File indexing completed on 2024-04-28 05:45:04

 /*
  * SPDX-FileCopyrightText: 2011 Peter Penz <peter.penz19@gmail.com>
  * SPDX-FileCopyrightText: 2013 Frank Reininghaus <frank78ac@googlemail.com>
  * SPDX-FileCopyrightText: 2013 Emmanuel Pescosta <emmanuelpescosta099@gmail.com>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "kfileitemmodel.h"
 
 #include "dolphin_contentdisplaysettings.h"
 #include "dolphin_generalsettings.h"
 #include "dolphindebug.h"
 #include "private/kfileitemmodelsortalgorithm.h"
 
 #include <KDirLister>
 #include <KIO/Job>
 #include <KIO/ListJob>
 #include <KLocalizedString>
 #include <KUrlMimeData>
 
 #include <QElapsedTimer>
 #include <QIcon>
 #include <QMimeData>
 #include <QMimeDatabase>
 #include <QRecursiveMutex>
 #include <QTimer>
 #include <QWidget>
 #include <klazylocalizedstring.h>
 
 Q_GLOBAL_STATIC(QRecursiveMutex, s_collatorMutex)
 
 // #define KFILEITEMMODEL_DEBUG
 
 KFileItemModel::KFileItemModel(QObject *parent)
     : KItemModelBase("text", parent)
     , m_dirLister(nullptr)
     , m_sortDirsFirst(true)
     , m_sortHiddenLast(false)
     , m_sortRole(NameRole)
     , m_sortingProgressPercent(-1)
     , m_roles()
     , m_itemData()
     , m_items()
     , m_filter()
     , m_filteredItems()
     , m_requestRole()
     , m_maximumUpdateIntervalTimer(nullptr)
     , m_resortAllItemsTimer(nullptr)
     , m_pendingItemsToInsert()
     , m_groups()
     , m_expandedDirs()
     , m_urlsToExpand()
 {
     m_collator.setNumericMode(true);
 
     loadSortingSettings();
 
     m_dirLister = new KDirLister(this);
     m_dirLister->setAutoErrorHandlingEnabled(false);
     m_dirLister->setDelayedMimeTypes(true);
 
     const QWidget *parentWidget = qobject_cast<QWidget *>(parent);
     if (parentWidget) {
         m_dirLister->setMainWindow(parentWidget->window());
     }
 
     connect(m_dirLister, &KCoreDirLister::started, this, &KFileItemModel::directoryLoadingStarted);
     connect(m_dirLister, &KCoreDirLister::canceled, this, &KFileItemModel::slotCanceled);
     connect(m_dirLister, &KCoreDirLister::itemsAdded, this, &KFileItemModel::slotItemsAdded);
     connect(m_dirLister, &KCoreDirLister::itemsDeleted, this, &KFileItemModel::slotItemsDeleted);
     connect(m_dirLister, &KCoreDirLister::refreshItems, this, &KFileItemModel::slotRefreshItems);
     connect(m_dirLister, &KCoreDirLister::clear, this, &KFileItemModel::slotClear);
     connect(m_dirLister, &KCoreDirLister::infoMessage, this, &KFileItemModel::infoMessage);
     connect(m_dirLister, &KCoreDirLister::jobError, this, &KFileItemModel::slotListerError);
     connect(m_dirLister, &KCoreDirLister::percent, this, &KFileItemModel::directoryLoadingProgress);
     connect(m_dirLister, &KCoreDirLister::redirection, this, &KFileItemModel::directoryRedirection);
     connect(m_dirLister, &KCoreDirLister::listingDirCompleted, this, &KFileItemModel::slotCompleted);
 
     // Apply default roles that should be determined
     resetRoles();
     m_requestRole[NameRole] = true;
     m_requestRole[IsDirRole] = true;
     m_requestRole[IsLinkRole] = true;
     m_roles.insert("text");
     m_roles.insert("isDir");
     m_roles.insert("isLink");
     m_roles.insert("isHidden");
 
     // For slow KIO-slaves like used for searching it makes sense to show results periodically even
     // before the completed() or canceled() signal has been emitted.
     m_maximumUpdateIntervalTimer = new QTimer(this);
     m_maximumUpdateIntervalTimer->setInterval(2000);
     m_maximumUpdateIntervalTimer->setSingleShot(true);
     connect(m_maximumUpdateIntervalTimer, &QTimer::timeout, this, &KFileItemModel::dispatchPendingItemsToInsert);
 
     // When changing the value of an item which represents the sort-role a resorting must be
     // triggered. Especially in combination with KFileItemModelRolesUpdater this might be done
     // for a lot of items within a quite small timeslot. To prevent expensive resortings the
     // resorting is postponed until the timer has been exceeded.
     m_resortAllItemsTimer = new QTimer(this);
     m_resortAllItemsTimer->setInterval(100); // 100 is a middle ground between sorting too frequently which makes the view unreadable
                                              // and sorting too infrequently which leads to users seeing an outdated sort order.
     m_resortAllItemsTimer->setSingleShot(true);
     connect(m_resortAllItemsTimer, &QTimer::timeout, this, &KFileItemModel::resortAllItems);
 
     connect(GeneralSettings::self(), &GeneralSettings::sortingChoiceChanged, this, &KFileItemModel::slotSortingChoiceChanged);
 
     setShowTrashMime(m_dirLister->showHiddenFiles() || !GeneralSettings::hideXTrashFile());
 }
 
 KFileItemModel::~KFileItemModel()
 {
     qDeleteAll(m_itemData);
     qDeleteAll(m_filteredItems);
     qDeleteAll(m_pendingItemsToInsert);
 }
 
 void KFileItemModel::loadDirectory(const QUrl &url)
 {
     m_dirLister->openUrl(url);
 }
 
 void KFileItemModel::refreshDirectory(const QUrl &url)
 {
     // Refresh all expanded directories first (Bug 295300)
     QHashIterator<QUrl, QUrl> expandedDirs(m_expandedDirs);
     while (expandedDirs.hasNext()) {
         expandedDirs.next();
         m_dirLister->openUrl(expandedDirs.value(), KDirLister::Reload);
     }
 
     m_dirLister->openUrl(url, KDirLister::Reload);
 
     Q_EMIT directoryRefreshing();
 }
 
 QUrl KFileItemModel::directory() const
 {
     return m_dirLister->url();
 }
 
 void KFileItemModel::cancelDirectoryLoading()
 {
     m_dirLister->stop();
 }
 
 int KFileItemModel::count() const
 {
     return m_itemData.count();
 }
 
 QHash<QByteArray, QVariant> KFileItemModel::data(int index) const
 {
     if (index >= 0 && index < count()) {
         ItemData *data = m_itemData.at(index);
         if (data->values.isEmpty()) {
             data->values = retrieveData(data->item, data->parent);
         } else if (data->values.count() <= 2 && data->values.value("isExpanded").toBool()) {
             // Special case dealt by slotRefreshItems(), avoid losing the "isExpanded" and "expandedParentsCount" state when refreshing
             // slotRefreshItems() makes sure folders keep the "isExpanded" and "expandedParentsCount" while clearing the remaining values
             // so this special request of different behavior can be identified here.
             bool hasExpandedParentsCount = false;
             const int expandedParentsCount = data->values.value("expandedParentsCount").toInt(&hasExpandedParentsCount);
 
             data->values = retrieveData(data->item, data->parent);
             data->values.insert("isExpanded", true);
             if (hasExpandedParentsCount) {
                 data->values.insert("expandedParentsCount", expandedParentsCount);
             }
         }
 
         return data->values;
     }
     return QHash<QByteArray, QVariant>();
 }
 
 bool KFileItemModel::setData(int index, const QHash<QByteArray, QVariant> &values)
 {
     if (index < 0 || index >= count()) {
         return false;
     }
 
     QHash<QByteArray, QVariant> currentValues = data(index);
 
     // Determine which roles have been changed
     QSet<QByteArray> changedRoles;
     QHashIterator<QByteArray, QVariant> it(values);
     while (it.hasNext()) {
         it.next();
         const QByteArray role = sharedValue(it.key());
         const QVariant value = it.value();
 
         if (currentValues[role] != value) {
             currentValues[role] = value;
             changedRoles.insert(role);
         }
     }
 
     if (changedRoles.isEmpty()) {
         return false;
     }
 
     m_itemData[index]->values = currentValues;
     if (changedRoles.contains("text")) {
         QUrl url = m_itemData[index]->item.url();
         url = url.adjusted(QUrl::RemoveFilename);
         url.setPath(url.path() + currentValues["text"].toString());
         m_itemData[index]->item.setUrl(url);
     }
 
     emitItemsChangedAndTriggerResorting(KItemRangeList() << KItemRange(index, 1), changedRoles);
 
     return true;
 }
 
 void KFileItemModel::setSortDirectoriesFirst(bool dirsFirst)
 {
     if (dirsFirst != m_sortDirsFirst) {
         m_sortDirsFirst = dirsFirst;
         resortAllItems();
     }
 }
 
 bool KFileItemModel::sortDirectoriesFirst() const
 {
     return m_sortDirsFirst;
 }
 
 void KFileItemModel::setSortHiddenLast(bool hiddenLast)
 {
     if (hiddenLast != m_sortHiddenLast) {
         m_sortHiddenLast = hiddenLast;
         resortAllItems();
     }
 }
 
 bool KFileItemModel::sortHiddenLast() const
 {
     return m_sortHiddenLast;
 }
 
 void KFileItemModel::setShowTrashMime(bool showTrashMime)
 {
     const auto trashMime = QStringLiteral("application/x-trash");
     QStringList excludeFilter = m_filter.excludeMimeTypes();
 
     if (showTrashMime) {
         excludeFilter.removeAll(trashMime);
     } else if (!excludeFilter.contains(trashMime)) {
         excludeFilter.append(trashMime);
     }
 
     setExcludeMimeTypeFilter(excludeFilter);
 }
 
 void KFileItemModel::scheduleResortAllItems()
 {
     if (!m_resortAllItemsTimer->isActive()) {
         m_resortAllItemsTimer->start();
     }
 }
 
 void KFileItemModel::setShowHiddenFiles(bool show)
 {
     m_dirLister->setShowHiddenFiles(show);
     setShowTrashMime(show || !GeneralSettings::hideXTrashFile());
     m_dirLister->emitChanges();
     if (show) {
         dispatchPendingItemsToInsert();
     }
 }
 
 bool KFileItemModel::showHiddenFiles() const
 {
     return m_dirLister->showHiddenFiles();
 }
 
 void KFileItemModel::setShowDirectoriesOnly(bool enabled)
 {
     m_dirLister->setDirOnlyMode(enabled);
 }
 
 bool KFileItemModel::showDirectoriesOnly() const
 {
     return m_dirLister->dirOnlyMode();
 }
 
 QMimeData *KFileItemModel::createMimeData(const KItemSet &indexes) const
 {
     QMimeData *data = new QMimeData();
 
     // The following code has been taken from KDirModel::mimeData()
     // (kdelibs/kio/kio/kdirmodel.cpp)
     // SPDX-FileCopyrightText: 2006 David Faure <faure@kde.org>
     QList<QUrl> urls;
     QList<QUrl> mostLocalUrls;
     const ItemData *lastAddedItem = nullptr;
 
     for (int index : indexes) {
         const ItemData *itemData = m_itemData.at(index);
         const ItemData *parent = itemData->parent;
 
         while (parent && parent != lastAddedItem) {
             parent = parent->parent;
         }
 
         if (parent && parent == lastAddedItem) {
             // A parent of 'itemData' has been added already.
             continue;
         }
 
         lastAddedItem = itemData;
         const KFileItem &item = itemData->item;
         if (!item.isNull()) {
             urls << item.url();
 
             bool isLocal;
             mostLocalUrls << item.mostLocalUrl(&isLocal);
         }
     }
 
     KUrlMimeData::setUrls(urls, mostLocalUrls, data);
     return data;
 }
 
 int KFileItemModel::indexForKeyboardSearch(const QString &text, int startFromIndex) const
 {
     startFromIndex = qMax(0, startFromIndex);
     for (int i = startFromIndex; i < count(); ++i) {
         if (fileItem(i).text().startsWith(text, Qt::CaseInsensitive)) {
             return i;
         }
     }
     for (int i = 0; i < startFromIndex; ++i) {
         if (fileItem(i).text().startsWith(text, Qt::CaseInsensitive)) {
             return i;
         }
     }
     return -1;
 }
 
 bool KFileItemModel::supportsDropping(int index) const
 {
     KFileItem item;
     if (index == -1) {
         item = rootItem();
     } else {
         item = fileItem(index);
     }
     return !item.isNull() && ((item.isDir() && item.isWritable()) || item.isDesktopFile());
 }
 
