Keep window geometry on confcall migration.

Telegram/SourceFiles/calls/calls_instance.cpp

@@ -236,9 +236,12 @@ void Instance::startOrJoinGroupCall(
 }
 
 void Instance::startOrJoinConferenceCall(StartConferenceInfo args) {
-	destroyCurrentCall(
-		args.migrating ? args.call.get() : nullptr,
-		args.migrating ? args.linkSlug : QString());
+	const auto migrationInfo = (args.migrating && _currentCallPanel)
+		? _currentCallPanel->migrationInfo()
+		: ConferencePanelMigration();
+	if (!args.migrating) {
+		destroyCurrentCall();
+	}
 
 	const auto session = &args.call->peer()->session();
 	auto call = std::make_unique<GroupCall>(_delegate.get(), args);
@@ -249,7 +252,9 @@ void Instance::startOrJoinConferenceCall(StartConferenceInfo args) {
 		destroyGroupCall(raw);
 	}, raw->lifetime());
 
-	_currentGroupCallPanel = std::make_unique<Group::Panel>(raw);
+	_currentGroupCallPanel = std::make_unique<Group::Panel>(
+		raw,
+		migrationInfo);
 	_currentGroupCall = std::move(call);
 	_currentGroupCallChanges.fire_copy(raw);
 	if (!args.invite.empty()) {
@@ -257,6 +262,10 @@ void Instance::startOrJoinConferenceCall(StartConferenceInfo args) {
 	} else if (args.sharingLink && !args.linkSlug.isEmpty()) {
 		_currentGroupCallPanel->migrationShowShareLink();
 	}
+
+	if (args.migrating) {
+		destroyCurrentCall(args.call.get(), args.linkSlug);
+	}
 }
 
 void Instance::confirmLeaveCurrent(
@@ -740,9 +749,11 @@ void Instance::destroyCurrentCall(
 		}
 	}
 	if (const auto current = currentGroupCall()) {
-		current->hangup();
-		if (const auto still = currentGroupCall()) {
-			destroyGroupCall(still);
+		if (!migrateCall || current->lookupReal() != migrateCall) {
+			current->hangup();
+			if (const auto still = currentGroupCall()) {
+				destroyGroupCall(still);
+			}
 		}
 	}
 }

Telegram/SourceFiles/calls/calls_panel.cpp

@@ -233,6 +233,14 @@ bool Panel::isActive() const {
 	return window()->isActiveWindow() && isVisible();
 }
 
+ConferencePanelMigration Panel::migrationInfo() const {
+	const auto handle = window()->windowHandle();
+	return handle ? ConferencePanelMigration{
+		.screen = handle->screen(),
+		.geometry = window()->geometry(),
+	} : ConferencePanelMigration();
+}
+
 base::weak_ptr<Ui::Toast::Instance> Panel::showToast(
 		const QString &text,
 		crl::time duration) {

Telegram/SourceFiles/calls/calls_panel.h

@@ -68,6 +68,7 @@ class Userpic;
 class SignalBars;
 class VideoBubble;
 struct DeviceSelection;
+struct ConferencePanelMigration;
 
 class Panel final
 	: public base::has_weak_ptr
@@ -81,6 +82,8 @@ public:
 	[[nodiscard]] bool isVisible() const;
 	[[nodiscard]] bool isActive() const;
 
+	[[nodiscard]] ConferencePanelMigration migrationInfo() const;
+
 	base::weak_ptr<Ui::Toast::Instance> showToast(
 		const QString &text,
 		crl::time duration = 0);

Telegram/SourceFiles/calls/group/calls_group_common.h

@@ -71,6 +71,11 @@ struct StartConferenceInfo {
 	QString videoCaptureScreenId;
 };
 
+struct ConferencePanelMigration {
+	QScreen *screen = nullptr;
+	QRect geometry;
+};
+
 } // namespace Calls
 
 namespace Calls::Group {

Telegram/SourceFiles/calls/group/calls_group_panel.cpp

@@ -191,6 +191,10 @@ struct Panel::ControlsBackgroundNarrow {
 };
 
