File indexing completed on 2024-05-19 16:34:55

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 1999, 2000 Matthias Ettrich <ettrich@kde.org>
     SPDX-FileCopyrightText: 2003 Lubos Lunak <l.lunak@kde.org>
     SPDX-FileCopyrightText: 2009 Martin Gräßlin <mgraesslin@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 //#define QT_CLEAN_NAMESPACE
 // own
 #include "tabbox.h"
 // tabbox
 #include "tabbox/clientmodel.h"
 #include "tabbox/desktopchain.h"
 #include "tabbox/desktopmodel.h"
 #include "tabbox/tabbox_logging.h"
 #include "tabbox/tabboxconfig.h"
 #include "tabbox/x11_filter.h"
 // kwin
 #if KWIN_BUILD_ACTIVITIES
 #include "activities.h"
 #endif
 #include "composite.h"
 #include "effects.h"
 #include "focuschain.h"
 #include "input.h"
 #include "keyboard_input.h"
 #include "pointer_input.h"
 #include "screenedge.h"
 #include "unmanaged.h"
 #include "utils/xcbutils.h"
 #include "virtualdesktops.h"
 #include "workspace.h"
 #include "x11window.h"
 // Qt
 #include <QAction>
 #include <QKeyEvent>
 // KDE
 #include <KConfig>
 #include <KConfigGroup>
 #include <KGlobalAccel>
 #include <KLazyLocalizedString>
 #include <KLocalizedString>
 #include <kkeyserver.h>
 // X11
 #include <X11/keysym.h>
 #include <X11/keysymdef.h>
 // xcb
 #include <xcb/xcb_keysyms.h>
 
 // specify externals before namespace
 
 namespace KWin
 {
 
 namespace TabBox
 {
 
 TabBoxHandlerImpl::TabBoxHandlerImpl(TabBox *tabBox)
     : TabBoxHandler(tabBox)
     , m_tabBox(tabBox)
     , m_desktopFocusChain(new DesktopChainManager(this))
 {
     // connects for DesktopFocusChainManager
     VirtualDesktopManager *vds = VirtualDesktopManager::self();
     connect(vds, &VirtualDesktopManager::countChanged, m_desktopFocusChain, &DesktopChainManager::resize);
     connect(vds, &VirtualDesktopManager::currentChanged, m_desktopFocusChain, &DesktopChainManager::addDesktop);
 #if KWIN_BUILD_ACTIVITIES
     if (Workspace::self()->activities()) {
         connect(Workspace::self()->activities(), &Activities::currentChanged, m_desktopFocusChain, &DesktopChainManager::useChain);
     }
 #endif
 }
 
 TabBoxHandlerImpl::~TabBoxHandlerImpl()
 {
 }
 
 int TabBoxHandlerImpl::activeScreen() const
 {
     return workspace()->outputs().indexOf(workspace()->activeOutput());
 }
 
 int TabBoxHandlerImpl::currentDesktop() const
 {
     return VirtualDesktopManager::self()->current();
 }
 
 QString TabBoxHandlerImpl::desktopName(TabBoxClient *client) const
 {
     if (TabBoxClientImpl *c = static_cast<TabBoxClientImpl *>(client)) {
         if (!c->client()->isOnAllDesktops()) {
             return desktopName(c->client()->desktop());
         }
     }
     return desktopName(VirtualDesktopManager::self()->current());
 }
 
 QString TabBoxHandlerImpl::desktopName(int desktop) const
 {
     const VirtualDesktop *vd = VirtualDesktopManager::self()->desktopForX11Id(desktop);
     return vd ? vd->name() : QString();
 }
 
 QWeakPointer<TabBoxClient> TabBoxHandlerImpl::nextClientFocusChain(TabBoxClient *client) const
 {
     if (TabBoxClientImpl *c = static_cast<TabBoxClientImpl *>(client)) {
         auto next = Workspace::self()->focusChain()->nextMostRecentlyUsed(c->client());
         if (next) {
             return qWeakPointerCast<TabBoxClient, TabBoxClientImpl>(next->tabBoxClient());
         }
     }
     return QWeakPointer<TabBoxClient>();
 }
 
 QWeakPointer<TabBoxClient> TabBoxHandlerImpl::firstClientFocusChain() const
 {
     if (auto c = Workspace::self()->focusChain()->firstMostRecentlyUsed()) {
         return qWeakPointerCast<TabBoxClient, TabBoxClientImpl>(c->tabBoxClient());
     } else {
         return QWeakPointer<TabBoxClient>();
     }
 }
 
 bool TabBoxHandlerImpl::isInFocusChain(TabBoxClient *client) const
 {
     if (TabBoxClientImpl *c = static_cast<TabBoxClientImpl *>(client)) {
         return Workspace::self()->focusChain()->contains(c->client());
     }
     return false;
 }
 
 int TabBoxHandlerImpl::nextDesktopFocusChain(int desktop) const
 {
     return m_desktopFocusChain->next(desktop);
 }
 
 int TabBoxHandlerImpl::numberOfDesktops() const
 {
     return VirtualDesktopManager::self()->count();
 }
 
 QWeakPointer<TabBoxClient> TabBoxHandlerImpl::activeClient() const
 {
     if (Workspace::self()->activeWindow()) {
         return qWeakPointerCast<TabBoxClient, TabBoxClientImpl>(Workspace::self()->activeWindow()->tabBoxClient());
     } else {
         return QWeakPointer<TabBoxClient>();
     }
 }
 
 bool TabBoxHandlerImpl::checkDesktop(TabBoxClient *client, int desktop) const
 {
     auto current = (static_cast<TabBoxClientImpl *>(client))->client();
 
     switch (config().clientDesktopMode()) {
     case TabBoxConfig::AllDesktopsClients:
         return true;
     case TabBoxConfig::ExcludeCurrentDesktopClients:
         return !current->isOnDesktop(desktop);
     default: // TabBoxConfig::OnlyCurrentDesktopClients
         return current->isOnDesktop(desktop);
     }
 }
 
 bool TabBoxHandlerImpl::checkActivity(TabBoxClient *client) const
 {
     auto current = (static_cast<TabBoxClientImpl *>(client))->client();
 
     switch (config().clientActivitiesMode()) {
     case TabBoxConfig::AllActivitiesClients:
         return true;
     case TabBoxConfig::ExcludeCurrentActivityClients:
         return !current->isOnCurrentActivity();
     default: // TabBoxConfig::OnlyCurrentActivityClients
         return current->isOnCurrentActivity();
     }
 }
 
 bool TabBoxHandlerImpl::checkApplications(TabBoxClient *client) const
 {
     auto current = (static_cast<TabBoxClientImpl *>(client))->client();
     TabBoxClientImpl *c;
     QListIterator<QWeakPointer<TabBoxClient>> i(clientList());
 