 QString KFileItemModel::roleDescription(const QByteArray &role) const
 {
     static QHash<QByteArray, QString> description;
     if (description.isEmpty()) {
         int count = 0;
         const RoleInfoMap *map = rolesInfoMap(count);
         for (int i = 0; i < count; ++i) {
             if (map[i].roleTranslation.isEmpty()) {
                 continue;
             }
             description.insert(map[i].role, map[i].roleTranslation.toString());
         }
     }
 
     return description.value(role);
 }
 
 QList<QPair<int, QVariant>> KFileItemModel::groups() const
 {
     if (!m_itemData.isEmpty() && m_groups.isEmpty()) {
 #ifdef KFILEITEMMODEL_DEBUG
         QElapsedTimer timer;
         timer.start();
 #endif
         switch (typeForRole(sortRole())) {
         case NameRole:
             m_groups = nameRoleGroups();
             break;
         case SizeRole:
             m_groups = sizeRoleGroups();
             break;
         case ModificationTimeRole:
             m_groups = timeRoleGroups([](const ItemData *item) {
                 return item->item.time(KFileItem::ModificationTime);
             });
             break;
         case CreationTimeRole:
             m_groups = timeRoleGroups([](const ItemData *item) {
                 return item->item.time(KFileItem::CreationTime);
             });
             break;
         case AccessTimeRole:
             m_groups = timeRoleGroups([](const ItemData *item) {
                 return item->item.time(KFileItem::AccessTime);
             });
             break;
         case DeletionTimeRole:
             m_groups = timeRoleGroups([](const ItemData *item) {
                 return item->values.value("deletiontime").toDateTime();
             });
             break;
         case PermissionsRole:
             m_groups = permissionRoleGroups();
             break;
         case RatingRole:
             m_groups = ratingRoleGroups();
             break;
         default:
             m_groups = genericStringRoleGroups(sortRole());
             break;
         }
 
 #ifdef KFILEITEMMODEL_DEBUG
         qCDebug(DolphinDebug) << "[TIME] Calculating groups for" << count() << "items:" << timer.elapsed();
 #endif
     }
 
     return m_groups;
 }
 
 KFileItem KFileItemModel::fileItem(int index) const
 {
     if (index >= 0 && index < count()) {
         return m_itemData.at(index)->item;
     }
 
     return KFileItem();
 }
 
 KFileItem KFileItemModel::fileItem(const QUrl &url) const
 {
     const int indexForUrl = index(url);
     if (indexForUrl >= 0) {
         return m_itemData.at(indexForUrl)->item;
     }
     return KFileItem();
 }
 
 int KFileItemModel::index(const KFileItem &item) const
 {
     return index(item.url());
 }
 
 int KFileItemModel::index(const QUrl &url) const
 {
     const QUrl urlToFind = url.adjusted(QUrl::StripTrailingSlash);
 
     const int itemCount = m_itemData.count();
     int itemsInHash = m_items.count();
 
     int index = m_items.value(urlToFind, -1);
     while (index < 0 && itemsInHash < itemCount) {
         // Not all URLs are stored yet in m_items. We grow m_items until either
         // urlToFind is found, or all URLs have been stored in m_items.
         // Note that we do not add the URLs to m_items one by one, but in
         // larger blocks. After each block, we check if urlToFind is in
         // m_items. We could in principle compare urlToFind with each URL while
         // we are going through m_itemData, but comparing two QUrls will,
         // unlike calling qHash for the URLs, trigger a parsing of the URLs
         // which costs both CPU cycles and memory.
         const int blockSize = 1000;
         const int currentBlockEnd = qMin(itemsInHash + blockSize, itemCount);
         for (int i = itemsInHash; i < currentBlockEnd; ++i) {
             const QUrl nextUrl = m_itemData.at(i)->item.url();
             m_items.insert(nextUrl, i);
         }
 
         itemsInHash = currentBlockEnd;
         index = m_items.value(urlToFind, -1);
     }
 
     if (index < 0) {
         // The item could not be found, even though all items from m_itemData
         // should be in m_items now. We print some diagnostic information which
         // might help to find the cause of the problem, but only once. This
         // prevents that obtaining and printing the debugging information
         // wastes CPU cycles and floods the shell or .xsession-errors.
         static bool printDebugInfo = true;
 
         if (m_items.count() != m_itemData.count() && printDebugInfo) {
             printDebugInfo = false;
 
             qCWarning(DolphinDebug) << "The model is in an inconsistent state.";
             qCWarning(DolphinDebug) << "m_items.count()    ==" << m_items.count();
             qCWarning(DolphinDebug) << "m_itemData.count() ==" << m_itemData.count();
 
             // Check if there are multiple items with the same URL.
             QMultiHash<QUrl, int> indexesForUrl;
             for (int i = 0; i < m_itemData.count(); ++i) {
                 indexesForUrl.insert(m_itemData.at(i)->item.url(), i);
             }
 
             const auto uniqueKeys = indexesForUrl.uniqueKeys();
             for (const QUrl &url : uniqueKeys) {
                 if (indexesForUrl.count(url) > 1) {
                     qCWarning(DolphinDebug) << "Multiple items found with the URL" << url;
 
                     auto it = indexesForUrl.find(url);
                     while (it != indexesForUrl.end() && it.key() == url) {
                         const ItemData *data = m_itemData.at(it.value());
                         qCWarning(DolphinDebug) << "index" << it.value() << ":" << data->item;
                         if (data->parent) {
                             qCWarning(DolphinDebug) << "parent" << data->parent->item;
                         }
                         ++it;
                     }
                 }
             }
         }
     }
 
     return index;
 }
 
 KFileItem KFileItemModel::rootItem() const
 {
     return m_dirLister->rootItem();
 }
 
 void KFileItemModel::clear()
 {
     slotClear();
 }
 
 void KFileItemModel::setRoles(const QSet<QByteArray> &roles)
 {
     if (m_roles == roles) {
         return;
     }
 
     const QSet<QByteArray> changedRoles = (roles - m_roles) + (m_roles - roles);
     m_roles = roles;
 
     if (count() > 0) {
         const bool supportedExpanding = m_requestRole[ExpandedParentsCountRole];
         const bool willSupportExpanding = roles.contains("expandedParentsCount");
         if (supportedExpanding && !willSupportExpanding) {
             // No expanding is supported anymore. Take care to delete all items that have an expansion level
             // that is not 0 (and hence are part of an expanded item).
             removeExpandedItems();
         }
     }
 
     m_groups.clear();
     resetRoles();
 
     QSetIterator<QByteArray> it(roles);
     while (it.hasNext()) {
         const QByteArray &role = it.next();
         m_requestRole[typeForRole(role)] = true;
     }
 
     if (count() > 0) {
         // Update m_data with the changed requested roles
         const int maxIndex = count() - 1;
         for (int i = 0; i <= maxIndex; ++i) {
             m_itemData[i]->values = retrieveData(m_itemData.at(i)->item, m_itemData.at(i)->parent);
         }
 
         Q_EMIT itemsChanged(KItemRangeList() << KItemRange(0, count()), changedRoles);
     }
 
     // Clear the 'values' of all filtered items. They will be re-populated with the
     // correct roles the next time 'values' will be accessed via data(int).
     QHash<KFileItem, ItemData *>::iterator filteredIt = m_filteredItems.begin();
     const QHash<KFileItem, ItemData *>::iterator filteredEnd = m_filteredItems.end();
     while (filteredIt != filteredEnd) {
         (*filteredIt)->values.clear();
         ++filteredIt;
     }
 }
 
 QSet<QByteArray> KFileItemModel::roles() const
 {
     return m_roles;
 }
 
 bool KFileItemModel::setExpanded(int index, bool expanded)
 {
     if (!isExpandable(index) || isExpanded(index) == expanded) {
         return false;
     }
 
     QHash<QByteArray, QVariant> values;
     values.insert(sharedValue("isExpanded"), expanded);
     if (!setData(index, values)) {
         return false;
     }
 
     const KFileItem item = m_itemData.at(index)->item;
     const QUrl url = item.url();
     const QUrl targetUrl = item.targetUrl();
     if (expanded) {
         m_expandedDirs.insert(targetUrl, url);
         m_dirLister->openUrl(url, KDirLister::Keep);
 
         const QVariantList previouslyExpandedChildren = m_itemData.at(index)->values.value("previouslyExpandedChildren").value<QVariantList>();
         for (const QVariant &var : previouslyExpandedChildren) {
             m_urlsToExpand.insert(var.toUrl());
         }
     } else {
         // Note that there might be (indirect) children of the folder which is to be collapsed in
         // m_pendingItemsToInsert. To prevent that they will be inserted into the model later,
         // possibly without a parent, which might result in a crash, we insert all pending items
         // right now. All new items which would be without a parent will then be removed.
         dispatchPendingItemsToInsert();
 
         // Check if the index of the collapsed folder has changed. If that is the case, then items
         // were inserted before the collapsed folder, and its index needs to be updated.
         if (m_itemData.at(index)->item != item) {
             index = this->index(item);
         }
 
         m_expandedDirs.remove(targetUrl);
         m_dirLister->stop(url);
         m_dirLister->forgetDirs(url);
 
         const int parentLevel = expandedParentsCount(index);
         const int itemCount = m_itemData.count();
         const int firstChildIndex = index + 1;
 
         QVariantList expandedChildren;
 
         int childIndex = firstChildIndex;
         while (childIndex < itemCount && expandedParentsCount(childIndex) > parentLevel) {
             ItemData *itemData = m_itemData.at(childIndex);
             if (itemData->values.value("isExpanded").toBool()) {
                 const QUrl targetUrl = itemData->item.targetUrl();
                 const QUrl url = itemData->item.url();
                 m_expandedDirs.remove(targetUrl);
                 m_dirLister->stop(url); // TODO: try to unit-test this, see https://bugs.kde.org/show_bug.cgi?id=332102#c11
                 m_dirLister->forgetDirs(url);
                 expandedChildren.append(targetUrl);
             }
             ++childIndex;
         }
         const int childrenCount = childIndex - firstChildIndex;
 
         removeFilteredChildren(KItemRangeList() << KItemRange(index, 1 + childrenCount));
         removeItems(KItemRangeList() << KItemRange(firstChildIndex, childrenCount), DeleteItemData);
 
         m_itemData.at(index)->values.insert("previouslyExpandedChildren", expandedChildren);
     }
 
     return true;
 }
 
 bool KFileItemModel::isExpanded(int index) const
 {
     if (index >= 0 && index < count()) {
         return m_itemData.at(index)->values.value("isExpanded").toBool();
     }
     return false;
 }
 
 bool KFileItemModel::isExpandable(int index) const
 {
     if (index >= 0 && index < count()) {
         // Call data (instead of accessing m_itemData directly)
         // to ensure that the value is initialized.
         return data(index).value("isExpandable").toBool();
     }
     return false;
 }
 
 int KFileItemModel::expandedParentsCount(int index) const
 {
     if (index >= 0 && index < count()) {
         return expandedParentsCount(m_itemData.at(index));
     }
     return 0;
 }
 
 QSet<QUrl> KFileItemModel::expandedDirectories() const
 {
     QSet<QUrl> result;
     const auto dirs = m_expandedDirs;
     for (const auto &dir : dirs) {
         result.insert(dir);
     }
     return result;
 }
 
 void KFileItemModel::restoreExpandedDirectories(const QSet<QUrl> &urls)
 {
     m_urlsToExpand = urls;
 }
 
 void KFileItemModel::expandParentDirectories(const QUrl &url)
 {
     // Assure that each sub-path of the URL that should be
     // expanded is added to m_urlsToExpand. KDirLister
     // does not care whether the parent-URL has already been
     // expanded.
     QUrl urlToExpand = m_dirLister->url();
     const int pos = urlToExpand.path().length();
 
     // first subdir can be empty, if m_dirLister->url().path() does not end with '/'
     // this happens if baseUrl is not root but a home directory, see FoldersPanel,
     // so using QString::SkipEmptyParts
     const QStringList subDirs = url.path().mid(pos).split(QDir::separator(), Qt::SkipEmptyParts);
     for (int i = 0; i < subDirs.count() - 1; ++i) {
         QString path = urlToExpand.path();
         if (!path.endsWith(QLatin1Char('/'))) {
             path.append(QLatin1Char('/'));
         }
         urlToExpand.setPath(path + subDirs.at(i));
         m_urlsToExpand.insert(urlToExpand);
     }
 
     // KDirLister::open() must called at least once to trigger an initial
     // loading. The pending URLs that must be restored are handled
     // in slotCompleted().
     QSetIterator<QUrl> it2(m_urlsToExpand);
     while (it2.hasNext()) {
         const int idx = index(it2.next());
         if (idx >= 0 && !isExpanded(idx)) {
             setExpanded(idx, true);
             break;
         }
     }
 }
 
 void KFileItemModel::setNameFilter(const QString &nameFilter)
 {
     if (m_filter.pattern() != nameFilter) {
         dispatchPendingItemsToInsert();
         m_filter.setPattern(nameFilter);
         applyFilters();
     }
 }
 
 QString KFileItemModel::nameFilter() const
 {
     return m_filter.pattern();
 }
 
 void KFileItemModel::setMimeTypeFilters(const QStringList &filters)
 {
     if (m_filter.mimeTypes() != filters) {
         dispatchPendingItemsToInsert();
         m_filter.setMimeTypes(filters);
         applyFilters();
     }
 }
 
 QStringList KFileItemModel::mimeTypeFilters() const
 {
     return m_filter.mimeTypes();
 }
 
 void KFileItemModel::setExcludeMimeTypeFilter(const QStringList &filters)
 {
     if (m_filter.excludeMimeTypes() != filters) {
         dispatchPendingItemsToInsert();
         m_filter.setExcludeMimeTypes(filters);
         applyFilters();
     }
 }
 
 QStringList KFileItemModel::excludeMimeTypeFilter() const
 {
     return m_filter.excludeMimeTypes();
 }
 
 void KFileItemModel::applyFilters()
 {
     // ===STEP 1===
     // Check which previously shown items from m_itemData must now get
     // hidden and hence moved from m_itemData into m_filteredItems.
 