 Panel::Panel(not_null<GroupCall*> call)
+: Panel(call, ConferencePanelMigration()) {
+}
+
+Panel::Panel(not_null<GroupCall*> call, ConferencePanelMigration info)
 : _call(call)
 , _peer(call->peer())
 , _layerBg(std::make_unique<Ui::LayerManager>(widget()))
@@ -253,7 +257,7 @@ Panel::Panel(not_null<GroupCall*> call)
 	initWindow();
 	initWidget();
 	initControls();
-	initLayout();
+	initLayout(info);
 	showAndActivate();
 }
 
@@ -1673,8 +1677,8 @@ void Panel::kickParticipantSure(not_null<PeerData*> participantPeer) {
 	}
 }
 
-void Panel::initLayout() {
-	initGeometry();
+void Panel::initLayout(ConferencePanelMigration info) {
+	initGeometry(info);
 
 #ifndef Q_OS_MAC
 	_controls->wrap.raise();
@@ -1704,22 +1708,32 @@ rpl::lifetime &Panel::lifetime() {
 	return window()->lifetime();
 }
 
-void Panel::initGeometry() {
-	const auto center = Core::App().getPointForCallPanelCenter();
-	const auto width = _call->rtmp()
-		? st::groupCallWidthRtmp
-		: st::groupCallWidth;
-	const auto height = _call->rtmp()
-		? st::groupCallHeightRtmp
-		: st::groupCallHeight;
+void Panel::initGeometry(ConferencePanelMigration info) {
 	const auto minWidth = _call->rtmp()
 		? st::groupCallWidthRtmpMin
 		: st::groupCallWidth;
 	const auto minHeight = _call->rtmp()
 		? st::groupCallHeightRtmpMin
 		: st::groupCallHeight;
-	const auto rect = QRect(0, 0, width, height);
-	window()->setGeometry(rect.translated(center - rect.center()));
+	if (info.screen && !info.geometry.isEmpty()) {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+		window()->setScreen(info.screen);
+#else // Qt >= 6.0.0
+		window()->createWinId();
+		window()->windowHandle()->setScreen(info.screen);
+#endif // Qt < 6.0.0
+		window()->setGeometry(info.geometry);
+	} else {
+		const auto center = Core::App().getPointForCallPanelCenter();
+		const auto width = _call->rtmp()
+			? st::groupCallWidthRtmp
+			: st::groupCallWidth;
+		const auto height = _call->rtmp()
+			? st::groupCallHeightRtmp
+			: st::groupCallHeight;
+		const auto rect = QRect(0, 0, width, height);
+		window()->setGeometry(rect.translated(center - rect.center()));
+	}
 	window()->setMinimumSize({ minWidth, minHeight });
 	window()->show();
 }

Telegram/SourceFiles/calls/group/calls_group_panel.h

@@ -75,6 +75,7 @@ struct CallBodyLayout;
 
 namespace Calls {
 struct InviteRequest;
+struct ConferencePanelMigration;
 } // namespace Calls
 
 namespace Calls::Group {
@@ -90,7 +91,8 @@ class Panel final
 	: public base::has_weak_ptr
 	, private Ui::DesktopCapture::ChooseSourceDelegate {
 public:
-	Panel(not_null<GroupCall*> call);
+	explicit Panel(not_null<GroupCall*> call);
+	Panel(not_null<GroupCall*> call, ConferencePanelMigration info);
 	~Panel();
 
 	[[nodiscard]] not_null<Ui::RpWidget*> widget() const;
@@ -156,8 +158,8 @@ private:
 	void initWidget();
 	void initControls();
 	void initShareAction();
-	void initLayout();
-	void initGeometry();
+	void initLayout(ConferencePanelMigration info);
+	void initGeometry(ConferencePanelMigration info);
 	void setupScheduledLabels(rpl::producer<TimeId> date);
 	void setupMembers();
 	void setupVideo(not_null<Viewport*> viewport);