Migrate from kwayland to QtWaylandScanner

CMakeLists.txt

@@ -289,14 +289,8 @@ elseif(LINUX)
     target_link_libraries(lib_ui
     PUBLIC
         desktop-app::lib_waylandshells
-        desktop-app::external_kwayland
+        desktop-app::external_wayland_client
     )
-
-    if (DESKTOP_APP_USE_PACKAGED)
-        find_package(PkgConfig REQUIRED)
-        pkg_check_modules(WAYLAND_CLIENT REQUIRED IMPORTED_TARGET wayland-client)
-        target_link_libraries(lib_ui PRIVATE PkgConfig::WAYLAND_CLIENT)
-    endif()
 endif()
 
 target_include_directories(lib_ui

ui/platform/linux/ui_linux_wayland_integration.cpp

@@ -8,6 +8,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/platform/linux/ui_linux_wayland_integration.h"
 
 #include "base/platform/base_platform_info.h"
+#include "base/qt_signal_producer.h"
 #include "waylandshells/xdg_shell.h"
 #include "qwayland-xdg-shell.h"
 
@@ -25,48 +26,112 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include <private/qwaylandwindow_p.h>
 #include <private/qwaylandinputdevice_p.h>
 
-#include <connection_thread.h>
-#include <registry.h>
+#include <wayland-client.h>
 
 Q_DECLARE_METATYPE(QMargins);
 
 using QtWaylandClient::QWaylandWindow;
-using namespace KWayland::Client;
 
 namespace Ui {
 namespace Platform {
+namespace {
+
+struct WlRegistryDeleter {
+	void operator()(wl_registry *value) {
+		wl_registry_destroy(value);
+	}
+};
+
+struct WlCallbackDeleter {
+	void operator()(wl_callback *value) {
+		wl_callback_destroy(value);
+	}
+};
+
+} // namespace
 
 struct WaylandIntegration::Private {
-	std::unique_ptr<ConnectionThread> connection;
-	Registry registry;
+	std::unique_ptr<wl_registry, WlRegistryDeleter> registry;
+	std::unique_ptr<wl_callback, WlCallbackDeleter> callback;
 	QEventLoop interfacesLoop;
 	bool interfacesAnnounced = false;
+	bool xdgDecorationSupported = false;
+	uint32_t xdgDecorationName = 0;
+	rpl::lifetime lifetime;
+
+	static const struct wl_registry_listener RegistryListener;
+	static const struct wl_callback_listener CallbackListener;
+};
+
+const struct wl_registry_listener WaylandIntegration::Private::RegistryListener = {
+	decltype(wl_registry_listener::global)(+[](
+			Private *data,
+			wl_registry *registry,
+			uint32_t name,
+			const char *interface,
+			uint32_t version) {
+		if (interface == qstr("zxdg_decoration_manager_v1")) {
+			data->xdgDecorationSupported = true;
+		}
+	}),
+	decltype(wl_registry_listener::global_remove)(+[](
+			Private *data,
+			wl_registry *registry,
+			uint32_t name) {
+		if (name == data->xdgDecorationName) {
+			data->xdgDecorationSupported = false;
+		}
+	}),
+};
+
+const struct wl_callback_listener WaylandIntegration::Private::CallbackListener = {
+	decltype(wl_callback_listener::done)(+[](
+			Private *data,
+			wl_callback *callback,
+			uint32_t serial) {
+		data->interfacesAnnounced = true;
+		if (data->interfacesLoop.isRunning()) {
+			data->interfacesLoop.quit();
+		}
+		data->callback = nullptr;
+	}),
 };
 
 WaylandIntegration::WaylandIntegration()
 : _private(std::make_unique<Private>()) {
-	_private->connection = std::unique_ptr<ConnectionThread>{
-		ConnectionThread::fromApplication(),
-	};
-
-	_private->registry.create(_private->connection.get());
-	_private->registry.setup();
-
-	QObject::connect(
-		_private->connection.get(),
-		&ConnectionThread::connectionDied,
-		&_private->registry,
-		&Registry::destroy);
-
-	QObject::connect(
-		&_private->registry,
-		&Registry::interfacesAnnounced,
-		[=] {
-			_private->interfacesAnnounced = true;
-			if (_private->interfacesLoop.isRunning()) {
-				_private->interfacesLoop.quit();
+	const auto native = QGuiApplication::platformNativeInterface();
+	if (!native) {
+		return;
 	}
-		});
+
+	const auto display = reinterpret_cast<wl_display*>(
+		native->nativeResourceForIntegration(QByteArray("wl_display")));
+
+	if (!display) {
+		return;
+	}
+
+	_private->registry.reset(wl_display_get_registry(display));
+	_private->callback.reset(wl_display_sync(display));
+
+	wl_registry_add_listener(
+		_private->registry.get(),
+		&Private::RegistryListener,
+		_private.get());
+
+	wl_callback_add_listener(
+		_private->callback.get(),
+		&Private::CallbackListener,
+		_private.get());
+
+	base::qt_signal_producer(
+		native,
+		&QObject::destroyed
+	) | rpl::start_with_next([=] {
+		// too late for standard destructors, just free
+		free(_private->callback.release());
+		free(_private->registry.release());
+	}, _private->lifetime);
 }
 
 WaylandIntegration::~WaylandIntegration() = default;
@@ -85,8 +150,7 @@ void WaylandIntegration::waitForInterfaceAnnounce() {
 }
 
 bool WaylandIntegration::xdgDecorationSupported() {
-	return _private->registry.hasInterface(
-		Registry::Interface::XdgDecorationUnstableV1);
+	return _private->xdgDecorationSupported;
 }
 
 bool WaylandIntegration::windowExtentsSupported() {