namespace rpl::mappers;
 
 	Ui::MultiSlideTracker tracker;
-	auto window = _controller->window();
+	auto window = _controller->parentController();
 
 	auto addSendMessageButton = [&] {
 		auto sendMessageVisible = rpl::combine(
@@ -377,7 +377,7 @@ Ui::MultiSlideTracker DetailsFiller::fillChannelButtons(
 	using namespace rpl::mappers;
 
 	Ui::MultiSlideTracker tracker;
-	auto window = _controller->window();
+	auto window = _controller->parentController();
 	auto viewChannelVisible = rpl::combine(
 		_controller->wrapValue(),
 		window->historyPeer.value(),

Telegram/SourceFiles/info/profile/info_profile_cover.cpp

@@ -234,7 +234,7 @@ Cover::Cover(
 , _peer(peer)
 , _userpic(
 	this,
-	controller->window(),
+	controller->parentController(),
 	_peer,
 	Ui::UserpicButton::Role::OpenPhoto,
 	st::infoProfilePhoto)

Telegram/SourceFiles/info/profile/info_profile_members.cpp

@@ -74,7 +74,7 @@ Members::Members(
 		| rpl::start_with_next([this](int count) {
 			const auto enabled = (count >= kEnableSearchMembersAfterCount);
 			_controller->setSearchEnabledByContent(enabled);
-		});
+		}, lifetime());
 }
 
 int Members::desiredHeight() const {

Telegram/SourceFiles/mainwidget.cpp

@@ -198,8 +198,11 @@ MainWidget::MainWidget(
 , _sideShadow(this)
 , _dialogs(this, _controller)
 , _history(this, _controller)
-, _playerPlaylist(this, Media::Player::Panel::Layout::OnlyPlaylist)
-, _playerPanel(this, Media::Player::Panel::Layout::Full) {
+, _playerPlaylist(
+	this,
+	_controller,
+	Media::Player::Panel::Layout::OnlyPlaylist)
+, _playerPanel(this, _controller, Media::Player::Panel::Layout::Full) {
 	Messenger::Instance().mtp()->setUpdatesHandler(rpcDone(&MainWidget::updateReceived));
 	Messenger::Instance().mtp()->setGlobalFailHandler(rpcFail(&MainWidget::updateFail));
 

Telegram/SourceFiles/media/player/media_player.style

@@ -226,7 +226,7 @@ mediaPlayerPanelVolumeToggleTop: 57px;
 
 mediaPlayerScroll: ScrollArea(defaultSolidScroll) {
 	deltat: 10px;
-	deltab: 0px;
+	deltab: 10px;
 }
 mediaPlayerListHeightMax: 280px;
 mediaPlayerListMarginBottom: 10px;

Telegram/SourceFiles/media/player/media_player_instance.cpp

@@ -199,7 +199,7 @@ auto Instance::playlistKey(not_null<Data*> data) const
 -> base::optional<SliceKey> {
 	const auto contextId = data->current.contextId();
 	const auto history = data->history;
-	if (!contextId || !history) {
+	if (!contextId || !history || !IsServerMsgId(contextId.msg)) {
 		return {};
 	}
 

Telegram/SourceFiles/media/player/media_player_panel.cpp

@@ -22,25 +22,36 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 
 #include "media/player/media_player_cover.h"
 #include "media/player/media_player_instance.h"
-#include "styles/style_overview.h"
-#include "styles/style_widgets.h"
-#include "styles/style_media_player.h"
+#include "info/media/info_media_list_widget.h"
 #include "ui/widgets/shadow.h"
 #include "ui/widgets/scroll_area.h"
 #include "mainwindow.h"
+#include "styles/style_overview.h"
+#include "styles/style_widgets.h"
+#include "styles/style_media_player.h"
+#include "styles/style_info.h"
 
