visibilitymanager use effects to hide/show mask

app/view/visibilitymanager.cpp

@@ -643,14 +643,22 @@ void VisibilityManager::updateGhostWindowState()
 
 void VisibilityManager::hide()
 {
-    m_lastMask = m_latteView->mask();
+    if (!m_latteView->effects()) {
-    m_latteView->setMask(ISHIDDENMASK);
+        return;
+    }
+
+    m_lastMask = m_latteView->effects()->mask();
+    m_latteView->effects()->setMask(ISHIDDENMASK);
 }
 
 void VisibilityManager::show()
 {
-    if (m_latteView->mask() == ISHIDDENMASK) {
+    if (!m_latteView->effects()) {
-        m_latteView->setMask(m_lastMask);
+        return;
+    }
+
+    if (m_latteView->effects()->mask() == ISHIDDENMASK) {
+        m_latteView->effects()->setMask(m_lastMask);
     }
 }
 

app/view/visibilitymanager.h

@@ -224,7 +224,7 @@ private:
     QStringList m_blockHidingEvents;
 
     QRect m_publishedStruts;
-    QRegion m_lastMask;
+    QRect m_lastMask;
 
     //! KWin Edges
     bool m_enableKWinEdgesFromUser{true};