     QList<int> newFilteredIndexes; // This structure is good for prepending. We will want an ascending sorted Container at the end, this will do fine.
 
     // This pointer will refer to the next confirmed shown item from the point of
     // view of the current "itemData" in the upcoming "for" loop.
     ItemData *itemShownBelow = nullptr;
 
     // We will iterate backwards because it's convenient to know beforehand if the item just below is its child or not.
     for (int index = m_itemData.count() - 1; index >= 0; --index) {
         ItemData *itemData = m_itemData.at(index);
 
         if (m_filter.matches(itemData->item) || (itemShownBelow && itemShownBelow->parent == itemData)) {
             // We could've entered here for two reasons:
             // 1. This item passes the filter itself
             // 2. This is an expanded folder that doesn't pass the filter but sees a filter-passing child just below
 
             // So this item must remain shown.
             // Lets register this item as the next shown item from the point of view of the next iteration of this for loop
             itemShownBelow = itemData;
         } else {
             // We hide this item for now, however, for expanded folders this is not final:
             // if after the next "for" loop we discover that its children must now be shown with the newly applied fliter, we shall re-insert it
             newFilteredIndexes.prepend(index);
             m_filteredItems.insert(itemData->item, itemData);
             // indexShownBelow doesn't get updated since this item will be hidden
         }
     }
 
     // This will remove the newly filtered items from m_itemData
     removeItems(KItemRangeList::fromSortedContainer(newFilteredIndexes), KeepItemData);
 
     // ===STEP 2===
     // Check which hidden items from m_filteredItems should
     // become visible again and hence moved from m_filteredItems back into m_itemData.
 
     QList<ItemData *> newVisibleItems;
 
     QHash<KFileItem, ItemData *> ancestorsOfNewVisibleItems; // We will make sure these also become visible in step 3.
 
     QHash<KFileItem, ItemData *>::iterator it = m_filteredItems.begin();
     while (it != m_filteredItems.end()) {
         if (m_filter.matches(it.key())) {
             newVisibleItems.append(it.value());
 
             // If this is a child of an expanded folder, we must make sure that its whole parental chain will also be shown.
             // We will go up through its parental chain until we either:
             // 1 - reach the "root item" of the current view, i.e the currently opened folder on Dolphin. Their children have their ItemData::parent set to
             // nullptr. or 2 - we reach an unfiltered parent or a previously discovered ancestor.
             for (ItemData *parent = it.value()->parent; parent && !ancestorsOfNewVisibleItems.contains(parent->item) && m_filteredItems.contains(parent->item);
                  parent = parent->parent) {
                 // We wish we could remove this parent from m_filteredItems right now, but we are iterating over it
                 // and it would mess up the iteration. We will mark it to be removed in step 3.
                 ancestorsOfNewVisibleItems.insert(parent->item, parent);
             }
 
             it = m_filteredItems.erase(it);
         } else {
             // Item remains filtered for now
             // However, for expanded folders this is not final, we may discover later that it has unfiltered descendants.
             ++it;
         }
     }
 
     // ===STEP 3===
     // Handles the ancestorsOfNewVisibleItems.
     // Now that we are done iterating through m_filteredItems we can safely move the ancestorsOfNewVisibleItems from m_filteredItems to newVisibleItems.
     for (it = ancestorsOfNewVisibleItems.begin(); it != ancestorsOfNewVisibleItems.end(); it++) {
         if (m_filteredItems.remove(it.key())) {
             // m_filteredItems still contained this ancestor until now so we can be sure that we aren't adding a duplicate ancestor to newVisibleItems.
             newVisibleItems.append(it.value());
         }
     }
 
     // This will insert the newly discovered unfiltered items into m_itemData
     insertItems(newVisibleItems);
 }
 
 void KFileItemModel::removeFilteredChildren(const KItemRangeList &itemRanges)
 {
     if (m_filteredItems.isEmpty() || !m_requestRole[ExpandedParentsCountRole]) {
         // There are either no filtered items, or it is not possible to expand
         // folders -> there cannot be any filtered children.
         return;
     }
 
     QSet<ItemData *> parents;
     for (const KItemRange &range : itemRanges) {
         for (int index = range.index; index < range.index + range.count; ++index) {
             parents.insert(m_itemData.at(index));
         }
     }
 
     QHash<KFileItem, ItemData *>::iterator it = m_filteredItems.begin();
     while (it != m_filteredItems.end()) {
         if (parents.contains(it.value()->parent)) {
             delete it.value();
             it = m_filteredItems.erase(it);
         } else {
             ++it;
         }
     }
 }
 
 QList<KFileItemModel::RoleInfo> KFileItemModel::rolesInformation()
 {
     static QList<RoleInfo> rolesInfo;
     if (rolesInfo.isEmpty()) {
         int count = 0;
         const RoleInfoMap *map = rolesInfoMap(count);
         for (int i = 0; i < count; ++i) {
             if (map[i].roleType != NoRole) {
                 RoleInfo info;
                 info.role = map[i].role;
                 info.translation = map[i].roleTranslation.toString();
                 if (!map[i].groupTranslation.isEmpty()) {
                     info.group = map[i].groupTranslation.toString();
                 } else {
                     // For top level roles, groupTranslation is 0. We must make sure that
                     // info.group is an empty string then because the code that generates
                     // menus tries to put the actions into sub menus otherwise.
                     info.group = QString();
                 }
                 info.requiresBaloo = map[i].requiresBaloo;
                 info.requiresIndexer = map[i].requiresIndexer;
                 if (!map[i].tooltipTranslation.isEmpty()) {
                     info.tooltip = map[i].tooltipTranslation.toString();
                 } else {
                     info.tooltip = QString();
                 }
                 rolesInfo.append(info);
             }
         }
     }
 
     return rolesInfo;
 }
 
 void KFileItemModel::onGroupedSortingChanged(bool current)
 {
     Q_UNUSED(current)
     m_groups.clear();
 }
 
 void KFileItemModel::onSortRoleChanged(const QByteArray &current, const QByteArray &previous, bool resortItems)
 {
     Q_UNUSED(previous)
     m_sortRole = typeForRole(current);
 
     if (!m_requestRole[m_sortRole]) {
         QSet<QByteArray> newRoles = m_roles;
         newRoles << current;
         setRoles(newRoles);
     }
 
     if (resortItems) {
         resortAllItems();
     }
 }
 
 void KFileItemModel::onSortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous)
 {
     Q_UNUSED(current)
     Q_UNUSED(previous)
     resortAllItems();
 }
 
 void KFileItemModel::loadSortingSettings()
 {
     using Choice = GeneralSettings::EnumSortingChoice;
     switch (GeneralSettings::sortingChoice()) {
     case Choice::NaturalSorting:
         m_naturalSorting = true;
         m_collator.setCaseSensitivity(Qt::CaseInsensitive);
         break;
     case Choice::CaseSensitiveSorting:
         m_naturalSorting = false;
         m_collator.setCaseSensitivity(Qt::CaseSensitive);
         break;
     case Choice::CaseInsensitiveSorting:
         m_naturalSorting = false;
         m_collator.setCaseSensitivity(Qt::CaseInsensitive);
         break;
     default:
         Q_UNREACHABLE();
     }
     // Workaround for bug https://bugreports.qt.io/browse/QTBUG-69361
     // Force the clean state of QCollator in single thread to avoid thread safety problems in sort
     m_collator.compare(QString(), QString());
 }
 
 void KFileItemModel::resortAllItems()
 {
     m_resortAllItemsTimer->stop();
 
     const int itemCount = count();
     if (itemCount <= 0) {
         return;
     }
 
 #ifdef KFILEITEMMODEL_DEBUG
     QElapsedTimer timer;
     timer.start();
     qCDebug(DolphinDebug) << "===========================================================";
     qCDebug(DolphinDebug) << "Resorting" << itemCount << "items";
 #endif
 
     // Remember the order of the current URLs so
     // that it can be determined which indexes have
     // been moved because of the resorting.
     QList<QUrl> oldUrls;
     oldUrls.reserve(itemCount);
     for (const ItemData *itemData : std::as_const(m_itemData)) {
         oldUrls.append(itemData->item.url());
     }
 
     m_items.clear();
     m_items.reserve(itemCount);
 
     // Resort the items
     sort(m_itemData.begin(), m_itemData.end());
     for (int i = 0; i < itemCount; ++i) {
         m_items.insert(m_itemData.at(i)->item.url(), i);
     }
 
     // Determine the first index that has been moved.
     int firstMovedIndex = 0;
     while (firstMovedIndex < itemCount && firstMovedIndex == m_items.value(oldUrls.at(firstMovedIndex))) {
         ++firstMovedIndex;
     }
 
     const bool itemsHaveMoved = firstMovedIndex < itemCount;
     if (itemsHaveMoved) {
         m_groups.clear();
 
         int lastMovedIndex = itemCount - 1;
         while (lastMovedIndex > firstMovedIndex && lastMovedIndex == m_items.value(oldUrls.at(lastMovedIndex))) {
             --lastMovedIndex;
         }
 
         Q_ASSERT(firstMovedIndex <= lastMovedIndex);
 
         // Create a list movedToIndexes, which has the property that
         // movedToIndexes[i] is the new index of the item with the old index
         // firstMovedIndex + i.
         const int movedItemsCount = lastMovedIndex - firstMovedIndex + 1;
         QList<int> movedToIndexes;
         movedToIndexes.reserve(movedItemsCount);
         for (int i = firstMovedIndex; i <= lastMovedIndex; ++i) {
             const int newIndex = m_items.value(oldUrls.at(i));
             movedToIndexes.append(newIndex);
         }
 
         Q_EMIT itemsMoved(KItemRange(firstMovedIndex, movedItemsCount), movedToIndexes);
     } else if (groupedSorting()) {
         // The groups might have changed even if the order of the items has not.
         const QList<QPair<int, QVariant>> oldGroups = m_groups;
         m_groups.clear();
         if (groups() != oldGroups) {
             Q_EMIT groupsChanged();
         }
     }
 
 #ifdef KFILEITEMMODEL_DEBUG
     qCDebug(DolphinDebug) << "[TIME] Resorting of" << itemCount << "items:" << timer.elapsed();
 #endif
 }
 
 void KFileItemModel::slotCompleted()
 {
     m_maximumUpdateIntervalTimer->stop();
     dispatchPendingItemsToInsert();
 
     if (!m_urlsToExpand.isEmpty()) {
         // Try to find a URL that can be expanded.
         // Note that the parent folder must be expanded before any of its subfolders become visible.
         // Therefore, some URLs in m_restoredExpandedUrls might not be visible yet
         // -> we expand the first visible URL we find in m_restoredExpandedUrls.
         // Iterate over a const copy because items are deleted and inserted within the loop
         const auto urlsToExpand = m_urlsToExpand;
         for (const QUrl &url : urlsToExpand) {
             const int indexForUrl = index(url);
             if (indexForUrl >= 0) {
                 m_urlsToExpand.remove(url);
                 if (setExpanded(indexForUrl, true)) {
                     // The dir lister has been triggered. This slot will be called
                     // again after the directory has been expanded.
                     return;
                 }
             }
         }
 
         // None of the URLs in m_restoredExpandedUrls could be found in the model. This can happen
         // if these URLs have been deleted in the meantime.
         m_urlsToExpand.clear();
     }
 
     Q_EMIT directoryLoadingCompleted();
 }
 
 void KFileItemModel::slotCanceled()
 {
     m_maximumUpdateIntervalTimer->stop();
     dispatchPendingItemsToInsert();
 
     Q_EMIT directoryLoadingCanceled();
 }
 
 void KFileItemModel::slotItemsAdded(const QUrl &directoryUrl, const KFileItemList &items)
 {
     Q_ASSERT(!items.isEmpty());
 
     const QUrl parentUrl = m_expandedDirs.value(directoryUrl, directoryUrl.adjusted(QUrl::StripTrailingSlash));
 
     if (m_requestRole[ExpandedParentsCountRole]) {
         // If the expanding of items is enabled, the call
         // dirLister->openUrl(url, KDirLister::Keep) in KFileItemModel::setExpanded()
         // might result in emitting the same items twice due to the Keep-parameter.
         // This case happens if an item gets expanded, collapsed and expanded again
         // before the items could be loaded for the first expansion.
         if (index(items.first().url()) >= 0) {
             // The items are already part of the model.
             return;
         }
 
         if (directoryUrl != directory()) {
             // To be able to compare whether the new items may be inserted as children
             // of a parent item the pending items must be added to the model first.
             dispatchPendingItemsToInsert();
         }
 
         // KDirLister keeps the children of items that got expanded once even if
         // they got collapsed again with KFileItemModel::setExpanded(false). So it must be
         // checked whether the parent for new items is still expanded.
         const int parentIndex = index(parentUrl);
         if (parentIndex >= 0 && !m_itemData[parentIndex]->values.value("isExpanded").toBool()) {
             // The parent is not expanded.
             return;
         }
     }
 
     const QList<ItemData *> itemDataList = createItemDataList(parentUrl, items);
 
     if (!m_filter.hasSetFilters()) {
         m_pendingItemsToInsert.append(itemDataList);
     } else {
         QSet<ItemData *> parentsToEnsureVisible;
 
