Destroy boxes in Ui::hideLayer().

Telegram/SourceFiles/boxes/add_contact_box.cpp

@@ -412,7 +412,10 @@ void GroupInfoBox::submitName() {
 	}
 }
 
-void GroupInfoBox::createGroup(not_null<PeerListBox*> selectUsersBox, const QString &title, const std::vector<not_null<PeerData*>> &users) {
+void GroupInfoBox::createGroup(
+		not_null<PeerListBox*> selectUsersBox,
+		const QString &title,
+		const std::vector<not_null<PeerData*>> &users) {
 	if (_creationRequestId) return;
 
 	auto inputs = QVector<MTPInputUser>();
@@ -427,7 +430,11 @@ void GroupInfoBox::createGroup(not_null<PeerListBox*> selectUsersBox, const QStr
 	if (inputs.empty()) {
 		return;
 	}
-	_creationRequestId = request(MTPmessages_CreateChat(MTP_vector<MTPInputUser>(inputs), MTP_string(title))).done([this](const MTPUpdates &result) {
+	_creationRequestId = request(MTPmessages_CreateChat(
+		MTP_vector<MTPInputUser>(inputs),
+		MTP_string(title)
+	)).done([=](const MTPUpdates &result) {
+		auto image = _photo->takeResultImage();
 		Ui::hideLayer();
 
 		App::main()->sentUpdatesReceived(result);
@@ -440,28 +447,30 @@ void GroupInfoBox::createGroup(not_null<PeerListBox*> selectUsersBox, const QStr
 				case mtpc_updatesCombined:
 					return &updates->c_updatesCombined().vchats.v;
 				}
-				LOG(("API Error: unexpected update cons %1 (GroupInfoBox::creationDone)").arg(updates->type()));
+				LOG(("API Error: unexpected update cons %1 "
+					"(GroupInfoBox::creationDone)").arg(updates->type()));
 				return std::nullopt;
 			}
 			| [](auto chats) {
-				return (!chats->empty() && chats->front().type() == mtpc_chat)
+				return (!chats->empty()
+					&& chats->front().type() == mtpc_chat)
 					? base::make_optional(chats)
 					: std::nullopt;
 			}
 			| [](auto chats) {
 				return App::chat(chats->front().c_chat().vid.v);
 			}
-			| [this](not_null<ChatData*> chat) {
-				auto image = _photo->takeResultImage();
+			| [&](not_null<ChatData*> chat) {
 				if (!image.isNull()) {
 					Auth().api().uploadPeerPhoto(chat, std::move(image));
 				}
 				Ui::showPeerHistory(chat, ShowAtUnreadMsgId);
 			};
 		if (!success) {
-			LOG(("API Error: chat not found in updates (ContactsBox::creationDone)"));
+			LOG(("API Error: chat not found in updates "
+				"(ContactsBox::creationDone)"));
 		}
-	}).fail([this, selectUsersBox](const RPCError &error) {
+	}).fail([=](const RPCError &error) {
 		_creationRequestId = 0;
 		if (error.type() == qstr("NO_CHAT_TITLE")) {
 			auto weak = make_weak(this);

Telegram/SourceFiles/boxes/confirm_box.cpp

@@ -27,6 +27,37 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "auth_session.h"
 #include "observer_peer.h"
 
+namespace {
+
+void ConvertToSupergroupDone(const MTPUpdates &updates) {
+	App::main()->sentUpdatesReceived(updates);
+
+	auto handleChats = [](const MTPVector<MTPChat> &chats) {
+		for (const auto &chat : chats.v) {
+			if (chat.type() == mtpc_channel) {
+				const auto channel = App::channel(chat.c_channel().vid.v);
+				Ui::showPeerHistory(channel, ShowAtUnreadMsgId);
+				Auth().api().requestParticipantsCountDelayed(channel);
+			}
+		}
+	};
+
+	switch (updates.type()) {
+	case mtpc_updates:
+		handleChats(updates.c_updates().vchats);
+		break;
+	case mtpc_updatesCombined:
+		handleChats(updates.c_updatesCombined().vchats);
+		break;
+	default:
+		LOG(("API Error: unexpected update cons %1 "
+			"(ConvertToSupergroupBox::convertDone)").arg(updates.type()));
+		break;
+	}
+}
+
+} // namespace
+
 TextParseOptions _confirmBoxTextOptions = {
 	TextParseLinks | TextParseMultiline | TextParseRichText, // flags
 	0, // maxw
@@ -138,8 +169,10 @@ void ConfirmBox::prepare() {
 	}
 
