Add support for showing window menu on Wayland

Telegram/SourceFiles/platform/linux/specific_linux.cpp

@@ -585,6 +585,21 @@ bool StartWaylandResize(QWindow *window, Qt::Edges edges) {
 	return false;
 }
 
+bool ShowWaylandWindowMenu(QWindow *window) {
+#if QT_VERSION >= QT_VERSION_CHECK(5, 13, 0) || defined DESKTOP_APP_QT_PATCHED
+	if (const auto waylandWindow = static_cast<QWaylandWindow*>(
+		window->handle())) {
+		if (const auto seat = waylandWindow->display()->lastInputDevice()) {
+			if (const auto shellSurface = waylandWindow->shellSurface()) {
+				return shellSurface->showWindowMenu(seat);
+			}
+		}
+	}
+#endif // Qt >= 5.13 || DESKTOP_APP_QT_PATCHED
+
+	return false;
+}
+
 Window::Control GtkKeywordToWindowControl(const QString &keyword) {
 	if (keyword == qstr("minimize")) {
 		return Window::Control::Minimize;
@@ -956,6 +971,14 @@ bool StartSystemResize(QWindow *window, Qt::Edges edges) {
 	}
 }
 
+bool ShowWindowMenu(QWindow *window) {
+	if (IsWayland()) {
+		return ShowWaylandWindowMenu(window);
+	}
+
+	return false;
+}
+
 Window::ControlsLayout WindowControlsLayout() {
 #ifndef TDESKTOP_DISABLE_GTK_INTEGRATION
 	if (Libs::GtkSettingSupported()

Telegram/SourceFiles/platform/mac/specific_mac.h

@@ -38,6 +38,10 @@ inline bool StartSystemResize(QWindow *window, Qt::Edges edges) {
 	return false;
 }
 
+inline bool ShowWindowMenu(QWindow *window) {
+	return false;
+}
+
 inline bool AutostartSupported() {
 	return false;
 }

Telegram/SourceFiles/platform/platform_specific.h

@@ -54,6 +54,7 @@ bool TrayIconSupported();
 QImage GetImageFromClipboard();
 bool StartSystemMove(QWindow *window);
 bool StartSystemResize(QWindow *window, Qt::Edges edges);
+bool ShowWindowMenu(QWindow *window);
 Window::ControlsLayout WindowControlsLayout();
 
 namespace ThirdParty {

Telegram/SourceFiles/platform/win/specific_win.cpp

@@ -418,6 +418,18 @@ bool AutostartSupported() {
 	return !IsWindowsStoreBuild();
 }
 
+bool ShowWindowMenu(QWindow *window) {
+	const auto pos = QCursor::pos();
+
+	SendMessage(
+		window->winId(),
+		WM_SYSCOMMAND,
+		SC_MOUSEMENU,
+		MAKELPARAM(pos.x(), pos.y()));
+
+	return true;
+}
+
 Window::ControlsLayout WindowControlsLayout() {
 	Window::ControlsLayout controls;
 	controls.right = {

Telegram/SourceFiles/window/window_title_qt.cpp

@@ -189,11 +189,11 @@ void TitleWidgetQt::resizeEvent(QResizeEvent *e) {
 }
 
 void TitleWidgetQt::mousePressEvent(QMouseEvent *e) {
-	if (e->button() != Qt::LeftButton) {
-		return;
-	}
-
+	if (e->button() == Qt::LeftButton) {
 		startMove();
+	} else if (e->button() == Qt::RightButton) {
+		Platform::ShowWindowMenu(window()->windowHandle());
+	}
 }
 
 void TitleWidgetQt::mouseDoubleClickEvent(QMouseEvent *e) {