     switch (config().clientApplicationsMode()) {
     case TabBoxConfig::OneWindowPerApplication:
         // check if the list already contains an entry of this application
         while (i.hasNext()) {
             QSharedPointer<TabBoxClient> client = i.next().toStrongRef();
             if (!client) {
                 continue;
             }
             if ((c = dynamic_cast<TabBoxClientImpl *>(client.data()))) {
                 if (Window::belongToSameApplication(c->client(), current, Window::SameApplicationCheck::AllowCrossProcesses)) {
                     return false;
                 }
             }
         }
         return true;
     case TabBoxConfig::AllWindowsCurrentApplication: {
         QSharedPointer<TabBoxClient> pointer = tabBox->activeClient().toStrongRef();
         if (!pointer) {
             return false;
         }
         if ((c = dynamic_cast<TabBoxClientImpl *>(pointer.data()))) {
             if (Window::belongToSameApplication(c->client(), current, Window::SameApplicationCheck::AllowCrossProcesses)) {
                 return true;
             }
         }
         return false;
     }
     default: // TabBoxConfig::AllWindowsAllApplications
         return true;
     }
 }
 
 bool TabBoxHandlerImpl::checkMinimized(TabBoxClient *client) const
 {
     switch (config().clientMinimizedMode()) {
     case TabBoxConfig::ExcludeMinimizedClients:
         return !client->isMinimized();
     case TabBoxConfig::OnlyMinimizedClients:
         return client->isMinimized();
     default: // TabBoxConfig::IgnoreMinimizedStatus
         return true;
     }
 }
 
 bool TabBoxHandlerImpl::checkMultiScreen(TabBoxClient *client) const
 {
     auto current = (static_cast<TabBoxClientImpl *>(client))->client();
 
     switch (config().clientMultiScreenMode()) {
     case TabBoxConfig::IgnoreMultiScreen:
         return true;
     case TabBoxConfig::ExcludeCurrentScreenClients:
         return current->output() != workspace()->activeOutput();
     default: // TabBoxConfig::OnlyCurrentScreenClients
         return current->output() == workspace()->activeOutput();
     }
 }
 
 QWeakPointer<TabBoxClient> TabBoxHandlerImpl::clientToAddToList(TabBoxClient *client, int desktop) const
 {
     if (!client) {
         return QWeakPointer<TabBoxClient>();
     }
     Window *ret = nullptr;
     Window *current = (static_cast<TabBoxClientImpl *>(client))->client();
 
     bool addClient = checkDesktop(client, desktop)
         && checkActivity(client)
         && checkApplications(client)
         && checkMinimized(client)
         && checkMultiScreen(client);
     addClient = addClient && current->wantsTabFocus() && !current->skipSwitcher();
     if (addClient) {
         // don't add windows that have modal dialogs
         Window *modal = current->findModal();
         if (modal == nullptr || modal == current) {
             ret = current;
         } else if (!clientList().contains(qWeakPointerCast<TabBoxClient, TabBoxClientImpl>(modal->tabBoxClient()))) {
             ret = modal;
         } else {
             // nothing
         }
     }
     if (ret) {
         return qWeakPointerCast<TabBoxClient, TabBoxClientImpl>(ret->tabBoxClient());
     } else {
         return QWeakPointer<TabBoxClient>();
     }
 }
 
 TabBoxClientList TabBoxHandlerImpl::stackingOrder() const
 {
     const QList<Window *> stacking = Workspace::self()->stackingOrder();
     TabBoxClientList ret;
     for (Window *window : stacking) {
         if (window->isClient()) {
             ret.append(qWeakPointerCast<TabBoxClient, TabBoxClientImpl>(window->tabBoxClient()));
         }
     }
     return ret;
 }
 
 bool TabBoxHandlerImpl::isKWinCompositing() const
 {
     return Compositor::compositing();
 }
 
 void TabBoxHandlerImpl::raiseClient(TabBoxClient *c) const
 {
     Workspace::self()->raiseWindow(static_cast<TabBoxClientImpl *>(c)->client());
 }
 
 void TabBoxHandlerImpl::restack(TabBoxClient *c, TabBoxClient *under)
 {
     Workspace::self()->restack(static_cast<TabBoxClientImpl *>(c)->client(),
                                static_cast<TabBoxClientImpl *>(under)->client(), true);
 }
 
 void TabBoxHandlerImpl::elevateClient(TabBoxClient *c, QWindow *tabbox, bool b) const
 {
     auto cl = static_cast<TabBoxClientImpl *>(c)->client();
     cl->elevate(b);
     if (Window *w = Workspace::self()->findInternal(tabbox)) {
         w->elevate(b);
     }
 }
 
 void TabBoxHandlerImpl::shadeClient(TabBoxClient *c, bool b) const
 {
     Window *client = static_cast<TabBoxClientImpl *>(c)->client();
     client->cancelShadeHoverTimer(); // stop core shading action
     if (!b && client->shadeMode() == ShadeNormal) {
         client->setShade(ShadeHover);
     } else if (b && client->shadeMode() == ShadeHover) {
         client->setShade(ShadeNormal);
     }
 }
 
 QWeakPointer<TabBoxClient> TabBoxHandlerImpl::desktopClient() const
 {
     const auto stackingOrder = Workspace::self()->stackingOrder();
     for (Window *window : stackingOrder) {
         if (window->isClient() && window->isDesktop() && window->isOnCurrentDesktop() && window->output() == workspace()->activeOutput()) {
             return qWeakPointerCast<TabBoxClient, TabBoxClientImpl>(window->tabBoxClient());
         }
     }
     return QWeakPointer<TabBoxClient>();
 }
 
 void TabBoxHandlerImpl::activateAndClose()
 {
     m_tabBox->accept();
 }
 
 void TabBoxHandlerImpl::highlightWindows(TabBoxClient *window, QWindow *controller)
 {
     if (!effects) {
         return;
     }
     QVector<EffectWindow *> windows;
     if (window) {
         windows << static_cast<TabBoxClientImpl *>(window)->client()->effectWindow();
     }
     if (Window *t = workspace()->findInternal(controller)) {
         windows << t->effectWindow();
     }
     static_cast<EffectsHandlerImpl *>(effects)->highlightWindows(windows);
 }
 
 bool TabBoxHandlerImpl::noModifierGrab() const
 {
     return m_tabBox->noModifierGrab();
 }
 
 /*********************************************************
  * TabBoxClientImpl
  *********************************************************/
 
 TabBoxClientImpl::TabBoxClientImpl(Window *client)
     : TabBoxClient()
     , m_client(client)
 {
 }
 
 TabBoxClientImpl::~TabBoxClientImpl()
 {
 }
 
 QString TabBoxClientImpl::caption() const
 {
     if (m_client->isDesktop()) {
         return i18nc("Special entry in alt+tab list for minimizing all windows",
                      "Show Desktop");
     }
     return m_client->caption();
 }
 
 QIcon TabBoxClientImpl::icon() const
 {
     if (m_client->isDesktop()) {
         return QIcon::fromTheme(QStringLiteral("user-desktop"));
     }
     return m_client->icon();
 }
 
 bool TabBoxClientImpl::isMinimized() const
 {
     return m_client->isMinimized();
 }
 
 int TabBoxClientImpl::x() const
 {
     return m_client->x();
 }
 
 int TabBoxClientImpl::y() const
 {
     return m_client->y();
 }
 
 int TabBoxClientImpl::width() const
 {
     return m_client->width();
 }
 
 int TabBoxClientImpl::height() const
 {
     return m_client->height();
 }
 
 bool TabBoxClientImpl::isCloseable() const
 {
     return m_client->isCloseable();
 }
 
 void TabBoxClientImpl::close()
 {
     m_client->closeWindow();
 }
 
 bool TabBoxClientImpl::isFirstInTabBox() const
 {
     return m_client->isFirstInTabBox();
 }
 