 namespace Media {
 namespace Player {
+namespace {
 
-Panel::Panel(QWidget *parent, Layout layout) : TWidget(parent)
+using ListWidget = Info::Media::ListWidget;
+
+constexpr auto kPlaylistIdsLimit = 32;
+constexpr auto kDelayedHideTimeout = TimeMs(3000);
+
+} // namespace
+
+Panel::Panel(
+	QWidget *parent,
+	not_null<Window::Controller*> window,
+	Layout layout)
+: RpWidget(parent)
+, AbstractController(window)
 , _layout(layout)
+, _showTimer([this] { startShow(); })
+, _hideTimer([this] { startHideChecked(); })
 , _scroll(this, st::mediaPlayerScroll) {
-	_hideTimer.setSingleShot(true);
-	connect(&_hideTimer, SIGNAL(timeout()), this, SLOT(onHideStart()));
-
-	_showTimer.setSingleShot(true);
-	connect(&_showTimer, SIGNAL(timeout()), this, SLOT(onShowStart()));
-
 	hide();
 	updateSize();
 }
@@ -53,7 +64,7 @@ bool Panel::overlaps(const QRect &globalRect) {
 	return rect().marginsRemoved(QMargins(marginLeft, contentTop(), marginRight, contentBottom())).contains(QRect(mapFromGlobal(globalRect.topLeft()), globalRect.size()));
 }
 
-void Panel::onWindowActiveChanged() {
+void Panel::windowActiveChanged() {
 	if (!App::wnd()->windowHandle()->isActive() && !isHidden()) {
 		leaveEvent(nullptr);
 	}
@@ -63,16 +74,36 @@ void Panel::resizeEvent(QResizeEvent *e) {
 	updateControlsGeometry();
 }
 
-void Panel::onListHeightUpdated() {
-	if (auto widget = _scroll->widget()) {
-		if (widget->height() > 0 || _cover) {
-			updateSize();
-		} else {
-			hideIgnoringEnterEvents();
-		}
+void Panel::listHeightUpdated(int newHeight) {
+	if (newHeight > emptyInnerHeight() || _cover) {
+		updateSize();
+	} else {
+		_hideTimer.callOnce(0);
 	}
 }
 
+bool Panel::contentTooSmall() const {
+	const auto innerHeight = _scroll->widget()
+		? _scroll->widget()->height()
+		: emptyInnerHeight();
+	return (innerHeight <= emptyInnerHeight() && !_cover);
+}
+
+int Panel::emptyInnerHeight() const {
+	return st::infoMediaMargin.top()
+		+ st::overviewFileLayout.songPadding.top()
+		+ st::overviewFileLayout.songThumbSize
+		+ st::overviewFileLayout.songPadding.bottom()
+		+ st::infoMediaMargin.bottom();
+}
+
+bool Panel::preventAutoHide() const {
+	if (const auto list = static_cast<ListWidget*>(_scroll->widget())) {
+		return list->preventAutoHide();
+	}
+	return false;
+}
+
 void Panel::updateControlsGeometry() {
 	auto scrollTop = contentTop();
 	auto width = contentWidth();
@@ -91,7 +122,6 @@ void Panel::updateControlsGeometry() {
 	}
 	if (auto widget = static_cast<TWidget*>(_scroll->widget())) {
 		widget->resizeToWidth(width);
-		onScroll();
 	}
 }
 
@@ -103,19 +133,9 @@ int Panel::bestPositionFor(int left) const {
 }
 
 void Panel::scrollPlaylistToCurrentTrack() {
-	// #TODO playlist
-	//if (auto list = static_cast<ListWidget*>(_scroll->widget())) {
-	//	auto rect = list->getCurrentTrackGeometry();
-	//	auto top = _scroll->scrollTop(), bottom = top + _scroll->height();
-	//	_scroll->scrollToY(rect.y());
-	//}
-}
-
-void Panel::onScroll() {
-	if (auto widget = static_cast<TWidget*>(_scroll->widget())) {
-		int visibleTop = _scroll->scrollTop();
-		int visibleBottom = visibleTop + _scroll->height();
-		widget->setVisibleTopBottom(visibleTop, visibleBottom);
+	if (const auto list = static_cast<ListWidget*>(_scroll->widget())) {
+		const auto rect = list->getCurrentSongGeometry();
+		_scroll->scrollToY(rect.y() - st::infoMediaMargin.top());
 	}
 }
 
