Move definition of X11Client::damageNotifyEvent() to x11client.cpp

One step closer to the bright future where one can disable X11 support
at build time.

toplevel.cpp

@@ -23,7 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "activities.h"
 #endif
 #include "atoms.h"
-#include "x11client.h"
 #include "client_machine.h"
 #include "composite.h"
 #include "effects.h"
@@ -319,24 +318,6 @@ bool Toplevel::compositing() const
     return Workspace::self()->compositing();
 }
 
-void X11Client::damageNotifyEvent()
-{
-    if (m_syncRequest.isPending && isResize()) {
-        emit damaged(this, QRect());
-        m_isDamaged = true;
-        return;
-    }
-
-    if (!ready_for_painting) { // avoid "setReadyForPainting()" function calling overhead
-        if (m_syncRequest.counter == XCB_NONE) {  // cannot detect complete redraw, consider done now
-            setReadyForPainting();
-            setupWindowManagementInterface();
-        }
-    }
-
-    Toplevel::damageNotifyEvent();
-}
-
 bool Toplevel::resetAndFetchDamage()
 {
     if (!m_isDamaged)

x11client.cpp

@@ -4959,4 +4959,22 @@ void X11Client::applyWindowRules()
     setBlockingCompositing(info->isBlockingCompositing());
 }
 
+void X11Client::damageNotifyEvent()
+{
+    if (m_syncRequest.isPending && isResize()) {
+        emit damaged(this, QRect());
+        m_isDamaged = true;
+        return;
+    }
+
+    if (!readyForPainting()) { // avoid "setReadyForPainting()" function calling overhead
+        if (m_syncRequest.counter == XCB_NONE) {  // cannot detect complete redraw, consider done now
+            setReadyForPainting();
+            setupWindowManagementInterface();
+        }
+    }
+
+    AbstractClient::damageNotifyEvent();
+}
+
 } // namespace