 QUuid TabBoxClientImpl::internalId() const
 {
     return m_client->internalId();
 }
 
 /*********************************************************
  * TabBox
  *********************************************************/
 
 TabBox::TabBox()
     : m_displayRefcount(0)
     , m_desktopGrab(false)
     , m_tabGrab(false)
     , m_noModifierGrab(false)
     , m_forcedGlobalMouseGrab(false)
     , m_ready(false)
 {
     m_isShown = false;
     m_defaultConfig = TabBoxConfig();
     m_defaultConfig.setTabBoxMode(TabBoxConfig::ClientTabBox);
     m_defaultConfig.setClientDesktopMode(TabBoxConfig::OnlyCurrentDesktopClients);
     m_defaultConfig.setClientActivitiesMode(TabBoxConfig::OnlyCurrentActivityClients);
     m_defaultConfig.setClientApplicationsMode(TabBoxConfig::AllWindowsAllApplications);
     m_defaultConfig.setOrderMinimizedMode(TabBoxConfig::NoGroupByMinimized);
     m_defaultConfig.setClientMinimizedMode(TabBoxConfig::IgnoreMinimizedStatus);
     m_defaultConfig.setShowDesktopMode(TabBoxConfig::DoNotShowDesktopClient);
     m_defaultConfig.setClientMultiScreenMode(TabBoxConfig::IgnoreMultiScreen);
     m_defaultConfig.setClientSwitchingMode(TabBoxConfig::FocusChainSwitching);
 
     m_alternativeConfig = TabBoxConfig();
     m_alternativeConfig.setTabBoxMode(TabBoxConfig::ClientTabBox);
     m_alternativeConfig.setClientDesktopMode(TabBoxConfig::AllDesktopsClients);
     m_alternativeConfig.setClientActivitiesMode(TabBoxConfig::OnlyCurrentActivityClients);
     m_alternativeConfig.setClientApplicationsMode(TabBoxConfig::AllWindowsAllApplications);
     m_alternativeConfig.setOrderMinimizedMode(TabBoxConfig::NoGroupByMinimized);
     m_alternativeConfig.setClientMinimizedMode(TabBoxConfig::IgnoreMinimizedStatus);
     m_alternativeConfig.setShowDesktopMode(TabBoxConfig::DoNotShowDesktopClient);
     m_alternativeConfig.setClientMultiScreenMode(TabBoxConfig::IgnoreMultiScreen);
     m_alternativeConfig.setClientSwitchingMode(TabBoxConfig::FocusChainSwitching);
 
     m_defaultCurrentApplicationConfig = m_defaultConfig;
     m_defaultCurrentApplicationConfig.setClientApplicationsMode(TabBoxConfig::AllWindowsCurrentApplication);
 
     m_alternativeCurrentApplicationConfig = m_alternativeConfig;
     m_alternativeCurrentApplicationConfig.setClientApplicationsMode(TabBoxConfig::AllWindowsCurrentApplication);
 
     m_desktopConfig = TabBoxConfig();
     m_desktopConfig.setTabBoxMode(TabBoxConfig::DesktopTabBox);
     m_desktopConfig.setShowTabBox(true);
     m_desktopConfig.setShowDesktopMode(TabBoxConfig::DoNotShowDesktopClient);
     m_desktopConfig.setDesktopSwitchingMode(TabBoxConfig::MostRecentlyUsedDesktopSwitching);
 
     m_desktopListConfig = TabBoxConfig();
     m_desktopListConfig.setTabBoxMode(TabBoxConfig::DesktopTabBox);
     m_desktopListConfig.setShowTabBox(true);
     m_desktopListConfig.setShowDesktopMode(TabBoxConfig::DoNotShowDesktopClient);
     m_desktopListConfig.setDesktopSwitchingMode(TabBoxConfig::StaticDesktopSwitching);
     m_tabBox = new TabBoxHandlerImpl(this);
     QTimer::singleShot(0, this, &TabBox::handlerReady);
 
     m_tabBoxMode = TabBoxDesktopMode; // init variables
     connect(&m_delayedShowTimer, &QTimer::timeout, this, &TabBox::show);
     connect(Workspace::self(), &Workspace::configChanged, this, &TabBox::reconfigure);
 }
 
 TabBox::~TabBox() = default;
 
 void TabBox::handlerReady()
 {
     m_tabBox->setConfig(m_defaultConfig);
     reconfigure();
     m_ready = true;
 }
 
 template<typename Slot>
 void TabBox::key(const KLazyLocalizedString &actionName, Slot slot, const QKeySequence &shortcut)
 {
     QAction *a = new QAction(this);
     a->setProperty("componentName", QStringLiteral("kwin"));
     a->setObjectName(QString::fromUtf8(actionName.untranslatedText()));
     a->setText(actionName.toString());
     KGlobalAccel::self()->setGlobalShortcut(a, QList<QKeySequence>() << shortcut);
     connect(a, &QAction::triggered, this, slot);
     auto cuts = KGlobalAccel::self()->shortcut(a);
     globalShortcutChanged(a, cuts.isEmpty() ? QKeySequence() : cuts.first());
 }
 
 static constexpr const auto s_windows = kli18n("Walk Through Windows");
 static constexpr const auto s_windowsRev = kli18n("Walk Through Windows (Reverse)");
 static constexpr const auto s_windowsAlt = kli18n("Walk Through Windows Alternative");
 static constexpr const auto s_windowsAltRev = kli18n("Walk Through Windows Alternative (Reverse)");
 static constexpr const auto s_app = kli18n("Walk Through Windows of Current Application");
 static constexpr const auto s_appRev = kli18n("Walk Through Windows of Current Application (Reverse)");
 static constexpr const auto s_appAlt = kli18n("Walk Through Windows of Current Application Alternative");
 static constexpr const auto s_appAltRev = kli18n("Walk Through Windows of Current Application Alternative (Reverse)");
 static constexpr const auto s_desktops = kli18n("Walk Through Desktops");
 static constexpr const auto s_desktopsRev = kli18n("Walk Through Desktops (Reverse)");
 static constexpr const auto s_desktopList = kli18n("Walk Through Desktop List");
 static constexpr const auto s_desktopListRev = kli18n("Walk Through Desktop List (Reverse)");
 
 void TabBox::initShortcuts()
 {
     key(s_windows, &TabBox::slotWalkThroughWindows, Qt::ALT | Qt::Key_Tab);
     key(s_windowsRev, &TabBox::slotWalkBackThroughWindows, Qt::ALT | Qt::SHIFT | Qt::Key_Backtab);
     key(s_app, &TabBox::slotWalkThroughCurrentAppWindows, Qt::ALT | Qt::Key_QuoteLeft);
     key(s_appRev, &TabBox::slotWalkBackThroughCurrentAppWindows, Qt::ALT | Qt::Key_AsciiTilde);
     key(s_windowsAlt, &TabBox::slotWalkThroughWindowsAlternative);
     key(s_windowsAltRev, &TabBox::slotWalkBackThroughWindowsAlternative);
     key(s_appAlt, &TabBox::slotWalkThroughCurrentAppWindowsAlternative);
     key(s_appAltRev, &TabBox::slotWalkBackThroughCurrentAppWindowsAlternative);
     key(s_desktops, &TabBox::slotWalkThroughDesktops);
     key(s_desktopsRev, &TabBox::slotWalkBackThroughDesktops);
     key(s_desktopList, &TabBox::slotWalkThroughDesktopList);
     key(s_desktopListRev, &TabBox::slotWalkBackThroughDesktopList);
 