         // The name or type filter is active. Hide filtered items
         // before inserting them into the model and remember
         // the filtered items in m_filteredItems.
         for (ItemData *itemData : itemDataList) {
             if (m_filter.matches(itemData->item)) {
                 m_pendingItemsToInsert.append(itemData);
                 if (itemData->parent) {
                     parentsToEnsureVisible.insert(itemData->parent);
                 }
             } else {
                 m_filteredItems.insert(itemData->item, itemData);
             }
         }
 
         // Entire parental chains must be shown
         for (ItemData *parent : parentsToEnsureVisible) {
             for (; parent && m_filteredItems.remove(parent->item); parent = parent->parent) {
                 m_pendingItemsToInsert.append(parent);
             }
         }
     }
 
     if (!m_maximumUpdateIntervalTimer->isActive()) {
         // Assure that items get dispatched if no completed() or canceled() signal is
         // emitted during the maximum update interval.
         m_maximumUpdateIntervalTimer->start();
     }
 
     Q_EMIT fileItemsChanged({KFileItem(directoryUrl)});
 }
 
 int KFileItemModel::filterChildlessParents(KItemRangeList &removedItemRanges, const QSet<ItemData *> &parentsToEnsureVisible)
 {
     int filteredParentsCount = 0;
     // The childless parents not yet removed will always be right above the start of a removed range.
     // We iterate backwards to ensure the deepest folders are processed before their parents
     for (int i = removedItemRanges.size() - 1; i >= 0; i--) {
         KItemRange itemRange = removedItemRanges.at(i);
         const ItemData *const firstInRange = m_itemData.at(itemRange.index);
         ItemData *itemAbove = itemRange.index - 1 >= 0 ? m_itemData.at(itemRange.index - 1) : nullptr;
         const ItemData *const itemBelow = itemRange.index + itemRange.count < m_itemData.count() ? m_itemData.at(itemRange.index + itemRange.count) : nullptr;
 
         if (itemAbove && firstInRange->parent == itemAbove && !m_filter.matches(itemAbove->item) && (!itemBelow || itemBelow->parent != itemAbove)
             && !parentsToEnsureVisible.contains(itemAbove)) {
             // The item above exists, is the parent, doesn't pass the filter, does not belong to parentsToEnsureVisible
             // and this deleted range covers all of its descendents, so none will be left.
             m_filteredItems.insert(itemAbove->item, itemAbove);
             // This range's starting index will be extended to include the parent above:
             --itemRange.index;
             ++itemRange.count;
             ++filteredParentsCount;
             KItemRange previousRange = i > 0 ? removedItemRanges.at(i - 1) : KItemRange();
             // We must check if this caused the range to touch the previous range, if that's the case they shall be merged
             if (i > 0 && previousRange.index + previousRange.count == itemRange.index) {
                 previousRange.count += itemRange.count;
                 removedItemRanges.replace(i - 1, previousRange);
                 removedItemRanges.removeAt(i);
             } else {
                 removedItemRanges.replace(i, itemRange);
                 // We must revisit this range in the next iteration since its starting index changed
                 ++i;
             }
         }
     }
     return filteredParentsCount;
 }
 
 void KFileItemModel::slotItemsDeleted(const KFileItemList &items)
 {
     dispatchPendingItemsToInsert();
 
     QVector<int> indexesToRemove;
     indexesToRemove.reserve(items.count());
     KFileItemList dirsChanged;
 
     const auto currentDir = directory();
 
     for (const KFileItem &item : items) {
         if (item.url() == currentDir) {
             Q_EMIT currentDirectoryRemoved();
             return;
         }
 
         const int indexForItem = index(item);
         if (indexForItem >= 0) {
             indexesToRemove.append(indexForItem);
         } else {
             // Probably the item has been filtered.
             QHash<KFileItem, ItemData *>::iterator it = m_filteredItems.find(item);
             if (it != m_filteredItems.end()) {
                 delete it.value();
                 m_filteredItems.erase(it);
             }
         }
 
         QUrl parentUrl = item.url().adjusted(QUrl::RemoveFilename | QUrl::StripTrailingSlash);
         if (dirsChanged.findByUrl(parentUrl).isNull()) {
             dirsChanged << KFileItem(parentUrl);
         }
     }
 
     std::sort(indexesToRemove.begin(), indexesToRemove.end());
 
     if (m_requestRole[ExpandedParentsCountRole] && !m_expandedDirs.isEmpty()) {
         // Assure that removing a parent item also results in removing all children
         QVector<int> indexesToRemoveWithChildren;
         indexesToRemoveWithChildren.reserve(m_itemData.count());
 
         const int itemCount = m_itemData.count();
         for (int index : std::as_const(indexesToRemove)) {
             indexesToRemoveWithChildren.append(index);
 
             const int parentLevel = expandedParentsCount(index);
             int childIndex = index + 1;
             while (childIndex < itemCount && expandedParentsCount(childIndex) > parentLevel) {
                 indexesToRemoveWithChildren.append(childIndex);
                 ++childIndex;
             }
         }
 
         indexesToRemove = indexesToRemoveWithChildren;
     }
 
     KItemRangeList itemRanges = KItemRangeList::fromSortedContainer(indexesToRemove);
     removeFilteredChildren(itemRanges);
 
     // This call will update itemRanges to include the childless parents that have been filtered.
     const int filteredParentsCount = filterChildlessParents(itemRanges);
 
     // If any childless parents were filtered, then itemRanges got updated and now contains items that were really deleted
     // mixed with expanded folders that are just being filtered out.
     // If that's the case, we pass 'DeleteItemDataIfUnfiltered' as a hint
     // so removeItems() will check m_filteredItems to differentiate which is which.
     removeItems(itemRanges, filteredParentsCount > 0 ? DeleteItemDataIfUnfiltered : DeleteItemData);
 
     Q_EMIT fileItemsChanged(dirsChanged);
 }
 
 void KFileItemModel::slotRefreshItems(const QList<QPair<KFileItem, KFileItem>> &items)
 {
     Q_ASSERT(!items.isEmpty());
 #ifdef KFILEITEMMODEL_DEBUG
     qCDebug(DolphinDebug) << "Refreshing" << items.count() << "items";
 #endif
 
     // Get the indexes of all items that have been refreshed
     QList<int> indexes;
     indexes.reserve(items.count());
 
     QSet<QByteArray> changedRoles;
     KFileItemList changedFiles;
 
     // Contains the indexes of the currently visible items
     // that should get hidden and hence moved to m_filteredItems.
     QVector<int> newFilteredIndexes;
 
     // Contains currently hidden items that should
     // get visible and hence removed from m_filteredItems
     QList<ItemData *> newVisibleItems;
 
     QListIterator<QPair<KFileItem, KFileItem>> it(items);
 
     while (it.hasNext()) {
         const QPair<KFileItem, KFileItem> &itemPair = it.next();
         const KFileItem &oldItem = itemPair.first;
         const KFileItem &newItem = itemPair.second;
         const int indexForItem = index(oldItem);
         const bool newItemMatchesFilter = m_filter.matches(newItem);
         if (indexForItem >= 0) {
             m_itemData[indexForItem]->item = newItem;
 
             // Keep old values as long as possible if they could not retrieved synchronously yet.
             // The update of the values will be done asynchronously by KFileItemModelRolesUpdater.
             ItemData *const itemData = m_itemData.at(indexForItem);
             QHashIterator<QByteArray, QVariant> it(retrieveData(newItem, itemData->parent));
             while (it.hasNext()) {
                 it.next();
                 const QByteArray &role = it.key();
                 if (itemData->values.value(role) != it.value()) {
                     itemData->values.insert(role, it.value());
                     changedRoles.insert(role);
                 }
             }
 
             m_items.remove(oldItem.url());
             // We must maintain m_items consistent with m_itemData for now, this very loop is using it.
             // We leave it to be cleared by removeItems() later, when m_itemData actually gets updated.
             m_items.insert(newItem.url(), indexForItem);
             if (newItemMatchesFilter
                 || (itemData->values.value("isExpanded").toBool()
                     && (indexForItem + 1 < m_itemData.count() && m_itemData.at(indexForItem + 1)->parent == itemData))) {
                 // We are lenient with expanded folders that originally had visible children.
                 // If they become childless now they will be caught by filterChildlessParents()
                 changedFiles.append(newItem);
                 indexes.append(indexForItem);
             } else {
                 newFilteredIndexes.append(indexForItem);
                 m_filteredItems.insert(newItem, itemData);
             }
         } else {
             // Check if 'oldItem' is one of the filtered items.
             QHash<KFileItem, ItemData *>::iterator it = m_filteredItems.find(oldItem);
             if (it != m_filteredItems.end()) {
                 ItemData *const itemData = it.value();
                 itemData->item = newItem;
 
                 // The data stored in 'values' might have changed. Therefore, we clear
                 // 'values' and re-populate it the next time it is requested via data(int).
                 // Before clearing, we must remember if it was expanded and the expanded parents count,
                 // otherwise these states would be lost. The data() method will deal with this special case.
                 const bool isExpanded = itemData->values.value("isExpanded").toBool();
                 bool hasExpandedParentsCount = false;
                 const int expandedParentsCount = itemData->values.value("expandedParentsCount").toInt(&hasExpandedParentsCount);
                 itemData->values.clear();
                 if (isExpanded) {
                     itemData->values.insert("isExpanded", true);
                     if (hasExpandedParentsCount) {
                         itemData->values.insert("expandedParentsCount", expandedParentsCount);
                     }
                 }
 
                 m_filteredItems.erase(it);
                 if (newItemMatchesFilter) {
                     newVisibleItems.append(itemData);
                 } else {
                     m_filteredItems.insert(newItem, itemData);
                 }
             }
         }
     }
 
     std::sort(newFilteredIndexes.begin(), newFilteredIndexes.end());
 
     // We must keep track of parents of new visible items since they must be shown no matter what
     // They will be considered "immune" to filterChildlessParents()
     QSet<ItemData *> parentsToEnsureVisible;
 
     for (ItemData *item : newVisibleItems) {
         for (ItemData *parent = item->parent; parent && !parentsToEnsureVisible.contains(parent); parent = parent->parent) {
             parentsToEnsureVisible.insert(parent);
         }
     }
     for (ItemData *parent : parentsToEnsureVisible) {
         // We make sure they are all unfiltered.
         if (m_filteredItems.remove(parent->item)) {
             // If it is being unfiltered now, we mark it to be inserted by appending it to newVisibleItems
             newVisibleItems.append(parent);
             // It could be in newFilteredIndexes, we must remove it if it's there:
             const int parentIndex = index(parent->item);
             if (parentIndex >= 0) {
                 QVector<int>::iterator it = std::lower_bound(newFilteredIndexes.begin(), newFilteredIndexes.end(), parentIndex);
                 if (it != newFilteredIndexes.end() && *it == parentIndex) {
                     newFilteredIndexes.erase(it);
                 }
             }
         }
     }
 
     KItemRangeList removedRanges = KItemRangeList::fromSortedContainer(newFilteredIndexes);
 
     // This call will update itemRanges to include the childless parents that have been filtered.
     filterChildlessParents(removedRanges, parentsToEnsureVisible);
 
     removeItems(removedRanges, KeepItemData);
 
     // Show previously hidden items that should get visible
     insertItems(newVisibleItems);
 
     // Final step: we will emit 'itemsChanged' and 'fileItemsChanged' signals and trigger the asynchronous re-sorting logic.
 
     // If the changed items have been created recently, they might not be in m_items yet.
     // In that case, the list 'indexes' might be empty.
     if (indexes.isEmpty()) {
         return;
     }
 
     if (newVisibleItems.count() > 0 || removedRanges.count() > 0) {
         // The original indexes have changed and are now worthless since items were removed and/or inserted.
         indexes.clear();
         // m_items is not yet rebuilt at this point, so we use our own means to resolve the new indexes.
         const QSet<const KFileItem> changedFilesSet(changedFiles.cbegin(), changedFiles.cend());
         for (int i = 0; i < m_itemData.count(); i++) {
             if (changedFilesSet.contains(m_itemData.at(i)->item)) {
                 indexes.append(i);
             }
         }
     } else {
         std::sort(indexes.begin(), indexes.end());
     }
 
     // Extract the item-ranges out of the changed indexes
     const KItemRangeList itemRangeList = KItemRangeList::fromSortedContainer(indexes);
     emitItemsChangedAndTriggerResorting(itemRangeList, changedRoles);
 
     Q_EMIT fileItemsChanged(changedFiles);
 }
 
 void KFileItemModel::slotClear()
 {
 #ifdef KFILEITEMMODEL_DEBUG
     qCDebug(DolphinDebug) << "Clearing all items";
 #endif
 
     qDeleteAll(m_filteredItems);
     m_filteredItems.clear();
     m_groups.clear();
 
     m_maximumUpdateIntervalTimer->stop();
     m_resortAllItemsTimer->stop();
 
     qDeleteAll(m_pendingItemsToInsert);
     m_pendingItemsToInsert.clear();
 
     const int removedCount = m_itemData.count();
     if (removedCount > 0) {
         qDeleteAll(m_itemData);
         m_itemData.clear();
         m_items.clear();
         Q_EMIT itemsRemoved(KItemRangeList() << KItemRange(0, removedCount));
     }
 
     m_expandedDirs.clear();
 }
 
 void KFileItemModel::slotSortingChoiceChanged()
 {
     loadSortingSettings();
     resortAllItems();
 }
 
 void KFileItemModel::dispatchPendingItemsToInsert()
 {
     if (!m_pendingItemsToInsert.isEmpty()) {
         insertItems(m_pendingItemsToInsert);
         m_pendingItemsToInsert.clear();
     }
 }
 
 void KFileItemModel::insertItems(QList<ItemData *> &newItems)
 {
     if (newItems.isEmpty()) {
         return;
     }
 
