diff --git a/abstract_client.cpp b/abstract_client.cpp
index 93593db45..df3e84497 100644
--- a/abstract_client.cpp
+++ b/abstract_client.cpp
@@ -1,1738 +1,1752 @@
 /********************************************************************
  KWin - the KDE window manager
  This file is part of the KDE project.
 
 Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 #include "abstract_client.h"
 
 #include "appmenu.h"
 #include "decorations/decoratedclient.h"
 #include "decorations/decorationpalette.h"
 #include "decorations/decorationbridge.h"
 #include "cursor.h"
 #include "effects.h"
 #include "focuschain.h"
 #include "outline.h"
 #include "screens.h"
 #ifdef KWIN_BUILD_TABBOX
 #include "tabbox.h"
 #endif
 #include "screenedge.h"
 #include "tabgroup.h"
 #include "useractions.h"
 #include "workspace.h"
 
 #include "wayland_server.h"
 #include <KWayland/Server/plasmawindowmanagement_interface.h>
 
 #include <KDecoration2/Decoration>
 
 #include <KDesktopFile>
 
 #include <QMouseEvent>
 #include <QStyleHints>
 
 namespace KWin
 {
 
 QHash<QString, std::weak_ptr<Decoration::DecorationPalette>> AbstractClient::s_palettes;
 std::shared_ptr<Decoration::DecorationPalette> AbstractClient::s_defaultPalette;
 
 AbstractClient::AbstractClient()
     : Toplevel()
 #ifdef KWIN_BUILD_TABBOX
     , m_tabBoxClient(QSharedPointer<TabBox::TabBoxClientImpl>(new TabBox::TabBoxClientImpl(this)))
 #endif
     , m_colorScheme(QStringLiteral("kdeglobals"))
 {
     connect(this, &AbstractClient::geometryShapeChanged, this, &AbstractClient::geometryChanged);
     auto signalMaximizeChanged = static_cast<void (AbstractClient::*)(KWin::AbstractClient*, MaximizeMode)>(&AbstractClient::clientMaximizedStateChanged);
     connect(this, signalMaximizeChanged, this, &AbstractClient::geometryChanged);
     connect(this, &AbstractClient::clientStepUserMovedResized,   this, &AbstractClient::geometryChanged);
     connect(this, &AbstractClient::clientStartUserMovedResized,  this, &AbstractClient::moveResizedChanged);
     connect(this, &AbstractClient::clientFinishUserMovedResized, this, &AbstractClient::moveResizedChanged);
     connect(this, &AbstractClient::clientStartUserMovedResized,  this, &AbstractClient::removeCheckScreenConnection);
     connect(this, &AbstractClient::clientFinishUserMovedResized, this, &AbstractClient::setupCheckScreenConnection);
 
     connect(this, &AbstractClient::paletteChanged, this, &AbstractClient::triggerDecorationRepaint);
 
     connect(Decoration::DecorationBridge::self(), &QObject::destroyed, this, &AbstractClient::destroyDecoration);
 
     // replace on-screen-display on size changes
     connect(this, &AbstractClient::geometryShapeChanged, this,
         [this] (Toplevel *c, const QRect &old) {
             Q_UNUSED(c)
             if (isOnScreenDisplay() && !geometry().isEmpty() && old.size() != geometry().size()) {
                 GeometryUpdatesBlocker blocker(this);
                 QRect area = workspace()->clientArea(PlacementArea, Screens::self()->current(), desktop());
                 Placement::self()->place(this, area);
                 setGeometryRestore(geometry());
             }
         }
     );
 
     connect(this, &AbstractClient::paddingChanged, this, [this]() {
         m_visibleRectBeforeGeometryUpdate = visibleRect();
     });
 
     connect(ApplicationMenu::self(), &ApplicationMenu::applicationMenuEnabledChanged, this, [this] {
         emit hasApplicationMenuChanged(hasApplicationMenu());
     });
 }
 
 AbstractClient::~AbstractClient()
 {
     assert(m_blockGeometryUpdates == 0);
     Q_ASSERT(m_decoration.decoration == nullptr);
 }
 
 void AbstractClient::updateMouseGrab()
 {
 }
 
 bool AbstractClient::belongToSameApplication(const AbstractClient *c1, const AbstractClient *c2, bool active_hack)
 {
     return c1->belongsToSameApplication(c2, active_hack);
 }
 
 bool AbstractClient::isTransient() const
 {
     return false;
 }
 
 TabGroup *AbstractClient::tabGroup() const
 {
     return nullptr;
 }
 
 bool AbstractClient::untab(const QRect &toGeometry, bool clientRemoved)
 {
     Q_UNUSED(toGeometry)
     Q_UNUSED(clientRemoved)
     return false;
 }
 
 bool AbstractClient::isCurrentTab() const
 {
     return true;
 }
 
 xcb_timestamp_t AbstractClient::userTime() const
 {
     return XCB_TIME_CURRENT_TIME;
 }
 
 void AbstractClient::setSkipSwitcher(bool set)
 {
     set = rules()->checkSkipSwitcher(set);
     if (set == skipSwitcher())
         return;
     m_skipSwitcher = set;
     updateWindowRules(Rules::SkipSwitcher);
     emit skipSwitcherChanged();
 }
 
 void AbstractClient::setSkipPager(bool b)
 {
     b = rules()->checkSkipPager(b);
     if (b == skipPager())
         return;
     m_skipPager = b;
     doSetSkipPager();
     info->setState(b ? NET::SkipPager : NET::States(0), NET::SkipPager);
     updateWindowRules(Rules::SkipPager);
     emit skipPagerChanged();
 }
 
 void AbstractClient::doSetSkipPager()
 {
 }
 
 void AbstractClient::setSkipTaskbar(bool b)
 {
     int was_wants_tab_focus = wantsTabFocus();
     if (b == skipTaskbar())
         return;
     m_skipTaskbar = b;
     doSetSkipTaskbar();
     updateWindowRules(Rules::SkipTaskbar);
     if (was_wants_tab_focus != wantsTabFocus()) {
         FocusChain::self()->update(this, isActive() ? FocusChain::MakeFirst : FocusChain::Update);
     }
     emit skipTaskbarChanged();
 }
 
 void AbstractClient::setOriginalSkipTaskbar(bool b)
 {
     m_originalSkipTaskbar = rules()->checkSkipTaskbar(b);
     setSkipTaskbar(m_originalSkipTaskbar);
 }
 
 void AbstractClient::doSetSkipTaskbar()
 {
 
 }
 
 void AbstractClient::setIcon(const QIcon &icon)
 {
     m_icon = icon;
     emit iconChanged();
 }
 
 void AbstractClient::setActive(bool act)
 {
     if (m_active == act) {
         return;
     }
     m_active = act;
     const int ruledOpacity = m_active
                              ? rules()->checkOpacityActive(qRound(opacity() * 100.0))
                              : rules()->checkOpacityInactive(qRound(opacity() * 100.0));
     setOpacity(ruledOpacity / 100.0);
     workspace()->setActiveClient(act ? this : NULL);
 
     if (!m_active)
         cancelAutoRaise();
 
     if (!m_active && shadeMode() == ShadeActivated)
         setShade(ShadeNormal);
 
     StackingUpdatesBlocker blocker(workspace());
     workspace()->updateClientLayer(this);   // active windows may get different layer
     auto mainclients = mainClients();
     for (auto it = mainclients.constBegin();
             it != mainclients.constEnd();
             ++it)
         if ((*it)->isFullScreen())  // fullscreens go high even if their transient is active
             workspace()->updateClientLayer(*it);
 
     doSetActive();
     emit activeChanged();
     updateMouseGrab();
 }
 
 void AbstractClient::doSetActive()
 {
 }
 
 Layer AbstractClient::layer() const
 {
     if (m_layer == UnknownLayer)
         const_cast< AbstractClient* >(this)->m_layer = belongsToLayer();
     return m_layer;
 }
 
 void AbstractClient::updateLayer()
 {
     if (layer() == belongsToLayer())
         return;
     StackingUpdatesBlocker blocker(workspace());
     invalidateLayer(); // invalidate, will be updated when doing restacking
     for (auto it = transients().constBegin(),
                                   end = transients().constEnd(); it != end; ++it)
         (*it)->updateLayer();
 }
 
 void AbstractClient::invalidateLayer()
 {
     m_layer = UnknownLayer;
 }
 
 Layer AbstractClient::belongsToLayer() const
 {
     // NOTICE while showingDesktop, desktops move to the AboveLayer
     // (interchangeable w/ eg. yakuake etc. which will at first remain visible)
     // and the docks move into the NotificationLayer (which is between Above- and
     // ActiveLayer, so that active fullscreen windows will still cover everything)
     // Since the desktop is also activated, nothing should be in the ActiveLayer, though
     if (isDesktop())
         return workspace()->showingDesktop() ? AboveLayer : DesktopLayer;
     if (isSplash())          // no damn annoying splashscreens
         return NormalLayer; // getting in the way of everything else
     if (isDock()) {
         if (workspace()->showingDesktop())
             return NotificationLayer;
         return layerForDock();
     }
     if (isOnScreenDisplay())
         return OnScreenDisplayLayer;
     if (isNotification())
         return NotificationLayer;
     if (workspace()->showingDesktop() && belongsToDesktop()) {
         return AboveLayer;
     }
     if (keepBelow())
         return BelowLayer;
     if (isActiveFullScreen())
         return ActiveLayer;
     if (keepAbove())
         return AboveLayer;
 
     return NormalLayer;
 }
 
 bool AbstractClient::belongsToDesktop() const
 {
     return false;
 }
 
 Layer AbstractClient::layerForDock() const
 {
     // slight hack for the 'allow window to cover panel' Kicker setting
     // don't move keepbelow docks below normal window, but only to the same
     // layer, so that both may be raised to cover the other
     if (keepBelow())
         return NormalLayer;
     if (keepAbove()) // slight hack for the autohiding panels
         return AboveLayer;
     return DockLayer;
 }
 
 void AbstractClient::setKeepAbove(bool b)
 {
     b = rules()->checkKeepAbove(b);
     if (b && !rules()->checkKeepBelow(false))
         setKeepBelow(false);
     if (b == keepAbove()) {
         // force hint change if different
         if (info && bool(info->state() & NET::KeepAbove) != keepAbove())
             info->setState(keepAbove() ? NET::KeepAbove : NET::States(0), NET::KeepAbove);
         return;
     }
     m_keepAbove = b;
     if (info) {
         info->setState(keepAbove() ? NET::KeepAbove : NET::States(0), NET::KeepAbove);
     }
     workspace()->updateClientLayer(this);
     updateWindowRules(Rules::Above);
 
     doSetKeepAbove();
     emit keepAboveChanged(m_keepAbove);
 }
 
 void AbstractClient::doSetKeepAbove()
 {
 }
 
 void AbstractClient::setKeepBelow(bool b)
 {
     b = rules()->checkKeepBelow(b);
     if (b && !rules()->checkKeepAbove(false))
         setKeepAbove(false);
     if (b == keepBelow()) {
         // force hint change if different
         if (info && bool(info->state() & NET::KeepBelow) != keepBelow())
             info->setState(keepBelow() ? NET::KeepBelow : NET::States(0), NET::KeepBelow);
         return;
     }
     m_keepBelow = b;
     if (info) {
         info->setState(keepBelow() ? NET::KeepBelow : NET::States(0), NET::KeepBelow);
     }
     workspace()->updateClientLayer(this);
     updateWindowRules(Rules::Below);
 
     doSetKeepBelow();
     emit keepBelowChanged(m_keepBelow);
 }
 
 void AbstractClient::doSetKeepBelow()
 {
 }
 
 void AbstractClient::startAutoRaise()
 {
     delete m_autoRaiseTimer;
     m_autoRaiseTimer = new QTimer(this);
     connect(m_autoRaiseTimer, &QTimer::timeout, this, &AbstractClient::autoRaise);
     m_autoRaiseTimer->setSingleShot(true);
     m_autoRaiseTimer->start(options->autoRaiseInterval());
 }
 
 void AbstractClient::cancelAutoRaise()
 {
     delete m_autoRaiseTimer;
     m_autoRaiseTimer = nullptr;
 }
 
 void AbstractClient::autoRaise()
 {
     workspace()->raiseClient(this);
     cancelAutoRaise();
 }
 
 bool AbstractClient::wantsTabFocus() const
 {
     return (isNormalWindow() || isDialog()) && wantsInput();
 }
 
 bool AbstractClient::isSpecialWindow() const
 {
     // TODO
     return isDesktop() || isDock() || isSplash() || isToolbar() || isNotification() || isOnScreenDisplay();
 }
 
 void AbstractClient::demandAttention(bool set)
 {
     if (isActive())
         set = false;
     if (m_demandsAttention == set)
         return;
     m_demandsAttention = set;
     if (info) {
         info->setState(set ? NET::DemandsAttention : NET::States(0), NET::DemandsAttention);
     }
     workspace()->clientAttentionChanged(this, set);
     emit demandsAttentionChanged();
 }
 
 void AbstractClient::setDesktop(int desktop)
 {
     const int numberOfDesktops = VirtualDesktopManager::self()->count();
     if (desktop != NET::OnAllDesktops)   // Do range check
         desktop = qMax(1, qMin(numberOfDesktops, desktop));
     desktop = qMin(numberOfDesktops, rules()->checkDesktop(desktop));
     if (m_desktop == desktop)
         return;
 
     int was_desk = m_desktop;
     const bool wasOnCurrentDesktop = isOnCurrentDesktop();
     m_desktop = desktop;
 
     if (info) {
         info->setDesktop(desktop);
     }
     if ((was_desk == NET::OnAllDesktops) != (desktop == NET::OnAllDesktops)) {
         // onAllDesktops changed
         workspace()->updateOnAllDesktopsOfTransients(this);
     }
 
     auto transients_stacking_order = workspace()->ensureStackingOrder(transients());
     for (auto it = transients_stacking_order.constBegin();
             it != transients_stacking_order.constEnd();
             ++it)
         (*it)->setDesktop(desktop);
 
     if (isModal())  // if a modal dialog is moved, move the mainwindow with it as otherwise
         // the (just moved) modal dialog will confusingly return to the mainwindow with
         // the next desktop change
     {
         foreach (AbstractClient * c2, mainClients())
         c2->setDesktop(desktop);
     }
 
     doSetDesktop(desktop, was_desk);
 
     FocusChain::self()->update(this, FocusChain::MakeFirst);
     updateWindowRules(Rules::Desktop);
 
     emit desktopChanged();
     if (wasOnCurrentDesktop != isOnCurrentDesktop())
         emit desktopPresenceChanged(this, was_desk);
 }
 
 void AbstractClient::doSetDesktop(int desktop, int was_desk)
 {
     Q_UNUSED(desktop)
     Q_UNUSED(was_desk)
 }
 
 void AbstractClient::setOnAllDesktops(bool b)
 {
     if ((b && isOnAllDesktops()) ||
             (!b && !isOnAllDesktops()))
         return;
     if (b)
         setDesktop(NET::OnAllDesktops);
     else
         setDesktop(VirtualDesktopManager::self()->current());
 }
 
 bool AbstractClient::isShadeable() const
 {
     return false;
 }
 
 void AbstractClient::setShade(bool set)
 {
     set ? setShade(ShadeNormal) : setShade(ShadeNone);
 }
 
 void AbstractClient::setShade(ShadeMode mode)
 {
     Q_UNUSED(mode)
 }
 
 ShadeMode AbstractClient::shadeMode() const
 {
     return ShadeNone;
 }
 
 AbstractClient::Position AbstractClient::titlebarPosition() const
 {
     // TODO: still needed, remove?
     return PositionTop;
 }
 
 bool AbstractClient::titlebarPositionUnderMouse() const
 {
     if (!isDecorated()) {
         return false;
     }
     const auto sectionUnderMouse = decoration()->sectionUnderMouse();
     if (sectionUnderMouse == Qt::TitleBarArea) {
         return true;
     }
     // check other sections based on titlebarPosition
     switch (titlebarPosition()) {
     case AbstractClient::PositionTop:
         return (sectionUnderMouse == Qt::TopLeftSection || sectionUnderMouse == Qt::TopSection || sectionUnderMouse == Qt::TopRightSection);
     case AbstractClient::PositionLeft:
         return (sectionUnderMouse == Qt::TopLeftSection || sectionUnderMouse == Qt::LeftSection || sectionUnderMouse == Qt::BottomLeftSection);
     case AbstractClient::PositionRight:
         return (sectionUnderMouse == Qt::BottomRightSection || sectionUnderMouse == Qt::RightSection || sectionUnderMouse == Qt::TopRightSection);
     case AbstractClient::PositionBottom:
         return (sectionUnderMouse == Qt::BottomLeftSection || sectionUnderMouse == Qt::BottomSection || sectionUnderMouse == Qt::BottomRightSection);
     default:
         // nothing
         return false;
     }
 }
 
 void AbstractClient::setMinimized(bool set)
 {
     set ? minimize() : unminimize();
 }
 
 void AbstractClient::minimize(bool avoid_animation)
 {
     if (!isMinimizable() || isMinimized())
         return;
 
     if (isShade() && info) // NETWM restriction - KWindowInfo::isMinimized() == Hidden && !Shaded
         info->setState(0, NET::Shaded);
 
     m_minimized = true;
 
     doMinimize();
 
     updateWindowRules(Rules::Minimize);
     FocusChain::self()->update(this, FocusChain::MakeFirstMinimized);
     // TODO: merge signal with s_minimized
     emit clientMinimized(this, !avoid_animation);
     emit minimizedChanged();
 }
 
 void AbstractClient::unminimize(bool avoid_animation)
 {
     if (!isMinimized())
         return;
 
     if (rules()->checkMinimize(false)) {
         return;
     }
 
     if (isShade() && info) // NETWM restriction - KWindowInfo::isMinimized() == Hidden && !Shaded
         info->setState(NET::Shaded, NET::Shaded);
 
     m_minimized = false;
 
     doMinimize();
 
     updateWindowRules(Rules::Minimize);
     emit clientUnminimized(this, !avoid_animation);
     emit minimizedChanged();
 }
 
 void AbstractClient::doMinimize()
 {
 }
 
 QPalette AbstractClient::palette() const
 {
     if (!m_palette) {
         return QPalette();
     }
     return m_palette->palette();
 }
 
 const Decoration::DecorationPalette *AbstractClient::decorationPalette() const
 {
     return m_palette.get();
 }
 
 void AbstractClient::updateColorScheme(QString path)
 {
     if (path.isEmpty()) {
         path = QStringLiteral("kdeglobals");
     }
 
     if (!m_palette || m_colorScheme != path) {
         m_colorScheme = path;
 
         if (m_palette) {
             disconnect(m_palette.get(), &Decoration::DecorationPalette::changed, this, &AbstractClient::handlePaletteChange);
         }
 
         auto it = s_palettes.find(m_colorScheme);
 
         if (it == s_palettes.end() || it->expired()) {
             m_palette = std::make_shared<Decoration::DecorationPalette>(m_colorScheme);
             if (m_palette->isValid()) {
                 s_palettes[m_colorScheme] = m_palette;
             } else {
                 if (!s_defaultPalette) {
                     s_defaultPalette = std::make_shared<Decoration::DecorationPalette>(QStringLiteral("kdeglobals"));
                     s_palettes[QStringLiteral("kdeglobals")] = s_defaultPalette;
                 }
 
                 m_palette = s_defaultPalette;
             }
 
             if (m_colorScheme == QStringLiteral("kdeglobals")) {
                 s_defaultPalette = m_palette;
             }
         } else {
             m_palette = it->lock();
         }
 
         connect(m_palette.get(), &Decoration::DecorationPalette::changed, this, &AbstractClient::handlePaletteChange);
 
         emit paletteChanged(palette());
     }
 }
 
 void AbstractClient::handlePaletteChange()
 {
     emit paletteChanged(palette());
 }
 
 void AbstractClient::keepInArea(QRect area, bool partial)
 {
     if (partial) {
         // increase the area so that can have only 100 pixels in the area
         area.setLeft(qMin(area.left() - width() + 100, area.left()));
         area.setTop(qMin(area.top() - height() + 100, area.top()));
         area.setRight(qMax(area.right() + width() - 100, area.right()));
         area.setBottom(qMax(area.bottom() + height() - 100, area.bottom()));
     }
     if (!partial) {
         // resize to fit into area
         if (area.width() < width() || area.height() < height())
             resizeWithChecks(qMin(area.width(), width()), qMin(area.height(), height()));
     }
     int tx = x(), ty = y();
     if (geometry().right() > area.right() && width() <= area.width())
         tx = area.right() - width() + 1;
     if (geometry().bottom() > area.bottom() && height() <= area.height())
         ty = area.bottom() - height() + 1;
     if (!area.contains(geometry().topLeft())) {
         if (tx < area.x())
             tx = area.x();
         if (ty < area.y())
             ty = area.y();
     }
     if (tx != x() || ty != y())
         move(tx, ty);
 }
 
 QSize AbstractClient::maxSize() const
 {
     return rules()->checkMaxSize(QSize(INT_MAX, INT_MAX));
 }
 
 QSize AbstractClient::minSize() const
 {
     return rules()->checkMinSize(QSize(0, 0));
 }
 
 void AbstractClient::updateMoveResize(const QPointF &currentGlobalCursor)
 {
     handleMoveResize(pos(), currentGlobalCursor.toPoint());
 }
 
 bool AbstractClient::hasStrut() const
 {
     return false;
 }
 
 void AbstractClient::setupWindowManagementInterface()
 {
     if (m_windowManagementInterface) {
         // already setup
         return;
     }
     if (!waylandServer() || !surface()) {
         return;
     }
     if (!waylandServer()->windowManagement()) {
         return;
     }
     using namespace KWayland::Server;
     auto w = waylandServer()->windowManagement()->createWindow(waylandServer()->windowManagement());
     w->setTitle(caption());
     w->setVirtualDesktop(isOnAllDesktops() ? 0 : desktop() - 1);
     w->setActive(isActive());
     w->setFullscreen(isFullScreen());
     w->setKeepAbove(keepAbove());
     w->setKeepBelow(keepBelow());
     w->setMaximized(maximizeMode() == KWin::MaximizeFull);
     w->setMinimized(isMinimized());
     w->setOnAllDesktops(isOnAllDesktops());
     w->setDemandsAttention(isDemandingAttention());
     w->setCloseable(isCloseable());
     w->setMaximizeable(isMaximizable());
     w->setMinimizeable(isMinimizable());
     w->setFullscreenable(isFullScreenable());
     w->setIcon(icon());
     auto updateAppId = [this, w] {
         w->setAppId(QString::fromUtf8(m_desktopFileName.isEmpty() ? resourceName() : m_desktopFileName));
     };
     updateAppId();
     w->setSkipTaskbar(skipTaskbar());
     w->setShadeable(isShadeable());
     w->setShaded(isShade());
     w->setResizable(isResizable());
     w->setMovable(isMovable());
     w->setVirtualDesktopChangeable(true); // FIXME Matches Client::actionSupported(), but both should be implemented.
     w->setParentWindow(transientFor() ? transientFor()->windowManagementInterface() : nullptr);
     w->setGeometry(geom);
     connect(this, &AbstractClient::skipTaskbarChanged, w,
         [w, this] {
             w->setSkipTaskbar(skipTaskbar());
         }
     );
     connect(this, &AbstractClient::captionChanged, w, [w, this] { w->setTitle(caption()); });
     connect(this, &AbstractClient::desktopChanged, w,
         [w, this] {
             if (isOnAllDesktops()) {
                 w->setOnAllDesktops(true);
                 return;
             }
             w->setVirtualDesktop(desktop() - 1);
             w->setOnAllDesktops(false);
         }
     );
     connect(this, &AbstractClient::activeChanged, w, [w, this] { w->setActive(isActive()); });
     connect(this, &AbstractClient::fullScreenChanged, w, [w, this] { w->setFullscreen(isFullScreen()); });
     connect(this, &AbstractClient::keepAboveChanged, w, &PlasmaWindowInterface::setKeepAbove);
     connect(this, &AbstractClient::keepBelowChanged, w, &PlasmaWindowInterface::setKeepBelow);
     connect(this, &AbstractClient::minimizedChanged, w, [w, this] { w->setMinimized(isMinimized()); });
     connect(this, static_cast<void (AbstractClient::*)(AbstractClient*,MaximizeMode)>(&AbstractClient::clientMaximizedStateChanged), w,
         [w] (KWin::AbstractClient *c, MaximizeMode mode) {
             Q_UNUSED(c);
             w->setMaximized(mode == KWin::MaximizeFull);
         }
     );
     connect(this, &AbstractClient::demandsAttentionChanged, w, [w, this] { w->setDemandsAttention(isDemandingAttention()); });
     connect(this, &AbstractClient::iconChanged, w,
         [w, this] {
             w->setIcon(icon());
         }
     );
     connect(this, &AbstractClient::windowClassChanged, w, updateAppId);
     connect(this, &AbstractClient::desktopFileNameChanged, w, updateAppId);
     connect(this, &AbstractClient::shadeChanged, w, [w, this] { w->setShaded(isShade()); });
     connect(this, &AbstractClient::transientChanged, w,
         [w, this] {
             w->setParentWindow(transientFor() ? transientFor()->windowManagementInterface() : nullptr);
         }
     );
     connect(this, &AbstractClient::geometryChanged, w,
         [w, this] {
             w->setGeometry(geom);
         }
     );
     connect(w, &PlasmaWindowInterface::closeRequested, this, [this] { closeWindow(); });
     connect(w, &PlasmaWindowInterface::moveRequested, this,
         [this] {
             Cursor::setPos(geometry().center());
             performMouseCommand(Options::MouseMove, Cursor::pos());
         }
     );
     connect(w, &PlasmaWindowInterface::resizeRequested, this,
         [this] {
             Cursor::setPos(geometry().bottomRight());
             performMouseCommand(Options::MouseResize, Cursor::pos());
         }
     );
     connect(w, &PlasmaWindowInterface::virtualDesktopRequested, this,
         [this] (quint32 desktop) {
             workspace()->sendClientToDesktop(this, desktop + 1, true);
         }
     );
     connect(w, &PlasmaWindowInterface::fullscreenRequested, this,
         [this] (bool set) {
             setFullScreen(set, false);
         }
     );
     connect(w, &PlasmaWindowInterface::minimizedRequested, this,
         [this] (bool set) {
             if (set) {
                 minimize();
             } else {
                 unminimize();
             }
         }
     );
     connect(w, &PlasmaWindowInterface::maximizedRequested, this,
         [this] (bool set) {
             maximize(set ? MaximizeFull : MaximizeRestore);
         }
     );
     connect(w, &PlasmaWindowInterface::keepAboveRequested, this,
         [this] (bool set) {
             setKeepAbove(set);
         }
     );
     connect(w, &PlasmaWindowInterface::keepBelowRequested, this,
         [this] (bool set) {
             setKeepBelow(set);
         }
     );
     connect(w, &PlasmaWindowInterface::demandsAttentionRequested, this,
         [this] (bool set) {
             demandAttention(set);
         }
     );
     connect(w, &PlasmaWindowInterface::activeRequested, this,
         [this] (bool set) {
             if (set) {
                 workspace()->activateClient(this, true);
             }
         }
     );
     connect(w, &PlasmaWindowInterface::shadedRequested, this,
         [this] (bool set) {
             setShade(set);
         }
     );
     m_windowManagementInterface = w;
 }
 
 void AbstractClient::destroyWindowManagementInterface()
 {
     if (m_windowManagementInterface) {
         m_windowManagementInterface->unmap();
         m_windowManagementInterface = nullptr;
     }
 }
 
 Options::MouseCommand AbstractClient::getMouseCommand(Qt::MouseButton button, bool *handled) const
 {
     *handled = false;
     if (button == Qt::NoButton) {
         return Options::MouseNothing;
     }
     if (isActive()) {
         if (options->isClickRaise()) {
             *handled = true;
             return Options::MouseActivateRaiseAndPassClick;
         }
     } else {
         *handled = true;
         switch (button) {
         case Qt::LeftButton:
             return options->commandWindow1();
         case Qt::MiddleButton:
             return options->commandWindow2();
         case Qt::RightButton:
             return options->commandWindow3();
         default:
             // all other buttons pass Activate & Pass Client
             return Options::MouseActivateAndPassClick;
         }
     }
     return Options::MouseNothing;
 }
 
 Options::MouseCommand AbstractClient::getWheelCommand(Qt::Orientation orientation, bool *handled) const
 {
     *handled = false;
     if (orientation != Qt::Vertical) {
         return Options::MouseNothing;
     }
     if (!isActive()) {
         *handled = true;
         return options->commandWindowWheel();
     }
     return Options::MouseNothing;
 }
 
 bool AbstractClient::performMouseCommand(Options::MouseCommand cmd, const QPoint &globalPos)
 {
     bool replay = false;
     switch(cmd) {
     case Options::MouseRaise:
         workspace()->raiseClient(this);
         break;
     case Options::MouseLower: {
         workspace()->lowerClient(this);
         // used to be activateNextClient(this), then topClientOnDesktop
         // since this is a mouseOp it's however safe to use the client under the mouse instead
         if (isActive() && options->focusPolicyIsReasonable()) {
             AbstractClient *next = workspace()->clientUnderMouse(screen());
             if (next && next != this)
                 workspace()->requestFocus(next, false);
         }
         break;
     }
     case Options::MouseOperationsMenu:
         if (isActive() && options->isClickRaise())
             autoRaise();
         workspace()->showWindowMenu(QRect(globalPos, globalPos), this);
         break;
     case Options::MouseToggleRaiseAndLower:
         workspace()->raiseOrLowerClient(this);
         break;
     case Options::MouseActivateAndRaise: {
         replay = isActive(); // for clickraise mode
         bool mustReplay = !rules()->checkAcceptFocus(acceptsFocus());
         if (mustReplay) {
             ToplevelList::const_iterator  it = workspace()->stackingOrder().constEnd(),
                                      begin = workspace()->stackingOrder().constBegin();
             while (mustReplay && --it != begin && *it != this) {
                 AbstractClient *c = qobject_cast<AbstractClient*>(*it);
                 if (!c || (c->keepAbove() && !keepAbove()) || (keepBelow() && !c->keepBelow()))
                     continue; // can never raise above "it"
                 mustReplay = !(c->isOnCurrentDesktop() && c->isOnCurrentActivity() && c->geometry().intersects(geometry()));
             }
         }
         workspace()->takeActivity(this, Workspace::ActivityFocus | Workspace::ActivityRaise);
         screens()->setCurrent(globalPos);
         replay = replay || mustReplay;
         break;
     }
     case Options::MouseActivateAndLower:
         workspace()->requestFocus(this);
         workspace()->lowerClient(this);
         screens()->setCurrent(globalPos);
         replay = replay || !rules()->checkAcceptFocus(acceptsFocus());
         break;
     case Options::MouseActivate:
         replay = isActive(); // for clickraise mode
         workspace()->takeActivity(this, Workspace::ActivityFocus);
         screens()->setCurrent(globalPos);
         replay = replay || !rules()->checkAcceptFocus(acceptsFocus());
         break;
     case Options::MouseActivateRaiseAndPassClick:
         workspace()->takeActivity(this, Workspace::ActivityFocus | Workspace::ActivityRaise);
         screens()->setCurrent(globalPos);
         replay = true;
         break;
     case Options::MouseActivateAndPassClick:
         workspace()->takeActivity(this, Workspace::ActivityFocus);
         screens()->setCurrent(globalPos);
         replay = true;
         break;
     case Options::MouseMaximize:
         maximize(MaximizeFull);
         break;
     case Options::MouseRestore:
         maximize(MaximizeRestore);
         break;
     case Options::MouseMinimize:
         minimize();
         break;
     case Options::MouseAbove: {
         StackingUpdatesBlocker blocker(workspace());
         if (keepBelow())
             setKeepBelow(false);
         else
             setKeepAbove(true);
         break;
     }
     case Options::MouseBelow: {
         StackingUpdatesBlocker blocker(workspace());
         if (keepAbove())
             setKeepAbove(false);
         else
             setKeepBelow(true);
         break;
     }
     case Options::MousePreviousDesktop:
         workspace()->windowToPreviousDesktop(this);
         break;
     case Options::MouseNextDesktop:
         workspace()->windowToNextDesktop(this);
         break;
     case Options::MouseOpacityMore:
         if (!isDesktop())   // No point in changing the opacity of the desktop
             setOpacity(qMin(opacity() + 0.1, 1.0));
         break;
     case Options::MouseOpacityLess:
         if (!isDesktop())   // No point in changing the opacity of the desktop
             setOpacity(qMax(opacity() - 0.1, 0.1));
         break;
     case Options::MousePreviousTab:
         if (tabGroup())
             tabGroup()->activatePrev();
     break;
     case Options::MouseNextTab:
         if (tabGroup())
             tabGroup()->activateNext();
     break;
     case Options::MouseClose:
         closeWindow();
         break;
     case Options::MouseActivateRaiseAndMove:
     case Options::MouseActivateRaiseAndUnrestrictedMove:
         workspace()->raiseClient(this);
         workspace()->requestFocus(this);
         screens()->setCurrent(globalPos);
         // fallthrough
     case Options::MouseMove:
     case Options::MouseUnrestrictedMove: {
         if (!isMovableAcrossScreens())
             break;
         if (isMoveResize())
             finishMoveResize(false);
         setMoveResizePointerMode(PositionCenter);
         setMoveResizePointerButtonDown(true);
         setMoveOffset(QPoint(globalPos.x() - x(), globalPos.y() - y()));  // map from global
         setInvertedMoveOffset(rect().bottomRight() - moveOffset());
         setUnrestrictedMoveResize((cmd == Options::MouseActivateRaiseAndUnrestrictedMove
                                   || cmd == Options::MouseUnrestrictedMove));
         if (!startMoveResize())
             setMoveResizePointerButtonDown(false);
         updateCursor();
         break;
     }
     case Options::MouseResize:
     case Options::MouseUnrestrictedResize: {
         if (!isResizable() || isShade())
             break;
         if (isMoveResize())
             finishMoveResize(false);
         setMoveResizePointerButtonDown(true);
         const QPoint moveOffset = QPoint(globalPos.x() - x(), globalPos.y() - y());  // map from global
         setMoveOffset(moveOffset);
         int x = moveOffset.x(), y = moveOffset.y();
         bool left = x < width() / 3;
         bool right = x >= 2 * width() / 3;
         bool top = y < height() / 3;
         bool bot = y >= 2 * height() / 3;
         Position mode;
         if (top)
             mode = left ? PositionTopLeft : (right ? PositionTopRight : PositionTop);
         else if (bot)
             mode = left ? PositionBottomLeft : (right ? PositionBottomRight : PositionBottom);
         else
             mode = (x < width() / 2) ? PositionLeft : PositionRight;
         setMoveResizePointerMode(mode);
         setInvertedMoveOffset(rect().bottomRight() - moveOffset);
         setUnrestrictedMoveResize((cmd == Options::MouseUnrestrictedResize));
         if (!startMoveResize())
             setMoveResizePointerButtonDown(false);
         updateCursor();
         break;
     }
     case Options::MouseDragTab:
     case Options::MouseNothing:
     default:
         replay = true;
         break;
     }
     return replay;
 }
 
 void AbstractClient::setTransientFor(AbstractClient *transientFor)
 {
     if (transientFor == this) {
         // cannot be transient for one self
         return;
     }
     if (m_transientFor == transientFor) {
         return;
     }
     m_transientFor = transientFor;
     emit transientChanged();
 }
 
 const AbstractClient *AbstractClient::transientFor() const
 {
     return m_transientFor;
 }
 
 AbstractClient *AbstractClient::transientFor()
 {
     return m_transientFor;
 }
 
 bool AbstractClient::hasTransientPlacementHint() const
 {
     return false;
 }
 
 QPoint AbstractClient::transientPlacementHint() const
 {
     return QPoint();
 }
 
 bool AbstractClient::hasTransient(const AbstractClient *c, bool indirect) const
 {
     Q_UNUSED(indirect);
     return c->transientFor() == this;
 }
 
 QList< AbstractClient* > AbstractClient::mainClients() const
 {
     if (const AbstractClient *t = transientFor()) {
         return QList<AbstractClient*>{const_cast< AbstractClient* >(t)};
     }
     return QList<AbstractClient*>();
 }
 
 QList<AbstractClient*> AbstractClient::allMainClients() const
 {
     auto result = mainClients();
     foreach (const auto *cl, result) {
         result += cl->allMainClients();
     }
     return result;
 }
 
 void AbstractClient::setModal(bool m)
 {
     // Qt-3.2 can have even modal normal windows :(
     if (m_modal == m)
         return;
     m_modal = m;
     emit modalChanged();
     // Changing modality for a mapped window is weird (?)
     // _NET_WM_STATE_MODAL should possibly rather be _NET_WM_WINDOW_TYPE_MODAL_DIALOG
 }
 
 bool AbstractClient::isModal() const
 {
     return m_modal;
 }
 
 void AbstractClient::addTransient(AbstractClient *cl)
 {
     assert(!m_transients.contains(cl));
     assert(cl != this);
     m_transients.append(cl);
 }
 
 void AbstractClient::removeTransient(AbstractClient *cl)
 {
     m_transients.removeAll(cl);
     if (cl->transientFor() == this) {
         cl->setTransientFor(nullptr);
     }
 }
 
 void AbstractClient::removeTransientFromList(AbstractClient *cl)
 {
     m_transients.removeAll(cl);
 }
 
 bool AbstractClient::isActiveFullScreen() const
 {
     if (!isFullScreen())
         return false;
 
     const auto ac = workspace()->mostRecentlyActivatedClient(); // instead of activeClient() - avoids flicker
     // according to NETWM spec implementation notes suggests
     // "focused windows having state _NET_WM_STATE_FULLSCREEN" to be on the highest layer.
     // we'll also take the screen into account
     return ac && (ac == this || ac->screen() != screen());
 }
 
 #define BORDER(which) \
     int AbstractClient::border##which() const \
     { \
         return isDecorated() ? decoration()->border##which() : 0; \
     }
 
 BORDER(Bottom)
 BORDER(Left)
 BORDER(Right)
 BORDER(Top)
 #undef BORDER
 
 QSize AbstractClient::sizeForClientSize(const QSize &wsize, Sizemode mode, bool noframe) const
 {
     Q_UNUSED(mode)
     Q_UNUSED(noframe)
     return wsize + QSize(borderLeft() + borderRight(), borderTop() + borderBottom());
 }
 
 void AbstractClient::addRepaintDuringGeometryUpdates()
 {
     const QRect deco_rect = visibleRect();
     addLayerRepaint(m_visibleRectBeforeGeometryUpdate);
     addLayerRepaint(deco_rect);   // trigger repaint of window's new location
     m_visibleRectBeforeGeometryUpdate = deco_rect;
 }
 
 void AbstractClient::updateGeometryBeforeUpdateBlocking()
 {
     m_geometryBeforeUpdateBlocking = geom;
 }
 
 void AbstractClient::updateTabGroupStates(TabGroup::States)
 {
 }
 
 void AbstractClient::doMove(int, int)
 {
 }
 
 void AbstractClient::updateInitialMoveResizeGeometry()
 {
     m_moveResize.initialGeometry = geometry();
     m_moveResize.geometry = m_moveResize.initialGeometry;
     m_moveResize.startScreen = screen();
 }
 
 void AbstractClient::updateCursor()
 {
     Position m = moveResizePointerMode();
     if (!isResizable() || isShade())
         m = PositionCenter;
     Qt::CursorShape c = Qt::ArrowCursor;
     switch(m) {
     case PositionTopLeft:
     case PositionBottomRight:
         c = Qt::SizeFDiagCursor;
         break;
     case PositionBottomLeft:
     case PositionTopRight:
         c = Qt::SizeBDiagCursor;
         break;
     case PositionTop:
     case PositionBottom:
         c = Qt::SizeVerCursor;
         break;
     case PositionLeft:
     case PositionRight:
         c = Qt::SizeHorCursor;
         break;
     default:
         if (isMoveResize())
             c = Qt::SizeAllCursor;
         else
             c = Qt::ArrowCursor;
         break;
     }
     if (c == m_moveResize.cursor)
         return;
     m_moveResize.cursor = c;
     emit moveResizeCursorChanged(c);
 }
 
 void AbstractClient::leaveMoveResize()
 {
     workspace()->setClientIsMoving(nullptr);
     setMoveResize(false);
     if (ScreenEdges::self()->isDesktopSwitchingMovingClients())
         ScreenEdges::self()->reserveDesktopSwitching(false, Qt::Vertical|Qt::Horizontal);
     if (isElectricBorderMaximizing()) {
         outline()->hide();
         elevate(false);
     }
 }
 
 bool AbstractClient::s_haveResizeEffect = false;
 
 void AbstractClient::updateHaveResizeEffect()
 {
     s_haveResizeEffect = effects && static_cast<EffectsHandlerImpl*>(effects)->provides(Effect::Resize);
 }
 
 bool AbstractClient::doStartMoveResize()
 {
     return true;
 }
 
 void AbstractClient::positionGeometryTip()
 {
 }
 
 void AbstractClient::doPerformMoveResize()
 {
 }
 
 bool AbstractClient::isWaitingForMoveResizeSync() const
 {
     return false;
 }
 
 void AbstractClient::doResizeSync()
 {
 }
 
 void AbstractClient::checkQuickTilingMaximizationZones(int xroot, int yroot)
 {
     QuickTileMode mode = QuickTileNone;
     bool innerBorder = false;
     for (int i=0; i < screens()->count(); ++i) {
 
         if (!screens()->geometry(i).contains(QPoint(xroot, yroot)))
             continue;
 
         auto isInScreen = [i](const QPoint &pt) {
             for (int j = 0; j < screens()->count(); ++j) {
                 if (j == i)
                     continue;
                 if (screens()->geometry(j).contains(pt)) {
                     return true;
                 }
             }
             return false;
         };
 
         QRect area = workspace()->clientArea(MaximizeArea, QPoint(xroot, yroot), desktop());
         if (options->electricBorderTiling()) {
             if (xroot <= area.x() + 20) {
                 mode |= QuickTileLeft;
                 innerBorder = isInScreen(QPoint(area.x() - 1, yroot));
             } else if (xroot >= area.x() + area.width() - 20) {
                 mode |= QuickTileRight;
                 innerBorder = isInScreen(QPoint(area.right() + 1, yroot));
             }
         }
 
         if (mode != QuickTileNone) {
             if (yroot <= area.y() + area.height() * options->electricBorderCornerRatio())
                 mode |= QuickTileTop;
             else if (yroot >= area.y() + area.height() - area.height()  * options->electricBorderCornerRatio())
                 mode |= QuickTileBottom;
         } else if (options->electricBorderMaximize() && yroot <= area.y() + 5 && isMaximizable()) {
             mode = QuickTileMaximize;
             innerBorder = isInScreen(QPoint(xroot, area.y() - 1));
         }
         break; // no point in checking other screens to contain this... "point"...
     }
     if (mode != electricBorderMode()) {
         setElectricBorderMode(mode);
         if (innerBorder) {
             if (!m_electricMaximizingDelay) {
                 m_electricMaximizingDelay = new QTimer(this);
                 m_electricMaximizingDelay->setInterval(250);
                 m_electricMaximizingDelay->setSingleShot(true);
                 connect(m_electricMaximizingDelay, &QTimer::timeout, [this]() {
                     if (isMove())
                         setElectricBorderMaximizing(electricBorderMode() != QuickTileNone);
                 });
             }
             m_electricMaximizingDelay->start();
         } else {
             setElectricBorderMaximizing(mode != QuickTileNone);
         }
     }
 }
 
 void AbstractClient::keyPressEvent(uint key_code)
 {
     if (!isMove() && !isResize())
         return;
     bool is_control = key_code & Qt::CTRL;
     bool is_alt = key_code & Qt::ALT;
     key_code = key_code & ~Qt::KeyboardModifierMask;
     int delta = is_control ? 1 : is_alt ? 32 : 8;
     QPoint pos = Cursor::pos();
     switch(key_code) {
     case Qt::Key_Left:
         pos.rx() -= delta;
         break;
     case Qt::Key_Right:
         pos.rx() += delta;
         break;
     case Qt::Key_Up:
         pos.ry() -= delta;
         break;
     case Qt::Key_Down:
         pos.ry() += delta;
         break;
     case Qt::Key_Space:
     case Qt::Key_Return:
     case Qt::Key_Enter:
         finishMoveResize(false);
         setMoveResizePointerButtonDown(false);
         updateCursor();
         break;
     case Qt::Key_Escape:
         finishMoveResize(true);
         setMoveResizePointerButtonDown(false);
         updateCursor();
         break;
     default:
         return;
     }
     Cursor::setPos(pos);
 }
 
 QSize AbstractClient::resizeIncrements() const
 {
     return QSize(1, 1);
 }
 
 void AbstractClient::dontMoveResize()
 {
     setMoveResizePointerButtonDown(false);
     stopDelayedMoveResize();
     if (isMoveResize())
         finishMoveResize(false);
 }
 
 AbstractClient::Position AbstractClient::mousePosition() const
 {
     if (isDecorated()) {
         switch (decoration()->sectionUnderMouse()) {
             case Qt::BottomLeftSection:
                 return PositionBottomLeft;
             case Qt::BottomRightSection:
                 return PositionBottomRight;
             case Qt::BottomSection:
                 return PositionBottom;
             case Qt::LeftSection:
                 return PositionLeft;
             case Qt::RightSection:
                 return PositionRight;
             case Qt::TopSection:
                 return PositionTop;
             case Qt::TopLeftSection:
                 return PositionTopLeft;
             case Qt::TopRightSection:
                 return PositionTopRight;
             default:
                 return PositionCenter;
         }
     }
     return PositionCenter;
 }
 
 void AbstractClient::endMoveResize()
 {
     setMoveResizePointerButtonDown(false);
     stopDelayedMoveResize();
     if (isMoveResize()) {
         finishMoveResize(false);
         setMoveResizePointerMode(mousePosition());
     }
     updateCursor();
 }
 
 void AbstractClient::destroyDecoration()
 {
     delete m_decoration.decoration;
     m_decoration.decoration = nullptr;
 }
 
 bool AbstractClient::decorationHasAlpha() const
 {
     if (!isDecorated() || decoration()->isOpaque()) {
         // either no decoration or decoration has alpha disabled
         return false;
     }
     return true;
 }
 
 void AbstractClient::triggerDecorationRepaint()
 {
     if (isDecorated()) {
         decoration()->update();
     }
 }
 
 void AbstractClient::layoutDecorationRects(QRect &left, QRect &top, QRect &right, QRect &bottom) const
 {
     if (!isDecorated()) {
         return;
     }
     QRect r = decoration()->rect();
 
     top = QRect(r.x(), r.y(), r.width(), borderTop());
     bottom = QRect(r.x(), r.y() + r.height() - borderBottom(),
                    r.width(), borderBottom());
     left = QRect(r.x(), r.y() + top.height(),
                  borderLeft(), r.height() - top.height() - bottom.height());
     right = QRect(r.x() + r.width() - borderRight(), r.y() + top.height(),
                   borderRight(), r.height() - top.height() - bottom.height());
 }
 
 void AbstractClient::processDecorationMove(const QPoint &localPos, const QPoint &globalPos)
 {
     if (isMoveResizePointerButtonDown()) {
         handleMoveResize(localPos.x(), localPos.y(), globalPos.x(), globalPos.y());
         return;
     }
     // TODO: handle modifiers
     Position newmode = mousePosition();
     if (newmode != moveResizePointerMode()) {
         setMoveResizePointerMode(newmode);
         updateCursor();
     }
 }
 
 bool AbstractClient::processDecorationButtonPress(QMouseEvent *event, bool ignoreMenu)
 {
     Options::MouseCommand com = Options::MouseNothing;
     bool active = isActive();
     if (!wantsInput())    // we cannot be active, use it anyway
         active = true;
 
     // check whether it is a double click
     if (event->button() == Qt::LeftButton && titlebarPositionUnderMouse()) {
         if (m_decoration.doubleClickTimer.isValid()) {
             const qint64 interval = m_decoration.doubleClickTimer.elapsed();
             m_decoration.doubleClickTimer.invalidate();
             if (interval > QGuiApplication::styleHints()->mouseDoubleClickInterval()) {
                 m_decoration.doubleClickTimer.invalidate(); // expired -> new first click and pot. init
             } else {
                 Workspace::self()->performWindowOperation(this, options->operationTitlebarDblClick());
                 dontMoveResize();
                 return false;
             }
         }
          else {
             m_decoration.doubleClickTimer.start(); // new first click and pot. init, could be invalidated by release - see below
         }
     }
 
     if (event->button() == Qt::LeftButton)
         com = active ? options->commandActiveTitlebar1() : options->commandInactiveTitlebar1();
     else if (event->button() == Qt::MidButton)
         com = active ? options->commandActiveTitlebar2() : options->commandInactiveTitlebar2();
     else if (event->button() == Qt::RightButton)
         com = active ? options->commandActiveTitlebar3() : options->commandInactiveTitlebar3();
     if (event->button() == Qt::LeftButton
             && com != Options::MouseOperationsMenu // actions where it's not possible to get the matching
             && com != Options::MouseMinimize  // mouse release event
             && com != Options::MouseDragTab) {
         setMoveResizePointerMode(mousePosition());
         setMoveResizePointerButtonDown(true);
         setMoveOffset(event->pos());
         setInvertedMoveOffset(rect().bottomRight() - moveOffset());
         setUnrestrictedMoveResize(false);
         startDelayedMoveResize();
         updateCursor();
     }
     // In the new API the decoration may process the menu action to display an inactive tab's menu.
     // If the event is unhandled then the core will create one for the active window in the group.
     if (!ignoreMenu || com != Options::MouseOperationsMenu)
         performMouseCommand(com, event->globalPos());
     return !( // Return events that should be passed to the decoration in the new API
                com == Options::MouseRaise ||
                com == Options::MouseOperationsMenu ||
                com == Options::MouseActivateAndRaise ||
                com == Options::MouseActivate ||
                com == Options::MouseActivateRaiseAndPassClick ||
                com == Options::MouseActivateAndPassClick ||
                com == Options::MouseDragTab ||
                com == Options::MouseNothing);
 }
 
 void AbstractClient::processDecorationButtonRelease(QMouseEvent *event)
 {
     if (isDecorated()) {
         if (event->isAccepted() || !titlebarPositionUnderMouse()) {
             invalidateDecorationDoubleClickTimer(); // click was for the deco and shall not init a doubleclick
         }
     }
 
     if (event->buttons() == Qt::NoButton) {
         setMoveResizePointerButtonDown(false);
         stopDelayedMoveResize();
         if (isMoveResize()) {
             finishMoveResize(false);
             setMoveResizePointerMode(mousePosition());
         }
         updateCursor();
     }
 }
 
 
 void AbstractClient::startDecorationDoubleClickTimer()
 {
     m_decoration.doubleClickTimer.start();
 }
 
 void AbstractClient::invalidateDecorationDoubleClickTimer()
 {
     m_decoration.doubleClickTimer.invalidate();
 }
 
 bool AbstractClient::providesContextHelp() const
 {
     return false;
 }
 
 void AbstractClient::showContextHelp()
 {
 }
 
 QPointer<Decoration::DecoratedClientImpl> AbstractClient::decoratedClient() const
 {
     return m_decoration.client;
 }
 
 void AbstractClient::setDecoratedClient(QPointer< Decoration::DecoratedClientImpl > client)
 {
     m_decoration.client = client;
 }
 
 void AbstractClient::enterEvent(const QPoint &globalPos)
 {
     // TODO: shade hover
     if (options->focusPolicy() == Options::ClickToFocus || workspace()->userActionsMenu()->isShown())
         return;
 
     if (options->isAutoRaise() && !isDesktop() &&
             !isDock() && workspace()->focusChangeEnabled() &&
             globalPos != workspace()->focusMousePosition() &&
             workspace()->topClientOnDesktop(VirtualDesktopManager::self()->current(),
                                             options->isSeparateScreenFocus() ? screen() : -1) != this) {
         startAutoRaise();
     }
 
     if (isDesktop() || isDock())
         return;
     // for FocusFollowsMouse, change focus only if the mouse has actually been moved, not if the focus
     // change came because of window changes (e.g. closing a window) - #92290
     if (options->focusPolicy() != Options::FocusFollowsMouse
             || globalPos != workspace()->focusMousePosition()) {
         workspace()->requestDelayFocus(this);
     }
 }
 
 void AbstractClient::leaveEvent()
 {
     cancelAutoRaise();
     workspace()->cancelDelayFocus();
     // TODO: shade hover
     // TODO: send hover leave to deco
     // TODO: handle Options::FocusStrictlyUnderMouse
 }
 
 QRect AbstractClient::iconGeometry() const
 {
     if (!windowManagementInterface() || !waylandServer()) {
         // window management interface is only available if the surface is mapped
         return QRect();
     }
 
     int minDistance = INT_MAX;
     AbstractClient *candidatePanel = nullptr;
     QRect candidateGeom;
 
     for (auto i = windowManagementInterface()->minimizedGeometries().constBegin(), end = windowManagementInterface()->minimizedGeometries().constEnd(); i != end; ++i) {
         AbstractClient *client = waylandServer()->findAbstractClient(i.key());
         if (!client) {
             continue;
         }
         const int distance = QPoint(client->pos() - pos()).manhattanLength();
         if (distance < minDistance) {
             minDistance = distance;
             candidatePanel = client;
             candidateGeom = i.value();
         }
     }
     if (!candidatePanel) {
         return QRect();
     }
     return candidateGeom.translated(candidatePanel->pos());
 }
 
 QRect AbstractClient::inputGeometry() const
 {
     if (isDecorated()) {
         return Toplevel::inputGeometry() + decoration()->resizeOnlyBorders();
     }
     return Toplevel::inputGeometry();
 }
 
 bool AbstractClient::dockWantsInput() const
 {
     return false;
 }
 
 void AbstractClient::setDesktopFileName(const QByteArray &name)
 {
     if (name == m_desktopFileName) {
         return;
     }
     m_desktopFileName = name;
     emit desktopFileNameChanged();
 }
 
 QString AbstractClient::iconFromDesktopFile() const
 {
     if (m_desktopFileName.isEmpty()) {
         return QString();
     }
     QString desktopFile = QString::fromUtf8(m_desktopFileName);
     if (!desktopFile.endsWith(QLatin1String(".desktop"))) {
         desktopFile.append(QLatin1String(".desktop"));
     }
     KDesktopFile df(desktopFile);
     return df.readIcon();
 }
 
 bool AbstractClient::hasApplicationMenu() const
 {
     return ApplicationMenu::self()->applicationMenuEnabled() && !m_applicationMenuServiceName.isEmpty() && !m_applicationMenuObjectPath.isEmpty();
 }
 
 void AbstractClient::updateApplicationMenuServiceName(const QString &serviceName)
 {
     const bool old_hasApplicationMenu = hasApplicationMenu();
 
     m_applicationMenuServiceName = serviceName;
 
     const bool new_hasApplicationMenu = hasApplicationMenu();
 
     if (old_hasApplicationMenu != new_hasApplicationMenu) {
         emit hasApplicationMenuChanged(new_hasApplicationMenu);
     }
 }
 
 void AbstractClient::updateApplicationMenuObjectPath(const QString &objectPath)
 {
     const bool old_hasApplicationMenu = hasApplicationMenu();
 
     m_applicationMenuObjectPath = objectPath;
 
     const bool new_hasApplicationMenu = hasApplicationMenu();
 
     if (old_hasApplicationMenu != new_hasApplicationMenu) {
         emit hasApplicationMenuChanged(new_hasApplicationMenu);
     }
 }
 
 void AbstractClient::setApplicationMenuActive(bool applicationMenuActive)
 {
     if (m_applicationMenuActive != applicationMenuActive) {
         m_applicationMenuActive = applicationMenuActive;
         emit applicationMenuActiveChanged(applicationMenuActive);
     }
 }
 
 void AbstractClient::showApplicationMenu(int actionId)
 {
     if (isDecorated()) {
         decoration()->showApplicationMenu(actionId);
     } else {
         // we don't know where the application menu button will be, show it in the top left corner instead
         Workspace::self()->showApplicationMenu(QRect(), this, actionId);
     }
 }
 
+bool AbstractClient::unresponsive() const
+{
+    return m_unresponsive;
+}
+
+void AbstractClient::setUnresponsive(bool unresponsive)
+{
+    if (m_unresponsive != unresponsive) {
+        m_unresponsive = unresponsive;
+        emit unresponsiveChanged(m_unresponsive);
+        emit captionChanged();
+    }
+}
+
 }
diff --git a/abstract_client.h b/abstract_client.h
index e509fac93..e34dbd111 100644
--- a/abstract_client.h
+++ b/abstract_client.h
@@ -1,1125 +1,1140 @@
 /********************************************************************
  KWin - the KDE window manager
  This file is part of the KDE project.
 
 Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 #ifndef KWIN_ABSTRACT_CLIENT_H
 #define KWIN_ABSTRACT_CLIENT_H
 
 #include "toplevel.h"
 #include "options.h"
 #include "rules.h"
 #include "tabgroup.h"
 
 #include <memory>
 
 #include <QElapsedTimer>
 #include <QPointer>
 
 namespace KWayland
 {
 namespace Server
 {
 class PlasmaWindowInterface;
 }
 }
 
 namespace KDecoration2
 {
 class Decoration;
 }
 
 namespace KWin
 {
 
 namespace TabBox
 {
 class TabBoxClientImpl;
 }
 
 namespace Decoration
 {
 class DecoratedClientImpl;
 class DecorationPalette;
 }
 
 class KWIN_EXPORT AbstractClient : public Toplevel
 {
     Q_OBJECT
     /**
      * Whether this Client is fullScreen. A Client might either be fullScreen due to the _NET_WM property
      * or through a legacy support hack. The fullScreen state can only be changed if the Client does not
      * use the legacy hack. To be sure whether the state changed, connect to the notify signal.
      **/
     Q_PROPERTY(bool fullScreen READ isFullScreen WRITE setFullScreen NOTIFY fullScreenChanged)
     /**
      * Whether the Client can be set to fullScreen. The property is evaluated each time it is invoked.
      * Because of that there is no notify signal.
      **/
     Q_PROPERTY(bool fullScreenable READ isFullScreenable)
     /**
      * Whether this Client is the currently visible Client in its Client Group (Window Tabs).
      * For change connect to the visibleChanged signal on the Client's Group.
      **/
     Q_PROPERTY(bool isCurrentTab READ isCurrentTab)
     /**
      * Whether this Client is active or not. Use Workspace::activateClient() to activate a Client.
      * @see Workspace::activateClient
      **/
     Q_PROPERTY(bool active READ isActive NOTIFY activeChanged)
     /**
      * The desktop this Client is on. If the Client is on all desktops the property has value -1.
      **/
     Q_PROPERTY(int desktop READ desktop WRITE setDesktop NOTIFY desktopChanged)
     /**
      * Whether the Client is on all desktops. That is desktop is -1.
      **/
     Q_PROPERTY(bool onAllDesktops READ isOnAllDesktops WRITE setOnAllDesktops NOTIFY desktopChanged)
     /**
      * Indicates that the window should not be included on a taskbar.
      **/
     Q_PROPERTY(bool skipTaskbar READ skipTaskbar WRITE setSkipTaskbar NOTIFY skipTaskbarChanged)
     /**
      * Indicates that the window should not be included on a Pager.
      **/
     Q_PROPERTY(bool skipPager READ skipPager WRITE setSkipPager NOTIFY skipPagerChanged)
     /**
      * Whether the Client should be excluded from window switching effects.
      **/
     Q_PROPERTY(bool skipSwitcher READ skipSwitcher WRITE setSkipSwitcher NOTIFY skipSwitcherChanged)
     /**
      * Whether the window can be closed by the user. The value is evaluated each time the getter is called.
      * Because of that no changed signal is provided.
      **/
     Q_PROPERTY(bool closeable READ isCloseable)
     Q_PROPERTY(QIcon icon READ icon NOTIFY iconChanged)
     /**
      * Whether the Client is set to be kept above other windows.
      **/
     Q_PROPERTY(bool keepAbove READ keepAbove WRITE setKeepAbove NOTIFY keepAboveChanged)
     /**
      * Whether the Client is set to be kept below other windows.
      **/
     Q_PROPERTY(bool keepBelow READ keepBelow WRITE setKeepBelow NOTIFY keepBelowChanged)
     /**
      * Whether the Client can be shaded. The property is evaluated each time it is invoked.
      * Because of that there is no notify signal.
      **/
     Q_PROPERTY(bool shadeable READ isShadeable)
     /**
      * Whether the Client is shaded.
      **/
     Q_PROPERTY(bool shade READ isShade WRITE setShade NOTIFY shadeChanged)
     /**
      * Whether the Client can be minimized. The property is evaluated each time it is invoked.
      * Because of that there is no notify signal.
      **/
     Q_PROPERTY(bool minimizable READ isMinimizable)
     /**
      * Whether the Client is minimized.
      **/
     Q_PROPERTY(bool minimized READ isMinimized WRITE setMinimized NOTIFY minimizedChanged)
     /**
      * The optional geometry representing the minimized Client in e.g a taskbar.
      * See _NET_WM_ICON_GEOMETRY at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      * The value is evaluated each time the getter is called.
      * Because of that no changed signal is provided.
      **/
     Q_PROPERTY(QRect iconGeometry READ iconGeometry)
     /**
      * Returns whether the window is any of special windows types (desktop, dock, splash, ...),
      * i.e. window types that usually don't have a window frame and the user does not use window
      * management (moving, raising,...) on them.
      * The value is evaluated each time the getter is called.
      * Because of that no changed signal is provided.
      **/
     Q_PROPERTY(bool specialWindow READ isSpecialWindow)
     /**
      * Whether window state _NET_WM_STATE_DEMANDS_ATTENTION is set. This state indicates that some
      * action in or with the window happened. For example, it may be set by the Window Manager if
      * the window requested activation but the Window Manager refused it, or the application may set
      * it if it finished some work. This state may be set by both the Client and the Window Manager.
      * It should be unset by the Window Manager when it decides the window got the required attention
      * (usually, that it got activated).
      **/
     Q_PROPERTY(bool demandsAttention READ isDemandingAttention WRITE demandAttention NOTIFY demandsAttentionChanged)
     /**
      * The Caption of the Client. Read from WM_NAME property together with a suffix for hostname and shortcut.
      * To read only the caption as provided by WM_NAME, use the getter with an additional @c false value.
      **/
     Q_PROPERTY(QString caption READ caption NOTIFY captionChanged)
     /**
      * Minimum size as specified in WM_NORMAL_HINTS
      **/
     Q_PROPERTY(QSize minSize READ minSize)
     /**
      * Maximum size as specified in WM_NORMAL_HINTS
      **/
     Q_PROPERTY(QSize maxSize READ maxSize)
     /**
      * Whether the Client can accept keyboard focus.
      * The value is evaluated each time the getter is called.
      * Because of that no changed signal is provided.
      **/
     Q_PROPERTY(bool wantsInput READ wantsInput)
     /**
      * Whether the Client is a transient Window to another Window.
      * @see transientFor
      **/
     Q_PROPERTY(bool transient READ isTransient NOTIFY transientChanged)
     /**
      * The Client to which this Client is a transient if any.
      **/
     Q_PROPERTY(KWin::AbstractClient *transientFor READ transientFor NOTIFY transientChanged)
     /**
      * Whether the Client represents a modal window.
      **/
     Q_PROPERTY(bool modal READ isModal NOTIFY modalChanged)
     /**
      * The geometry of this Client. Be aware that depending on resize mode the geometryChanged signal
      * might be emitted at each resize step or only at the end of the resize operation.
      **/
     Q_PROPERTY(QRect geometry READ geometry WRITE setGeometry)
     /**
      * Whether the Client is currently being moved by the user.
      * Notify signal is emitted when the Client starts or ends move/resize mode.
      **/
     Q_PROPERTY(bool move READ isMove NOTIFY moveResizedChanged)
     /**
      * Whether the Client is currently being resized by the user.
      * Notify signal is emitted when the Client starts or ends move/resize mode.
      **/
     Q_PROPERTY(bool resize READ isResize NOTIFY moveResizedChanged)
     /**
      * Whether the decoration is currently using an alpha channel.
      **/
     Q_PROPERTY(bool decorationHasAlpha READ decorationHasAlpha)
     /**
      * Whether the window has a decoration or not.
      * This property is not allowed to be set by applications themselves.
      * The decision whether a window has a border or not belongs to the window manager.
      * If this property gets abused by application developers, it will be removed again.
      **/
     Q_PROPERTY(bool noBorder READ noBorder WRITE setNoBorder)
     /**
      * Whether the Client provides context help. Mostly needed by decorations to decide whether to
      * show the help button or not.
      **/
     Q_PROPERTY(bool providesContextHelp READ providesContextHelp CONSTANT)
     /**
      * Whether the Client can be maximized both horizontally and vertically.
      * The property is evaluated each time it is invoked.
      * Because of that there is no notify signal.
      **/
     Q_PROPERTY(bool maximizable READ isMaximizable)
     /**
      * Whether the Client is moveable. Even if it is not moveable, it might be possible to move
      * it to another screen. The property is evaluated each time it is invoked.
      * Because of that there is no notify signal.
      * @see moveableAcrossScreens
      **/
     Q_PROPERTY(bool moveable READ isMovable)
     /**
      * Whether the Client can be moved to another screen. The property is evaluated each time it is invoked.
      * Because of that there is no notify signal.
      * @see moveable
      **/
     Q_PROPERTY(bool moveableAcrossScreens READ isMovableAcrossScreens)
     /**
      * Whether the Client can be resized. The property is evaluated each time it is invoked.
      * Because of that there is no notify signal.
      **/
     Q_PROPERTY(bool resizeable READ isResizable)
 
     /**
      * The desktop file name of the application this AbstractClient belongs to.
      *
      * This is either the base name without full path and without file extension of the
      * desktop file for the window's application (e.g. "org.kde.foo").
      *
      * The application's desktop file name can also be the full path to the desktop file
      * (e.g. "/opt/kde/share/org.kde.foo.desktop") in case it's not in a standard location.
      **/
     Q_PROPERTY(QByteArray desktopFileName READ desktopFileName NOTIFY desktopFileNameChanged)
 
     /**
      * Whether an application menu is available for this Client
      */
     Q_PROPERTY(bool hasApplicationMenu READ hasApplicationMenu NOTIFY hasApplicationMenuChanged)
     /**
      * Whether the application menu for this Client is currently opened
      */
     Q_PROPERTY(bool applicationMenuActive READ applicationMenuActive NOTIFY applicationMenuActiveChanged)
 
+    /**
+     * Whether this client is unresponsive.
+     *
+     * When an application failed to react on a ping request in time, it is
+     * considered unresponsive. This usually indicates that the application froze or crashed.
+     */
+    Q_PROPERTY(bool unresponsive READ unresponsive NOTIFY unresponsiveChanged)
+
 public:
     virtual ~AbstractClient();
 
     QWeakPointer<TabBox::TabBoxClientImpl> tabBoxClient() const {
         return m_tabBoxClient.toWeakRef();
     }
     bool isFirstInTabBox() const {
         return m_firstInTabBox;
     }
     bool skipSwitcher() const {
         return m_skipSwitcher;
     }
     void setSkipSwitcher(bool set);
 
     bool skipTaskbar() const {
         return m_skipTaskbar;
     }
     void setSkipTaskbar(bool set);
     void setOriginalSkipTaskbar(bool set);
     bool originalSkipTaskbar() const {
         return m_originalSkipTaskbar;
     }
 
     bool skipPager() const {
         return m_skipPager;
     }
     void setSkipPager(bool set);
 
     const QIcon &icon() const {
         return m_icon;
     }
 
     bool isActive() const {
         return m_active;
     }
     /**
      * Sets the client's active state to \a act.
      *
      * This function does only change the visual appearance of the client,
      * it does not change the focus setting. Use
      * Workspace::activateClient() or Workspace::requestFocus() instead.
      *
      * If a client receives or looses the focus, it calls setActive() on
      * its own.
      **/
     void setActive(bool);
 
     bool keepAbove() const {
         return m_keepAbove;
     }
     void setKeepAbove(bool);
     bool keepBelow() const {
         return m_keepBelow;
     }
     void setKeepBelow(bool);
 
     void demandAttention(bool set = true);
     bool isDemandingAttention() const {
         return m_demandsAttention;
     }
 
     void cancelAutoRaise();
 
     bool wantsTabFocus() const;
 
     QPoint clientPos() const override {
         return QPoint(borderLeft(), borderTop());
     }
 
     virtual void updateMouseGrab();
     virtual QString caption(bool full = true, bool stripped = false) const = 0;
     virtual bool isCloseable() const = 0;
     // TODO: remove boolean trap
     virtual bool isShown(bool shaded_is_shown) const = 0;
     virtual bool isHiddenInternal() const = 0;
     // TODO: remove boolean trap
     virtual void hideClient(bool hide) = 0;
     virtual bool isFullScreenable() const = 0;
     virtual bool isFullScreen() const = 0;
     // TODO: remove boolean trap
     virtual AbstractClient *findModal(bool allow_itself = false) = 0;
     virtual bool isTransient() const;
     /**
      * @returns Whether there is a hint available to place the AbstractClient on it's parent, default @c false.
      * @see transientPlacementHint
      **/
     virtual bool hasTransientPlacementHint() const;
     /**
      * @returns The recommended position of the transient in parent coordinates
      **/
     virtual QPoint transientPlacementHint() const;
     const AbstractClient* transientFor() const;
     AbstractClient* transientFor();
     /**
      * @returns @c true if c is the transient_for window for this client,
      *  or recursively the transient_for window
      * @todo: remove boolean trap
      **/
     virtual bool hasTransient(const AbstractClient* c, bool indirect) const;
     const QList<AbstractClient*>& transients() const; // Is not indirect
     virtual void removeTransient(AbstractClient* cl);
     virtual QList<AbstractClient*> mainClients() const; // Call once before loop , is not indirect
     QList<AbstractClient*> allMainClients() const; // Call once before loop , is indirect
     /**
      * Returns true for "special" windows and false for windows which are "normal"
      * (normal=window which has a border, can be moved by the user, can be closed, etc.)
      * true for Desktop, Dock, Splash, Override and TopMenu (and Toolbar??? - for now)
      * false for Normal, Dialog, Utility and Menu (and Toolbar??? - not yet) TODO
      */
     bool isSpecialWindow() const;
     void sendToScreen(int screen);
     virtual const QKeySequence &shortcut() const  = 0;
     virtual void setShortcut(const QString &cut) = 0;
     virtual bool performMouseCommand(Options::MouseCommand, const QPoint &globalPos);
     void setOnAllDesktops(bool set);
     void setDesktop(int);
     int desktop() const override {
         return m_desktop;
     }
     void setMinimized(bool set);
     /**
     * Minimizes this client plus its transients
     */
     void minimize(bool avoid_animation = false);
     void unminimize(bool avoid_animation = false);
     bool isMinimized() const {
         return m_minimized;
     }
     virtual void setFullScreen(bool set, bool user = true) = 0;
     virtual TabGroup *tabGroup() const;
     Q_INVOKABLE virtual bool untab(const QRect &toGeometry = QRect(), bool clientRemoved = false);
     virtual bool isCurrentTab() const;
     virtual QRect geometryRestore() const = 0;
     virtual MaximizeMode maximizeMode() const = 0;
     void maximize(MaximizeMode);
     void setMaximize(bool vertically, bool horizontally);
     virtual bool noBorder() const = 0;
     virtual void setNoBorder(bool set) = 0;
     virtual void blockActivityUpdates(bool b = true) = 0;
     QPalette palette() const;
     const Decoration::DecorationPalette *decorationPalette() const;
     virtual bool isResizable() const = 0;
     virtual bool isMovable() const = 0;
     virtual bool isMovableAcrossScreens() const = 0;
     /**
      * @c true only for @c ShadeNormal
      **/
     bool isShade() const {
         return shadeMode() == ShadeNormal;
     }
     /**
      * Default implementation returns @c ShadeNone
      **/
     virtual ShadeMode shadeMode() const; // Prefer isShade()
     void setShade(bool set);
     /**
      * Default implementation does nothing
      **/
     virtual void setShade(ShadeMode mode);
     /**
      * Whether the Client can be shaded. Default implementation returns @c false.
      **/
     virtual bool isShadeable() const;
     virtual bool isMaximizable() const = 0;
     virtual bool isMinimizable() const = 0;
     virtual QRect iconGeometry() const;
     virtual bool userCanSetFullScreen() const = 0;
     virtual bool userCanSetNoBorder() const = 0;
     virtual void setOnAllActivities(bool set) = 0;
     virtual const WindowRules* rules() const = 0;
     virtual void takeFocus() = 0;
     virtual bool wantsInput() const = 0;
     /**
      * Whether a dock window wants input.
      *
      * By default KWin doesn't pass focus to a dock window unless a force activate
      * request is provided.
      *
      * This method allows to have dock windows take focus also through flags set on
      * the window.
      *
      * The default implementation returns @c false.
      **/
     virtual bool dockWantsInput() const;
     void checkWorkspacePosition(QRect oldGeometry = QRect(), int oldDesktop = -2,  QRect oldClientGeometry = QRect());
     virtual xcb_timestamp_t userTime() const;
     virtual void updateWindowRules(Rules::Types selection) = 0;
 
     void growHorizontal();
     void shrinkHorizontal();
     void growVertical();
     void shrinkVertical();
     void updateMoveResize(const QPointF &currentGlobalCursor);
     /**
      * Ends move resize when all pointer buttons are up again.
      **/
     void endMoveResize();
     void keyPressEvent(uint key_code);
 
     void enterEvent(const QPoint &globalPos);
     void leaveEvent();
 
     /**
      * These values represent positions inside an area
      */
     enum Position {
         // without prefix, they'd conflict with Qt::TopLeftCorner etc. :(
         PositionCenter         = 0x00,
         PositionLeft           = 0x01,
         PositionRight          = 0x02,
         PositionTop            = 0x04,
         PositionBottom         = 0x08,
         PositionTopLeft        = PositionLeft | PositionTop,
         PositionTopRight       = PositionRight | PositionTop,
         PositionBottomLeft     = PositionLeft | PositionBottom,
         PositionBottomRight    = PositionRight | PositionBottom
     };
     Position titlebarPosition() const;
     bool titlebarPositionUnderMouse() const;
 
     // a helper for the workspace window packing. tests for screen validity and updates since in maximization case as with normal moving
     void packTo(int left, int top);
 
     enum QuickTileFlag {
         QuickTileNone = 0,
         QuickTileLeft = 1,
         QuickTileRight = 1<<1,
         QuickTileTop = 1<<2,
         QuickTileBottom = 1<<3,
         QuickTileHorizontal = QuickTileLeft|QuickTileRight,
         QuickTileVertical = QuickTileTop|QuickTileBottom,
         QuickTileMaximize = QuickTileLeft|QuickTileRight|QuickTileTop|QuickTileBottom
     };
     Q_DECLARE_FLAGS(QuickTileMode, QuickTileFlag)
     /** Set the quick tile mode ("snap") of this window.
      * This will also handle preserving and restoring of window geometry as necessary.
      * @param mode The tile mode (left/right) to give this window.
      */
     void setQuickTileMode(QuickTileMode mode, bool keyboard = false);
     QuickTileMode quickTileMode() const {
         return QuickTileMode(m_quickTileMode);
     }
     Layer layer() const override;
     void updateLayer();
 
     enum ForceGeometry_t { NormalGeometrySet, ForceGeometrySet };
     void move(int x, int y, ForceGeometry_t force = NormalGeometrySet);
     void move(const QPoint &p, ForceGeometry_t force = NormalGeometrySet);
     virtual void resizeWithChecks(int w, int h, ForceGeometry_t force = NormalGeometrySet) = 0;
     void resizeWithChecks(const QSize& s, ForceGeometry_t force = NormalGeometrySet);
     void keepInArea(QRect area, bool partial = false);
     virtual QSize minSize() const;
     virtual QSize maxSize() const;
     virtual void setGeometry(int x, int y, int w, int h, ForceGeometry_t force = NormalGeometrySet) = 0;
     void setGeometry(const QRect& r, ForceGeometry_t force = NormalGeometrySet);
     /// How to resize the window in order to obey constains (mainly aspect ratios)
     enum Sizemode {
         SizemodeAny,
         SizemodeFixedW, ///< Try not to affect width
         SizemodeFixedH, ///< Try not to affect height
         SizemodeMax ///< Try not to make it larger in either direction
     };
     /**
      *Calculate the appropriate frame size for the given client size @p wsize.
      *
      * @p wsize is adapted according to the window's size hints (minimum, maximum and incremental size changes).
      *
      * Default implementation returns the passed in @p wsize.
      */
     virtual QSize sizeForClientSize(const QSize &wsize, Sizemode mode = SizemodeAny, bool noframe = false) const;
 
     QSize adjustedSize(const QSize&, Sizemode mode = SizemodeAny) const;
     QSize adjustedSize() const;
 
     bool isMove() const {
         return isMoveResize() && moveResizePointerMode() == PositionCenter;
     }
     bool isResize() const {
         return isMoveResize() && moveResizePointerMode() != PositionCenter;
     }
     /**
      * Cursor shape for move/resize mode.
      **/
     Qt::CursorShape cursor() const {
         return m_moveResize.cursor;
     }
 
     virtual bool hasStrut() const;
 
     void setModal(bool modal);
     bool isModal() const;
 
     /**
      * Determines the mouse command for the given @p button in the current state.
      *
      * The @p handled argument specifies whether the button was handled or not.
      * This value should be used to determine whether the mouse button should be
      * passed to the AbstractClient or being filtered out.
      **/
     Options::MouseCommand getMouseCommand(Qt::MouseButton button, bool *handled) const;
     Options::MouseCommand getWheelCommand(Qt::Orientation orientation, bool *handled) const;
 
     // decoration related
     KDecoration2::Decoration *decoration() {
         return m_decoration.decoration;
     }
     const KDecoration2::Decoration *decoration() const {
         return m_decoration.decoration;
     }
     bool isDecorated() const {
         return m_decoration.decoration != nullptr;
     }
     QPointer<Decoration::DecoratedClientImpl> decoratedClient() const;
     void setDecoratedClient(QPointer<Decoration::DecoratedClientImpl> client);
     bool decorationHasAlpha() const;
     void triggerDecorationRepaint();
     virtual void layoutDecorationRects(QRect &left, QRect &top, QRect &right, QRect &bottom) const;
     void processDecorationMove(const QPoint &localPos, const QPoint &globalPos);
     bool processDecorationButtonPress(QMouseEvent *event, bool ignoreMenu = false);
     void processDecorationButtonRelease(QMouseEvent *event);
 
     /**
      * TODO: fix boolean traps
      **/
     virtual void updateDecoration(bool check_workspace_pos, bool force = false) = 0;
 
     /**
     * Returns whether the window provides context help or not. If it does,
     * you should show a help menu item or a help button like '?' and call
     * contextHelp() if this is invoked.
     *
     * Default implementation returns @c false.
     * @see showContextHelp;
     */
     virtual bool providesContextHelp() const;
 
     /**
     * Invokes context help on the window. Only works if the window
     * actually provides context help.
     *
     * Default implementation does nothing.
     *
     * @see providesContextHelp()
     */
     virtual void showContextHelp();
 
     QRect inputGeometry() const override;
 
     /**
      * Restores the AbstractClient after it had been hidden due to show on screen edge functionality.
      * The AbstractClient also gets raised (e.g. Panel mode windows can cover) and the AbstractClient
      * gets informed in a window specific way that it is shown and raised again.
      **/
     virtual void showOnScreenEdge() = 0;
 
     QByteArray desktopFileName() const {
         return m_desktopFileName;
     }
 
     /**
      * Tries to terminate the process of this AbstractClient.
      *
      * Implementing subclasses can perform a windowing system solution for terminating.
      **/
     virtual void killWindow() = 0;
 
     // TODO: remove boolean trap
     static bool belongToSameApplication(const AbstractClient* c1, const AbstractClient* c2, bool active_hack = false);
 
     bool hasApplicationMenu() const;
     bool applicationMenuActive() const {
         return m_applicationMenuActive;
     }
     void setApplicationMenuActive(bool applicationMenuActive);
 
     QString applicationMenuServiceName() const {
         return m_applicationMenuServiceName;
     }
     QString applicationMenuObjectPath() const {
         return m_applicationMenuObjectPath;
     }
 
     /**
      * Request showing the application menu bar
      * @param actionId The DBus menu ID of the action that should be highlighted, 0 for the root menu
      */
     void showApplicationMenu(int actionId);
 
+    bool unresponsive() const;
+
 public Q_SLOTS:
     virtual void closeWindow() = 0;
 
 Q_SIGNALS:
     void fullScreenChanged();
     void skipTaskbarChanged();
     void skipPagerChanged();
     void skipSwitcherChanged();
     void iconChanged();
     void activeChanged();
     void keepAboveChanged(bool);
     void keepBelowChanged(bool);
     /**
      * Emitted whenever the demands attention state changes.
      **/
     void demandsAttentionChanged();
     void desktopPresenceChanged(KWin::AbstractClient*, int); // to be forwarded by Workspace
     void desktopChanged();
     void shadeChanged();
     void minimizedChanged();
     void clientMinimized(KWin::AbstractClient* client, bool animate);
     void clientUnminimized(KWin::AbstractClient* client, bool animate);
     void paletteChanged(const QPalette &p);
     void captionChanged();
     void clientMaximizedStateChanged(KWin::AbstractClient*, MaximizeMode);
     void clientMaximizedStateChanged(KWin::AbstractClient* c, bool h, bool v);
     void transientChanged();
     void modalChanged();
     void quickTileModeChanged();
     void moveResizedChanged();
     void moveResizeCursorChanged(Qt::CursorShape);
     void clientStartUserMovedResized(KWin::AbstractClient*);
     void clientStepUserMovedResized(KWin::AbstractClient *, const QRect&);
     void clientFinishUserMovedResized(KWin::AbstractClient*);
     void closeableChanged(bool);
     void minimizeableChanged(bool);
     void shadeableChanged(bool);
     void maximizeableChanged(bool);
     void desktopFileNameChanged();
     void hasApplicationMenuChanged(bool);
     void applicationMenuActiveChanged(bool);
+    void unresponsiveChanged(bool);
 
 protected:
     AbstractClient();
     void setFirstInTabBox(bool enable) {
         m_firstInTabBox = enable;
     }
     void setIcon(const QIcon &icon);
     void startAutoRaise();
     void autoRaise();
     /**
      * Whether the window accepts focus.
      * The difference to wantsInput is that the implementation should not check rules and return
      * what the window effectively supports.
      **/
     virtual bool acceptsFocus() const = 0;
     /**
      * Called from ::setActive once the active value got updated, but before the changed signal
      * is emitted.
      *
      * Default implementation does nothing.
      **/
     virtual void doSetActive();
     /**
      * Called from ::setKeepAbove once the keepBelow value got updated, but before the changed signal
      * is emitted.
      *
      * Default implementation does nothing.
      **/
     virtual void doSetKeepAbove();
     /**
      * Called from ::setKeepBelow once the keepBelow value got updated, but before the changed signal
      * is emitted.
      *
      * Default implementation does nothing.
      **/
     virtual void doSetKeepBelow();
     /**
      * Called from ::setDeskop once the desktop value got updated, but before the changed signal
      * is emitted.
      *
      * Default implementation does nothing.
      * @param desktop The new desktop the Client is on
      * @param was_desk The desktop the Client was on before
      **/
     virtual void doSetDesktop(int desktop, int was_desk);
     /**
      * Called from ::minimize and ::unminimize once the minimized value got updated, but before the
      * changed signal is emitted.
      *
      * Default implementation does nothig.
      **/
     virtual void doMinimize();
     // TODO: remove boolean trap
     virtual bool belongsToSameApplication(const AbstractClient *other, bool active_hack) const = 0;
 
     virtual void doSetSkipTaskbar();
     virtual void doSetSkipPager();
 
     void setupWindowManagementInterface();
     void destroyWindowManagementInterface();
 
     void updateColorScheme(QString path);
 
     void setTransientFor(AbstractClient *transientFor);
     virtual void addTransient(AbstractClient* cl);
     /**
      * Just removes the @p cl from the transients without any further checks.
      **/
     void removeTransientFromList(AbstractClient* cl);
 
     Layer belongsToLayer() const;
     virtual bool belongsToDesktop() const;
     void invalidateLayer();
     virtual bool isActiveFullScreen() const;
     virtual Layer layerForDock() const;
 
     // electric border / quick tiling
     void setElectricBorderMode(QuickTileMode mode);
     QuickTileMode electricBorderMode() const {
         return m_electricMode;
     }
     void setElectricBorderMaximizing(bool maximizing);
     bool isElectricBorderMaximizing() const {
         return m_electricMaximizing;
     }
     QRect electricBorderMaximizeGeometry(QPoint pos, int desktop);
     void updateQuickTileMode(QuickTileMode newMode) {
         m_quickTileMode = newMode;
     }
 
     KWayland::Server::PlasmaWindowInterface *windowManagementInterface() const {
         return m_windowManagementInterface;
     }
 
     // geometry handling
     void checkOffscreenPosition(QRect *geom, const QRect &screenArea);
     int borderLeft() const;
     int borderRight() const;
     int borderTop() const;
     int borderBottom() const;
     virtual void changeMaximize(bool horizontal, bool vertical, bool adjust) = 0;
     virtual void setGeometryRestore(const QRect &geo) = 0;
     /**
      * Called from move after updating the geometry. Can be reimplemented to perform specific tasks.
      * The base implementation does nothing.
      **/
     virtual void doMove(int x, int y);
     void blockGeometryUpdates(bool block);
     void blockGeometryUpdates();
     void unblockGeometryUpdates();
     bool areGeometryUpdatesBlocked() const;
     enum PendingGeometry_t {
         PendingGeometryNone,
         PendingGeometryNormal,
         PendingGeometryForced
     };
     PendingGeometry_t pendingGeometryUpdate() const;
     void setPendingGeometryUpdate(PendingGeometry_t update);
     QRect geometryBeforeUpdateBlocking() const {
         return m_geometryBeforeUpdateBlocking;
     }
     void updateGeometryBeforeUpdateBlocking();
     /**
      * Schedules a repaint for the visibleRect before and after a
      * geometry update. The current visibleRect is stored for the
      * next time this method is called as the before geometry.
      **/
     void addRepaintDuringGeometryUpdates();
 
     /**
      * Convenient method to update the TabGroup states if there is one present.
      * Marked as virtual as TabGroup does not yet handle AbstractClient, but only
      * subclasses of AbstractClient. Given that the default implementation does nothing.
      **/
     virtual void updateTabGroupStates(TabGroup::States states);
 
     /**
      * @returns whether the Client is currently in move resize mode
      **/
     bool isMoveResize() const {
         return m_moveResize.enabled;
     }
     /**
      * Sets whether the Client is in move resize mode to @p enabled.
      **/
     void setMoveResize(bool enabled) {
         m_moveResize.enabled = enabled;
     }
     /**
      * @returns whether the move resize mode is unrestricted.
      **/
     bool isUnrestrictedMoveResize() const {
         return m_moveResize.unrestricted;
     }
     /**
      * Sets whether move resize mode is unrestricted to @p set.
      **/
     void setUnrestrictedMoveResize(bool set) {
         m_moveResize.unrestricted = set;
     }
     QPoint moveOffset() const {
         return m_moveResize.offset;
     }
     void setMoveOffset(const QPoint &offset) {
         m_moveResize.offset = offset;
     }
     QPoint invertedMoveOffset() const {
         return m_moveResize.invertedOffset;
     }
     void setInvertedMoveOffset(const QPoint &offset) {
         m_moveResize.invertedOffset = offset;
     }
     QRect initialMoveResizeGeometry() const {
         return m_moveResize.initialGeometry;
     }
     /**
      * Sets the initial move resize geometry to the current geometry.
      **/
     void updateInitialMoveResizeGeometry();
     QRect moveResizeGeometry() const {
         return m_moveResize.geometry;
     }
     void setMoveResizeGeometry(const QRect &geo) {
         m_moveResize.geometry = geo;
     }
     Position moveResizePointerMode() const {
         return m_moveResize.pointer;
     }
     void setMoveResizePointerMode(Position mode) {
         m_moveResize.pointer = mode;
     }
     bool isMoveResizePointerButtonDown() const {
         return m_moveResize.buttonDown;
     }
     void setMoveResizePointerButtonDown(bool down) {
         m_moveResize.buttonDown = down;
     }
     int moveResizeStartScreen() const {
         return m_moveResize.startScreen;
     }
     void checkUnrestrictedMoveResize();
     /**
     * Sets an appropriate cursor shape for the logical mouse position.
     */
     void updateCursor();
     void startDelayedMoveResize();
     void stopDelayedMoveResize();
     bool startMoveResize();
     /**
      * Called from @link startMoveResize.
      *
      * Implementing classes should return @c false if starting move resize should
      * get aborted. In that case @link startMoveResize will also return @c false.
      *
      * Base implementation returns @c true.
      **/
     virtual bool doStartMoveResize();
     void finishMoveResize(bool cancel);
     /**
      * Leaves the move resize mode.
      *
      * Inheriting classes must invoke the base implementation which
      * ensures that the internal mode is properly ended.
      **/
     virtual void leaveMoveResize();
     virtual void positionGeometryTip();
     void performMoveResize();
     /**
      * Called from performMoveResize() after actually performing the change of geometry.
      * Implementing subclasses can perform windowing system specific handling here.
      *
      * Default implementation does nothing.
      **/
     virtual void doPerformMoveResize();
     /*
      * Checks if the mouse cursor is near the edge of the screen and if so
      * activates quick tiling or maximization
      */
     void checkQuickTilingMaximizationZones(int xroot, int yroot);
     /**
      * Whether a sync request is still pending.
      * Default implementation returns @c false.
      **/
     virtual bool isWaitingForMoveResizeSync() const;
     /**
      * Called during handling a resize. Implementing subclasses can use this
      * method to perform windowing system specific syncing.
      *
      * Default implementation does nothing.
      **/
     virtual void doResizeSync();
     void handleMoveResize(int x, int y, int x_root, int y_root);
     void handleMoveResize(const QPoint &local, const QPoint &global);
     void dontMoveResize();
 
     virtual QSize resizeIncrements() const;
 
     /**
      * Returns the position depending on the Decoration's section under mouse.
      * If no decoration it returns PositionCenter.
      **/
     Position mousePosition() const;
 
     static bool haveResizeEffect() {
         return s_haveResizeEffect;
     }
     static void updateHaveResizeEffect();
     static void resetHaveResizeEffect() {
         s_haveResizeEffect = false;
     }
 
     void setDecoration(KDecoration2::Decoration *decoration) {
         m_decoration.decoration = decoration;
     }
     virtual void destroyDecoration();
     void startDecorationDoubleClickTimer();
     void invalidateDecorationDoubleClickTimer();
 
     void setDesktopFileName(const QByteArray &name);
     QString iconFromDesktopFile() const;
 
     void updateApplicationMenuServiceName(const QString &serviceName);
     void updateApplicationMenuObjectPath(const QString &objectPath);
 
+    void setUnresponsive(bool unresponsive);
+
 private:
     void handlePaletteChange();
     QSharedPointer<TabBox::TabBoxClientImpl> m_tabBoxClient;
     bool m_firstInTabBox = false;
     bool m_skipTaskbar = false;
     /**
      * Unaffected by KWin
      **/
     bool m_originalSkipTaskbar = false;
     bool m_skipPager = false;
     bool m_skipSwitcher = false;
     QIcon m_icon;
     bool m_active = false;
     bool m_keepAbove = false;
     bool m_keepBelow = false;
     bool m_demandsAttention = false;
     bool m_minimized = false;
     QTimer *m_autoRaiseTimer = nullptr;
     int m_desktop = 0; // 0 means not on any desktop yet
 
     QString m_colorScheme;
     std::shared_ptr<Decoration::DecorationPalette> m_palette;
     static QHash<QString, std::weak_ptr<Decoration::DecorationPalette>> s_palettes;
     static std::shared_ptr<Decoration::DecorationPalette> s_defaultPalette;
 
     KWayland::Server::PlasmaWindowInterface *m_windowManagementInterface = nullptr;
 
     AbstractClient *m_transientFor = nullptr;
     QList<AbstractClient*> m_transients;
     bool m_modal = false;
     Layer m_layer = UnknownLayer;
 
     // electric border/quick tiling
     QuickTileMode m_electricMode = QuickTileNone;
     bool m_electricMaximizing = false;
     /** The quick tile mode of this window.
      */
     int m_quickTileMode = QuickTileNone;
     QTimer *m_electricMaximizingDelay = nullptr;
 
     // geometry
     int m_blockGeometryUpdates = 0; // > 0 = New geometry is remembered, but not actually set
     PendingGeometry_t m_pendingGeometryUpdate = PendingGeometryNone;
     friend class GeometryUpdatesBlocker;
     QRect m_visibleRectBeforeGeometryUpdate;
     QRect m_geometryBeforeUpdateBlocking;
 
     struct {
         bool enabled = false;
         bool unrestricted = false;
         QPoint offset;
         QPoint invertedOffset;
         QRect initialGeometry;
         QRect geometry;
         Position pointer = PositionCenter;
         bool buttonDown = false;
         Qt::CursorShape cursor = Qt::ArrowCursor;
         int startScreen = 0;
         QTimer *delayedTimer = nullptr;
     } m_moveResize;
 
     struct {
         KDecoration2::Decoration *decoration = nullptr;
         QPointer<Decoration::DecoratedClientImpl> client;
         QElapsedTimer doubleClickTimer;
     } m_decoration;
     QByteArray m_desktopFileName;
 
     bool m_applicationMenuActive = false;
     QString m_applicationMenuServiceName;
     QString m_applicationMenuObjectPath;
 
+    bool m_unresponsive = false;
+
     static bool s_haveResizeEffect;
 };
 
 /**
  * Helper for AbstractClient::blockGeometryUpdates() being called in pairs (true/false)
  */
 class GeometryUpdatesBlocker
 {
 public:
     explicit GeometryUpdatesBlocker(AbstractClient* c)
         : cl(c) {
         cl->blockGeometryUpdates(true);
     }
     ~GeometryUpdatesBlocker() {
         cl->blockGeometryUpdates(false);
     }
 
 private:
     AbstractClient* cl;
 };
 
 inline void AbstractClient::move(const QPoint& p, ForceGeometry_t force)
 {
     move(p.x(), p.y(), force);
 }
 
 inline void AbstractClient::resizeWithChecks(const QSize& s, AbstractClient::ForceGeometry_t force)
 {
     resizeWithChecks(s.width(), s.height(), force);
 }
 
 inline void AbstractClient::setGeometry(const QRect& r, ForceGeometry_t force)
 {
     setGeometry(r.x(), r.y(), r.width(), r.height(), force);
 }
 
 inline const QList<AbstractClient*>& AbstractClient::transients() const
 {
     return m_transients;
 }
 
 inline bool AbstractClient::areGeometryUpdatesBlocked() const
 {
     return m_blockGeometryUpdates != 0;
 }
 
 inline void AbstractClient::blockGeometryUpdates()
 {
     m_blockGeometryUpdates++;
 }
 
 inline void AbstractClient::unblockGeometryUpdates()
 {
     m_blockGeometryUpdates--;
 }
 
 inline AbstractClient::PendingGeometry_t AbstractClient::pendingGeometryUpdate() const
 {
     return m_pendingGeometryUpdate;
 }
 
 inline void AbstractClient::setPendingGeometryUpdate(PendingGeometry_t update)
 {
     m_pendingGeometryUpdate = update;
 }
 
 }
 
 Q_DECLARE_METATYPE(KWin::AbstractClient*)
 Q_DECLARE_METATYPE(QList<KWin::AbstractClient*>)
 Q_DECLARE_OPERATORS_FOR_FLAGS(KWin::AbstractClient::QuickTileMode)
 
 #endif
diff --git a/autotests/test_scripted_effectloader.cpp b/autotests/test_scripted_effectloader.cpp
index 6a5962864..39f215d07 100644
--- a/autotests/test_scripted_effectloader.cpp
+++ b/autotests/test_scripted_effectloader.cpp
@@ -1,437 +1,441 @@
 /********************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.
 
 Copyright (C) 2014 Martin Gräßlin <mgraesslin@kde.org>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 #include "../effectloader.h"
 #include "mock_effectshandler.h"
 #include "../scripting/scriptedeffect.h"
 // for mocking
 #include "../input.h"
 #include "../screenedge.h"
 // KDE
 #include <KConfig>
 #include <KConfigGroup>
 #include <KPackage/PackageLoader>
 // Qt
 #include <QtTest/QtTest>
 #include <QStringList>
 Q_DECLARE_METATYPE(KWin::LoadEffectFlag)
 Q_DECLARE_METATYPE(KWin::LoadEffectFlags)
 Q_DECLARE_METATYPE(KWin::Effect*)
 Q_DECLARE_METATYPE(KSharedConfigPtr)
 
 Q_LOGGING_CATEGORY(KWIN_CORE, "kwin_core")
 
 
 namespace KWin
 {
 ScreenEdges *ScreenEdges::s_self = nullptr;
 
 void ScreenEdges::reserve(ElectricBorder, QObject *, const char *)
 {
 }
 
 InputRedirection *InputRedirection::s_self = nullptr;
 
 void InputRedirection::registerShortcut(const QKeySequence &, QAction *)
 {
 }
 
 namespace MetaScripting
 {
 void registration(QScriptEngine *)
 {
 }
 }
 
 }
 
 class TestScriptedEffectLoader : public QObject
 {
     Q_OBJECT
 private Q_SLOTS:
     void initTestCase();
     void testHasEffect_data();
     void testHasEffect();
     void testKnownEffects();
     void testLoadEffect_data();
     void testLoadEffect();
     void testLoadScriptedEffect_data();
     void testLoadScriptedEffect();
     void testLoadAllEffects();
     void testCancelLoadAllEffects();
 };
 
 void TestScriptedEffectLoader::initTestCase()
 {
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
     QCoreApplication::instance()->setProperty("config", QVariant::fromValue(config));
 }
 
 void TestScriptedEffectLoader::testHasEffect_data()
 {
     QTest::addColumn<QString>("name");
     QTest::addColumn<bool>("expected");
 
     // all the built-in effects should fail
     QTest::newRow("blur")                        << QStringLiteral("blur")                      << false;
     QTest::newRow("Colorpicker")                 << QStringLiteral("colorpicker")               << false;
     QTest::newRow("Contrast")                    << QStringLiteral("contrast")                  << false;
     QTest::newRow("CoverSwitch")                 << QStringLiteral("coverswitch")               << false;
     QTest::newRow("Cube")                        << QStringLiteral("cube")                      << false;
     QTest::newRow("CubeSlide")                   << QStringLiteral("cubeslide")                 << false;
     QTest::newRow("DesktopGrid")                 << QStringLiteral("desktopgrid")               << false;
     QTest::newRow("DimInactive")                 << QStringLiteral("diminactive")               << false;
     QTest::newRow("DimScreen")                   << QStringLiteral("dimscreen")                 << false;
     QTest::newRow("FallApart")                   << QStringLiteral("fallapart")                 << false;
     QTest::newRow("FlipSwitch")                  << QStringLiteral("flipswitch")                << false;
     QTest::newRow("Glide")                       << QStringLiteral("glide")                     << false;
     QTest::newRow("HighlightWindow")             << QStringLiteral("highlightwindow")           << false;
     QTest::newRow("Invert")                      << QStringLiteral("invert")                    << false;
     QTest::newRow("Kscreen")                     << QStringLiteral("kscreen")                   << false;
     QTest::newRow("Logout")                      << QStringLiteral("logout")                    << false;
     QTest::newRow("LookingGlass")                << QStringLiteral("lookingglass")              << false;
     QTest::newRow("MagicLamp")                   << QStringLiteral("magiclamp")                 << false;
     QTest::newRow("Magnifier")                   << QStringLiteral("magnifier")                 << false;
     QTest::newRow("MinimizeAnimation")           << QStringLiteral("minimizeanimation")         << false;
     QTest::newRow("MouseClick")                  << QStringLiteral("mouseclick")                << false;
     QTest::newRow("MouseMark")                   << QStringLiteral("mousemark")                 << false;
     QTest::newRow("PresentWindows")              << QStringLiteral("presentwindows")            << false;
     QTest::newRow("Resize")                      << QStringLiteral("resize")                    << false;
     QTest::newRow("ScreenEdge")                  << QStringLiteral("screenedge")                << false;
     QTest::newRow("ScreenShot")                  << QStringLiteral("screenshot")                << false;
     QTest::newRow("Sheet")                       << QStringLiteral("sheet")                     << false;
     QTest::newRow("ShowFps")                     << QStringLiteral("showfps")                   << false;
     QTest::newRow("ShowPaint")                   << QStringLiteral("showpaint")                 << false;
     QTest::newRow("Slide")                       << QStringLiteral("slide")                     << false;
     QTest::newRow("SlideBack")                   << QStringLiteral("slideback")                 << false;
     QTest::newRow("SlidingPopups")               << QStringLiteral("slidingpopups")             << false;
     QTest::newRow("SnapHelper")                  << QStringLiteral("snaphelper")                << false;
     QTest::newRow("StartupFeedback")             << QStringLiteral("startupfeedback")           << false;
     QTest::newRow("ThumbnailAside")              << QStringLiteral("thumbnailaside")            << false;
     QTest::newRow("TrackMouse")                  << QStringLiteral("trackmouse")                << false;
     QTest::newRow("WindowGeometry")              << QStringLiteral("windowgeometry")            << false;
     QTest::newRow("WobblyWindows")               << QStringLiteral("wobblywindows")             << false;
     QTest::newRow("Zoom")                        << QStringLiteral("zoom")                      << false;
     QTest::newRow("Non Existing")                << QStringLiteral("InvalidName")               << false;
     QTest::newRow("Fade - without kwin4_effect") << QStringLiteral("fade")                      << false;
     QTest::newRow("Fade + kwin4_effect")         << QStringLiteral("kwin4_effect_fade")         << true;
     QTest::newRow("Fade + kwin4_effect + CS")    << QStringLiteral("kwin4_eFfect_fAde")         << true;
     QTest::newRow("FadeDesktop")                 << QStringLiteral("kwin4_effect_fadedesktop")  << true;
+    QTest::newRow("FrozenApp")                   << QStringLiteral("kwin4_effect_frozenapp")    << true;
     QTest::newRow("DialogParent")                << QStringLiteral("kwin4_effect_dialogparent") << true;
     QTest::newRow("Login")                       << QStringLiteral("kwin4_effect_login")        << true;
     QTest::newRow("Logout")                      << QStringLiteral("kwin4_effect_logout")       << true;
     QTest::newRow("Maximize")                    << QStringLiteral("kwin4_effect_maximize")     << true;
     QTest::newRow("ScaleIn")                     << QStringLiteral("kwin4_effect_scalein")      << true;
     QTest::newRow("Translucency")                << QStringLiteral("kwin4_effect_translucency") << true;
 }
 
 void TestScriptedEffectLoader::testHasEffect()
 {
     QFETCH(QString, name);
     QFETCH(bool, expected);
 
     MockEffectsHandler mockHandler(KWin::XRenderCompositing);
     KWin::ScriptedEffectLoader loader;
     QCOMPARE(loader.hasEffect(name), expected);
 
     // each available effect should also be supported
     QCOMPARE(loader.isEffectSupported(name), expected);
 
     if (expected) {
         mockHandler.setAnimationsSupported(false);
         QVERIFY(!loader.isEffectSupported(name));
     }
 }
 
 void TestScriptedEffectLoader::testKnownEffects()
 {
     QStringList expectedEffects;
     expectedEffects << QStringLiteral("kwin4_effect_dialogparent")
                     << QStringLiteral("kwin4_effect_fade")
                     << QStringLiteral("kwin4_effect_fadedesktop")
+                    << QStringLiteral("kwin4_effect_frozenapp")
                     << QStringLiteral("kwin4_effect_login")
                     << QStringLiteral("kwin4_effect_logout")
                     << QStringLiteral("kwin4_effect_maximize")
                     << QStringLiteral("kwin4_effect_scalein")
                     << QStringLiteral("kwin4_effect_translucency");
 
     KWin::ScriptedEffectLoader loader;
     QStringList result = loader.listOfKnownEffects();
     // at least as many effects as we expect - system running the test could have more effects
     QVERIFY(result.size() >= expectedEffects.size());
     for (const QString &effect : expectedEffects) {
         QVERIFY(result.contains(effect));
     }
 }
 
 void TestScriptedEffectLoader::testLoadEffect_data()
 {
     QTest::addColumn<QString>("name");
     QTest::addColumn<bool>("expected");
 
     QTest::newRow("Non Existing")                << QStringLiteral("InvalidName")               << false;
     QTest::newRow("Fade - without kwin4_effect") << QStringLiteral("fade")                      << false;
     QTest::newRow("Fade + kwin4_effect")         << QStringLiteral("kwin4_effect_fade")         << true;
     QTest::newRow("Fade + kwin4_effect + CS")    << QStringLiteral("kwin4_eFfect_fAde")         << true;
     QTest::newRow("FadeDesktop")                 << QStringLiteral("kwin4_effect_fadedesktop")  << true;
+    QTest::newRow("FrozenApp")                   << QStringLiteral("kwin4_effect_frozenapp")    << true;
     QTest::newRow("DialogParent")                << QStringLiteral("kwin4_effect_dialogparent") << true;
     QTest::newRow("Login")                       << QStringLiteral("kwin4_effect_login")        << true;
     QTest::newRow("Logout")                      << QStringLiteral("kwin4_effect_logout")        << true;
     QTest::newRow("Maximize")                    << QStringLiteral("kwin4_effect_maximize")     << true;
     QTest::newRow("ScaleIn")                     << QStringLiteral("kwin4_effect_scalein")      << true;
     QTest::newRow("Translucency")                << QStringLiteral("kwin4_effect_translucency") << true;
 }
 
 void TestScriptedEffectLoader::testLoadEffect()
 {
     QFETCH(QString, name);
     QFETCH(bool, expected);
 
     MockEffectsHandler mockHandler(KWin::XRenderCompositing);
     KWin::ScriptedEffectLoader loader;
     KSharedConfig::Ptr config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
     loader.setConfig(config);
 
     qRegisterMetaType<KWin::Effect*>();
     QSignalSpy spy(&loader, SIGNAL(effectLoaded(KWin::Effect*,QString)));
     // connect to signal to ensure that we delete the Effect again as the Effect doesn't have a parent
     connect(&loader, &KWin::ScriptedEffectLoader::effectLoaded,
         [&name](KWin::Effect *effect, const QString &effectName) {
             QCOMPARE(effectName, name.toLower());
             effect->deleteLater();
         }
     );
     // try to load the Effect
     QCOMPARE(loader.loadEffect(name), expected);
     // loading again should fail
     QVERIFY(!loader.loadEffect(name));
 
     // signal spy should have got the signal if it was expected
     QCOMPARE(spy.isEmpty(), !expected);
     if (!spy.isEmpty()) {
         QCOMPARE(spy.count(), 1);
         // if we caught a signal it should have the effect name we passed in
         QList<QVariant> arguments = spy.takeFirst();
         QCOMPARE(arguments.count(), 2);
         QCOMPARE(arguments.at(1).toString(), name.toLower());
     }
     spy.clear();
     QVERIFY(spy.isEmpty());
 
     // now if we wait for the events being processed, the effect will get deleted and it should load again
     QTest::qWait(1);
     QCOMPARE(loader.loadEffect(name), expected);
     // signal spy should have got the signal if it was expected
     QCOMPARE(spy.isEmpty(), !expected);
     if (!spy.isEmpty()) {
         QCOMPARE(spy.count(), 1);
         // if we caught a signal it should have the effect name we passed in
         QList<QVariant> arguments = spy.takeFirst();
         QCOMPARE(arguments.count(), 2);
         QCOMPARE(arguments.at(1).toString(), name.toLower());
     }
 }
 
 void TestScriptedEffectLoader::testLoadScriptedEffect_data()
 {
     QTest::addColumn<QString>("name");
     QTest::addColumn<bool>("expected");
     QTest::addColumn<KWin::LoadEffectFlags>("loadFlags");
 
     const KWin::LoadEffectFlags checkDefault = KWin::LoadEffectFlag::Load | KWin::LoadEffectFlag::CheckDefaultFunction;
     const KWin::LoadEffectFlags forceFlags = KWin::LoadEffectFlag::Load;
     const KWin::LoadEffectFlags dontLoadFlags = KWin::LoadEffectFlags();
 
     // enabled by default
     QTest::newRow("Fade")             << QStringLiteral("kwin4_effect_fade")    << true  << checkDefault;
     // not enabled by default
     QTest::newRow("Scalein")          << QStringLiteral("kwin4_effect_scalein") << true  << checkDefault;
     // Force an Effect which will load
     QTest::newRow("Scalein-Force")    << QStringLiteral("kwin4_effect_scalein") << true  << forceFlags;
     // Enforce no load of effect which is enabled by default
     QTest::newRow("Fade-DontLoad")    << QStringLiteral("kwin4_effect_fade")    << false << dontLoadFlags;
     // Enforce no load of effect which is not enabled by default, but enforced
     QTest::newRow("Scalein-DontLoad") << QStringLiteral("kwin4_effect_scalein") << false << dontLoadFlags;
 }
 
 void TestScriptedEffectLoader::testLoadScriptedEffect()
 {
     QFETCH(QString, name);
     QFETCH(bool, expected);
     QFETCH(KWin::LoadEffectFlags, loadFlags);
 
     MockEffectsHandler mockHandler(KWin::XRenderCompositing);
     KWin::ScriptedEffectLoader loader;
     KSharedConfig::Ptr config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
     loader.setConfig(config);
 
     const auto services = KPackage::PackageLoader::self()->findPackages(QStringLiteral("KWin/Effect"), QStringLiteral("kwin/effects"),
         [name] (const KPluginMetaData &metadata) {
             return metadata.pluginId().compare(name, Qt::CaseInsensitive) == 0;
         }
     );
     QCOMPARE(services.count(), 1);
 
     qRegisterMetaType<KWin::Effect*>();
     QSignalSpy spy(&loader, SIGNAL(effectLoaded(KWin::Effect*,QString)));
     // connect to signal to ensure that we delete the Effect again as the Effect doesn't have a parent
     connect(&loader, &KWin::ScriptedEffectLoader::effectLoaded,
         [&name](KWin::Effect *effect, const QString &effectName) {
             QCOMPARE(effectName, name.toLower());
             effect->deleteLater();
         }
     );
     // try to load the Effect
     QCOMPARE(loader.loadEffect(services.first(), loadFlags), expected);
     // loading again should fail
     QVERIFY(!loader.loadEffect(services.first(), loadFlags));
 
     // signal spy should have got the signal if it was expected
     QCOMPARE(spy.isEmpty(), !expected);
     if (!spy.isEmpty()) {
         QCOMPARE(spy.count(), 1);
         // if we caught a signal it should have the effect name we passed in
         QList<QVariant> arguments = spy.takeFirst();
         QCOMPARE(arguments.count(), 2);
         QCOMPARE(arguments.at(1).toString(), name.toLower());
     }
     spy.clear();
     QVERIFY(spy.isEmpty());
 
     // now if we wait for the events being processed, the effect will get deleted and it should load again
     QTest::qWait(1);
     QCOMPARE(loader.loadEffect(services.first(), loadFlags), expected);
     // signal spy should have got the signal if it was expected
     QCOMPARE(spy.isEmpty(), !expected);
     if (!spy.isEmpty()) {
         QCOMPARE(spy.count(), 1);
         // if we caught a signal it should have the effect name we passed in
         QList<QVariant> arguments = spy.takeFirst();
         QCOMPARE(arguments.count(), 2);
         QCOMPARE(arguments.at(1).toString(), name.toLower());
     }
 }
 
 void TestScriptedEffectLoader::testLoadAllEffects()
 {
     MockEffectsHandler mockHandler(KWin::XRenderCompositing);
     KWin::ScriptedEffectLoader loader;
 
     KSharedConfig::Ptr config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
 
     const QString kwin4 = QStringLiteral("kwin4_effect_");
 
     // prepare the configuration to hard enable/disable the effects we want to load
     KConfigGroup plugins = config->group("Plugins");
     plugins.writeEntry(kwin4 + QStringLiteral("dialogparentEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("fadeEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("fadedesktopEnabled"), false);
+    plugins.writeEntry(kwin4 + QStringLiteral("frozenappEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("loginEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("logoutEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("maximizeEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("minimizeanimationEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("scaleinEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("translucencyEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("eyeonscreenEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("windowapertureEnabled"), false);
     plugins.writeEntry(kwin4 + QStringLiteral("morphingpopupsEnabled"), false);
     plugins.sync();
 
     loader.setConfig(config);
 
     qRegisterMetaType<KWin::Effect*>();
     QSignalSpy spy(&loader, SIGNAL(effectLoaded(KWin::Effect*,QString)));
     // connect to signal to ensure that we delete the Effect again as the Effect doesn't have a parent
     connect(&loader, &KWin::ScriptedEffectLoader::effectLoaded,
         [](KWin::Effect *effect) {
             effect->deleteLater();
         }
     );
 
     // the config is prepared so that no Effect gets loaded!
     loader.queryAndLoadAll();
 
     // we need to wait some time because it's queued and in a thread
     QVERIFY(!spy.wait(100));
 
     // now let's prepare a config which has one effect explicitly enabled
     plugins.writeEntry(kwin4 + QStringLiteral("scaleinEnabled"), true);
     plugins.sync();
 
     loader.queryAndLoadAll();
     // should load one effect in first go
     QVERIFY(spy.wait(100));
     // and afterwards it should not load another one
     QVERIFY(!spy.wait(10));
 
     QCOMPARE(spy.size(), 1);
     // if we caught a signal it should have the effect name we passed in
     QList<QVariant> arguments = spy.takeFirst();
     QCOMPARE(arguments.count(), 2);
     QCOMPARE(arguments.at(1).toString(), kwin4 + QStringLiteral("scalein"));
     spy.clear();
 
     // let's delete one of the default entries
     plugins.deleteEntry(kwin4 + QStringLiteral("fadeEnabled"));
     plugins.sync();
 
     QVERIFY(spy.isEmpty());
     loader.queryAndLoadAll();
 
     // let's use qWait as we need to wait for two signals to be emitted
     QTRY_COMPARE(spy.size(), 2);
     QStringList loadedEffects;
     for (auto &list : spy) {
         QCOMPARE(list.size(), 2);
         loadedEffects << list.at(1).toString();
     }
     qSort(loadedEffects);
     QCOMPARE(loadedEffects.at(0), kwin4 + QStringLiteral("fade"));
     QCOMPARE(loadedEffects.at(1), kwin4 + QStringLiteral("scalein"));
 }
 
 void TestScriptedEffectLoader::testCancelLoadAllEffects()
 {
     // this test verifies that no test gets loaded when the loader gets cleared
     MockEffectsHandler mockHandler(KWin::XRenderCompositing);
     KWin::ScriptedEffectLoader loader;
 
     // prepare the configuration to hard enable/disable the effects we want to load
     KSharedConfig::Ptr config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
     const QString kwin4 = QStringLiteral("kwin4_effect_");
     KConfigGroup plugins = config->group("Plugins");
     plugins.writeEntry(kwin4 + QStringLiteral("scaleinEnabled"), true);
     plugins.sync();
 
     loader.setConfig(config);
 
     qRegisterMetaType<KWin::Effect*>();
     QSignalSpy spy(&loader, &KWin::ScriptedEffectLoader::effectLoaded);
     QVERIFY(spy.isValid());
 
     loader.queryAndLoadAll();
     loader.clear();
 
     // Should not load any effect
     QVERIFY(!spy.wait(100));
     QVERIFY(spy.isEmpty());
 }
 
 QTEST_MAIN(TestScriptedEffectLoader)
 #include "test_scripted_effectloader.moc"
diff --git a/client.cpp b/client.cpp
index 8c21ae66f..1ceeace7e 100644
--- a/client.cpp
+++ b/client.cpp
@@ -1,2191 +1,2210 @@
 /********************************************************************
  KWin - the KDE window manager
  This file is part of the KDE project.
 
 Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
 Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 // own
 #include "client.h"
 // kwin
 #ifdef KWIN_BUILD_ACTIVITIES
 #include "activities.h"
 #endif
 #include "atoms.h"
 #include "client_machine.h"
 #include "composite.h"
 #include "cursor.h"
 #include "deleted.h"
 #include "focuschain.h"
 #include "group.h"
 #include "shadow.h"
 #include "workspace.h"
 #include "screenedge.h"
 #include "decorations/decorationbridge.h"
 #include "decorations/decoratedclient.h"
 #include <KDecoration2/Decoration>
 #include <KDecoration2/DecoratedClient>
 // KDE
+#include <KLocalizedString>
 #include <KWindowSystem>
 #include <KColorScheme>
 // Qt
 #include <QApplication>
 #include <QDebug>
 #include <QFile>
 #include <QMouseEvent>
 #include <QProcess>
 #include <QStandardPaths>
 #include <QScriptEngine>
 #include <QScriptProgram>
 #include <QWhatsThis>
 // XLib
 #include <X11/Xutil.h>
 #include <fixx11h.h>
 // system
 #include <unistd.h>
 #include <signal.h>
 
 // Put all externs before the namespace statement to allow the linker
 // to resolve them properly
 
 namespace KWin
 {
 
 const long ClientWinMask = XCB_EVENT_MASK_KEY_PRESS | XCB_EVENT_MASK_KEY_RELEASE |
                            XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE |
                            XCB_EVENT_MASK_KEYMAP_STATE |
                            XCB_EVENT_MASK_BUTTON_MOTION |
                            XCB_EVENT_MASK_POINTER_MOTION | // need this, too!
                            XCB_EVENT_MASK_ENTER_WINDOW | XCB_EVENT_MASK_LEAVE_WINDOW |
                            XCB_EVENT_MASK_FOCUS_CHANGE |
                            XCB_EVENT_MASK_EXPOSURE |
                            XCB_EVENT_MASK_STRUCTURE_NOTIFY |
                            XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
 
 // Creating a client:
 //  - only by calling Workspace::createClient()
 //      - it creates a new client and calls manage() for it
 //
 // Destroying a client:
 //  - destroyClient() - only when the window itself has been destroyed
 //      - releaseWindow() - the window is kept, only the client itself is destroyed
 
 /**
  * \class Client client.h
  * \brief The Client class encapsulates a window decoration frame.
  */
 
 /**
  * This ctor is "dumb" - it only initializes data. All the real initialization
  * is done in manage().
  */
 Client::Client()
     : AbstractClient()
     , m_client()
     , m_wrapper()
     , m_frame()
     , m_activityUpdatesBlocked(false)
     , m_blockedActivityUpdatesRequireTransients(false)
     , m_moveResizeGrabWindow()
     , move_resize_has_keyboard_grab(false)
     , m_managed(false)
     , m_transientForId(XCB_WINDOW_NONE)
     , m_originalTransientForId(XCB_WINDOW_NONE)
     , shade_below(NULL)
     , m_motif(atoms->motif_wm_hints)
     , blocks_compositing(false)
     , shadeHoverTimer(NULL)
     , m_colormap(XCB_COLORMAP_NONE)
     , in_group(NULL)
     , tab_group(NULL)
     , ping_timer(NULL)
     , m_killHelperPID(0)
     , m_pingTimestamp(XCB_TIME_CURRENT_TIME)
     , m_userTime(XCB_TIME_CURRENT_TIME)   // Not known yet
     , allowed_actions(0)
     , shade_geometry_change(false)
     , sm_stacking_order(-1)
     , activitiesDefined(false)
     , needsSessionInteract(false)
     , needsXWindowMove(false)
     , m_decoInputExtent()
     , m_focusOutTimer(nullptr)
     , m_clientSideDecorated(false)
 {
     // TODO: Do all as initialization
     syncRequest.counter = syncRequest.alarm = XCB_NONE;
     syncRequest.timeout = syncRequest.failsafeTimeout = NULL;
     syncRequest.lastTimestamp = xTime();
     syncRequest.isPending = false;
 
     // Set the initial mapping state
     mapping_state = Withdrawn;
 
     info = NULL;
 
     shade_mode = ShadeNone;
     deleting = false;
     fullscreen_mode = FullScreenNone;
     hidden = false;
     noborder = false;
     app_noborder = false;
     ignore_focus_stealing = false;
     check_active_modal = false;
 
     max_mode = MaximizeRestore;
 
     //Client to workspace connections require that each
     //client constructed be connected to the workspace wrapper
 
     geom = QRect(0, 0, 100, 100);   // So that decorations don't start with size being (0,0)
     client_size = QSize(100, 100);
     ready_for_painting = false; // wait for first damage or sync reply
 
     connect(clientMachine(), &ClientMachine::localhostChanged, this, &Client::updateCaption);
     connect(options, &Options::condensedTitleChanged, this, &Client::updateCaption);
 
     connect(this, &Client::moveResizeCursorChanged, this, [this] (Qt::CursorShape cursor) {
         xcb_cursor_t nativeCursor = Cursor::x11Cursor(cursor);
         m_frame.defineCursor(nativeCursor);
         if (m_decoInputExtent.isValid())
             m_decoInputExtent.defineCursor(nativeCursor);
         if (isMoveResize()) {
             // changing window attributes doesn't change cursor if there's pointer grab active
             xcb_change_active_pointer_grab(connection(), nativeCursor, xTime(),
                 XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION | XCB_EVENT_MASK_ENTER_WINDOW | XCB_EVENT_MASK_LEAVE_WINDOW);
         }
     });
 
     // SELI TODO: Initialize xsizehints??
 }
 
 /**
  * "Dumb" destructor.
  */
 Client::~Client()
 {
     if (m_killHelperPID && !::kill(m_killHelperPID, 0)) { // means the process is alive
         ::kill(m_killHelperPID, SIGTERM);
         m_killHelperPID = 0;
     }
     //SWrapper::Client::clientRelease(this);
     if (syncRequest.alarm != XCB_NONE)
         xcb_sync_destroy_alarm(connection(), syncRequest.alarm);
     assert(!isMoveResize());
     assert(m_client == XCB_WINDOW_NONE);
     assert(m_wrapper == XCB_WINDOW_NONE);
     //assert( frameId() == None );
     assert(!check_active_modal);
     for (auto it = m_connections.constBegin(); it != m_connections.constEnd(); ++it) {
         disconnect(*it);
     }
 }
 
 // Use destroyClient() or releaseWindow(), Client instances cannot be deleted directly
 void Client::deleteClient(Client* c)
 {
     delete c;
 }
 
 /**
  * Releases the window. The client has done its job and the window is still existing.
  */
 void Client::releaseWindow(bool on_shutdown)
 {
     assert(!deleting);
     deleting = true;
     destroyWindowManagementInterface();
     Deleted* del = NULL;
     if (!on_shutdown) {
         del = Deleted::create(this);
     }
     if (isMoveResize())
         emit clientFinishUserMovedResized(this);
     emit windowClosed(this, del);
     finishCompositing();
     RuleBook::self()->discardUsed(this, true);   // Remove ForceTemporarily rules
     StackingUpdatesBlocker blocker(workspace());
     if (isMoveResize())
         leaveMoveResize();
     finishWindowRules();
     blockGeometryUpdates();
     if (isOnCurrentDesktop() && isShown(true))
         addWorkspaceRepaint(visibleRect());
     // Grab X during the release to make removing of properties, setting to withdrawn state
     // and repareting to root an atomic operation (http://lists.kde.org/?l=kde-devel&m=116448102901184&w=2)
     grabXServer();
     exportMappingState(WithdrawnState);
     setModal(false);   // Otherwise its mainwindow wouldn't get focus
     hidden = true; // So that it's not considered visible anymore (can't use hideClient(), it would set flags)
     if (!on_shutdown)
         workspace()->clientHidden(this);
     m_frame.unmap();  // Destroying decoration would cause ugly visual effect
     destroyDecoration();
     cleanGrouping();
     if (!on_shutdown) {
         workspace()->removeClient(this);
         // Only when the window is being unmapped, not when closing down KWin (NETWM sections 5.5,5.7)
         info->setDesktop(0);
         info->setState(0, info->state());  // Reset all state flags
     } else
         untab();
     xcb_connection_t *c = connection();
     m_client.deleteProperty(atoms->kde_net_wm_user_creation_time);
     m_client.deleteProperty(atoms->net_frame_extents);
     m_client.deleteProperty(atoms->kde_net_wm_frame_strut);
     m_client.reparent(rootWindow(), x(), y());
     xcb_change_save_set(c, XCB_SET_MODE_DELETE, m_client);
     m_client.selectInput(XCB_EVENT_MASK_NO_EVENT);
     if (on_shutdown)
         // Map the window, so it can be found after another WM is started
         m_client.map();
     // TODO: Preserve minimized, shaded etc. state?
     else // Make sure it's not mapped if the app unmapped it (#65279). The app
         // may do map+unmap before we initially map the window by calling rawShow() from manage().
         m_client.unmap();
     m_client.reset();
     m_wrapper.reset();
     m_frame.reset();
     //frame = None;
     unblockGeometryUpdates(); // Don't use GeometryUpdatesBlocker, it would now set the geometry
     if (!on_shutdown) {
         disownDataPassedToDeleted();
         del->unrefWindow();
     }
     checkNonExistentClients();
     deleteClient(this);
     ungrabXServer();
 }
 
 /**
  * Like releaseWindow(), but this one is called when the window has been already destroyed
  * (E.g. The application closed it)
  */
 void Client::destroyClient()
 {
     assert(!deleting);
     deleting = true;
     destroyWindowManagementInterface();
     Deleted* del = Deleted::create(this);
     if (isMoveResize())
         emit clientFinishUserMovedResized(this);
     emit windowClosed(this, del);
     finishCompositing(ReleaseReason::Destroyed);
     RuleBook::self()->discardUsed(this, true);   // Remove ForceTemporarily rules
     StackingUpdatesBlocker blocker(workspace());
     if (isMoveResize())
         leaveMoveResize();
     finishWindowRules();
     blockGeometryUpdates();
     if (isOnCurrentDesktop() && isShown(true))
         addWorkspaceRepaint(visibleRect());
     setModal(false);
     hidden = true; // So that it's not considered visible anymore
     workspace()->clientHidden(this);
     destroyDecoration();
     cleanGrouping();
     workspace()->removeClient(this);
     m_client.reset(); // invalidate
     m_wrapper.reset();
     m_frame.reset();
     //frame = None;
     unblockGeometryUpdates(); // Don't use GeometryUpdatesBlocker, it would now set the geometry
     disownDataPassedToDeleted();
     del->unrefWindow();
     checkNonExistentClients();
     deleteClient(this);
 }
 
 void Client::updateInputWindow()
 {
     if (!Xcb::Extensions::self()->isShapeInputAvailable())
         return;
 
     QRegion region;
 
     if (!noBorder() && isDecorated()) {
         const QMargins &r = decoration()->resizeOnlyBorders();
         const int left   = r.left();
         const int top    = r.top();
         const int right  = r.right();
         const int bottom = r.bottom();
         if (left != 0 || top != 0 || right != 0 || bottom != 0) {
             region = QRegion(-left,
                              -top,
                              decoration()->size().width() + left + right,
                              decoration()->size().height() + top + bottom);
             region = region.subtracted(decoration()->rect());
         }
     }
 
     if (region.isEmpty()) {
         m_decoInputExtent.reset();
         return;
     }
 
     QRect bounds = region.boundingRect();
     input_offset = bounds.topLeft();
 
     // Move the bounding rect to screen coordinates
     bounds.translate(geometry().topLeft());
 
     // Move the region to input window coordinates
     region.translate(-input_offset);
 
     if (!m_decoInputExtent.isValid()) {
         const uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
         const uint32_t values[] = {true,
             XCB_EVENT_MASK_ENTER_WINDOW   |
             XCB_EVENT_MASK_LEAVE_WINDOW   |
             XCB_EVENT_MASK_BUTTON_PRESS   |
             XCB_EVENT_MASK_BUTTON_RELEASE |
             XCB_EVENT_MASK_POINTER_MOTION
         };
         m_decoInputExtent.create(bounds, XCB_WINDOW_CLASS_INPUT_ONLY, mask, values);
         if (mapping_state == Mapped)
             m_decoInputExtent.map();
     } else {
         m_decoInputExtent.setGeometry(bounds);
     }
 
     const QVector<xcb_rectangle_t> rects = Xcb::regionToRects(region);
     xcb_shape_rectangles(connection(), XCB_SHAPE_SO_SET, XCB_SHAPE_SK_INPUT, XCB_CLIP_ORDERING_UNSORTED,
                          m_decoInputExtent, 0, 0, rects.count(), rects.constData());
 }
 
 void Client::updateDecoration(bool check_workspace_pos, bool force)
 {
     if (!force &&
             ((!isDecorated() && noBorder()) || (isDecorated() && !noBorder())))
         return;
     QRect oldgeom = geometry();
     QRect oldClientGeom = oldgeom.adjusted(borderLeft(), borderTop(), -borderRight(), -borderBottom());
     blockGeometryUpdates(true);
     if (force)
         destroyDecoration();
     if (!noBorder()) {
         createDecoration(oldgeom);
     } else
         destroyDecoration();
     getShadow();
     if (check_workspace_pos)
         checkWorkspacePosition(oldgeom, -2, oldClientGeom);
     updateInputWindow();
     blockGeometryUpdates(false);
     updateFrameExtents();
 }
 
 void Client::createDecoration(const QRect& oldgeom)
 {
     KDecoration2::Decoration *decoration = Decoration::DecorationBridge::self()->createDecoration(this);
     if (decoration) {
         QMetaObject::invokeMethod(decoration, "update", Qt::QueuedConnection);
         connect(decoration, &KDecoration2::Decoration::shadowChanged, this, &Toplevel::getShadow);
         connect(decoration, &KDecoration2::Decoration::resizeOnlyBordersChanged, this, &Client::updateInputWindow);
         connect(decoration, &KDecoration2::Decoration::bordersChanged, this,
             [this]() {
                 updateFrameExtents();
                 GeometryUpdatesBlocker blocker(this);
                 // TODO: this is obviously idempotent
                 // calculateGravitation(true) would have to operate on the old border sizes
 //                 move(calculateGravitation(true));
 //                 move(calculateGravitation(false));
                 QRect oldgeom = geometry();
                 plainResize(sizeForClientSize(clientSize()), ForceGeometrySet);
                 if (!isShade())
                     checkWorkspacePosition(oldgeom);
                 emit geometryShapeChanged(this, oldgeom);
             }
         );
         connect(decoratedClient()->decoratedClient(), &KDecoration2::DecoratedClient::widthChanged, this, &Client::updateInputWindow);
         connect(decoratedClient()->decoratedClient(), &KDecoration2::DecoratedClient::heightChanged, this, &Client::updateInputWindow);
     }
     setDecoration(decoration);
 
     move(calculateGravitation(false));
     plainResize(sizeForClientSize(clientSize()), ForceGeometrySet);
     if (Compositor::compositing()) {
         discardWindowPixmap();
     }
     emit geometryShapeChanged(this, oldgeom);
 }
 
 void Client::destroyDecoration()
 {
     QRect oldgeom = geometry();
     if (isDecorated()) {
         QPoint grav = calculateGravitation(true);
         AbstractClient::destroyDecoration();
         plainResize(sizeForClientSize(clientSize()), ForceGeometrySet);
         move(grav);
         if (compositing())
             discardWindowPixmap();
         if (!deleting) {
             emit geometryShapeChanged(this, oldgeom);
         }
     }
     m_decoInputExtent.reset();
 }
 
 void Client::layoutDecorationRects(QRect &left, QRect &top, QRect &right, QRect &bottom) const
 {
     if (!isDecorated()) {
         return;
     }
     QRect r = decoration()->rect();
 
     NETStrut strut = info->frameOverlap();
 
     // Ignore the overlap strut when compositing is disabled
     if (!compositing())
         strut.left = strut.top = strut.right = strut.bottom = 0;
     else if (strut.left == -1 && strut.top == -1 && strut.right == -1 && strut.bottom == -1) {
         top = QRect(r.x(), r.y(), r.width(), r.height() / 3);
         left = QRect(r.x(), r.y() + top.height(), width() / 2, r.height() / 3);
         right = QRect(r.x() + left.width(), r.y() + top.height(), r.width() - left.width(), left.height());
         bottom = QRect(r.x(), r.y() + top.height() + left.height(), r.width(), r.height() - left.height() - top.height());
         return;
     }
 
     top = QRect(r.x(), r.y(), r.width(), borderTop() + strut.top);
     bottom = QRect(r.x(), r.y() + r.height() - borderBottom() - strut.bottom,
                    r.width(), borderBottom() + strut.bottom);
     left = QRect(r.x(), r.y() + top.height(),
                  borderLeft() + strut.left, r.height() - top.height() - bottom.height());
     right = QRect(r.x() + r.width() - borderRight() - strut.right, r.y() + top.height(),
                   borderRight() + strut.right, r.height() - top.height() - bottom.height());
 }
 
 QRect Client::transparentRect() const
 {
     if (isShade())
         return QRect();
 
     NETStrut strut = info->frameOverlap();
     // Ignore the strut when compositing is disabled or the decoration doesn't support it
     if (!compositing())
         strut.left = strut.top = strut.right = strut.bottom = 0;
     else if (strut.left == -1 && strut.top == -1 && strut.right == -1 && strut.bottom == -1)
         return QRect();
 
     const QRect r = QRect(clientPos(), clientSize())
                     .adjusted(strut.left, strut.top, -strut.right, -strut.bottom);
     if (r.isValid())
         return r;
 
     return QRect();
 }
 
 void Client::detectNoBorder()
 {
     if (shape()) {
         noborder = true;
         app_noborder = true;
         return;
     }
     switch(windowType()) {
     case NET::Desktop :
     case NET::Dock :
     case NET::TopMenu :
     case NET::Splash :
     case NET::Notification :
     case NET::OnScreenDisplay :
         noborder = true;
         app_noborder = true;
         break;
     case NET::Unknown :
     case NET::Normal :
     case NET::Toolbar :
     case NET::Menu :
     case NET::Dialog :
     case NET::Utility :
         noborder = false;
         break;
     default:
         abort();
     }
     // NET::Override is some strange beast without clear definition, usually
     // just meaning "noborder", so let's treat it only as such flag, and ignore it as
     // a window type otherwise (SUPPORTED_WINDOW_TYPES_MASK doesn't include it)
     if (info->windowType(NET::OverrideMask) == NET::Override) {
         noborder = true;
         app_noborder = true;
     }
 }
 
 void Client::updateFrameExtents()
 {
     NETStrut strut;
     strut.left = borderLeft();
     strut.right = borderRight();
     strut.top = borderTop();
     strut.bottom = borderBottom();
     info->setFrameExtents(strut);
 }
 
 Xcb::Property Client::fetchGtkFrameExtents() const
 {
     return Xcb::Property(false, m_client, atoms->gtk_frame_extents, XCB_ATOM_CARDINAL, 0, 4);
 }
 
 void Client::readGtkFrameExtents(Xcb::Property &prop)
 {
     m_clientSideDecorated = !prop.isNull() && prop->type != 0;
     emit clientSideDecoratedChanged();
 }
 
 void Client::detectGtkFrameExtents()
 {
     Xcb::Property prop = fetchGtkFrameExtents();
     readGtkFrameExtents(prop);
 }
 
 /**
  * Resizes the decoration, and makes sure the decoration widget gets resize event
  * even if the size hasn't changed. This is needed to make sure the decoration
  * re-layouts (e.g. when maximization state changes,
  * the decoration may alter some borders, but the actual size
  * of the decoration stays the same).
  */
 void Client::resizeDecoration()
 {
     triggerDecorationRepaint();
     updateInputWindow();
 }
 
 bool Client::noBorder() const
 {
     return noborder || isFullScreen();
 }
 
 bool Client::userCanSetNoBorder() const
 {
     return !isFullScreen() && !isShade() && !tabGroup();
 }
 
 void Client::setNoBorder(bool set)
 {
     if (!userCanSetNoBorder())
         return;
     set = rules()->checkNoBorder(set);
     if (noborder == set)
         return;
     noborder = set;
     updateDecoration(true, false);
     updateWindowRules(Rules::NoBorder);
 }
 
 void Client::checkNoBorder()
 {
     setNoBorder(app_noborder);
 }
 
 bool Client::wantsShadowToBeRendered() const
 {
     return !isFullScreen() && maximizeMode() != MaximizeFull;
 }
 
 void Client::updateShape()
 {
     if (shape()) {
         // Workaround for #19644 - Shaped windows shouldn't have decoration
         if (!app_noborder) {
             // Only when shape is detected for the first time, still let the user to override
             app_noborder = true;
             noborder = rules()->checkNoBorder(true);
             updateDecoration(true);
         }
         if (noBorder()) {
             xcb_shape_combine(connection(), XCB_SHAPE_SO_SET, XCB_SHAPE_SK_BOUNDING, XCB_SHAPE_SK_BOUNDING,
                               frameId(), clientPos().x(), clientPos().y(), window());
         }
     } else if (app_noborder) {
         xcb_shape_mask(connection(), XCB_SHAPE_SO_SET, XCB_SHAPE_SK_BOUNDING, frameId(), 0, 0, XCB_PIXMAP_NONE);
         detectNoBorder();
         app_noborder = noborder;
         noborder = rules()->checkNoBorder(noborder || m_motif.noBorder());
         updateDecoration(true);
     }
 
     // Decoration mask (i.e. 'else' here) setting is done in setMask()
     // when the decoration calls it or when the decoration is created/destroyed
     updateInputShape();
     if (compositing()) {
         addRepaintFull();
         addWorkspaceRepaint(visibleRect());   // In case shape change removes part of this window
     }
     emit geometryShapeChanged(this, geometry());
 }
 
 static Xcb::Window shape_helper_window(XCB_WINDOW_NONE);
 
 void Client::cleanupX11()
 {
     shape_helper_window.reset();
 }
 
 void Client::updateInputShape()
 {
     if (hiddenPreview())   // Sets it to none, don't change
         return;
     if (Xcb::Extensions::self()->isShapeInputAvailable()) {
         // There appears to be no way to find out if a window has input
         // shape set or not, so always propagate the input shape
         // (it's the same like the bounding shape by default).
         // Also, build the shape using a helper window, not directly
         // in the frame window, because the sequence set-shape-to-frame,
         // remove-shape-of-client, add-input-shape-of-client has the problem
         // that after the second step there's a hole in the input shape
         // until the real shape of the client is added and that can make
         // the window lose focus (which is a problem with mouse focus policies)
         // TODO: It seems there is, after all - XShapeGetRectangles() - but maybe this is better
         if (!shape_helper_window.isValid())
             shape_helper_window.create(QRect(0, 0, 1, 1));
         shape_helper_window.resize(width(), height());
         xcb_connection_t *c = connection();
         xcb_shape_combine(c, XCB_SHAPE_SO_SET, XCB_SHAPE_SK_INPUT, XCB_SHAPE_SK_BOUNDING,
                           shape_helper_window, 0, 0, frameId());
         xcb_shape_combine(c, XCB_SHAPE_SO_SUBTRACT, XCB_SHAPE_SK_INPUT, XCB_SHAPE_SK_BOUNDING,
                           shape_helper_window, clientPos().x(), clientPos().y(), window());
         xcb_shape_combine(c, XCB_SHAPE_SO_UNION, XCB_SHAPE_SK_INPUT, XCB_SHAPE_SK_INPUT,
                           shape_helper_window, clientPos().x(), clientPos().y(), window());
         xcb_shape_combine(c, XCB_SHAPE_SO_SET, XCB_SHAPE_SK_INPUT, XCB_SHAPE_SK_INPUT,
                           frameId(), 0, 0, shape_helper_window);
     }
 }
 
 void Client::hideClient(bool hide)
 {
     if (hidden == hide)
         return;
     hidden = hide;
     updateVisibility();
 }
 
 /**
  * Returns whether the window is minimizable or not
  */
 bool Client::isMinimizable() const
 {
     if (isSpecialWindow() && !isTransient())
         return false;
     if (!rules()->checkMinimize(true))
         return false;
 
     if (isTransient()) {
         // #66868 - Let other xmms windows be minimized when the mainwindow is minimized
         bool shown_mainwindow = false;
         auto mainclients = mainClients();
         for (auto it = mainclients.constBegin();
                 it != mainclients.constEnd();
                 ++it)
             if ((*it)->isShown(true))
                 shown_mainwindow = true;
         if (!shown_mainwindow)
             return true;
     }
 #if 0
     // This is here because kicker's taskbar doesn't provide separate entries
     // for windows with an explicitly given parent
     // TODO: perhaps this should be redone
     // Disabled for now, since at least modal dialogs should be minimizable
     // (resulting in the mainwindow being minimized too).
     if (transientFor() != NULL)
         return false;
 #endif
     if (!wantsTabFocus())   // SELI, TODO: - NET::Utility? why wantsTabFocus() - skiptaskbar? ?
         return false;
     return true;
 }
 
 void Client::doMinimize()
 {
     updateVisibility();
     updateAllowedActions();
     workspace()->updateMinimizedOfTransients(this);
     // Update states of all other windows in this group
     if (tabGroup())
         tabGroup()->updateStates(this, TabGroup::Minimized);
 }
 
 QRect Client::iconGeometry() const
 {
     NETRect r = info->iconGeometry();
     QRect geom(r.pos.x, r.pos.y, r.size.width, r.size.height);
     if (geom.isValid())
         return geom;
     else {
         // Check all mainwindows of this window (recursively)
         foreach (AbstractClient * amainwin, mainClients()) {
             Client *mainwin = dynamic_cast<Client*>(amainwin);
             if (!mainwin) {
                 continue;
             }
             geom = mainwin->iconGeometry();
             if (geom.isValid())
                 return geom;
         }
         // No mainwindow (or their parents) with icon geometry was found
         return AbstractClient::iconGeometry();
     }
 }
 
 bool Client::isShadeable() const
 {
     return !isSpecialWindow() && !noBorder() && (rules()->checkShade(ShadeNormal) != rules()->checkShade(ShadeNone));
 }
 
 void Client::setShade(ShadeMode mode)
 {
     if (mode == ShadeHover && isMove())
         return; // causes geometry breaks and is probably nasty
     if (isSpecialWindow() || noBorder())
         mode = ShadeNone;
     mode = rules()->checkShade(mode);
     if (shade_mode == mode)
         return;
     bool was_shade = isShade();
     ShadeMode was_shade_mode = shade_mode;
     shade_mode = mode;
 
     // Decorations may turn off some borders when shaded
     // this has to happen _before_ the tab alignment since it will restrict the minimum geometry
 #if 0
     if (decoration)
         decoration->borders(border_left, border_right, border_top, border_bottom);
 #endif
 
     // Update states of all other windows in this group
     if (tabGroup())
         tabGroup()->updateStates(this, TabGroup::Shaded);
 
     if (was_shade == isShade()) {
         // Decoration may want to update after e.g. hover-shade changes
         emit shadeChanged();
         return; // No real change in shaded state
     }
 
     assert(isDecorated());   // noborder windows can't be shaded
     GeometryUpdatesBlocker blocker(this);
 
     // TODO: All this unmapping, resizing etc. feels too much duplicated from elsewhere
     if (isShade()) {
         // shade_mode == ShadeNormal
         addWorkspaceRepaint(visibleRect());
         // Shade
         shade_geometry_change = true;
         QSize s(sizeForClientSize(QSize(clientSize())));
         s.setHeight(borderTop() + borderBottom());
         m_wrapper.selectInput(ClientWinMask);   // Avoid getting UnmapNotify
         m_wrapper.unmap();
         m_client.unmap();
         m_wrapper.selectInput(ClientWinMask | XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY);
         exportMappingState(IconicState);
         plainResize(s);
         shade_geometry_change = false;
         if (was_shade_mode == ShadeHover) {
             if (shade_below && workspace()->stackingOrder().indexOf(shade_below) > -1)
                     workspace()->restack(this, shade_below, true);
             if (isActive())
                 workspace()->activateNextClient(this);
         } else if (isActive()) {
             workspace()->focusToNull();
         }
     } else {
         shade_geometry_change = true;
         if (decoratedClient())
             decoratedClient()->signalShadeChange();
         QSize s(sizeForClientSize(clientSize()));
         shade_geometry_change = false;
         plainResize(s);
         geom_restore = geometry();
         if ((shade_mode == ShadeHover || shade_mode == ShadeActivated) && rules()->checkAcceptFocus(info->input()))
             setActive(true);
         if (shade_mode == ShadeHover) {
             ToplevelList order = workspace()->stackingOrder();
             // invalidate, since "this" could be the topmost toplevel and shade_below dangeling
             shade_below = NULL;
             // this is likely related to the index parameter?!
             for (int idx = order.indexOf(this) + 1; idx < order.count(); ++idx) {
                 shade_below = qobject_cast<Client*>(order.at(idx));
                 if (shade_below) {
                     break;
                 }
             }
             if (shade_below && shade_below->isNormalWindow())
                 workspace()->raiseClient(this);
             else
                 shade_below = NULL;
         }
         m_wrapper.map();
         m_client.map();
         exportMappingState(NormalState);
         if (isActive())
             workspace()->requestFocus(this);
     }
     info->setState(isShade() ? NET::Shaded : NET::States(0), NET::Shaded);
     info->setState(isShown(false) ? NET::States(0) : NET::Hidden, NET::Hidden);
     discardWindowPixmap();
     updateVisibility();
     updateAllowedActions();
     updateWindowRules(Rules::Shade);
 
     emit shadeChanged();
 }
 
 void Client::shadeHover()
 {
     setShade(ShadeHover);
     cancelShadeHoverTimer();
 }
 
 void Client::shadeUnhover()
 {
     if (!tabGroup() || tabGroup()->current() == this ||
         tabGroup()->current()->shadeMode() == ShadeNormal)
         setShade(ShadeNormal);
     cancelShadeHoverTimer();
 }
 
 void Client::cancelShadeHoverTimer()
 {
     delete shadeHoverTimer;
     shadeHoverTimer = 0;
 }
 
 void Client::toggleShade()
 {
     // If the mode is ShadeHover or ShadeActive, cancel shade too
     setShade(shade_mode == ShadeNone ? ShadeNormal : ShadeNone);
 }
 
 void Client::updateVisibility()
 {
     if (deleting)
         return;
     if (hidden && isCurrentTab()) {
         info->setState(NET::Hidden, NET::Hidden);
         setSkipTaskbar(true);   // Also hide from taskbar
         if (compositing() && options->hiddenPreviews() == HiddenPreviewsAlways)
             internalKeep();
         else
             internalHide();
         return;
     }
     if (isCurrentTab())
         setSkipTaskbar(originalSkipTaskbar());   // Reset from 'hidden'
     if (isMinimized()) {
         info->setState(NET::Hidden, NET::Hidden);
         if (compositing() && options->hiddenPreviews() == HiddenPreviewsAlways)
             internalKeep();
         else
             internalHide();
         return;
     }
     info->setState(0, NET::Hidden);
     if (!isOnCurrentDesktop()) {
         if (compositing() && options->hiddenPreviews() != HiddenPreviewsNever)
             internalKeep();
         else
             internalHide();
         return;
     }
     if (!isOnCurrentActivity()) {
         if (compositing() && options->hiddenPreviews() != HiddenPreviewsNever)
             internalKeep();
         else
             internalHide();
         return;
     }
     internalShow();
 }
 
 
 /**
  * Sets the client window's mapping state. Possible values are
  * WithdrawnState, IconicState, NormalState.
  */
 void Client::exportMappingState(int s)
 {
     assert(m_client != XCB_WINDOW_NONE);
     assert(!deleting || s == WithdrawnState);
     if (s == WithdrawnState) {
         m_client.deleteProperty(atoms->wm_state);
         return;
     }
     assert(s == NormalState || s == IconicState);
 
     int32_t data[2];
     data[0] = s;
     data[1] = XCB_NONE;
     m_client.changeProperty(atoms->wm_state, atoms->wm_state, 32, 2, data);
 }
 
 void Client::internalShow()
 {
     if (mapping_state == Mapped)
         return;
     MappingState old = mapping_state;
     mapping_state = Mapped;
     if (old == Unmapped || old == Withdrawn)
         map();
     if (old == Kept) {
         m_decoInputExtent.map();
         updateHiddenPreview();
     }
     emit windowShown(this);
 }
 
 void Client::internalHide()
 {
     if (mapping_state == Unmapped)
         return;
     MappingState old = mapping_state;
     mapping_state = Unmapped;
     if (old == Mapped || old == Kept)
         unmap();
     if (old == Kept)
         updateHiddenPreview();
     addWorkspaceRepaint(visibleRect());
     workspace()->clientHidden(this);
     emit windowHidden(this);
 }
 
 void Client::internalKeep()
 {
     assert(compositing());
     if (mapping_state == Kept)
         return;
     MappingState old = mapping_state;
     mapping_state = Kept;
     if (old == Unmapped || old == Withdrawn)
         map();
     m_decoInputExtent.unmap();
     if (isActive())
         workspace()->focusToNull(); // get rid of input focus, bug #317484
     updateHiddenPreview();
     addWorkspaceRepaint(visibleRect());
     workspace()->clientHidden(this);
 }
 
 /**
  * Maps (shows) the client. Note that it is mapping state of the frame,
  * not necessarily the client window itself (i.e. a shaded window is here
  * considered mapped, even though it is in IconicState).
  */
 void Client::map()
 {
     // XComposite invalidates backing pixmaps on unmap (minimize, different
     // virtual desktop, etc.).  We kept the last known good pixmap around
     // for use in effects, but now we want to have access to the new pixmap
     if (compositing())
         discardWindowPixmap();
     m_frame.map();
     if (!isShade()) {
         m_wrapper.map();
         m_client.map();
         m_decoInputExtent.map();
         exportMappingState(NormalState);
     } else
         exportMappingState(IconicState);
     addLayerRepaint(visibleRect());
 }
 
 /**
  * Unmaps the client. Again, this is about the frame.
  */
 void Client::unmap()
 {
     // Here it may look like a race condition, as some other client might try to unmap
     // the window between these two XSelectInput() calls. However, they're supposed to
     // use XWithdrawWindow(), which also sends a synthetic event to the root window,
     // which won't be missed, so this shouldn't be a problem. The chance the real UnmapNotify
     // will be missed is also very minimal, so I don't think it's needed to grab the server
     // here.
     m_wrapper.selectInput(ClientWinMask);   // Avoid getting UnmapNotify
     m_frame.unmap();
     m_wrapper.unmap();
     m_client.unmap();
     m_decoInputExtent.unmap();
     m_wrapper.selectInput(ClientWinMask | XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY);
     exportMappingState(IconicState);
 }
 
 /**
  * XComposite doesn't keep window pixmaps of unmapped windows, which means
  * there wouldn't be any previews of windows that are minimized or on another
  * virtual desktop. Therefore rawHide() actually keeps such windows mapped.
  * However special care needs to be taken so that such windows don't interfere.
  * Therefore they're put very low in the stacking order and they have input shape
  * set to none, which hopefully is enough. If there's no input shape available,
  * then it's hoped that there will be some other desktop above it *shrug*.
  * Using normal shape would be better, but that'd affect other things, e.g. painting
  * of the actual preview.
  */
 void Client::updateHiddenPreview()
 {
     if (hiddenPreview()) {
         workspace()->forceRestacking();
         if (Xcb::Extensions::self()->isShapeInputAvailable()) {
             xcb_shape_rectangles(connection(), XCB_SHAPE_SO_SET, XCB_SHAPE_SK_INPUT,
                                  XCB_CLIP_ORDERING_UNSORTED, frameId(), 0, 0, 0, NULL);
         }
     } else {
         workspace()->forceRestacking();
         updateInputShape();
     }
 }
 
 void Client::sendClientMessage(xcb_window_t w, xcb_atom_t a, xcb_atom_t protocol, uint32_t data1, uint32_t data2, uint32_t data3, xcb_timestamp_t timestamp)
 {
     xcb_client_message_event_t ev;
     memset(&ev, 0, sizeof(ev));
     ev.response_type = XCB_CLIENT_MESSAGE;
     ev.window = w;
     ev.type = a;
     ev.format = 32;
     ev.data.data32[0] = protocol;
     ev.data.data32[1] = timestamp;
     ev.data.data32[2] = data1;
     ev.data.data32[3] = data2;
     ev.data.data32[4] = data3;
     uint32_t eventMask = 0;
     if (w == rootWindow()) {
         eventMask = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT; // Magic!
     }
     xcb_send_event(connection(), false, w, eventMask, reinterpret_cast<const char*>(&ev));
     xcb_flush(connection());
 }
 
 /**
  * Returns whether the window may be closed (have a close button)
  */
 bool Client::isCloseable() const
 {
     return rules()->checkCloseable(m_motif.close() && !isSpecialWindow());
 }
 
 /**
  * Closes the window by either sending a delete_window message or using XKill.
  */
 void Client::closeWindow()
 {
     if (!isCloseable())
         return;
 
     // Update user time, because the window may create a confirming dialog.
     updateUserTime();
 
     if (info->supportsProtocol(NET::DeleteWindowProtocol)) {
         sendClientMessage(window(), atoms->wm_protocols, atoms->wm_delete_window);
         pingWindow();
     } else // Client will not react on wm_delete_window. We have not choice
         // but destroy his connection to the XServer.
         killWindow();
 }
 
 
 /**
  * Kills the window via XKill
  */
 void Client::killWindow()
 {
     qCDebug(KWIN_CORE) << "Client::killWindow():" << caption();
     killProcess(false);
     m_client.kill();  // Always kill this client at the server
     destroyClient();
 }
 
 /**
  * Send a ping to the window using _NET_WM_PING if possible if it
  * doesn't respond within a reasonable time, it will be killed.
  */
 void Client::pingWindow()
 {
     if (!info->supportsProtocol(NET::PingProtocol))
         return; // Can't ping :(
     if (options->killPingTimeout() == 0)
         return; // Turned off
     if (ping_timer != NULL)
         return; // Pinging already
     ping_timer = new QTimer(this);
     connect(ping_timer, &QTimer::timeout, this,
         [this]() {
-            qCDebug(KWIN_CORE) << "Ping timeout:" << caption();
-            ping_timer->deleteLater();
-            ping_timer = nullptr;
-            killProcess(true, m_pingTimestamp);
+            if (unresponsive()) {
+                qCDebug(KWIN_CORE) << "Final ping timeout, asking to kill:" << caption();
+                ping_timer->deleteLater();
+                ping_timer = nullptr;
+                killProcess(true, m_pingTimestamp);
+                return;
+            }
+
+            qCDebug(KWIN_CORE) << "First ping timeout:" << caption();
+
+            setUnresponsive(true);
+            ping_timer->start();
         }
     );
     ping_timer->setSingleShot(true);
-    ping_timer->start(options->killPingTimeout());
+    // we'll run the timer twice, at first we'll desaturate the window
+    // and the second time we'll show the "do you want to kill" prompt
+    ping_timer->start(options->killPingTimeout() / 2);
     m_pingTimestamp = xTime();
     workspace()->sendPingToWindow(window(), m_pingTimestamp);
 }
 
 void Client::gotPing(xcb_timestamp_t timestamp)
 {
     // Just plain compare is not good enough because of 64bit and truncating and whatnot
     if (NET::timestampCompare(timestamp, m_pingTimestamp) != 0)
         return;
     delete ping_timer;
     ping_timer = NULL;
+
+    setUnresponsive(false);
+
     if (m_killHelperPID && !::kill(m_killHelperPID, 0)) { // means the process is alive
         ::kill(m_killHelperPID, SIGTERM);
         m_killHelperPID = 0;
     }
 }
 
 void Client::killProcess(bool ask, xcb_timestamp_t timestamp)
 {
     if (m_killHelperPID && !::kill(m_killHelperPID, 0)) // means the process is alive
         return;
     Q_ASSERT(!ask || timestamp != XCB_TIME_CURRENT_TIME);
     pid_t pid = info->pid();
     if (pid <= 0 || clientMachine()->hostName().isEmpty())  // Needed properties missing
         return;
     qCDebug(KWIN_CORE) << "Kill process:" << pid << "(" << clientMachine()->hostName() << ")";
     if (!ask) {
         if (!clientMachine()->isLocal()) {
             QStringList lst;
             lst << QString::fromUtf8(clientMachine()->hostName()) << QStringLiteral("kill") << QString::number(pid);
             QProcess::startDetached(QStringLiteral("xon"), lst);
         } else
             ::kill(pid, SIGTERM);
     } else {
         QString hostname = clientMachine()->isLocal() ? QStringLiteral("localhost") : QString::fromUtf8(clientMachine()->hostName());
         QProcess::startDetached(QStringLiteral(KWIN_KILLER_BIN),
                                 QStringList() << QStringLiteral("--pid") << QString::number(unsigned(pid)) << QStringLiteral("--hostname") << hostname
                                 << QStringLiteral("--windowname") << caption()
                                 << QStringLiteral("--applicationname") << QString::fromUtf8(resourceClass())
                                 << QStringLiteral("--wid") << QString::number(window())
                                 << QStringLiteral("--timestamp") << QString::number(timestamp),
                                 QString(), &m_killHelperPID);
     }
 }
 
 void Client::doSetSkipTaskbar()
 {
     info->setState(skipTaskbar() ? NET::SkipTaskbar : NET::States(0), NET::SkipTaskbar);
 }
 
 void Client::doSetSkipPager()
 {
     info->setState(skipPager() ? NET::SkipPager : NET::States(0), NET::SkipPager);
 }
 
 void Client::doSetDesktop(int desktop, int was_desk)
 {
     Q_UNUSED(desktop)
     Q_UNUSED(was_desk)
     updateVisibility();
 
     // Update states of all other windows in this group
     if (tabGroup())
         tabGroup()->updateStates(this, TabGroup::Desktop);
 }
 
 /**
  * Sets whether the client is on @p activity.
  * If you remove it from its last activity, then it's on all activities.
  *
  * Note: If it was on all activities and you try to remove it from one, nothing will happen;
  * I don't think that's an important enough use case to handle here.
  */
 void Client::setOnActivity(const QString &activity, bool enable)
 {
 #ifdef KWIN_BUILD_ACTIVITIES
     if (! Activities::self()) {
         return;
     }
     QStringList newActivitiesList = activities();
     if (newActivitiesList.contains(activity) == enable)   //nothing to do
         return;
     if (enable) {
         QStringList allActivities = Activities::self()->all();
         if (!allActivities.contains(activity))   //bogus ID
             return;
         newActivitiesList.append(activity);
     } else
         newActivitiesList.removeOne(activity);
     setOnActivities(newActivitiesList);
 #else
     Q_UNUSED(activity)
     Q_UNUSED(enable)
 #endif
 }
 
 /**
  * set exactly which activities this client is on
  */
 void Client::setOnActivities(QStringList newActivitiesList)
 {
 #ifdef KWIN_BUILD_ACTIVITIES
     if (!Activities::self()) {
         return;
     }
     QString joinedActivitiesList = newActivitiesList.join(QStringLiteral(","));
     joinedActivitiesList = rules()->checkActivity(joinedActivitiesList, false);
     newActivitiesList = joinedActivitiesList.split(u',', QString::SkipEmptyParts);
 
     QStringList allActivities = Activities::self()->all();
 
     auto it = newActivitiesList.begin();
     while (it != newActivitiesList.end()) {
         if (! allActivities.contains(*it)) {
             it = newActivitiesList.erase(it);
         } else {
             it++;
         }
     }
 
     if (// If we got the request to be on all activities explicitly
         newActivitiesList.isEmpty() || joinedActivitiesList == Activities::nullUuid() ||
         // If we got a list of activities that covers all activities
         (newActivitiesList.count() > 1 && newActivitiesList.count() == allActivities.count())) {
 
         activityList.clear();
         const QByteArray nullUuid = Activities::nullUuid().toUtf8();
         m_client.changeProperty(atoms->activities, XCB_ATOM_STRING, 8, nullUuid.length(), nullUuid.constData());
 
     } else {
         QByteArray joined = joinedActivitiesList.toAscii();
         activityList = newActivitiesList;
         m_client.changeProperty(atoms->activities, XCB_ATOM_STRING, 8, joined.length(), joined.constData());
     }
 
     updateActivities(false);
 #else
     Q_UNUSED(newActivitiesList)
 #endif
 }
 
 void Client::blockActivityUpdates(bool b)
 {
     if (b) {
         ++m_activityUpdatesBlocked;
     } else {
         Q_ASSERT(m_activityUpdatesBlocked);
         --m_activityUpdatesBlocked;
         if (!m_activityUpdatesBlocked)
             updateActivities(m_blockedActivityUpdatesRequireTransients);
     }
 }
 
 /**
  * update after activities changed
  */
 void Client::updateActivities(bool includeTransients)
 {
     if (m_activityUpdatesBlocked) {
         m_blockedActivityUpdatesRequireTransients |= includeTransients;
         return;
     }
     emit activitiesChanged(this);
     m_blockedActivityUpdatesRequireTransients = false; // reset
     FocusChain::self()->update(this, FocusChain::MakeFirst);
     updateVisibility();
     updateWindowRules(Rules::Activity);
 
     // Update states of all other windows in this group
     if (tabGroup())
         tabGroup()->updateStates(this, TabGroup::Activity);
 }
 
 /**
  * Returns the virtual desktop within the workspace() the client window
  * is located in, 0 if it isn't located on any special desktop (not mapped yet),
  * or NET::OnAllDesktops. Do not use desktop() directly, use
  * isOnDesktop() instead.
  */
 int Client::desktop() const
 {
     if (needsSessionInteract) {
         return NET::OnAllDesktops;
     }
     return AbstractClient::desktop();
 }
 
 /**
  * Returns the list of activities the client window is on.
  * if it's on all activities, the list will be empty.
  * Don't use this, use isOnActivity() and friends (from class Toplevel)
  */
 QStringList Client::activities() const
 {
     if (needsSessionInteract) {
         return QStringList();
     }
     return activityList;
 }
 
 /**
  * if @p on is true, sets on all activities.
  * if it's false, sets it to only be on the current activity
  */
 void Client::setOnAllActivities(bool on)
 {
 #ifdef KWIN_BUILD_ACTIVITIES
     if (on == isOnAllActivities())
         return;
     if (on) {
         setOnActivities(QStringList());
 
     } else {
         setOnActivity(Activities::self()->current(), true);
     }
 #else
     Q_UNUSED(on)
 #endif
 }
 
 /**
  * Performs the actual focusing of the window using XSetInputFocus and WM_TAKE_FOCUS
  */
 void Client::takeFocus()
 {
     if (rules()->checkAcceptFocus(info->input()))
         m_client.focus();
     else
         demandAttention(false); // window cannot take input, at least withdraw urgency
     if (info->supportsProtocol(NET::TakeFocusProtocol)) {
         sendClientMessage(window(), atoms->wm_protocols, atoms->wm_take_focus, 0, 0, 0, XCB_CURRENT_TIME);
     }
     workspace()->setShouldGetFocus(this);
 
     bool breakShowingDesktop = !keepAbove();
     if (breakShowingDesktop) {
         foreach (const Client *c, group()->members()) {
             if (c->isDesktop()) {
                 breakShowingDesktop = false;
                 break;
             }
         }
     }
     if (breakShowingDesktop)
         workspace()->setShowingDesktop(false);
 }
 
 /**
  * Returns whether the window provides context help or not. If it does,
  * you should show a help menu item or a help button like '?' and call
  * contextHelp() if this is invoked.
  *
  * \sa contextHelp()
  */
 bool Client::providesContextHelp() const
 {
     return info->supportsProtocol(NET::ContextHelpProtocol);
 }
 
 /**
  * Invokes context help on the window. Only works if the window
  * actually provides context help.
  *
  * \sa providesContextHelp()
  */
 void Client::showContextHelp()
 {
     if (info->supportsProtocol(NET::ContextHelpProtocol)) {
         sendClientMessage(window(), atoms->wm_protocols, atoms->net_wm_context_help);
         QWhatsThis::enterWhatsThisMode(); // SELI TODO: ?
     }
 }
 
 /**
  * Fetches the window's caption (WM_NAME property). It will be
  * stored in the client's caption().
  */
 void Client::fetchName()
 {
     setCaption(readName());
 }
 
 QString Client::readName() const
 {
     if (info->name() && info->name()[0] != '\0')
         return QString::fromUtf8(info->name()).simplified();
     else
         return KWindowSystem::readNameProperty(window(), XCB_ATOM_WM_NAME).simplified();
 }
 