     connect(KGlobalAccel::self(), &KGlobalAccel::globalShortcutChanged, this, &TabBox::globalShortcutChanged);
 }
 
 void TabBox::globalShortcutChanged(QAction *action, const QKeySequence &seq)
 {
     if (qstrcmp(qPrintable(action->objectName()), s_windows.untranslatedText()) == 0) {
         m_cutWalkThroughWindows = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_windowsRev.untranslatedText()) == 0) {
         m_cutWalkThroughWindowsReverse = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_app.untranslatedText()) == 0) {
         m_cutWalkThroughCurrentAppWindows = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_appRev.untranslatedText()) == 0) {
         m_cutWalkThroughCurrentAppWindowsReverse = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_windowsAlt.untranslatedText()) == 0) {
         m_cutWalkThroughWindowsAlternative = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_windowsAltRev.untranslatedText()) == 0) {
         m_cutWalkThroughWindowsAlternativeReverse = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_appAlt.untranslatedText()) == 0) {
         m_cutWalkThroughCurrentAppWindowsAlternative = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_appAltRev.untranslatedText()) == 0) {
         m_cutWalkThroughCurrentAppWindowsAlternativeReverse = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_desktops.untranslatedText()) == 0) {
         m_cutWalkThroughDesktops = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_desktopsRev.untranslatedText()) == 0) {
         m_cutWalkThroughDesktopsReverse = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_desktopList.untranslatedText()) == 0) {
         m_cutWalkThroughDesktopList = seq;
     } else if (qstrcmp(qPrintable(action->objectName()), s_desktopListRev.untranslatedText()) == 0) {
         m_cutWalkThroughDesktopListReverse = seq;
     }
 }
 
 void TabBox::setMode(TabBoxMode mode)
 {
     m_tabBoxMode = mode;
     switch (mode) {
     case TabBoxWindowsMode:
         m_tabBox->setConfig(m_defaultConfig);
         break;
     case TabBoxWindowsAlternativeMode:
         m_tabBox->setConfig(m_alternativeConfig);
         break;
     case TabBoxCurrentAppWindowsMode:
         m_tabBox->setConfig(m_defaultCurrentApplicationConfig);
         break;
     case TabBoxCurrentAppWindowsAlternativeMode:
         m_tabBox->setConfig(m_alternativeCurrentApplicationConfig);
         break;
     case TabBoxDesktopMode:
         m_tabBox->setConfig(m_desktopConfig);
         break;
     case TabBoxDesktopListMode:
         m_tabBox->setConfig(m_desktopListConfig);
         break;
     }
 }
 
 void TabBox::reset(bool partial_reset)
 {
     switch (m_tabBox->config().tabBoxMode()) {
     case TabBoxConfig::ClientTabBox:
         m_tabBox->createModel(partial_reset);
         if (!partial_reset) {
             if (Workspace::self()->activeWindow()) {
                 setCurrentClient(Workspace::self()->activeWindow());
             }
             // it's possible that the active client is not part of the model
             // in that case the index is invalid
             if (!m_tabBox->currentIndex().isValid()) {
                 setCurrentIndex(m_tabBox->first());
             }
         } else {
             if (!m_tabBox->currentIndex().isValid() || !m_tabBox->client(m_tabBox->currentIndex())) {
                 setCurrentIndex(m_tabBox->first());
             }
         }
         break;
     case TabBoxConfig::DesktopTabBox:
         m_tabBox->createModel();
 
         if (!partial_reset) {
             setCurrentDesktop(VirtualDesktopManager::self()->current());
         }
         break;
     }
 
     Q_EMIT tabBoxUpdated();
 }
 
 void TabBox::nextPrev(bool next)
 {
     setCurrentIndex(m_tabBox->nextPrev(next), false);
     Q_EMIT tabBoxUpdated();
 }
 
 Window *TabBox::currentClient()
 {
     if (TabBoxClientImpl *client = static_cast<TabBoxClientImpl *>(m_tabBox->client(m_tabBox->currentIndex()))) {
         if (!Workspace::self()->hasWindow(client->client())) {
             return nullptr;
         }
         return client->client();
     } else {
         return nullptr;
     }
 }
 
 QList<Window *> TabBox::currentClientList()
 {
     const TabBoxClientList list = m_tabBox->clientList();
     QList<Window *> ret;
     for (const QWeakPointer<TabBoxClient> &clientPointer : list) {
         QSharedPointer<TabBoxClient> client = clientPointer.toStrongRef();
         if (!client) {
             continue;
         }
         if (const TabBoxClientImpl *c = static_cast<const TabBoxClientImpl *>(client.data())) {
             ret.append(c->client());
         }
     }
     return ret;
 }
 
 int TabBox::currentDesktop()
 {
     return m_tabBox->desktop(m_tabBox->currentIndex());
 }
 
 QList<int> TabBox::currentDesktopList()
 {
     return m_tabBox->desktopList();
 }
 
 void TabBox::setCurrentClient(Window *newClient)
 {
     setCurrentIndex(m_tabBox->index(qWeakPointerCast<TabBoxClient, TabBoxClientImpl>(newClient->tabBoxClient())));
 }
 
 void TabBox::setCurrentDesktop(int newDesktop)
 {
     setCurrentIndex(m_tabBox->desktopIndex(newDesktop));
 }
 
 void TabBox::setCurrentIndex(QModelIndex index, bool notifyEffects)
 {
     if (!index.isValid()) {
         return;
     }
     m_tabBox->setCurrentIndex(index);
     if (notifyEffects) {
         Q_EMIT tabBoxUpdated();
     }
 }
 
 void TabBox::show()
 {
     Q_EMIT tabBoxAdded(m_tabBoxMode);
     if (isDisplayed()) {
         m_isShown = false;
         return;
     }
     workspace()->setShowingDesktop(false);
     reference();
     m_isShown = true;
     m_tabBox->show();
 }
 
 void TabBox::hide(bool abort)
 {
     m_delayedShowTimer.stop();
     if (m_isShown) {
         m_isShown = false;
         unreference();
     }
     Q_EMIT tabBoxClosed();
     if (isDisplayed()) {
         qCDebug(KWIN_TABBOX) << "Tab box was not properly closed by an effect";
     }
     m_tabBox->hide(abort);
 }
 
 void TabBox::reconfigure()
 {
     KSharedConfigPtr c = kwinApp()->config();
     KConfigGroup config = c->group("TabBox");
 
     loadConfig(c->group("TabBox"), m_defaultConfig);
     loadConfig(c->group("TabBoxAlternative"), m_alternativeConfig);
 
     m_defaultCurrentApplicationConfig = m_defaultConfig;
     m_defaultCurrentApplicationConfig.setClientApplicationsMode(TabBoxConfig::AllWindowsCurrentApplication);
     m_alternativeCurrentApplicationConfig = m_alternativeConfig;
     m_alternativeCurrentApplicationConfig.setClientApplicationsMode(TabBoxConfig::AllWindowsCurrentApplication);
 
     m_tabBox->setConfig(m_defaultConfig);
 
     m_delayShowTime = config.readEntry<int>("DelayTime", 90);
 
     const QString defaultDesktopLayout = QStringLiteral("org.kde.breeze.desktop");
     m_desktopConfig.setLayoutName(config.readEntry("DesktopLayout", defaultDesktopLayout));
     m_desktopListConfig.setLayoutName(config.readEntry("DesktopListLayout", defaultDesktopLayout));
 
