[kwin_wayland] Cleanup wayland_backend.[h|cpp]

Remove no longer needed includes, turn one time slot methods into
lambdas, etc.

main_wayland.cpp

@@ -28,6 +28,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // Qt
 #include <qplatformdefs.h>
 #include <QCommandLineParser>
+#include <QFile>
 
 // system
 #ifdef HAVE_UNISTD_H

wayland_backend.cpp

@@ -38,7 +38,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <QAbstractEventDispatcher>
 #include <QCoreApplication>
 #include <QDebug>
-#include <QImage>
 #include <QThread>
 // xcb
 #include <xcb/xtest.h>
@@ -370,10 +369,17 @@ WaylandBackend::WaylandBackend(QObject *parent)
     );
     connect(m_registry, &Registry::outputAnnounced, this,
         [this](quint32 name) {
-            addOutput(m_registry->bindOutput(name, 2));
+            Output *output = new Output(this);
+            output->setup(m_registry->bindOutput(name, 2));
+            m_outputs.append(output);
+            connect(output, &Output::changed, this, &WaylandBackend::outputsChanged);
+        }
+    );
+    connect(m_registry, &Registry::seatAnnounced, this,
+        [this](quint32 name) {
+            m_seat.reset(new WaylandSeat(m_registry->bindSeat(name, 2), this));
         }
     );
-    connect(m_registry, &Registry::seatAnnounced, this, &WaylandBackend::createSeat);
     connect(m_registry, &Registry::shmAnnounced, this,
         [this](quint32 name) {
             m_shm->setup(m_registry->bindShm(name, 1));
@@ -477,11 +483,6 @@ void WaylandBackend::initConnection()
     m_connectionThreadObject->initConnection();
 }
 
-void WaylandBackend::createSeat(uint32_t name)
-{
-    m_seat.reset(new WaylandSeat(m_registry->bindSeat(name, 2), this));
-}
-
 void WaylandBackend::installCursorImage(Qt::CursorShape shape)
 {
     if (m_seat.isNull()) {
@@ -525,19 +526,6 @@ void WaylandBackend::createSurface()
     }
 }
 
-void WaylandBackend::addOutput(wl_output *o)
-{
-    Output *output = new Output(this);
-    output->setup(o);
-    m_outputs.append(output);
-    connect(output, &Output::changed, this, &WaylandBackend::outputsChanged);
-}
-
-wl_registry *WaylandBackend::registry()
-{
-    return m_registry->registry();
-}
-
 QSize WaylandBackend::shellSurfaceSize() const
 {
     if (m_shellSurface) {

wayland_backend.h

@@ -22,20 +22,18 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // KWin
 #include <kwinglobals.h>
 // Qt
-#include <QDir>
 #include <QHash>
 #include <QImage>
 #include <QObject>
 #include <QPoint>
 #include <QSize>
-// wayland
-#include <wayland-client.h>
 
 class QTemporaryFile;
-class QImage;
 struct wl_cursor_theme;
 struct wl_buffer;
+struct wl_display;
 struct wl_event_queue;
+struct wl_seat;
 
 namespace KWin
 {
@@ -128,12 +126,9 @@ class KWIN_EXPORT WaylandBackend : public QObject
 public:
     virtual ~WaylandBackend();
     wl_display *display();
-    wl_registry *registry();
     Compositor *compositor();
-    void addOutput(wl_output *o);
     const QList<Output*> &outputs() const;
     ShmPool *shmPool();
-    void createSeat(uint32_t name);
 
     Surface *surface() const;
     QSize shellSurfaceSize() const;