 	boxClosing() | rpl::start_with_next([=] {
-		if (!_confirmed && (!_strictCancel || _cancelled) && _cancelledCallback) {
-			_cancelledCallback();
+		if (!_confirmed && (!_strictCancel || _cancelled)) {
+			if (auto callback = std::move(_cancelledCallback)) {
+				callback();
+			}
 		}
 	}, lifetime());
 
@@ -167,8 +200,8 @@ void ConfirmBox::textUpdated() {
 void ConfirmBox::confirmed() {
 	if (!_confirmed) {
 		_confirmed = true;
-		if (_confirmedCallback) {
-			_confirmedCallback();
+		if (auto callback = std::move(_confirmedCallback)) {
+			callback();
 		}
 	}
 }
@@ -188,11 +221,12 @@ void ConfirmBox::mousePressEvent(QMouseEvent *e) {
 void ConfirmBox::mouseReleaseEvent(QMouseEvent *e) {
 	_lastMousePos = e->globalPos();
 	updateHover();
-	if (auto activated = ClickHandler::unpressed()) {
+	if (const auto activated = ClickHandler::unpressed()) {
 		Ui::hideLayer();
 		App::activateClickHandler(activated, e->button());
+		return;
 	}
-	return BoxContent::mouseReleaseEvent(e);
+	BoxContent::mouseReleaseEvent(e);
 }
 
 void ConfirmBox::leaveEventHook(QEvent *e) {
@@ -359,23 +393,7 @@ void ConvertToSupergroupBox::convertToSupergroup() {
 
 void ConvertToSupergroupBox::convertDone(const MTPUpdates &updates) {
 	Ui::hideLayer();
-	App::main()->sentUpdatesReceived(updates);
-
-	auto handleChats = [](auto &mtpChats) {
-		for_const (auto &mtpChat, mtpChats.v) {
-			if (mtpChat.type() == mtpc_channel) {
-				const auto channel = App::channel(mtpChat.c_channel().vid.v);
-				Ui::showPeerHistory(channel, ShowAtUnreadMsgId);
-				Auth().api().requestParticipantsCountDelayed(channel);
-			}
-		}
-	};
-
-	switch (updates.type()) {
-	case mtpc_updates: handleChats(updates.c_updates().vchats); break;
-	case mtpc_updatesCombined: handleChats(updates.c_updatesCombined().vchats); break;
-	default: LOG(("API Error: unexpected update cons %1 (ConvertToSupergroupBox::convertDone)").arg(updates.type())); break;
-	}
+	ConvertToSupergroupDone(updates);
 }
 
 bool ConvertToSupergroupBox::convertFail(const RPCError &error) {

Telegram/SourceFiles/boxes/peer_list_controllers.cpp

@@ -42,6 +42,61 @@ base::flat_set<not_null<UserData*>> GetAlreadyInFromPeer(PeerData *peer) {
 	return {};
 }
 
+void ShareBotGame(not_null<UserData*> bot, not_null<PeerData*> chat) {
+	const auto history = App::historyLoaded(chat);
+	const auto randomId = rand_value<uint64>();
+	const auto requestId = MTP::send(
+		MTPmessages_SendMedia(
+			MTP_flags(0),
+			chat->input,
+			MTP_int(0),
+			MTP_inputMediaGame(
+				MTP_inputGameShortName(
+					bot->inputUser,
+					MTP_string(bot->botInfo->shareGameShortName))),
+			MTP_string(""),
+			MTP_long(randomId),
+			MTPnullMarkup,
+			MTPnullEntities),
+		App::main()->rpcDone(&MainWidget::sentUpdatesReceived),
+		App::main()->rpcFail(&MainWidget::sendMessageFail),
+		0,
+		0,
+		history ? history->sendRequestId : 0);
+	if (history) {
+		history->sendRequestId = requestId;
+	}
+	Ui::hideLayer();
+	Ui::showPeerHistory(chat, ShowAtUnreadMsgId);
+}
+
+void AddBotToGroup(not_null<UserData*> bot, not_null<PeerData*> chat) {
+	if (auto &info = bot->botInfo) {
+		if (!info->startGroupToken.isEmpty()) {
+			MTP::send(
+				MTPmessages_StartBot(
+					bot->inputUser,
+					chat->input,
+					MTP_long(rand_value<uint64>()),
+					MTP_string(info->startGroupToken)),
+				App::main()->rpcDone(&MainWidget::sentUpdatesReceived),
+				App::main()->rpcFail(
+					&MainWidget::addParticipantFail,
+					{ bot, chat }));
+		} else {
+			App::main()->addParticipants(
+				chat,
+				{ 1, bot });
+		}
+	} else {
+		App::main()->addParticipants(
+			chat,
+			{ 1, bot });
+	}
+	Ui::hideLayer();
+	Ui::showPeerHistory(chat, ShowAtUnreadMsgId);
+}
+
 } // namespace
 