     QList<ElectricBorder> *borders = &m_borderActivate;
     QString borderConfig = QStringLiteral("BorderActivate");
     for (int i = 0; i < 2; ++i) {
         for (ElectricBorder border : std::as_const(*borders)) {
             workspace()->screenEdges()->unreserve(border, this);
         }
         borders->clear();
         QStringList list = config.readEntry(borderConfig, QStringList());
         for (const QString &s : std::as_const(list)) {
             bool ok;
             const int i = s.toInt(&ok);
             if (!ok) {
                 continue;
             }
             borders->append(ElectricBorder(i));
             workspace()->screenEdges()->reserve(ElectricBorder(i), this, "toggle");
         }
         borders = &m_borderAlternativeActivate;
         borderConfig = QStringLiteral("BorderAlternativeActivate");
     }
 
     auto touchConfig = [this, config](const QString &key, QHash<ElectricBorder, QAction *> &actions, TabBoxMode mode, const QStringList &defaults = QStringList{}) {
         // fist erase old config
         for (auto it = actions.begin(); it != actions.end();) {
             delete it.value();
             it = actions.erase(it);
         }
         // now new config
         const QStringList list = config.readEntry(key, defaults);
         for (const auto &s : list) {
             bool ok;
             const int i = s.toInt(&ok);
             if (!ok) {
                 continue;
             }
             QAction *a = new QAction(this);
             connect(a, &QAction::triggered, this, std::bind(&TabBox::toggleMode, this, mode));
             workspace()->screenEdges()->reserveTouch(ElectricBorder(i), a);
             actions.insert(ElectricBorder(i), a);
         }
     };
     touchConfig(QStringLiteral("TouchBorderActivate"), m_touchActivate, TabBoxWindowsMode);
     touchConfig(QStringLiteral("TouchBorderAlternativeActivate"), m_touchAlternativeActivate, TabBoxWindowsAlternativeMode);
 }
 
 void TabBox::loadConfig(const KConfigGroup &config, TabBoxConfig &tabBoxConfig)
 {
     tabBoxConfig.setClientDesktopMode(TabBoxConfig::ClientDesktopMode(
         config.readEntry<int>("DesktopMode", TabBoxConfig::defaultDesktopMode())));
     tabBoxConfig.setClientActivitiesMode(TabBoxConfig::ClientActivitiesMode(
         config.readEntry<int>("ActivitiesMode", TabBoxConfig::defaultActivitiesMode())));
     tabBoxConfig.setClientApplicationsMode(TabBoxConfig::ClientApplicationsMode(
         config.readEntry<int>("ApplicationsMode", TabBoxConfig::defaultApplicationsMode())));
     tabBoxConfig.setOrderMinimizedMode(TabBoxConfig::OrderMinimizedMode(
         config.readEntry<int>("OrderMinimizedMode", TabBoxConfig::defaultOrderMinimizedMode())));
     tabBoxConfig.setClientMinimizedMode(TabBoxConfig::ClientMinimizedMode(
         config.readEntry<int>("MinimizedMode", TabBoxConfig::defaultMinimizedMode())));
     tabBoxConfig.setShowDesktopMode(TabBoxConfig::ShowDesktopMode(
         config.readEntry<int>("ShowDesktopMode", TabBoxConfig::defaultShowDesktopMode())));
     tabBoxConfig.setClientMultiScreenMode(TabBoxConfig::ClientMultiScreenMode(
         config.readEntry<int>("MultiScreenMode", TabBoxConfig::defaultMultiScreenMode())));
     tabBoxConfig.setClientSwitchingMode(TabBoxConfig::ClientSwitchingMode(
         config.readEntry<int>("SwitchingMode", TabBoxConfig::defaultSwitchingMode())));
 
     tabBoxConfig.setShowTabBox(config.readEntry<bool>("ShowTabBox",
                                                       TabBoxConfig::defaultShowTabBox()));
     tabBoxConfig.setHighlightWindows(config.readEntry<bool>("HighlightWindows",
                                                             TabBoxConfig::defaultHighlightWindow()));
 
     tabBoxConfig.setLayoutName(config.readEntry<QString>("LayoutName", TabBoxConfig::defaultLayoutName()));
 }
 
 void TabBox::delayedShow()
 {
     if (isDisplayed() || m_delayedShowTimer.isActive()) {
         // already called show - no need to call it twice
         return;
     }
 
     if (!m_delayShowTime) {
         show();
         return;
     }
 
     m_delayedShowTimer.setSingleShot(true);
     m_delayedShowTimer.start(m_delayShowTime);
 }
 
 bool TabBox::handleMouseEvent(QMouseEvent *event)
 {
     if (!m_isShown && isDisplayed()) {
         // tabbox has been replaced, check effects
         if (effects && static_cast<EffectsHandlerImpl *>(effects)->checkInputWindowEvent(event)) {
             return true;
         }
     }
     switch (event->type()) {
     case QEvent::MouseMove:
         if (!m_tabBox->containsPos(event->globalPos())) {
             // filter out all events which are not on the TabBox window.
             // We don't want windows to react on the mouse events
             return true;
         }
         return false;
     case QEvent::MouseButtonPress:
         if ((!m_isShown && isDisplayed()) || !m_tabBox->containsPos(event->globalPos())) {
             close(); // click outside closes tab
             return true;
         }
         // fall through
     case QEvent::MouseButtonRelease:
     default:
         // we do not filter it out, the intenal filter takes care
         return false;
     }
     return false;
 }
 
 bool TabBox::handleWheelEvent(QWheelEvent *event)
 {
     if (!m_isShown && isDisplayed()) {
         // tabbox has been replaced, check effects
         if (effects && static_cast<EffectsHandlerImpl *>(effects)->checkInputWindowEvent(event)) {
             return true;
         }
     }
     if (event->angleDelta().y() == 0) {
         return false;
     }
     const QModelIndex index = m_tabBox->nextPrev(event->angleDelta().y() > 0);
     if (index.isValid()) {
         setCurrentIndex(index);
     }
     return true;
 }
 
 void TabBox::grabbedKeyEvent(QKeyEvent *event)
 {
     Q_EMIT tabBoxKeyEvent(event);
     if (!m_isShown && isDisplayed()) {
         // tabbox has been replaced, check effects
         return;
     }
     if (m_noModifierGrab) {
         if (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return || event->key() == Qt::Key_Space) {
             accept();
             return;
         }
     }
     m_tabBox->grabbedKeyEvent(event);
 }
 
 struct KeySymbolsDeleter
 {
     void operator()(xcb_key_symbols_t *symbols)
     {
         xcb_key_symbols_free(symbols);
     }
 };
 