 #ifdef KFILEITEMMODEL_DEBUG
     QElapsedTimer timer;
     timer.start();
     qCDebug(DolphinDebug) << "===========================================================";
     qCDebug(DolphinDebug) << "Inserting" << newItems.count() << "items";
 #endif
 
     m_groups.clear();
     prepareItemsForSorting(newItems);
 
     // Natural sorting of items can be very slow. However, it becomes much faster
     // if the input sequence is already mostly sorted. Therefore, we first sort
     // 'newItems' according to the QStrings using QString::operator<(), which is quite fast.
     if (m_naturalSorting) {
         if (m_sortRole == NameRole) {
             parallelMergeSort(newItems.begin(), newItems.end(), nameLessThan, QThread::idealThreadCount());
         } else if (isRoleValueNatural(m_sortRole)) {
             auto lambdaLessThan = [&](const KFileItemModel::ItemData *a, const KFileItemModel::ItemData *b) {
                 const QByteArray role = roleForType(m_sortRole);
                 return a->values.value(role).toString() < b->values.value(role).toString();
             };
             parallelMergeSort(newItems.begin(), newItems.end(), lambdaLessThan, QThread::idealThreadCount());
         }
     }
 
     sort(newItems.begin(), newItems.end());
 
 #ifdef KFILEITEMMODEL_DEBUG
     qCDebug(DolphinDebug) << "[TIME] Sorting:" << timer.elapsed();
 #endif
 
     KItemRangeList itemRanges;
     const int existingItemCount = m_itemData.count();
     const int newItemCount = newItems.count();
     const int totalItemCount = existingItemCount + newItemCount;
 
     if (existingItemCount == 0) {
         // Optimization for the common special case that there are no
         // items in the model yet. Happens, e.g., when entering a folder.
         m_itemData = newItems;
         itemRanges << KItemRange(0, newItemCount);
     } else {
         m_itemData.reserve(totalItemCount);
         for (int i = existingItemCount; i < totalItemCount; ++i) {
             m_itemData.append(nullptr);
         }
 
         // We build the new list m_itemData in reverse order to minimize
         // the number of moves and guarantee O(N) complexity.
         int targetIndex = totalItemCount - 1;
         int sourceIndexExistingItems = existingItemCount - 1;
         int sourceIndexNewItems = newItemCount - 1;
 
         int rangeCount = 0;
 
         while (sourceIndexNewItems >= 0) {
             ItemData *newItem = newItems.at(sourceIndexNewItems);
             if (sourceIndexExistingItems >= 0 && lessThan(newItem, m_itemData.at(sourceIndexExistingItems), m_collator)) {
                 // Move an existing item to its new position. If any new items
                 // are behind it, push the item range to itemRanges.
                 if (rangeCount > 0) {
                     itemRanges << KItemRange(sourceIndexExistingItems + 1, rangeCount);
                     rangeCount = 0;
                 }
 
                 m_itemData[targetIndex] = m_itemData.at(sourceIndexExistingItems);
                 --sourceIndexExistingItems;
             } else {
                 // Insert a new item into the list.
                 ++rangeCount;
                 m_itemData[targetIndex] = newItem;
                 --sourceIndexNewItems;
             }
             --targetIndex;
         }
 
         // Push the final item range to itemRanges.
         if (rangeCount > 0) {
             itemRanges << KItemRange(sourceIndexExistingItems + 1, rangeCount);
         }
 
         // Note that itemRanges is still sorted in reverse order.
         std::reverse(itemRanges.begin(), itemRanges.end());
     }
 
     // The indexes in m_items are not correct anymore. Therefore, we clear m_items.
     // It will be re-populated with the updated indices if index(const QUrl&) is called.
     m_items.clear();
 
     Q_EMIT itemsInserted(itemRanges);
 
 #ifdef KFILEITEMMODEL_DEBUG
     qCDebug(DolphinDebug) << "[TIME] Inserting of" << newItems.count() << "items:" << timer.elapsed();
 #endif
 }
 
 void KFileItemModel::removeItems(const KItemRangeList &itemRanges, RemoveItemsBehavior behavior)
 {
     if (itemRanges.isEmpty()) {
         return;
     }
 
     m_groups.clear();
 
     // Step 1: Remove the items from m_itemData, and free the ItemData.
     int removedItemsCount = 0;
     for (const KItemRange &range : itemRanges) {
         removedItemsCount += range.count;
 
         for (int index = range.index; index < range.index + range.count; ++index) {
             if (behavior == DeleteItemData || (behavior == DeleteItemDataIfUnfiltered && !m_filteredItems.contains(m_itemData.at(index)->item))) {
                 delete m_itemData.at(index);
             }
 
             m_itemData[index] = nullptr;
         }
     }
 
     // Step 2: Remove the ItemData pointers from the list m_itemData.
     int target = itemRanges.at(0).index;
     int source = itemRanges.at(0).index + itemRanges.at(0).count;
     int nextRange = 1;
 
     const int oldItemDataCount = m_itemData.count();
     while (source < oldItemDataCount) {
         m_itemData[target] = m_itemData[source];
         ++target;
         ++source;
 
         if (nextRange < itemRanges.count() && source == itemRanges.at(nextRange).index) {
             // Skip the items in the next removed range.
             source += itemRanges.at(nextRange).count;
             ++nextRange;
         }
     }
 
     m_itemData.erase(m_itemData.end() - removedItemsCount, m_itemData.end());
 
     // The indexes in m_items are not correct anymore. Therefore, we clear m_items.
     // It will be re-populated with the updated indices if index(const QUrl&) is called.
     m_items.clear();
 
     Q_EMIT itemsRemoved(itemRanges);
 }
 
 QList<KFileItemModel::ItemData *> KFileItemModel::createItemDataList(const QUrl &parentUrl, const KFileItemList &items) const
 {
     if (m_sortRole == TypeRole) {
         // Try to resolve the MIME-types synchronously to prevent a reordering of
         // the items when sorting by type (per default MIME-types are resolved
         // asynchronously by KFileItemModelRolesUpdater).
         determineMimeTypes(items, 200);
     }
 
     // We search for the parent in m_itemData and then in m_filteredItems if necessary
     const int parentIndex = index(parentUrl);
     ItemData *parentItem = parentIndex < 0 ? m_filteredItems.value(KFileItem(parentUrl), nullptr) : m_itemData.at(parentIndex);
 
     QList<ItemData *> itemDataList;
     itemDataList.reserve(items.count());
 
     for (const KFileItem &item : items) {
         ItemData *itemData = new ItemData();
         itemData->item = item;
         itemData->parent = parentItem;
         itemDataList.append(itemData);
     }
 
     return itemDataList;
 }
 
 void KFileItemModel::prepareItemsForSorting(QList<ItemData *> &itemDataList)
 {
     switch (m_sortRole) {
     case ExtensionRole:
     case PermissionsRole:
     case OwnerRole:
     case GroupRole:
     case DestinationRole:
     case PathRole:
     case DeletionTimeRole:
         // These roles can be determined with retrieveData, and they have to be stored
         // in the QHash "values" for the sorting.
         for (ItemData *itemData : std::as_const(itemDataList)) {
             if (itemData->values.isEmpty()) {
                 itemData->values = retrieveData(itemData->item, itemData->parent);
             }
         }
         break;
 
     case TypeRole:
         // At least store the data including the file type for items with known MIME type.
         for (ItemData *itemData : std::as_const(itemDataList)) {
             if (itemData->values.isEmpty()) {
                 const KFileItem item = itemData->item;
                 if (item.isDir() || item.isMimeTypeKnown()) {
                     itemData->values = retrieveData(itemData->item, itemData->parent);
                 }
             }
         }
         break;
 
     default:
         // The other roles are either resolved by KFileItemModelRolesUpdater
         // (this includes the SizeRole for directories), or they do not need
         // to be stored in the QHash "values" for sorting because the data can
         // be retrieved directly from the KFileItem (NameRole, SizeRole for files,
         // DateRole).
         break;
     }
 }
 
 int KFileItemModel::expandedParentsCount(const ItemData *data)
 {
     // The hash 'values' is only guaranteed to contain the key "expandedParentsCount"
     // if the corresponding item is expanded, and it is not a top-level item.
     const ItemData *parent = data->parent;
     if (parent) {
         if (parent->parent) {
             Q_ASSERT(parent->values.contains("expandedParentsCount"));
             return parent->values.value("expandedParentsCount").toInt() + 1;
         } else {
             return 1;
         }
     } else {
         return 0;
     }
 }
 
 void KFileItemModel::removeExpandedItems()
 {
     QVector<int> indexesToRemove;
 
     const int maxIndex = m_itemData.count() - 1;
     for (int i = 0; i <= maxIndex; ++i) {
         const ItemData *itemData = m_itemData.at(i);
         if (itemData->parent) {
             indexesToRemove.append(i);
         }
     }
 
     removeItems(KItemRangeList::fromSortedContainer(indexesToRemove), DeleteItemData);
     m_expandedDirs.clear();
 
     // Also remove all filtered items which have a parent.
     QHash<KFileItem, ItemData *>::iterator it = m_filteredItems.begin();
     const QHash<KFileItem, ItemData *>::iterator end = m_filteredItems.end();
 
     while (it != end) {
         if (it.value()->parent) {
             delete it.value();
             it = m_filteredItems.erase(it);
         } else {
             ++it;
         }
     }
 }
 
 void KFileItemModel::emitItemsChangedAndTriggerResorting(const KItemRangeList &itemRanges, const QSet<QByteArray> &changedRoles)
 {
     Q_EMIT itemsChanged(itemRanges, changedRoles);
 
     // Trigger a resorting if necessary. Note that this can happen even if the sort
     // role has not changed at all because the file name can be used as a fallback.
     if (changedRoles.contains(sortRole()) || changedRoles.contains(roleForType(NameRole))
         || (changedRoles.contains("count") && sortRole() == "size")) { // "count" is used in the "size" sort role, so this might require a resorting.
         for (const KItemRange &range : itemRanges) {
             bool needsResorting = false;
 
             const int first = range.index;
             const int last = range.index + range.count - 1;
 
             // Resorting the model is necessary if
             // (a)  The first item in the range is "lessThan" its predecessor,
             // (b)  the successor of the last item is "lessThan" the last item, or
             // (c)  the internal order of the items in the range is incorrect.
             if (first > 0 && lessThan(m_itemData.at(first), m_itemData.at(first - 1), m_collator)) {
                 needsResorting = true;
             } else if (last < count() - 1 && lessThan(m_itemData.at(last + 1), m_itemData.at(last), m_collator)) {
                 needsResorting = true;
             } else {
                 for (int index = first; index < last; ++index) {
                     if (lessThan(m_itemData.at(index + 1), m_itemData.at(index), m_collator)) {
                         needsResorting = true;
                         break;
                     }
                 }
             }
 
             if (needsResorting) {
                 scheduleResortAllItems();
                 return;
             }
         }
     }
 
     if (groupedSorting() && changedRoles.contains(sortRole())) {
         // The position is still correct, but the groups might have changed
         // if the changed item is either the first or the last item in a
         // group.
         // In principle, we could try to find out if the item really is the
         // first or last one in its group and then update the groups
         // (possibly with a delayed timer to make sure that we don't
         // re-calculate the groups very often if items are updated one by
         // one), but starting m_resortAllItemsTimer is easier.
         m_resortAllItemsTimer->start();
     }
 }
 
 void KFileItemModel::resetRoles()
 {
     for (int i = 0; i < RolesCount; ++i) {
         m_requestRole[i] = false;
     }
 }
 
 KFileItemModel::RoleType KFileItemModel::typeForRole(const QByteArray &role) const
 {
     static QHash<QByteArray, RoleType> roles;
     if (roles.isEmpty()) {
         // Insert user visible roles that can be accessed with
         // KFileItemModel::roleInformation()
         int count = 0;
         const RoleInfoMap *map = rolesInfoMap(count);
         for (int i = 0; i < count; ++i) {
             roles.insert(map[i].role, map[i].roleType);
         }
 
         // Insert internal roles (take care to synchronize the implementation
         // with KFileItemModel::roleForType() in case if a change is done).
         roles.insert("isDir", IsDirRole);
         roles.insert("isLink", IsLinkRole);
         roles.insert("isHidden", IsHiddenRole);
         roles.insert("isExpanded", IsExpandedRole);
         roles.insert("isExpandable", IsExpandableRole);
         roles.insert("expandedParentsCount", ExpandedParentsCountRole);
 
         Q_ASSERT(roles.count() == RolesCount);
     }
 
     return roles.value(role, NoRole);
 }
 
 QByteArray KFileItemModel::roleForType(RoleType roleType) const
 {
     static QHash<RoleType, QByteArray> roles;
     if (roles.isEmpty()) {
         // Insert user visible roles that can be accessed with
         // KFileItemModel::roleInformation()
         int count = 0;
         const RoleInfoMap *map = rolesInfoMap(count);
         for (int i = 0; i < count; ++i) {
             roles.insert(map[i].roleType, map[i].role);
         }
 