@@ -170,42 +190,45 @@ void Panel::paintEvent(QPaintEvent *e) {
 }
 
 void Panel::enterEventHook(QEvent *e) {
-	if (_ignoringEnterEvents) return;
+	if (_ignoringEnterEvents || contentTooSmall()) return;
 
-	_hideTimer.stop();
+	_hideTimer.cancel();
 	if (_a_appearance.animating(getms())) {
-		onShowStart();
+		startShow();
 	} else {
-		_showTimer.start(0);
+		_showTimer.callOnce(0);
 	}
 	return TWidget::enterEventHook(e);
 }
 
 void Panel::leaveEventHook(QEvent *e) {
-	_showTimer.stop();
+	if (preventAutoHide()) {
+		return;
+	}
+	_showTimer.cancel();
 	if (_a_appearance.animating(getms())) {
-		onHideStart();
+		startHide();
 	} else {
-		_hideTimer.start(300);
+		_hideTimer.callOnce(300);
 	}
 	return TWidget::leaveEventHook(e);
 }
 
 void Panel::showFromOther() {
-	_hideTimer.stop();
+	_hideTimer.cancel();
 	if (_a_appearance.animating(getms())) {
-		onShowStart();
+		startShow();
 	} else {
-		_showTimer.start(300);
+		_showTimer.callOnce(300);
 	}
 }
 
 void Panel::hideFromOther() {
-	_showTimer.stop();
+	_showTimer.cancel();
 	if (_a_appearance.animating(getms())) {
-		onHideStart();
+		startHide();
 	} else {
-		_hideTimer.start(0);
+		_hideTimer.callOnce(0);
 	}
 }
 
@@ -219,32 +242,108 @@ void Panel::ensureCreated() {
 
 		_scrollShadow.create(this, st::mediaPlayerScrollShadow, RectPart::Bottom);
 	}
-	// #TODO playlist
-	//auto list = object_ptr<ListWidget>(this);
-	//connect(list, SIGNAL(heightUpdated()), this, SLOT(onListHeightUpdated()));
-	//_scroll->setOwnedWidget(std::move(list));
+	_refreshListLifetime = instance()->playlistChanges(
+		AudioMsgId::Type::Song
+	) | rpl::start_with_next([this] {
+		refreshList();
+	});
+	refreshList();
 
 	if (cPlatform() == dbipMac || cPlatform() == dbipMacOld) {
-		if (auto window = App::wnd()) {
-			connect(window->windowHandle(), SIGNAL(activeChanged()), this, SLOT(onWindowActiveChanged()));
+		if (const auto window = App::wnd()) {
+			connect(
+				window->windowHandle(),
+				&QWindow::activeChanged,
+				this,
+				&Panel::windowActiveChanged);
 		}
 	}
 
-	updateSize();
-	updateControlsGeometry();
 	_ignoringEnterEvents = false;
 }
 
+void Panel::refreshList() {
+	const auto current = instance()->current(AudioMsgId::Type::Song);
+	const auto contextId = current.contextId();
+	const auto peer = [&]() -> PeerData* {
+		const auto item = contextId ? App::histItemById(contextId) : nullptr;
+		if (item) {
+			const auto result = item->history()->peer;
+			if (const auto migrated = result->migrateTo()) {
+				return migrated;
+			}
+			return result;
+		}
+		return nullptr;
+	}();
+	const auto migrated = peer ? peer->migrateFrom() : nullptr;
+	if (_listPeer != peer || _listMigratedPeer != migrated) {
+		_scroll->takeWidget<QWidget>().destroy();
+		_listPeer = _listMigratedPeer = nullptr;
+	}
+	if (peer && !_listPeer) {
+		_listPeer = peer;
+		_listMigratedPeer = migrated;
+		auto list = object_ptr<ListWidget>(this, infoController());
+
+		const auto weak = _scroll->setOwnedWidget(std::move(list));
+
+		updateSize();
+		updateControlsGeometry();
+
+		weak->checkForHide(
+		) | rpl::start_with_next([this] {
+			if (!rect().contains(mapFromGlobal(QCursor::pos()))) {
+				_hideTimer.callOnce(kDelayedHideTimeout);
+			}
+		}, weak->lifetime());
+
+		weak->heightValue(
+		) | rpl::start_with_next([this](int newHeight) {
+			listHeightUpdated(newHeight);
+		}, weak->lifetime());
+
+		weak->scrollToRequests(
+		) | rpl::start_with_next([this](int newScrollTop) {
+			_scroll->scrollToY(newScrollTop);
+		}, weak->lifetime());
+
+		using namespace rpl::mappers;
+		rpl::combine(
+			_scroll->scrollTopValue(),
+			_scroll->heightValue(),
+			tuple(_1, _1 + _2)
+		) | rpl::start_with_next([=](int top, int bottom) {
+			weak->setVisibleTopBottom(top, bottom);
+		}, weak->lifetime());
+
+		auto memento = Info::Media::Memento(
+			peerId(),
+			migratedPeerId(),
+			section().mediaType());
+		memento.setAroundId(contextId);
+		memento.setIdsLimit(kPlaylistIdsLimit);
+		memento.setScrollTopItem(contextId);
+		memento.setScrollTopShift(-st::infoMediaMargin.top());
+		weak->restoreState(&memento);
+	}
+}
+
 void Panel::performDestroy() {
 	if (!_scroll->widget()) return;
 
