add a dock geometry validator

-- under X11 it was identified that windows
many times especially under screen changes
dont end up at the correct position and size.
This vailidator(timer) will enforce repositionings
and resizes every 500ms if the window hasnt end up
to correct values and until this is achieved.

app/dock/dockview.cpp

@@ -121,6 +121,14 @@ DockView::DockView(Plasma::Corona *corona, QScreen *targetScreen, bool dockWindo
     m_screenSyncTimer.setInterval(2000);
     connect(&m_screenSyncTimer, &QTimer::timeout, this, &DockView::reconsiderScreen);
 
+    //! under X11 it was identified that windows many times especially under screen changes
+    //! dont end up at the correct position and size. This timer will enforce repositionings
+    //! and resizes every 500ms if the window hasnt end up to correct values and until this
+    //! is achieved
+    m_validateGeometryTimer.setSingleShot(true);
+    m_validateGeometryTimer.setInterval(500);
+    connect(&m_validateGeometryTimer, &QTimer::timeout, this, &DockView::syncGeometry);
+
     auto *dockCorona = qobject_cast<DockCorona *>(this->corona());
 
     if (dockCorona) {
@@ -180,13 +188,18 @@ void DockView::init()
     connect(qGuiApp, &QGuiApplication::screenAdded, this, &DockView::screenChanged);
     connect(qGuiApp, &QGuiApplication::primaryScreenChanged, this, &DockView::screenChanged);
     connect(this, &DockView::screenGeometryChanged, this, &DockView::syncGeometry);
+
     connect(this, &QQuickWindow::xChanged, this, &DockView::xChanged);
+    connect(this, &QQuickWindow::xChanged, this, &DockView::validateDockGeometry);
     connect(this, &QQuickWindow::xChanged, this, &DockView::updateAbsDockGeometry);
     connect(this, &QQuickWindow::yChanged, this, &DockView::yChanged);
+    connect(this, &QQuickWindow::yChanged, this, &DockView::validateDockGeometry);
     connect(this, &QQuickWindow::yChanged, this, &DockView::updateAbsDockGeometry);
     connect(this, &QQuickWindow::widthChanged, this, &DockView::widthChanged);
+    connect(this, &QQuickWindow::widthChanged, this, &DockView::validateDockGeometry);
     connect(this, &QQuickWindow::widthChanged, this, &DockView::updateAbsDockGeometry);
     connect(this, &QQuickWindow::heightChanged, this, &DockView::heightChanged);
+    connect(this, &QQuickWindow::heightChanged, this, &DockView::validateDockGeometry);
     connect(this, &QQuickWindow::heightChanged, this, &DockView::updateAbsDockGeometry);
 
     connect(corona(), &Plasma::Corona::availableScreenRectChanged, this, &DockView::availableScreenRectChanged);
@@ -447,6 +460,10 @@ void DockView::setScreenToFollow(QScreen *screen, bool updateScreenId)
 //! correct screen
 void DockView::reconsiderScreen()
 {
+    if (m_inDelete) {
+        return;
+    }
+
     qDebug() << "  Delayer  ";
 
     foreach (auto scr, qGuiApp->screens()) {
@@ -718,33 +735,37 @@ QRect DockView::maximumNormalGeometry()
 
 void DockView::resizeWindow(QRect availableScreenRect)
 {
+    QSize screenSize = this->screen()->size();
+    QSize size = (formFactor() == Plasma::Types::Vertical) ? QSize(maxThickness(), availableScreenRect.height()) : QSize(screenSize.width(), maxThickness());
+
     if (formFactor() == Plasma::Types::Vertical) {
         //qDebug() << "MAXIMUM RECT :: " << maximumRect << " - AVAILABLE RECT :: " << availableRect;
-        QSize size{maxThickness(), availableScreenRect.height()};
-
         if (m_behaveAsPlasmaPanel) {
             size.setWidth(normalThickness());
             size.setHeight(static_cast<int>(maxLength() * availableScreenRect.height()));
         }
-
-        setMinimumSize(size);
-        setMaximumSize(size);
-        resize(size);
     } else {
-        QSize screenSize = this->screen()->size();
-        QSize size{screenSize.width(), maxThickness()};
-
         if (m_behaveAsPlasmaPanel) {
             size.setWidth(static_cast<int>(maxLength() * screenSize.width()));
             size.setHeight(normalThickness());
         }
+    }
+
+    m_validGeometry.setSize(size);
 
-        setMinimumSize(size);
-        setMaximumSize(size);
-        resize(size);
+    setMinimumSize(size);
+    setMaximumSize(size);
+    resize(size);
+
+    if (formFactor() == Plasma::Types::Horizontal && corona()) {
+        emit corona()->availableScreenRectChanged();
+    }
+}
 
-        if (corona())
-            emit corona()->availableScreenRectChanged();
+void DockView::validateDockGeometry()
+{
+    if (geometry() != m_validGeometry) {
+        m_validateGeometryTimer.start();
     }
 }
 
@@ -848,6 +869,8 @@ void DockView::updatePosition(QRect availableScreenRect)
                        << location();
     }
 
+    m_validGeometry.setTopLeft(position);
+
     setPosition(position);
 
     if (m_shellSurface) {
@@ -857,7 +880,7 @@ void DockView::updatePosition(QRect availableScreenRect)
 
 inline void DockView::syncGeometry()
 {
-    if (!(this->screen() && this->containment()))
+    if (!(this->screen() && this->containment()) || m_inDelete)
         return;
 
     bool found{false};

app/dock/dockview.h

@@ -304,6 +304,7 @@ private slots:
     void statusChanged(Plasma::Types::ItemStatus);
     void screenChanged(QScreen *screen);
     void updateEffects();
+    void validateDockGeometry();
 
     void restoreConfig();
     void saveConfig();
@@ -346,6 +347,9 @@ private:
     QRect m_localGeometry;
     QRect m_absGeometry;
     QRect m_maskArea;
+    //! it is used in order to enforce X11 to never miss window geometry
+    QRect m_validGeometry;
+
     Layout *m_managedLayout{nullptr};
     QPointer<PlasmaQuick::ConfigView> m_configView;
 
@@ -356,6 +360,7 @@ private:
     QString m_screenToFollowId;
 
     QTimer m_screenSyncTimer;
+    QTimer m_validateGeometryTimer;
 
     //! Connections to release and bound for the managed layout
     std::array<QMetaObject::Connection, 4> connectionsManagedLayout;