 // Not used for now.
@@ -751,36 +806,9 @@ void AddBotToGroupBoxController::rowClicked(not_null<PeerListRow*> row) {
 }
 
 void AddBotToGroupBoxController::shareBotGame(not_null<PeerData*> chat) {
-	auto send = [weak = base::make_weak(this), bot = _bot, chat] {
-		if (!weak) {
-			return;
-		}
-		const auto history = App::historyLoaded(chat);
-		const auto randomId = rand_value<uint64>();
-		const auto requestId = MTP::send(
-			MTPmessages_SendMedia(
-				MTP_flags(0),
-				chat->input,
-				MTP_int(0),
-				MTP_inputMediaGame(
-					MTP_inputGameShortName(
-						bot->inputUser,
-						MTP_string(bot->botInfo->shareGameShortName))),
-				MTP_string(""),
-				MTP_long(randomId),
-				MTPnullMarkup,
-				MTPnullEntities),
-			App::main()->rpcDone(&MainWidget::sentUpdatesReceived),
-			App::main()->rpcFail(&MainWidget::sendMessageFail),
-			0,
-			0,
-			history ? history->sendRequestId : 0);
-		if (history) {
-			history->sendRequestId = requestId;
-		}
-		Ui::hideLayer();
-		Ui::showPeerHistory(chat, ShowAtUnreadMsgId);
-	};
+	auto send = crl::guard(this, [bot = _bot, chat] {
+		ShareBotGame(bot, chat);
+	});
 	auto confirmText = [chat] {
 		if (chat->isUser()) {
 			return lng_bot_sure_share_game(lt_user, App::peerName(chat));
@@ -801,35 +829,9 @@ void AddBotToGroupBoxController::addBotToGroup(not_null<PeerData*> chat) {
 			return;
 		}
 	}
-	auto send = [weak = base::make_weak(this), bot = _bot, chat] {
-		if (!weak) {
-			return;
-		}
-		if (auto &info = bot->botInfo) {
-			if (!info->startGroupToken.isEmpty()) {
-				MTP::send(
-					MTPmessages_StartBot(
-						bot->inputUser,
-						chat->input,
-						MTP_long(rand_value<uint64>()),
-						MTP_string(info->startGroupToken)),
-					App::main()->rpcDone(&MainWidget::sentUpdatesReceived),
-					App::main()->rpcFail(
-						&MainWidget::addParticipantFail,
-						{ bot, chat }));
-			} else {
-				App::main()->addParticipants(
-					chat,
-					{ 1, bot });
-			}
-		} else {
-			App::main()->addParticipants(
-				chat,
-				{ 1, bot });
-		}
-		Ui::hideLayer();
-		Ui::showPeerHistory(chat, ShowAtUnreadMsgId);
-	};
+	auto send = crl::guard(this, [bot = _bot, chat] {
+		AddBotToGroup(bot, chat);
+	});
 	auto confirmText = lng_bot_sure_invite(lt_group, chat->name);
 	Ui::show(
 		Box<ConfirmBox>(confirmText, send),

Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp

@@ -124,6 +124,7 @@ private:
 	void submitTitle();
 	void submitDescription();
 	void deleteWithConfirmation();
+	void deleteChannel();
 	void privacyChanged(Privacy value);
 
 	void checkUsernameAvailability();
@@ -1404,23 +1405,15 @@ void Controller::savePhoto() {
 }
 
 void Controller::deleteWithConfirmation() {
-	auto channel = _peer->asChannel();
+	const auto channel = _peer->asChannel();
 	Assert(channel != nullptr);
 
 	auto text = lang(_isGroup
 		? lng_sure_delete_group
 		: lng_sure_delete_channel);
-	auto deleteCallback = [=] {
-		Ui::hideLayer();
-		Ui::showChatsList();
-		if (auto chat = channel->migrateFrom()) {
-			App::main()->deleteAndExit(chat);
-		}
-		MTP::send(
-			MTPchannels_DeleteChannel(channel->inputChannel),
-			App::main()->rpcDone(&MainWidget::sentUpdatesReceived),
-			App::main()->rpcFail(&MainWidget::deleteChannelFailed));
-	};
+	auto deleteCallback = crl::guard(this, [=] {
+		deleteChannel();
+	});
 	Ui::show(Box<ConfirmBox>(
 		text,
 		lang(lng_box_delete),
@@ -1428,6 +1421,21 @@ void Controller::deleteWithConfirmation() {
 		std::move(deleteCallback)), LayerOption::KeepOther);
 }
 
+void Controller::deleteChannel() {
+	const auto channel = _peer->asChannel();
+	const auto chat = channel->migrateFrom();
+
+	Ui::hideLayer();
+	Ui::showChatsList();
+	if (chat) {
+		App::main()->deleteAndExit(chat);
+	}
+	MTP::send(
+		MTPchannels_DeleteChannel(channel->inputChannel),
+		App::main()->rpcDone(&MainWidget::sentUpdatesReceived),
+		App::main()->rpcFail(&MainWidget::deleteChannelFailed));
+}
+
 } // namespace
 
 EditPeerInfoBox::EditPeerInfoBox(

Telegram/SourceFiles/chat_helpers/stickers_list_widget.cpp

@@ -2361,6 +2361,7 @@ void StickersListWidget::removeMegagroupSet(bool locally) {
 	_removingSetId = Stickers::MegagroupSetId;
 	Ui::show(Box<ConfirmBox>(lang(lng_stickers_remove_group_set), crl::guard(this, [this, group = _megagroupSet] {
 		Expects(group->mgInfo != nullptr);
+
 		if (group->mgInfo->stickerSet.type() != mtpc_inputStickerSetEmpty) {
 			Auth().api().setGroupStickerSet(group, MTP_inputStickerSetEmpty());
 		}

Telegram/SourceFiles/dialogs/dialogs_search_from_controllers.cpp

@@ -76,7 +76,9 @@ void ChatSearchFromController::prepare() {
 
 void ChatSearchFromController::rowClicked(not_null<PeerListRow*> row) {
 	Expects(row->peer()->isUser());
-	_callback(row->peer()->asUser());
+
+	const auto onstack = _callback;
+	onstack(row->peer()->asUser());
 }
 
 void ChatSearchFromController::rebuildRows() {
@@ -143,7 +145,9 @@ void ChannelSearchFromController::prepare() {
 
 void ChannelSearchFromController::rowClicked(not_null<PeerListRow*> row) {
 	Expects(row->peer()->isUser());
-	_callback(row->peer()->asUser());
+
+	const auto onstack = _callback;
+	onstack(row->peer()->asUser());
 }
 
 std::unique_ptr<PeerListRow> ChannelSearchFromController::createRow(not_null<UserData*> user) const {

Telegram/SourceFiles/dialogs/dialogs_widget.cpp

@@ -1199,13 +1199,12 @@ void DialogsWidget::showSearchFrom() {
 		Dialogs::ShowSearchFromBox(
 			controller(),
 			peer,
-			crl::guard(this, [=](
-					not_null<UserData*> user) {
+			crl::guard(this, [=](not_null<UserData*> user) {
 				Ui::hideLayer();
 				setSearchInChat(chat, user);
 				onFilterUpdate(true);
 			}),
-			crl::guard(this, [this] { _filter->setFocus(); }));
+			crl::guard(this, [=] { _filter->setFocus(); }));
 	}
 }
 