 /**
  * Handles alt-tab / control-tab
  */
 static bool areKeySymXsDepressed(const uint keySyms[], int nKeySyms)
 {
     Xcb::QueryKeymap keys;
 
     std::unique_ptr<xcb_key_symbols_t, KeySymbolsDeleter> symbols(xcb_key_symbols_alloc(connection()));
     if (!symbols || !keys) {
         return false;
     }
     const auto keymap = keys->keys;
 
     bool depressed = false;
     for (int iKeySym = 0; iKeySym < nKeySyms; iKeySym++) {
         uint keySymX = keySyms[iKeySym];
         xcb_keycode_t *keyCodes = xcb_key_symbols_get_keycode(symbols.get(), keySymX);
         if (!keyCodes) {
             continue;
         }
 
         int j = 0;
         while (keyCodes[j] != XCB_NO_SYMBOL) {
             const xcb_keycode_t keyCodeX = keyCodes[j++];
             int i = keyCodeX / 8;
             char mask = 1 << (keyCodeX - (i * 8));
 
             if (i < 0 || i >= 32) {
                 continue;
             }
 
             qCDebug(KWIN_TABBOX) << iKeySym << ": keySymX=0x" << QString::number(keySymX, 16)
                                  << " i=" << i << " mask=0x" << QString::number(mask, 16)
                                  << " keymap[i]=0x" << QString::number(keymap[i], 16);
 
             if (keymap[i] & mask) {
                 depressed = true;
                 break;
             }
         }
 
         free(keyCodes);
     }
 
     return depressed;
 }
 
 static bool areModKeysDepressedX11(const QKeySequence &seq)
 {
     uint rgKeySyms[10];
     int nKeySyms = 0;
     int mod = seq[seq.count() - 1] & Qt::KeyboardModifierMask;
 
     if (mod & Qt::SHIFT) {
         rgKeySyms[nKeySyms++] = XK_Shift_L;
         rgKeySyms[nKeySyms++] = XK_Shift_R;
     }
     if (mod & Qt::CTRL) {
         rgKeySyms[nKeySyms++] = XK_Control_L;
         rgKeySyms[nKeySyms++] = XK_Control_R;
     }
     if (mod & Qt::ALT) {
         rgKeySyms[nKeySyms++] = XK_Alt_L;
         rgKeySyms[nKeySyms++] = XK_Alt_R;
     }
     if (mod & Qt::META) {
         // It would take some code to determine whether the Win key
         // is associated with Super or Meta, so check for both.
         // See bug #140023 for details.
         rgKeySyms[nKeySyms++] = XK_Super_L;
         rgKeySyms[nKeySyms++] = XK_Super_R;
         rgKeySyms[nKeySyms++] = XK_Meta_L;
         rgKeySyms[nKeySyms++] = XK_Meta_R;
     }
 
     return areKeySymXsDepressed(rgKeySyms, nKeySyms);
 }
 
 static bool areModKeysDepressedWayland(const QKeySequence &seq)
 {
     const int mod = seq[seq.count() - 1] & Qt::KeyboardModifierMask;
     const Qt::KeyboardModifiers mods = input()->modifiersRelevantForGlobalShortcuts();
     if ((mod & Qt::SHIFT) && mods.testFlag(Qt::ShiftModifier)) {
         return true;
     }
     if ((mod & Qt::CTRL) && mods.testFlag(Qt::ControlModifier)) {
         return true;
     }
     if ((mod & Qt::ALT) && mods.testFlag(Qt::AltModifier)) {
         return true;
     }
     if ((mod & Qt::META) && mods.testFlag(Qt::MetaModifier)) {
         return true;
     }
     return false;
 }
 
 static bool areModKeysDepressed(const QKeySequence &seq)
 {
     if (seq.isEmpty()) {
         return false;
     }
     if (kwinApp()->shouldUseWaylandForCompositing()) {
         return areModKeysDepressedWayland(seq);
     } else {
         return areModKeysDepressedX11(seq);
     }
 }
 
 void TabBox::navigatingThroughWindows(bool forward, const QKeySequence &shortcut, TabBoxMode mode)
 {
     if (!m_ready || isGrabbed()) {
         return;
     }
     if (!options->focusPolicyIsReasonable()) {
         // ungrabXKeyboard(); // need that because of accelerator raw mode
         //  CDE style raise / lower
         CDEWalkThroughWindows(forward);
     } else {
         if (areModKeysDepressed(shortcut)) {
             if (startKDEWalkThroughWindows(mode)) {
                 KDEWalkThroughWindows(forward);
             }
         } else {
             // if the shortcut has no modifiers, don't show the tabbox,
             // don't grab, but simply go to the next window
             KDEOneStepThroughWindows(forward, mode);
         }
     }
 }
 
 void TabBox::slotWalkThroughWindows()
 {
     navigatingThroughWindows(true, m_cutWalkThroughWindows, TabBoxWindowsMode);
 }
 
 void TabBox::slotWalkBackThroughWindows()
 {
     navigatingThroughWindows(false, m_cutWalkThroughWindowsReverse, TabBoxWindowsMode);
 }
 
 void TabBox::slotWalkThroughWindowsAlternative()
 {
     navigatingThroughWindows(true, m_cutWalkThroughWindowsAlternative, TabBoxWindowsAlternativeMode);
 }
 
 void TabBox::slotWalkBackThroughWindowsAlternative()
 {
     navigatingThroughWindows(false, m_cutWalkThroughWindowsAlternativeReverse, TabBoxWindowsAlternativeMode);
 }
 
 void TabBox::slotWalkThroughCurrentAppWindows()
 {
     navigatingThroughWindows(true, m_cutWalkThroughCurrentAppWindows, TabBoxCurrentAppWindowsMode);
 }
 
 void TabBox::slotWalkBackThroughCurrentAppWindows()
 {
     navigatingThroughWindows(false, m_cutWalkThroughCurrentAppWindowsReverse, TabBoxCurrentAppWindowsMode);
 }
 
 void TabBox::slotWalkThroughCurrentAppWindowsAlternative()
 {
     navigatingThroughWindows(true, m_cutWalkThroughCurrentAppWindowsAlternative, TabBoxCurrentAppWindowsAlternativeMode);
 }
 
 void TabBox::slotWalkBackThroughCurrentAppWindowsAlternative()
 {
     navigatingThroughWindows(false, m_cutWalkThroughCurrentAppWindowsAlternativeReverse, TabBoxCurrentAppWindowsAlternativeMode);
 }
 
 void TabBox::slotWalkThroughDesktops()
 {
     if (!m_ready || isGrabbed()) {
         return;
     }
     if (areModKeysDepressed(m_cutWalkThroughDesktops)) {
         if (startWalkThroughDesktops()) {
             walkThroughDesktops(true);
         }
     } else {
         oneStepThroughDesktops(true);
     }
 }
 
 void TabBox::slotWalkBackThroughDesktops()
 {
     if (!m_ready || isGrabbed()) {
         return;
     }
     if (areModKeysDepressed(m_cutWalkThroughDesktopsReverse)) {
         if (startWalkThroughDesktops()) {
             walkThroughDesktops(false);
         }
     } else {
         oneStepThroughDesktops(false);
     }
 }
 
 void TabBox::slotWalkThroughDesktopList()
 {
     if (!m_ready || isGrabbed()) {
         return;
     }
     if (areModKeysDepressed(m_cutWalkThroughDesktopList)) {
         if (startWalkThroughDesktopList()) {
             walkThroughDesktops(true);
         }
     } else {
         oneStepThroughDesktopList(true);
     }
 }
 