         // Insert internal roles (take care to synchronize the implementation
         // with KFileItemModel::typeForRole() in case if a change is done).
         roles.insert(IsDirRole, "isDir");
         roles.insert(IsLinkRole, "isLink");
         roles.insert(IsHiddenRole, "isHidden");
         roles.insert(IsExpandedRole, "isExpanded");
         roles.insert(IsExpandableRole, "isExpandable");
         roles.insert(ExpandedParentsCountRole, "expandedParentsCount");
 
         Q_ASSERT(roles.count() == RolesCount);
     };
 
     return roles.value(roleType);
 }
 
 QHash<QByteArray, QVariant> KFileItemModel::retrieveData(const KFileItem &item, const ItemData *parent) const
 {
     // It is important to insert only roles that are fast to retrieve. E.g.
     // KFileItem::iconName() can be very expensive if the MIME-type is unknown
     // and hence will be retrieved asynchronously by KFileItemModelRolesUpdater.
     QHash<QByteArray, QVariant> data;
     data.insert(sharedValue("url"), item.url());
 
     const bool isDir = item.isDir();
     if (m_requestRole[IsDirRole] && isDir) {
         data.insert(sharedValue("isDir"), true);
     }
 
     if (m_requestRole[IsLinkRole] && item.isLink()) {
         data.insert(sharedValue("isLink"), true);
     }
 
     if (m_requestRole[IsHiddenRole]) {
         data.insert(sharedValue("isHidden"), item.isHidden() || item.mimetype() == QStringLiteral("application/x-trash"));
     }
 
     if (m_requestRole[NameRole]) {
         data.insert(sharedValue("text"), item.text());
     }
 
     if (m_requestRole[ExtensionRole] && !isDir) {
         // TODO KF6 use KFileItem::suffix 464722
         data.insert(sharedValue("extension"), QFileInfo(item.name()).suffix());
     }
 
     if (m_requestRole[SizeRole] && !isDir) {
         data.insert(sharedValue("size"), item.size());
     }
 
     if (m_requestRole[ModificationTimeRole]) {
         // Don't use KFileItem::timeString() or KFileItem::time() as this is too expensive when
         // having several thousands of items. Instead read the raw number from UDSEntry directly
         // and the formatting of the date-time will be done on-demand by the view when the date will be shown.
         const long long dateTime = item.entry().numberValue(KIO::UDSEntry::UDS_MODIFICATION_TIME, -1);
         data.insert(sharedValue("modificationtime"), dateTime);
     }
 
     if (m_requestRole[CreationTimeRole]) {
         // Don't use KFileItem::timeString() or KFileItem::time() as this is too expensive when
         // having several thousands of items. Instead read the raw number from UDSEntry directly
         // and the formatting of the date-time will be done on-demand by the view when the date will be shown.
         const long long dateTime = item.entry().numberValue(KIO::UDSEntry::UDS_CREATION_TIME, -1);
         data.insert(sharedValue("creationtime"), dateTime);
     }
 
     if (m_requestRole[AccessTimeRole]) {
         // Don't use KFileItem::timeString() or KFileItem::time() as this is too expensive when
         // having several thousands of items. Instead read the raw number from UDSEntry directly
         // and the formatting of the date-time will be done on-demand by the view when the date will be shown.
         const long long dateTime = item.entry().numberValue(KIO::UDSEntry::UDS_ACCESS_TIME, -1);
         data.insert(sharedValue("accesstime"), dateTime);
     }
 
     if (m_requestRole[PermissionsRole]) {
         data.insert(sharedValue("permissions"), QVariantList() << item.permissionsString() << item.permissions());
     }
 
     if (m_requestRole[OwnerRole]) {
         data.insert(sharedValue("owner"), item.user());
     }
 
     if (m_requestRole[GroupRole]) {
         data.insert(sharedValue("group"), item.group());
     }
 
     if (m_requestRole[DestinationRole]) {
         QString destination = item.linkDest();
         if (destination.isEmpty()) {
             destination = QLatin1Char('-');
         }
         data.insert(sharedValue("destination"), destination);
     }
 
     if (m_requestRole[PathRole]) {
         QString path;
         if (item.url().scheme() == QLatin1String("trash")) {
             path = item.entry().stringValue(KIO::UDSEntry::UDS_EXTRA);
         } else {
             // For performance reasons cache the home-path in a static QString
             // (see QDir::homePath() for more details)
             static QString homePath;
             if (homePath.isEmpty()) {
                 homePath = QDir::homePath();
             }
 
             path = item.localPath();
             if (path.startsWith(homePath)) {
                 path.replace(0, homePath.length(), QLatin1Char('~'));
             }
         }
 
         const int index = path.lastIndexOf(item.text());
         path = path.mid(0, index - 1);
         data.insert(sharedValue("path"), path);
     }
 
     if (m_requestRole[DeletionTimeRole]) {
         QDateTime deletionTime;
         if (item.url().scheme() == QLatin1String("trash")) {
             deletionTime = QDateTime::fromString(item.entry().stringValue(KIO::UDSEntry::UDS_EXTRA + 1), Qt::ISODate);
         }
         data.insert(sharedValue("deletiontime"), deletionTime);
     }
 
     if (m_requestRole[IsExpandableRole] && isDir) {
         data.insert(sharedValue("isExpandable"), true);
     }
 
     if (m_requestRole[ExpandedParentsCountRole]) {
         if (parent) {
             const int level = expandedParentsCount(parent) + 1;
             data.insert(sharedValue("expandedParentsCount"), level);
         }
     }
 
     if (item.isMimeTypeKnown()) {
         QString iconName = item.iconName();
         if (!QIcon::hasThemeIcon(iconName)) {
             QMimeType mimeType = QMimeDatabase().mimeTypeForName(item.mimetype());
             iconName = mimeType.genericIconName();
         }
 
         data.insert(sharedValue("iconName"), iconName);
 
         if (m_requestRole[TypeRole]) {
             data.insert(sharedValue("type"), item.mimeComment());
         }
     } else if (m_requestRole[TypeRole] && isDir) {
         static const QString folderMimeType = item.mimeComment();
         data.insert(sharedValue("type"), folderMimeType);
     }
 
     return data;
 }
 
 bool KFileItemModel::lessThan(const ItemData *a, const ItemData *b, const QCollator &collator) const
 {
     int result = 0;
 
     if (a->parent != b->parent) {
         const int expansionLevelA = expandedParentsCount(a);
         const int expansionLevelB = expandedParentsCount(b);
 
         // If b has a higher expansion level than a, check if a is a parent
         // of b, and make sure that both expansion levels are equal otherwise.
         for (int i = expansionLevelB; i > expansionLevelA; --i) {
             if (b->parent == a) {
                 return true;
             }
             b = b->parent;
         }
 
         // If a has a higher expansion level than a, check if b is a parent
         // of a, and make sure that both expansion levels are equal otherwise.
         for (int i = expansionLevelA; i > expansionLevelB; --i) {
             if (a->parent == b) {
                 return false;
             }
             a = a->parent;
         }
 
         Q_ASSERT(expandedParentsCount(a) == expandedParentsCount(b));
 
         // Compare the last parents of a and b which are different.
         while (a->parent != b->parent) {
             a = a->parent;
             b = b->parent;
         }
     }
 
     // Show hidden files and folders last
     if (m_sortHiddenLast) {
         const bool isHiddenA = a->item.isHidden();
         const bool isHiddenB = b->item.isHidden();
         if (isHiddenA && !isHiddenB) {
             return false;
         } else if (!isHiddenA && isHiddenB) {
             return true;
         }
     }
 
     if (m_sortDirsFirst || (ContentDisplaySettings::directorySizeCount() && m_sortRole == SizeRole)) {
         const bool isDirA = a->item.isDir();
         const bool isDirB = b->item.isDir();
         if (isDirA && !isDirB) {
             return true;
         } else if (!isDirA && isDirB) {
             return false;
         }
     }
 
     result = sortRoleCompare(a, b, collator);
 
     return (sortOrder() == Qt::AscendingOrder) ? result < 0 : result > 0;
 }
 
 void KFileItemModel::sort(const QList<KFileItemModel::ItemData *>::iterator &begin, const QList<KFileItemModel::ItemData *>::iterator &end) const
 {
     auto lambdaLessThan = [&](const KFileItemModel::ItemData *a, const KFileItemModel::ItemData *b) {
         return lessThan(a, b, m_collator);
     };
 
     if (m_sortRole == NameRole || isRoleValueNatural(m_sortRole)) {
         // Sorting by string can be expensive, in particular if natural sorting is
         // enabled. Use all CPU cores to speed up the sorting process.
         static const int numberOfThreads = QThread::idealThreadCount();
         parallelMergeSort(begin, end, lambdaLessThan, numberOfThreads);
     } else {
         // Sorting by other roles is quite fast. Use only one thread to prevent
         // problems caused by non-reentrant comparison functions, see
         // https://bugs.kde.org/show_bug.cgi?id=312679
         mergeSort(begin, end, lambdaLessThan);
     }
 }
 
 int KFileItemModel::sortRoleCompare(const ItemData *a, const ItemData *b, const QCollator &collator) const
 {
     // This function must never return 0, because that would break stable
     // sorting, which leads to all kinds of bugs.
     // See: https://bugs.kde.org/show_bug.cgi?id=433247
     // If two items have equal sort values, let the fallbacks at the bottom of
     // the function handle it.
     const KFileItem &itemA = a->item;
     const KFileItem &itemB = b->item;
 
     int result = 0;
 
     switch (m_sortRole) {
     case NameRole:
         // The name role is handled as default fallback after the switch
         break;
 
     case SizeRole: {
         if (ContentDisplaySettings::directorySizeCount() && itemA.isDir()) {
             // folders first then
             // items A and B are folders thanks to lessThan checks
             auto valueA = a->values.value("count");
             auto valueB = b->values.value("count");
             if (valueA.isNull()) {
                 if (!valueB.isNull()) {
                     return -1;
                 }
             } else if (valueB.isNull()) {
                 return +1;
             } else {
                 if (valueA.toLongLong() < valueB.toLongLong()) {
                     return -1;
                 } else if (valueA.toLongLong() > valueB.toLongLong()) {
                     return +1;
                 }
             }
             break;
         }
 
         KIO::filesize_t sizeA = 0;
         if (itemA.isDir()) {
             sizeA = a->values.value("size").toULongLong();
         } else {
             sizeA = itemA.size();
         }
         KIO::filesize_t sizeB = 0;
         if (itemB.isDir()) {
             sizeB = b->values.value("size").toULongLong();
         } else {
             sizeB = itemB.size();
         }
         if (sizeA < sizeB) {
             return -1;
         } else if (sizeA > sizeB) {
             return +1;
         }
         break;
     }
 
     case ModificationTimeRole: {
         const long long dateTimeA = itemA.entry().numberValue(KIO::UDSEntry::UDS_MODIFICATION_TIME, -1);
         const long long dateTimeB = itemB.entry().numberValue(KIO::UDSEntry::UDS_MODIFICATION_TIME, -1);
         if (dateTimeA < dateTimeB) {
             return -1;
         } else if (dateTimeA > dateTimeB) {
             return +1;
         }
         break;
     }
 
     case AccessTimeRole: {
         const long long dateTimeA = itemA.entry().numberValue(KIO::UDSEntry::UDS_ACCESS_TIME, -1);
         const long long dateTimeB = itemB.entry().numberValue(KIO::UDSEntry::UDS_ACCESS_TIME, -1);
         if (dateTimeA < dateTimeB) {
             return -1;
         } else if (dateTimeA > dateTimeB) {
             return +1;
         }
         break;
     }
 
     case CreationTimeRole: {
         const long long dateTimeA = itemA.entry().numberValue(KIO::UDSEntry::UDS_CREATION_TIME, -1);
         const long long dateTimeB = itemB.entry().numberValue(KIO::UDSEntry::UDS_CREATION_TIME, -1);
         if (dateTimeA < dateTimeB) {
             return -1;
         } else if (dateTimeA > dateTimeB) {
             return +1;
         }
         break;
     }
 
     case DeletionTimeRole: {
         const QDateTime dateTimeA = a->values.value("deletiontime").toDateTime();
         const QDateTime dateTimeB = b->values.value("deletiontime").toDateTime();
         if (dateTimeA < dateTimeB) {
             return -1;
         } else if (dateTimeA > dateTimeB) {
             return +1;
         }
         break;
     }
 
     case RatingRole:
     case WidthRole:
     case HeightRole:
     case PublisherRole:
     case PageCountRole:
     case WordCountRole:
     case LineCountRole:
     case TrackRole:
     case ReleaseYearRole: {
         result = a->values.value(roleForType(m_sortRole)).toInt() - b->values.value(roleForType(m_sortRole)).toInt();
         break;
     }
 
     case DimensionsRole: {
         const QByteArray role = roleForType(m_sortRole);
         const QSize dimensionsA = a->values.value(role).toSize();
         const QSize dimensionsB = b->values.value(role).toSize();
 
         if (dimensionsA.width() == dimensionsB.width()) {
             result = dimensionsA.height() - dimensionsB.height();
         } else {
             result = dimensionsA.width() - dimensionsB.width();
         }
         break;
     }
 
     default: {
         const QByteArray role = roleForType(m_sortRole);
         const QString roleValueA = a->values.value(role).toString();
         const QString roleValueB = b->values.value(role).toString();
         if (!roleValueA.isEmpty() && roleValueB.isEmpty()) {
             return -1;
         } else if (roleValueA.isEmpty() && !roleValueB.isEmpty()) {
             return +1;
         } else if (isRoleValueNatural(m_sortRole)) {
             result = stringCompare(roleValueA, roleValueB, collator);
         } else {
             result = QString::compare(roleValueA, roleValueB);
         }
         break;
     }
     }
 
     if (result != 0) {
         // The current sort role was sufficient to define an order
         return result;
     }
 