Telegram/SourceFiles/facades.cpp

@@ -217,12 +217,6 @@ void showMediaPreview(Data::FileOrigin origin, not_null<PhotoData*> photo) {
 	}
 }
 
-void hideMediaPreview() {
-	if (auto w = App::wnd()) {
-		w->ui_hideMediaPreview();
-	}
-}
-
 void hideLayer(anim::type animated) {
 	if (auto w = App::wnd()) {
 		w->ui_showBox(

Telegram/SourceFiles/facades.h

@@ -102,7 +102,6 @@ void showMediaPreview(
 	Data::FileOrigin origin,
 	not_null<DocumentData*> document);
 void showMediaPreview(Data::FileOrigin origin, not_null<PhotoData*> photo);
-void hideMediaPreview();
 
 template <typename BoxType>
 QPointer<BoxType> show(

Telegram/SourceFiles/info/info_wrap_widget.cpp

@@ -403,9 +403,8 @@ void WrapWidget::createTopBar() {
 
 void WrapWidget::checkBeforeClose(Fn<void()> close) {
 	const auto confirmed = [=] {
-		const auto copy = close;
 		Ui::hideLayer();
-		copy();
+		close();
 	};
 	if (_controller->canSaveChangesNow()) {
 		Ui::show(Box<ConfirmBox>(

Telegram/SourceFiles/mainwindow.cpp

@@ -385,8 +385,10 @@ void MainWindow::ui_showMediaPreview(
 	_mediaPreview->showPreview(origin, photo);
 }
 
-void MainWindow::ui_hideMediaPreview() {
-	if (!_mediaPreview) return;
+void MainWindow::hideMediaPreview() {
+	if (!_mediaPreview) {
+		return;
+	}
 	_mediaPreview->hidePreview();
 }
 
@@ -484,12 +486,12 @@ bool MainWindow::eventFilter(QObject *object, QEvent *e) {
 	} break;
 
 	case QEvent::MouseButtonRelease: {
-		Ui::hideMediaPreview();
+		hideMediaPreview();
 	} break;
 
 	case QEvent::ApplicationActivate: {
 		if (object == QCoreApplication::instance()) {
-			InvokeQueued(this, [this] {
+			InvokeQueued(this, [=] {
 				handleActiveChanged();
 			});
 		}

Telegram/SourceFiles/mainwindow.h

@@ -116,7 +116,6 @@ public:
 	void ui_showMediaPreview(
 		Data::FileOrigin origin,
 		not_null<PhotoData*> photo);
-	void ui_hideMediaPreview();
 
 protected:
 	bool eventFilter(QObject *o, QEvent *e) override;
@@ -152,6 +151,7 @@ signals:
 private:
 	[[nodiscard]] bool skipTrayClick() const;
 
+	void hideMediaPreview();
 	void ensureLayerCreated();
 	void destroyLayer();
 

Telegram/SourceFiles/platform/linux/file_utilities_linux.cpp

@@ -49,7 +49,8 @@ QByteArray EscapeShell(const QByteArray &content) {
 } // namespace internal
 
 void UnsafeShowInFolder(const QString &filepath) {
-	Ui::hideLayer(anim::type::instant); // Hide mediaview to make other apps visible.
+	// Hide mediaview to make other apps visible.
+	Ui::hideLayer(anim::type::instant);
 
 	auto absolutePath = QFileInfo(filepath).absoluteFilePath();
 	QProcess process;

Telegram/SourceFiles/window/layer_widget.cpp

@@ -457,21 +457,28 @@ void LayerStackWidget::setCacheImages() {
 	_background->setCacheImages(std::move(bodyCache), std::move(mainMenuCache), std::move(specialLayerCache), std::move(layerCache));
 }
 