 void TabBox::slotWalkBackThroughDesktopList()
 {
     if (!m_ready || isGrabbed()) {
         return;
     }
     if (areModKeysDepressed(m_cutWalkThroughDesktopListReverse)) {
         if (startWalkThroughDesktopList()) {
             walkThroughDesktops(false);
         }
     } else {
         oneStepThroughDesktopList(false);
     }
 }
 
 void TabBox::shadeActivate(Window *c)
 {
     if ((c->shadeMode() == ShadeNormal || c->shadeMode() == ShadeHover) && options->isShadeHover()) {
         c->setShade(ShadeActivated);
     }
 }
 
 bool TabBox::toggle(ElectricBorder eb)
 {
     if (m_borderAlternativeActivate.contains(eb)) {
         return toggleMode(TabBoxWindowsAlternativeMode);
     } else {
         return toggleMode(TabBoxWindowsMode);
     }
 }
 
 bool TabBox::toggleMode(TabBoxMode mode)
 {
     if (!options->focusPolicyIsReasonable()) {
         return false; // not supported.
     }
     if (isDisplayed()) {
         accept();
         return true;
     }
     if (!establishTabBoxGrab()) {
         return false;
     }
     m_noModifierGrab = m_tabGrab = true;
     setMode(mode);
     reset();
     show();
     return true;
 }
 
 bool TabBox::startKDEWalkThroughWindows(TabBoxMode mode)
 {
     if (!establishTabBoxGrab()) {
         return false;
     }
     m_tabGrab = true;
     m_noModifierGrab = false;
     setMode(mode);
     reset();
     return true;
 }
 
 bool TabBox::startWalkThroughDesktops(TabBoxMode mode)
 {
     if (!establishTabBoxGrab()) {
         return false;
     }
     m_desktopGrab = true;
     m_noModifierGrab = false;
     setMode(mode);
     reset();
     return true;
 }
 
 bool TabBox::startWalkThroughDesktops()
 {
     return startWalkThroughDesktops(TabBoxDesktopMode);
 }
 
 bool TabBox::startWalkThroughDesktopList()
 {
     return startWalkThroughDesktops(TabBoxDesktopListMode);
 }
 
 void TabBox::KDEWalkThroughWindows(bool forward)
 {
     nextPrev(forward);
     delayedShow();
 }
 
 void TabBox::walkThroughDesktops(bool forward)
 {
     nextPrev(forward);
     delayedShow();
 }
 
 void TabBox::CDEWalkThroughWindows(bool forward)
 {
     Window *c = nullptr;
     // this function find the first suitable client for unreasonable focus
     // policies - the topmost one, with some exceptions (can't be keepabove/below,
     // otherwise it gets stuck on them)
     //     Q_ASSERT(Workspace::self()->block_stacking_updates == 0);
     for (int i = Workspace::self()->stackingOrder().size() - 1; i >= 0; --i) {
         auto t = Workspace::self()->stackingOrder().at(i);
         if (t->isClient() && t->isOnCurrentActivity() && t->isOnCurrentDesktop() && !t->isSpecialWindow()
             && !t->isShade() && t->isShown() && t->wantsTabFocus()
             && !t->keepAbove() && !t->keepBelow()) {
             c = t;
             break;
         }
     }
     Window *nc = c;
     bool options_traverse_all;
     {
         KConfigGroup group(kwinApp()->config(), "TabBox");
         options_traverse_all = group.readEntry("TraverseAll", false);
     }
 
     Window *firstClient = nullptr;
     do {
         nc = forward ? nextClientStatic(nc) : previousClientStatic(nc);
         if (!firstClient) {
             // When we see our first client for the second time,
             // it's time to stop.
             firstClient = nc;
         } else if (nc == firstClient) {
             // No candidates found.
             nc = nullptr;
             break;
         }
     } while (nc && nc != c && ((!options_traverse_all && !nc->isOnDesktop(currentDesktop())) || nc->isMinimized() || !nc->wantsTabFocus() || nc->keepAbove() || nc->keepBelow() || !nc->isOnCurrentActivity()));
     if (nc) {
         if (c && c != nc) {
             Workspace::self()->lowerWindow(c);
         }
         if (options->focusPolicyIsReasonable()) {
             Workspace::self()->activateWindow(nc);
             shadeActivate(nc);
         } else {
             if (!nc->isOnDesktop(currentDesktop())) {
                 setCurrentDesktop(nc->desktop());
             }
             Workspace::self()->raiseWindow(nc);
         }
     }
 }
 
 void TabBox::KDEOneStepThroughWindows(bool forward, TabBoxMode mode)
 {
     setMode(mode);
     reset();
     nextPrev(forward);
     if (Window *c = currentClient()) {
         Workspace::self()->activateWindow(c);
         shadeActivate(c);
     }
 }
 
 void TabBox::oneStepThroughDesktops(bool forward, TabBoxMode mode)
 {
     setMode(mode);
     reset();
     nextPrev(forward);
     if (currentDesktop() != -1) {
         setCurrentDesktop(currentDesktop());
     }
 }
 
 void TabBox::oneStepThroughDesktops(bool forward)
 {
     oneStepThroughDesktops(forward, TabBoxDesktopMode);
 }
 
 void TabBox::oneStepThroughDesktopList(bool forward)
 {
     oneStepThroughDesktops(forward, TabBoxDesktopListMode);
 }
 
 void TabBox::keyPress(int keyQt)
 {
     enum Direction {
         Backward = -1,
         Steady = 0,
         Forward = 1,
     };
     Direction direction(Steady);
 
     auto contains = [](const QKeySequence &shortcut, int key) -> bool {
         for (int i = 0; i < shortcut.count(); ++i) {
             if (shortcut[i] == key) {
                 return true;
             }
         }
         return false;
     };
 
     // tests whether a shortcut matches and handles pitfalls on ShiftKey invocation
     auto directionFor = [keyQt, contains](const QKeySequence &forward, const QKeySequence &backward) -> Direction {
         if (contains(forward, keyQt)) {
             return Forward;
         }
         if (contains(backward, keyQt)) {
             return Backward;
         }
         if (!(keyQt & Qt::ShiftModifier)) {
             return Steady;
         }
 
         // Before testing the unshifted key (Ctrl+A vs. Ctrl+Shift+a etc.), see whether this is +Shift+Tab
         // and check that against +Shift+Backtab (as well)
         Qt::KeyboardModifiers mods = Qt::ShiftModifier | Qt::ControlModifier | Qt::AltModifier | Qt::MetaModifier | Qt::KeypadModifier | Qt::GroupSwitchModifier;
         mods &= keyQt;
         if ((keyQt & ~mods) == Qt::Key_Tab) {
             if (contains(forward, mods | Qt::Key_Backtab)) {
                 return Forward;
             }
             if (contains(backward, mods | Qt::Key_Backtab)) {
                 return Backward;
             }
         }
 