     // Fallback #1: Compare the text of the items
     result = stringCompare(itemA.text(), itemB.text(), collator);
     if (result != 0) {
         return result;
     }
 
     // Fallback #2: KFileItem::text() may not be unique in case UDS_DISPLAY_NAME is used
     result = stringCompare(itemA.name(), itemB.name(), collator);
     if (result != 0) {
         return result;
     }
 
     // Fallback #3: It must be assured that the sort order is always unique even if two values have been
     // equal. In this case a comparison of the URL is done which is unique in all cases
     // within KDirLister.
     return QString::compare(itemA.url().url(), itemB.url().url(), Qt::CaseSensitive);
 }
 
 int KFileItemModel::stringCompare(const QString &a, const QString &b, const QCollator &collator) const
 {
     QMutexLocker collatorLock(s_collatorMutex());
 
     if (m_naturalSorting) {
         return collator.compare(a, b);
     }
 
     const int result = QString::compare(a, b, collator.caseSensitivity());
     if (result != 0 || collator.caseSensitivity() == Qt::CaseSensitive) {
         // Only return the result, if the strings are not equal. If they are equal by a case insensitive
         // comparison, still a deterministic sort order is required. A case sensitive
         // comparison is done as fallback.
         return result;
     }
 
     return QString::compare(a, b, Qt::CaseSensitive);
 }
 
 QList<QPair<int, QVariant>> KFileItemModel::nameRoleGroups() const
 {
     Q_ASSERT(!m_itemData.isEmpty());
 
     const int maxIndex = count() - 1;
     QList<QPair<int, QVariant>> groups;
 
     QString groupValue;
     QChar firstChar;
     for (int i = 0; i <= maxIndex; ++i) {
         if (isChildItem(i)) {
             continue;
         }
 
         const QString name = m_itemData.at(i)->item.text();
 
         // Use the first character of the name as group indication
         QChar newFirstChar = name.at(0).toUpper();
         if (newFirstChar == QLatin1Char('~') && name.length() > 1) {
             newFirstChar = name.at(1).toUpper();
         }
 
         if (firstChar != newFirstChar) {
             QString newGroupValue;
             if (newFirstChar.isLetter()) {
                 if (m_collator.compare(newFirstChar, QChar(QLatin1Char('A'))) >= 0 && m_collator.compare(newFirstChar, QChar(QLatin1Char('Z'))) <= 0) {
                     // WARNING! Symbols based on latin 'Z' like 'Z' with acute are treated wrong as non Latin and put in a new group.
 
                     // Try to find a matching group in the range 'A' to 'Z'.
                     static std::vector<QChar> lettersAtoZ;
                     lettersAtoZ.reserve('Z' - 'A' + 1);
                     if (lettersAtoZ.empty()) {
                         for (char c = 'A'; c <= 'Z'; ++c) {
                             lettersAtoZ.push_back(QLatin1Char(c));
                         }
                     }
 
                     auto localeAwareLessThan = [this](QChar c1, QChar c2) -> bool {
                         return m_collator.compare(c1, c2) < 0;
                     };
 
                     std::vector<QChar>::iterator it = std::lower_bound(lettersAtoZ.begin(), lettersAtoZ.end(), newFirstChar, localeAwareLessThan);
                     if (it != lettersAtoZ.end()) {
                         if (localeAwareLessThan(newFirstChar, *it)) {
                             // newFirstChar belongs to the group preceding *it.
                             // Example: for an umlaut 'A' in the German locale, *it would be 'B' now.
                             --it;
                         }
                         newGroupValue = *it;
                     }
 
                 } else {
                     // Symbols from non Latin-based scripts
                     newGroupValue = newFirstChar;
                 }
             } else if (newFirstChar >= QLatin1Char('0') && newFirstChar <= QLatin1Char('9')) {
                 // Apply group '0 - 9' for any name that starts with a digit
                 newGroupValue = i18nc("@title:group Groups that start with a digit", "0 - 9");
             } else {
                 newGroupValue = i18nc("@title:group", "Others");
             }
 
             if (newGroupValue != groupValue) {
                 groupValue = newGroupValue;
                 groups.append(QPair<int, QVariant>(i, newGroupValue));
             }
 
             firstChar = newFirstChar;
         }
     }
     return groups;
 }
 
 QList<QPair<int, QVariant>> KFileItemModel::sizeRoleGroups() const
 {
     Q_ASSERT(!m_itemData.isEmpty());
 
     const int maxIndex = count() - 1;
     QList<QPair<int, QVariant>> groups;
 
     QString groupValue;
     for (int i = 0; i <= maxIndex; ++i) {
         if (isChildItem(i)) {
             continue;
         }
 
         const KFileItem &item = m_itemData.at(i)->item;
         KIO::filesize_t fileSize = !item.isNull() ? item.size() : ~0U;
         QString newGroupValue;
         if (!item.isNull() && item.isDir()) {
             if (ContentDisplaySettings::directorySizeCount() || m_sortDirsFirst) {
                 newGroupValue = i18nc("@title:group Size", "Folders");
             } else {
                 fileSize = m_itemData.at(i)->values.value("size").toULongLong();
             }
         }
 
         if (newGroupValue.isEmpty()) {
             if (fileSize < 5 * 1024 * 1024) { // < 5 MB
                 newGroupValue = i18nc("@title:group Size", "Small");
             } else if (fileSize < 10 * 1024 * 1024) { // < 10 MB
                 newGroupValue = i18nc("@title:group Size", "Medium");
             } else {
                 newGroupValue = i18nc("@title:group Size", "Big");
             }
         }
 
         if (newGroupValue != groupValue) {
             groupValue = newGroupValue;
             groups.append(QPair<int, QVariant>(i, newGroupValue));
         }
     }
 
     return groups;
 }
 
 QList<QPair<int, QVariant>> KFileItemModel::timeRoleGroups(const std::function<QDateTime(const ItemData *)> &fileTimeCb) const
 {
     Q_ASSERT(!m_itemData.isEmpty());
 
     const int maxIndex = count() - 1;
     QList<QPair<int, QVariant>> groups;
 
     const QDate currentDate = QDate::currentDate();
 
     QDate previousFileDate;
     QString groupValue;
     for (int i = 0; i <= maxIndex; ++i) {
         if (isChildItem(i)) {
             continue;
         }
 
         const QDateTime fileTime = fileTimeCb(m_itemData.at(i));
         const QDate fileDate = fileTime.date();
         if (fileDate == previousFileDate) {
             // The current item is in the same group as the previous item
             continue;
         }
         previousFileDate = fileDate;
 
         const int daysDistance = fileDate.daysTo(currentDate);
 
         QString newGroupValue;
         if (currentDate.year() == fileDate.year() && currentDate.month() == fileDate.month()) {
             switch (daysDistance / 7) {
             case 0:
                 switch (daysDistance) {
                 case 0:
                     newGroupValue = i18nc("@title:group Date", "Today");
                     break;
                 case 1:
                     newGroupValue = i18nc("@title:group Date", "Yesterday");
                     break;
                 default:
                     newGroupValue = fileTime.toString(i18nc("@title:group Date: The week day name: dddd", "dddd"));
                     newGroupValue = i18nc(
                         "Can be used to script translation of \"dddd\""
                         "with context @title:group Date",
                         "%1",
                         newGroupValue);
                 }
                 break;
             case 1:
                 newGroupValue = i18nc("@title:group Date", "One Week Ago");
                 break;
             case 2:
                 newGroupValue = i18nc("@title:group Date", "Two Weeks Ago");
                 break;
             case 3:
                 newGroupValue = i18nc("@title:group Date", "Three Weeks Ago");
                 break;
             case 4:
             case 5:
                 newGroupValue = i18nc("@title:group Date", "Earlier this Month");
                 break;
             default:
                 Q_ASSERT(false);
             }
         } else {
             const QDate lastMonthDate = currentDate.addMonths(-1);
             if (lastMonthDate.year() == fileDate.year() && lastMonthDate.month() == fileDate.month()) {
                 if (daysDistance == 1) {
                     const KLocalizedString format = ki18nc(
                         "@title:group Date: "
                         "MMMM is full month name in current locale, and yyyy is "
                         "full year number. You must keep the ' don't use any fancy \" or « or similar. The ' is not shown to the user, it's there to mark a "
                         "part of the text that should not be formatted as a date",
                         "'Yesterday' (MMMM, yyyy)");
                     const QString translatedFormat = format.toString();
                     if (translatedFormat.count(QLatin1Char('\'')) == 2) {
                         newGroupValue = fileTime.toString(translatedFormat);
                         newGroupValue = i18nc(
                             "Can be used to script translation of "
                             "\"'Yesterday' (MMMM, yyyy)\" with context @title:group Date",
                             "%1",
                             newGroupValue);
                     } else {
                         qCWarning(DolphinDebug).nospace()
                             << "A wrong translation was found: " << translatedFormat << ". Please file a bug report at bugs.kde.org";
                         const QString untranslatedFormat = format.toString({QLatin1String("en_US")});
                         newGroupValue = fileTime.toString(untranslatedFormat);
                     }
                 } else if (daysDistance <= 7) {
                     newGroupValue =
                         fileTime.toString(i18nc("@title:group Date: "
                                                 "The week day name: dddd, MMMM is full month name "
                                                 "in current locale, and yyyy is full year number.",
                                                 "dddd (MMMM, yyyy)"));
                     newGroupValue = i18nc(
                         "Can be used to script translation of "
                         "\"dddd (MMMM, yyyy)\" with context @title:group Date",
                         "%1",
                         newGroupValue);
                 } else if (daysDistance <= 7 * 2) {
                     const KLocalizedString format = ki18nc(
                         "@title:group Date: "
                         "MMMM is full month name in current locale, and yyyy is "
                         "full year number. You must keep the ' don't use any fancy \" or « or similar. The ' is not shown to the user, it's there to mark a "
                         "part of the text that should not be formatted as a date",
                         "'One Week Ago' (MMMM, yyyy)");
                     const QString translatedFormat = format.toString();
                     if (translatedFormat.count(QLatin1Char('\'')) == 2) {
                         newGroupValue = fileTime.toString(translatedFormat);
                         newGroupValue = i18nc(
                             "Can be used to script translation of "
                             "\"'One Week Ago' (MMMM, yyyy)\" with context @title:group Date",
                             "%1",
                             newGroupValue);
                     } else {
                         qCWarning(DolphinDebug).nospace()
                             << "A wrong translation was found: " << translatedFormat << ". Please file a bug report at bugs.kde.org";
                         const QString untranslatedFormat = format.toString({QLatin1String("en_US")});
                         newGroupValue = fileTime.toString(untranslatedFormat);
                     }
                 } else if (daysDistance <= 7 * 3) {
                     const KLocalizedString format = ki18nc(
                         "@title:group Date: "
                         "MMMM is full month name in current locale, and yyyy is "
                         "full year number. You must keep the ' don't use any fancy \" or « or similar. The ' is not shown to the user, it's there to mark a "
                         "part of the text that should not be formatted as a date",
                         "'Two Weeks Ago' (MMMM, yyyy)");
                     const QString translatedFormat = format.toString();
                     if (translatedFormat.count(QLatin1Char('\'')) == 2) {
                         newGroupValue = fileTime.toString(translatedFormat);
                         newGroupValue = i18nc(
                             "Can be used to script translation of "
                             "\"'Two Weeks Ago' (MMMM, yyyy)\" with context @title:group Date",
                             "%1",
                             newGroupValue);
                     } else {
                         qCWarning(DolphinDebug).nospace()
                             << "A wrong translation was found: " << translatedFormat << ". Please file a bug report at bugs.kde.org";
                         const QString untranslatedFormat = format.toString({QLatin1String("en_US")});
                         newGroupValue = fileTime.toString(untranslatedFormat);
                     }
                 } else if (daysDistance <= 7 * 4) {
                     const KLocalizedString format = ki18nc(
                         "@title:group Date: "
                         "MMMM is full month name in current locale, and yyyy is "
                         "full year number. You must keep the ' don't use any fancy \" or « or similar. The ' is not shown to the user, it's there to mark a "
                         "part of the text that should not be formatted as a date",
                         "'Three Weeks Ago' (MMMM, yyyy)");
                     const QString translatedFormat = format.toString();
                     if (translatedFormat.count(QLatin1Char('\'')) == 2) {
                         newGroupValue = fileTime.toString(translatedFormat);
                         newGroupValue = i18nc(
                             "Can be used to script translation of "
                             "\"'Three Weeks Ago' (MMMM, yyyy)\" with context @title:group Date",
                             "%1",
                             newGroupValue);
                     } else {
                         qCWarning(DolphinDebug).nospace()
                             << "A wrong translation was found: " << translatedFormat << ". Please file a bug report at bugs.kde.org";
                         const QString untranslatedFormat = format.toString({QLatin1String("en_US")});
                         newGroupValue = fileTime.toString(untranslatedFormat);
                     }
                 } else {
                     const KLocalizedString format = ki18nc(
                         "@title:group Date: "
                         "MMMM is full month name in current locale, and yyyy is "
                         "full year number. You must keep the ' don't use any fancy \" or « or similar. The ' is not shown to the user, it's there to mark a "
                         "part of the text that should not be formatted as a date",
                         "'Earlier on' MMMM, yyyy");
                     const QString translatedFormat = format.toString();
                     if (translatedFormat.count(QLatin1Char('\'')) == 2) {
                         newGroupValue = fileTime.toString(translatedFormat);
                         newGroupValue = i18nc(
                             "Can be used to script translation of "
                             "\"'Earlier on' MMMM, yyyy\" with context @title:group Date",
                             "%1",
                             newGroupValue);
                     } else {
                         qCWarning(DolphinDebug).nospace()
                             << "A wrong translation was found: " << translatedFormat << ". Please file a bug report at bugs.kde.org";
                         const QString untranslatedFormat = format.toString({QLatin1String("en_US")});
                         newGroupValue = fileTime.toString(untranslatedFormat);
                     }
                 }
             } else {
                 newGroupValue =
                     fileTime.toString(i18nc("@title:group "
                                             "The month and year: MMMM is full month name in current locale, "
                                             "and yyyy is full year number",
                                             "MMMM, yyyy"));
                 newGroupValue = i18nc(
                     "Can be used to script translation of "
                     "\"MMMM, yyyy\" with context @title:group Date",
                     "%1",
                     newGroupValue);
             }
         }
 
         if (newGroupValue != groupValue) {
             groupValue = newGroupValue;
             groups.append(QPair<int, QVariant>(i, newGroupValue));
         }
     }
 
     return groups;
 }
 
 QList<QPair<int, QVariant>> KFileItemModel::permissionRoleGroups() const
 {
     Q_ASSERT(!m_itemData.isEmpty());
 
     const int maxIndex = count() - 1;
     QList<QPair<int, QVariant>> groups;
 
