WaylandServer: Add a setting to disable PrimarySelection

CCBUG: 441668

src/kwin.kcfg

@@ -318,6 +318,9 @@
         <entry name="DoubleTapWakeup" type="Bool">
             <default>true</default>
         </entry>
+        <entry name="EnablePrimarySelection" type="Bool">
+            <default>true</default>
+        </entry>
     </group>
     <group name="Xwayland">
         <entry name="XwaylandCrashPolicy" type="Enum">

src/main.cpp

@@ -93,7 +93,7 @@ Application::Application(Application::OperationMode mode, int &argc, char **argv
     : QApplication(argc, argv)
     , m_eventFilter(new XcbEventFilter())
     , m_configLock(false)
-    , m_config()
+    , m_config(KSharedConfig::openConfig(QStringLiteral("kwinrc")))
     , m_kxkbConfig()
     , m_operationMode(mode)
 {
@@ -134,9 +134,6 @@ void Application::start()
 
     setQuitOnLastWindowClosed(false);
 
-    if (!m_config) {
-        m_config = KSharedConfig::openConfig();
-    }
     if (!m_config->isImmutable() && m_configLock) {
         // TODO: This shouldn't be necessary
         // config->setReadOnly( true );

src/main_wayland.cpp

@@ -201,17 +201,21 @@ void ApplicationWayland::refreshSettings(const KConfigGroup &group, const QByteA
     if (m_startXWayland && group.name() == "Xwayland" && names.contains("Scale")) {
         setXwaylandScale(group.readEntry("Scale", 1.0));
     }
+
+    if (group.name() == "Wayland" && names.contains("EnablePrimarySelection")) {
+        waylandServer()->setEnablePrimarySelection(group.readEntry("EnablePrimarySelection", true));
+    }
 }
 
 void ApplicationWayland::startSession()
 {
-    if (!m_inputMethodServerToStart.isEmpty()) {
-        InputMethod::self()->setInputMethodCommand(m_inputMethodServerToStart);
-    } else {
     KSharedConfig::Ptr kwinSettings = kwinApp()->config();
     m_settingsWatcher = KConfigWatcher::create(kwinSettings);
     connect(m_settingsWatcher.data(), &KConfigWatcher::configChanged, this, &ApplicationWayland::refreshSettings);
 
+    if (!m_inputMethodServerToStart.isEmpty()) {
+        InputMethod::self()->setInputMethodCommand(m_inputMethodServerToStart);
+    } else {
         refreshSettings(kwinSettings->group("Wayland"), {"InputMethod"});
     }
 

src/wayland_server.cpp

@@ -327,6 +327,16 @@ void WaylandServer::handleOutputDisabled(Output *output)
     }
 }
 
+void WaylandServer::setEnablePrimarySelection(bool enable)
+{
+    if (!enable && m_primarySelectionDeviceManager != nullptr) {
+        delete m_primarySelectionDeviceManager;
+        m_primarySelectionDeviceManager = nullptr;
+    } else if (enable && m_primarySelectionDeviceManager == nullptr) {
+        m_primarySelectionDeviceManager = new PrimarySelectionDeviceManagerV1Interface(m_display, m_display);
+    }
+}
+
 Output *WaylandServer::findOutput(KWaylandServer::OutputInterface *outputIface) const
 {
     for (auto it = m_waylandOutputs.constBegin(); it != m_waylandOutputs.constEnd(); ++it) {
@@ -415,7 +425,10 @@ bool WaylandServer::init(InitializationFlags flags)
     new RelativePointerManagerV1Interface(m_display, m_display);
     m_dataDeviceManager = new DataDeviceManagerInterface(m_display, m_display);
     new DataControlDeviceManagerV1Interface(m_display, m_display);
-    new PrimarySelectionDeviceManagerV1Interface(m_display, m_display);
+
+    const auto kwinConfig = kwinApp()->config();
+    setEnablePrimarySelection(kwinConfig->group("Wayland").readEntry("EnablePrimarySelection", true));
+
     m_idle = new IdleInterface(m_display, m_display);
     auto idleInhibition = new IdleInhibition(m_idle);
     connect(this, &WaylandServer::windowAdded, idleInhibition, &IdleInhibition::registerClient);

src/wayland_server.h

@@ -47,6 +47,7 @@ class LinuxDmaBufV1ClientBuffer;
 class TabletManagerV2Interface;
 class KeyboardShortcutsInhibitManagerV1Interface;
 class XdgDecorationManagerV1Interface;
+class PrimarySelectionDeviceManagerV1Interface;
 }
 
 namespace KWin
@@ -222,6 +223,7 @@ public:
     {
         m_linuxDmabufBuffers.remove(buffer);
     }
+    void setEnablePrimarySelection(bool enable);
 
     Output *findOutput(KWaylandServer::OutputInterface *output) const;
 
@@ -291,6 +293,7 @@ private:
     KWaylandServer::XdgForeignV2Interface *m_XdgForeign = nullptr;
     KWaylandServer::PrimaryOutputV1Interface *m_primary = nullptr;
     XdgActivationV1Integration *m_xdgActivationIntegration = nullptr;
+    KWaylandServer::PrimarySelectionDeviceManagerV1Interface *m_primarySelectionDeviceManager = nullptr;
     QList<Window *> m_windows;
     InitializationFlags m_initFlags;
     QHash<Output *, WaylandOutput *> m_waylandOutputs;