Confirm export stop on quit and logout.

Telegram/SourceFiles/app.cpp

@@ -17,6 +17,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "styles/style_history.h"
 #include "styles/style_boxes.h"
 #include "lang/lang_keys.h"
+#include "boxes/confirm_box.h"
 #include "data/data_abstract_structure.h"
 #include "data/data_media_types.h"
 #include "data/data_session.h"
@@ -1589,7 +1590,13 @@ namespace App {
 	}
 
 	void quit() {
-		if (quitting()) return;
+		if (quitting()) {
+			return;
+		} else if (AuthSession::Exists()
+			&& Auth().data().exportInProgress()) {
+			Auth().data().stopExportWithConfirmation([] { App::quit(); });
+			return;
+		}
 		setLaunchState(QuitRequested);
 
 		if (auto window = wnd()) {

Telegram/SourceFiles/data/data_session.cpp

@@ -79,7 +79,7 @@ void Session::startExport() {
 
 	_exportPanel->closed(
 	) | rpl::start_with_next([=] {
-		clearExport();
+		stopExport();
 	}, _export->lifetime());
 }
 
@@ -88,7 +88,26 @@ rpl::producer<Export::View::PanelController*> Session::currentExportView(
 	return _exportViewChanges.events_starting_with(_exportPanel.get());
 }
 
-void Session::clearExport() {
+bool Session::exportInProgress() const {
+	return _export != nullptr;
+}
+
+void Session::stopExportWithConfirmation(FnMut<void()> callback) {
+	if (!_exportPanel) {
+		callback();
+		return;
+	}
+	auto closeAndCall = [=, callback = std::move(callback)]() mutable {
+		auto saved = std::move(callback);
+		stopExport();
+		if (saved) {
+			saved();
+		}
+	};
+	_exportPanel->stopWithConfirmation(std::move(closeAndCall));
+}
+
+void Session::stopExport() {
 	if (_exportPanel) {
 		_exportPanel = nullptr;
 		_exportViewChanges.fire(nullptr);

Telegram/SourceFiles/data/data_session.h

@@ -53,6 +53,9 @@ public:
 
 	void startExport();
 	rpl::producer<Export::View::PanelController*> currentExportView() const;
+	bool exportInProgress() const;
+	void stopExportWithConfirmation(FnMut<void()> callback);
+	void stopExport();
 
 	[[nodiscard]] base::Variable<bool> &contactsLoaded() {
 		return _contactsLoaded;
@@ -405,8 +408,6 @@ public:
 	}
 
 private:
-	void clearExport();
-
 	void setupContactViewsViewer();
 	void setupChannelLeavingViewer();
 	void photoApplyFields(

Telegram/SourceFiles/export/view/export_view_panel_controller.cpp

@@ -118,16 +118,37 @@ void PanelController::showProgress() {
 	_panel->setHideOnDeactivate(true);
 }
 
-void PanelController::stopWithConfirmation() {
+void PanelController::stopWithConfirmation(FnMut<void()> callback) {
+	if (!_state.is<ProcessingState>()) {
+		stopExport();
+		callback();
+		return;
+	}
+	auto stop = [=, callback = std::move(callback)]() mutable {
+		auto saved = std::move(callback);
+		stopExport();
+		if (saved) {
+			saved();
+		}
+	};
+	const auto hidden = _panel->isHidden();
+	const auto old = _confirmStopBox;
 	auto box = Box<ConfirmBox>(
 		lang(lng_export_sure_stop),
 		lang(lng_export_stop),
 		st::attentionBoxButton,
-		[=] { stopExport(); });
+		std::move(stop));
+	_confirmStopBox = box.data();
 	_panel->showBox(
 		std::move(box),
-		LayerOption::KeepOther,
-		anim::type::normal);
+		LayerOption::CloseOther,
+		hidden ? anim::type::instant : anim::type::normal);
+	if (hidden) {
+		_panel->showAndActivate();
+	}
+	if (old) {
+		old->closeBox();
+	}
 }
 
 void PanelController::stopExport() {

Telegram/SourceFiles/export/view/export_view_panel_controller.h

@@ -11,6 +11,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "export/view/export_view_content.h"
 #include "base/unique_qptr.h"
 
+class BoxContent;
+
 namespace Ui {
 class SeparatePanel;
 } // namespace Ui
@@ -25,7 +27,7 @@ public:
 	PanelController(not_null<ControllerWrap*> process);
 
 	void activatePanel();
-	void stopWithConfirmation();
+	void stopWithConfirmation(FnMut<void()> callback = nullptr);
 
 	rpl::producer<> closed() const;
 
@@ -54,6 +56,7 @@ private:
 	base::unique_qptr<Ui::SeparatePanel> _panel;
 
 	State _state;
+	QPointer<BoxContent> _confirmStopBox;
 	rpl::event_stream<rpl::producer<>> _panelCloseEvents;
 	bool _stopRequested = false;
 	rpl::lifetime _lifetime;

Telegram/SourceFiles/mainwindow.cpp

@@ -8,6 +8,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "mainwindow.h"
 
 #include "data/data_document.h"
+#include "data/data_session.h"
 #include "dialogs/dialogs_layout.h"
 #include "styles/style_dialogs.h"
 #include "styles/style_window.h"
@@ -618,11 +619,22 @@ void MainWindow::onLogout() {
 		showFromTray();
 	}
 
+	const auto logout = [] {
+		Messenger::Instance().logOut();
+	};
+	const auto callback = [=] {
+		if (AuthSession::Exists() && Auth().data().exportInProgress()) {
+			Ui::hideLayer();
+			Auth().data().stopExportWithConfirmation(logout);
+		} else {
+			logout();
+		}
+	};
 	Ui::show(Box<ConfirmBox>(
 		lang(lng_sure_logout),
 		lang(lng_settings_logout),
 		st::attentionBoxButton,
-		[] { Messenger::Instance().logOut(); }));
+		callback));
 }
 
 void MainWindow::quitFromTray() {