 	_cover.destroy();
-	// #TODO playlist
-	//_scroll->takeWidget<ListWidget>().destroyDelayed();
+	_scroll->takeWidget<QWidget>().destroy();
+	_listPeer = _listMigratedPeer = nullptr;
+	_refreshListLifetime.destroy();
 
 	if (cPlatform() == dbipMac || cPlatform() == dbipMacOld) {
-		if (auto window = App::wnd()) {
-			disconnect(window->windowHandle(), SIGNAL(activeChanged()), this, SLOT(onWindowActiveChanged()));
+		if (const auto window = App::wnd()) {
+			disconnect(
+				window->windowHandle(),
+				&QWindow::activeChanged,
+				this,
+				&Panel::windowActiveChanged);
 		}
 	}
 }
@@ -263,12 +362,22 @@ void Panel::setCloseCallback(ButtonCallback &&callback) {
 	}
 }
 
-void Panel::onShowStart() {
+not_null<PeerData*> Panel::peer() const {
+	return _listPeer;
+}
+
+PeerData *Panel::migrated() const {
+	return _listMigratedPeer;
+}
+
+Info::Section Panel::section() const {
+	return Info::Section(Info::Section::MediaType::MusicFile);
+}
+
+void Panel::startShow() {
 	ensureCreated();
-	if (auto widget = _scroll->widget()) {
-		if (widget->height() <= 0 && !_cover) {
-			return;
-		}
+	if (contentTooSmall()) {
+		return;
 	}
 
 	if (isHidden()) {
@@ -286,11 +395,22 @@ void Panel::hideIgnoringEnterEvents() {
 	if (isHidden()) {
 		hideFinished();
 	} else {
-		onHideStart();
+		startHide();
 	}
 }
 
-void Panel::onHideStart() {
+void Panel::startHideChecked() {
+	if (!contentTooSmall() && preventAutoHide()) {
+		return;
+	}
+	if (isHidden()) {
+		hideFinished();
+	} else {
+		startHide();
+	}
+}
+
+void Panel::startHide() {
 	if (_hiding || isHidden()) return;
 
 	_hiding = true;
@@ -340,7 +460,7 @@ int Panel::contentBottom() const {
 }
 
 int Panel::scrollMarginBottom() const {
-	return st::mediaPlayerPanelMarginBottom;
+	return 0;// st::mediaPlayerPanelMarginBottom;
 }
 
 } // namespace Player

Telegram/SourceFiles/media/player/media_player_panel.h

@@ -20,6 +20,14 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 */
 #pragma once
 
+#include "base/timer.h"
+#include "ui/rp_widget.h"
+#include "info/info_controller.h"
+
+namespace Window {
+class Controller;
+} // namespace Window
+
 namespace Ui {
 class ScrollArea;
 class Shadow;
@@ -30,15 +38,16 @@ namespace Player {
 
 class CoverWidget;
 