 // The list is taken from http://www.unicode.org/reports/tr9/ (#154840)
 static const QChar LRM(0x200E);
 static const QChar RLM(0x200F);
 static const QChar LRE(0x202A);
 static const QChar RLE(0x202B);
 static const QChar LRO(0x202D);
 static const QChar RLO(0x202E);
 static const QChar PDF(0x202C);
 
 void Client::setCaption(const QString& _s, bool force)
 {
     if (!force && _s == cap_normal)
         return;
     QString s(_s);
     for (int i = 0; i < s.length(); ++i)
         if (!s[i].isPrint())
             s[i] = QChar(u' ');
     cap_normal = s;
     if (options->condensedTitle()) {
         static QScriptEngine engine;
         static QScriptProgram stripTitle;
         static QScriptValue script;
         if (stripTitle.isNull()) {
             const QString scriptFile = QStandardPaths::locate(QStandardPaths::GenericDataLocation, QStringLiteral(KWIN_NAME "/stripTitle.js"));
             if (!scriptFile.isEmpty()) {
                 QFile f(scriptFile);
                 if (f.open(QIODevice::ReadOnly|QIODevice::Text)) {
                     f.reset();
                     stripTitle = QScriptProgram(QString::fromLocal8Bit(f.readAll()), QStringLiteral("stripTitle.js"));
                     f.close();
                 }
             }
             if (stripTitle.isNull())
                 stripTitle = QScriptProgram(QStringLiteral("(function(title, wm_name, wm_class){ return title ; })"), QStringLiteral("stripTitle.js"));
             script = engine.evaluate(stripTitle);
         }
         QScriptValueList args;
         args << _s << QString::fromUtf8(resourceName()) << QString::fromUtf8(resourceClass());
         s = script.call(QScriptValue(), args).toString();
     }
     if (!force && s == cap_deco)
         return;
     cap_deco = s;
 
     bool reset_name = force;
     bool was_suffix = (!cap_suffix.isEmpty());
     cap_suffix.clear();
     QString machine_suffix;
     if (!options->condensedTitle()) { // machine doesn't qualify for "clean"
         if (clientMachine()->hostName() != ClientMachine::localhost() && !clientMachine()->isLocal())
             machine_suffix = QLatin1String(" <@") + QString::fromUtf8(clientMachine()->hostName()) + QLatin1Char('>') + LRM;
     }
     QString shortcut_suffix = !shortcut().isEmpty() ? (QLatin1String(" {") + shortcut().toString() + QLatin1Char('}')) : QString();
     cap_suffix = machine_suffix + shortcut_suffix;
     auto fetchNameInternalPredicate = [this](const Client *cl) {
         return (!cl->isSpecialWindow() || cl->isToolbar()) &&
                 cl != this && cl->caption() == caption();
     };
     if ((!isSpecialWindow() || isToolbar()) && workspace()->findClient(fetchNameInternalPredicate)) {
         int i = 2;
         do {
             cap_suffix = machine_suffix + QLatin1String(" <") + QString::number(i) + QLatin1Char('>') + LRM;
             i++;
         } while (workspace()->findClient(fetchNameInternalPredicate));
         info->setVisibleName(caption().toUtf8().constData());
         reset_name = false;
     }
     if ((was_suffix && cap_suffix.isEmpty()) || reset_name) {
         // If it was new window, it may have old value still set, if the window is reused
         info->setVisibleName("");
         info->setVisibleIconName("");
     } else if (!cap_suffix.isEmpty() && !cap_iconic.isEmpty())
         // Keep the same suffix in iconic name if it's set
         info->setVisibleIconName(QString(cap_iconic + cap_suffix).toUtf8().constData());
 
     emit captionChanged();
 }
 
 void Client::updateCaption()
 {
     setCaption(cap_normal, true);
 }
 
 void Client::evaluateWindowRules()
 {
     setupWindowRules(true);
     applyWindowRules();
 }
 
 void Client::fetchIconicName()
 {
     QString s;
     if (info->iconName() && info->iconName()[0] != '\0')
         s = QString::fromUtf8(info->iconName());
     else
         s = KWindowSystem::readNameProperty(window(), XCB_ATOM_WM_ICON_NAME);
     if (s != cap_iconic) {
         bool was_set = !cap_iconic.isEmpty();
         cap_iconic = s;
         if (!cap_suffix.isEmpty()) {
             if (!cap_iconic.isEmpty())  // Keep the same suffix in iconic name if it's set
                 info->setVisibleIconName(QString(s + cap_suffix).toUtf8().constData());
             else if (was_set)
                 info->setVisibleIconName("");
         }
     }
 }
 
 /**
  * \reimp
  */
 QString Client::caption(bool full, bool stripped) const
 {
     QString cap = stripped ? cap_deco : cap_normal;
-    if (full)
+    if (full) {
         cap += cap_suffix;
+        if (unresponsive()) {
+            cap += QLatin1String(" ");
+            cap += i18nc("Application is not responding, appended to window title", "(Not Responding)");
+        }
+    }
     return cap;
 }
 
 bool Client::tabTo(Client *other, bool behind, bool activate)
 {
     Q_ASSERT(other && other != this);
 
     if (tab_group && tab_group == other->tabGroup()) { // special case: move inside group
         tab_group->move(this, other, behind);
         return true;
     }
 
     GeometryUpdatesBlocker blocker(this);
     const bool wasBlocking = signalsBlocked();
     blockSignals(true); // prevent client emitting "retabbed to nowhere" cause it's about to be entabbed the next moment
     untab();
     blockSignals(wasBlocking);
 
     TabGroup *newGroup = other->tabGroup() ? other->tabGroup() : new TabGroup(other);
 
     if (!newGroup->add(this, other, behind, activate)) {
         if (newGroup->count() < 2) { // adding "c" to "to" failed for whatever reason
             newGroup->remove(other);
             delete newGroup;
         }
         return false;
     }
     return true;
 }
 
 bool Client::untab(const QRect &toGeometry, bool clientRemoved)
 {
     TabGroup *group = tab_group;
     if (group && group->remove(this)) { // remove sets the tabgroup to "0", therefore the pointer is cached
         if (group->isEmpty()) {
             delete group;
         }
         if (clientRemoved)
             return true; // there's been a broadcast signal that this client is now removed - don't touch it
         setClientShown(!(isMinimized() || isShade()));
         bool keepSize = toGeometry.size() == size();
         bool changedSize = false;
         if (quickTileMode() != QuickTileNone) {
             changedSize = true;
             setQuickTileMode(QuickTileNone); // if we leave a quicktiled group, assume that the user wants to untile
         }
         if (toGeometry.isValid()) {
             if (maximizeMode() != MaximizeRestore) {
                 changedSize = true;
                 maximize(MaximizeRestore); // explicitly calling for a geometry -> unmaximize
             }
             if (keepSize && changedSize) {
                 geom_restore = geometry(); // checkWorkspacePosition() invokes it
                 QPoint cpoint = Cursor::pos();
                 QPoint point = cpoint;
                 point.setX((point.x() - toGeometry.x()) * geom_restore.width() / toGeometry.width());
                 point.setY((point.y() - toGeometry.y()) * geom_restore.height() / toGeometry.height());
                 geom_restore.moveTo(cpoint-point);
             } else {
                 geom_restore = toGeometry; // checkWorkspacePosition() invokes it
             }
             setGeometry(geom_restore);
             checkWorkspacePosition();
         }
         return true;
     }
     return false;
 }
 
 void Client::setTabGroup(TabGroup *group)
 {
     tab_group = group;
     if (group) {
         unsigned long data[] = {qHash(group)}; //->id();
         m_client.changeProperty(atoms->kde_net_wm_tab_group, XCB_ATOM_CARDINAL, 32, 1, data);
     }
     else
         m_client.deleteProperty(atoms->kde_net_wm_tab_group);
     emit tabGroupChanged();
 }
 
 bool Client::isCurrentTab() const
 {
     return !tab_group || tab_group->current() == this;
 }
 
 void Client::syncTabGroupFor(QString property, bool fromThisClient)
 {
     if (tab_group)
         tab_group->sync(property.toAscii().data(), fromThisClient ? this : tab_group->current());
 }
 
 void Client::setClientShown(bool shown)
 {
     if (deleting)
         return; // Don't change shown status if this client is being deleted
     if (shown != hidden)
         return; // nothing to change
     hidden = !shown;
     if (options->isInactiveTabsSkipTaskbar())
         setSkipTaskbar(hidden); // TODO: Causes reshuffle of the taskbar
     if (shown) {
         map();
         takeFocus();
         autoRaise();
         FocusChain::self()->update(this, FocusChain::MakeFirst);
     } else {
         unmap();
         // Don't move tabs to the end of the list when another tab get's activated
         if (isCurrentTab())
             FocusChain::self()->update(this, FocusChain::MakeLast);
         addWorkspaceRepaint(visibleRect());
     }
 }
 
 void Client::getMotifHints()
 {
     const bool wasClosable = m_motif.close();
     const bool wasNoBorder = m_motif.noBorder();
     if (m_managed) // only on property change, initial read is prefetched
         m_motif.fetch();
     m_motif.read();
     if (m_motif.hasDecoration() && m_motif.noBorder() != wasNoBorder) {
         // If we just got a hint telling us to hide decorations, we do so.
         if (m_motif.noBorder())
             noborder = rules()->checkNoBorder(true);
         // If the Motif hint is now telling us to show decorations, we only do so if the app didn't
         // instruct us to hide decorations in some other way, though.
         else if (!app_noborder)
             noborder = rules()->checkNoBorder(false);
     }
 
     // mminimize; - Ignore, bogus - E.g. shading or sending to another desktop is "minimizing" too
     // mmaximize; - Ignore, bogus - Maximizing is basically just resizing
     const bool closabilityChanged = wasClosable != m_motif.close();
     if (isManaged())
         updateDecoration(true);   // Check if noborder state has changed
     if (closabilityChanged) {
         emit closeableChanged(isCloseable());
     }
 }
 
 void Client::getIcons()
 {
     // First read icons from the window itself
     const QString themedIconName = iconFromDesktopFile();
     if (!themedIconName.isEmpty()) {
         setIcon(QIcon::fromTheme(themedIconName));
         return;
     }
     QIcon icon;
     auto readIcon = [this, &icon](int size, bool scale = true) {
         const QPixmap pix = KWindowSystem::icon(window(), size, size, scale, KWindowSystem::NETWM | KWindowSystem::WMHints, info);
         if (!pix.isNull()) {
             icon.addPixmap(pix);
         }
     };
     readIcon(16);
     readIcon(32);
     readIcon(48, false);
     readIcon(64, false);
     readIcon(128, false);
     if (icon.isNull()) {
         // Then try window group
         icon = group()->icon();
     }
     if (icon.isNull() && isTransient()) {
         // Then mainclients
         auto mainclients = mainClients();
         for (auto it = mainclients.constBegin();
                 it != mainclients.constEnd() && icon.isNull();
                 ++it) {
             if (!(*it)->icon().isNull()) {
                 icon = (*it)->icon();
                 break;
             }
         }
     }
     if (icon.isNull()) {
         // And if nothing else, load icon from classhint or xapp icon
         icon.addPixmap(KWindowSystem::icon(window(),  32,  32,  true, KWindowSystem::ClassHint | KWindowSystem::XApp, info));
         icon.addPixmap(KWindowSystem::icon(window(),  16,  16,  true, KWindowSystem::ClassHint | KWindowSystem::XApp, info));
         icon.addPixmap(KWindowSystem::icon(window(),  64,  64, false, KWindowSystem::ClassHint | KWindowSystem::XApp, info));
         icon.addPixmap(KWindowSystem::icon(window(), 128, 128, false, KWindowSystem::ClassHint | KWindowSystem::XApp, info));
     }
     setIcon(icon);
 }
 
 void Client::getSyncCounter()
 {
     if (!Xcb::Extensions::self()->isSyncAvailable())
         return;
 
     Xcb::Property syncProp(false, window(), atoms->net_wm_sync_request_counter, XCB_ATOM_CARDINAL, 0, 1);
     const xcb_sync_counter_t counter = syncProp.value<xcb_sync_counter_t>(XCB_NONE);
     if (counter != XCB_NONE) {
         syncRequest.counter = counter;
         syncRequest.value.hi = 0;
         syncRequest.value.lo = 0;
         auto *c = connection();
         xcb_sync_set_counter(c, syncRequest.counter, syncRequest.value);
         if (syncRequest.alarm == XCB_NONE) {
             const uint32_t mask = XCB_SYNC_CA_COUNTER | XCB_SYNC_CA_VALUE_TYPE | XCB_SYNC_CA_TEST_TYPE | XCB_SYNC_CA_EVENTS;
             const uint32_t values[] = {
                 syncRequest.counter,
                 XCB_SYNC_VALUETYPE_RELATIVE,
                 XCB_SYNC_TESTTYPE_POSITIVE_TRANSITION,
                 1
             };
             syncRequest.alarm = xcb_generate_id(c);
             auto cookie = xcb_sync_create_alarm_checked(c, syncRequest.alarm, mask, values);
             ScopedCPointer<xcb_generic_error_t> error(xcb_request_check(c, cookie));
             if (!error.isNull()) {
                 syncRequest.alarm = XCB_NONE;
             } else {
                 xcb_sync_change_alarm_value_list_t value;
                 memset(&value, 0, sizeof(value));
                 value.value.hi = 0;
                 value.value.lo = 1;
                 value.delta.hi = 0;
                 value.delta.lo = 1;
                 xcb_sync_change_alarm_aux(c, syncRequest.alarm, XCB_SYNC_CA_DELTA | XCB_SYNC_CA_VALUE, &value);
             }
         }
     }
 }
 
 /**
  * Send the client a _NET_SYNC_REQUEST
  */
 void Client::sendSyncRequest()
 {
     if (syncRequest.counter == XCB_NONE || syncRequest.isPending)
         return; // do NOT, NEVER send a sync request when there's one on the stack. the clients will just stop respoding. FOREVER! ...
 
     if (!syncRequest.failsafeTimeout) {
         syncRequest.failsafeTimeout = new QTimer(this);
         connect(syncRequest.failsafeTimeout, &QTimer::timeout, this,
             [this]() {
                 // client does not respond to XSYNC requests in reasonable time, remove support
                 if (!ready_for_painting) {
                     // failed on initial pre-show request
                     setReadyForPainting();
                     setupWindowManagementInterface();
                     return;
                 }
                 // failed during resize
                 syncRequest.isPending = false;
                 syncRequest.counter = syncRequest.alarm = XCB_NONE;
                 delete syncRequest.timeout; delete syncRequest.failsafeTimeout;
                 syncRequest.timeout = syncRequest.failsafeTimeout = nullptr;
                 syncRequest.lastTimestamp = XCB_CURRENT_TIME;
             }
         );
         syncRequest.failsafeTimeout->setSingleShot(true);
     }
     // if there's no response within 10 seconds, sth. went wrong and we remove XSYNC support from this client.
     // see events.cpp Client::syncEvent()
     syncRequest.failsafeTimeout->start(ready_for_painting ? 10000 : 1000);
 
     // We increment before the notify so that after the notify
     // syncCounterSerial will equal the value we are expecting
     // in the acknowledgement
     const uint32_t oldLo = syncRequest.value.lo;
     syncRequest.value.lo++;;
     if (oldLo > syncRequest.value.lo) {
         syncRequest.value.hi++;
     }
     if (syncRequest.lastTimestamp >= xTime()) {
         updateXTime();
     }
 
     // Send the message to client
     sendClientMessage(window(), atoms->wm_protocols, atoms->net_wm_sync_request, syncRequest.value.lo, syncRequest.value.hi);
     syncRequest.isPending = true;
     syncRequest.lastTimestamp = xTime();
 }
 
 bool Client::wantsInput() const
 {
     return rules()->checkAcceptFocus(acceptsFocus() || info->supportsProtocol(NET::TakeFocusProtocol));
 }
 
 bool Client::acceptsFocus() const
 {
     return info->input();
 }
 
 void Client::setBlockingCompositing(bool block)
 {
     const bool usedToBlock = blocks_compositing;
     blocks_compositing = rules()->checkBlockCompositing(block && options->windowsBlockCompositing());
     if (usedToBlock != blocks_compositing) {
         emit blockingCompositingChanged(blocks_compositing ? this : 0);
     }
 }
 
 void Client::updateAllowedActions(bool force)
 {
     if (!isManaged() && !force)
         return;
     NET::Actions old_allowed_actions = NET::Actions(allowed_actions);
     allowed_actions = 0;
     if (isMovable())
         allowed_actions |= NET::ActionMove;
     if (isResizable())
         allowed_actions |= NET::ActionResize;
     if (isMinimizable())
         allowed_actions |= NET::ActionMinimize;
     if (isShadeable())
         allowed_actions |= NET::ActionShade;
     // Sticky state not supported
     if (isMaximizable())
         allowed_actions |= NET::ActionMax;
     if (userCanSetFullScreen())
         allowed_actions |= NET::ActionFullScreen;
     allowed_actions |= NET::ActionChangeDesktop; // Always (Pagers shouldn't show Docks etc.)
     if (isCloseable())
         allowed_actions |= NET::ActionClose;
     if (old_allowed_actions == allowed_actions)
         return;
     // TODO: This could be delayed and compressed - It's only for pagers etc. anyway
     info->setAllowedActions(allowed_actions);
 
     // ONLY if relevant features have changed (and the window didn't just get/loose moveresize for maximization state changes)
     const NET::Actions relevant = ~(NET::ActionMove|NET::ActionResize);
     if ((allowed_actions & relevant) != (old_allowed_actions & relevant)) {
         if ((allowed_actions & NET::ActionMinimize) != (old_allowed_actions & NET::ActionMinimize)) {
             emit minimizeableChanged(allowed_actions & NET::ActionMinimize);
         }
         if ((allowed_actions & NET::ActionShade) != (old_allowed_actions & NET::ActionShade)) {
             emit shadeableChanged(allowed_actions & NET::ActionShade);
         }
         if ((allowed_actions & NET::ActionMax) != (old_allowed_actions & NET::ActionMax)) {
             emit maximizeableChanged(allowed_actions & NET::ActionMax);
         }
     }
 }
 
 void Client::debug(QDebug& stream) const
 {
     print<QDebug>(stream);
 }
 
 Xcb::StringProperty Client::fetchActivities() const
 {
 #ifdef KWIN_BUILD_ACTIVITIES
     return Xcb::StringProperty(window(), atoms->activities);
 #else
     return Xcb::StringProperty();
 #endif
 }
 
 void Client::readActivities(Xcb::StringProperty &property)
 {
 #ifdef KWIN_BUILD_ACTIVITIES
     QStringList newActivitiesList;
     QString prop = QString::fromUtf8(property);
     activitiesDefined = !prop.isEmpty();
 
     if (prop == Activities::nullUuid()) {
         //copied from setOnAllActivities to avoid a redundant XChangeProperty.
         if (!activityList.isEmpty()) {
             activityList.clear();
             updateActivities(true);
         }
         return;
     }
     if (prop.isEmpty()) {
         //note: this makes it *act* like it's on all activities but doesn't set the property to 'ALL'
         if (!activityList.isEmpty()) {
             activityList.clear();
             updateActivities(true);
         }
         return;
     }
 
     newActivitiesList = prop.split(u',');
 
     if (newActivitiesList == activityList)
         return; //expected change, it's ok.
 
     //otherwise, somebody else changed it. we need to validate before reacting.
     //if the activities are not synced, and there are existing clients with
     //activities specified, somebody has restarted kwin. we can not validate
     //activities in this case. we need to trust the old values.
     if (Activities::self() && Activities::self()->serviceStatus() != KActivities::Consumer::Unknown) {
         QStringList allActivities = Activities::self()->all();
         if (allActivities.isEmpty()) {
             qCDebug(KWIN_CORE) << "no activities!?!?";
             //don't touch anything, there's probably something bad going on and we don't wanna make it worse
             return;
         }
 
 
         for (int i = 0; i < newActivitiesList.size(); ++i) {
             if (! allActivities.contains(newActivitiesList.at(i))) {
                 qCDebug(KWIN_CORE) << "invalid:" << newActivitiesList.at(i);
                 newActivitiesList.removeAt(i--);
             }
         }
     }
     setOnActivities(newActivitiesList);
 #else
     Q_UNUSED(property)
 #endif
 }
 
 void Client::checkActivities()
 {
 #ifdef KWIN_BUILD_ACTIVITIES
     Xcb::StringProperty property = fetchActivities();
     readActivities(property);
 #endif
 }
 
 void Client::setSessionInteract(bool needed)
 {
     needsSessionInteract = needed;
 }
 
 QRect Client::decorationRect() const
 {
     return QRect(0, 0, width(), height());
 }
 
 Xcb::Property Client::fetchFirstInTabBox() const
 {
     return Xcb::Property(false, m_client, atoms->kde_first_in_window_list,
                          atoms->kde_first_in_window_list, 0, 1);
 }
 
 void Client::readFirstInTabBox(Xcb::Property &property)
 {
     setFirstInTabBox(property.toBool(32, atoms->kde_first_in_window_list));
 }
 
 void Client::updateFirstInTabBox()
 {
     // TODO: move into KWindowInfo
     Xcb::Property property = fetchFirstInTabBox();
     readFirstInTabBox(property);
 }
 
 Xcb::StringProperty Client::fetchColorScheme() const
 {
     return Xcb::StringProperty(m_client, atoms->kde_color_sheme);
 }
 
 void Client::readColorScheme(Xcb::StringProperty &property)
 {
     AbstractClient::updateColorScheme(rules()->checkDecoColor(QString::fromUtf8(property)));
 }
 
 void Client::updateColorScheme()
 {
     Xcb::StringProperty property = fetchColorScheme();
     readColorScheme(property);
 }
 
 bool Client::isClient() const
 {
     return true;
 }
 
 NET::WindowType Client::windowType(bool direct, int supportedTypes) const
 {
     // TODO: does it make sense to cache the returned window type for SUPPORTED_MANAGED_WINDOW_TYPES_MASK?
     if (supportedTypes == 0) {
         supportedTypes = SUPPORTED_MANAGED_WINDOW_TYPES_MASK;
     }
     NET::WindowType wt = info->windowType(NET::WindowTypes(supportedTypes));
     if (direct) {
         return wt;
     }
     NET::WindowType wt2 = client_rules.checkType(wt);
     if (wt != wt2) {
         wt = wt2;
         info->setWindowType(wt);   // force hint change
     }
     // hacks here
     if (wt == NET::Unknown)   // this is more or less suggested in NETWM spec
         wt = isTransient() ? NET::Dialog : NET::Normal;
     return wt;
 }
 
 void Client::cancelFocusOutTimer()
 {
     if (m_focusOutTimer) {
         m_focusOutTimer->stop();
     }
 }
 
 xcb_window_t Client::frameId() const
 {
     return m_frame;
 }
 
 Xcb::Property Client::fetchShowOnScreenEdge() const
 {
     return Xcb::Property(false, window(), atoms->kde_screen_edge_show, XCB_ATOM_CARDINAL, 0, 1);
 }
 
 void Client::readShowOnScreenEdge(Xcb::Property &property)
 {
     //value comes in two parts, edge in the lower byte
     //then the type in the upper byte
     // 0 = autohide
     // 1 = raise in front on activate
 
     const uint32_t value = property.value<uint32_t>(ElectricNone);
     ElectricBorder border = ElectricNone;
     switch (value & 0xFF) {
     case 0:
         border = ElectricTop;
         break;
     case 1:
         border = ElectricRight;
         break;
     case 2:
         border = ElectricBottom;
         break;
     case 3:
         border = ElectricLeft;
         break;
     }
     if (border != ElectricNone) {
         disconnect(m_edgeRemoveConnection);
         disconnect(m_edgeGeometryTrackingConnection);
         bool successfullyHidden = false;
 
         if (((value >> 8) & 0xFF) == 1) {
             setKeepBelow(true);
             successfullyHidden = keepBelow(); //request could have failed due to user kwin rules
 
             m_edgeRemoveConnection = connect(this, &AbstractClient::keepBelowChanged, this, [this](){
                 if (!keepBelow()) {
                     ScreenEdges::self()->reserve(this, ElectricNone);
                 }
             });
         } else {
             hideClient(true);
             successfullyHidden = isHiddenInternal();
 
             m_edgeGeometryTrackingConnection = connect(this, &Client::geometryChanged, this, [this, border](){
                 hideClient(true);
                 ScreenEdges::self()->reserve(this, border);
             });
         }
 
         if (successfullyHidden) {
             ScreenEdges::self()->reserve(this, border);
         } else {
             ScreenEdges::self()->reserve(this, ElectricNone);
         }
     } else if (!property.isNull() && property->type != XCB_ATOM_NONE) {
         // property value is incorrect, delete the property
         // so that the client knows that it is not hidden
         xcb_delete_property(connection(), window(), atoms->kde_screen_edge_show);
     } else {
         // restore
         // TODO: add proper unreserve
 
         //this will call showOnScreenEdge to reset the state
         disconnect(m_edgeGeometryTrackingConnection);
         ScreenEdges::self()->reserve(this, ElectricNone);
     }
 }
 
 void Client::updateShowOnScreenEdge()
 {
     Xcb::Property property = fetchShowOnScreenEdge();
     readShowOnScreenEdge(property);
 }
 
 void Client::showOnScreenEdge()
 {
     disconnect(m_edgeRemoveConnection);
 
     hideClient(false);
     setKeepBelow(false);
     xcb_delete_property(connection(), window(), atoms->kde_screen_edge_show);
 }
 
 void Client::addDamage(const QRegion &damage)
 {
     if (!ready_for_painting) { // avoid "setReadyForPainting()" function calling overhead
         if (syncRequest.counter == XCB_NONE) {  // cannot detect complete redraw, consider done now
             setReadyForPainting();
             setupWindowManagementInterface();
         }
     }
     repaints_region += damage;
     Toplevel::addDamage(damage);
 }
 
 bool Client::belongsToSameApplication(const AbstractClient *other, bool active_hack) const
 {
     const Client *c2 = dynamic_cast<const Client*>(other);
     if (!c2) {
         return false;
     }
     return Client::belongToSameApplication(this, c2, active_hack);
 }
 
 void Client::updateTabGroupStates(TabGroup::States states)
 {
     if (auto t = tabGroup()) {
         t->updateStates(this, states);
     }
 }
 
 QSize Client::resizeIncrements() const
 {
     return m_geometryHints.resizeIncrements();
 }
 
 Xcb::StringProperty Client::fetchApplicationMenuServiceName() const
 {
     return Xcb::StringProperty(m_client, atoms->kde_net_wm_appmenu_service_name);
 }
 
 void Client::readApplicationMenuServiceName(Xcb::StringProperty &property)
 {
     updateApplicationMenuServiceName(QString::fromUtf8(property));
 }
 
 void Client::checkApplicationMenuServiceName()
 {
     Xcb::StringProperty property = fetchApplicationMenuServiceName();
     readApplicationMenuServiceName(property);
 }
 
 Xcb::StringProperty Client::fetchApplicationMenuObjectPath() const
 {
     return Xcb::StringProperty(m_client, atoms->kde_net_wm_appmenu_object_path);
 }
 
 void Client::readApplicationMenuObjectPath(Xcb::StringProperty &property)
 {
     updateApplicationMenuObjectPath(QString::fromUtf8(property));
 }
 
 void Client::checkApplicationMenuObjectPath()
 {
     Xcb::StringProperty property = fetchApplicationMenuObjectPath();
     readApplicationMenuObjectPath(property);
 }
 
 } // namespace
 
diff --git a/effects.cpp b/effects.cpp
index 25b706e37..1323f4dfc 100644
--- a/effects.cpp
+++ b/effects.cpp
@@ -1,2073 +1,2078 @@
 /********************************************************************
  KWin - the KDE window manager
  This file is part of the KDE project.
 
 Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
 Copyright (C) 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 
 #include "effects.h"
 
 #include "effectsadaptor.h"
 #include "effectloader.h"
 #ifdef KWIN_BUILD_ACTIVITIES
 #include "activities.h"
 #endif
 #include "deleted.h"
 #include "client.h"
 #include "cursor.h"
 #include "group.h"
 #include "osd.h"
 #include "pointer_input.h"
 #include "scene_xrender.h"
 #include "scene_qpainter.h"
 #include "unmanaged.h"
 #ifdef KWIN_BUILD_TABBOX
 #include "tabbox.h"
 #endif
 #include "screenedge.h"
 #include "scripting/scriptedeffect.h"
 #include "screens.h"
 #include "screenlockerwatcher.h"
 #include "thumbnailitem.h"
 #include "virtualdesktops.h"
 #include "workspace.h"
 #include "kwinglutils.h"
 
 #include <QDebug>
 
 #include <Plasma/Theme>
 
 #include <assert.h>
 #include "composite.h"
 #include "xcbutils.h"
 #include "platform.h"
 #include "shell_client.h"
 #include "wayland_server.h"
 
 #include "decorations/decorationbridge.h"
 #include <KDecoration2/DecorationSettings>
 
 namespace KWin
 {
 //---------------------
 // Static
 
 static QByteArray readWindowProperty(xcb_window_t win, xcb_atom_t atom, xcb_atom_t type, int format)
 {
     if (win == XCB_WINDOW_NONE) {
         return QByteArray();
     }
     uint32_t len = 32768;
     for (;;) {
         Xcb::Property prop(false, win, atom, XCB_ATOM_ANY, 0, len);
         if (prop.isNull()) {
             // get property failed
             return QByteArray();
         }
         if (prop->bytes_after > 0) {
             len *= 2;
             continue;
         }
         return prop.toByteArray(format, type);
     }
 }
 
 static void deleteWindowProperty(Window win, long int atom)
 {
     if (win == XCB_WINDOW_NONE) {
         return;
     }
     xcb_delete_property(connection(), win, atom);
 }
 
 //---------------------
 
 EffectsHandlerImpl::EffectsHandlerImpl(Compositor *compositor, Scene *scene)
     : EffectsHandler(scene->compositingType())
     , keyboard_grab_effect(NULL)
     , fullscreen_effect(0)
     , next_window_quad_type(EFFECT_QUAD_TYPE_START)
     , m_compositor(compositor)
     , m_scene(scene)
     , m_desktopRendering(false)
     , m_currentRenderedDesktop(0)
     , m_effectLoader(new EffectLoader(this))
     , m_trackingCursorChanges(0)
 {
     qRegisterMetaType<QVector<KWin::EffectWindow*>>();
     connect(m_effectLoader, &AbstractEffectLoader::effectLoaded, this,
         [this](Effect *effect, const QString &name) {
             effect_order.insert(effect->requestedEffectChainPosition(), EffectPair(name, effect));
             loaded_effects << EffectPair(name, effect);
             effectsChanged();
         }
     );
     m_effectLoader->setConfig(kwinApp()->config());
     new EffectsAdaptor(this);
     QDBusConnection dbus = QDBusConnection::sessionBus();
     dbus.registerObject(QStringLiteral("/Effects"), this);
     // init is important, otherwise causes crashes when quads are build before the first painting pass start
     m_currentBuildQuadsIterator = m_activeEffects.constEnd();
 
     Workspace *ws = Workspace::self();
     VirtualDesktopManager *vds = VirtualDesktopManager::self();
     connect(ws, &Workspace::showingDesktopChanged,
             this, &EffectsHandlerImpl::showingDesktopChanged);
     connect(ws, &Workspace::currentDesktopChanged, this,
         [this](int old, AbstractClient *c) {
             const int newDesktop = VirtualDesktopManager::self()->current();
             if (old != 0 && newDesktop != old) {
                 emit desktopChanged(old, newDesktop, c ? c->effectWindow() : 0);
                 // TODO: remove in 4.10
                 emit desktopChanged(old, newDesktop);
             }
         }
     );
     connect(ws, &Workspace::desktopPresenceChanged, this,
         [this](AbstractClient *c, int old) {
             if (!c->effectWindow()) {
                 return;
             }
             emit desktopPresenceChanged(c->effectWindow(), old, c->desktop());
         }
     );
     connect(ws, &Workspace::clientAdded, this,
         [this](Client *c) {
             if (c->readyForPainting())
                 slotClientShown(c);
             else
                 connect(c, &Toplevel::windowShown, this, &EffectsHandlerImpl::slotClientShown);
         }
     );
     connect(ws, &Workspace::unmanagedAdded, this,
         [this](Unmanaged *u) {
             // it's never initially ready but has synthetic 50ms delay
             connect(u, &Toplevel::windowShown, this, &EffectsHandlerImpl::slotUnmanagedShown);
         }
     );
     connect(ws, &Workspace::clientActivated, this,
         [this](KWin::AbstractClient *c) {
             emit windowActivated(c ? c->effectWindow() : nullptr);
         }
     );
     connect(ws, &Workspace::deletedRemoved, this,
         [this](KWin::Deleted *d) {
             emit windowDeleted(d->effectWindow());
             elevated_windows.removeAll(d->effectWindow());
         }
     );
     connect(vds, &VirtualDesktopManager::countChanged, this, &EffectsHandler::numberDesktopsChanged);
     connect(Cursor::self(), &Cursor::mouseChanged, this, &EffectsHandler::mouseChanged);
     connect(ws, &Workspace::propertyNotify, this,
         [this](long int atom) {
             if (!registered_atoms.contains(atom))
                 return;
             emit propertyNotify(nullptr, atom);
         }
     );
     connect(screens(), &Screens::countChanged,    this, &EffectsHandler::numberScreensChanged);
     connect(screens(), &Screens::sizeChanged,     this, &EffectsHandler::virtualScreenSizeChanged);
     connect(screens(), &Screens::geometryChanged, this, &EffectsHandler::virtualScreenGeometryChanged);
 #ifdef KWIN_BUILD_ACTIVITIES
     if (Activities *activities = Activities::self()) {
         connect(activities, &Activities::added,          this, &EffectsHandler::activityAdded);
         connect(activities, &Activities::removed,        this, &EffectsHandler::activityRemoved);
         connect(activities, &Activities::currentChanged, this, &EffectsHandler::currentActivityChanged);
     }
 #endif
     connect(ws, &Workspace::stackingOrderChanged, this, &EffectsHandler::stackingOrderChanged);
 #ifdef KWIN_BUILD_TABBOX
     TabBox::TabBox *tabBox = TabBox::TabBox::self();
     connect(tabBox, &TabBox::TabBox::tabBoxAdded,    this, &EffectsHandler::tabBoxAdded);
     connect(tabBox, &TabBox::TabBox::tabBoxUpdated,  this, &EffectsHandler::tabBoxUpdated);
     connect(tabBox, &TabBox::TabBox::tabBoxClosed,   this, &EffectsHandler::tabBoxClosed);
     connect(tabBox, &TabBox::TabBox::tabBoxKeyEvent, this, &EffectsHandler::tabBoxKeyEvent);
 #endif
     connect(ScreenEdges::self(), &ScreenEdges::approaching, this, &EffectsHandler::screenEdgeApproaching);
     connect(ScreenLockerWatcher::self(), &ScreenLockerWatcher::locked, this, &EffectsHandler::screenLockingChanged);
     // connect all clients
     for (Client *c : ws->clientList()) {
         setupClientConnections(c);
     }
     for (Unmanaged *u : ws->unmanagedList()) {
         setupUnmanagedConnections(u);
     }
     if (auto w = waylandServer()) {
         connect(w, &WaylandServer::shellClientAdded, this,
             [this](ShellClient *c) {
                 if (c->readyForPainting())
                     slotShellClientShown(c);
                 else
                     connect(c, &Toplevel::windowShown, this, &EffectsHandlerImpl::slotShellClientShown);
             }
         );
     }
     reconfigure();
 }
 
 EffectsHandlerImpl::~EffectsHandlerImpl()
 {
     unloadAllEffects();
 }
 
 void EffectsHandlerImpl::unloadAllEffects()
 {
     makeOpenGLContextCurrent();
     if (keyboard_grab_effect != NULL)
         ungrabKeyboard();
     setActiveFullScreenEffect(nullptr);
     for (auto it = loaded_effects.begin(); it != loaded_effects.end(); ++it) {
         Effect *effect = (*it).second;
         stopMouseInterception(effect);
         // remove support properties for the effect
         const QList<QByteArray> properties = m_propertiesForEffects.keys();
         for (const QByteArray &property : properties) {
             removeSupportProperty(property, effect);
         }
         delete effect;
     }
     loaded_effects.clear();
     m_effectLoader->clear();
 }
 
 void EffectsHandlerImpl::setupAbstractClientConnections(AbstractClient* c)
 {
     connect(c, &AbstractClient::windowClosed, this, &EffectsHandlerImpl::slotWindowClosed);
     connect(c, static_cast<void (AbstractClient::*)(KWin::AbstractClient*, MaximizeMode)>(&AbstractClient::clientMaximizedStateChanged),
             this, &EffectsHandlerImpl::slotClientMaximized);
     connect(c, &AbstractClient::clientStartUserMovedResized, this,
         [this](AbstractClient *c) {
             emit windowStartUserMovedResized(c->effectWindow());
         }
     );
     connect(c, &AbstractClient::clientStepUserMovedResized, this,
         [this](AbstractClient *c, const QRect &geometry) {
             emit windowStepUserMovedResized(c->effectWindow(), geometry);
         }
     );
     connect(c, &AbstractClient::clientFinishUserMovedResized, this,
         [this](AbstractClient *c) {
             emit windowFinishUserMovedResized(c->effectWindow());
         }
     );
     connect(c, &AbstractClient::opacityChanged, this, &EffectsHandlerImpl::slotOpacityChanged);
     connect(c, &AbstractClient::clientMinimized, this,
         [this](AbstractClient *c, bool animate) {
             // TODO: notify effects even if it should not animate?
             if (animate) {
                 emit windowMinimized(c->effectWindow());
             }
         }
     );
     connect(c, &AbstractClient::clientUnminimized, this,
         [this](AbstractClient* c, bool animate) {
             // TODO: notify effects even if it should not animate?
             if (animate) {
                 emit windowUnminimized(c->effectWindow());
             }
         }
     );
     connect(c, &AbstractClient::modalChanged,         this, &EffectsHandlerImpl::slotClientModalityChanged);
     connect(c, &AbstractClient::geometryShapeChanged, this, &EffectsHandlerImpl::slotGeometryShapeChanged);
     connect(c, &AbstractClient::damaged,              this, &EffectsHandlerImpl::slotWindowDamaged);
+    connect(c, &AbstractClient::unresponsiveChanged, this,
+        [this, c](bool unresponsive) {
+            emit windowUnresponsiveChanged(c->effectWindow(), unresponsive);
+        }
+    );
     connect(c, &AbstractClient::windowShown, this,
         [this](Toplevel *c) {
             emit windowShown(c->effectWindow());
         }
     );
     connect(c, &AbstractClient::windowHidden, this,
         [this](Toplevel *c) {
             emit windowHidden(c->effectWindow());
         }
     );
 }
 
 void EffectsHandlerImpl::setupClientConnections(Client* c)
 {
     setupAbstractClientConnections(c);
     connect(c, &Client::paddingChanged,       this, &EffectsHandlerImpl::slotPaddingChanged);
     connect(c, &Client::propertyNotify,       this, &EffectsHandlerImpl::slotPropertyNotify);
 }
 
 void EffectsHandlerImpl::setupUnmanagedConnections(Unmanaged* u)
 {
     connect(u, &Unmanaged::windowClosed,         this, &EffectsHandlerImpl::slotWindowClosed);
     connect(u, &Unmanaged::opacityChanged,       this, &EffectsHandlerImpl::slotOpacityChanged);
     connect(u, &Unmanaged::geometryShapeChanged, this, &EffectsHandlerImpl::slotGeometryShapeChanged);
     connect(u, &Unmanaged::paddingChanged,       this, &EffectsHandlerImpl::slotPaddingChanged);
     connect(u, &Unmanaged::damaged,              this, &EffectsHandlerImpl::slotWindowDamaged);
     connect(u, &Unmanaged::propertyNotify,       this, &EffectsHandlerImpl::slotPropertyNotify);
 }
 
 void EffectsHandlerImpl::reconfigure()
 {
     m_effectLoader->queryAndLoadAll();
 }
 
 // the idea is that effects call this function again which calls the next one
 void EffectsHandlerImpl::prePaintScreen(ScreenPrePaintData& data, int time)
 {
     if (m_currentPaintScreenIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintScreenIterator++)->prePaintScreen(data, time);
         --m_currentPaintScreenIterator;
     }
     // no special final code
 }
 
 void EffectsHandlerImpl::paintScreen(int mask, QRegion region, ScreenPaintData& data)
 {
     if (m_currentPaintScreenIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintScreenIterator++)->paintScreen(mask, region, data);
         --m_currentPaintScreenIterator;
     } else
         m_scene->finalPaintScreen(mask, region, data);
 }
 
 void EffectsHandlerImpl::paintDesktop(int desktop, int mask, QRegion region, ScreenPaintData &data)
 {
     if (desktop < 1 || desktop > numberOfDesktops()) {
         return;
     }
     m_currentRenderedDesktop = desktop;
     m_desktopRendering = true;
     // save the paint screen iterator
     EffectsIterator savedIterator = m_currentPaintScreenIterator;
     m_currentPaintScreenIterator = m_activeEffects.constBegin();
     effects->paintScreen(mask, region, data);
     // restore the saved iterator
     m_currentPaintScreenIterator = savedIterator;
     m_desktopRendering = false;
 }
 
 void EffectsHandlerImpl::postPaintScreen()
 {
     if (m_currentPaintScreenIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintScreenIterator++)->postPaintScreen();
         --m_currentPaintScreenIterator;
     }
     // no special final code
 }
 
 void EffectsHandlerImpl::prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time)
 {
     if (m_currentPaintWindowIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintWindowIterator++)->prePaintWindow(w, data, time);
         --m_currentPaintWindowIterator;
     }
     // no special final code
 }
 
 void EffectsHandlerImpl::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
 {
     if (m_currentPaintWindowIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintWindowIterator++)->paintWindow(w, mask, region, data);
         --m_currentPaintWindowIterator;
     } else
         m_scene->finalPaintWindow(static_cast<EffectWindowImpl*>(w), mask, region, data);
 }
 
 void EffectsHandlerImpl::paintEffectFrame(EffectFrame* frame, QRegion region, double opacity, double frameOpacity)
 {
     if (m_currentPaintEffectFrameIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintEffectFrameIterator++)->paintEffectFrame(frame, region, opacity, frameOpacity);
         --m_currentPaintEffectFrameIterator;
     } else {
         const EffectFrameImpl* frameImpl = static_cast<const EffectFrameImpl*>(frame);
         frameImpl->finalRender(region, opacity, frameOpacity);
     }
 }
 
 void EffectsHandlerImpl::postPaintWindow(EffectWindow* w)
 {
     if (m_currentPaintWindowIterator != m_activeEffects.constEnd()) {
         (*m_currentPaintWindowIterator++)->postPaintWindow(w);
         --m_currentPaintWindowIterator;
     }
     // no special final code
 }
 
 Effect *EffectsHandlerImpl::provides(Effect::Feature ef)
 {
     for (int i = 0; i < loaded_effects.size(); ++i)
         if (loaded_effects.at(i).second->provides(ef))
             return loaded_effects.at(i).second;
     return NULL;
 }
 
 void EffectsHandlerImpl::drawWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
 {
     if (m_currentDrawWindowIterator != m_activeEffects.constEnd()) {
         (*m_currentDrawWindowIterator++)->drawWindow(w, mask, region, data);
         --m_currentDrawWindowIterator;
     } else
         m_scene->finalDrawWindow(static_cast<EffectWindowImpl*>(w), mask, region, data);
 }
 
 void EffectsHandlerImpl::buildQuads(EffectWindow* w, WindowQuadList& quadList)
 {
     static bool initIterator = true;
     if (initIterator) {
         m_currentBuildQuadsIterator = m_activeEffects.constBegin();
         initIterator = false;
     }
     if (m_currentBuildQuadsIterator != m_activeEffects.constEnd()) {
         (*m_currentBuildQuadsIterator++)->buildQuads(w, quadList);
         --m_currentBuildQuadsIterator;
     }
     if (m_currentBuildQuadsIterator == m_activeEffects.constBegin())
         initIterator = true;
 }
 
 bool EffectsHandlerImpl::hasDecorationShadows() const
 {
     return false;
 }
 
 bool EffectsHandlerImpl::decorationsHaveAlpha() const
 {
     return true;
 }
 
 bool EffectsHandlerImpl::decorationSupportsBlurBehind() const
 {
     return Decoration::DecorationBridge::self()->needsBlur();
 }
 
 // start another painting pass
 void EffectsHandlerImpl::startPaint()
 {
     m_activeEffects.clear();
     m_activeEffects.reserve(loaded_effects.count());
     for(QVector< KWin::EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if (it->second->isActive()) {
             m_activeEffects << it->second;
         }
     }
     m_currentDrawWindowIterator = m_activeEffects.constBegin();
     m_currentPaintWindowIterator = m_activeEffects.constBegin();
     m_currentPaintScreenIterator = m_activeEffects.constBegin();
     m_currentPaintEffectFrameIterator = m_activeEffects.constBegin();
 }
 
 void EffectsHandlerImpl::slotClientMaximized(KWin::AbstractClient *c, MaximizeMode maxMode)
 {
     bool horizontal = false;
     bool vertical = false;
     switch (maxMode) {
     case MaximizeHorizontal:
         horizontal = true;
         break;
     case MaximizeVertical:
         vertical = true;
         break;
     case MaximizeFull:
         horizontal = true;
         vertical = true;
         break;
     case MaximizeRestore: // fall through
     default:
         // default - nothing to do
         break;
     }
     if (EffectWindowImpl *w = c->effectWindow()) {
         emit windowMaximizedStateChanged(w, horizontal, vertical);
     }
 }
 
 void EffectsHandlerImpl::slotOpacityChanged(Toplevel *t, qreal oldOpacity)
 {
     if (t->opacity() == oldOpacity || !t->effectWindow()) {
         return;
     }
     emit windowOpacityChanged(t->effectWindow(), oldOpacity, (qreal)t->opacity());
 }
 
 void EffectsHandlerImpl::slotClientShown(KWin::Toplevel *t)
 {
     Q_ASSERT(dynamic_cast<Client*>(t));
     Client *c = static_cast<Client*>(t);
     disconnect(c, &Toplevel::windowShown, this, &EffectsHandlerImpl::slotClientShown);
     setupClientConnections(c);
     if (!c->tabGroup()) // the "window" has already been there
         emit windowAdded(c->effectWindow());
 }
 
 void EffectsHandlerImpl::slotShellClientShown(Toplevel *t)
 {
     ShellClient *c = static_cast<ShellClient*>(t);
     setupAbstractClientConnections(c);
     emit windowAdded(t->effectWindow());
 }
 
 void EffectsHandlerImpl::slotUnmanagedShown(KWin::Toplevel *t)
 {   // regardless, unmanaged windows are -yet?- not synced anyway
     Q_ASSERT(dynamic_cast<Unmanaged*>(t));
     Unmanaged *u = static_cast<Unmanaged*>(t);
     setupUnmanagedConnections(u);
     emit windowAdded(u->effectWindow());
 }
 
 void EffectsHandlerImpl::slotWindowClosed(KWin::Toplevel *c, KWin::Deleted *d)
 {
     c->disconnect(this);
     if (d) {
         emit windowClosed(c->effectWindow());
     }
 }
 
 void EffectsHandlerImpl::slotClientModalityChanged()
 {
     emit windowModalityChanged(static_cast<Client*>(sender())->effectWindow());
 }
 
 void EffectsHandlerImpl::slotCurrentTabAboutToChange(EffectWindow *from, EffectWindow *to)
 {
     emit currentTabAboutToChange(from, to);
 }
 
 void EffectsHandlerImpl::slotTabAdded(EffectWindow* w, EffectWindow* to)
 {
     emit tabAdded(w, to);
 }
 
 void EffectsHandlerImpl::slotTabRemoved(EffectWindow *w, EffectWindow* leaderOfFormerGroup)
 {
     emit tabRemoved(w, leaderOfFormerGroup);
 }
 
 void EffectsHandlerImpl::slotWindowDamaged(Toplevel* t, const QRect& r)
 {
     if (!t->effectWindow()) {
         // can happen during tear down of window
         return;
     }
     emit windowDamaged(t->effectWindow(), r);
 }
 
 void EffectsHandlerImpl::slotGeometryShapeChanged(Toplevel* t, const QRect& old)
 {
     // during late cleanup effectWindow() may be already NULL
     // in some functions that may still call this
     if (t == NULL || t->effectWindow() == NULL)
         return;
     emit windowGeometryShapeChanged(t->effectWindow(), old);
 }
 
 void EffectsHandlerImpl::slotPaddingChanged(Toplevel* t, const QRect& old)
 {
     // during late cleanup effectWindow() may be already NULL
     // in some functions that may still call this
     if (t == NULL || t->effectWindow() == NULL)
         return;
     emit windowPaddingChanged(t->effectWindow(), old);
 }
 
 void EffectsHandlerImpl::setActiveFullScreenEffect(Effect* e)
 {
     fullscreen_effect = e;
 }
 
 Effect* EffectsHandlerImpl::activeFullScreenEffect() const
 {
     return fullscreen_effect;
 }
 
 bool EffectsHandlerImpl::grabKeyboard(Effect* effect)
 {
     if (keyboard_grab_effect != NULL)
         return false;
     if (kwinApp()->operationMode() == Application::OperationModeX11) {
         bool ret = grabXKeyboard();
         if (!ret)
             return false;
     }
     keyboard_grab_effect = effect;
     return true;
 }
 
 void EffectsHandlerImpl::ungrabKeyboard()
 {
     assert(keyboard_grab_effect != NULL);
     if (kwinApp()->operationMode() == Application::OperationModeX11) {
         ungrabXKeyboard();
     }
     keyboard_grab_effect = NULL;
 }
 
 void EffectsHandlerImpl::grabbedKeyboardEvent(QKeyEvent* e)
 {
     if (keyboard_grab_effect != NULL)
         keyboard_grab_effect->grabbedKeyboardEvent(e);
 }
 
 void EffectsHandlerImpl::startMouseInterception(Effect *effect, Qt::CursorShape shape)
 {
     if (m_grabbedMouseEffects.contains(effect)) {
         return;
     }
     m_grabbedMouseEffects.append(effect);
     if (m_grabbedMouseEffects.size() != 1) {
         return;
     }
     if (kwinApp()->operationMode() != Application::OperationModeX11) {
         input()->pointer()->setEffectsOverrideCursor(shape);
         return;
     }
     // NOTE: it is intended to not perform an XPointerGrab on X11. See documentation in kwineffects.h
     // The mouse grab is implemented by using a full screen input only window
     if (!m_mouseInterceptionWindow.isValid()) {
         const QSize &s = screens()->size();
         const QRect geo(0, 0, s.width(), s.height());
         const uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
         const uint32_t values[] = {
             true,
             XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION
         };
         m_mouseInterceptionWindow.reset(Xcb::createInputWindow(geo, mask, values));
         defineCursor(shape);
     } else {
         defineCursor(shape);
     }
     m_mouseInterceptionWindow.map();
     m_mouseInterceptionWindow.raise();
     // Raise electric border windows above the input windows
     // so they can still be triggered.
     ScreenEdges::self()->ensureOnTop();
 }
 
 void EffectsHandlerImpl::stopMouseInterception(Effect *effect)
 {
     if (!m_grabbedMouseEffects.contains(effect)) {
         return;
     }
     m_grabbedMouseEffects.removeAll(effect);
     if (kwinApp()->operationMode() != Application::OperationModeX11) {
         input()->pointer()->removeEffectsOverrideCursor();
         return;
     }
     if (m_grabbedMouseEffects.isEmpty()) {
         m_mouseInterceptionWindow.unmap();
         Workspace::self()->stackScreenEdgesUnderOverrideRedirect();
     }
 }
 
 bool EffectsHandlerImpl::isMouseInterception() const
 {
     return m_grabbedMouseEffects.count() > 0;
 }
 
 
 bool EffectsHandlerImpl::touchDown(quint32 id, const QPointF &pos, quint32 time)
 {
     // TODO: reverse call order?
     for (auto it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if (it->second->touchDown(id, pos, time)) {
             return true;
         }
     }
     return false;
 }
 
 bool EffectsHandlerImpl::touchMotion(quint32 id, const QPointF &pos, quint32 time)
 {
     // TODO: reverse call order?
     for (auto it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if (it->second->touchMotion(id, pos, time)) {
             return true;
         }
     }
     return false;
 }
 
 bool EffectsHandlerImpl::touchUp(quint32 id, quint32 time)
 {
     // TODO: reverse call order?
     for (auto it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if (it->second->touchUp(id, time)) {
             return true;
         }
     }
     return false;
 }
 
 void EffectsHandlerImpl::registerGlobalShortcut(const QKeySequence &shortcut, QAction *action)
 {
     input()->registerShortcut(shortcut, action);
 }
 
 void EffectsHandlerImpl::registerPointerShortcut(Qt::KeyboardModifiers modifiers, Qt::MouseButton pointerButtons, QAction *action)
 {
     input()->registerPointerShortcut(modifiers, pointerButtons, action);
 }
 
 void EffectsHandlerImpl::registerAxisShortcut(Qt::KeyboardModifiers modifiers, PointerAxisDirection axis, QAction *action)
 {
     input()->registerAxisShortcut(modifiers, axis, action);
 }
 
 void EffectsHandlerImpl::registerTouchpadSwipeShortcut(SwipeDirection direction, QAction *action)
 {
     input()->registerTouchpadSwipeShortcut(direction, action);
 }
 
 void* EffectsHandlerImpl::getProxy(QString name)
 {
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it)
         if ((*it).first == name)
             return (*it).second->proxy();
 
     return NULL;
 }
 
 void EffectsHandlerImpl::startMousePolling()
 {
     if (Cursor::self())
         Cursor::self()->startMousePolling();
 }
 
 void EffectsHandlerImpl::stopMousePolling()
 {
     if (Cursor::self())
         Cursor::self()->stopMousePolling();
 }
 
 bool EffectsHandlerImpl::hasKeyboardGrab() const
 {
     return keyboard_grab_effect != NULL;
 }
 
 void EffectsHandlerImpl::desktopResized(const QSize &size)
 {
     m_scene->screenGeometryChanged(size);
     if (m_mouseInterceptionWindow.isValid()) {
         m_mouseInterceptionWindow.setGeometry(QRect(0, 0, size.width(), size.height()));
     }
     emit screenGeometryChanged(size);
 }
 
 void EffectsHandlerImpl::slotPropertyNotify(Toplevel* t, long int atom)
 {
     if (!registered_atoms.contains(atom))
         return;
     emit propertyNotify(t->effectWindow(), atom);
 }
 
 void EffectsHandlerImpl::registerPropertyType(long atom, bool reg)
 {
     if (reg)
         ++registered_atoms[ atom ]; // initialized to 0 if not present yet
     else {
         if (--registered_atoms[ atom ] == 0)
             registered_atoms.remove(atom);
     }
 }
 
 xcb_atom_t EffectsHandlerImpl::announceSupportProperty(const QByteArray &propertyName, Effect *effect)
 {
     PropertyEffectMap::iterator it = m_propertiesForEffects.find(propertyName);
     if (it != m_propertiesForEffects.end()) {
         // property has already been registered for an effect
         // just append Effect and return the atom stored in m_managedProperties
         if (!it.value().contains(effect)) {
             it.value().append(effect);
         }
         return m_managedProperties.value(propertyName);
     }
     // get the atom for the propertyName
     ScopedCPointer<xcb_intern_atom_reply_t> atomReply(xcb_intern_atom_reply(connection(),
         xcb_intern_atom_unchecked(connection(), false, propertyName.size(), propertyName.constData()),
         NULL));
     if (atomReply.isNull()) {
         return XCB_ATOM_NONE;
     }
     m_compositor->keepSupportProperty(atomReply->atom);
     // announce property on root window
     unsigned char dummy = 0;
     xcb_change_property(connection(), XCB_PROP_MODE_REPLACE, rootWindow(), atomReply->atom, atomReply->atom, 8, 1, &dummy);
     // TODO: add to _NET_SUPPORTED
     m_managedProperties.insert(propertyName, atomReply->atom);
     m_propertiesForEffects.insert(propertyName, QList<Effect*>() << effect);
     registerPropertyType(atomReply->atom, true);
     return atomReply->atom;
 }
 
 void EffectsHandlerImpl::removeSupportProperty(const QByteArray &propertyName, Effect *effect)
 {
     PropertyEffectMap::iterator it = m_propertiesForEffects.find(propertyName);
     if (it == m_propertiesForEffects.end()) {
         // property is not registered - nothing to do
         return;
     }
     if (!it.value().contains(effect)) {
         // property is not registered for given effect - nothing to do
         return;
     }
     it.value().removeAll(effect);
     if (!it.value().isEmpty()) {
         // property still registered for another effect - nothing further to do
         return;
     }
     const xcb_atom_t atom = m_managedProperties.take(propertyName);
     registerPropertyType(atom, false);
     m_propertiesForEffects.remove(propertyName);
     m_compositor->removeSupportProperty(atom); // delayed removal
 }
 
 QByteArray EffectsHandlerImpl::readRootProperty(long atom, long type, int format) const
 {
     return readWindowProperty(rootWindow(), atom, type, format);
 }
 
 void EffectsHandlerImpl::activateWindow(EffectWindow* c)
 {
     if (AbstractClient* cl = dynamic_cast< AbstractClient* >(static_cast<EffectWindowImpl*>(c)->window()))
         Workspace::self()->activateClient(cl, true);
 }
 
