Create KSelectionOwner in StartupFeedbackEffect only on X11

Summary:
On Wayland we do not need the selection. By only creating the
KSelectionOwner on X11 an X11-runtime dependency is removed from the
StartupFeedbackEffect.

Reviewers: #kwin, #plasma_on_wayland

Subscribers: plasma-devel, kwin

Tags: #plasma_on_wayland, #kwin

Differential Revision: https://phabricator.kde.org/D3121

effects/startupfeedback/startupfeedback.cpp

@@ -31,6 +31,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <KIconLoader>
 #include <KStartupInfo>
 #include <KSelectionOwner>
+#include <KWindowSystem>
 // KWin
 #include <kwinglutils.h>
 
@@ -73,7 +74,7 @@ static const int s_startupDefaultTimeout = 5;
 StartupFeedbackEffect::StartupFeedbackEffect()
     : m_bounceSizesRatio(1.0)
     , m_startupInfo(new KStartupInfo(KStartupInfo::CleanOnCantDetect, this))
-    , m_selection(new KSelectionOwner("_KDE_STARTUP_FEEDBACK", xcbConnection(), x11RootWindow(), this))
+    , m_selection(nullptr)
     , m_active(false)
     , m_frame(0)
     , m_progress(0)
@@ -85,7 +86,10 @@ StartupFeedbackEffect::StartupFeedbackEffect()
     for (int i = 0; i < 5; ++i) {
         m_bouncingTextures[i] = 0;
     }
-    m_selection->claim(true);
+    if (KWindowSystem::isPlatformX11()) {
+        m_selection = new KSelectionOwner("_KDE_STARTUP_FEEDBACK", xcbConnection(), x11RootWindow(), this);
+        m_selection->claim(true);
+    }
     connect(m_startupInfo, SIGNAL(gotNewStartup(KStartupInfoId,KStartupInfoData)), SLOT(gotNewStartup(KStartupInfoId,KStartupInfoData)));
     connect(m_startupInfo, SIGNAL(gotRemoveStartup(KStartupInfoId,KStartupInfoData)), SLOT(gotRemoveStartup(KStartupInfoId,KStartupInfoData)));
     connect(m_startupInfo, SIGNAL(gotStartupChange(KStartupInfoId,KStartupInfoData)), SLOT(gotStartupChange(KStartupInfoId,KStartupInfoData)));