Make focus setters in InputDeviceHandler work as expected

src/input.cpp

@@ -2918,8 +2918,9 @@ bool InputDeviceHandler::setHover(Toplevel *toplevel)
 
 void InputDeviceHandler::setFocus(Toplevel *toplevel)
 {
+    Toplevel *oldFocus = m_focus.window;
     m_focus.window = toplevel;
-    //TODO: call focusUpdate?
+    focusUpdate(oldFocus, m_focus.window);
 }
 
 void InputDeviceHandler::setDecoration(Decoration::DecoratedClientImpl *decoration)
@@ -2932,13 +2933,14 @@ void InputDeviceHandler::setDecoration(Decoration::DecoratedClientImpl *decorati
 
 void InputDeviceHandler::setInternalWindow(QWindow *window)
 {
+    QWindow *oldFocus = m_focus.internalWindow;
     m_focus.internalWindow = window;
-    //TODO: call internalWindowUpdate?
+    cleanupInternalWindow(oldFocus, m_focus.internalWindow);
 }
 
 void InputDeviceHandler::updateFocus()
 {
-    auto oldFocus = m_focus.window;
+    Toplevel *focus = m_hover.window;
 
     if (m_hover.window && !m_hover.window->surface()) {
         // The surface has not yet been created (special XWayland case).
@@ -2947,12 +2949,10 @@ void InputDeviceHandler::updateFocus()
             m_hover.surfaceCreatedConnection = connect(m_hover.window, &Toplevel::surfaceChanged,
                                                     this, &InputDeviceHandler::update);
         }
-        m_focus.window = nullptr;
-    } else {
-        m_focus.window = m_hover.window;
+        focus = nullptr;
     }
 
-    focusUpdate(oldFocus, m_focus.window);
+    setFocus(focus);
 }
 
 bool InputDeviceHandler::updateDecoration()

src/pointer_input.cpp

@@ -157,7 +157,6 @@ void PointerInputRedirection::init()
     connect(waylandServer()->seat(), &KWaylandServer::SeatInterface::dragEnded, this,
         [this] {
             // need to force a focused pointer change
-            waylandServer()->seat()->setFocusedPointerSurface(nullptr);
             setFocus(nullptr);
             update();
         }
@@ -183,7 +182,6 @@ void PointerInputRedirection::updateOnStartMoveResize()
     breakPointerConstraints(focus() ? focus()->surface() : nullptr);
     disconnectPointerConstraintsConnection();
     setFocus(nullptr);
-    waylandServer()->seat()->setFocusedPointerSurface(nullptr);
 }
 
 void PointerInputRedirection::updateToReset()
@@ -210,7 +208,6 @@ void PointerInputRedirection::updateToReset()
         disconnectPointerConstraintsConnection();
         setFocus(nullptr);
     }
-    waylandServer()->seat()->setFocusedPointerSurface(nullptr);
 }
 
 class PositionUpdateBlocker
@@ -555,8 +552,6 @@ void PointerInputRedirection::cleanupDecoration(Decoration::DecoratedClientImpl
         return;
     }
 
-    waylandServer()->seat()->setFocusedPointerSurface(nullptr);
-
     auto pos = m_pos - now->client()->pos();
     QHoverEvent event(QEvent::HoverEnter, pos, pos);
     QCoreApplication::instance()->sendEvent(now->decoration(), &event);