WIP: Use KWayland to set window geometry

src/gui/windowgeometryguard.cpp

@@ -101,10 +101,18 @@ bool WindowGeometryGuard::eventFilter(QObject *, QEvent *event)
     }
 
     case QEvent::Move:
-    case QEvent::Resize:
+    case QEvent::Resize: {
         if ( !isWindowGeometryLocked() && m_window->isVisible() )
             m_timerSaveGeometry.start();
+
+        QWindow *w = m_window->windowHandle();
+        if (w) {
+            const QRect newGeometry = m_window->geometry();
+            auto platform = platformNativeInterface();
+            platform->setWindowGeometry(w, newGeometry);
+        }
         break;
+    }
 
     case QEvent::Hide:
         if ( isGeometryGuardBlockedUntilHidden(m_window) )

src/platform/dummy/dummyplatform.cpp

@@ -77,3 +77,8 @@ QStringList DummyPlatform::getCommandLineArguments(int argc, char **argv)
 
     return arguments;
 }
+
+void DummyPlatform::setWindowGeometry(QWindow *window, const QRect &windowGeometry)
+{
+    window->setGeometry(windowGeometry);
+}

src/platform/dummy/dummyplatform.h

@@ -46,6 +46,8 @@ class DummyPlatform : public PlatformNativeInterface
     QString translationPrefix() override;
 
     QString themePrefix() override { return QString(); }
+
+    void setWindowGeometry(QWindow *window, const QRect &windowGeometry) override;
 };
 
 #endif // DUMMYPLATFORM_H

src/platform/platformnativeinterface.h

@@ -130,6 +130,8 @@ class PlatformNativeInterface
      */
     virtual QString themePrefix() = 0;
 
+    virtual void setWindowGeometry(QWindow *window, const QRect &windowGeometry) = 0;
+
     PlatformNativeInterface(const PlatformNativeInterface &) = delete;
     PlatformNativeInterface &operator=(const PlatformNativeInterface &) = delete;
 };

src/platform/x11/x11platform.cmake

@@ -51,3 +51,6 @@ include_directories(${CMAKE_CURRENT_BINARY_DIR}/platform/x11/systemclipboard)
 add_subdirectory(platform/x11/systemclipboard)
 set_target_properties(systemclipboard PROPERTIES COMPILE_FLAGS "-Wno-old-style-cast")
 list(APPEND copyq_LIBRARIES systemclipboard)
+
+find_package(KWayland REQUIRED)
+list(APPEND copyq_LIBRARIES Plasma::KWaylandClient)

src/platform/x11/x11platform.cpp

@@ -15,6 +15,12 @@
 #include <QStringList>
 #include <QVariant>
 #include <QWidget>
+#include <QThread>
+
+#include <KWayland/Client/connection_thread.h>
+#include <KWayland/Client/registry.h>
+#include <KWayland/Client/surface.h>
+#include <KWayland/Client/xdgshell.h>
 
 #include "x11platformclipboard.h"
 
@@ -320,6 +326,50 @@ QString X11Platform::translationPrefix()
     return QString();
 }
 
+
+void X11Platform::setWindowGeometry(QWindow *window, const QRect &windowGeometry)
+{
+    using namespace KWayland::Client;
+
+    XdgShellSurface *xdgSurface = window->findChild<XdgShellSurface*>();
+
+    if (!xdgSurface) {
+        if (!m_registry) {
+            ConnectionThread *connection = new ConnectionThread;
+            QThread *thread = new QThread;
+            connection->moveToThread(thread);
+            thread->start();
+
+            QObject::connect(connection, &ConnectionThread::connected, [connection] {
+                qDebug() << "Successfully connected to Wayland server at socket:" << connection->socketName();
+            });
+            QObject::connect(connection, &ConnectionThread::failed, [connection] {
+                qDebug() << "Failed to connect to Wayland server at socket:" << connection->socketName();
+            });
+            connection->initConnection();
+
+            qDebug() << "Creating registry";
+            m_registry = new Registry();
+            m_registry->create(connection);
+            m_registry->setup();
+        }
+
+        if (!m_xdgShell) {
+            const auto interface = m_registry->interface(Registry::Interface::XdgShellUnstableV5);
+            if (interface.name == 0 && interface.version == 0) {
+                qDebug() << "XdgShellUnstableV5 interface has not been announced";
+                return;
+            }
+            m_xdgShell = m_registry->createXdgShell(interface.name, interface.version);
+        }
+
+        Surface *surface = Surface::fromWindow(window);
+        xdgSurface = m_xdgShell->createSurface(surface, window);
+    }
+
+    xdgSurface->setWindowGeometry(windowGeometry);
+}
+
 #ifdef COPYQ_WITH_X11
 void sendDummyX11Event()
 {

src/platform/x11/x11platform.h

@@ -8,6 +8,11 @@
 #include <QKeyEvent>
 #include <QString>
 
+namespace KWayland::Client {
+    class Registry;
+    class XdgShell;
+}
+
 class X11Platform final : public PlatformNativeInterface
 {
 public:
@@ -60,6 +65,12 @@ class X11Platform final : public PlatformNativeInterface
     QString translationPrefix() override;
 
     QString themePrefix() override { return QString(); }
+
+    void setWindowGeometry(QWindow *window, const QRect &windowGeometry) override;
+
+private:
+    KWayland::Client::Registry *m_registry = nullptr;
+    KWayland::Client::XdgShell *m_xdgShell = nullptr;
 };
 
 #ifdef COPYQ_WITH_X11