-class Panel : public TWidget {
-	Q_OBJECT
-
+class Panel : public Ui::RpWidget, private Info::AbstractController {
 public:
 	enum class Layout {
 		Full,
 		OnlyPlaylist,
 	};
-	Panel(QWidget *parent, Layout layout);
+	Panel(
+		QWidget *parent,
+		not_null<Window::Controller*> controller,
+		Layout layout);
 
 	bool overlaps(const QRect &globalRect);
 
@@ -59,20 +68,26 @@ protected:
 	void enterEventHook(QEvent *e) override;
 	void leaveEventHook(QEvent *e) override;
 
-private slots:
-	void onShowStart();
-	void onHideStart();
-
-	void onScroll();
-	void onListHeightUpdated();
-	void onWindowActiveChanged();
-
 private:
+	// Info::AbstractController implementation.
+	not_null<PeerData*> peer() const override;
+	PeerData *migrated() const override;
+	Info::Section section() const override;
+
+	void startShow();
+	void startHide();
+	void startHideChecked();
+	bool preventAutoHide() const;
+	void listHeightUpdated(int newHeight);
+	int emptyInnerHeight() const;
+	bool contentTooSmall() const;
+	void windowActiveChanged();
+
 	void ensureCreated();
 	void performDestroy();
 
 	void updateControlsGeometry();
-
+	void refreshList();
 	void updateSize();
 	void appearanceCallback();
 	void hideFinished();
@@ -90,6 +105,9 @@ private:
 
 	void startAnimation();
 	void scrollPlaylistToCurrentTrack();
+	not_null<Info::AbstractController*> infoController() {
+		return static_cast<Info::AbstractController*>(this);
+	}
 
 	Layout _layout;
 	bool _hiding = false;
@@ -99,13 +117,18 @@ private:
 
 	bool _ignoringEnterEvents = false;
 
-	QTimer _hideTimer, _showTimer;
+	base::Timer _showTimer;
+	base::Timer _hideTimer;
 
 	ButtonCallback _pinCallback, _closeCallback;
 	object_ptr<CoverWidget> _cover = { nullptr };
 	object_ptr<Ui::ScrollArea> _scroll;
 	object_ptr<Ui::Shadow> _scrollShadow = { nullptr };
 
+	rpl::lifetime _refreshListLifetime;
+	PeerData *_listPeer = nullptr;
+	PeerData *_listMigratedPeer = nullptr;
+
 };
 
 } // namespace Clip

Telegram/SourceFiles/window/window_peer_menu.cpp

@@ -457,7 +457,7 @@ void PeerMenuShareContactBox(not_null<UserData*> user) {
 		}));
 }
 
-void ShowForwardMessagesBox(
+QPointer<Ui::RpWidget> ShowForwardMessagesBox(
 		MessageIdsList &&items,
 		base::lambda_once<void()> &&successCallback) {
 	const auto weak = std::make_shared<QPointer<PeerListBox>>();
@@ -493,6 +493,7 @@ void ShowForwardMessagesBox(
 	*weak = Ui::show(Box<PeerListBox>(
 		std::make_unique<ChooseRecipientBoxController>(std::move(callback)),
 		std::move(initBox)), LayerOption::KeepOther);
+	return weak->data();
 }
 
 void PeerMenuAddChannelMembers(not_null<ChannelData*> channel) {

Telegram/SourceFiles/window/window_peer_menu.h

@@ -20,6 +20,10 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 */
 #pragma once
 
+namespace Ui {
+class RpWidget;
+} // namespace Ui
+
 namespace Window {
 
 class Controller;
@@ -48,7 +52,7 @@ void PeerMenuAddChannelMembers(not_null<ChannelData*> channel);
 base::lambda<void()> ClearHistoryHandler(not_null<PeerData*> peer);
 base::lambda<void()> DeleteAndLeaveHandler(not_null<PeerData*> peer);
 
-void ShowForwardMessagesBox(
+QPointer<Ui::RpWidget> ShowForwardMessagesBox(
 	MessageIdsList &&items,
 	base::lambda_once<void()> &&successCallback = nullptr);