-void LayerStackWidget::onLayerClosed(LayerWidget *layer) {
-	if (!layer->setClosing()) {
+void LayerStackWidget::closeLayer(not_null<LayerWidget*> layer) {
+	const auto weak = make_weak(layer.get());
+	if (weak->inFocusChain()) {
+		setFocus();
+	}
+	if (!weak || !weak->setClosing()) {
 		// This layer is already closing.
 		return;
+	} else if (!weak) {
+		// setClosing() could've killed the layer.
+		return;
 	}
-	layer->deleteLater();
+
 	if (layer == _specialLayer) {
 		hideAll(anim::type::normal);
 	} else if (layer == currentLayer()) {
 		if (_layers.size() == 1) {
 			hideCurrent(anim::type::normal);
 		} else {
-			if (layer->inFocusChain()) setFocus();
-			layer->hide();
+			auto taken = std::move(_layers.back());
 			_layers.pop_back();
+
 			layer = currentLayer();
 			layer->parentResized();
 			if (!_background->animating()) {
@@ -481,7 +488,7 @@ void LayerStackWidget::onLayerClosed(LayerWidget *layer) {
 		}
 	} else {
 		for (auto i = _layers.begin(), e = _layers.end(); i != e; ++i) {
-			if (layer == *i) {
+			if (layer == i->get()) {
 				_layers.erase(i);
 				break;
 			}
@@ -489,10 +496,6 @@ void LayerStackWidget::onLayerClosed(LayerWidget *layer) {
 	}
 }
 
-void LayerStackWidget::onLayerResized() {
-	updateLayerBoxes();
-}
-
 void LayerStackWidget::updateLayerBoxes() {
 	auto getLayerBox = [this]() {
 		if (auto layer = currentLayer()) {
@@ -594,15 +597,15 @@ void LayerStackWidget::showBox(
 void LayerStackWidget::replaceBox(
 		object_ptr<BoxContent> box,
 		anim::type animated) {
-	auto pointer = pushBox(std::move(box), animated);
-	while (!_layers.isEmpty() && _layers.front() != pointer) {
-		auto removingLayer = _layers.front();
-		_layers.pop_front();
+	const auto pointer = pushBox(std::move(box), animated);
+	while (!_layers.empty() && _layers.front().get() != pointer) {
+		auto removingLayer = std::move(_layers.front());
+		_layers.erase(begin(_layers));
 
+		if (removingLayer->inFocusChain()) {
+			setFocus();
+		}
 		removingLayer->setClosing();
-		if (removingLayer->inFocusChain()) setFocus();
-		removingLayer->hide();
-		removingLayer->deleteLater();
 	}
 }
 
@@ -616,7 +619,7 @@ void LayerStackWidget::prepareForAnimation() {
 	if (_specialLayer) {
 		_specialLayer->hide();
 	}
-	if (auto layer = currentLayer()) {
+	if (const auto layer = currentLayer()) {
 		layer->hide();
 	}
 }
@@ -717,15 +720,13 @@ LayerWidget *LayerStackWidget::pushBox(
 		if (oldLayer->inFocusChain()) setFocus();
 		oldLayer->hide();
 	}
-	auto layer = object_ptr<AbstractBox>(
-		this,
-		std::move(box));
-	_layers.push_back(layer);
-	initChildLayer(layer);
+	_layers.push_back(std::make_unique<AbstractBox>(this, std::move(box)));
+	const auto raw = _layers.back().get();
+	initChildLayer(raw);
 
 	if (_layers.size() > 1) {
 		if (!_background->animating()) {
-			layer->setVisible(true);
+			raw->setVisible(true);
 			showFinished();
 		}
 	} else {
@@ -734,7 +735,7 @@ LayerWidget *LayerStackWidget::pushBox(
 		}, Action::ShowLayer, animated);
 	}
 
-	return layer.data();
+	return raw;
 }
 
 void LayerStackWidget::prependBox(
@@ -744,10 +745,12 @@ void LayerStackWidget::prependBox(
 		replaceBox(std::move(box), animated);
 		return;
 	}
-	auto layer = object_ptr<AbstractBox>(this, std::move(box));
-	layer->hide();
-	_layers.push_front(layer);
-	initChildLayer(layer);
+	_layers.insert(
+		begin(_layers),
+		std::make_unique<AbstractBox>(this, std::move(box)));
+	const auto raw = _layers.front().get();
+	raw->hide();
+	initChildLayer(raw);
 }
 
 bool LayerStackWidget::takeToThirdSection() {
@@ -757,11 +760,11 @@ bool LayerStackWidget::takeToThirdSection() {
 }
 
 void LayerStackWidget::clearLayers() {
-	for (auto layer : base::take(_layers)) {
+	for (auto &layer : base::take(_layers)) {
+		if (layer->inFocusChain()) {
+			setFocus();
+		}
 		layer->setClosing();
-		if (layer->inFocusChain()) setFocus();
-		layer->hide();
-		layer->deleteLater();
 	}
 }
 
