ignore window states when kwin is showing desktop

--this way every dock/panel and also applets that
are using the LastActiveWindow API behave like there
is no shown window

app/wm/abstractwindowinterface.cpp

@@ -62,6 +62,8 @@ AbstractWindowInterface::AbstractWindowInterface(QObject *parent)
         emit currentActivityChanged();
     });
 
+    connect(KWindowSystem::self(), &KWindowSystem::showingDesktopChanged, this, &AbstractWindowInterface::setIsShowingDesktop);
+
     //! KWin Service tracking
     m_kwinServiceWatcher->setConnection(QDBusConnection::sessionBus());
     m_kwinServiceWatcher->setWatchedServices(QStringList({KWINSERVICE}));
@@ -88,6 +90,21 @@ AbstractWindowInterface::~AbstractWindowInterface()
     m_windowsTracker->deleteLater();
 }
 
+bool AbstractWindowInterface::isShowingDesktop() const
+{
+    return m_isShowingDesktop;
+}
+
+void AbstractWindowInterface::setIsShowingDesktop(const bool &showing)
+{
+    if (m_isShowingDesktop == showing) {
+        return;
+    }
+
+    m_isShowingDesktop = showing;
+    emit isShowingDesktopChanged();
+}
+
 QString AbstractWindowInterface::currentDesktop()
 {
     return m_currentDesktop;

app/wm/abstractwindowinterface.h

@@ -103,6 +103,7 @@ public:
     virtual AppData appDataFor(WindowId wid) = 0;
 
     bool inCurrentDesktopActivity(const WindowInfoWrap &winfo);
+    bool isShowingDesktop() const;
 
     bool hasBlockedTracking(const WindowId &wid) const;
 
@@ -139,6 +140,8 @@ signals:
     void currentDesktopChanged();
     void currentActivityChanged();
 
+    void isShowingDesktopChanged();
+
     void latteWindowAdded();
 
 protected:
@@ -181,9 +184,13 @@ private slots:
     void initKWinInterface();
     void windowRemovedSlot(WindowId wid);
 
+    void setIsShowingDesktop(const bool &showing);
+
     void onVirtualDesktopNavigationWrappingAroundChanged(bool navigationWrappingAround);
 
 private:
+    bool m_isShowingDesktop{false};
+
     bool m_isKWinInterfaceAvailable{false};
     bool m_isVirtualDesktopNavigationWrappingAround{true};
 

app/wm/tracker/trackedgeneralinfo.cpp

@@ -152,6 +152,7 @@ bool TrackedGeneralInfo::isTracking(const WindowInfoWrap &winfo) const
 bool TrackedGeneralInfo::isShown(const WindowInfoWrap &winfo) const
 {
     return (winfo.isValid()
+            && !m_wm->isShowingDesktop()
             && isTrackingCurrentActivity()
             && winfo.isOnDesktop(m_wm->currentDesktop())
             && winfo.isOnActivity(m_wm->currentActivity()));

app/wm/tracker/windowstracker.cpp

@@ -109,6 +109,7 @@ void Windows::init()
 
     connect(m_wm, &AbstractWindowInterface::currentDesktopChanged, this, &Windows::updateAllHints);
     connect(m_wm, &AbstractWindowInterface::currentActivityChanged,  this, &Windows::updateAllHints);    
+    connect(m_wm, &AbstractWindowInterface::isShowingDesktopChanged,  this, &Windows::updateAllHints);
 }
 
 void Windows::initLayoutHints(Latte::Layout::GenericLayout *layout)
@@ -903,6 +904,10 @@ void Windows::updateHints(Latte::View *view)
 
     //! First Pass
     for (const auto &winfo : m_windows) {
+        if (m_wm->isShowingDesktop()) {
+            break;
+        }
+
         if (!existsFaultyWindow && (winfo.wid()<=0 || winfo.geometry() == QRect(0, 0, 0, 0))) {
             existsFaultyWindow = true;
         }
@@ -966,7 +971,7 @@ void Windows::updateHints(Latte::View *view)
     }
 
     //! PASS 2
-    if (foundActiveInCurScreen && !foundActiveTouchInCurScreen) {
+    if (!m_wm->isShowingDesktop() && foundActiveInCurScreen && !foundActiveTouchInCurScreen) {
         //! Second Pass to track also Child windows if needed
 
         //qDebug() << "Windows Array...";
@@ -1069,6 +1074,10 @@ void Windows::updateHints(Latte::Layout::GenericLayout *layout) {
     WindowId maxWinId;
 
     for (const auto &winfo : m_windows) {
+        if (m_wm->isShowingDesktop()) {
+            break;
+        }
+
         if (!existsFaultyWindow && (winfo.wid()<=0 || winfo.geometry() == QRect(0, 0, 0, 0))) {
             existsFaultyWindow = true;
         }