Move X11CursorTracker from WaylandSeat to WaylandBackend

Allows it to be easily re-used in case we don't have a Seat.

wayland_backend.cpp

@@ -153,7 +153,6 @@ WaylandSeat::WaylandSeat(wl_seat *seat, WaylandBackend *backend)
     , m_cursor(NULL)
     , m_theme(NULL)
     , m_enteredSerial(0)
-    , m_cursorTracker()
     , m_backend(backend)
 {
     m_seat->setup(seat);
@@ -233,8 +232,7 @@ WaylandSeat::WaylandSeat(wl_seat *seat, WaylandBackend *backend)
                         input()->processPointerAxis(toAxis(), delta, time);
                     }
                 );
-                m_cursorTracker.reset(new X11CursorTracker(m_backend));
-                connect(m_cursorTracker.data(), &X11CursorTracker::cursorImageChanged, this,
+                connect(m_backend->cursorTracker(), &X11CursorTracker::cursorImageChanged, this,
                     [this](Buffer::Ptr image, const QSize &size, const QPoint &hotspot) {
                         if (image.isNull()) {
                             return;
@@ -260,7 +258,6 @@ void WaylandSeat::destroyPointer()
 {
     delete m_pointer;
     m_pointer = nullptr;
-    m_cursorTracker.reset();
 }
 
 void WaylandSeat::destroyKeyboard()
@@ -269,13 +266,6 @@ void WaylandSeat::destroyKeyboard()
     m_keyboard = nullptr;
 }
 
-void WaylandSeat::resetCursor()
-{
-    if (!m_cursorTracker.isNull()) {
-        m_cursorTracker->resetCursor();
-    }
-}
-
 void WaylandSeat::installCursorImage(wl_buffer *image, const QSize &size, const QPoint &hotSpot)
 {
     if (!m_pointer || !m_pointer->isValid()) {
@@ -352,6 +342,7 @@ WaylandBackend::WaylandBackend(QObject *parent)
     , m_shellSurface(NULL)
     , m_seat()
     , m_shm(new ShmPool(this))
+    , m_cursorTracker()
     , m_connectionThreadObject(nullptr)
     , m_connectionThread(nullptr)
     , m_fullscreenShell(new FullscreenShell(this))
@@ -437,11 +428,13 @@ void WaylandBackend::initConnection()
             // setup registry
             m_registry->create(m_display);
             m_registry->setup();
+            m_cursorTracker.reset(new X11CursorTracker(this, this));
         },
         Qt::QueuedConnection);
     connect(m_connectionThreadObject, &ConnectionThread::connectionDied, this,
         [this]() {
             emit systemCompositorDied();
+            m_cursorTracker.reset();
             m_seat.reset();
             m_shm->destroy();
             destroyOutputs();
@@ -508,13 +501,7 @@ void WaylandBackend::createSurface()
         // map the surface as fullscreen
         m_shellSurface = m_shell->createSurface(m_surface, this);
         m_shellSurface->setFullscreen();
-        connect(m_shellSurface, &ShellSurface::pinged, this,
-            [this]() {
-                if (!m_seat.isNull()) {
-                    m_seat->resetCursor();
-                }
-            }
-        );
+        connect(m_shellSurface, &ShellSurface::pinged, m_cursorTracker.data(), &X11CursorTracker::resetCursor);
         connect(m_shellSurface, &ShellSurface::sizeChanged, this, &WaylandBackend::shellSurfaceSizeChanged);
     }
 }

wayland_backend.h

@@ -108,7 +108,6 @@ public:
     WaylandSeat(wl_seat *seat, WaylandBackend *backend);
     virtual ~WaylandSeat();
 
-    void resetCursor();
     void installCursorImage(wl_buffer *image, const QSize &size, const QPoint &hotspot);
     void installCursorImage(Qt::CursorShape shape);
 private Q_SLOTS:
@@ -123,7 +122,6 @@ private:
     KWayland::Client::Surface *m_cursor;
     wl_cursor_theme *m_theme;
     uint32_t m_enteredSerial;
-    QScopedPointer<X11CursorTracker> m_cursorTracker;
     WaylandBackend *m_backend;
 };
 
@@ -142,6 +140,7 @@ public:
     KWayland::Client::Compositor *compositor();
     const QList<KWayland::Client::Output*> &outputs() const;
     KWayland::Client::ShmPool *shmPool();
+    X11CursorTracker *cursorTracker();
 
     KWayland::Client::Surface *surface() const;
     QSize shellSurfaceSize() const;
@@ -166,6 +165,7 @@ private:
     KWayland::Client::ShellSurface *m_shellSurface;
     QScopedPointer<WaylandSeat> m_seat;
     KWayland::Client::ShmPool *m_shm;
+    QScopedPointer<X11CursorTracker> m_cursorTracker;
     QList<KWayland::Client::Output*> m_outputs;
     KWayland::Client::ConnectionThread *m_connectionThreadObject;
     QThread *m_connectionThread;
@@ -210,6 +210,12 @@ KWayland::Client::ShmPool* WaylandBackend::shmPool()
     return m_shm;
 }
 
+inline
+X11CursorTracker *WaylandBackend::cursorTracker()
+{
+    return m_cursorTracker.data();
+}
+
 inline
 KWayland::Client::Surface *WaylandBackend::surface() const
 {