 EffectWindow* EffectsHandlerImpl::activeWindow() const
 {
     return Workspace::self()->activeClient() ? Workspace::self()->activeClient()->effectWindow() : NULL;
 }
 
 void EffectsHandlerImpl::moveWindow(EffectWindow* w, const QPoint& pos, bool snap, double snapAdjust)
 {
     AbstractClient* cl = dynamic_cast< AbstractClient* >(static_cast<EffectWindowImpl*>(w)->window());
     if (!cl || !cl->isMovable())
         return;
 
     if (snap)
         cl->move(Workspace::self()->adjustClientPosition(cl, pos, true, snapAdjust));
     else
         cl->move(pos);
 }
 
 void EffectsHandlerImpl::windowToDesktop(EffectWindow* w, int desktop)
 {
     AbstractClient* cl = dynamic_cast< AbstractClient* >(static_cast<EffectWindowImpl*>(w)->window());
     if (cl && !cl->isDesktop() && !cl->isDock())
         Workspace::self()->sendClientToDesktop(cl, desktop, true);
 }
 
 void EffectsHandlerImpl::windowToScreen(EffectWindow* w, int screen)
 {
     AbstractClient* cl = dynamic_cast< AbstractClient* >(static_cast<EffectWindowImpl*>(w)->window());
     if (cl && !cl->isDesktop() && !cl->isDock())
         Workspace::self()->sendClientToScreen(cl, screen);
 }
 
 void EffectsHandlerImpl::setShowingDesktop(bool showing)
 {
     Workspace::self()->setShowingDesktop(showing);
 }
 
 QString EffectsHandlerImpl::currentActivity() const
 {
 #ifdef KWIN_BUILD_ACTIVITIES
     if (!Activities::self()) {
         return QString();
     }
     return Activities::self()->current();
 #else
     return QString();
 #endif
 }
 
 int EffectsHandlerImpl::currentDesktop() const
 {
     return VirtualDesktopManager::self()->current();
 }
 
 int EffectsHandlerImpl::numberOfDesktops() const
 {
     return VirtualDesktopManager::self()->count();
 }
 
 void EffectsHandlerImpl::setCurrentDesktop(int desktop)
 {
     VirtualDesktopManager::self()->setCurrent(desktop);
 }
 
 void EffectsHandlerImpl::setNumberOfDesktops(int desktops)
 {
     VirtualDesktopManager::self()->setCount(desktops);
 }
 
 QSize EffectsHandlerImpl::desktopGridSize() const
 {
     return VirtualDesktopManager::self()->grid().size();
 }
 
 int EffectsHandlerImpl::desktopGridWidth() const
 {
     return desktopGridSize().width();
 }
 
 int EffectsHandlerImpl::desktopGridHeight() const
 {
     return desktopGridSize().height();
 }
 
 int EffectsHandlerImpl::workspaceWidth() const
 {
     return desktopGridWidth() * displayWidth();
 }
 
 int EffectsHandlerImpl::workspaceHeight() const
 {
     return desktopGridHeight() * displayHeight();
 }
 
 int EffectsHandlerImpl::desktopAtCoords(QPoint coords) const
 {
     if (auto vd = VirtualDesktopManager::self()->grid().at(coords)) {
         return vd->x11DesktopNumber();
     }
     return 0;
 }
 
 QPoint EffectsHandlerImpl::desktopGridCoords(int id) const
 {
     return VirtualDesktopManager::self()->grid().gridCoords(id);
 }
 
 QPoint EffectsHandlerImpl::desktopCoords(int id) const
 {
     QPoint coords = VirtualDesktopManager::self()->grid().gridCoords(id);
     if (coords.x() == -1)
         return QPoint(-1, -1);
     return QPoint(coords.x() * displayWidth(), coords.y() * displayHeight());
 }
 
 int EffectsHandlerImpl::desktopAbove(int desktop, bool wrap) const
 {
     return getDesktop<DesktopAbove>(desktop, wrap);
 }
 
 int EffectsHandlerImpl::desktopToRight(int desktop, bool wrap) const
 {
     return getDesktop<DesktopRight>(desktop, wrap);
 }
 
 int EffectsHandlerImpl::desktopBelow(int desktop, bool wrap) const
 {
     return getDesktop<DesktopBelow>(desktop, wrap);
 }
 
 int EffectsHandlerImpl::desktopToLeft(int desktop, bool wrap) const
 {
     return getDesktop<DesktopLeft>(desktop, wrap);
 }
 
 QString EffectsHandlerImpl::desktopName(int desktop) const
 {
     return VirtualDesktopManager::self()->name(desktop);
 }
 
 bool EffectsHandlerImpl::optionRollOverDesktops() const
 {
     return options->isRollOverDesktops();
 }
 
 double EffectsHandlerImpl::animationTimeFactor() const
 {
     return options->animationTimeFactor();
 }
 
 WindowQuadType EffectsHandlerImpl::newWindowQuadType()
 {
     return WindowQuadType(next_window_quad_type++);
 }
 
 EffectWindow* EffectsHandlerImpl::findWindow(WId id) const
 {
     if (Client* w = Workspace::self()->findClient(Predicate::WindowMatch, id))
         return w->effectWindow();
     if (Unmanaged* w = Workspace::self()->findUnmanaged(id))
         return w->effectWindow();
     if (waylandServer()) {
         if (ShellClient *w = waylandServer()->findClient(id)) {
             return w->effectWindow();
         }
     }
     return NULL;
 }
 
 EffectWindow* EffectsHandlerImpl::findWindow(KWayland::Server::SurfaceInterface *surf) const
 {
     if (waylandServer()) {
         if (ShellClient *w = waylandServer()->findClient(surf)) {
             return w->effectWindow();
         }
     }
     return nullptr;
 }
 
 
 EffectWindowList EffectsHandlerImpl::stackingOrder() const
 {
     ToplevelList list = Workspace::self()->xStackingOrder();
     EffectWindowList ret;
     for (Toplevel *t : list) {
         if (EffectWindow *w = effectWindow(t))
             ret.append(w);
     }
     return ret;
 }
 
 void EffectsHandlerImpl::setElevatedWindow(KWin::EffectWindow* w, bool set)
 {
     elevated_windows.removeAll(w);
     if (set)
         elevated_windows.append(w);
 }
 
 void EffectsHandlerImpl::setTabBoxWindow(EffectWindow* w)
 {
 #ifdef KWIN_BUILD_TABBOX
     if (AbstractClient* c = dynamic_cast< AbstractClient* >(static_cast< EffectWindowImpl* >(w)->window())) {
         TabBox::TabBox::self()->setCurrentClient(c);
     }
 #else
     Q_UNUSED(w)
 #endif
 }
 
 void EffectsHandlerImpl::setTabBoxDesktop(int desktop)
 {
 #ifdef KWIN_BUILD_TABBOX
     TabBox::TabBox::self()->setCurrentDesktop(desktop);
 #else
     Q_UNUSED(desktop)
 #endif
 }
 
 EffectWindowList EffectsHandlerImpl::currentTabBoxWindowList() const
 {
 #ifdef KWIN_BUILD_TABBOX
     EffectWindowList ret;
     const auto clients = TabBox::TabBox::self()->currentClientList();
     for (auto c : clients)
     ret.append(c->effectWindow());
     return ret;
 #else
     return EffectWindowList();
 #endif
 }
 
 void EffectsHandlerImpl::refTabBox()
 {
 #ifdef KWIN_BUILD_TABBOX
     TabBox::TabBox::self()->reference();
 #endif
 }
 
 void EffectsHandlerImpl::unrefTabBox()
 {
 #ifdef KWIN_BUILD_TABBOX
     TabBox::TabBox::self()->unreference();
 #endif
 }
 
 void EffectsHandlerImpl::closeTabBox()
 {
 #ifdef KWIN_BUILD_TABBOX
     TabBox::TabBox::self()->close();
 #endif
 }
 
 QList< int > EffectsHandlerImpl::currentTabBoxDesktopList() const
 {
 #ifdef KWIN_BUILD_TABBOX
     return TabBox::TabBox::self()->currentDesktopList();
 #endif
     return QList< int >();
 }
 
 int EffectsHandlerImpl::currentTabBoxDesktop() const
 {
 #ifdef KWIN_BUILD_TABBOX
     return TabBox::TabBox::self()->currentDesktop();
 #endif
     return -1;
 }
 
 EffectWindow* EffectsHandlerImpl::currentTabBoxWindow() const
 {
 #ifdef KWIN_BUILD_TABBOX
     if (auto c = TabBox::TabBox::self()->currentClient())
         return c->effectWindow();
 #endif
     return NULL;
 }
 
 void EffectsHandlerImpl::addRepaintFull()
 {
     m_compositor->addRepaintFull();
 }
 
 void EffectsHandlerImpl::addRepaint(const QRect& r)
 {
     m_compositor->addRepaint(r);
 }
 
 void EffectsHandlerImpl::addRepaint(const QRegion& r)
 {
     m_compositor->addRepaint(r);
 }
 
 void EffectsHandlerImpl::addRepaint(int x, int y, int w, int h)
 {
     m_compositor->addRepaint(x, y, w, h);
 }
 
 int EffectsHandlerImpl::activeScreen() const
 {
     return screens()->current();
 }
 
 int EffectsHandlerImpl::numScreens() const
 {
     return screens()->count();
 }
 
 int EffectsHandlerImpl::screenNumber(const QPoint& pos) const
 {
     return screens()->number(pos);
 }
 
 QRect EffectsHandlerImpl::clientArea(clientAreaOption opt, int screen, int desktop) const
 {
     return Workspace::self()->clientArea(opt, screen, desktop);
 }
 
 QRect EffectsHandlerImpl::clientArea(clientAreaOption opt, const EffectWindow* c) const
 {
     const Toplevel* t = static_cast< const EffectWindowImpl* >(c)->window();
     if (const AbstractClient* cl = dynamic_cast< const AbstractClient* >(t))
         return Workspace::self()->clientArea(opt, cl);
     else
         return Workspace::self()->clientArea(opt, t->geometry().center(), VirtualDesktopManager::self()->current());
 }
 
 QRect EffectsHandlerImpl::clientArea(clientAreaOption opt, const QPoint& p, int desktop) const
 {
     return Workspace::self()->clientArea(opt, p, desktop);
 }
 
 QRect EffectsHandlerImpl::virtualScreenGeometry() const
 {
     return screens()->geometry();
 }
 
 QSize EffectsHandlerImpl::virtualScreenSize() const
 {
     return screens()->size();
 }
 
 void EffectsHandlerImpl::defineCursor(Qt::CursorShape shape)
 {
     if (!m_mouseInterceptionWindow.isValid()) {
         input()->pointer()->setEffectsOverrideCursor(shape);
         return;
     }
     const xcb_cursor_t c = Cursor::x11Cursor(shape);
     if (c != XCB_CURSOR_NONE) {
         m_mouseInterceptionWindow.defineCursor(c);
     }
 }
 
 bool EffectsHandlerImpl::checkInputWindowEvent(xcb_button_press_event_t *e)
 {
     if (m_grabbedMouseEffects.isEmpty() || m_mouseInterceptionWindow != e->event) {
         return false;
     }
     for (Effect *effect : m_grabbedMouseEffects) {
         Qt::MouseButton button = x11ToQtMouseButton(e->detail);
         Qt::MouseButtons buttons = x11ToQtMouseButtons(e->state);
         const QEvent::Type type = ((e->response_type & ~0x80) == XCB_BUTTON_PRESS) ? QEvent::MouseButtonPress : QEvent::MouseButtonRelease;
         if (type == QEvent::MouseButtonPress) {
             buttons |= button;
         } else {
             buttons &= ~button;
         }
         QMouseEvent ev(type,
                         QPoint(e->event_x, e->event_y), QPoint(e->root_x, e->root_y),
                         button, buttons, x11ToQtKeyboardModifiers(e->state));
         effect->windowInputMouseEvent(&ev);
     }
     return true; // eat event
 }
 
 bool EffectsHandlerImpl::checkInputWindowEvent(xcb_motion_notify_event_t *e)
 {
     if (m_grabbedMouseEffects.isEmpty() || m_mouseInterceptionWindow != e->event) {
         return false;
     }
     for (Effect *effect : m_grabbedMouseEffects) {
         QMouseEvent ev(QEvent::MouseMove, QPoint(e->event_x, e->event_y), QPoint(e->root_x, e->root_y),
                         Qt::NoButton, x11ToQtMouseButtons(e->state), x11ToQtKeyboardModifiers(e->state));
         effect->windowInputMouseEvent(&ev);
     }
     return true; // eat event
 }
 
 bool EffectsHandlerImpl::checkInputWindowEvent(QMouseEvent *e)
 {
     if (m_grabbedMouseEffects.isEmpty()) {
         return false;
     }
     foreach (Effect *effect, m_grabbedMouseEffects) {
         effect->windowInputMouseEvent(e);
     }
     return true;
 }
 
 bool EffectsHandlerImpl::checkInputWindowEvent(QWheelEvent *e)
 {
     if (m_grabbedMouseEffects.isEmpty()) {
         return false;
     }
     foreach (Effect *effect, m_grabbedMouseEffects) {
         effect->windowInputMouseEvent(e);
     }
     return true;
 }
 
 void EffectsHandlerImpl::connectNotify(const QMetaMethod &signal)
 {
     if (signal == QMetaMethod::fromSignal(&EffectsHandler::cursorShapeChanged)) {
         if (!m_trackingCursorChanges) {
             connect(Cursor::self(), &Cursor::cursorChanged, this, &EffectsHandler::cursorShapeChanged);
             Cursor::self()->startCursorTracking();
         }
         ++m_trackingCursorChanges;
     }
     EffectsHandler::connectNotify(signal);
 }
 
 void EffectsHandlerImpl::disconnectNotify(const QMetaMethod &signal)
 {
     if (signal == QMetaMethod::fromSignal(&EffectsHandler::cursorShapeChanged)) {
         Q_ASSERT(m_trackingCursorChanges > 0);
         if (!--m_trackingCursorChanges) {
             Cursor::self()->stopCursorTracking();
             disconnect(Cursor::self(), &Cursor::cursorChanged, this, &EffectsHandler::cursorShapeChanged);
         }
     }
     EffectsHandler::disconnectNotify(signal);
 }
 
 
 void EffectsHandlerImpl::checkInputWindowStacking()
 {
     if (m_grabbedMouseEffects.isEmpty()) {
         return;
     }
     if (kwinApp()->operationMode() != Application::OperationModeX11) {
         return;
     }
     m_mouseInterceptionWindow.raise();
     // Raise electric border windows above the input windows
     // so they can still be triggered. TODO: Do both at once.
     ScreenEdges::self()->ensureOnTop();
 }
 
 QPoint EffectsHandlerImpl::cursorPos() const
 {
     return Cursor::pos();
 }
 
 void EffectsHandlerImpl::reserveElectricBorder(ElectricBorder border, Effect *effect)
 {
     ScreenEdges::self()->reserve(border, effect, "borderActivated");
 }
 
 void EffectsHandlerImpl::unreserveElectricBorder(ElectricBorder border, Effect *effect)
 {
     ScreenEdges::self()->unreserve(border, effect);
 }
 
 unsigned long EffectsHandlerImpl::xrenderBufferPicture()
 {
 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
     if (SceneXrender* s = dynamic_cast< SceneXrender* >(m_scene))
         return s->bufferPicture();
 #endif
     return None;
 }
 
 QPainter *EffectsHandlerImpl::scenePainter()
 {
     if (SceneQPainter *s = dynamic_cast<SceneQPainter*>(m_scene)) {
         return s->painter();
     } else {
         return NULL;
     }
 }
 
 void EffectsHandlerImpl::toggleEffect(const QString& name)
 {
     if (isEffectLoaded(name))
         unloadEffect(name);
     else
         loadEffect(name);
 }
 
 QStringList EffectsHandlerImpl::loadedEffects() const
 {
     QStringList listModules;
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         listModules << (*it).first;
     }
     return listModules;
 }
 
 QStringList EffectsHandlerImpl::listOfEffects() const
 {
     return m_effectLoader->listOfKnownEffects();
 }
 
 bool EffectsHandlerImpl::loadEffect(const QString& name)
 {
     makeOpenGLContextCurrent();
     m_compositor->addRepaintFull();
 
     return m_effectLoader->loadEffect(name);
 }
 
 void EffectsHandlerImpl::unloadEffect(const QString& name)
 {
     makeOpenGLContextCurrent();
     m_compositor->addRepaintFull();
 
     for (QMap< int, EffectPair >::iterator it = effect_order.begin(); it != effect_order.end(); ++it) {
         if (it.value().first == name) {
             qCDebug(KWIN_CORE) << "EffectsHandler::unloadEffect : Unloading Effect : " << name;
             if (activeFullScreenEffect() == it.value().second) {
                 setActiveFullScreenEffect(0);
             }
             stopMouseInterception(it.value().second);
             // remove support properties for the effect
             const QList<QByteArray> properties = m_propertiesForEffects.keys();
             for (const QByteArray &property : properties) {
                 removeSupportProperty(property, it.value().second);
             }
             delete it.value().second;
             effect_order.erase(it);
             effectsChanged();
             return;
         }
     }
 
     qCDebug(KWIN_CORE) << "EffectsHandler::unloadEffect : Effect not loaded : " << name;
 }
 
 void EffectsHandlerImpl::reconfigureEffect(const QString& name)
 {
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it)
         if ((*it).first == name) {
             kwinApp()->config()->reparseConfiguration();
             makeOpenGLContextCurrent();
             (*it).second->reconfigure(Effect::ReconfigureAll);
             return;
         }
 }
 
 bool EffectsHandlerImpl::isEffectLoaded(const QString& name) const
 {
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it)
         if ((*it).first == name)
             return true;
 
     return false;
 }
 
 bool EffectsHandlerImpl::isEffectSupported(const QString &name)
 {
     // if the effect is loaded, it is obviously supported
     auto it = std::find_if(loaded_effects.constBegin(), loaded_effects.constEnd(), [name](const EffectPair &pair) {
         return pair.first == name;
     });
     if (it != loaded_effects.constEnd()) {
         return true;
     }
 
     // next checks might require a context
     makeOpenGLContextCurrent();
     m_compositor->addRepaintFull();
 
     return m_effectLoader->isEffectSupported(name);
 
 }
 
 QList< bool > EffectsHandlerImpl::areEffectsSupported(const QStringList &names)
 {
     QList< bool > retList;
     for (const QString &name : names) {
         retList << isEffectSupported(name);
     }
     return retList;
 }
 
 void EffectsHandlerImpl::reloadEffect(Effect *effect)
 {
     QString effectName;
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if ((*it).second == effect) {
             effectName = (*it).first;
             break;
         }
     }
     if (!effectName.isNull()) {
         unloadEffect(effectName);
         m_effectLoader->loadEffect(effectName);
     }
 }
 
 void EffectsHandlerImpl::effectsChanged()
 {
     loaded_effects.clear();
     m_activeEffects.clear(); // it's possible to have a reconfigure and a quad rebuild between two paint cycles - bug #308201
 //    qDebug() << "Recreating effects' list:";
     for (const EffectPair & effect : effect_order) {
 //        qDebug() << effect.first;
         loaded_effects.append(effect);
     }
     m_activeEffects.reserve(loaded_effects.count());
 }
 
 QStringList EffectsHandlerImpl::activeEffects() const
 {
     QStringList ret;
     for(QVector< KWin::EffectPair >::const_iterator it = loaded_effects.constBegin(),
                                                     end = loaded_effects.constEnd(); it != end; ++it) {
             if (it->second->isActive()) {
                 ret << it->first;
             }
         }
     return ret;
 }
 
 KWayland::Server::Display *EffectsHandlerImpl::waylandDisplay() const
 {
     if (waylandServer()) {
         return waylandServer()->display();
     }
     return nullptr;
 }
 
 EffectFrame* EffectsHandlerImpl::effectFrame(EffectFrameStyle style, bool staticSize, const QPoint& position, Qt::Alignment alignment) const
 {
     return new EffectFrameImpl(style, staticSize, position, alignment);
 }
 
 
 QVariant EffectsHandlerImpl::kwinOption(KWinOption kwopt)
 {
     switch (kwopt) {
     case CloseButtonCorner:
         // TODO: this could become per window and be derived from the actual position in the deco
         return Decoration::DecorationBridge::self()->settings()->decorationButtonsLeft().contains(KDecoration2::DecorationButtonType::Close) ? Qt::TopLeftCorner : Qt::TopRightCorner;
     case SwitchDesktopOnScreenEdge:
         return ScreenEdges::self()->isDesktopSwitching();
     case SwitchDesktopOnScreenEdgeMovingWindows:
         return ScreenEdges::self()->isDesktopSwitchingMovingClients();
     default:
         return QVariant(); // an invalid one
     }
 }
 
 QString EffectsHandlerImpl::supportInformation(const QString &name) const
 {
     if (!isEffectLoaded(name)) {
         return QString();
     }
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if ((*it).first == name) {
             QString support((*it).first + QLatin1String(":\n"));
             const QMetaObject *metaOptions = (*it).second->metaObject();
             for (int i=0; i<metaOptions->propertyCount(); ++i) {
                 const QMetaProperty property = metaOptions->property(i);
                 if (qstrcmp(property.name(), "objectName") == 0) {
                     continue;
                 }
                 support += QString::fromUtf8(property.name()) + QLatin1String(": ") + (*it).second->property(property.name()).toString() + QLatin1Char('\n');
             }
             return support;
         }
     }
     return QString();
 }
 
 
 bool EffectsHandlerImpl::isScreenLocked() const
 {
     return ScreenLockerWatcher::self()->isLocked();
 }
 
 QString EffectsHandlerImpl::debug(const QString& name, const QString& parameter) const
 {
     QString internalName = name.toLower();;
     for (QVector< EffectPair >::const_iterator it = loaded_effects.constBegin(); it != loaded_effects.constEnd(); ++it) {
         if ((*it).first == internalName) {
             return it->second->debug(parameter);
         }
     }
     return QString();
 }
 
 bool EffectsHandlerImpl::makeOpenGLContextCurrent()
 {
     return m_scene->makeOpenGLContextCurrent();
 }
 
 void EffectsHandlerImpl::doneOpenGLContextCurrent()
 {
     m_scene->doneOpenGLContextCurrent();
 }
 
 bool EffectsHandlerImpl::animationsSupported() const
 {
     static const QByteArray forceEnvVar = qgetenv("KWIN_EFFECTS_FORCE_ANIMATIONS");
     if (!forceEnvVar.isEmpty()) {
         static const int forceValue = forceEnvVar.toInt();
         return forceValue == 1;
     }
     return m_scene->animationsSupported();
 }
 
 void EffectsHandlerImpl::highlightWindows(const QVector<EffectWindow *> &windows)
 {
     Effect *e = provides(Effect::HighlightWindows);
     if (!e) {
         return;
     }
     e->perform(Effect::HighlightWindows, QVariantList{QVariant::fromValue(windows)});
 }
 
 PlatformCursorImage EffectsHandlerImpl::cursorImage() const
 {
     return kwinApp()->platform()->cursorImage();
 }
 
 void EffectsHandlerImpl::hideCursor()
 {
     kwinApp()->platform()->hideCursor();
 }
 
 void EffectsHandlerImpl::showCursor()
 {
     kwinApp()->platform()->showCursor();
 }
 
 void EffectsHandlerImpl::startInteractiveWindowSelection(std::function<void(KWin::EffectWindow*)> callback)
 {
     kwinApp()->platform()->startInteractiveWindowSelection(
         [callback] (KWin::Toplevel *t) {
             if (t && t->effectWindow()) {
                 callback(t->effectWindow());
             } else {
                 callback(nullptr);
             }
         }
     );
 }
 
 void EffectsHandlerImpl::startInteractivePositionSelection(std::function<void(const QPoint&)> callback)
 {
     kwinApp()->platform()->startInteractivePositionSelection(callback);
 }
 
 void EffectsHandlerImpl::showOnScreenMessage(const QString &message, const QString &iconName)
 {
     OSD::show(message, iconName);
 }
 
 void EffectsHandlerImpl::hideOnScreenMessage(OnScreenMessageHideFlags flags)
 {
     OSD::HideFlags osdFlags;
     if (flags.testFlag(OnScreenMessageHideFlag::SkipsCloseAnimation)) {
         osdFlags |= OSD::HideFlag::SkipCloseAnimation;
     }
     OSD::hide(osdFlags);
 }
 
 //****************************************
 // EffectWindowImpl
 //****************************************
 
 EffectWindowImpl::EffectWindowImpl(Toplevel *toplevel)
     : EffectWindow(toplevel)
     , toplevel(toplevel)
     , sw(NULL)
 {
 }
 
 EffectWindowImpl::~EffectWindowImpl()
 {
     QVariant cachedTextureVariant = data(LanczosCacheRole);
     if (cachedTextureVariant.isValid()) {
         GLTexture *cachedTexture = static_cast< GLTexture*>(cachedTextureVariant.value<void*>());
         delete cachedTexture;
     }
 }
 
 bool EffectWindowImpl::isPaintingEnabled()
 {
     return sceneWindow()->isPaintingEnabled();
 }
 
 void EffectWindowImpl::enablePainting(int reason)
 {
     sceneWindow()->enablePainting(reason);
 }
 
 void EffectWindowImpl::disablePainting(int reason)
 {
     sceneWindow()->disablePainting(reason);
 }
 
 const EffectWindowGroup* EffectWindowImpl::group() const
 {
     if (Client* c = dynamic_cast< Client* >(toplevel))
         return c->group()->effectGroup();
     return NULL; // TODO
 }
 
 void EffectWindowImpl::refWindow()
 {
     if (Deleted* d = dynamic_cast< Deleted* >(toplevel))
         return d->refWindow();
     abort(); // TODO
 }
 
 void EffectWindowImpl::unrefWindow()
 {
     if (Deleted* d = dynamic_cast< Deleted* >(toplevel))
         return d->unrefWindow();   // delays deletion in case
     abort(); // TODO
 }
 
 void EffectWindowImpl::setWindow(Toplevel* w)
 {
     toplevel = w;
     setParent(w);
 }
 
 void EffectWindowImpl::setSceneWindow(Scene::Window* w)
 {
     sw = w;
 }
 
 QRegion EffectWindowImpl::shape() const
 {
     return sw ? sw->shape() : geometry();
 }
 
 QRect EffectWindowImpl::decorationInnerRect() const
 {
     Client *client = dynamic_cast<Client*>(toplevel);
     return client ? client->transparentRect() : contentsRect();
 }
 
 QByteArray EffectWindowImpl::readProperty(long atom, long type, int format) const
 {
     return readWindowProperty(window()->window(), atom, type, format);
 }
 
 void EffectWindowImpl::deleteProperty(long int atom) const
 {
     deleteWindowProperty(window()->window(), atom);
 }
 
 EffectWindow* EffectWindowImpl::findModal()
 {
     if (AbstractClient* c = dynamic_cast< AbstractClient* >(toplevel)) {
         if (AbstractClient* c2 = c->findModal())
             return c2->effectWindow();
     }
     return NULL;
 }
 
 template <typename T>
 EffectWindowList getMainWindows(Toplevel *toplevel)
 {
     T *c = static_cast<T*>(toplevel);
     EffectWindowList ret;
     const auto mainclients = c->mainClients();
     for (auto tmp : mainclients)
         ret.append(tmp->effectWindow());
     return ret;
 }
 
 EffectWindowList EffectWindowImpl::mainWindows() const
 {
     if (dynamic_cast<AbstractClient*>(toplevel)) {
         return getMainWindows<AbstractClient>(toplevel);
     } else if (toplevel->isDeleted()) {
         return getMainWindows<Deleted>(toplevel);
     }
     return EffectWindowList();
 }
 
 WindowQuadList EffectWindowImpl::buildQuads(bool force) const
 {
     return sceneWindow()->buildQuads(force);
 }
 
 void EffectWindowImpl::setData(int role, const QVariant &data)
 {
     if (!data.isNull())
         dataMap[ role ] = data;
     else
         dataMap.remove(role);
     emit effects->windowDataChanged(this, role);
 }
 
 QVariant EffectWindowImpl::data(int role) const
 {
     if (!dataMap.contains(role))
         return QVariant();
     return dataMap[ role ];
 }
 
 EffectWindow* effectWindow(Toplevel* w)
 {
     EffectWindowImpl* ret = w->effectWindow();
     return ret;
 }
 
 EffectWindow* effectWindow(Scene::Window* w)
 {
     EffectWindowImpl* ret = w->window()->effectWindow();
     ret->setSceneWindow(w);
     return ret;
 }
 
 void EffectWindowImpl::elevate(bool elevate)
 {
     effects->setElevatedWindow(this, elevate);
 }
 
 void EffectWindowImpl::registerThumbnail(AbstractThumbnailItem *item)
 {
     if (WindowThumbnailItem *thumb = qobject_cast<WindowThumbnailItem*>(item)) {
         insertThumbnail(thumb);
         connect(thumb, SIGNAL(destroyed(QObject*)), SLOT(thumbnailDestroyed(QObject*)));
         connect(thumb, SIGNAL(wIdChanged(qulonglong)), SLOT(thumbnailTargetChanged()));
     } else if (DesktopThumbnailItem *desktopThumb = qobject_cast<DesktopThumbnailItem*>(item)) {
         m_desktopThumbnails.append(desktopThumb);
         connect(desktopThumb, SIGNAL(destroyed(QObject*)), SLOT(desktopThumbnailDestroyed(QObject*)));
     }
 }
 
 void EffectWindowImpl::thumbnailDestroyed(QObject *object)
 {
     // we know it is a ThumbnailItem
     m_thumbnails.remove(static_cast<WindowThumbnailItem*>(object));
 }
 
 void EffectWindowImpl::thumbnailTargetChanged()
 {
     if (WindowThumbnailItem *item = qobject_cast<WindowThumbnailItem*>(sender())) {
         insertThumbnail(item);
     }
 }
 
 void EffectWindowImpl::insertThumbnail(WindowThumbnailItem *item)
 {
     EffectWindow *w = effects->findWindow(item->wId());
     if (w) {
         m_thumbnails.insert(item, QWeakPointer<EffectWindowImpl>(static_cast<EffectWindowImpl*>(w)));
     } else {
         m_thumbnails.insert(item, QWeakPointer<EffectWindowImpl>());
     }
 }
 
 void EffectWindowImpl::desktopThumbnailDestroyed(QObject *object)
 {
     // we know it is a DesktopThumbnailItem
     m_desktopThumbnails.removeAll(static_cast<DesktopThumbnailItem*>(object));
 }
 
 void EffectWindowImpl::referencePreviousWindowPixmap()
 {
     if (sw) {
         sw->referencePreviousPixmap();
     }
 }
 
 void EffectWindowImpl::unreferencePreviousWindowPixmap()
 {
     if (sw) {
         sw->unreferencePreviousPixmap();
     }
 }
 
 //****************************************
 // EffectWindowGroupImpl
 //****************************************
 
 
 EffectWindowList EffectWindowGroupImpl::members() const
 {
     EffectWindowList ret;
     for (Toplevel * c : group->members())
     ret.append(c->effectWindow());
     return ret;
 }
 
 //****************************************
 // EffectFrameImpl
 //****************************************
 
 EffectFrameImpl::EffectFrameImpl(EffectFrameStyle style, bool staticSize, QPoint position, Qt::Alignment alignment)
     : QObject(0)
     , EffectFrame()
     , m_style(style)
     , m_static(staticSize)
     , m_point(position)
     , m_alignment(alignment)
     , m_shader(NULL)
     , m_theme(new Plasma::Theme(this))
 {
     if (m_style == EffectFrameStyled) {
         m_frame.setImagePath(QStringLiteral("widgets/background"));
         m_frame.setCacheAllRenderedFrames(true);
         connect(m_theme, SIGNAL(themeChanged()), this, SLOT(plasmaThemeChanged()));
     }
     m_selection.setImagePath(QStringLiteral("widgets/viewitem"));
     m_selection.setElementPrefix(QStringLiteral("hover"));
     m_selection.setCacheAllRenderedFrames(true);
     m_selection.setEnabledBorders(Plasma::FrameSvg::AllBorders);
 
     m_sceneFrame = Compositor::self()->scene()->createEffectFrame(this);
 }
 
 EffectFrameImpl::~EffectFrameImpl()
 {
     delete m_sceneFrame;
 }
 
 const QFont& EffectFrameImpl::font() const
 {
     return m_font;
 }
 
 void EffectFrameImpl::setFont(const QFont& font)
 {
     if (m_font == font) {
         return;
     }
     m_font = font;
     QRect oldGeom = m_geometry;
     if (!m_text.isEmpty()) {
         autoResize();
     }
     if (oldGeom == m_geometry) {
         // Wasn't updated in autoResize()
         m_sceneFrame->freeTextFrame();
     }
 }
 
 void EffectFrameImpl::free()
 {
     m_sceneFrame->free();
 }
 
 const QRect& EffectFrameImpl::geometry() const
 {
     return m_geometry;
 }
 
 void EffectFrameImpl::setGeometry(const QRect& geometry, bool force)
 {
     QRect oldGeom = m_geometry;
     m_geometry = geometry;
     if (m_geometry == oldGeom && !force) {
         return;
     }
     effects->addRepaint(oldGeom);
     effects->addRepaint(m_geometry);
     if (m_geometry.size() == oldGeom.size() && !force) {
         return;
     }
 
     if (m_style == EffectFrameStyled) {
         qreal left, top, right, bottom;
         m_frame.getMargins(left, top, right, bottom);   // m_geometry is the inner geometry
         m_frame.resizeFrame(m_geometry.adjusted(-left, -top, right, bottom).size());
     }
 
     free();
 }
 
 const QIcon& EffectFrameImpl::icon() const
 {
     return m_icon;
 }
 
 void EffectFrameImpl::setIcon(const QIcon& icon)
 {
     m_icon = icon;
     if (isCrossFade()) {
         m_sceneFrame->crossFadeIcon();
     }
     if (m_iconSize.isEmpty() && !m_icon.availableSizes().isEmpty()) { // Set a size if we don't already have one
         setIconSize(m_icon.availableSizes().first());
     }
     m_sceneFrame->freeIconFrame();
 }
 
 const QSize& EffectFrameImpl::iconSize() const
 {
     return m_iconSize;
 }
 
 void EffectFrameImpl::setIconSize(const QSize& size)
 {
     if (m_iconSize == size) {
         return;
     }
     m_iconSize = size;
     autoResize();
     m_sceneFrame->freeIconFrame();
 }
 
 void EffectFrameImpl::plasmaThemeChanged()
 {
     free();
 }
 
 void EffectFrameImpl::render(QRegion region, double opacity, double frameOpacity)
 {
     if (m_geometry.isEmpty()) {
         return; // Nothing to display
     }
     m_shader = NULL;
     setScreenProjectionMatrix(static_cast<EffectsHandlerImpl*>(effects)->scene()->screenProjectionMatrix());
     effects->paintEffectFrame(this, region, opacity, frameOpacity);
 }
 
 void EffectFrameImpl::finalRender(QRegion region, double opacity, double frameOpacity) const
 {
     region = infiniteRegion(); // TODO: Old region doesn't seem to work with OpenGL
 
     m_sceneFrame->render(region, opacity, frameOpacity);
 }
 
 Qt::Alignment EffectFrameImpl::alignment() const
 {
     return m_alignment;
 }
 
 
 void
 EffectFrameImpl::align(QRect &geometry)
 {
     if (m_alignment & Qt::AlignLeft)
         geometry.moveLeft(m_point.x());
     else if (m_alignment & Qt::AlignRight)
         geometry.moveLeft(m_point.x() - geometry.width());
     else
         geometry.moveLeft(m_point.x() - geometry.width() / 2);
     if (m_alignment & Qt::AlignTop)
         geometry.moveTop(m_point.y());
     else if (m_alignment & Qt::AlignBottom)
         geometry.moveTop(m_point.y() - geometry.height());
     else
         geometry.moveTop(m_point.y() - geometry.height() / 2);
 }
 
 
 void EffectFrameImpl::setAlignment(Qt::Alignment alignment)
 {
     m_alignment = alignment;
     align(m_geometry);
     setGeometry(m_geometry);
 }
 
 void EffectFrameImpl::setPosition(const QPoint& point)
 {
     m_point = point;
     QRect geometry = m_geometry; // this is important, setGeometry need call repaint for old & new geometry
     align(geometry);
     setGeometry(geometry);
 }
 
 const QString& EffectFrameImpl::text() const
 {
     return m_text;
 }
 
 void EffectFrameImpl::setText(const QString& text)
 {
     if (m_text == text) {
         return;
     }
     if (isCrossFade()) {
         m_sceneFrame->crossFadeText();
     }
     m_text = text;
     QRect oldGeom = m_geometry;
     autoResize();
     if (oldGeom == m_geometry) {
         // Wasn't updated in autoResize()
         m_sceneFrame->freeTextFrame();
     }
 }
 
 void EffectFrameImpl::setSelection(const QRect& selection)
 {
     if (selection == m_selectionGeometry) {
         return;
     }
     m_selectionGeometry = selection;
     if (m_selectionGeometry.size() != m_selection.frameSize().toSize()) {
         m_selection.resizeFrame(m_selectionGeometry.size());
     }
     // TODO; optimize to only recreate when resizing
     m_sceneFrame->freeSelection();
 }
 
 void EffectFrameImpl::autoResize()
 {
     if (m_static)
         return; // Not automatically resizing
 
     QRect geometry;
     // Set size
     if (!m_text.isEmpty()) {
         QFontMetrics metrics(m_font);
         geometry.setSize(metrics.size(0, m_text));
     }
     if (!m_icon.isNull() && !m_iconSize.isEmpty()) {
         geometry.setLeft(-m_iconSize.width());
         if (m_iconSize.height() > geometry.height())
             geometry.setHeight(m_iconSize.height());
     }
 
     align(geometry);
     setGeometry(geometry);
 }
 
 QColor EffectFrameImpl::styledTextColor()
 {
     return m_theme->color(Plasma::Theme::TextColor);
 }
 
 } // namespace
diff --git a/effects/CMakeLists.txt b/effects/CMakeLists.txt
index 91d8b33d9..317d67e61 100644
--- a/effects/CMakeLists.txt
+++ b/effects/CMakeLists.txt
@@ -1,189 +1,190 @@
 # KI18N Translation Domain for this library
 add_definitions(-DTRANSLATION_DOMAIN=\"kwin_effects\" -DEFFECT_BUILTINS)
 
 include_directories(${KWIN_SOURCE_DIR}) # for xcbutils.h
 
 set(kwin_effect_OWN_LIBS
     kwineffects
 )
 
 if( KWIN_HAVE_XRENDER_COMPOSITING )
     set(kwin_effect_OWN_LIBS ${kwin_effect_OWN_LIBS} kwinxrenderutils)
 endif()
 
 set(kwin_effect_KDE_LIBS
     KF5::ConfigGui
     KF5::ConfigWidgets
     KF5::GlobalAccel
     KF5::I18n
     KF5::WindowSystem
     KF5::Plasma # screenedge effect
     KF5::IconThemes
     KF5::Service
     KF5::Notifications # screenshot effect
 )
 
 set(kwin_effect_QT_LIBS
     Qt5::Concurrent
     Qt5::DBus
     Qt5::Quick
     Qt5::X11Extras
 )
 
 set(kwin_effect_XLIB_LIBS
     ${X11_X11_LIB}
 )
 
 set(kwin_effect_XCB_LIBS
     XCB::XCB
     XCB::IMAGE
     XCB::XFIXES
 )
 
 if( KWIN_HAVE_XRENDER_COMPOSITING )
     set(kwin_effect_XCB_LIBS ${kwin_effect_XCB_LIBS} XCB::RENDER)
 endif()
 
 set(kwin_effect_OWN_LIBS ${kwin_effect_OWN_LIBS} kwinglutils)
 
 macro( KWIN4_ADD_EFFECT_BACKEND name )
     add_library( ${name} SHARED ${ARGN} )
     target_link_libraries( ${name} PRIVATE ${kwin_effect_OWN_LIBS} ${kwin_effect_KDE_LIBS} ${kwin_effect_QT_LIBS} ${kwin_effect_XLIB_LIBS} ${kwin_effect_XCB_LIBS})
 endmacro()
 
 # Adds effect plugin with given name. Sources are given after the name
 macro( KWIN4_ADD_EFFECT name )
     kwin4_add_effect_backend(kwin4_effect_${name} ${ARGN})
 
     set_target_properties(kwin4_effect_${name} PROPERTIES VERSION 1.0.0 SOVERSION 1 )
     set_target_properties(kwin4_effect_${name} PROPERTIES OUTPUT_NAME ${KWIN_NAME}4_effect_${name})
     install(TARGETS kwin4_effect_${name} ${INSTALL_TARGETS_DEFAULT_ARGS} )
 
 endmacro()
 
 # Install the KWin/Effect service type
 install( FILES kwineffect.desktop DESTINATION ${SERVICETYPES_INSTALL_DIR} )
 
 # Create initial variables
 set( kwin4_effect_include_directories )
 
 set( kwin4_effect_builtins_sources
     logging.cpp
     effect_builtins.cpp
     blur/blur.cpp
     blur/blurshader.cpp
     colorpicker/colorpicker.cpp
     cube/cube.cpp
     cube/cube_proxy.cpp
     cube/cubeslide.cpp
     coverswitch/coverswitch.cpp
     desktopgrid/desktopgrid.cpp
     diminactive/diminactive.cpp
     flipswitch/flipswitch.cpp
     glide/glide.cpp
     invert/invert.cpp
     lookingglass/lookingglass.cpp
     magiclamp/magiclamp.cpp
     magnifier/magnifier.cpp
     mouseclick/mouseclick.cpp
     mousemark/mousemark.cpp
     presentwindows/presentwindows.cpp
     presentwindows/presentwindows_proxy.cpp
     resize/resize.cpp
     showfps/showfps.cpp
     thumbnailaside/thumbnailaside.cpp
     touchpoints/touchpoints.cpp
     trackmouse/trackmouse.cpp
     windowgeometry/windowgeometry.cpp
     wobblywindows/wobblywindows.cpp
     zoom/zoom.cpp
     )
 
 qt5_add_resources( kwin4_effect_builtins_sources shaders.qrc )
 
 kconfig_add_kcfg_files(kwin4_effect_builtins_sources
     blur/blurconfig.kcfgc
     cube/cubeslideconfig.kcfgc
     cube/cubeconfig.kcfgc
     coverswitch/coverswitchconfig.kcfgc
     desktopgrid/desktopgridconfig.kcfgc
     diminactive/diminactiveconfig.kcfgc
     fallapart/fallapartconfig.kcfgc
     flipswitch/flipswitchconfig.kcfgc
     glide/glideconfig.kcfgc
     lookingglass/lookingglassconfig.kcfgc
     magiclamp/magiclampconfig.kcfgc
     magnifier/magnifierconfig.kcfgc
     mouseclick/mouseclickconfig.kcfgc
     mousemark/mousemarkconfig.kcfgc
     presentwindows/presentwindowsconfig.kcfgc
     resize/resizeconfig.kcfgc
     showfps/showfpsconfig.kcfgc
     slidingpopups/slidingpopupsconfig.kcfgc
     thumbnailaside/thumbnailasideconfig.kcfgc
     trackmouse/trackmouseconfig.kcfgc
     windowgeometry/windowgeometryconfig.kcfgc
     wobblywindows/wobblywindowsconfig.kcfgc
     zoom/zoomconfig.kcfgc
     )
 
 # scripted effects
 add_subdirectory( dialogparent )
 add_subdirectory( eyeonscreen )
 add_subdirectory( fade )
 add_subdirectory( fadedesktop )
+add_subdirectory( frozenapp )
 add_subdirectory( login )
 add_subdirectory( logout )
 add_subdirectory( maximize )
 add_subdirectory( morphingpopups )
 add_subdirectory( scalein )
 add_subdirectory( translucency )
 add_subdirectory( windowaperture )
 
 ###############################################################################
 # Built-in effects go here
 
 # Common effects
 add_subdirectory( desktopgrid )
 add_subdirectory( diminactive )
 include( dimscreen/CMakeLists.txt )
 include( fallapart/CMakeLists.txt )
 include( highlightwindow/CMakeLists.txt )
 include( kscreen/CMakeLists.txt )
 add_subdirectory( magiclamp )
 include( minimizeanimation/CMakeLists.txt )
 add_subdirectory( presentwindows )
 add_subdirectory( resize )
 include( screenedge/CMakeLists.txt )
 add_subdirectory( showfps )
 include( showpaint/CMakeLists.txt )
 include( slide/CMakeLists.txt )
 include( slideback/CMakeLists.txt )
 include( slidingpopups/CMakeLists.txt )
 add_subdirectory( thumbnailaside )
 add_subdirectory( windowgeometry )
 add_subdirectory( zoom )
 
 # OpenGL-specific effects
 add_subdirectory( blur )
 include( backgroundcontrast/CMakeLists.txt )
 add_subdirectory( coverswitch )
 add_subdirectory( cube )
 add_subdirectory( flipswitch )
 add_subdirectory( glide )
 add_subdirectory( invert )
 add_subdirectory( lookingglass )
 add_subdirectory( magnifier )
 add_subdirectory( mouseclick )
 add_subdirectory( mousemark )
 include( screenshot/CMakeLists.txt )
 include( sheet/CMakeLists.txt )
 include( snaphelper/CMakeLists.txt )
 include( startupfeedback/CMakeLists.txt )
 add_subdirectory( trackmouse )
 add_subdirectory( wobblywindows )
 
 ###############################################################################
 
 # Add the builtins plugin
 kwin4_add_effect( builtins ${kwin4_effect_builtins_sources} )
diff --git a/effects/frozenapp/CMakeLists.txt b/effects/frozenapp/CMakeLists.txt
new file mode 100644
index 000000000..1242620d4
--- /dev/null
+++ b/effects/frozenapp/CMakeLists.txt
@@ -0,0 +1 @@
+add_subdirectory(package)
diff --git a/effects/frozenapp/package/CMakeLists.txt b/effects/frozenapp/package/CMakeLists.txt
new file mode 100644
index 000000000..e426a84b2
--- /dev/null
+++ b/effects/frozenapp/package/CMakeLists.txt
@@ -0,0 +1,6 @@
+install(DIRECTORY contents DESTINATION ${DATA_INSTALL_DIR}/${KWIN_NAME}/effects/kwin4_effect_frozenapp)
+install(FILES metadata.desktop DESTINATION ${DATA_INSTALL_DIR}/${KWIN_NAME}/effects/kwin4_effect_frozenapp)
+
+install(FILES metadata.desktop
+        DESTINATION ${SERVICES_INSTALL_DIR}/${KWIN_NAME}
+        RENAME kwin4_effect_frozenapp.desktop)
diff --git a/effects/frozenapp/package/contents/code/main.js b/effects/frozenapp/package/contents/code/main.js
new file mode 100644
index 000000000..be23fb632
--- /dev/null
+++ b/effects/frozenapp/package/contents/code/main.js
@@ -0,0 +1,142 @@
+/********************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+ Copyright (C) 2017 Kai Uwe Broulik <kde@privat.broulik.de>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*********************************************************************/
+/*global effect, effects, animate, animationTime, Effect*/
+var frozenAppEffect = {
+    inDuration: animationTime(1500),
+    outDuration: animationTime(250),
+    loadConfig: function () {
+        "use strict";
+        frozenAppEffect.inDuration = animationTime(1500);
+        frozenAppEffect.outDuration = animationTime(250);
+    },
+    windowAdded: function (window) {
+        "use strict";
+        if (!window || !window.unresponsive) {
+            return;
+        }
+        frozenAppEffect.windowBecameUnresponsive(window);
+    },
+    windowBecameUnresponsive: function (window) {
+        "use strict";
+        if (window.unresponsiveAnimation) {
+            return;
+        }
+        frozenAppEffect.startAnimation(window, frozenAppEffect.inDuration);
+    },
+    startAnimation: function (window, duration) {
+        "use strict";
+        if (!window.visible) {
+            return;
+        }
+        window.unresponsiveAnimation = set({
+            window: window,
+            duration: duration,
+            animations: [{
+                type: Effect.Saturation,
+                to: 0.1
+            }, {
+                type: Effect.Brightness,
+                to: 1.5
+            }]
+        });
+    },
+    windowClosed: function (window) {
+        "use strict";
+        frozenAppEffect.cancelAnimation(window);
+        if (!window.unresponsive) {
+            return;
+        }
+        frozenAppEffect.windowBecameResponsive(window);
+    },
+    windowBecameResponsive: function (window) {
+        "use strict";
+        if (!window.unresponsiveAnimation) {
+            return;
+        }
+        cancel(window.unresponsiveAnimation);
+        window.unresponsiveAnimation = undefined;
+
+        animate({
+            window: window,
+            duration: frozenAppEffect.outDuration,
+            animations: [{
+                type: Effect.Saturation,
+                from: 0.1,
+                to: 1.0
+            }, {
+                type: Effect.Brightness,
+                from: 1.5,
+                to: 1.0
+            }]
+        });
+    },
+    cancelAnimation: function (window) {
+        "use strict";
+        if (window.unresponsiveAnimation) {
+            print(window);
+            cancel(window.unresponsiveAnimation);
+            window.unresponsiveAnimation = undefined;
+        }
+    },
+    desktopChanged: function () {
+        "use strict";
+
+        var windows = effects.stackingOrder;
+        for (var i = 0, length = windows.length; i < length; ++i) {
+            print(i);
+            var window = windows[i];
+            frozenAppEffect.cancelAnimation(window);
+            frozenAppEffect.restartAnimation(window);
+        }
+    },
+    unresponsiveChanged: function (window) {
+        "use strict";
+        if (window.unresponsive) {
+            frozenAppEffect.windowBecameUnresponsive(window);
+        } else {
+            frozenAppEffect.windowBecameResponsive(window);
+        }
+    },
+    restartAnimation: function (window) {
+        "use strict";
+        if (!window || !window.unresponsive) {
+            return;
+        }
+        frozenAppEffect.startAnimation(window, 1);
+    },
+    init: function () {
+        "use strict";
+
+        effects.windowAdded.connect(frozenAppEffect.windowAdded);
+        effects.windowClosed.connect(frozenAppEffect.windowClosed);
+        effects.windowMinimized.connect(frozenAppEffect.cancelAnimation);
+        effects.windowUnminimized.connect(frozenAppEffect.restartAnimation);
+        effects.windowUnresponsiveChanged.connect(frozenAppEffect.unresponsiveChanged);
+        effects['desktopChanged(int,int)'].connect(frozenAppEffect.desktopChanged);
+        effects.desktopPresenceChanged.connect(frozenAppEffect.cancelAnimation);
+        effects.desktopPresenceChanged.connect(frozenAppEffect.restartAnimation);
+
+        var windows = effects.stackingOrder;
+        for (var i = 0, length = windows.length; i < length; ++i) {
+            frozenAppEffect.restartAnimation(windows[i]);
+        }
+    }
+};
+frozenAppEffect.init();
diff --git a/effects/frozenapp/package/metadata.desktop b/effects/frozenapp/package/metadata.desktop
new file mode 100644
index 000000000..b69f074b2
--- /dev/null
+++ b/effects/frozenapp/package/metadata.desktop
@@ -0,0 +1,22 @@
+[Desktop Entry]
+Name=Desaturate Unresponsive Applications
+Icon=preferences-system-windows-effect-frozenapp
+Comment=Desaturate windows of unresponsive (frozen) applications
+
+Type=Service
+X-KDE-ServiceTypes=KWin/Effect,KCModule
+X-KDE-PluginInfo-Author=Kai Uwe Broulik
+X-KDE-PluginInfo-Email=kde@privat.broulik.de
+X-KDE-PluginInfo-Name=kwin4_effect_frozenapp
+X-KDE-PluginInfo-Version=1.0
+X-KDE-PluginInfo-Category=Appearance
+X-KDE-PluginInfo-Depends=
+X-KDE-PluginInfo-License=GPL
+X-KDE-PluginInfo-EnabledByDefault=true
+X-KDE-Ordering=60
+X-Plasma-API=javascript
+X-Plasma-MainScript=code/main.js
+X-KDE-PluginKeyword=kwin4_effect_frozenapp
+X-KDE-Library=kcm_kwin4_genericscripted
+X-KDE-ParentComponents=kwin4_effect_frozen
+X-KWin-Config-TranslationDomain=kwin_effects
diff --git a/libkwineffects/kwineffects.cpp b/libkwineffects/kwineffects.cpp
index 560d3e4a4..fdcae25da 100644
--- a/libkwineffects/kwineffects.cpp
+++ b/libkwineffects/kwineffects.cpp
@@ -1,1882 +1,1883 @@
 /********************************************************************
  KWin - the KDE window manager
  This file is part of the KDE project.
 
 Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
 Copyright (C) 2009 Lucas Murray <lmurray@undefinedfire.com>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 
 #include "kwineffects.h"
 
 #include "config-kwin.h"
 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
 #include "kwinxrenderutils.h"
 #endif
 
 #include <qmath.h>
 #include <QVariant>
 #include <QList>
 #include <QTimeLine>
 #include <QtGui/QFontMetrics>
 #include <QtGui/QPainter>
 #include <QtGui/QPixmap>
 #include <QtGui/QVector2D>
 #include <QGraphicsRotation>
 #include <QGraphicsScale>
 
 #include <ksharedconfig.h>
 #include <kconfiggroup.h>
 
 #include <assert.h>
 
 #include <KWayland/Server/surface_interface.h>
 
 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
 #include <xcb/xfixes.h>
 #endif
 
 #if defined(__GNUC__)
 #  define KWIN_ALIGN(n) __attribute((aligned(n)))
 #  if defined(__SSE2__)
 #    define HAVE_SSE2
 #  endif
 #elif defined(__INTEL_COMPILER)
 #  define KWIN_ALIGN(n) __declspec(align(n))
 #  define HAVE_SSE2
 #else
 #  define KWIN_ALIGN(n)
 #endif
 
 #ifdef HAVE_SSE2
 #  include <emmintrin.h>
 #endif
 
 
 namespace KWin
 {
 
 void WindowPrePaintData::setTranslucent()
 {
     mask |= Effect::PAINT_WINDOW_TRANSLUCENT;
     mask &= ~Effect::PAINT_WINDOW_OPAQUE;
     clip = QRegion(); // cannot clip, will be transparent
 }
 
 void WindowPrePaintData::setTransformed()
 {
     mask |= Effect::PAINT_WINDOW_TRANSFORMED;
 }
 
 class PaintDataPrivate {
 public:
     QGraphicsScale scale;
     QVector3D translation;
     QGraphicsRotation rotation;
 };
 
 PaintData::PaintData()
     : d(new PaintDataPrivate())
 {
 }
 
 PaintData::~PaintData()
 {
     delete d;
 }
 
 qreal PaintData::xScale() const
 {
     return d->scale.xScale();
 }
 
 qreal PaintData::yScale() const
 {
     return d->scale.yScale();
 }
 
 qreal PaintData::zScale() const
 {
     return d->scale.zScale();
 }
 
 void PaintData::setScale(const QVector2D &scale)
 {
     d->scale.setXScale(scale.x());
     d->scale.setYScale(scale.y());
 }
 
 void PaintData::setScale(const QVector3D &scale)
 {
     d->scale.setXScale(scale.x());
     d->scale.setYScale(scale.y());
     d->scale.setZScale(scale.z());
 }
 
 void PaintData::setXScale(qreal scale)
 {
     d->scale.setXScale(scale);
 }
 
 void PaintData::setYScale(qreal scale)
 {
     d->scale.setYScale(scale);
 }
 
 void PaintData::setZScale(qreal scale)
 {
     d->scale.setZScale(scale);
 }
 
 const QGraphicsScale &PaintData::scale() const
 {
     return d->scale;
 }
 
 void PaintData::setXTranslation(qreal translate)
 {
     d->translation.setX(translate);
 }
 
 void PaintData::setYTranslation(qreal translate)
 {
     d->translation.setY(translate);
 }
 
 void PaintData::setZTranslation(qreal translate)
 {
     d->translation.setZ(translate);
 }
 
 void PaintData::translate(qreal x, qreal y, qreal z)
 {
     translate(QVector3D(x, y, z));
 }
 
 void PaintData::translate(const QVector3D &t)
 {
     d->translation += t;
 }
 
 qreal PaintData::xTranslation() const
 {
     return d->translation.x();
 }
 
 qreal PaintData::yTranslation() const
 {
     return d->translation.y();
 }
 
 qreal PaintData::zTranslation() const
 {
     return d->translation.z();
 }
 
 const QVector3D &PaintData::translation() const
 {
     return d->translation;
 }
 
 qreal PaintData::rotationAngle() const
 {
     return d->rotation.angle();
 }
 
 QVector3D PaintData::rotationAxis() const
 {
     return d->rotation.axis();
 }
 
 QVector3D PaintData::rotationOrigin() const
 {
     return d->rotation.origin();
 }
 
 void PaintData::setRotationAngle(qreal angle)
 {
     d->rotation.setAngle(angle);
 }
 
 void PaintData::setRotationAxis(Qt::Axis axis)
 {
     d->rotation.setAxis(axis);
 }
 
 void PaintData::setRotationAxis(const QVector3D &axis)
 {
     d->rotation.setAxis(axis);
 }
 
 void PaintData::setRotationOrigin(const QVector3D &origin)
 {
     d->rotation.setOrigin(origin);
 }
 
 class WindowPaintDataPrivate {
 public:
     qreal opacity;
     qreal saturation;
     qreal brightness;
     int screen;
     qreal crossFadeProgress;
     QMatrix4x4 pMatrix;
     QMatrix4x4 mvMatrix;
     QMatrix4x4 screenProjectionMatrix;
 };
 
 WindowPaintData::WindowPaintData(EffectWindow *w)
     : WindowPaintData(w, QMatrix4x4())
 {
 }
 
 WindowPaintData::WindowPaintData(EffectWindow* w, const QMatrix4x4 &screenProjectionMatrix)
     : PaintData()
     , shader(nullptr)
     , d(new WindowPaintDataPrivate())
 {
     d->screenProjectionMatrix = screenProjectionMatrix;
     quads = w->buildQuads();
     setOpacity(w->opacity());
     setSaturation(1.0);
     setBrightness(1.0);
     setScreen(0);
     setCrossFadeProgress(1.0);
 }
 
 WindowPaintData::WindowPaintData(const WindowPaintData &other)
     : PaintData()
     , quads(other.quads)
     , shader(other.shader)
     , d(new WindowPaintDataPrivate())
 {
     setXScale(other.xScale());
     setYScale(other.yScale());
     setZScale(other.zScale());
     translate(other.translation());
     setRotationOrigin(other.rotationOrigin());
     setRotationAxis(other.rotationAxis());
     setRotationAngle(other.rotationAngle());
     setOpacity(other.opacity());
     setSaturation(other.saturation());
     setBrightness(other.brightness());
     setScreen(other.screen());
     setCrossFadeProgress(other.crossFadeProgress());
     setProjectionMatrix(other.projectionMatrix());
     setModelViewMatrix(other.modelViewMatrix());
     d->screenProjectionMatrix = other.d->screenProjectionMatrix;
 }
 
 WindowPaintData::~WindowPaintData()
 {
     delete d;
 }
 
 qreal WindowPaintData::opacity() const
 {
     return d->opacity;
 }
 
 qreal WindowPaintData::saturation() const
 {
     return d->saturation;
 }
 
 qreal WindowPaintData::brightness() const
 {
     return d->brightness;
 }
 
 int WindowPaintData::screen() const
 {
     return d->screen;
 }
 
 void WindowPaintData::setOpacity(qreal opacity)
 {
     d->opacity = opacity;
 }
 
 void WindowPaintData::setSaturation(qreal saturation) const
 {
     d->saturation = saturation;
 }
 
 void WindowPaintData::setBrightness(qreal brightness)
 {
     d->brightness = brightness;
 }
 
 void WindowPaintData::setScreen(int screen) const
 {
     d->screen = screen;
 }
 
 qreal WindowPaintData::crossFadeProgress() const
 {
     return d->crossFadeProgress;
 }
 
 void WindowPaintData::setCrossFadeProgress(qreal factor)
 {
     d->crossFadeProgress = qBound(qreal(0.0), factor, qreal(1.0));
 }
 
 qreal WindowPaintData::multiplyOpacity(qreal factor)
 {
     d->opacity *= factor;
     return d->opacity;
 }
 
 qreal WindowPaintData::multiplySaturation(qreal factor)
 {
     d->saturation *= factor;
     return d->saturation;
 }
 
 qreal WindowPaintData::multiplyBrightness(qreal factor)
 {
     d->brightness *= factor;
     return d->brightness;
 }
 
 void WindowPaintData::setProjectionMatrix(const QMatrix4x4 &matrix)
 {
     d->pMatrix = matrix;
 }
 
 QMatrix4x4 WindowPaintData::projectionMatrix() const
 {
     return d->pMatrix;
 }
 
 QMatrix4x4 &WindowPaintData::rprojectionMatrix()
 {
     return d->pMatrix;
 }
 
 void WindowPaintData::setModelViewMatrix(const QMatrix4x4 &matrix)
 {
     d->mvMatrix = matrix;
 }
 
 QMatrix4x4 WindowPaintData::modelViewMatrix() const
 {
     return d->mvMatrix;
 }
 
 QMatrix4x4 &WindowPaintData::rmodelViewMatrix()
 {
     return d->mvMatrix;
 }
 
 WindowPaintData &WindowPaintData::operator*=(qreal scale)
 {
     this->setXScale(this->xScale() * scale);
     this->setYScale(this->yScale() * scale);
     this->setZScale(this->zScale() * scale);
     return *this;
 }
 
 WindowPaintData &WindowPaintData::operator*=(const QVector2D &scale)
 {
     this->setXScale(this->xScale() * scale.x());
     this->setYScale(this->yScale() * scale.y());
     return *this;
 }
 
 WindowPaintData &WindowPaintData::operator*=(const QVector3D &scale)
 {
     this->setXScale(this->xScale() * scale.x());
     this->setYScale(this->yScale() * scale.y());
     this->setZScale(this->zScale() * scale.z());
     return *this;
 }
 
 WindowPaintData &WindowPaintData::operator+=(const QPointF &translation)
 {
     return this->operator+=(QVector3D(translation));
 }
 
 WindowPaintData &WindowPaintData::operator+=(const QPoint &translation)
 {
     return this->operator+=(QVector3D(translation));
 }
 
 WindowPaintData &WindowPaintData::operator+=(const QVector2D &translation)
 {
     return this->operator+=(QVector3D(translation));
 }
 
 WindowPaintData &WindowPaintData::operator+=(const QVector3D &translation)
 {
     translate(translation);
     return *this;
 }
 
 QMatrix4x4 WindowPaintData::screenProjectionMatrix() const
 {
     return d->screenProjectionMatrix;
 }
 
 class ScreenPaintData::Private
 {
 public:
     QMatrix4x4 projectionMatrix;
     QRect outputGeometry;
 };
 
 ScreenPaintData::ScreenPaintData()
     : PaintData()
     , d(new Private())
 {
 }
 
 ScreenPaintData::ScreenPaintData(const QMatrix4x4 &projectionMatrix, const QRect &outputGeometry)
     : PaintData()
     , d(new Private())
 {
     d->projectionMatrix = projectionMatrix;
     d->outputGeometry = outputGeometry;
 }
 
 ScreenPaintData::~ScreenPaintData() = default;
 
 ScreenPaintData::ScreenPaintData(const ScreenPaintData &other)
     : PaintData()
     , d(new Private())
 {
     translate(other.translation());
     setXScale(other.xScale());
     setYScale(other.yScale());
     setZScale(other.zScale());
     setRotationOrigin(other.rotationOrigin());
     setRotationAxis(other.rotationAxis());
     setRotationAngle(other.rotationAngle());
     d->projectionMatrix = other.d->projectionMatrix;
     d->outputGeometry = other.d->outputGeometry;
 }
 
 ScreenPaintData &ScreenPaintData::operator=(const ScreenPaintData &rhs)
 {
     setXScale(rhs.xScale());
     setYScale(rhs.yScale());
     setZScale(rhs.zScale());
     setXTranslation(rhs.xTranslation());
     setYTranslation(rhs.yTranslation());
     setZTranslation(rhs.zTranslation());
     setRotationOrigin(rhs.rotationOrigin());
     setRotationAxis(rhs.rotationAxis());
     setRotationAngle(rhs.rotationAngle());
     d->projectionMatrix = rhs.d->projectionMatrix;
     d->outputGeometry = rhs.d->outputGeometry;
     return *this;
 }
 
 ScreenPaintData &ScreenPaintData::operator*=(qreal scale)
 {
     setXScale(this->xScale() * scale);
     setYScale(this->yScale() * scale);
     setZScale(this->zScale() * scale);
     return *this;
 }
 
 ScreenPaintData &ScreenPaintData::operator*=(const QVector2D &scale)
 {
     setXScale(this->xScale() * scale.x());
     setYScale(this->yScale() * scale.y());
     return *this;
 }
 
 ScreenPaintData &ScreenPaintData::operator*=(const QVector3D &scale)
 {
     setXScale(this->xScale() * scale.x());
     setYScale(this->yScale() * scale.y());
     setZScale(this->zScale() * scale.z());
     return *this;
 }
 
 ScreenPaintData &ScreenPaintData::operator+=(const QPointF &translation)
 {
     return this->operator+=(QVector3D(translation));
 }
 
 ScreenPaintData &ScreenPaintData::operator+=(const QPoint &translation)
 {
     return this->operator+=(QVector3D(translation));
 }
 
 ScreenPaintData &ScreenPaintData::operator+=(const QVector2D &translation)
 {
     return this->operator+=(QVector3D(translation));
 }
 
 ScreenPaintData &ScreenPaintData::operator+=(const QVector3D &translation)
 {
     translate(translation);
     return *this;
 }
 
 QMatrix4x4 ScreenPaintData::projectionMatrix() const
 {
     return d->projectionMatrix;
 }
 
 QRect ScreenPaintData::outputGeometry() const
 {
     return d->outputGeometry;
 }
 
 //****************************************
 // Effect
 //****************************************
 
 Effect::Effect()
 {
 }
 
 Effect::~Effect()
 {
 }
 
 void Effect::reconfigure(ReconfigureFlags)
 {
 }
 
 void* Effect::proxy()
 {
     return nullptr;
 }
 
 void Effect::windowInputMouseEvent(QEvent*)
 {
 }
 
 void Effect::grabbedKeyboardEvent(QKeyEvent*)
 {
 }
 
 bool Effect::borderActivated(ElectricBorder)
 {
     return false;
 }
 
 void Effect::prePaintScreen(ScreenPrePaintData& data, int time)
 {
     effects->prePaintScreen(data, time);
 }
 
 void Effect::paintScreen(int mask, QRegion region, ScreenPaintData& data)
 {
     effects->paintScreen(mask, region, data);
 }
 
 void Effect::postPaintScreen()
 {
     effects->postPaintScreen();
 }
 
 void Effect::prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time)
 {
     effects->prePaintWindow(w, data, time);
 }
 
 void Effect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
 {
     effects->paintWindow(w, mask, region, data);
 }
 
 void Effect::postPaintWindow(EffectWindow* w)
 {
     effects->postPaintWindow(w);
 }
 
 void Effect::paintEffectFrame(KWin::EffectFrame* frame, QRegion region, double opacity, double frameOpacity)
 {
     effects->paintEffectFrame(frame, region, opacity, frameOpacity);
 }
 
 bool Effect::provides(Feature)
 {
     return false;
 }
 
 bool Effect::isActive() const
 {
     return true;
 }
 
 QString Effect::debug(const QString &) const
 {
     return QString();
 }
 
 void Effect::drawWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
 {
     effects->drawWindow(w, mask, region, data);
 }
 
 void Effect::buildQuads(EffectWindow* w, WindowQuadList& quadList)
 {
     effects->buildQuads(w, quadList);
 }
 
 void Effect::setPositionTransformations(WindowPaintData& data, QRect& region, EffectWindow* w,
                                         const QRect& r, Qt::AspectRatioMode aspect)
 {
     QSize size = w->size();
     size.scale(r.size(), aspect);
     data.setXScale(size.width() / double(w->width()));
     data.setYScale(size.height() / double(w->height()));
     int width = int(w->width() * data.xScale());
     int height = int(w->height() * data.yScale());
     int x = r.x() + (r.width() - width) / 2;
     int y = r.y() + (r.height() - height) / 2;
     region = QRect(x, y, width, height);
     data.setXTranslation(x - w->x());
     data.setYTranslation(y - w->y());
 }
 
 QPoint Effect::cursorPos()
 {
     return effects->cursorPos();
 }
 
 double Effect::animationTime(const KConfigGroup& cfg, const QString& key, int defaultTime)
 {
     int time = cfg.readEntry(key, 0);
     return time != 0 ? time : qMax(defaultTime * effects->animationTimeFactor(), 1.);
 }
 
 double Effect::animationTime(int defaultTime)
 {
     // at least 1ms, otherwise 0ms times can break some things
     return qMax(defaultTime * effects->animationTimeFactor(), 1.);
 }
 
 int Effect::requestedEffectChainPosition() const
 {
     return 0;
 }
 
 xcb_connection_t *Effect::xcbConnection() const
 {
     return effects->xcbConnection();
 }
 
 xcb_window_t Effect::x11RootWindow() const
 {
     return effects->x11RootWindow();
 }
 
 bool Effect::touchDown(quint32 id, const QPointF &pos, quint32 time)
 {
     Q_UNUSED(id)
     Q_UNUSED(pos)
     Q_UNUSED(time)
     return false;
 }
 
 bool Effect::touchMotion(quint32 id, const QPointF &pos, quint32 time)
 {
     Q_UNUSED(id)
     Q_UNUSED(pos)
     Q_UNUSED(time)
     return false;
 }
 
 bool Effect::touchUp(quint32 id, quint32 time)
 {
     Q_UNUSED(id)
     Q_UNUSED(time)
     return false;
 }
 
 bool Effect::perform(Feature feature, const QVariantList &arguments)
 {
     Q_UNUSED(feature)
     Q_UNUSED(arguments)
     return false;
 }
 
 //****************************************
 // EffectFactory
 //****************************************
 EffectPluginFactory::EffectPluginFactory()
 {
 }
 
 EffectPluginFactory::~EffectPluginFactory()
 {
 }
 
 bool EffectPluginFactory::enabledByDefault() const
 {
     return true;
 }
 
 bool EffectPluginFactory::isSupported() const
 {
     return true;
 }
 
 //****************************************
 // EffectsHandler
 //****************************************
 
 EffectsHandler::EffectsHandler(CompositingType type)
     : compositing_type(type)
 {
     if (compositing_type == NoCompositing)
         return;
     KWin::effects = this;
 }
 
 EffectsHandler::~EffectsHandler()
 {
     // All effects should already be unloaded by Impl dtor
     assert(loaded_effects.count() == 0);
 }
 
 CompositingType EffectsHandler::compositingType() const
 {
     return compositing_type;
 }
 
 bool EffectsHandler::isOpenGLCompositing() const
 {
     return compositing_type & OpenGLCompositing;
 }
 
 EffectsHandler* effects = nullptr;
 
 
 //****************************************
 // EffectWindow
 //****************************************
 
 EffectWindow::EffectWindow(QObject *parent)
     : QObject(parent)
 {
 }
 
 EffectWindow::~EffectWindow()
 {
 }
 
 #define WINDOW_HELPER( rettype, prototype, propertyname ) \
     rettype EffectWindow::prototype ( ) const \
     { \
         return parent()->property( propertyname ).value< rettype >(); \
     }
 
 WINDOW_HELPER(double, opacity, "opacity")
 WINDOW_HELPER(bool, hasAlpha, "alpha")
 WINDOW_HELPER(int, x, "x")
 WINDOW_HELPER(int, y, "y")
 WINDOW_HELPER(int, width, "width")
 WINDOW_HELPER(int, height, "height")
 WINDOW_HELPER(QPoint, pos, "pos")
 WINDOW_HELPER(QSize, size, "size")
 WINDOW_HELPER(int, screen, "screen")
 WINDOW_HELPER(QRect, geometry, "geometry")
 WINDOW_HELPER(QRect, expandedGeometry, "visibleRect")
 WINDOW_HELPER(QRect, rect, "rect")
 WINDOW_HELPER(int, desktop, "desktop")
 WINDOW_HELPER(bool, isDesktop, "desktopWindow")
 WINDOW_HELPER(bool, isDock, "dock")
 WINDOW_HELPER(bool, isToolbar, "toolbar")
 WINDOW_HELPER(bool, isMenu, "menu")
 WINDOW_HELPER(bool, isNormalWindow, "normalWindow")
 WINDOW_HELPER(bool, isDialog, "dialog")
 WINDOW_HELPER(bool, isSplash, "splash")
 WINDOW_HELPER(bool, isUtility, "utility")
 WINDOW_HELPER(bool, isDropdownMenu, "dropdownMenu")
 WINDOW_HELPER(bool, isPopupMenu, "popupMenu")
 WINDOW_HELPER(bool, isTooltip, "tooltip")
 WINDOW_HELPER(bool, isNotification, "notification")
 WINDOW_HELPER(bool, isOnScreenDisplay, "onScreenDisplay")
 WINDOW_HELPER(bool, isComboBox, "comboBox")
 WINDOW_HELPER(bool, isDNDIcon, "dndIcon")
 WINDOW_HELPER(bool, isManaged, "managed")
 WINDOW_HELPER(bool, isDeleted, "deleted")
 WINDOW_HELPER(bool, hasOwnShape, "shaped")
 WINDOW_HELPER(QString, windowRole, "windowRole")
 WINDOW_HELPER(QStringList, activities, "activities")
 WINDOW_HELPER(bool, skipsCloseAnimation, "skipsCloseAnimation")
 WINDOW_HELPER(KWayland::Server::SurfaceInterface *, surface, "surface")
 
 QString EffectWindow::windowClass() const
 {
     return parent()->property("resourceName").toString() + QLatin1Char(' ') + parent()->property("resourceClass").toString();
 }
 
 QRect EffectWindow::contentsRect() const
 {
     return QRect(parent()->property("clientPos").toPoint(), parent()->property("clientSize").toSize());
 }
 
 NET::WindowType EffectWindow::windowType() const
 {
     return static_cast<NET::WindowType>(parent()->property("windowType").toInt());
 }
 
 bool EffectWindow::isOnActivity(QString activity) const
 {
     const QStringList activities = parent()->property("activities").toStringList();
     return activities.isEmpty() || activities.contains(activity);
 }
 
 bool EffectWindow::isOnAllActivities() const
 {
     return parent()->property("activities").toStringList().isEmpty();
 }
 
 #undef WINDOW_HELPER
 
 #define WINDOW_HELPER_DEFAULT( rettype, prototype, propertyname, defaultValue ) \
     rettype EffectWindow::prototype ( ) const \
     { \
         const QVariant variant = parent()->property( propertyname ); \
         if (!variant.isValid()) { \
             return defaultValue; \
         } \
         return variant.value< rettype >(); \
     }
 
 WINDOW_HELPER_DEFAULT(bool, isMinimized, "minimized", false)
 WINDOW_HELPER_DEFAULT(bool, isMovable, "moveable", false)
 WINDOW_HELPER_DEFAULT(bool, isMovableAcrossScreens, "moveableAcrossScreens", false)
 WINDOW_HELPER_DEFAULT(QString, caption, "caption", QString())
 WINDOW_HELPER_DEFAULT(bool, keepAbove, "keepAbove", true)
 WINDOW_HELPER_DEFAULT(bool, isModal, "modal", false)
 WINDOW_HELPER_DEFAULT(QSize, basicUnit, "basicUnit", QSize(1, 1))
 WINDOW_HELPER_DEFAULT(bool, isUserMove, "move", false)
 WINDOW_HELPER_DEFAULT(bool, isUserResize, "resize", false)
 WINDOW_HELPER_DEFAULT(QRect, iconGeometry, "iconGeometry", QRect())
 WINDOW_HELPER_DEFAULT(bool, isSpecialWindow, "specialWindow", true)
 WINDOW_HELPER_DEFAULT(bool, acceptsFocus, "wantsInput", true) // We don't actually know...
 WINDOW_HELPER_DEFAULT(QIcon, icon, "icon", QIcon())
 WINDOW_HELPER_DEFAULT(bool, isSkipSwitcher, "skipSwitcher", false)
 WINDOW_HELPER_DEFAULT(bool, isCurrentTab, "isCurrentTab", true)
 WINDOW_HELPER_DEFAULT(bool, decorationHasAlpha, "decorationHasAlpha", false)
 WINDOW_HELPER_DEFAULT(bool, isFullScreen, "fullScreen", false)
+WINDOW_HELPER_DEFAULT(bool, isUnresponsive, "unresponsive", false)
 
 #undef WINDOW_HELPER_DEFAULT
 
 #define WINDOW_HELPER_SETTER( prototype, propertyname, args, value ) \
     void EffectWindow::prototype ( args ) \
     {\
         const QVariant variant = parent()->property( propertyname ); \
         if (variant.isValid()) { \
             parent()->setProperty( propertyname, value ); \
         } \
     }
 
 WINDOW_HELPER_SETTER(minimize, "minimized",,true)
 WINDOW_HELPER_SETTER(unminimize, "minimized",,false)
 
 #undef WINDOW_HELPER_SETTER
 
 void EffectWindow::setMinimized(bool min)
 {
     if (min) {
         minimize();
     } else {
         unminimize();
     }
 }
 
 void EffectWindow::closeWindow() const
 {
     QMetaObject::invokeMethod(parent(), "closeWindow");
 }
 
 void EffectWindow::addRepaint(int x, int y, int w, int h)
 {
     QMetaObject::invokeMethod(parent(), "addRepaint", Q_ARG(int, x), Q_ARG(int, y), Q_ARG(int, w), Q_ARG(int, h));
 }
 
 void EffectWindow::addRepaint(const QRect &r)
 {
     QMetaObject::invokeMethod(parent(), "addRepaint", Q_ARG(const QRect&, r));
 }
 
 void EffectWindow::addRepaintFull()
 {
     QMetaObject::invokeMethod(parent(), "addRepaintFull");
 }
 
 void EffectWindow::addLayerRepaint(int x, int y, int w, int h)
 {
     QMetaObject::invokeMethod(parent(), "addLayerRepaint", Q_ARG(int, x), Q_ARG(int, y), Q_ARG(int, w), Q_ARG(int, h));
 }
 
 void EffectWindow::addLayerRepaint(const QRect &r)
 {
     QMetaObject::invokeMethod(parent(), "addLayerRepaint", Q_ARG(const QRect&, r));
 }
 
 bool EffectWindow::isOnCurrentActivity() const
 {
     return isOnActivity(effects->currentActivity());
 }
 
 bool EffectWindow::isOnCurrentDesktop() const
 {
     return isOnDesktop(effects->currentDesktop());
 }
 
 bool EffectWindow::isOnDesktop(int d) const
 {
     return desktop() == d || isOnAllDesktops();
 }
 
 bool EffectWindow::isOnAllDesktops() const
 {
     return desktop() == NET::OnAllDesktops;
 }
 
 bool EffectWindow::hasDecoration() const
 {
     return contentsRect() != QRect(0, 0, width(), height());
 }
 
 bool EffectWindow::isVisible() const
 {
     return !isMinimized()
            && isOnCurrentDesktop()
            && isOnCurrentActivity();
 }
 
 
 //****************************************
 // EffectWindowGroup
 //****************************************
 
 EffectWindowGroup::~EffectWindowGroup()
 {
 }
 
 /***************************************************************
  WindowQuad
 ***************************************************************/
 
 WindowQuad WindowQuad::makeSubQuad(double x1, double y1, double x2, double y2) const
 {
     assert(x1 < x2 && y1 < y2 && x1 >= left() && x2 <= right() && y1 >= top() && y2 <= bottom());
 #ifndef NDEBUG
     if (isTransformed())
         qFatal("Splitting quads is allowed only in pre-paint calls!");
 #endif
     WindowQuad ret(*this);
     // vertices are clockwise starting from topleft
     ret.verts[ 0 ].px = x1;
     ret.verts[ 3 ].px = x1;
     ret.verts[ 1 ].px = x2;
     ret.verts[ 2 ].px = x2;
     ret.verts[ 0 ].py = y1;
     ret.verts[ 1 ].py = y1;
     ret.verts[ 2 ].py = y2;
     ret.verts[ 3 ].py = y2;
     // original x/y are supposed to be the same, no transforming is done here
     ret.verts[ 0 ].ox = x1;
     ret.verts[ 3 ].ox = x1;
     ret.verts[ 1 ].ox = x2;
     ret.verts[ 2 ].ox = x2;
     ret.verts[ 0 ].oy = y1;
     ret.verts[ 1 ].oy = y1;
     ret.verts[ 2 ].oy = y2;
     ret.verts[ 3 ].oy = y2;
 
     const double my_u0 = verts[0].tx;
     const double my_u1 = verts[2].tx;
     const double my_v0 = verts[0].ty;
     const double my_v1 = verts[2].ty;
 
     const double width  = right() - left();
     const double height = bottom() - top();
 
     const double texWidth  = my_u1 - my_u0;
     const double texHeight = my_v1 - my_v0;
 
     if (!uvAxisSwapped()) {
         const double u0 = (x1 - left()) / width  * texWidth  + my_u0;
         const double u1 = (x2 - left()) / width  * texWidth  + my_u0;
         const double v0 = (y1 - top())  / height * texHeight + my_v0;
         const double v1 = (y2 - top())  / height * texHeight + my_v0;
 
         ret.verts[0].tx = u0;
         ret.verts[3].tx = u0;
         ret.verts[1].tx = u1;
         ret.verts[2].tx = u1;
         ret.verts[0].ty = v0;
         ret.verts[1].ty = v0;
         ret.verts[2].ty = v1;
         ret.verts[3].ty = v1;
     } else {
         const double u0 = (y1 - top())  / height * texWidth  + my_u0;
         const double u1 = (y2 - top())  / height * texWidth  + my_u0;
         const double v0 = (x1 - left()) / width  * texHeight + my_v0;
         const double v1 = (x2 - left()) / width  * texHeight + my_v0;
 
         ret.verts[0].tx = u0;
         ret.verts[1].tx = u0;
         ret.verts[2].tx = u1;
         ret.verts[3].tx = u1;
         ret.verts[0].ty = v0;
         ret.verts[3].ty = v0;
         ret.verts[1].ty = v1;
         ret.verts[2].ty = v1;
     }
 
     ret.setUVAxisSwapped(uvAxisSwapped());
 
     return ret;
 }
 
 bool WindowQuad::smoothNeeded() const
 {
     // smoothing is needed if the width or height of the quad does not match the original size
     double width = verts[ 1 ].ox - verts[ 0 ].ox;
     double height = verts[ 2 ].oy - verts[ 1 ].oy;
     return(verts[ 1 ].px - verts[ 0 ].px != width || verts[ 2 ].px - verts[ 3 ].px != width
            || verts[ 2 ].py - verts[ 1 ].py != height || verts[ 3 ].py - verts[ 0 ].py != height);
 }
 
 /***************************************************************
  WindowQuadList
 ***************************************************************/
 
 WindowQuadList WindowQuadList::splitAtX(double x) const
 {
     WindowQuadList ret;
     foreach (const WindowQuad & quad, *this) {
 #ifndef NDEBUG
         if (quad.isTransformed())
             qFatal("Splitting quads is allowed only in pre-paint calls!");
 #endif
         bool wholeleft = true;
         bool wholeright = true;
         for (int i = 0;
                 i < 4;
                 ++i) {
             if (quad[ i ].x() < x)
                 wholeright = false;
             if (quad[ i ].x() > x)
                 wholeleft = false;
         }
         if (wholeleft || wholeright) { // is whole in one split part
             ret.append(quad);
             continue;
         }
         if (quad.top() == quad.bottom() || quad.left() == quad.right()) { // quad has no size
             ret.append(quad);
             continue;
         }
         ret.append(quad.makeSubQuad(quad.left(), quad.top(), x, quad.bottom()));
         ret.append(quad.makeSubQuad(x, quad.top(), quad.right(), quad.bottom()));
     }
     return ret;
 }
 
 WindowQuadList WindowQuadList::splitAtY(double y) const
 {
     WindowQuadList ret;
     foreach (const WindowQuad & quad, *this) {
 #ifndef NDEBUG
         if (quad.isTransformed())
             qFatal("Splitting quads is allowed only in pre-paint calls!");
 #endif
         bool wholetop = true;
         bool wholebottom = true;
         for (int i = 0;
                 i < 4;
                 ++i) {
             if (quad[ i ].y() < y)
                 wholebottom = false;
             if (quad[ i ].y() > y)
                 wholetop = false;
         }
         if (wholetop || wholebottom) { // is whole in one split part
             ret.append(quad);
             continue;
         }
         if (quad.top() == quad.bottom() || quad.left() == quad.right()) { // quad has no size
             ret.append(quad);
             continue;
         }
         ret.append(quad.makeSubQuad(quad.left(), quad.top(), quad.right(), y));
         ret.append(quad.makeSubQuad(quad.left(), y, quad.right(), quad.bottom()));
     }
     return ret;
 }
 
 WindowQuadList WindowQuadList::makeGrid(int maxQuadSize) const
 {
     if (empty())
         return *this;
 
     // Find the bounding rectangle
     double left   = first().left();
     double right  = first().right();
     double top    = first().top();
     double bottom = first().bottom();
 
     foreach (const WindowQuad &quad, *this) {
 #ifndef NDEBUG
         if (quad.isTransformed())
             qFatal("Splitting quads is allowed only in pre-paint calls!");
 #endif
         left   = qMin(left,   quad.left());
         right  = qMax(right,  quad.right());
         top    = qMin(top,    quad.top());
         bottom = qMax(bottom, quad.bottom());
     }
 
     WindowQuadList ret;
 
     foreach (const WindowQuad &quad, *this) {
         const double quadLeft   = quad.left();
         const double quadRight  = quad.right();
         const double quadTop    = quad.top();
         const double quadBottom = quad.bottom();
 
         // Compute the top-left corner of the first intersecting grid cell
         const double xBegin = left + qFloor((quadLeft - left) / maxQuadSize) * maxQuadSize;
         const double yBegin = top  + qFloor((quadTop  - top)  / maxQuadSize) * maxQuadSize;
 
         // Loop over all intersecting cells and add sub-quads
         for (double y = yBegin; y < quadBottom; y += maxQuadSize) {
             const double y0 = qMax(y, quadTop);
             const double y1 = qMin(quadBottom, y + maxQuadSize);
 
             for (double x = xBegin; x < quadRight; x += maxQuadSize) {
                 const double x0 = qMax(x, quadLeft);
                 const double x1 = qMin(quadRight, x + maxQuadSize);
 
                 ret.append(quad.makeSubQuad(x0, y0, x1, y1));
             }
         }
     }
 
     return ret;
 }
 
 WindowQuadList WindowQuadList::makeRegularGrid(int xSubdivisions, int ySubdivisions) const
 {
     if (empty())
         return *this;
 
     // Find the bounding rectangle
     double left   = first().left();
     double right  = first().right();
     double top    = first().top();
     double bottom = first().bottom();
 
     foreach (const WindowQuad &quad, *this) {
 #ifndef NDEBUG
         if (quad.isTransformed())
             qFatal("Splitting quads is allowed only in pre-paint calls!");
 #endif
         left   = qMin(left,   quad.left());
         right  = qMax(right,  quad.right());
         top    = qMin(top,    quad.top());
         bottom = qMax(bottom, quad.bottom());
     }
 
     double xIncrement = (right - left) / xSubdivisions;
     double yIncrement = (bottom - top) / ySubdivisions;
 
     WindowQuadList ret;
 
     foreach (const WindowQuad &quad, *this) {
         const double quadLeft   = quad.left();
         const double quadRight  = quad.right();
         const double quadTop    = quad.top();
         const double quadBottom = quad.bottom();
 
         // Compute the top-left corner of the first intersecting grid cell
         const double xBegin = left + qFloor((quadLeft - left) / xIncrement) * xIncrement;
         const double yBegin = top  + qFloor((quadTop  - top)  / yIncrement) * yIncrement;
 
         // Loop over all intersecting cells and add sub-quads
         for (double y = yBegin; y < quadBottom; y += yIncrement) {
             const double y0 = qMax(y, quadTop);
             const double y1 = qMin(quadBottom, y + yIncrement);
 
             for (double x = xBegin; x < quadRight; x += xIncrement) {
                 const double x0 = qMax(x, quadLeft);
                 const double x1 = qMin(quadRight, x + xIncrement);
 
                 ret.append(quad.makeSubQuad(x0, y0, x1, y1));
             }
         }
     }
 
     return ret;
 }
 
 #ifndef GL_TRIANGLES
 #  define GL_TRIANGLES      0x0004
 #endif
 
 #ifndef GL_QUADS
 #  define GL_QUADS          0x0007
 #endif
 
 void WindowQuadList::makeInterleavedArrays(unsigned int type, GLVertex2D *vertices, const QMatrix4x4 &textureMatrix) const
 {
     // Since we know that the texture matrix just scales and translates
     // we can use this information to optimize the transformation
     const QVector2D coeff(textureMatrix(0, 0), textureMatrix(1, 1));
     const QVector2D offset(textureMatrix(0, 3), textureMatrix(1, 3));
 
     GLVertex2D *vertex = vertices;
 
     assert(type == GL_QUADS || type == GL_TRIANGLES);
 
     switch (type)
     {
     case GL_QUADS:
 #ifdef HAVE_SSE2
         if (!(intptr_t(vertex) & 0xf)) {
             for (int i = 0; i < count(); i++) {
                 const WindowQuad &quad = at(i);
                 KWIN_ALIGN(16) GLVertex2D v[4];
 
                 for (int j = 0; j < 4; j++) {
                     const WindowVertex &wv = quad[j];
 
                     v[j].position = QVector2D(wv.x(), wv.y());
                     v[j].texcoord = QVector2D(wv.u(), wv.v()) * coeff + offset;
                 }
 
                 const __m128i *srcP = (const __m128i *) &v;
                 __m128i *dstP = (__m128i *) vertex;
 
                 _mm_stream_si128(&dstP[0], _mm_load_si128(&srcP[0])); // Top-left
                 _mm_stream_si128(&dstP[1], _mm_load_si128(&srcP[1])); // Top-right
                 _mm_stream_si128(&dstP[2], _mm_load_si128(&srcP[2])); // Bottom-right
                 _mm_stream_si128(&dstP[3], _mm_load_si128(&srcP[3])); // Bottom-left
 
                 vertex += 4;
             }
         } else
 #endif // HAVE_SSE2
         {
             for (int i = 0; i < count(); i++) {
                 const WindowQuad &quad = at(i);
 
                 for (int j = 0; j < 4; j++) {
                     const WindowVertex &wv = quad[j];
 
                     GLVertex2D v;
                     v.position = QVector2D(wv.x(), wv.y());
                     v.texcoord = QVector2D(wv.u(), wv.v()) * coeff + offset;
 
                     *(vertex++) = v;
                 }
             }
         }
         break;
 
     case GL_TRIANGLES:
 #ifdef HAVE_SSE2
         if (!(intptr_t(vertex) & 0xf)) {
             for (int i = 0; i < count(); i++) {
                 const WindowQuad &quad = at(i);
                 KWIN_ALIGN(16) GLVertex2D v[4];
 
                 for (int j = 0; j < 4; j++) {
                     const WindowVertex &wv = quad[j];
 
                     v[j].position = QVector2D(wv.x(), wv.y());
                     v[j].texcoord = QVector2D(wv.u(), wv.v()) * coeff + offset;
                 }
 
                 const __m128i *srcP = (const __m128i *) &v;
                 __m128i *dstP = (__m128i *) vertex;
 
                 __m128i src[4];
                 src[0] = _mm_load_si128(&srcP[0]); // Top-left
                 src[1] = _mm_load_si128(&srcP[1]); // Top-right
                 src[2] = _mm_load_si128(&srcP[2]); // Bottom-right
                 src[3] = _mm_load_si128(&srcP[3]); // Bottom-left
 
                 // First triangle
                 _mm_stream_si128(&dstP[0], src[1]); // Top-right
                 _mm_stream_si128(&dstP[1], src[0]); // Top-left
                 _mm_stream_si128(&dstP[2], src[3]); // Bottom-left
 
                 // Second triangle
                 _mm_stream_si128(&dstP[3], src[3]); // Bottom-left
                 _mm_stream_si128(&dstP[4], src[2]); // Bottom-right
                 _mm_stream_si128(&dstP[5], src[1]); // Top-right
 
                 vertex += 6;
             }
         } else
 #endif // HAVE_SSE2
         {
             for (int i = 0; i < count(); i++) {
                 const WindowQuad &quad = at(i);
                 GLVertex2D v[4]; // Four unique vertices / quad
 
                 for (int j = 0; j < 4; j++) {
                     const WindowVertex &wv = quad[j];
 
                     v[j].position = QVector2D(wv.x(), wv.y());
                     v[j].texcoord = QVector2D(wv.u(), wv.v()) * coeff + offset;
                 }
 
                 // First triangle
                 *(vertex++) = v[1]; // Top-right
                 *(vertex++) = v[0]; // Top-left
                 *(vertex++) = v[3]; // Bottom-left
 
                 // Second triangle
                 *(vertex++) = v[3]; // Bottom-left
                 *(vertex++) = v[2]; // Bottom-right
                 *(vertex++) = v[1]; // Top-right
             }
         }
         break;
 
     default:
         break;
     }
 }
 
 void WindowQuadList::makeArrays(float **vertices, float **texcoords, const QSizeF &size, bool yInverted) const
 {
     *vertices = new float[count() * 6 * 2];
     *texcoords = new float[count() * 6 * 2];
 
     float *vpos = *vertices;
     float *tpos = *texcoords;
 
      // Note: The positions in a WindowQuad are stored in clockwise order
     const int index[] = { 1, 0, 3, 3, 2, 1 };
 
     for (int i = 0; i < count(); i++) {
         const WindowQuad &quad = at(i);
 
         for (int j = 0; j < 6; j++) {
             const WindowVertex &wv = quad[index[j]];
 
             *vpos++ = wv.x();
             *vpos++ = wv.y();
 
             *tpos++ = wv.u() / size.width();
             *tpos++ = yInverted ? (wv.v() / size.height()) : (1.0 - wv.v() / size.height());
         }
     }
 }
 
 WindowQuadList WindowQuadList::select(WindowQuadType type) const
 {
     foreach (const WindowQuad & q, *this) {
         if (q.type() != type) { // something else than ones to select, make a copy and filter
             WindowQuadList ret;
             foreach (const WindowQuad & q, *this) {
                 if (q.type() == type)
                     ret.append(q);
             }
             return ret;
         }
     }
     return *this; // nothing to filter out
 }
 
 WindowQuadList WindowQuadList::filterOut(WindowQuadType type) const
 {
     foreach (const WindowQuad & q, *this) {
         if (q.type() == type) { // something to filter out, make a copy and filter
             WindowQuadList ret;
             foreach (const WindowQuad & q, *this) {
                 if (q.type() != type)
                     ret.append(q);
             }
             return ret;
         }
     }
     return *this; // nothing to filter out
 }
 
 bool WindowQuadList::smoothNeeded() const
 {
     foreach (const WindowQuad & q, *this)
     if (q.smoothNeeded())
         return true;
     return false;
 }
 
 bool WindowQuadList::isTransformed() const
 {
     foreach (const WindowQuad & q, *this)
     if (q.isTransformed())
         return true;
     return false;
 }
 
 /***************************************************************
  PaintClipper
 ***************************************************************/
 
 QStack< QRegion >* PaintClipper::areas = nullptr;
 
 PaintClipper::PaintClipper(const QRegion& allowed_area)
     : area(allowed_area)
 {
     push(area);
 }
 
 PaintClipper::~PaintClipper()
 {
     pop(area);
 }
 
 void PaintClipper::push(const QRegion& allowed_area)
 {
     if (allowed_area == infiniteRegion())  // don't push these
         return;
     if (areas == nullptr)
         areas = new QStack< QRegion >;
     areas->push(allowed_area);
 }
 
 void PaintClipper::pop(const QRegion& allowed_area)
 {
     if (allowed_area == infiniteRegion())
         return;
     Q_ASSERT(areas != nullptr);
     Q_ASSERT(areas->top() == allowed_area);
     areas->pop();
     if (areas->isEmpty()) {
         delete areas;
         areas = nullptr;
     }
 }
 
 bool PaintClipper::clip()
 {
     return areas != nullptr;
 }
 
 QRegion PaintClipper::paintArea()
 {
     assert(areas != nullptr);   // can be called only with clip() == true
     const QSize &s = effects->virtualScreenSize();
     QRegion ret = QRegion(0, 0, s.width(), s.height());
     foreach (const QRegion & r, *areas)
     ret &= r;
     return ret;
 }
 
 struct PaintClipper::Iterator::Data {
     Data() : index(0) {}
     int index;
     QVector< QRect > rects;
 };
 
 PaintClipper::Iterator::Iterator()
     : data(new Data)
 {
     if (clip() && effects->isOpenGLCompositing()) {
         data->rects = paintArea().rects();
         data->index = -1;
         next(); // move to the first one
     }
 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
     if (clip() && effects->compositingType() == XRenderCompositing) {
         XFixesRegion region(paintArea());
         xcb_xfixes_set_picture_clip_region(connection(), effects->xrenderBufferPicture(), region, 0, 0);
     }
 #endif
 }
 
 PaintClipper::Iterator::~Iterator()
 {
 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
     if (clip() && effects->compositingType() == XRenderCompositing)
         xcb_xfixes_set_picture_clip_region(connection(), effects->xrenderBufferPicture(), XCB_XFIXES_REGION_NONE, 0, 0);
 #endif
     delete data;
 }
 
 bool PaintClipper::Iterator::isDone()
 {
     if (!clip())
         return data->index == 1; // run once
     if (effects->isOpenGLCompositing())
         return data->index >= data->rects.count(); // run once per each area
 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
     if (effects->compositingType() == XRenderCompositing)
         return data->index == 1; // run once
 #endif
     abort();
 }
 
 void PaintClipper::Iterator::next()
 {
     data->index++;
 }
 
 QRect PaintClipper::Iterator::boundingRect() const
 {
     if (!clip())
         return infiniteRegion();
     if (effects->isOpenGLCompositing())
         return data->rects[ data->index ];
 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
     if (effects->compositingType() == XRenderCompositing)
         return paintArea().boundingRect();
 #endif
     abort();
     return infiniteRegion();
 }
 
 /***************************************************************
  Motion1D
 ***************************************************************/
 
 Motion1D::Motion1D(double initial, double strength, double smoothness)
     : Motion<double>(initial, strength, smoothness)
 {
 }
 
 Motion1D::Motion1D(const Motion1D &other)
     : Motion<double>(other)
 {
 }
 
 Motion1D::~Motion1D()
 {
 }
 
 /***************************************************************
  Motion2D
 ***************************************************************/
 
 Motion2D::Motion2D(QPointF initial, double strength, double smoothness)
     : Motion<QPointF>(initial, strength, smoothness)
 {
 }
 
 Motion2D::Motion2D(const Motion2D &other)
     : Motion<QPointF>(other)
 {
 }
 
 Motion2D::~Motion2D()
 {
 }
 
 /***************************************************************
  WindowMotionManager
 ***************************************************************/
 
 WindowMotionManager::WindowMotionManager(bool useGlobalAnimationModifier)
     :   m_useGlobalAnimationModifier(useGlobalAnimationModifier)
 
 {
     // TODO: Allow developer to modify motion attributes
 } // TODO: What happens when the window moves by an external force?
 
 WindowMotionManager::~WindowMotionManager()
 {
 }
 
 void WindowMotionManager::manage(EffectWindow *w)
 {
     if (m_managedWindows.contains(w))
         return;
 
     double strength = 0.08;
     double smoothness = 4.0;
     if (m_useGlobalAnimationModifier && effects->animationTimeFactor()) {
         // If the factor is == 0 then we just skip the calculation completely
         strength = 0.08 / effects->animationTimeFactor();
         smoothness = effects->animationTimeFactor() * 4.0;
     }
 
     WindowMotion &motion = m_managedWindows[ w ];
     motion.translation.setStrength(strength);
     motion.translation.setSmoothness(smoothness);
     motion.scale.setStrength(strength * 1.33);
     motion.scale.setSmoothness(smoothness / 2.0);
 
     motion.translation.setValue(w->pos());
     motion.scale.setValue(QPointF(1.0, 1.0));
 }
 
 void WindowMotionManager::unmanage(EffectWindow *w)
 {
     m_movingWindowsSet.remove(w);
     m_managedWindows.remove(w);
 }
 
 void WindowMotionManager::unmanageAll()
 {
     m_managedWindows.clear();
     m_movingWindowsSet.clear();
 }
 
 void WindowMotionManager::calculate(int time)
 {
     if (!effects->animationTimeFactor()) {
         // Just skip it completely if the user wants no animation
         m_movingWindowsSet.clear();
         QHash<EffectWindow*, WindowMotion>::iterator it = m_managedWindows.begin();
         for (; it != m_managedWindows.end(); ++it) {
             WindowMotion *motion = &it.value();
             motion->translation.finish();
             motion->scale.finish();
         }
     }
 
     QHash<EffectWindow*, WindowMotion>::iterator it = m_managedWindows.begin();
     for (; it != m_managedWindows.end(); ++it) {
         WindowMotion *motion = &it.value();
         int stopped = 0;
 
         // TODO: What happens when distance() == 0 but we are still moving fast?
         // TODO: Motion needs to be calculated from the window's center
 
         Motion2D *trans = &motion->translation;
         if (trans->distance().isNull())
             ++stopped;
         else {
             // Still moving
             trans->calculate(time);
             const short fx = trans->target().x() <= trans->startValue().x() ? -1 : 1;
             const short fy = trans->target().y() <= trans->startValue().y() ? -1 : 1;
             if (trans->distance().x()*fx/0.5 < 1.0 && trans->velocity().x()*fx/0.2 < 1.0 &&
                 trans->distance().y()*fy/0.5 < 1.0 && trans->velocity().y()*fy/0.2 < 1.0) {
                 // Hide tiny oscillations
                 motion->translation.finish();
                 ++stopped;
             }
         }
 
         Motion2D *scale = &motion->scale;
         if (scale->distance().isNull())
             ++stopped;
         else {
             // Still scaling
             scale->calculate(time);
             const short fx = scale->target().x() < 1.0 ? -1 : 1;
             const short fy = scale->target().y() < 1.0 ? -1 : 1;
             if (scale->distance().x()*fx/0.001 < 1.0 && scale->velocity().x()*fx/0.05 < 1.0 &&
                 scale->distance().y()*fy/0.001 < 1.0 && scale->velocity().y()*fy/0.05 < 1.0) {
                 // Hide tiny oscillations
                 motion->scale.finish();
                 ++stopped;
             }
         }
 
         // We just finished this window's motion
         if (stopped == 2)
             m_movingWindowsSet.remove(it.key());
     }
 }
 
 void WindowMotionManager::reset()
 {
     QHash<EffectWindow*, WindowMotion>::iterator it = m_managedWindows.begin();
     for (; it != m_managedWindows.end(); ++it) {
         WindowMotion *motion = &it.value();
         EffectWindow *window = it.key();
         motion->translation.setTarget(window->pos());
         motion->translation.finish();
         motion->scale.setTarget(QPointF(1.0, 1.0));
         motion->scale.finish();
     }
 }
 
 void WindowMotionManager::reset(EffectWindow *w)
 {
     QHash<EffectWindow*, WindowMotion>::iterator it = m_managedWindows.find(w);
     if (it == m_managedWindows.end())
         return;
 
     WindowMotion *motion = &it.value();
     motion->translation.setTarget(w->pos());
     motion->translation.finish();
     motion->scale.setTarget(QPointF(1.0, 1.0));
     motion->scale.finish();
 }
 
 void WindowMotionManager::apply(EffectWindow *w, WindowPaintData &data)
 {
     QHash<EffectWindow*, WindowMotion>::iterator it = m_managedWindows.find(w);
     if (it == m_managedWindows.end())
         return;
 
     // TODO: Take into account existing scale so that we can work with multiple managers (E.g. Present windows + grid)
     WindowMotion *motion = &it.value();
     data += (motion->translation.value() - QPointF(w->x(), w->y()));
     data *= QVector2D(motion->scale.value());
 }
 
 void WindowMotionManager::moveWindow(EffectWindow *w, QPoint target, double scale, double yScale)
 {
     QHash<EffectWindow*, WindowMotion>::iterator it = m_managedWindows.find(w);
     if (it == m_managedWindows.end())
         abort(); // Notify the effect author that they did something wrong
 
     WindowMotion *motion = &it.value();
 
     if (yScale == 0.0)
         yScale = scale;
     QPointF scalePoint(scale, yScale);
 
     if (motion->translation.value() == target && motion->scale.value() == scalePoint)
         return; // Window already at that position
 
     motion->translation.setTarget(target);
     motion->scale.setTarget(scalePoint);
 
     m_movingWindowsSet << w;
 }
 
 QRectF WindowMotionManager::transformedGeometry(EffectWindow *w) const
 {
     QHash<EffectWindow*, WindowMotion>::const_iterator it = m_managedWindows.constFind(w);
     if (it == m_managedWindows.end())
         return w->geometry();
 
     const WindowMotion *motion = &it.value();
     QRectF geometry(w->geometry());
 
     // TODO: Take into account existing scale so that we can work with multiple managers (E.g. Present windows + grid)
     geometry.moveTo(motion->translation.value());
     geometry.setWidth(geometry.width() * motion->scale.value().x());
     geometry.setHeight(geometry.height() * motion->scale.value().y());
 
     return geometry;
 }
 
 void WindowMotionManager::setTransformedGeometry(EffectWindow *w, const QRectF &geometry)
 {
     QHash<EffectWindow*, WindowMotion>::iterator it = m_managedWindows.find(w);
     if (it == m_managedWindows.end())
         return;
     WindowMotion *motion = &it.value();
     motion->translation.setValue(geometry.topLeft());
     motion->scale.setValue(QPointF(geometry.width() / qreal(w->width()), geometry.height() / qreal(w->height())));
 }
 
 QRectF WindowMotionManager::targetGeometry(EffectWindow *w) const
 {
     QHash<EffectWindow*, WindowMotion>::const_iterator it = m_managedWindows.constFind(w);
     if (it == m_managedWindows.end())
         return w->geometry();
 
     const WindowMotion *motion = &it.value();
     QRectF geometry(w->geometry());
 
     // TODO: Take into account existing scale so that we can work with multiple managers (E.g. Present windows + grid)
     geometry.moveTo(motion->translation.target());
     geometry.setWidth(geometry.width() * motion->scale.target().x());
     geometry.setHeight(geometry.height() * motion->scale.target().y());
 
     return geometry;
 }
 
 EffectWindow* WindowMotionManager::windowAtPoint(QPoint point, bool useStackingOrder) const
 {
     Q_UNUSED(useStackingOrder);
     // TODO: Stacking order uses EffectsHandler::stackingOrder() then filters by m_managedWindows
     QHash< EffectWindow*, WindowMotion >::ConstIterator it = m_managedWindows.constBegin();
     while (it != m_managedWindows.constEnd()) {
         if (transformedGeometry(it.key()).contains(point))
             return it.key();
         ++it;
     }
 
     return nullptr;
 }
 
 /***************************************************************
  EffectFramePrivate
 ***************************************************************/
 class EffectFramePrivate
 {
 public:
     EffectFramePrivate();
     ~EffectFramePrivate();
 
     bool crossFading;
     qreal crossFadeProgress;
     QMatrix4x4 screenProjectionMatrix;
 };
 
 EffectFramePrivate::EffectFramePrivate()
     : crossFading(false)
     , crossFadeProgress(1.0)
 {
 }
 
 EffectFramePrivate::~EffectFramePrivate()
 {
 }
 
 /***************************************************************
  EffectFrame
 ***************************************************************/
 EffectFrame::EffectFrame()
     : d(new EffectFramePrivate)
 {
 }
 
 EffectFrame::~EffectFrame()
 {
     delete d;
 }
 
 qreal EffectFrame::crossFadeProgress() const
 {
     return d->crossFadeProgress;
 }
 
 void EffectFrame::setCrossFadeProgress(qreal progress)
 {
     d->crossFadeProgress = progress;
 }
 
 bool EffectFrame::isCrossFade() const
 {
     return d->crossFading;
 }
 
 void EffectFrame::enableCrossFade(bool enable)
 {
     d->crossFading = enable;
 }
 
 QMatrix4x4 EffectFrame::screenProjectionMatrix() const
 {
     return d->screenProjectionMatrix;
 }
 
 void EffectFrame::setScreenProjectionMatrix(const QMatrix4x4 &spm)
 {
     d->screenProjectionMatrix = spm;
 }
 
 } // namespace
 
diff --git a/libkwineffects/kwineffects.h b/libkwineffects/kwineffects.h
index cd55516a9..6ddff5a99 100644
--- a/libkwineffects/kwineffects.h
+++ b/libkwineffects/kwineffects.h
@@ -1,3404 +1,3427 @@
 /********************************************************************
  KWin - the KDE window manager
  This file is part of the KDE project.
 
 Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
 Copyright (C) 2009 Lucas Murray <lmurray@undefinedfire.com>
 Copyright (C) 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 
 #ifndef KWINEFFECTS_H
 #define KWINEFFECTS_H
 
 #include <kwinconfig.h>
 #include <kwineffects_export.h>
 #include <kwinglobals.h>
 
 #include <QIcon>
 #include <QPair>
 #include <QSet>
 #include <QRect>
 #include <QtGui/QRegion>
 #include <QtGui/QVector2D>
 #include <QtGui/QVector3D>
 
 #include <QVector>
 #include <QLoggingCategory>
 #include <QList>
 #include <QHash>
 #include <QStack>
 #include <QScopedPointer>
 
 #include <KPluginFactory>
 
 #include <assert.h>
 #include <limits.h>
 #include <netwm.h>
 
 #include <functional>
 
 class KConfigGroup;
 class QFont;
 class QGraphicsScale;
 class QKeyEvent;
 class QMatrix4x4;
 
 /**
  * Logging category to be used inside the KWin effects.
  * Do not use in this library.
  **/
 Q_DECLARE_LOGGING_CATEGORY(KWINEFFECTS)
 
 namespace KWayland {
     namespace Server {
         class SurfaceInterface;
         class Display;
     }
 }
 
 namespace KWin
 {
 
 class PaintDataPrivate;
 class WindowPaintDataPrivate;
 
 class EffectWindow;
 class EffectWindowGroup;
 class EffectFrame;
 class EffectFramePrivate;
 class Effect;
 class WindowQuad;
 class GLShader;
 class XRenderPicture;
 class WindowQuadList;
 class WindowPrePaintData;
 class WindowPaintData;
 class ScreenPrePaintData;
 class ScreenPaintData;
 
 typedef QPair< QString, Effect* > EffectPair;
 typedef QList< KWin::EffectWindow* > EffectWindowList;
 
 
 /** @defgroup kwineffects KWin effects library
  * KWin effects library contains necessary classes for creating new KWin
  * compositing effects.
  *
  * @section creating Creating new effects
  * This example will demonstrate the basics of creating an effect. We'll use
  *  CoolEffect as the class name, cooleffect as internal name and
  *  "Cool Effect" as user-visible name of the effect.
  *
  * This example doesn't demonstrate how to write the effect's code. For that,
  *  see the documentation of the Effect class.
  *
  * @subsection creating-class CoolEffect class
  * First you need to create CoolEffect class which has to be a subclass of
  *  @ref KWin::Effect. In that class you can reimplement various virtual
  *  methods to control how and where the windows are drawn.
  *
  * @subsection creating-macro KWIN_EFFECT_FACTORY macro
  * This library provides a specialized KPluginFactory subclass and macros to
  * create a sub class. This subclass of KPluginFactory has to be used, otherwise
  * KWin won't load the plugin. Use the @ref KWIN_EFFECT_FACTORY macro to create the
  * plugin factory.
  *
  * @subsection creating-buildsystem Buildsystem
  * To build the effect, you can use the KWIN_ADD_EFFECT() cmake macro which
  *  can be found in effects/CMakeLists.txt file in KWin's source. First
  *  argument of the macro is the name of the library that will contain
  *  your effect. Although not strictly required, it is usually a good idea to
  *  use the same name as your effect's internal name there. Following arguments
  *  to the macro are the files containing your effect's source. If our effect's
  *  source is in cooleffect.cpp, we'd use following:
  * @code
  *  KWIN_ADD_EFFECT(cooleffect cooleffect.cpp)
  * @endcode
  *
  * This macro takes care of compiling your effect. You'll also need to install
  *  your effect's .desktop file, so the example CMakeLists.txt file would be
  *  as follows:
  * @code
  *  KWIN_ADD_EFFECT(cooleffect cooleffect.cpp)
  *  install( FILES cooleffect.desktop DESTINATION ${SERVICES_INSTALL_DIR}/kwin )
  * @endcode
  *
  * @subsection creating-desktop Effect's .desktop file
  * You will also need to create .desktop file to set name, description, icon
  *  and other properties of your effect. Important fields of the .desktop file
  *  are:
  *  @li Name User-visible name of your effect
  *  @li Icon Name of the icon of the effect
  *  @li Comment Short description of the effect
  *  @li Type must be "Service"
  *  @li X-KDE-ServiceTypes must be "KWin/Effect"
  *  @li X-KDE-PluginInfo-Name effect's internal name as passed to the KWIN_EFFECT macro plus "kwin4_effect_" prefix
  *  @li X-KDE-PluginInfo-Category effect's category. Should be one of Appearance, Accessibility, Window Management, Demos, Tests, Misc
  *  @li X-KDE-PluginInfo-EnabledByDefault whether the effect should be enabled by default (use sparingly). Default is false
  *  @li X-KDE-Library name of the library containing the effect. This is the first argument passed to the KWIN_ADD_EFFECT macro in cmake file plus "kwin4_effect_" prefix.
  *
  * Example cooleffect.desktop file follows:
  * @code
 [Desktop Entry]
 Name=Cool Effect
 Comment=The coolest effect you've ever seen
 Icon=preferences-system-windows-effect-cooleffect
 
 Type=Service
 X-KDE-ServiceTypes=KWin/Effect
 X-KDE-PluginInfo-Author=My Name
 X-KDE-PluginInfo-Email=my@email.here
 X-KDE-PluginInfo-Name=kwin4_effect_cooleffect
 X-KDE-PluginInfo-Category=Misc
 X-KDE-Library=kwin4_effect_cooleffect
  * @endcode
  *
  *
  * @section accessing Accessing windows and workspace
  * Effects can gain access to the properties of windows and workspace via
  *  EffectWindow and EffectsHandler classes.
  *
  * There is one global EffectsHandler object which you can access using the
  *  @ref effects pointer.
  * For each window, there is an EffectWindow object which can be used to read
  *  window properties such as position and also to change them.
  *
  * For more information about this, see the documentation of the corresponding
  *  classes.
  *
  * @{
  **/
 
 #define KWIN_EFFECT_API_MAKE_VERSION( major, minor ) (( major ) << 8 | ( minor ))
 #define KWIN_EFFECT_API_VERSION_MAJOR 0
 #define KWIN_EFFECT_API_VERSION_MINOR 224
 #define KWIN_EFFECT_API_VERSION KWIN_EFFECT_API_MAKE_VERSION( \
         KWIN_EFFECT_API_VERSION_MAJOR, KWIN_EFFECT_API_VERSION_MINOR )
 
 enum WindowQuadType {
     WindowQuadError, // for the stupid default ctor
     WindowQuadContents,
     WindowQuadDecoration,
     // Shadow Quad types
     WindowQuadShadow,             // OpenGL only. The other shadow types are only used by Xrender
     WindowQuadShadowTop,
     WindowQuadShadowTopRight,
     WindowQuadShadowRight,
     WindowQuadShadowBottomRight,
     WindowQuadShadowBottom,
     WindowQuadShadowBottomLeft,
     WindowQuadShadowLeft,
     WindowQuadShadowTopLeft,
     EFFECT_QUAD_TYPE_START = 100 ///< @internal
 };
 
 /**
  * EffectWindow::setData() and EffectWindow::data() global roles.
  * All values between 0 and 999 are reserved for global roles.
  */
 enum DataRole {
     // Grab roles are used to force all other animations to ignore the window.
     // The value of the data is set to the Effect's `this` value.
     WindowAddedGrabRole = 1,
     WindowClosedGrabRole,
     WindowMinimizedGrabRole,
     WindowUnminimizedGrabRole,
     WindowForceBlurRole, ///< For fullscreen effects to enforce blurring of windows,
     WindowBlurBehindRole, ///< For single windows to blur behind
     WindowForceBackgroundContrastRole, ///< For fullscreen effects to enforce the background contrast,
     WindowBackgroundContrastRole, ///< For single windows to enable Background contrast
     LanczosCacheRole
 };
 
 /**
  * Style types used by @ref EffectFrame.
  * @since 4.6
  */
 enum EffectFrameStyle {
     EffectFrameNone, ///< Displays no frame around the contents.
     EffectFrameUnstyled, ///< Displays a basic box around the contents.
     EffectFrameStyled ///< Displays a Plasma-styled frame around the contents.
 };
 
 /**
  * Infinite region (i.e. a special region type saying that everything needs to be painted).
  */
 KWINEFFECTS_EXPORT inline
 QRect infiniteRegion()
 {
     // INT_MIN / 2 because width/height is used (INT_MIN+INT_MAX==-1)
     return QRect(INT_MIN / 2, INT_MIN / 2, INT_MAX, INT_MAX);
 }
 
 /**
  * @short Base class for all KWin effects
  *
  * This is the base class for all effects. By reimplementing virtual methods
  *  of this class, you can customize how the windows are painted.
  *
  * The virtual methods are used for painting and need to be implemented for
  * custom painting.
  *
  * In order to react to state changes (e.g. a window gets closed) the effect
  * should provide slots for the signals emitted by the EffectsHandler.
  *
  * @section Chaining
  * Most methods of this class are called in chain style. This means that when
  *  effects A and B area active then first e.g. A::paintWindow() is called and
  *  then from within that method B::paintWindow() is called (although
  *  indirectly). To achieve this, you need to make sure to call corresponding
  *  method in EffectsHandler class from each such method (using @ref effects
  *  pointer):
  * @code
  *  void MyEffect::postPaintScreen()
  *  {
  *      // Do your own processing here
  *      ...
  *      // Call corresponding EffectsHandler method
  *      effects->postPaintScreen();
  *  }
  * @endcode
  *
  * @section Effectsptr Effects pointer
  * @ref effects pointer points to the global EffectsHandler object that you can
  *  use to interact with the windows.
  *
  * @section painting Painting stages
  * Painting of windows is done in three stages:
  * @li First, the prepaint pass.<br>
  *  Here you can specify how the windows will be painted, e.g. that they will
  *  be translucent and transformed.
  * @li Second, the paint pass.<br>
  *  Here the actual painting takes place. You can change attributes such as
  *  opacity of windows as well as apply transformations to them. You can also
  *  paint something onto the screen yourself.
  * @li Finally, the postpaint pass.<br>
  *  Here you can mark windows, part of windows or even the entire screen for
  *  repainting to create animations.
  *
  * For each stage there are *Screen() and *Window() methods. The window method
  *  is called for every window which the screen method is usually called just
  *  once.
  *
  * @section OpenGL
  * Effects can use OpenGL if EffectsHandler::isOpenGLCompositing() returns @c true.
  * The OpenGL context may not always be current when code inside the effect is
  * executed. The framework ensures that the OpenGL context is current when the Effect
  * gets created, destroyed or reconfigured and during the painting stages. All virtual
  * methods which have the OpenGL context current are documented.
  *
  * If OpenGL code is going to be executed outside the painting stages, e.g. in reaction
  * to a global shortcut, it is the task of the Effect to make the OpenGL context current:
  * @code
  * effects->makeOpenGLContextCurrent();
  * @endcode
  *
  * There is in general no need to call the matching doneCurrent method.
  **/
 class KWINEFFECTS_EXPORT Effect : public QObject
 {
     Q_OBJECT
 public:
     /** Flags controlling how painting is done. */
     // TODO: is that ok here?
     enum {
         /**
          * Window (or at least part of it) will be painted opaque.
          **/
         PAINT_WINDOW_OPAQUE         = 1 << 0,
         /**
          * Window (or at least part of it) will be painted translucent.
          **/
         PAINT_WINDOW_TRANSLUCENT    = 1 << 1,
         /**
          * Window will be painted with transformed geometry.
          **/
         PAINT_WINDOW_TRANSFORMED    = 1 << 2,
         /**
          * Paint only a region of the screen (can be optimized, cannot
          * be used together with TRANSFORMED flags).
          **/
         PAINT_SCREEN_REGION         = 1 << 3,
         /**
          * The whole screen will be painted with transformed geometry.
          * Forces the entire screen to be painted.
          **/
         PAINT_SCREEN_TRANSFORMED    = 1 << 4,
         /**
          * At least one window will be painted with transformed geometry.
          * Forces the entire screen to be painted.
          **/
         PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS = 1 << 5,
         /**
          * Clear whole background as the very first step, without optimizing it
          **/
         PAINT_SCREEN_BACKGROUND_FIRST = 1 << 6,
         // PAINT_DECORATION_ONLY = 1 << 7 has been deprecated
         /**
          * Window will be painted with a lanczos filter.
          **/
         PAINT_WINDOW_LANCZOS = 1 << 8
         // PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS_WITHOUT_FULL_REPAINTS = 1 << 9 has been removed
     };
 
     enum Feature {
         Nothing = 0, Resize, GeometryTip, Outline, ScreenInversion, Blur, Contrast, HighlightWindows
     };
 
     /**
      * Constructs new Effect object.
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when the Effect is constructed.
      **/
     Effect();
     /**
      * Destructs the Effect object.
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when the Effect is destroyed.
      **/
     virtual ~Effect();
 
     /**
      * Flags describing which parts of configuration have changed.
      */
     enum ReconfigureFlag {
         ReconfigureAll = 1 << 0 /// Everything needs to be reconfigured.
     };
     Q_DECLARE_FLAGS(ReconfigureFlags, ReconfigureFlag)
 
     /**
      * Called when configuration changes (either the effect's or KWin's global).
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when the Effect is reconfigured. If this method is called from within the Effect it is
      * required to ensure that the context is current if the implementation does OpenGL calls.
      */
     virtual void reconfigure(ReconfigureFlags flags);
 
     /**
      * Called when another effect requests the proxy for this effect.
      */
     virtual void* proxy();
 
     /**
      * Called before starting to paint the screen.
      * In this method you can:
      * @li set whether the windows or the entire screen will be transformed
      * @li change the region of the screen that will be painted
      * @li do various housekeeping tasks such as initing your effect's variables
             for the upcoming paint pass or updating animation's progress
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when this method is invoked.
     **/
     virtual void prePaintScreen(ScreenPrePaintData& data, int time);
     /**
      * In this method you can:
      * @li paint something on top of the windows (by painting after calling
      *      effects->paintScreen())
      * @li paint multiple desktops and/or multiple copies of the same desktop
      *      by calling effects->paintScreen() multiple times
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when this method is invoked.
      **/
     virtual void paintScreen(int mask, QRegion region, ScreenPaintData& data);
     /**
      * Called after all the painting has been finished.
      * In this method you can:
      * @li schedule next repaint in case of animations
      * You shouldn't paint anything here.
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when this method is invoked.
      **/
     virtual void postPaintScreen();
 
     /**
      * Called for every window before the actual paint pass
      * In this method you can:
      * @li enable or disable painting of the window (e.g. enable paiting of minimized window)
      * @li set window to be painted with translucency
      * @li set window to be transformed
      * @li request the window to be divided into multiple parts
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when this method is invoked.
      **/
     virtual void prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time);
     /**
      * This is the main method for painting windows.
      * In this method you can:
      * @li do various transformations
      * @li change opacity of the window
      * @li change brightness and/or saturation, if it's supported
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when this method is invoked.
      **/
     virtual void paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data);
     /**
      * Called for every window after all painting has been finished.
      * In this method you can:
      * @li schedule next repaint for individual window(s) in case of animations
      * You shouldn't paint anything here.
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when this method is invoked.
      **/
     virtual void postPaintWindow(EffectWindow* w);
 
     /**
      * This method is called directly before painting an @ref EffectFrame.
      * You can implement this method if you need to bind a shader or perform
      * other operations before the frame is rendered.
      * @param frame The EffectFrame which will be rendered
      * @param region Region to restrict painting to
      * @param opacity Opacity of text/icon
      * @param frameOpacity Opacity of background
      * @since 4.6
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when this method is invoked.
      **/
     virtual void paintEffectFrame(EffectFrame* frame, QRegion region, double opacity, double frameOpacity);
 
     /**
      * Called on Transparent resizes.
      * return true if your effect substitutes questioned feature
     */
     virtual bool provides(Feature);
 
     /**
      * Performs the @p feature with the @p arguments.
      *
      * This allows to have specific protocols between KWin core and an Effect.
      *
      * The method is supposed to return @c true if it performed the features,
      * @c false otherwise.
      *
      * The default implementation returns @c false.
      * @since 5.8
      **/
     virtual bool perform(Feature feature, const QVariantList &arguments);
 
     /**
      * Can be called to draw multiple copies (e.g. thumbnails) of a window.
      * You can change window's opacity/brightness/etc here, but you can't
      *  do any transformations.
      *
      * In OpenGL based compositing, the frameworks ensures that the context is current
      * when this method is invoked.
      **/
     virtual void drawWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data);
 
     /**
      * Define new window quads so that they can be transformed by other effects.
      * It's up to the effect to keep track of them.
      **/
     virtual void buildQuads(EffectWindow* w, WindowQuadList& quadList);
 
     virtual void windowInputMouseEvent(QEvent* e);
     virtual void grabbedKeyboardEvent(QKeyEvent* e);
 
     /**
      * Overwrite this method to indicate whether your effect will be doing something in
      * the next frame to be rendered. If the method returns @c false the effect will be
      * excluded from the chained methods in the next rendered frame.
      *
      * This method is called always directly before the paint loop begins. So it is totally
      * fine to e.g. react on a window event, issue a repaint to trigger an animation and
      * change a flag to indicate that this method returns @c true.
      *
      * As the method is called each frame, you should not perform complex calculations.
      * Best use just a boolean flag.
      *
      * The default implementation of this method returns @c true.
      * @since 4.8
      **/
     virtual bool isActive() const;
 
     /**
      * Reimplement this method to provide online debugging.
      * This could be as trivial as printing specific detail informations about the effect state
      * but could also be used to move the effect in and out of a special debug modes, clear bogus
      * data, etc.
      * Notice that the functions is const by intent! Whenever you alter the state of the object
      * due to random user input, you should do so with greatest care, hence const_cast<> your
      * object - signalling "let me alone, i know what i'm doing"
      * @param parameter A freeform string user input for your effect to interpret.
      * @since 4.11
      */
     virtual QString debug(const QString &parameter) const;
 
     /**
      * Reimplement this method to indicate where in the Effect chain the Effect should be placed.
      *
      * A low number indicates early chain position, thus before other Effects got called, a high
      * number indicates a late position. The returned number should be in the interval [0, 100].
      * The default value is 0.
      *
      * In KWin4 this information was provided in the Effect's desktop file as property
      * X-KDE-Ordering. In the case of Scripted Effects this property is still used.
      *
      * @since 5.0
      **/
     virtual int requestedEffectChainPosition() const;
 
 
     /**
      * A touch point was pressed.
      *
      * If the effect wants to exclusively use the touch event it should return @c true.
      * If @c false is returned the touch event is passed to further effects.
      *
      * In general an Effect should only return @c true if it is the exclusive effect getting
      * input events. E.g. has grabbed mouse events.
      *
      * Default implementation returns @c false.
      *
      * @param id The unique id of the touch point
      * @param pos The position of the touch point in global coordinates
      * @param time Timestamp
      *
      * @see touchMotion
      * @see touchUp
      * @since 5.8
      **/
     virtual bool touchDown(quint32 id, const QPointF &pos, quint32 time);
     /**
      * A touch point moved.
      *
      * If the effect wants to exclusively use the touch event it should return @c true.
      * If @c false is returned the touch event is passed to further effects.
      *
      * In general an Effect should only return @c true if it is the exclusive effect getting
      * input events. E.g. has grabbed mouse events.
      *
      * Default implementation returns @c false.
      *
      * @param id The unique id of the touch point
      * @param pos The position of the touch point in global coordinates
      * @param time Timestamp
      *
      * @see touchDown
      * @see touchUp
      * @since 5.8
      **/
     virtual bool touchMotion(quint32 id, const QPointF &pos, quint32 time);
     /**
      * A touch point was released.
      *
      * If the effect wants to exclusively use the touch event it should return @c true.
      * If @c false is returned the touch event is passed to further effects.
      *
      * In general an Effect should only return @c true if it is the exclusive effect getting
      * input events. E.g. has grabbed mouse events.
      *
      * Default implementation returns @c false.
      *
      * @param id The unique id of the touch point
      * @param time Timestamp
      *
      * @see touchDown
      * @see touchMotion
      * @since 5.8
      **/
     virtual bool touchUp(quint32 id, quint32 time);
 
     static QPoint cursorPos();
 
     /**
      * Read animation time from the configuration and possibly adjust using animationTimeFactor().
      * The configuration value in the effect should also have special value 'default' (set using
      * QSpinBox::setSpecialValueText()) with the value 0. This special value is adjusted
      * using the global animation speed, otherwise the exact time configured is returned.
      * @param cfg configuration group to read value from
      * @param key configuration key to read value from
      * @param defaultTime default animation time in milliseconds
      */
     // return type is intentionally double so that one can divide using it without losing data
     static double animationTime(const KConfigGroup& cfg, const QString& key, int defaultTime);
     /**
      * @overload Use this variant if the animation time is hardcoded and not configurable
      * in the effect itself.
      */
     static double animationTime(int defaultTime);
     /**
      * @overload Use this variant if animation time is provided through a KConfigXT generated class
      * having a property called "duration".
      **/
     template <typename T>
     int animationTime(int defaultDuration);
     /**
      * Linearly interpolates between @p x and @p y.
      *
      * Returns @p x when @p a = 0; returns @p y when @p a = 1.
      **/
     static double interpolate(double x, double y, double a) {
         return x * (1 - a) + y * a;
     }
     /** Helper to set WindowPaintData and QRegion to necessary transformations so that
      * a following drawWindow() would put the window at the requested geometry (useful for thumbnails)
      **/
     static void setPositionTransformations(WindowPaintData& data, QRect& region, EffectWindow* w,
                                            const QRect& r, Qt::AspectRatioMode aspect);
 
 public Q_SLOTS:
     virtual bool borderActivated(ElectricBorder border);
 
 protected:
     xcb_connection_t *xcbConnection() const;
     xcb_window_t x11RootWindow() const;
 };
 
 
 /**
  * Prefer the KWIN_EFFECT_FACTORY macros.
  */
 class KWINEFFECTS_EXPORT EffectPluginFactory : public KPluginFactory
 {
     Q_OBJECT
 public:
     EffectPluginFactory();
     virtual ~EffectPluginFactory();
     /**
      * Returns whether the Effect is supported.
      *
      * An Effect can implement this method to determine at runtime whether the Effect is supported.
      *
      * If the current compositing backend is not supported it should return @c false.
      *
      * This method is optional, by default @c true is returned.
      */
     virtual bool isSupported() const;
     /**
      * Returns whether the Effect should get enabled by default.
      *
      * This function provides a way for an effect to override the default at runtime,
      * e.g. based on the capabilities of the hardware.
      *
      * This method is optional; the effect doesn't have to provide it.
      *
      * Note that this function is only called if the supported() function returns true,
      * and if X-KDE-PluginInfo-EnabledByDefault is set to true in the .desktop file.
      *
      * This method is optional, by default @c true is returned.
      */
     virtual bool enabledByDefault() const;
     /**
      * This method returns the created Effect.
      */
     virtual KWin::Effect *createEffect() const = 0;
 };
 
 /**
  * Defines an EffectPluginFactory sub class with customized isSupported and enabledByDefault methods.
  *
  * If the Effect to be created does not need the isSupported or enabledByDefault methods prefer
  * the simplified KWIN_EFFECT_FACTORY, KWIN_EFFECT_FACTORY_SUPPORTED or KWIN_EFFECT_FACTORY_ENABLED
  * macros which create an EffectPluginFactory with a useable default value.
  *
  * The macro also adds a useable K_EXPORT_PLUGIN_VERSION to the definition. KWin will not load
  * any Effect with a non-matching plugin version. This API is not providing binary compatibility
  * and thus the effect plugin must be compiled against the same kwineffects library version as
  * KWin.
  *
  * @param factoryName The name to be used for the EffectPluginFactory
  * @param className The class name of the Effect sub class which is to be created by the factory
  * @param jsonFile Name of the json file to be compiled into the plugin as metadata
  * @param supported Source code to go into the isSupported() method, must return a boolean
  * @param enabled Source code to go into the enabledByDefault() method, must return a boolean
  **/
 #define KWIN_EFFECT_FACTORY_SUPPORTED_ENABLED( factoryName, className, jsonFile, supported, enabled ) \
     class factoryName : public KWin::EffectPluginFactory \
     { \
         Q_OBJECT \
         Q_PLUGIN_METADATA(IID KPluginFactory_iid FILE jsonFile) \
         Q_INTERFACES(KPluginFactory) \
     public: \
         explicit factoryName() {} \
         ~factoryName() {} \
         bool isSupported() const override { \
             supported \
         } \
         bool enabledByDefault() const override { \
             enabled \
         } \
         KWin::Effect *createEffect() const override { \
             return new className(); \
         } \
     }; \
     K_EXPORT_PLUGIN_VERSION(quint32(KWIN_EFFECT_API_VERSION))
 
 #define KWIN_EFFECT_FACTORY_ENABLED( factoryName, className, jsonFile, enabled ) \
     KWIN_EFFECT_FACTORY_SUPPORTED_ENABLED( factoryName, className, jsonFile, return true;, enabled )
 
 #define KWIN_EFFECT_FACTORY_SUPPORTED( factoryName, classname, jsonFile, supported ) \
     KWIN_EFFECT_FACTORY_SUPPORTED_ENABLED( factoryName, className, jsonFile, supported, return true; )
 
 #define KWIN_EFFECT_FACTORY( factoryName, classname, jsonFile ) \
     KWIN_EFFECT_FACTORY_SUPPORTED_ENABLED( factoryName, className, jsonFile, return true;, return true; )
 
 
 
 /**
  * @short Manager class that handles all the effects.
  *
  * This class creates Effect objects and calls it's appropriate methods.
  *
  * Effect objects can call methods of this class to interact with the
  *  workspace, e.g. to activate or move a specific window, change current
  *  desktop or create a special input window to receive mouse and keyboard
  *  events.
  **/
 class KWINEFFECTS_EXPORT EffectsHandler : public QObject
 {
     Q_OBJECT
     Q_PROPERTY(int currentDesktop READ currentDesktop WRITE setCurrentDesktop NOTIFY desktopChanged)
     Q_PROPERTY(QString currentActivity READ currentActivity NOTIFY currentActivityChanged)
     Q_PROPERTY(KWin::EffectWindow *activeWindow READ activeWindow WRITE activateWindow NOTIFY windowActivated)
     Q_PROPERTY(QSize desktopGridSize READ desktopGridSize)
     Q_PROPERTY(int desktopGridWidth READ desktopGridWidth)
     Q_PROPERTY(int desktopGridHeight READ desktopGridHeight)
     Q_PROPERTY(int workspaceWidth READ workspaceWidth)
     Q_PROPERTY(int workspaceHeight READ workspaceHeight)
     /**
      * The number of desktops currently used. Minimum number of desktops is 1, maximum 20.
      **/
     Q_PROPERTY(int desktops READ numberOfDesktops WRITE setNumberOfDesktops NOTIFY numberDesktopsChanged)
     Q_PROPERTY(bool optionRollOverDesktops READ optionRollOverDesktops)
     Q_PROPERTY(int activeScreen READ activeScreen)
     Q_PROPERTY(int numScreens READ numScreens NOTIFY numberScreensChanged)
     /**
      * Factor by which animation speed in the effect should be modified (multiplied).
      * If configurable in the effect itself, the option should have also 'default'
      * animation speed. The actual value should be determined using animationTime().
      * Note: The factor can be also 0, so make sure your code can cope with 0ms time
      * if used manually.
      */
     Q_PROPERTY(qreal animationTimeFactor READ animationTimeFactor)
     Q_PROPERTY(QList< KWin::EffectWindow* > stackingOrder READ stackingOrder)
     /**
      * Whether window decorations use the alpha channel.
      **/
     Q_PROPERTY(bool decorationsHaveAlpha READ decorationsHaveAlpha)
     /**
      * Whether the window decorations support blurring behind the decoration.
      **/
     Q_PROPERTY(bool decorationSupportsBlurBehind READ decorationSupportsBlurBehind)
     Q_PROPERTY(CompositingType compositingType READ compositingType CONSTANT)
     Q_PROPERTY(QPoint cursorPos READ cursorPos)
     Q_PROPERTY(QSize virtualScreenSize READ virtualScreenSize NOTIFY virtualScreenSizeChanged)
     Q_PROPERTY(QRect virtualScreenGeometry READ virtualScreenGeometry NOTIFY virtualScreenGeometryChanged)
     friend class Effect;
 public:
     explicit EffectsHandler(CompositingType type);
     virtual ~EffectsHandler();
     // for use by effects
     virtual void prePaintScreen(ScreenPrePaintData& data, int time) = 0;
     virtual void paintScreen(int mask, QRegion region, ScreenPaintData& data) = 0;
     virtual void postPaintScreen() = 0;
     virtual void prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time) = 0;
     virtual void paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data) = 0;
     virtual void postPaintWindow(EffectWindow* w) = 0;
     virtual void paintEffectFrame(EffectFrame* frame, QRegion region, double opacity, double frameOpacity) = 0;
     virtual void drawWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data) = 0;
     virtual void buildQuads(EffectWindow* w, WindowQuadList& quadList) = 0;
     virtual QVariant kwinOption(KWinOption kwopt) = 0;
     /**
      * Sets the cursor while the mouse is intercepted.
      * @see startMouseInterception
      * @since 4.11
      **/
     virtual void defineCursor(Qt::CursorShape shape) = 0;
     virtual QPoint cursorPos() const = 0;
     virtual bool grabKeyboard(Effect* effect) = 0;
     virtual void ungrabKeyboard() = 0;
     /**
      * Ensures that all mouse events are sent to the @p effect.
      * No window will get the mouse events. Only fullscreen effects providing a custom user interface should
      * be using this method. The input events are delivered to Effect::windowInputMouseEvent.
      *
      * NOTE: this method does not perform an X11 mouse grab. On X11 a fullscreen input window is raised above
      * all other windows, but no grab is performed.
      *
      * @param shape Sets the cursor to be used while the mouse is intercepted
      * @see stopMouseInterception
      * @see Effect::windowInputMouseEvent
      * @since 4.11
      **/
     virtual void startMouseInterception(Effect *effect, Qt::CursorShape shape) = 0;
     /**
      * Releases the hold mouse interception for @p effect
      * @see startMouseInterception
      * @since 4.11
      **/
     virtual void stopMouseInterception(Effect *effect) = 0;
 
     /**
      * @brief Registers a global shortcut with the provided @p action.
      *
      * @param shortcut The global shortcut which should trigger the action
      * @param action The action which gets triggered when the shortcut matches
      */
     virtual void registerGlobalShortcut(const QKeySequence &shortcut, QAction *action) = 0;
     /**
      * @brief Registers a global pointer shortcut with the provided @p action.
      *
      * @param modifiers The keyboard modifiers which need to be holded
      * @param pointerButtons The pointer buttons which need to be pressed
      * @param action The action which gets triggered when the shortcut matches
      **/
     virtual void registerPointerShortcut(Qt::KeyboardModifiers modifiers, Qt::MouseButton pointerButtons, QAction *action) = 0;
     /**
      * @brief Registers a global axis shortcut with the provided @p action.
      *
      * @param modifiers The keyboard modifiers which need to be holded
      * @param axis The direction in which the axis needs to be moved
      * @param action The action which gets triggered when the shortcut matches
      **/
     virtual void registerAxisShortcut(Qt::KeyboardModifiers modifiers, PointerAxisDirection axis, QAction *action) = 0;
 
     /**
      * @brief Registers a global touchpad swipe gesture shortcut with the provided @p action.
      *
      * @param direction The direction for the swipe
      * @param action The action which gets triggered when the gesture triggers
      * @since 5.10
      **/
     virtual void registerTouchpadSwipeShortcut(SwipeDirection direction, QAction *action) = 0;
 
     /**
      * Retrieve the proxy class for an effect if it has one. Will return NULL if
      * the effect isn't loaded or doesn't have a proxy class.
      */
     virtual void* getProxy(QString name) = 0;
 
     // Mouse polling
     virtual void startMousePolling() = 0;
     virtual void stopMousePolling() = 0;
 
     virtual void reserveElectricBorder(ElectricBorder border, Effect *effect) = 0;
     virtual void unreserveElectricBorder(ElectricBorder border, Effect *effect) = 0;
 
     // functions that allow controlling windows/desktop
     virtual void activateWindow(KWin::EffectWindow* c) = 0;
     virtual KWin::EffectWindow* activeWindow() const = 0 ;
     Q_SCRIPTABLE virtual void moveWindow(KWin::EffectWindow* w, const QPoint& pos, bool snap = false, double snapAdjust = 1.0) = 0;
     Q_SCRIPTABLE virtual void windowToDesktop(KWin::EffectWindow* w, int desktop) = 0;
     Q_SCRIPTABLE virtual void windowToScreen(KWin::EffectWindow* w, int screen) = 0;
     virtual void setShowingDesktop(bool showing) = 0;
 
 
     // Activities
     /**
      * @returns The ID of the current activity.
      */
     virtual QString currentActivity() const = 0;
     // Desktops
     /**
      * @returns The ID of the current desktop.
      */
     virtual int currentDesktop() const = 0;
     /**
      * @returns Total number of desktops currently in existence.
      */
     virtual int numberOfDesktops() const = 0;
     /**
      * Set the current desktop to @a desktop.
      */
     virtual void setCurrentDesktop(int desktop) = 0;
     /**
     * Sets the total number of desktops to @a desktops.
     */
     virtual void setNumberOfDesktops(int desktops) = 0;
     /**
      * @returns The size of desktop layout in grid units.
      */
     virtual QSize desktopGridSize() const = 0;
     /**
      * @returns The width of desktop layout in grid units.
      */
     virtual int desktopGridWidth() const = 0;
     /**
      * @returns The height of desktop layout in grid units.
      */
     virtual int desktopGridHeight() const = 0;
     /**
      * @returns The width of desktop layout in pixels.
      */
     virtual int workspaceWidth() const = 0;
     /**
      * @returns The height of desktop layout in pixels.
      */
     virtual int workspaceHeight() const = 0;
     /**
      * @returns The ID of the desktop at the point @a coords or 0 if no desktop exists at that
      * point. @a coords is to be in grid units.
      */
     virtual int desktopAtCoords(QPoint coords) const = 0;
     /**
      * @returns The coords of desktop @a id in grid units.
      */
     virtual QPoint desktopGridCoords(int id) const = 0;
     /**
      * @returns The coords of the top-left corner of desktop @a id in pixels.
      */
     virtual QPoint desktopCoords(int id) const = 0;
     /**
      * @returns The ID of the desktop above desktop @a id. Wraps around to the bottom of
      * the layout if @a wrap is set. If @a id is not set use the current one.
      */
     Q_SCRIPTABLE virtual int desktopAbove(int desktop = 0, bool wrap = true) const = 0;
     /**
      * @returns The ID of the desktop to the right of desktop @a id. Wraps around to the
      * left of the layout if @a wrap is set. If @a id is not set use the current one.
      */
     Q_SCRIPTABLE virtual int desktopToRight(int desktop = 0, bool wrap = true) const = 0;
     /**
      * @returns The ID of the desktop below desktop @a id. Wraps around to the top of the
      * layout if @a wrap is set. If @a id is not set use the current one.
      */
     Q_SCRIPTABLE virtual int desktopBelow(int desktop = 0, bool wrap = true) const = 0;
     /**
      * @returns The ID of the desktop to the left of desktop @a id. Wraps around to the
      * right of the layout if @a wrap is set. If @a id is not set use the current one.
      */
     Q_SCRIPTABLE virtual int desktopToLeft(int desktop = 0, bool wrap = true) const = 0;
     Q_SCRIPTABLE virtual QString desktopName(int desktop) const = 0;
     virtual bool optionRollOverDesktops() const = 0;
 
     virtual int activeScreen() const = 0; // Xinerama
     virtual int numScreens() const = 0; // Xinerama
     Q_SCRIPTABLE virtual int screenNumber(const QPoint& pos) const = 0;   // Xinerama
     virtual QRect clientArea(clientAreaOption, int screen, int desktop) const = 0;
     virtual QRect clientArea(clientAreaOption, const EffectWindow* c) const = 0;
     virtual QRect clientArea(clientAreaOption, const QPoint& p, int desktop) const = 0;
 
     /**
      * The bounding size of all screens combined. Overlapping areas
      * are not counted multiple times.
      *
      * @see virtualScreenGeometry()
      * @see virtualScreenSizeChanged()
      * @since 5.0
      **/
     virtual QSize virtualScreenSize() const = 0;
     /**
      * The bounding geometry of all outputs combined. Always starts at (0,0) and has
      * virtualScreenSize as it's size.
      *
      * @see virtualScreenSize()
      * @see virtualScreenGeometryChanged()
      * @since 5.0
      **/
     virtual QRect virtualScreenGeometry() const = 0;
     /**
      * Factor by which animation speed in the effect should be modified (multiplied).
      * If configurable in the effect itself, the option should have also 'default'
      * animation speed. The actual value should be determined using animationTime().
      * Note: The factor can be also 0, so make sure your code can cope with 0ms time
      * if used manually.
      */
     virtual double animationTimeFactor() const = 0;
     virtual WindowQuadType newWindowQuadType() = 0;
 
     Q_SCRIPTABLE virtual KWin::EffectWindow* findWindow(WId id) const = 0;
     Q_SCRIPTABLE virtual KWin::EffectWindow* findWindow(KWayland::Server::SurfaceInterface *surf) const = 0;
     virtual EffectWindowList stackingOrder() const = 0;
     // window will be temporarily painted as if being at the top of the stack
     Q_SCRIPTABLE virtual void setElevatedWindow(KWin::EffectWindow* w, bool set) = 0;
 
     virtual void setTabBoxWindow(EffectWindow*) = 0;
     virtual void setTabBoxDesktop(int) = 0;
     virtual EffectWindowList currentTabBoxWindowList() const = 0;
     virtual void refTabBox() = 0;
     virtual void unrefTabBox() = 0;
     virtual void closeTabBox() = 0;
     virtual QList< int > currentTabBoxDesktopList() const = 0;
     virtual int currentTabBoxDesktop() const = 0;
     virtual EffectWindow* currentTabBoxWindow() const = 0;
 
     virtual void setActiveFullScreenEffect(Effect* e) = 0;
     virtual Effect* activeFullScreenEffect() const = 0;
 
     /**
      * Schedules the entire workspace to be repainted next time.
      * If you call it during painting (including prepaint) then it does not
      *  affect the current painting.
      **/
     Q_SCRIPTABLE virtual void addRepaintFull() = 0;
     Q_SCRIPTABLE virtual void addRepaint(const QRect& r) = 0;
     Q_SCRIPTABLE virtual void addRepaint(const QRegion& r) = 0;
     Q_SCRIPTABLE virtual void addRepaint(int x, int y, int w, int h) = 0;
 
     CompositingType compositingType() const;
     /**
      * @brief Whether the Compositor is OpenGL based (either GL 1 or 2).
      *
      * @return bool @c true in case of OpenGL based Compositor, @c false otherwise
      **/
     bool isOpenGLCompositing() const;
     virtual unsigned long xrenderBufferPicture() = 0;
     /**
      * @brief Provides access to the QPainter which is rendering to the back buffer.
      *
      * Only relevant for CompositingType QPainterCompositing. For all other compositing types
      * @c null is returned.
      *
      * @return QPainter* The Scene's QPainter or @c null.
      */
     virtual QPainter *scenePainter() = 0;
     virtual void reconfigure() = 0;
 
     virtual QByteArray readRootProperty(long atom, long type, int format) const = 0;
     /**
      * @brief Announces support for the feature with the given name. If no other Effect
      * has announced support for this feature yet, an X11 property will be installed on
      * the root window.
      *
      * The Effect will be notified for events through the signal propertyNotify().
      *
      * To remove the support again use @link removeSupportProperty. When an Effect is
      * destroyed it is automatically taken care of removing the support. It is not
      * required to call @link removeSupportProperty in the Effect's cleanup handling.
      *
      * @param propertyName The name of the property to announce support for
      * @param effect The effect which announces support
      * @return xcb_atom_t The created X11 atom
      * @see removeSupportProperty
      * @since 4.11
      **/
     virtual xcb_atom_t announceSupportProperty(const QByteArray &propertyName, Effect *effect) = 0;
     /**
      * @brief Removes support for the feature with the given name. If there is no other Effect left
      * which has announced support for the given property, the property will be removed from the
      * root window.
      *
      * In case the Effect had not registered support, calling this function does not change anything.
      *
      * @param propertyName The name of the property to remove support for
      * @param effect The effect which had registered the property.
      * @see announceSupportProperty
      * @since 4.11
      **/
     virtual void removeSupportProperty(const QByteArray &propertyName, Effect *effect) = 0;
 
     /**
      * Returns @a true if the active window decoration has shadow API hooks.
      */
     virtual bool hasDecorationShadows() const = 0;
 
     /**
      * Returns @a true if the window decorations use the alpha channel, and @a false otherwise.
      * @since 4.5
      */
     virtual bool decorationsHaveAlpha() const = 0;
 
     /**
      * Returns @a true if the window decorations support blurring behind the decoration, and @a false otherwise
      * @since 4.6
      */
     virtual bool decorationSupportsBlurBehind() const = 0;
 
     /**
      * Creates a new frame object. If the frame does not have a static size
      * then it will be located at @a position with @a alignment. A
      * non-static frame will automatically adjust its size to fit the contents.
      * @returns A new @ref EffectFrame. It is the responsibility of the caller to delete the
      * EffectFrame.
      * @since 4.6
      */
     virtual EffectFrame* effectFrame(EffectFrameStyle style, bool staticSize = true,
                                      const QPoint& position = QPoint(-1, -1), Qt::Alignment alignment = Qt::AlignCenter) const = 0;
 
     /**
      * Allows an effect to trigger a reload of itself.
      * This can be used by an effect which needs to be reloaded when screen geometry changes.
      * It is possible that the effect cannot be loaded again as it's supported method does no longer
      * hold.
      * @param effect The effect to reload
      * @since 4.8
      **/
     virtual void reloadEffect(Effect *effect) = 0;
 
     /**
      * Whether the screen is currently considered as locked.
      * Note for technical reasons this is not always possible to detect. The screen will only
      * be considered as locked if the screen locking process implements the
      * org.freedesktop.ScreenSaver interface.
      *
      * @returns @c true if the screen is currently locked, @c false otherwise
      * @see screenLockingChanged
      * @since 4.11
      **/
     virtual bool isScreenLocked() const = 0;
 
     /**
      * @brief Makes the OpenGL compositing context current.
      *
      * If the compositing backend is not using OpenGL, this method returns @c false.
      *
      * @return bool @c true if the context became current, @c false otherwise.
      */
     virtual bool makeOpenGLContextCurrent() = 0;
     /**
      * @brief Makes a null OpenGL context current resulting in no context
      * being current.
      *
      * If the compositing backend is not OpenGL based, this method is a noop.
      *
      * There is normally no reason for an Effect to call this method.
      */
     virtual void doneOpenGLContextCurrent() = 0;
 
     virtual xcb_connection_t *xcbConnection() const = 0;
     virtual xcb_window_t x11RootWindow() const = 0;
 
     /**
      * Interface to the Wayland display: this is relevant only
      * on Wayland, on X11 it will be nullptr
      * @since 5.5
      */
     virtual KWayland::Server::Display *waylandDisplay() const = 0;
 
     /**
      * Whether animations are supported by the Scene.
      * If this method returns @c false Effects are supposed to not
      * animate transitions.
      *
      * @returns Whether the Scene can drive animations
      * @since 5.8
      **/
     virtual bool animationsSupported() const = 0;
 
     /**
      * The current cursor image of the Platform.
      * @see cursorPos
      * @since 5.9
      **/
     virtual PlatformCursorImage cursorImage() const = 0;
 
     /**
      * The cursor image should be hidden.
      * @see showCursor
      * @since 5.9
      **/
     virtual void hideCursor() = 0;
 
     /**
      * The cursor image should be shown again after having been hidden..
      * @see hideCursor
      * @since 5.9
      **/
     virtual void showCursor() = 0;
 
     /**
      * Starts an interactive window selection process.
      *
      * Once the user selected a window the @p callback is invoked with the selected EffectWindow as
      * argument. In case the user cancels the interactive window selection or selecting a window is currently
      * not possible (e.g. screen locked) the @p callback is invoked with a @c nullptr argument.
      *
      * During the interactive window selection the cursor is turned into a crosshair cursor.
      *
      * @param callback The function to invoke once the interactive window selection ends
      * @since 5.9
      **/
     virtual void startInteractiveWindowSelection(std::function<void(KWin::EffectWindow*)> callback) = 0;
 
     /**
      * Starts an interactive position selection process.
      *
      * Once the user selected a position on the screen the @p callback is invoked with
      * the selected point as argument. In case the user cancels the interactive position selection
      * or selecting a position is currently not possible (e.g. screen locked) the @p callback
      * is invoked with a point at @c -1 as x and y argument.
      *
      * During the interactive window selection the cursor is turned into a crosshair cursor.
      *
      * @param callback The function to invoke once the interactive position selection ends
      * @since 5.9
      **/
     virtual void startInteractivePositionSelection(std::function<void(const QPoint &)> callback) = 0;
 
     /**
      * Shows an on-screen-message. To hide it again use @link{hideOnScreenMessage}.
      *
      * @param message The message to show
      * @param iconName The optional themed icon name
      * @see hideOnScreenMessage
      * @since 5.9
      **/
     virtual void showOnScreenMessage(const QString &message, const QString &iconName = QString()) = 0;
 
     /**
      * Flags for how to hide a shown on-screen-message
      * @see hideOnScreenMessage
      * @since 5.9
      **/
     enum class OnScreenMessageHideFlag {
         /**
          * The on-screen-message should skip the close window animation.
          * @see EffectWindow::skipsCloseAnimation
          **/
         SkipsCloseAnimation = 1
     };
     Q_DECLARE_FLAGS(OnScreenMessageHideFlags, OnScreenMessageHideFlag)
     /**
      * Hides a previously shown on-screen-message again.
      * @param flags The flags for how to hide the message
      * @see showOnScreenMessage
      * @since 5.9
      **/
     virtual void hideOnScreenMessage(OnScreenMessageHideFlags flags = OnScreenMessageHideFlags()) = 0;
 
 Q_SIGNALS:
     /**
      * Signal emitted when the current desktop changed.
      * @param oldDesktop The previously current desktop
      * @param newDesktop The new current desktop
      * @param with The window which is taken over to the new desktop, can be NULL
      * @since 4.9
      */
     void desktopChanged(int oldDesktop, int newDesktop, KWin::EffectWindow *with);
     /**
      * @since 4.7
      * @deprecated
      */
     void desktopChanged(int oldDesktop, int newDesktop);
     /**
      * Signal emitted when a window moved to another desktop
      * NOTICE that this does NOT imply that the desktop has changed
      * The @param window which is moved to the new desktop
      * @param oldDesktop The previous desktop of the window
      * @param newDesktop The new desktop of the window
      * @since 4.11.4
      */
     void desktopPresenceChanged(KWin::EffectWindow *window, int oldDesktop, int newDesktop);
     /**
     * Signal emitted when the number of currently existing desktops is changed.
     * @param old The previous number of desktops in used.
     * @see EffectsHandler::numberOfDesktops.
     * @since 4.7
     */
     void numberDesktopsChanged(uint old);
     /**
      * Signal emitted when the number of screens changed.
      * @since 5.0
      **/
     void numberScreensChanged();
     /**
      * Signal emitted when the desktop showing ("dashboard") state changed
      * The desktop is risen to the keepAbove layer, you may want to elevate
      * windows or such.
      * @since 5.3
      **/
     void showingDesktopChanged(bool);
     /**
      * Signal emitted when a new window has been added to the Workspace.
      * @param w The added window
      * @since 4.7
      **/
     void windowAdded(KWin::EffectWindow *w);
     /**
      * Signal emitted when a window is being removed from the Workspace.
      * An effect which wants to animate the window closing should connect
      * to this signal and reference the window by using
      * @link EffectWindow::refWindow
      * @param w The window which is being closed
      * @since 4.7
      **/
     void windowClosed(KWin::EffectWindow *w);
     /**
      * Signal emitted when a window get's activated.
      * @param w The new active window, or @c NULL if there is no active window.
      * @since 4.7
      **/
     void windowActivated(KWin::EffectWindow *w);
     /**
      * Signal emitted when a window is deleted.
      * This means that a closed window is not referenced any more.
      * An effect bookkeeping the closed windows should connect to this
      * signal to clean up the internal references.
      * @param w The window which is going to be deleted.
      * @see EffectWindow::refWindow
      * @see EffectWindow::unrefWindow
      * @see windowClosed
      * @since 4.7
      **/
     void windowDeleted(KWin::EffectWindow *w);
     /**
      * Signal emitted when a user begins a window move or resize operation.
      * To figure out whether the user resizes or moves the window use
      * @link EffectWindow::isUserMove or @link EffectWindow::isUserResize.
      * Whenever the geometry is updated the signal @link windowStepUserMovedResized
      * is emitted with the current geometry.
      * The move/resize operation ends with the signal @link windowFinishUserMovedResized.
      * Only one window can be moved/resized by the user at the same time!
      * @param w The window which is being moved/resized
      * @see windowStepUserMovedResized
      * @see windowFinishUserMovedResized
      * @see EffectWindow::isUserMove
      * @see EffectWindow::isUserResize
      * @since 4.7
      **/
     void windowStartUserMovedResized(KWin::EffectWindow *w);
     /**
      * Signal emitted during a move/resize operation when the user changed the geometry.
      * Please note: KWin supports two operation modes. In one mode all changes are applied
      * instantly. This means the window's geometry matches the passed in @p geometry. In the
      * other mode the geometry is changed after the user ended the move/resize mode.
      * The @p geometry differs from the window's geometry. Also the window's pixmap still has
      * the same size as before. Depending what the effect wants to do it would be recommended
      * to scale/translate the window.
      * @param w The window which is being moved/resized
      * @param geometry The geometry of the window in the current move/resize step.
      * @see windowStartUserMovedResized
      * @see windowFinishUserMovedResized
      * @see EffectWindow::isUserMove
      * @see EffectWindow::isUserResize
      * @since 4.7
      **/
     void windowStepUserMovedResized(KWin::EffectWindow *w, const QRect &geometry);
     /**
      * Signal emitted when the user finishes move/resize of window @p w.
      * @param w The window which has been moved/resized
      * @see windowStartUserMovedResized
      * @see windowFinishUserMovedResized
      * @since 4.7
      **/
     void windowFinishUserMovedResized(KWin::EffectWindow *w);
     /**
      * Signal emitted when the maximized state of the window @p w changed.
      * A window can be in one of four states:
      * @li restored: both @p horizontal and @p vertical are @c false
      * @li horizontally maximized: @p horizontal is @c true and @p vertical is @c false
      * @li vertically maximized: @p horizontal is @c false and @p vertical is @c true
      * @li completely maximized: both @p horizontal and @p vertical are @C true
      * @param w The window whose maximized state changed
      * @param horizontal If @c true maximized horizontally
      * @param vertical If @c true maximized vertically
      * @since 4.7
      **/
     void windowMaximizedStateChanged(KWin::EffectWindow *w, bool horizontal, bool vertical);
     /**
      * Signal emitted when the geometry or shape of a window changed.
      * This is caused if the window changes geometry without user interaction.
      * E.g. the decoration is changed. This is in opposite to windowUserMovedResized
      * which is caused by direct user interaction.
      * @param w The window whose geometry changed
      * @param old The previous geometry
      * @see windowUserMovedResized
      * @since 4.7
      **/
     void windowGeometryShapeChanged(KWin::EffectWindow *w, const QRect &old);
     /**
      * Signal emitted when the padding of a window changed. (eg. shadow size)
      * @param w The window whose geometry changed
      * @param old The previous expandedGeometry()
      * @since 4.9
      **/
     void windowPaddingChanged(KWin::EffectWindow *w, const QRect &old);
     /**
      * Signal emitted when the windows opacity is changed.
      * @param w The window whose opacity level is changed.
      * @param oldOpacity The previous opacity level
      * @param newOpacity The new opacity level
      * @since 4.7
      **/
     void windowOpacityChanged(KWin::EffectWindow *w, qreal oldOpacity, qreal newOpacity);
     /**
      * Signal emitted when a window got minimized.
      * @param w The window which was minimized
      * @since 4.7
      **/
     void windowMinimized(KWin::EffectWindow *w);
     /**
      * Signal emitted when a window got unminimized.
      * @param w The window which was unminimized
      * @since 4.7
      **/
     void windowUnminimized(KWin::EffectWindow *w);
     /**
      * Signal emitted when a window either becomes modal (ie. blocking for its main client) or looses that state.
      * @param w The window which was unminimized
      * @since 4.11
      **/
     void windowModalityChanged(KWin::EffectWindow *w);
+    /**
+     * Signal emitted when a window either became unresponsive (eg. app froze or crashed)
+     * or respoonsive
+     * @param w The window that became (un)responsive
+     * @param unresponsive Whether the window is responsive or unresponsive
+     * @since 5.10
+     */
+    void windowUnresponsiveChanged(KWin::EffectWindow *w, bool unresponsive);
     /**
      * Signal emitted when an area of a window is scheduled for repainting.
      * Use this signal in an effect if another area needs to be synced as well.
      * @param w The window which is scheduled for repainting
      * @param r Always empty.
      * @since 4.7
      **/
     void windowDamaged(KWin::EffectWindow *w, const QRect &r);
     /**
      * Signal emitted when a tabbox is added.
      * An effect who wants to replace the tabbox with itself should use @link refTabBox.
      * @param mode The TabBoxMode.
      * @see refTabBox
      * @see tabBoxClosed
      * @see tabBoxUpdated
      * @see tabBoxKeyEvent
      * @since 4.7
      **/
     void tabBoxAdded(int mode);
     /**
      * Signal emitted when the TabBox was closed by KWin core.
      * An effect which referenced the TabBox should use @link unrefTabBox to unref again.
      * @see unrefTabBox
      * @see tabBoxAdded
      * @since 4.7
      **/
     void tabBoxClosed();
     /**
      * Signal emitted when the selected TabBox window changed or the TabBox List changed.
      * An effect should only response to this signal if it referenced the TabBox with @link refTabBox.
      * @see refTabBox
      * @see currentTabBoxWindowList
      * @see currentTabBoxDesktopList
      * @see currentTabBoxWindow
      * @see currentTabBoxDesktop
      * @since 4.7
      **/
     void tabBoxUpdated();
     /**
      * Signal emitted when a key event, which is not handled by TabBox directly is, happens while
      * TabBox is active. An effect might use the key event to e.g. change the selected window.
      * An effect should only response to this signal if it referenced the TabBox with @link refTabBox.
      * @param event The key event not handled by TabBox directly
      * @see refTabBox
      * @since 4.7
      **/
     void tabBoxKeyEvent(QKeyEvent* event);
     void currentTabAboutToChange(KWin::EffectWindow* from, KWin::EffectWindow* to);
     void tabAdded(KWin::EffectWindow* from, KWin::EffectWindow* to);   // from merged with to
     void tabRemoved(KWin::EffectWindow* c, KWin::EffectWindow* group);   // c removed from group
     /**
      * Signal emitted when mouse changed.
      * If an effect needs to get updated mouse positions, it needs to first call @link startMousePolling.
      * For a fullscreen effect it is better to use an input window and react on @link windowInputMouseEvent.
      * @param pos The new mouse position
      * @param oldpos The previously mouse position
      * @param buttons The pressed mouse buttons
      * @param oldbuttons The previously pressed mouse buttons
      * @param modifiers Pressed keyboard modifiers
      * @param oldmodifiers Previously pressed keyboard modifiers.
      * @see startMousePolling
      * @since 4.7
      **/
     void mouseChanged(const QPoint& pos, const QPoint& oldpos,
                               Qt::MouseButtons buttons, Qt::MouseButtons oldbuttons,
                               Qt::KeyboardModifiers modifiers, Qt::KeyboardModifiers oldmodifiers);
     /**
      * Signal emitted when the cursor shape changed.
      * You'll likely want to query the current cursor as reaction: xcb_xfixes_get_cursor_image_unchecked
      * Connection to this signal is tracked, so if you don't need it anymore, disconnect from it to stop cursor event filtering
      */
     void cursorShapeChanged();
     /**
      * Receives events registered for using @link registerPropertyType.
      * Use readProperty() to get the property data.
      * Note that the property may be already set on the window, so doing the same
      * processing from windowAdded() (e.g. simply calling propertyNotify() from it)
      * is usually needed.
      * @param w The window whose property changed, is @c null if it is a root window property
      * @param atom The property
      * @since 4.7
      */
     void propertyNotify(KWin::EffectWindow* w, long atom);
 
     /**
      * Signal emitted after the screen geometry changed (e.g. add of a monitor).
      * Effects using displayWidth()/displayHeight() to cache information should
      * react on this signal and update the caches.
      * @param size The new screen size
      * @since 4.8
      **/
     void screenGeometryChanged(const QSize &size);
 
     /**
      * This signal is emitted when the global
      * activity is changed
      * @param id id of the new current activity
      * @since 4.9
      **/
     void currentActivityChanged(const QString &id);
     /**
      * This signal is emitted when a new activity is added
      * @param id id of the new activity
      * @since 4.9
      */
     void activityAdded(const QString &id);
     /**
      * This signal is emitted when the activity
      * is removed
      * @param id id of the removed activity
      * @since 4.9
      */
     void activityRemoved(const QString &id);
     /**
      * This signal is emitted when the screen got locked or unlocked.
      * @param locked @c true if the screen is now locked, @c false if it is now unlocked
      * @since 4.11
      **/
     void screenLockingChanged(bool locked);
 