         // if the shortcuts do not match, try matching again after filtering the shift key from keyQt
         // it is needed to handle correctly the ALT+~ shorcut for example as it is coded as ALT+SHIFT+~ in keyQt
         if (contains(forward, keyQt & ~Qt::ShiftModifier)) {
             return Forward;
         }
         if (contains(backward, keyQt & ~Qt::ShiftModifier)) {
             return Backward;
         }
 
         return Steady;
     };
 
     if (m_tabGrab) {
         static const int ModeCount = 4;
         static const TabBoxMode modes[ModeCount] = {
             TabBoxWindowsMode, TabBoxWindowsAlternativeMode,
             TabBoxCurrentAppWindowsMode, TabBoxCurrentAppWindowsAlternativeMode};
         const QKeySequence cuts[2 * ModeCount] = {
             // forward
             m_cutWalkThroughWindows, m_cutWalkThroughWindowsAlternative,
             m_cutWalkThroughCurrentAppWindows, m_cutWalkThroughCurrentAppWindowsAlternative,
             // backward
             m_cutWalkThroughWindowsReverse, m_cutWalkThroughWindowsAlternativeReverse,
             m_cutWalkThroughCurrentAppWindowsReverse, m_cutWalkThroughCurrentAppWindowsAlternativeReverse};
         bool testedCurrent = false; // in case of collision, prefer to stay in the current mode
         int i = 0, j = 0;
         while (true) {
             if (!testedCurrent && modes[i] != mode()) {
                 ++j;
                 i = (i + 1) % ModeCount;
                 continue;
             }
             if (testedCurrent && modes[i] == mode()) {
                 break;
             }
             testedCurrent = true;
             direction = directionFor(cuts[i], cuts[i + ModeCount]);
             if (direction != Steady) {
                 if (modes[i] != mode()) {
                     accept(false);
                     setMode(modes[i]);
                     auto replayWithChangedTabboxMode = [this, direction]() {
                         reset();
                         nextPrev(direction == Forward);
                     };
                     QTimer::singleShot(50, this, replayWithChangedTabboxMode);
                 }
                 break;
             } else if (++j > 2 * ModeCount) { // guarding counter for invalid modes
                 qCDebug(KWIN_TABBOX) << "Invalid TabBoxMode";
                 return;
             }
             i = (i + 1) % ModeCount;
         }
         if (direction != Steady) {
             qCDebug(KWIN_TABBOX) << "== " << cuts[i].toString() << " or " << cuts[i + ModeCount].toString();
             KDEWalkThroughWindows(direction == Forward);
         }
     } else if (m_desktopGrab) {
         direction = directionFor(m_cutWalkThroughDesktops, m_cutWalkThroughDesktopsReverse);
         if (direction == Steady) {
             direction = directionFor(m_cutWalkThroughDesktopList, m_cutWalkThroughDesktopListReverse);
         }
         if (direction != Steady) {
             walkThroughDesktops(direction == Forward);
         }
     }
 
     if (m_desktopGrab || m_tabGrab) {
         if (((keyQt & ~Qt::KeyboardModifierMask) == Qt::Key_Escape) && direction == Steady) {
             // if Escape is part of the shortcut, don't cancel
             close(true);
         } else if (direction == Steady) {
             QKeyEvent event(QEvent::KeyPress, keyQt & ~Qt::KeyboardModifierMask, Qt::NoModifier);
             grabbedKeyEvent(&event);
         }
     }
 }
 
 void TabBox::close(bool abort)
 {
     if (isGrabbed()) {
         removeTabBoxGrab();
     }
     hide(abort);
     input()->pointer()->setEnableConstraints(true);
     m_tabGrab = false;
     m_desktopGrab = false;
     m_noModifierGrab = false;
 }
 
 void TabBox::accept(bool closeTabBox)
 {
     Window *c = currentClient();
     if (closeTabBox) {
         close();
     }
     if (c) {
         Workspace::self()->activateWindow(c);
         shadeActivate(c);
         if (c->isDesktop()) {
             Workspace::self()->setShowingDesktop(!Workspace::self()->showingDesktop(), !m_desktopListConfig.isHighlightWindows());
         }
     }
 }
 
 void TabBox::modifiersReleased()
 {
     if (m_noModifierGrab) {
         return;
     }
     if (m_tabGrab) {
         bool old_control_grab = m_desktopGrab;
         accept();
         m_desktopGrab = old_control_grab;
     }
     if (m_desktopGrab) {
         bool old_tab_grab = m_tabGrab;
         int desktop = currentDesktop();
         close();
         m_tabGrab = old_tab_grab;
         if (desktop != -1) {
             setCurrentDesktop(desktop);
             VirtualDesktopManager::self()->setCurrent(desktop);
         }
     }
 }
 
 int TabBox::nextDesktopStatic(int iDesktop) const
 {
     return VirtualDesktopManager::self()->inDirection(iDesktop, VirtualDesktopManager::Direction::Next, true);
 }
 
 int TabBox::previousDesktopStatic(int iDesktop) const
 {
     return VirtualDesktopManager::self()->inDirection(iDesktop, VirtualDesktopManager::Direction::Previous, true);
 }
 
 /**
  * Auxiliary functions to travers all clients according to the static
  * order. Useful for the CDE-style Alt-tab feature.
  */
 Window *TabBox::nextClientStatic(Window *c) const
 {
     const auto &list = Workspace::self()->allClientList();
     if (!c || list.isEmpty()) {
         return nullptr;
     }
     int pos = list.indexOf(c);
     if (pos == -1) {
         return list.first();
     }
     ++pos;
     if (pos == list.count()) {
         return list.first();
     }
     return list.at(pos);
 }
 
 /**
  * Auxiliary functions to travers all clients according to the static
  * order. Useful for the CDE-style Alt-tab feature.
  */
 Window *TabBox::previousClientStatic(Window *c) const
 {
     const auto &list = Workspace::self()->allClientList();
     if (!c || list.isEmpty()) {
         return nullptr;
     }
     int pos = list.indexOf(c);
     if (pos == -1) {
         return list.last();
     }
     if (pos == 0) {
         return list.last();
     }
     --pos;
     return list.at(pos);
 }
 
 bool TabBox::establishTabBoxGrab()
 {
     if (kwinApp()->shouldUseWaylandForCompositing()) {
         m_forcedGlobalMouseGrab = true;
         return true;
     }
     kwinApp()->updateXTime();
     if (!grabXKeyboard()) {
         return false;
     }
     // Don't try to establish a global mouse grab using XGrabPointer, as that would prevent
     // using Alt+Tab while DND (#44972). However force passive grabs on all windows
     // in order to catch MouseRelease events and close the tabbox (#67416).
     // All clients already have passive grabs in their wrapper windows, so check only
     // the active client, which may not have it.
     Q_ASSERT(!m_forcedGlobalMouseGrab);
     m_forcedGlobalMouseGrab = true;
     if (Workspace::self()->activeWindow() != nullptr) {
         Workspace::self()->activeWindow()->updateMouseGrab();
     }
     m_x11EventFilter.reset(new X11Filter);
     return true;
 }
 
 void TabBox::removeTabBoxGrab()
 {
     if (kwinApp()->shouldUseWaylandForCompositing()) {
         m_forcedGlobalMouseGrab = false;
         return;
     }
     kwinApp()->updateXTime();
     ungrabXKeyboard();
     Q_ASSERT(m_forcedGlobalMouseGrab);
     m_forcedGlobalMouseGrab = false;
     if (Workspace::self()->activeWindow() != nullptr) {
         Workspace::self()->activeWindow()->updateMouseGrab();
     }
     m_x11EventFilter.reset();
 }
 } // namespace TabBox
 } // namespace