@@ -774,9 +777,8 @@ void LayerStackWidget::clearSpecialLayer() {
 
 void LayerStackWidget::initChildLayer(LayerWidget *layer) {
 	layer->setParent(this);
-	layer->setClosedCallback([this, layer] { onLayerClosed(layer); });
-	layer->setResizedCallback([this] { onLayerResized(); });
-	connect(layer, SIGNAL(destroyed(QObject*)), this, SLOT(onLayerDestroyed(QObject*)));
+	layer->setClosedCallback([=] { closeLayer(layer); });
+	layer->setResizedCallback([=] { updateLayerBoxes(); });
 	Ui::SendPendingMoveResizeEvents(layer);
 	layer->parentResized();
 }
@@ -797,41 +799,7 @@ void LayerStackWidget::sendFakeMouseEvent() {
 	sendSynteticMouseEvent(this, QEvent::MouseMove, Qt::NoButton);
 }
 
-void LayerStackWidget::onLayerDestroyed(QObject *obj) {
-	if (obj == _specialLayer) {
-		_specialLayer = nullptr;
-		hideAll(anim::type::normal);
-	} else if (obj == currentLayer()) {
-		_layers.pop_back();
-		if (auto newLayer = currentLayer()) {
-			newLayer->parentResized();
-			if (!_background->animating()) {
-				newLayer->show();
-				showFinished();
-			}
-		} else if (!_specialLayer) {
-			hideAll(anim::type::normal);
-		}
-	} else {
-		for (auto i = _layers.begin(), e = _layers.end(); i != e; ++i) {
-			if (obj == *i) {
-				_layers.erase(i);
-				break;
-			}
-		}
-	}
-}
-
-LayerStackWidget::~LayerStackWidget() {
-	// We must destroy all layers before we destroy LayerStackWidget.
-	// Some layers in destructor call layer-related methods, like hiding
-	// other layers, that call methods of LayerStackWidget and access
-	// its fields, so if it is destroyed already everything crashes.
-	for (auto layer : base::take(_layers)) {
-		layer->hide();
-		delete layer;
-	}
-}
+LayerStackWidget::~LayerStackWidget() = default;
 
 } // namespace Window
 

Telegram/SourceFiles/window/layer_widget.h

@@ -55,8 +55,8 @@ public:
 
 protected:
 	void closeLayer() {
-		if (_closedCallback) {
-			_closedCallback();
+		if (const auto callback = base::take(_closedCallback)) {
+			callback();
 		}
 	}
 	void mousePressEvent(QMouseEvent *e) override {
@@ -81,8 +81,6 @@ private:
 };
 
 class LayerStackWidget : public Ui::RpWidget {
-	Q_OBJECT
-
 public:
 	LayerStackWidget(QWidget *parent);
 
@@ -126,11 +124,6 @@ protected:
 	void mousePressEvent(QMouseEvent *e) override;
 	void resizeEvent(QResizeEvent *e) override;
 
-private slots:
-	void onLayerDestroyed(QObject *obj);
-	void onLayerClosed(LayerWidget *layer);
-	void onLayerResized();
-
 private:
 	void appendBox(
 		object_ptr<BoxContent> box,
@@ -147,6 +140,7 @@ private:
 		anim::type animated);
 	void showFinished();
 	void hideCurrent(anim::type animated);
+	void closeLayer(not_null<LayerWidget*> layer);
 
 	enum class Action {
 		ShowMainMenu,
@@ -175,13 +169,13 @@ private:
 	void sendFakeMouseEvent();
 
 	LayerWidget *currentLayer() {
-		return _layers.empty() ? nullptr : _layers.back();
+		return _layers.empty() ? nullptr : _layers.back().get();
 	}
 	const LayerWidget *currentLayer() const {
 		return const_cast<LayerStackWidget*>(this)->currentLayer();
 	}
 
-	QList<LayerWidget*> _layers;
+	std::vector<std::unique_ptr<LayerWidget>> _layers;
 
 	object_ptr<LayerWidget> _specialLayer = { nullptr };
 	object_ptr<MainMenu> _mainMenu = { nullptr };