     /**
      * This signels is emitted when ever the stacking order is change, ie. a window is risen
      * or lowered
      * @since 4.10
      */
     void stackingOrderChanged();
     /**
      * This signal is emitted when the user starts to approach the @p border with the mouse.
      * The @p factor describes how far away the mouse is in a relative mean. The values are in
      * [0.0, 1.0] with 0.0 being emitted when first entered and on leaving. The value 1.0 means that
      * the @p border is reached with the mouse. So the values are well suited for animations.
      * The signal is always emitted when the mouse cursor position changes.
      * @param border The screen edge which is being approached
      * @param factor Value in range [0.0,1.0] to describe how close the mouse is to the border
      * @param geometry The geometry of the edge which is being approached
      * @since 4.11
      **/
     void screenEdgeApproaching(ElectricBorder border, qreal factor, const QRect &geometry);
     /**
      * Emitted whenever the virtualScreenSize changes.
      * @see virtualScreenSize()
      * @since 5.0
      **/
     void virtualScreenSizeChanged();
     /**
      * Emitted whenever the virtualScreenGeometry changes.
      * @see virtualScreenGeometry()
      * @since 5.0
      **/
     void virtualScreenGeometryChanged();
 
     /**
      * The window @p w gets shown again. The window was previously
      * initially shown with @link{windowAdded} and hidden with @link{windowHidden}.
      *
      * @see windowHidden
      * @see windowAdded
      * @since 5.8
      **/
     void windowShown(KWin::EffectWindow *w);
 
     /**
      * The window @p w got hidden but not yet closed.
      * This can happen when a window is still being used and is supposed to be shown again
      * with @link{windowShown}. On X11 an example is autohiding panels. On Wayland every
      * window first goes through the window hidden state and might get shown again, or might
      * get closed the normal way.
      *
      * @see windowShown
      * @see windowClosed
      * @since 5.8
      **/
     void windowHidden(KWin::EffectWindow *w);
 
     /**
      * This signal gets emitted when the data on EffectWindow @p w for @p role changed.
      *
      * An Effect can connect to this signal to read the new value and react on it.
      * E.g. an Effect which does not operate on windows grabbed by another Effect wants
      * to cancel the already scheduled animation if another Effect adds a grab.
      *
      * @param w The EffectWindow for which the data changed
      * @param role The data role which changed
      * @see EffectWindow::setData
      * @see EffectWindow::data
      * @since 5.8.4
      **/
     void windowDataChanged(KWin::EffectWindow *w, int role);
 
 protected:
     QVector< EffectPair > loaded_effects;
     //QHash< QString, EffectFactory* > effect_factories;
     CompositingType compositing_type;
 };
 
 
 /**
  * @short Representation of a window used by/for Effect classes.
  *
  * The purpose is to hide internal data and also to serve as a single
  *  representation for the case when Client/Unmanaged becomes Deleted.
  **/
 class KWINEFFECTS_EXPORT EffectWindow : public QObject
 {
     Q_OBJECT
     Q_PROPERTY(bool alpha READ hasAlpha CONSTANT)
     Q_PROPERTY(QRect geometry READ geometry)
     Q_PROPERTY(QRect expandedGeometry READ expandedGeometry)
     Q_PROPERTY(int height READ height)
     Q_PROPERTY(qreal opacity READ opacity)
     Q_PROPERTY(QPoint pos READ pos)
     Q_PROPERTY(int screen READ screen)
     Q_PROPERTY(QSize size READ size)
     Q_PROPERTY(int width READ width)
     Q_PROPERTY(int x READ x)
     Q_PROPERTY(int y READ y)
     Q_PROPERTY(int desktop READ desktop)
     Q_PROPERTY(bool onAllDesktops READ isOnAllDesktops)
     Q_PROPERTY(bool onCurrentDesktop READ isOnCurrentDesktop)
     Q_PROPERTY(QRect rect READ rect)
     Q_PROPERTY(QString windowClass READ windowClass)
     Q_PROPERTY(QString windowRole READ windowRole)
     /**
      * Returns whether the window is a desktop background window (the one with wallpaper).
      * See _NET_WM_WINDOW_TYPE_DESKTOP at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool desktopWindow READ isDesktop)
     /**
      * Returns whether the window is a dock (i.e. a panel).
      * See _NET_WM_WINDOW_TYPE_DOCK at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool dock READ isDock)
     /**
      * Returns whether the window is a standalone (detached) toolbar window.
      * See _NET_WM_WINDOW_TYPE_TOOLBAR at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool toolbar READ isToolbar)
     /**
      * Returns whether the window is a torn-off menu.
      * See _NET_WM_WINDOW_TYPE_MENU at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool menu READ isMenu)
     /**
      * Returns whether the window is a "normal" window, i.e. an application or any other window
      * for which none of the specialized window types fit.
      * See _NET_WM_WINDOW_TYPE_NORMAL at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool normalWindow READ isNormalWindow)
     /**
      * Returns whether the window is a dialog window.
      * See _NET_WM_WINDOW_TYPE_DIALOG at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool dialog READ isDialog)
     /**
      * Returns whether the window is a splashscreen. Note that many (especially older) applications
      * do not support marking their splash windows with this type.
      * See _NET_WM_WINDOW_TYPE_SPLASH at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool splash READ isSplash)
     /**
      * Returns whether the window is a utility window, such as a tool window.
      * See _NET_WM_WINDOW_TYPE_UTILITY at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool utility READ isUtility)
     /**
      * Returns whether the window is a dropdown menu (i.e. a popup directly or indirectly open
      * from the applications menubar).
      * See _NET_WM_WINDOW_TYPE_DROPDOWN_MENU at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool dropdownMenu READ isDropdownMenu)
     /**
      * Returns whether the window is a popup menu (that is not a torn-off or dropdown menu).
      * See _NET_WM_WINDOW_TYPE_POPUP_MENU at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool popupMenu READ isPopupMenu)
     /**
      * Returns whether the window is a tooltip.
      * See _NET_WM_WINDOW_TYPE_TOOLTIP at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool tooltip READ isTooltip)
     /**
      * Returns whether the window is a window with a notification.
      * See _NET_WM_WINDOW_TYPE_NOTIFICATION at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool notification READ isNotification)
     /**
      * Returns whether the window is an on screen display window
      * using the non-standard _KDE_NET_WM_WINDOW_TYPE_ON_SCREEN_DISPLAY
      */
     Q_PROPERTY(bool onScreenDisplay READ isOnScreenDisplay)
     /**
      * Returns whether the window is a combobox popup.
      * See _NET_WM_WINDOW_TYPE_COMBO at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool comboBox READ isComboBox)
     /**
      * Returns whether the window is a Drag&Drop icon.
      * See _NET_WM_WINDOW_TYPE_DND at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(bool dndIcon READ isDNDIcon)
     /**
      * Returns the NETWM window type
      * See http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     Q_PROPERTY(int windowType READ windowType)
     /**
      * Whether this EffectWindow is managed by KWin (it has control over its placement and other
      * aspects, as opposed to override-redirect windows that are entirely handled by the application).
      **/
     Q_PROPERTY(bool managed READ isManaged)
     /**
      * Whether this EffectWindow represents an already deleted window and only kept for the compositor for animations.
      **/
     Q_PROPERTY(bool deleted READ isDeleted)
     /**
      * Whether the window has an own shape
      **/
     Q_PROPERTY(bool shaped READ hasOwnShape)
     /**
      * The Window's shape
      **/
     Q_PROPERTY(QRegion shape READ shape)
     /**
      * The Caption of the window. Read from WM_NAME property together with a suffix for hostname and shortcut.
      **/
     Q_PROPERTY(QString caption READ caption)
     /**
      * Whether the window is set to be kept above other windows.
      **/
     Q_PROPERTY(bool keepAbove READ keepAbove)
     /**
      * Whether the window is minimized.
      **/
     Q_PROPERTY(bool minimized READ isMinimized WRITE setMinimized)
     /**
      * Whether the window represents a modal window.
      **/
     Q_PROPERTY(bool modal READ isModal)
     /**
      * Whether the window is moveable. Even if it is not moveable, it might be possible to move
      * it to another screen.
      * @see moveableAcrossScreens
      **/
     Q_PROPERTY(bool moveable READ isMovable)
     /**
      * Whether the window can be moved to another screen.
      * @see moveable
      **/
     Q_PROPERTY(bool moveableAcrossScreens READ isMovableAcrossScreens)
     /**
      * By how much the window wishes to grow/shrink at least. Usually QSize(1,1).
      * MAY BE DISOBEYED BY THE WM! It's only for information, do NOT rely on it at all.
      */
     Q_PROPERTY(QSize basicUnit READ basicUnit)
     /**
      * Whether the window is currently being moved by the user.
      **/
     Q_PROPERTY(bool move READ isUserMove)
     /**
      * Whether the window is currently being resized by the user.
      **/
     Q_PROPERTY(bool resize READ isUserResize)
     /**
      * The optional geometry representing the minimized Client in e.g a taskbar.
      * See _NET_WM_ICON_GEOMETRY at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      **/
     Q_PROPERTY(QRect iconGeometry READ iconGeometry)
     /**
      * Returns whether the window is any of special windows types (desktop, dock, splash, ...),
      * i.e. window types that usually don't have a window frame and the user does not use window
      * management (moving, raising,...) on them.
      **/
     Q_PROPERTY(bool specialWindow READ isSpecialWindow)
     Q_PROPERTY(QIcon icon READ icon)
     /**
      * Whether the window should be excluded from window switching effects.
      **/
     Q_PROPERTY(bool skipSwitcher READ isSkipSwitcher)
     /**
      * Geometry of the actual window contents inside the whole (including decorations) window.
      */
     Q_PROPERTY(QRect contentsRect READ contentsRect)
     /**
      * Geometry of the transparent rect in the decoration.
      * May be different from contentsRect if the decoration is extended into the client area.
      */
     Q_PROPERTY(QRect decorationInnerRect READ decorationInnerRect)
     Q_PROPERTY(bool hasDecoration READ hasDecoration)
     Q_PROPERTY(QStringList activities READ activities)
     Q_PROPERTY(bool onCurrentActivity READ isOnCurrentActivity)
     Q_PROPERTY(bool onAllActivities READ isOnAllActivities)
     /**
      * Whether the decoration currently uses an alpha channel.
      * @since 4.10
      **/
     Q_PROPERTY(bool decorationHasAlpha READ decorationHasAlpha)
     /**
      * Whether the window is currently visible to the user, that is:
      * <ul>
      * <li>Not minimized</li>
      * <li>On current desktop</li>
      * <li>On current activity</li>
      * </ul>
      * @since 4.11
      **/
     Q_PROPERTY(bool visible READ isVisible)
     /**
      * Whether the window does not want to be animated on window close.
      * In case this property is @c true it is not useful to start an animation on window close.
      * The window will not be visible, but the animation hooks are executed.
      * @since 5.0
      **/
     Q_PROPERTY(bool skipsCloseAnimation READ skipsCloseAnimation)
 
     /**
      * Interface to the corresponding wayland surface.
      * relevant only in Wayland, on X11 it will be nullptr
      */
     Q_PROPERTY(KWayland::Server::SurfaceInterface *surface READ surface)
 
     /**
      * Whether the window is fullscreen.
      * @since 5.6
      **/
     Q_PROPERTY(bool fullScreen READ isFullScreen)
+
+    /**
+     * Whether this client is unresponsive.
+     *
+     * When an application failed to react on a ping request in time, it is
+     * considered unresponsive. This usually indicates that the application froze or crashed.
+     *
+     * @since 5.10
+     */
+    Q_PROPERTY(bool unresponsive READ isUnresponsive)
 public:
     /**  Flags explaining why painting should be disabled  */
     enum {
         /**  Window will not be painted  */
         PAINT_DISABLED                 = 1 << 0,
         /**  Window will not be painted because it is deleted  */
         PAINT_DISABLED_BY_DELETE       = 1 << 1,
         /**  Window will not be painted because of which desktop it's on  */
         PAINT_DISABLED_BY_DESKTOP      = 1 << 2,
         /**  Window will not be painted because it is minimized  */
         PAINT_DISABLED_BY_MINIMIZE     = 1 << 3,
         /**  Window will not be painted because it is not the active window in a client group  */
         PAINT_DISABLED_BY_TAB_GROUP = 1 << 4,
         /**  Window will not be painted because it's not on the current activity  */
         PAINT_DISABLED_BY_ACTIVITY     = 1 << 5
     };
 
     explicit EffectWindow(QObject *parent = nullptr);
     virtual ~EffectWindow();
 
     virtual void enablePainting(int reason) = 0;
     virtual void disablePainting(int reason) = 0;
     virtual bool isPaintingEnabled() = 0;
     Q_SCRIPTABLE void addRepaint(const QRect& r);
     Q_SCRIPTABLE void addRepaint(int x, int y, int w, int h);
     Q_SCRIPTABLE void addRepaintFull();
     Q_SCRIPTABLE void addLayerRepaint(const QRect& r);
     Q_SCRIPTABLE void addLayerRepaint(int x, int y, int w, int h);
 
     virtual void refWindow() = 0;
     virtual void unrefWindow() = 0;
     bool isDeleted() const;
 
     bool isMinimized() const;
     double opacity() const;
     bool hasAlpha() const;
 
     bool isOnCurrentActivity() const;
     Q_SCRIPTABLE bool isOnActivity(QString id) const;
     bool isOnAllActivities() const;
     QStringList activities() const;
 
     bool isOnDesktop(int d) const;
     bool isOnCurrentDesktop() const;
     bool isOnAllDesktops() const;
     int desktop() const; // prefer isOnXXX()
 
     int x() const;
     int y() const;
     int width() const;
     int height() const;
     /**
      * By how much the window wishes to grow/shrink at least. Usually QSize(1,1).
      * MAY BE DISOBEYED BY THE WM! It's only for information, do NOT rely on it at all.
      */
     QSize basicUnit() const;
     QRect geometry() const;
     /**
      * Geometry of the window including decoration and potentially shadows.
      * May be different from geometry() if the window has a shadow.
      * @since 4.9
      */
     QRect expandedGeometry() const;
     virtual QRegion shape() const = 0;
     int screen() const;
     /** @internal Do not use */
     bool hasOwnShape() const; // only for shadow effect, for now
     QPoint pos() const;
     QSize size() const;
     QRect rect() const;
     bool isMovable() const;
     bool isMovableAcrossScreens() const;
     bool isUserMove() const;
     bool isUserResize() const;
     QRect iconGeometry() const;
 
     /**
      * Geometry of the actual window contents inside the whole (including decorations) window.
      */
     QRect contentsRect() const;
     /**
      * Geometry of the transparent rect in the decoration.
      * May be different from contentsRect() if the decoration is extended into the client area.
      * @since 4.5
      */
     virtual QRect decorationInnerRect() const = 0;
     bool hasDecoration() const;
     bool decorationHasAlpha() const;
     virtual QByteArray readProperty(long atom, long type, int format) const = 0;
     virtual void deleteProperty(long atom) const = 0;
 
     QString caption() const;
     QIcon icon() const;
     QString windowClass() const;
     QString windowRole() const;
     virtual const EffectWindowGroup* group() const = 0;
 
     /**
      * Returns whether the window is a desktop background window (the one with wallpaper).
      * See _NET_WM_WINDOW_TYPE_DESKTOP at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isDesktop() const;
     /**
      * Returns whether the window is a dock (i.e. a panel).
      * See _NET_WM_WINDOW_TYPE_DOCK at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isDock() const;
     /**
      * Returns whether the window is a standalone (detached) toolbar window.
      * See _NET_WM_WINDOW_TYPE_TOOLBAR at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isToolbar() const;
     /**
      * Returns whether the window is a torn-off menu.
      * See _NET_WM_WINDOW_TYPE_MENU at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isMenu() const;
     /**
      * Returns whether the window is a "normal" window, i.e. an application or any other window
      * for which none of the specialized window types fit.
      * See _NET_WM_WINDOW_TYPE_NORMAL at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isNormalWindow() const; // normal as in 'NET::Normal or NET::Unknown non-transient'
     /**
      * Returns whether the window is any of special windows types (desktop, dock, splash, ...),
      * i.e. window types that usually don't have a window frame and the user does not use window
      * management (moving, raising,...) on them.
      */
     bool isSpecialWindow() const;
     /**
      * Returns whether the window is a dialog window.
      * See _NET_WM_WINDOW_TYPE_DIALOG at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isDialog() const;
     /**
      * Returns whether the window is a splashscreen. Note that many (especially older) applications
      * do not support marking their splash windows with this type.
      * See _NET_WM_WINDOW_TYPE_SPLASH at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isSplash() const;
     /**
      * Returns whether the window is a utility window, such as a tool window.
      * See _NET_WM_WINDOW_TYPE_UTILITY at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isUtility() const;
     /**
      * Returns whether the window is a dropdown menu (i.e. a popup directly or indirectly open
      * from the applications menubar).
      * See _NET_WM_WINDOW_TYPE_DROPDOWN_MENU at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isDropdownMenu() const;
     /**
      * Returns whether the window is a popup menu (that is not a torn-off or dropdown menu).
      * See _NET_WM_WINDOW_TYPE_POPUP_MENU at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isPopupMenu() const; // a context popup, not dropdown, not torn-off
     /**
      * Returns whether the window is a tooltip.
      * See _NET_WM_WINDOW_TYPE_TOOLTIP at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isTooltip() const;
     /**
      * Returns whether the window is a window with a notification.
      * See _NET_WM_WINDOW_TYPE_NOTIFICATION at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isNotification() const;
     /**
      * Returns whether the window is an on screen display window
      * using the non-standard _KDE_NET_WM_WINDOW_TYPE_ON_SCREEN_DISPLAY
      */
     bool isOnScreenDisplay() const;
     /**
      * Returns whether the window is a combobox popup.
      * See _NET_WM_WINDOW_TYPE_COMBO at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isComboBox() const;
     /**
      * Returns whether the window is a Drag&Drop icon.
      * See _NET_WM_WINDOW_TYPE_DND at http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     bool isDNDIcon() const;
     /**
      * Returns the NETWM window type
      * See http://standards.freedesktop.org/wm-spec/wm-spec-latest.html .
      */
     NET::WindowType windowType() const;
     /**
      * Returns whether the window is managed by KWin (it has control over its placement and other
      * aspects, as opposed to override-redirect windows that are entirely handled by the application).
      */
     bool isManaged() const; // whether it's managed or override-redirect
     /**
      * Returns whether or not the window can accept keyboard focus.
      */
     bool acceptsFocus() const;
     /**
      * Returns whether or not the window is kept above all other windows.
      */
     bool keepAbove() const;
 
     bool isModal() const;
     Q_SCRIPTABLE virtual KWin::EffectWindow* findModal() = 0;
     Q_SCRIPTABLE virtual QList<KWin::EffectWindow*> mainWindows() const = 0;
 
     /**
     * Returns whether the window should be excluded from window switching effects.
     * @since 4.5
     */
     bool isSkipSwitcher() const;
 
     /**
      * Returns the unmodified window quad list. Can also be used to force rebuilding.
      */
     virtual WindowQuadList buildQuads(bool force = false) const = 0;
 
     void setMinimized(bool minimize);
     void minimize();
     void unminimize();
     Q_SCRIPTABLE void closeWindow() const;
 
     bool isCurrentTab() const;
 
     /**
      * @since 4.11
      **/
     bool isVisible() const;
 
     /**
      * @since 5.0
      **/
     bool skipsCloseAnimation() const;
 
     /**
      * @since 5.5
      */
     KWayland::Server::SurfaceInterface *surface() const;
 
     /**
      * @since 5.6
      **/
     bool isFullScreen() const;
 
+    /**
+     * @since 5.10
+     */
+    bool isUnresponsive() const;
+
     /**
      * Can be used to by effects to store arbitrary data in the EffectWindow.
      *
      * Invoking this method will emit the signal EffectsHandler::windowDataChanged.
      * @see EffectsHandler::windowDataChanged
      */
     Q_SCRIPTABLE virtual void setData(int role, const QVariant &data) = 0;
     Q_SCRIPTABLE virtual QVariant data(int role) const = 0;
 
     /**
      * @brief References the previous window pixmap to prevent discarding.
      *
      * This method allows to reference the previous window pixmap in case that a window changed
      * its size, which requires a new window pixmap. By referencing the previous (and then outdated)
      * window pixmap an effect can for example cross fade the current window pixmap with the previous
      * one. This allows for smoother transitions for window geometry changes.
      *
      * If an effect calls this method on a window it also needs to call @link unreferencePreviousWindowPixmap
      * once it does no longer need the previous window pixmap.
      *
      * Note: the window pixmap is not kept forever even when referenced. If the geometry changes again, so that
      * a new window pixmap is created, the previous window pixmap will be exchanged with the current one. This
      * means it's still possible to have rendering glitches. An effect is supposed to track for itself the changes
      * to the window's geometry and decide how the transition should continue in such a situation.
      *
      * @see unreferencePreviousWindowPixmap
      * @since 4.11
      */
     virtual void referencePreviousWindowPixmap() = 0;
     /**
      * @brief Unreferences the previous window pixmap. Only relevant after @link referencePreviousWindowPixmap had
      * been called.
      *
      * @see referencePreviousWindowPixmap
      * @since 4.11
      */
     virtual void unreferencePreviousWindowPixmap() = 0;
 };
 
 class KWINEFFECTS_EXPORT EffectWindowGroup
 {
 public:
     virtual ~EffectWindowGroup();
     virtual EffectWindowList members() const = 0;
 };
 
 
 struct GLVertex2D
 {
     QVector2D position;
     QVector2D texcoord;
 };
 
 struct GLVertex3D
 {
     QVector3D position;
     QVector2D texcoord;
 };
 
 
 /**
  * @short Vertex class
  *
  * A vertex is one position in a window. WindowQuad consists of four WindowVertex objects
  * and represents one part of a window.
  **/
 class KWINEFFECTS_EXPORT WindowVertex
 {
 public:
     WindowVertex();
     WindowVertex(double x, double y, double tx, double ty);
 
     double x() const { return px; }
     double y() const { return py; }
     double u() const { return tx; }
     double v() const { return ty; }
     double originalX() const { return ox; }
     double originalY() const { return oy; }
     double textureX() const { return tx; }
     double textureY() const { return ty; }
     void move(double x, double y);
     void setX(double x);
     void setY(double y);
 
 private:
     friend class WindowQuad;
     friend class WindowQuadList;
     double px, py; // position
     double ox, oy; // origional position
     double tx, ty; // texture coords
 };
 
 /**
  * @short Class representing one area of a window.
  *
  * WindowQuads consists of four WindowVertex objects and represents one part of a window.
  */
 // NOTE: This class expects the (original) vertices to be in the clockwise order starting from topleft.
 class KWINEFFECTS_EXPORT WindowQuad
 {
 public:
     explicit WindowQuad(WindowQuadType type, int id = -1);
     WindowQuad makeSubQuad(double x1, double y1, double x2, double y2) const;
     WindowVertex& operator[](int index);
     const WindowVertex& operator[](int index) const;
     WindowQuadType type() const;
     void setUVAxisSwapped(bool value) { uvSwapped = value; }
     bool uvAxisSwapped() const { return uvSwapped; }
     int id() const;
     bool decoration() const;
     bool effect() const;
     double left() const;
     double right() const;
     double top() const;
     double bottom() const;
     double originalLeft() const;
     double originalRight() const;
     double originalTop() const;
     double originalBottom() const;
     bool smoothNeeded() const;
     bool isTransformed() const;
 private:
     friend class WindowQuadList;
     WindowVertex verts[ 4 ];
     WindowQuadType quadType; // 0 - contents, 1 - decoration
     bool uvSwapped;
     int quadID;
 };
 
 class KWINEFFECTS_EXPORT WindowQuadList
     : public QList< WindowQuad >
 {
 public:
     WindowQuadList splitAtX(double x) const;
     WindowQuadList splitAtY(double y) const;
     WindowQuadList makeGrid(int maxquadsize) const;
     WindowQuadList makeRegularGrid(int xSubdivisions, int ySubdivisions) const;
     WindowQuadList select(WindowQuadType type) const;
     WindowQuadList filterOut(WindowQuadType type) const;
     bool smoothNeeded() const;
     void makeInterleavedArrays(unsigned int type, GLVertex2D *vertices, const QMatrix4x4 &matrix) const;
     void makeArrays(float** vertices, float** texcoords, const QSizeF &size, bool yInverted) const;
     bool isTransformed() const;
 };
 
 class KWINEFFECTS_EXPORT WindowPrePaintData
 {
 public:
     int mask;
     /**
      * Region that will be painted, in screen coordinates.
      **/
     QRegion paint;
     /**
      * The clip region will be subtracted from paint region of following windows.
      * I.e. window will definitely cover it's clip region
      **/
     QRegion clip;
     WindowQuadList quads;
     /**
      * Simple helper that sets data to say the window will be painted as non-opaque.
      * Takes also care of changing the regions.
      */
     void setTranslucent();
     /**
      * Helper to mark that this window will be transformed
      **/
     void setTransformed();
 };
 
 class KWINEFFECTS_EXPORT PaintData
 {
 public:
     virtual ~PaintData();
     /**
      * @returns scale factor in X direction.
      * @since 4.10
      **/
     qreal xScale() const;
     /**
      * @returns scale factor in Y direction.
      * @since 4.10
      **/
     qreal yScale() const;
     /**
      * @returns scale factor in Z direction.
      * @since 4.10
      **/
     qreal zScale() const;
     /**
      * Sets the scale factor in X direction to @p scale
      * @param scale The scale factor in X direction
      * @since 4.10
      **/
     void setXScale(qreal scale);
     /**
      * Sets the scale factor in Y direction to @p scale
      * @param scale The scale factor in Y direction
      * @since 4.10
      **/
     void setYScale(qreal scale);
     /**
      * Sets the scale factor in Z direction to @p scale
      * @param scale The scale factor in Z direction
      * @since 4.10
      **/
     void setZScale(qreal scale);
     /**
      * Sets the scale factor in X and Y direction.
      * @param scale The scale factor for X and Y direction
      * @since 4.10
      **/
     void setScale(const QVector2D &scale);
     /**
      * Sets the scale factor in X, Y and Z direction
      * @param scale The scale factor for X, Y and Z direction
      * @since 4.10
      **/
     void setScale(const QVector3D &scale);
     const QGraphicsScale &scale() const;
     const QVector3D &translation() const;
     /**
      * @returns the translation in X direction.
      * @since 4.10
      **/
     qreal xTranslation() const;
     /**
      * @returns the translation in Y direction.
      * @since 4.10
      **/
     qreal yTranslation() const;
     /**
      * @returns the translation in Z direction.
      * @since 4.10
      **/
     qreal zTranslation() const;
     /**
      * Sets the translation in X direction to @p translate.
      * @since 4.10
      **/
     void setXTranslation(qreal translate);
     /**
      * Sets the translation in Y direction to @p translate.
      * @since 4.10
      **/
     void setYTranslation(qreal translate);
     /**
      * Sets the translation in Z direction to @p translate.
      * @since 4.10
      **/
     void setZTranslation(qreal translate);
     /**
      * Performs a translation by adding the values component wise.
      * @param x Translation in X direction
      * @param y Translation in Y direction
      * @param z Translation in Z direction
      * @since 4.10
      **/
     void translate(qreal x, qreal y = 0.0, qreal z = 0.0);
     /**
      * Performs a translation by adding the values component wise.
      * Overloaded method for convenience.
      * @param translate The translation
      * @since 4.10
      **/
     void translate(const QVector3D &translate);
 
     /**
      * Sets the rotation angle.
      * @param angle The new rotation angle.
      * @since 4.10
      * @see rotationAngle()
      **/
     void setRotationAngle(qreal angle);
     /**
      * Returns the rotation angle.
      * Initially 0.0.
      * @returns The current rotation angle.
      * @since 4.10
      * @see setRotationAngle
      **/
     qreal rotationAngle() const;
     /**
      * Sets the rotation origin.
      * @param origin The new rotation origin.
      * @since 4.10
      * @see rotationOrigin()
      **/
     void setRotationOrigin(const QVector3D &origin);
     /**
      * Returns the rotation origin. That is the point in space which is fixed during the rotation.
      * Initially this is 0/0/0.
      * @returns The rotation's origin
      * @since 4.10
      * @see setRotationOrigin()
      **/
     QVector3D rotationOrigin() const;
     /**
      * Sets the rotation axis.
      * Set a component to 1.0 to rotate around this axis and to 0.0 to disable rotation around the
      * axis.
      * @param axis A vector holding information on which axis to rotate
      * @since 4.10
      * @see rotationAxis()
      **/
     void setRotationAxis(const QVector3D &axis);
     /**
      * Sets the rotation axis.
      * Overloaded method for convenience.
      * @param axis The axis around which should be rotated.
      * @since 4.10
      * @see rotationAxis()
      **/
     void setRotationAxis(Qt::Axis axis);
     /**
      * The current rotation axis.
      * By default the rotation is (0/0/1) which means a rotation around the z axis.
      * @returns The current rotation axis.
      * @since 4.10
      * @see setRotationAxis
      **/
     QVector3D rotationAxis() const;
 
 protected:
     PaintData();
     PaintData(const PaintData &other);
 
 private:
     PaintDataPrivate * const d;
 };
 
 class KWINEFFECTS_EXPORT WindowPaintData : public PaintData
 {
 public:
     explicit WindowPaintData(EffectWindow* w);
     explicit WindowPaintData(EffectWindow* w, const QMatrix4x4 &screenProjectionMatrix);
     WindowPaintData(const WindowPaintData &other);
     virtual ~WindowPaintData();
     /**
      * Scales the window by @p scale factor.
      * Multiplies all three components by the given factor.
      * @since 4.10
      **/
     WindowPaintData& operator*=(qreal scale);
     /**
      * Scales the window by @p scale factor.
      * Performs a component wise multiplication on x and y components.
      * @since 4.10
      **/
     WindowPaintData& operator*=(const QVector2D &scale);
     /**
      * Scales the window by @p scale factor.
      * Performs a component wise multiplication.
      * @since 4.10
      **/
     WindowPaintData& operator*=(const QVector3D &scale);
     /**
      * Translates the window by the given @p translation and returns a reference to the ScreenPaintData.
      * @since 4.10
      **/
     WindowPaintData& operator+=(const QPointF &translation);
     /**
      * Translates the window by the given @p translation and returns a reference to the ScreenPaintData.
      * Overloaded method for convenience.
      * @since 4.10
      **/
     WindowPaintData& operator+=(const QPoint &translation);
     /**
      * Translates the window by the given @p translation and returns a reference to the ScreenPaintData.
      * Overloaded method for convenience.
      * @since 4.10
      **/
     WindowPaintData& operator+=(const QVector2D &translation);
     /**
      * Translates the window by the given @p translation and returns a reference to the ScreenPaintData.
      * Overloaded method for convenience.
      * @since 4.10
      **/
     WindowPaintData& operator+=(const QVector3D &translation);
     /**
      * Window opacity, in range 0 = transparent to 1 = fully opaque
      * @see setOpacity
      * @since 4.10
      */
     qreal opacity() const;
     /**
      * Sets the window opacity to the new @p opacity.
      * If you want to modify the existing opacity level consider using multiplyOpacity.
      * @param opacity The new opacity level
      * @since 4.10
      **/
     void setOpacity(qreal opacity);
     /**
      * Multiplies the current opacity with the @p factor.
      * @param factor Factor with which the opacity should be multiplied
      * @return New opacity level
      * @since 4.10
      **/
     qreal multiplyOpacity(qreal factor);
     /**
      * Saturation of the window, in range [0; 1]
      * 1 means that the window is unchanged, 0 means that it's completely
      *  unsaturated (greyscale). 0.5 would make the colors less intense,
      *  but not completely grey
      * Use EffectsHandler::saturationSupported() to find out whether saturation
      * is supported by the system, otherwise this value has no effect.
      * @return The current saturation
      * @see setSaturation()
      * @since 4.10
      **/
     qreal saturation() const;
     /**
      * Sets the window saturation level to @p saturation.
      * If you want to modify the existing saturation level consider using multiplySaturation.
      * @param saturation The new saturation level
      * @since 4.10
      **/
     void setSaturation(qreal saturation) const;
     /**
      * Multiplies the current saturation with @p factor.
      * @param factor with which the saturation should be multiplied
      * @return New saturation level
      * @since 4.10
      **/
     qreal multiplySaturation(qreal factor);
     /**
      * Brightness of the window, in range [0; 1]
      * 1 means that the window is unchanged, 0 means that it's completely
      * black. 0.5 would make it 50% darker than usual
      **/
     qreal brightness() const;
     /**
      * Sets the window brightness level to @p brightness.
      * If you want to modify the existing brightness level consider using multiplyBrightness.
      * @param brightness The new brightness level
      **/
     void setBrightness(qreal brightness);
     /**
      * Multiplies the current brightness level with @p factor.
      * @param factor with which the brightness should be multiplied.
      * @return New brightness level
      * @since 4.10
      **/
     qreal multiplyBrightness(qreal factor);
     /**
      * The screen number for which the painting should be done.
      * This affects color correction (different screens may need different
      * color correction lookup tables because they have different ICC profiles).
      * @return screen for which painting should be done
      */
     int screen() const;
     /**
      * @param screen New screen number
      * A value less than 0 will indicate that a default profile should be done.
      */
     void setScreen(int screen) const;
     /**
      * @brief Sets the cross fading @p factor to fade over with previously sized window.
      * If @c 1.0 only the current window is used, if @c 0.0 only the previous window is used.
      *
      * By default only the current window is used. This factor can only make any visual difference
      * if the previous window get referenced.
      *
      * @param factor The cross fade factor between @c 0.0 (previous window) and @c 1.0 (current window)
      * @see crossFadeProgress
      */
     void setCrossFadeProgress(qreal factor);
     /**
      * @see setCrossFadeProgress
      */
     qreal crossFadeProgress() const;
 
     /**
      * Sets the projection matrix that will be used when painting the window.
      *
      * The default projection matrix can be overridden by setting this matrix
      * to a non-identity matrix.
      */
     void setProjectionMatrix(const QMatrix4x4 &matrix);
 
     /**
      * Returns the current projection matrix.
      *
      * The default value for this matrix is the identity matrix.
      */
     QMatrix4x4 projectionMatrix() const;
 
     /**
      * Returns a reference to the projection matrix.
      */
     QMatrix4x4 &rprojectionMatrix();
 
     /**
      * Sets the model-view matrix that will be used when painting the window.
      *
      * The default model-view matrix can be overridden by setting this matrix
      * to a non-identity matrix.
      */
     void setModelViewMatrix(const QMatrix4x4 &matrix);
 
     /**
      * Returns the current model-view matrix.
      *
      * The default value for this matrix is the identity matrix.
      */
     QMatrix4x4 modelViewMatrix() const;
 
     /**
      * Returns a reference to the model-view matrix.
      */
     QMatrix4x4 &rmodelViewMatrix();
 
     /**
      * Returns The projection matrix as used by the current screen painting pass
      * including screen transformations.
      *
      * @since 5.6
      **/
     QMatrix4x4 screenProjectionMatrix() const;
 
     WindowQuadList quads;
 
     /**
      * Shader to be used for rendering, if any.
      */
     GLShader* shader;
 
 private:
     WindowPaintDataPrivate * const d;
 };
 
 class KWINEFFECTS_EXPORT ScreenPaintData : public PaintData
 {
 public:
     ScreenPaintData();
     ScreenPaintData(const QMatrix4x4 &projectionMatrix, const QRect &outputGeometry = QRect());
     ScreenPaintData(const ScreenPaintData &other);
     virtual ~ScreenPaintData();
     /**
      * Scales the screen by @p scale factor.
      * Multiplies all three components by the given factor.
      * @since 4.10
      **/
     ScreenPaintData& operator*=(qreal scale);
     /**
      * Scales the screen by @p scale factor.
      * Performs a component wise multiplication on x and y components.
      * @since 4.10
      **/
     ScreenPaintData& operator*=(const QVector2D &scale);
     /**
      * Scales the screen by @p scale factor.
      * Performs a component wise multiplication.
      * @since 4.10
      **/
     ScreenPaintData& operator*=(const QVector3D &scale);
     /**
      * Translates the screen by the given @p translation and returns a reference to the ScreenPaintData.
      * @since 4.10
      **/
     ScreenPaintData& operator+=(const QPointF &translation);
     /**
      * Translates the screen by the given @p translation and returns a reference to the ScreenPaintData.
      * Overloaded method for convenience.
      * @since 4.10
      **/
     ScreenPaintData& operator+=(const QPoint &translation);
     /**
      * Translates the screen by the given @p translation and returns a reference to the ScreenPaintData.
      * Overloaded method for convenience.
      * @since 4.10
      **/
     ScreenPaintData& operator+=(const QVector2D &translation);
     /**
      * Translates the screen by the given @p translation and returns a reference to the ScreenPaintData.
      * Overloaded method for convenience.
      * @since 4.10
      **/
     ScreenPaintData& operator+=(const QVector3D &translation);
     ScreenPaintData& operator=(const ScreenPaintData &rhs);
 
     /**
      * The projection matrix used by the scene for the current rendering pass.
      * On non-OpenGL compositors it's set to Identity matrix.
      * @since 5.6
      **/
     QMatrix4x4 projectionMatrix() const;
 
     /**
      * The geometry of the currently rendered output.
      * Only set for per-output rendering (e.g. Wayland).
      *
      * This geometry can be used as a hint about the native window the OpenGL context
      * is bound. OpenGL calls need to be translated to this geometry.
      * @since 5.9
      **/
     QRect outputGeometry() const;
 private:
     class Private;
     QScopedPointer<Private> d;
 };
 
 class KWINEFFECTS_EXPORT ScreenPrePaintData
 {
 public:
     int mask;
     QRegion paint;
 };
 
 /**
  * @short Helper class for restricting painting area only to allowed area.
  *
  * This helper class helps specifying areas that should be painted, clipping
  * out the rest. The simplest usage is creating an object on the stack
  * and giving it the area that is allowed to be painted to. When the object
  * is destroyed, the restriction will be removed.
  * Note that all painting code must use paintArea() to actually perform the clipping.
  */
 class KWINEFFECTS_EXPORT PaintClipper
 {
 public:
     /**
      * Calls push().
      */
     explicit PaintClipper(const QRegion& allowed_area);
     /**
      * Calls pop().
      */
     ~PaintClipper();
     /**
      * Allows painting only in the given area. When areas have been already
      * specified, painting is allowed only in the intersection of all areas.
      */
     static void push(const QRegion& allowed_area);
     /**
      * Removes the given area. It must match the top item in the stack.
      */
     static void pop(const QRegion& allowed_area);
     /**
      * Returns true if any clipping should be performed.
      */
     static bool clip();
     /**
      * If clip() returns true, this function gives the resulting area in which
      * painting is allowed. It is usually simpler to use the helper Iterator class.
      */
     static QRegion paintArea();
     /**
      * Helper class to perform the clipped painting. The usage is:
      * @code
      * for ( PaintClipper::Iterator iterator;
      *      !iterator.isDone();
      *      iterator.next())
      *     { // do the painting, possibly use iterator.boundingRect()
      *     }
      * @endcode
      */
     class KWINEFFECTS_EXPORT Iterator
     {
     public:
         Iterator();
         ~Iterator();
         bool isDone();
         void next();
         QRect boundingRect() const;
     private:
         struct Data;
         Data* data;
     };
 private:
     QRegion area;
     static QStack< QRegion >* areas;
 };
 
 /**
  * @internal
  */
 template <typename T>
 class KWINEFFECTS_EXPORT Motion
 {
 public:
     /**
      * Creates a new motion object. "Strength" is the amount of
      * acceleration that is applied to the object when the target
      * changes and "smoothness" relates to how fast the object
      * can change its direction and speed.
      */
     explicit Motion(T initial, double strength, double smoothness);
     /**
      * Creates an exact copy of another motion object, including
      * position, target and velocity.
      */
     Motion(const Motion<T> &other);
     ~Motion();
 
     inline T value() const {
         return m_value;
     }
     inline void setValue(const T value) {
         m_value = value;
     }
     inline T target() const {
         return m_target;
     }
     inline void setTarget(const T target) {
         m_start = m_value;
         m_target = target;
     }
     inline T velocity() const {
         return m_velocity;
     }
     inline void setVelocity(const T velocity) {
         m_velocity = velocity;
     }
 
     inline double strength() const {
         return m_strength;
     }
     inline void setStrength(const double strength) {
         m_strength = strength;
     }
     inline double smoothness() const {
         return m_smoothness;
     }
     inline void setSmoothness(const double smoothness) {
         m_smoothness = smoothness;
     }
     inline T startValue() {
         return m_start;
     }
 
     /**
      * The distance between the current position and the target.
      */
     inline T distance() const {
         return m_target - m_value;
     }
 
     /**
      * Calculates the new position if not at the target. Called
      * once per frame only.
      */
     void calculate(const int msec);
     /**
      * Place the object on top of the target immediately,
      * bypassing all movement calculation.
      */
     void finish();
 
 private:
     T m_value;
     T m_start;
     T m_target;
     T m_velocity;
     double m_strength;
     double m_smoothness;
 };
 
 /**
  * @short A single 1D motion dynamics object.
  *
  * This class represents a single object that can be moved around a
  * 1D space. Although it can be used directly by itself it is
  * recommended to use a motion manager instead.
  */
 class KWINEFFECTS_EXPORT Motion1D : public Motion<double>
 {
 public:
     explicit Motion1D(double initial = 0.0, double strength = 0.08, double smoothness = 4.0);
     Motion1D(const Motion1D &other);
     ~Motion1D();
 };
 
 /**
  * @short A single 2D motion dynamics object.
  *
  * This class represents a single object that can be moved around a
  * 2D space. Although it can be used directly by itself it is
  * recommended to use a motion manager instead.
  */
 class KWINEFFECTS_EXPORT Motion2D : public Motion<QPointF>
 {
 public:
     explicit Motion2D(QPointF initial = QPointF(), double strength = 0.08, double smoothness = 4.0);
     Motion2D(const Motion2D &other);
     ~Motion2D();
 };
 
 /**
  * @short Helper class for motion dynamics in KWin effects.
  *
  * This motion manager class is intended to help KWin effect authors
  * move windows across the screen smoothly and naturally. Once
  * windows are registered by the manager the effect can issue move
  * commands with the moveWindow() methods. The position of any
  * managed window can be determined in realtime by the
  * transformedGeometry() method. As the manager knows if any windows
  * are moving at any given time it can also be used as a notifier as
  * to see whether the effect is active or not.
  */
 class KWINEFFECTS_EXPORT WindowMotionManager
 {
 public:
     /**
      * Creates a new window manager object.
      */
     explicit WindowMotionManager(bool useGlobalAnimationModifier = true);
     ~WindowMotionManager();
 
     /**
      * Register a window for managing.
      */
     void manage(EffectWindow *w);
     /**
      * Register a list of windows for managing.
      */
     inline void manage(EffectWindowList list) {
         for (int i = 0; i < list.size(); i++)
             manage(list.at(i));
     }
     /**
      * Deregister a window. All transformations applied to the
      * window will be permanently removed and cannot be recovered.
      */
     void unmanage(EffectWindow *w);
     /**
      * Deregister all windows, returning the manager to its
      * originally initiated state.
      */
     void unmanageAll();
     /**
      * Determine the new positions for windows that have not
      * reached their target. Called once per frame, usually in
      * prePaintScreen(). Remember to set the
      * Effect::PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS flag.
      */
     void calculate(int time);
     /**
      * Modify a registered window's paint data to make it appear
      * at its real location on the screen. Usually called in
      * paintWindow(). Remember to flag the window as having been
      * transformed in prePaintWindow() by calling
      * WindowPrePaintData::setTransformed()
      */
     void apply(EffectWindow *w, WindowPaintData &data);
     /**
      * Set all motion targets and values back to where the
      * windows were before transformations. The same as
      * unmanaging then remanaging all windows.
      */
     void reset();
     /**
      * Resets the motion target and current value of a single
      * window.
      */
     void reset(EffectWindow *w);
 
     /**
      * Ask the manager to move the window to the target position
      * with the specified scale. If `yScale` is not provided or
      * set to 0.0, `scale` will be used as the scale in the
      * vertical direction as well as in the horizontal direction.
      */
     void moveWindow(EffectWindow *w, QPoint target, double scale = 1.0, double yScale = 0.0);
     /**
      * This is an overloaded method, provided for convenience.
      *
      * Ask the manager to move the window to the target rectangle.
      * Automatically determines scale.
      */
     inline void moveWindow(EffectWindow *w, QRect target) {
         // TODO: Scale might be slightly different in the comparison due to rounding
         moveWindow(w, target.topLeft(),
                    target.width() / double(w->width()), target.height() / double(w->height()));
     }
 
     /**
      * Retrieve the current tranformed geometry of a registered
      * window.
      */
     QRectF transformedGeometry(EffectWindow *w) const;
     /**
      * Sets the current transformed geometry of a registered window to the given geometry.
      * @see transformedGeometry
      * @since 4.5
      */
     void setTransformedGeometry(EffectWindow *w, const QRectF &geometry);
     /**
      * Retrieve the current target geometry of a registered
      * window.
      */
     QRectF targetGeometry(EffectWindow *w) const;
     /**
      * Return the window that has its transformed geometry under
      * the specified point. It is recommended to use the stacking
      * order as it's what the user sees, but it is slightly
      * slower to process.
      */
     EffectWindow* windowAtPoint(QPoint point, bool useStackingOrder = true) const;
 
     /**
      * Return a list of all currently registered windows.
      */
     inline EffectWindowList managedWindows() const {
         return m_managedWindows.keys();
     }
     /**
      * Returns whether or not a specified window is being managed
      * by this manager object.
      */
     inline bool isManaging(EffectWindow *w) const {
         return m_managedWindows.contains(w);
     }
     /**
      * Returns whether or not this manager object is actually
      * managing any windows or not.
      */
     inline bool managingWindows() const {
         return !m_managedWindows.empty();
     }
     /**
      * Returns whether all windows have reached their targets yet
      * or not. Can be used to see if an effect should be
      * processed and displayed or not.
      */
     inline bool areWindowsMoving() const {
         return !m_movingWindowsSet.isEmpty();
     }
     /**
      * Returns whether a window has reached its targets yet
      * or not.
      */
     inline bool isWindowMoving(EffectWindow *w) const {
         return m_movingWindowsSet.contains(w);
     }
 
 private:
     bool m_useGlobalAnimationModifier;
     struct WindowMotion {
         // TODO: Rotation, etc?
         Motion2D translation; // Absolute position
         Motion2D scale; // xScale and yScale
     };
     QHash<EffectWindow*, WindowMotion> m_managedWindows;
     QSet<EffectWindow*> m_movingWindowsSet;
 };
 
 /**
  * @short Helper class for displaying text and icons in frames.
  *
  * Paints text and/or and icon with an optional frame around them. The
  * available frames includes one that follows the default Plasma theme and
  * another that doesn't.
  * It is recommended to use this class whenever displaying text.
  */
 class KWINEFFECTS_EXPORT EffectFrame
 {
 public:
     EffectFrame();
     virtual ~EffectFrame();
 
     /**
      * Delete any existing textures to free up graphics memory. They will
      * be automatically recreated the next time they are required.
      */
     virtual void free() = 0;
 
     /**
      * Render the frame.
      */
     virtual void render(QRegion region = infiniteRegion(), double opacity = 1.0, double frameOpacity = 1.0) = 0;
 
     virtual void setPosition(const QPoint& point) = 0;
     /**
      * Set the text alignment for static frames and the position alignment
      * for non-static.
      */
     virtual void setAlignment(Qt::Alignment alignment) = 0;
     virtual Qt::Alignment alignment() const = 0;
     virtual void setGeometry(const QRect& geometry, bool force = false) = 0;
     virtual const QRect& geometry() const = 0;
 
     virtual void setText(const QString& text) = 0;
     virtual const QString& text() const = 0;
     virtual void setFont(const QFont& font) = 0;
     virtual const QFont& font() const = 0;
     /**
      * Set the icon that will appear on the left-hand size of the frame.
      */
     virtual void setIcon(const QIcon& icon) = 0;
     virtual const QIcon& icon() const = 0;
     virtual void setIconSize(const QSize& size) = 0;
     virtual const QSize& iconSize() const = 0;
 
     /**
      * Sets the geometry of a selection.
      * To remove the selection set a null rect.
      * @param selection The geometry of the selection in screen coordinates.
      **/
     virtual void setSelection(const QRect& selection) = 0;
 
     /**
      * @param shader The GLShader for rendering.
      **/
     virtual void setShader(GLShader* shader) = 0;
     /**
      * @returns The GLShader used for rendering or null if none.
      **/
     virtual GLShader* shader() const = 0;
 
     /**
      * @returns The style of this EffectFrame.
      **/
     virtual EffectFrameStyle style() const = 0;
 
     /**
      * If @p enable is @c true cross fading between icons and text is enabled
      * By default disabled. Use setCrossFadeProgress to cross fade.
      * Cross Fading is currently only available if OpenGL is used.
      * @param enable @c true enables cross fading, @c false disables it again
      * @see isCrossFade
      * @see setCrossFadeProgress
      * @since 4.6
      **/
     void enableCrossFade(bool enable);
     /**
      * @returns @c true if cross fading is enabled, @c false otherwise
      * @see enableCrossFade
      * @since 4.6
      **/
     bool isCrossFade() const;
     /**
      * Sets the current progress for cross fading the last used icon/text
      * with current icon/text to @p progress.
      * A value of 0.0 means completely old icon/text, a value of 1.0 means
      * completely current icon/text.
      * Default value is 1.0. You have to enable cross fade before using it.
      * Cross Fading is currently only available if OpenGL is used.
      * @see enableCrossFade
      * @see isCrossFade
      * @see crossFadeProgress
      * @since 4.6
      **/
     void setCrossFadeProgress(qreal progress);
     /**
      * @returns The current progress for cross fading
      * @see setCrossFadeProgress
      * @see enableCrossFade
      * @see isCrossFade
      * @since 4.6
      **/
     qreal crossFadeProgress() const;
 
     /**
      * Returns The projection matrix as used by the current screen painting pass
      * including screen transformations.
      *
      * This matrix is only valid during a rendering pass started by render.
      *
      * @since 5.6
      * @see render
      * @see EffectsHandler::paintEffectFrame
      * @see Effect::paintEffectFrame
      **/
     QMatrix4x4 screenProjectionMatrix() const;
 
 protected:
     void setScreenProjectionMatrix(const QMatrix4x4 &projection);
 
 private:
     EffectFramePrivate* const d;
 };
 
 /**
  * Pointer to the global EffectsHandler object.
  **/
 extern KWINEFFECTS_EXPORT EffectsHandler* effects;
 
 /***************************************************************
  WindowVertex
 ***************************************************************/
 
 inline
 WindowVertex::WindowVertex()
     : px(0), py(0), ox(0), oy(0), tx(0), ty(0)
 {
 }
 
 inline
 WindowVertex::WindowVertex(double _x, double _y, double _tx, double _ty)
     : px(_x), py(_y), ox(_x), oy(_y), tx(_tx), ty(_ty)
 {
 }
 
 inline
 void WindowVertex::move(double x, double y)
 {
     px = x;
     py = y;
 }
 
 inline
 void WindowVertex::setX(double x)
 {
     px = x;
 }
 
 inline
 void WindowVertex::setY(double y)
 {
     py = y;
 }
 
 /***************************************************************
  WindowQuad
 ***************************************************************/
 
 inline
 WindowQuad::WindowQuad(WindowQuadType t, int id)
     : quadType(t)
     , uvSwapped(false)
     , quadID(id)
 {
 }
 
 inline
 WindowVertex& WindowQuad::operator[](int index)
 {
     assert(index >= 0 && index < 4);
     return verts[ index ];
 }
 
 inline
 const WindowVertex& WindowQuad::operator[](int index) const
 {
     assert(index >= 0 && index < 4);
     return verts[ index ];
 }
 
 inline
 WindowQuadType WindowQuad::type() const
 {
     assert(quadType != WindowQuadError);
     return quadType;
 }
 
 inline
 int WindowQuad::id() const
 {
     return quadID;
 }
 
 inline
 bool WindowQuad::decoration() const
 {
     assert(quadType != WindowQuadError);
     return quadType == WindowQuadDecoration;
 }
 
 inline
 bool WindowQuad::effect() const
 {
     assert(quadType != WindowQuadError);
     return quadType >= EFFECT_QUAD_TYPE_START;
 }
 
 inline
 bool WindowQuad::isTransformed() const
 {
     return !(verts[ 0 ].px == verts[ 0 ].ox && verts[ 0 ].py == verts[ 0 ].oy
              && verts[ 1 ].px == verts[ 1 ].ox && verts[ 1 ].py == verts[ 1 ].oy
              && verts[ 2 ].px == verts[ 2 ].ox && verts[ 2 ].py == verts[ 2 ].oy
              && verts[ 3 ].px == verts[ 3 ].ox && verts[ 3 ].py == verts[ 3 ].oy);
 }
 
 inline
 double WindowQuad::left() const
 {
     return qMin(verts[ 0 ].px, qMin(verts[ 1 ].px, qMin(verts[ 2 ].px, verts[ 3 ].px)));
 }
 
 inline
 double WindowQuad::right() const
 {
     return qMax(verts[ 0 ].px, qMax(verts[ 1 ].px, qMax(verts[ 2 ].px, verts[ 3 ].px)));
 }
 
 inline
 double WindowQuad::top() const
 {
     return qMin(verts[ 0 ].py, qMin(verts[ 1 ].py, qMin(verts[ 2 ].py, verts[ 3 ].py)));
 }
 
 inline
 double WindowQuad::bottom() const
 {
     return qMax(verts[ 0 ].py, qMax(verts[ 1 ].py, qMax(verts[ 2 ].py, verts[ 3 ].py)));
 }
 
 inline
 double WindowQuad::originalLeft() const
 {
     return verts[ 0 ].ox;
 }
 
 inline
 double WindowQuad::originalRight() const
 {
     return verts[ 2 ].ox;
 }
 
 inline
 double WindowQuad::originalTop() const
 {
     return verts[ 0 ].oy;
 }
 
 inline
 double WindowQuad::originalBottom() const
 {
     return verts[ 2 ].oy;
 }
 
 /***************************************************************
  Motion
 ***************************************************************/
 
 template <typename T>
 Motion<T>::Motion(T initial, double strength, double smoothness)
     :   m_value(initial)
     ,   m_start(initial)
     ,   m_target(initial)
     ,   m_velocity()
     ,   m_strength(strength)
     ,   m_smoothness(smoothness)
 {
 }
 
 template <typename T>
 Motion<T>::Motion(const Motion &other)
     :   m_value(other.value())
     ,   m_start(other.target())
     ,   m_target(other.target())
     ,   m_velocity(other.velocity())
     ,   m_strength(other.strength())
     ,   m_smoothness(other.smoothness())
 {
 }
 
 template <typename T>
 Motion<T>::~Motion()
 {
 }
 
 template <typename T>
 void Motion<T>::calculate(const int msec)
 {
     if (m_value == m_target && m_velocity == T())   // At target and not moving
         return;
 
     // Poor man's time independent calculation
     int steps = qMax(1, msec / 5);
     for (int i = 0; i < steps; i++) {
         T diff = m_target - m_value;
         T strength = diff * m_strength;
         m_velocity = (m_smoothness * m_velocity + strength) / (m_smoothness + 1.0);
         m_value += m_velocity;
     }
 }
 
 template <typename T>
 void Motion<T>::finish()
 {
     m_value = m_target;
     m_velocity = T();
 }
 
 /***************************************************************
  Effect
 ***************************************************************/
 template <typename T>
 int Effect::animationTime(int defaultDuration)
 {
     return animationTime(T::duration() != 0 ? T::duration() : defaultDuration);
 }
 
 } // namespace
 Q_DECLARE_METATYPE(KWin::EffectWindow*)
 Q_DECLARE_METATYPE(QList<KWin::EffectWindow*>)
 
 /** @} */
 
 #endif // KWINEFFECTS_H