update Canvas geometry when editThickness altered

app/view/positioner.cpp

@@ -153,6 +153,10 @@ void Positioner::init()
         syncGeometry();
     });
 
+    connect(m_view, &Latte::View::editThicknessChanged, this, [&]() {
+        updateCanvasGeometry(m_lastAvailableScreenRect);
+    });
+
     connect(m_view, &Latte::View::normalThicknessChanged, this, [&]() {
         if (m_view->behaveAsPlasmaPanel()) {
             syncGeometry();
@@ -479,11 +483,15 @@ void Positioner::immediateSyncGeometry()
             }
 
             validateTopBottomBorders(availableScreenRect, freeRegion);
+
+            m_lastAvailableScreenRegion = freeRegion;
         } else {
             m_view->effects()->setForceTopBorder(false);
             m_view->effects()->setForceBottomBorder(false);
         }
 
+        m_lastAvailableScreenRect = availableScreenRect;
+
         m_view->effects()->updateEnabledBorders();
 
         resizeWindow(availableScreenRect);
@@ -593,6 +601,10 @@ void Positioner::validateTopBottomBorders(QRect availableScreenRect, QRegion ava
 
 void Positioner::updateCanvasGeometry(QRect availableScreenRect)
 {
+    if (availableScreenRect.isEmpty()) {
+        return;
+    }
+
     QRect canvas;
     QRect screenGeometry{m_view->screen()->geometry()};
     int thickness{m_view->editThickness()};

app/view/positioner.h

@@ -165,6 +165,9 @@ private:
     QRect m_canvasGeometry;
     //! it is used in order to enforce X11 to never miss window geometry
     QRect m_validGeometry;
+    //! it is used to update geometry calculations without requesting no needed Corona calculations
+    QRect m_lastAvailableScreenRect;
+    QRegion m_lastAvailableScreenRegion;
 
     QPointer<Latte::View> m_view;
     QPointer<Latte::Corona> m_corona;