     QString permissionsString;
     QString groupValue;
     for (int i = 0; i <= maxIndex; ++i) {
         if (isChildItem(i)) {
             continue;
         }
 
         const ItemData *itemData = m_itemData.at(i);
         const QString newPermissionsString = itemData->values.value("permissions").toString();
         if (newPermissionsString == permissionsString) {
             continue;
         }
         permissionsString = newPermissionsString;
 
         const QFileInfo info(itemData->item.url().toLocalFile());
 
         // Set user string
         QString user;
         if (info.permission(QFile::ReadUser)) {
             user = i18nc("@item:intext Access permission, concatenated", "Read, ");
         }
         if (info.permission(QFile::WriteUser)) {
             user += i18nc("@item:intext Access permission, concatenated", "Write, ");
         }
         if (info.permission(QFile::ExeUser)) {
             user += i18nc("@item:intext Access permission, concatenated", "Execute, ");
         }
         user = user.isEmpty() ? i18nc("@item:intext Access permission, concatenated", "Forbidden") : user.mid(0, user.length() - 2);
 
         // Set group string
         QString group;
         if (info.permission(QFile::ReadGroup)) {
             group = i18nc("@item:intext Access permission, concatenated", "Read, ");
         }
         if (info.permission(QFile::WriteGroup)) {
             group += i18nc("@item:intext Access permission, concatenated", "Write, ");
         }
         if (info.permission(QFile::ExeGroup)) {
             group += i18nc("@item:intext Access permission, concatenated", "Execute, ");
         }
         group = group.isEmpty() ? i18nc("@item:intext Access permission, concatenated", "Forbidden") : group.mid(0, group.length() - 2);
 
         // Set others string
         QString others;
         if (info.permission(QFile::ReadOther)) {
             others = i18nc("@item:intext Access permission, concatenated", "Read, ");
         }
         if (info.permission(QFile::WriteOther)) {
             others += i18nc("@item:intext Access permission, concatenated", "Write, ");
         }
         if (info.permission(QFile::ExeOther)) {
             others += i18nc("@item:intext Access permission, concatenated", "Execute, ");
         }
         others = others.isEmpty() ? i18nc("@item:intext Access permission, concatenated", "Forbidden") : others.mid(0, others.length() - 2);
 
         const QString newGroupValue = i18nc("@title:group Files and folders by permissions", "User: %1 | Group: %2 | Others: %3", user, group, others);
         if (newGroupValue != groupValue) {
             groupValue = newGroupValue;
             groups.append(QPair<int, QVariant>(i, newGroupValue));
         }
     }
 
     return groups;
 }
 
 QList<QPair<int, QVariant>> KFileItemModel::ratingRoleGroups() const
 {
     Q_ASSERT(!m_itemData.isEmpty());
 
     const int maxIndex = count() - 1;
     QList<QPair<int, QVariant>> groups;
 
     int groupValue = -1;
     for (int i = 0; i <= maxIndex; ++i) {
         if (isChildItem(i)) {
             continue;
         }
         const int newGroupValue = m_itemData.at(i)->values.value("rating", 0).toInt();
         if (newGroupValue != groupValue) {
             groupValue = newGroupValue;
             groups.append(QPair<int, QVariant>(i, newGroupValue));
         }
     }
 
     return groups;
 }
 
 QList<QPair<int, QVariant>> KFileItemModel::genericStringRoleGroups(const QByteArray &role) const
 {
     Q_ASSERT(!m_itemData.isEmpty());
 
     const int maxIndex = count() - 1;
     QList<QPair<int, QVariant>> groups;
 
     bool isFirstGroupValue = true;
     QString groupValue;
     for (int i = 0; i <= maxIndex; ++i) {
         if (isChildItem(i)) {
             continue;
         }
         const QString newGroupValue = m_itemData.at(i)->values.value(role).toString();
         if (newGroupValue != groupValue || isFirstGroupValue) {
             groupValue = newGroupValue;
             groups.append(QPair<int, QVariant>(i, newGroupValue));
             isFirstGroupValue = false;
         }
     }
 
     return groups;
 }
 
 void KFileItemModel::emitSortProgress(int resolvedCount)
 {
     // Be tolerant against a resolvedCount with a wrong range.
     // Although there should not be a case where KFileItemModelRolesUpdater
     // (= caller) provides a wrong range, it is important to emit
     // a useful progress information even if there is an unexpected
     // implementation issue.
 
     const int itemCount = count();
     if (resolvedCount >= itemCount) {
         m_sortingProgressPercent = -1;
         if (m_resortAllItemsTimer->isActive()) {
             m_resortAllItemsTimer->stop();
             resortAllItems();
         }
 
         Q_EMIT directorySortingProgress(100);
     } else if (itemCount > 0) {
         resolvedCount = qBound(0, resolvedCount, itemCount);
 
         const int progress = resolvedCount * 100 / itemCount;
         if (m_sortingProgressPercent != progress) {
             m_sortingProgressPercent = progress;
             Q_EMIT directorySortingProgress(progress);
         }
     }
 }
 
 const KFileItemModel::RoleInfoMap *KFileItemModel::rolesInfoMap(int &count)
 {
     static const RoleInfoMap rolesInfoMap[] = {
         // clang-format off
     //  |         role           |        roleType        |                role translation          |         group translation                                        | requires Baloo | requires indexer
         { nullptr,               NoRole,                  KLazyLocalizedString(),                    KLazyLocalizedString(),        KLazyLocalizedString(),                    false,           false },
         { "text",                NameRole,                kli18nc("@label", "Name"),                 KLazyLocalizedString(),        KLazyLocalizedString(),                    false,           false },
         { "size",                SizeRole,                kli18nc("@label", "Size"),                 KLazyLocalizedString(),        KLazyLocalizedString(),                    false,           false },
         { "modificationtime",    ModificationTimeRole,    kli18nc("@label", "Modified"),             KLazyLocalizedString(),        kli18nc("@tooltip", "The date format can be selected in settings."),                    false,           false },
         { "creationtime",        CreationTimeRole,        kli18nc("@label", "Created"),              KLazyLocalizedString(),        kli18nc("@tooltip", "The date format can be selected in settings."),                    false,           false },
         { "accesstime",          AccessTimeRole,          kli18nc("@label", "Accessed"),             KLazyLocalizedString(),        kli18nc("@tooltip", "The date format can be selected in settings."),                    false,           false },
         { "type",                TypeRole,                kli18nc("@label", "Type"),                 KLazyLocalizedString(),        KLazyLocalizedString(),                    false,           false },
         { "rating",              RatingRole,              kli18nc("@label", "Rating"),               KLazyLocalizedString(),        KLazyLocalizedString(),                    true,            false },
         { "tags",                TagsRole,                kli18nc("@label", "Tags"),                 KLazyLocalizedString(),        KLazyLocalizedString(),                    true,            false },
         { "comment",             CommentRole,             kli18nc("@label", "Comment"),              KLazyLocalizedString(),        KLazyLocalizedString(),                    true,            false },
         { "title",               TitleRole,               kli18nc("@label", "Title"),                kli18nc("@label", "Document"), KLazyLocalizedString(),                    true,            true  },
         { "author",              AuthorRole,              kli18nc("@label", "Author"),               kli18nc("@label", "Document"), KLazyLocalizedString(),                    true,            true  },
         { "publisher",           PublisherRole,           kli18nc("@label", "Publisher"),            kli18nc("@label", "Document"), KLazyLocalizedString(),                    true,            true  },
         { "pageCount",           PageCountRole,           kli18nc("@label", "Page Count"),           kli18nc("@label", "Document"), KLazyLocalizedString(),                    true,            true  },
         { "wordCount",           WordCountRole,           kli18nc("@label", "Word Count"),           kli18nc("@label", "Document"), KLazyLocalizedString(),                    true,            true  },
         { "lineCount",           LineCountRole,           kli18nc("@label", "Line Count"),           kli18nc("@label", "Document"), KLazyLocalizedString(),                    true,            true  },
         { "imageDateTime",       ImageDateTimeRole,       kli18nc("@label", "Date Photographed"),    kli18nc("@label", "Image"),    KLazyLocalizedString(),                    true,            true  },
         { "dimensions",          DimensionsRole,          kli18nc("@label width x height", "Dimensions"), kli18nc("@label", "Image"), KLazyLocalizedString(),                  true,            true  },
         { "width",               WidthRole,               kli18nc("@label", "Width"),                kli18nc("@label", "Image"),    KLazyLocalizedString(),                    true,            true  },
         { "height",              HeightRole,              kli18nc("@label", "Height"),               kli18nc("@label", "Image"),    KLazyLocalizedString(),                    true,            true  },
         { "orientation",         OrientationRole,         kli18nc("@label", "Orientation"),          kli18nc("@label", "Image"),    KLazyLocalizedString(),                    true,            true  },
         { "artist",              ArtistRole,              kli18nc("@label", "Artist"),               kli18nc("@label", "Audio"),    KLazyLocalizedString(),                    true,            true  },
         { "genre",               GenreRole,               kli18nc("@label", "Genre"),                kli18nc("@label", "Audio"),    KLazyLocalizedString(),                    true,            true  },
         { "album",               AlbumRole,               kli18nc("@label", "Album"),                kli18nc("@label", "Audio"),    KLazyLocalizedString(),                    true,            true  },
         { "duration",            DurationRole,            kli18nc("@label", "Duration"),             kli18nc("@label", "Audio"),    KLazyLocalizedString(),                    true,            true  },
         { "bitrate",             BitrateRole,             kli18nc("@label", "Bitrate"),              kli18nc("@label", "Audio"),    KLazyLocalizedString(),                    true,            true  },
         { "track",               TrackRole,               kli18nc("@label", "Track"),                kli18nc("@label", "Audio"),    KLazyLocalizedString(),                    true,            true  },
         { "releaseYear",         ReleaseYearRole,         kli18nc("@label", "Release Year"),         kli18nc("@label", "Audio"),    KLazyLocalizedString(),                    true,            true  },
         { "aspectRatio",         AspectRatioRole,         kli18nc("@label", "Aspect Ratio"),         kli18nc("@label", "Video"),    KLazyLocalizedString(),                    true,            true  },
         { "frameRate",           FrameRateRole,           kli18nc("@label", "Frame Rate"),           kli18nc("@label", "Video"),    KLazyLocalizedString(),                    true,            true  },
         { "path",                PathRole,                kli18nc("@label", "Path"),                 kli18nc("@label", "Other"),    KLazyLocalizedString(),                    false,           false },
         { "extension",           ExtensionRole,           kli18nc("@label", "File Extension"),       kli18nc("@label", "Other"),    KLazyLocalizedString(),                    false,           false },
         { "deletiontime",        DeletionTimeRole,        kli18nc("@label", "Deletion Time"),        kli18nc("@label", "Other"),    KLazyLocalizedString(),                    false,           false },
         { "destination",         DestinationRole,         kli18nc("@label", "Link Destination"),     kli18nc("@label", "Other"),    KLazyLocalizedString(),                    false,           false },
         { "originUrl",           OriginUrlRole,           kli18nc("@label", "Downloaded From"),      kli18nc("@label", "Other"),    KLazyLocalizedString(),                    true,            false },
         { "permissions",         PermissionsRole,         kli18nc("@label", "Permissions"),          kli18nc("@label", "Other"),    kli18nc("@tooltip", "The permission format can be changed in settings. Options are Symbolic, Numeric (Octal) or Combined formats"),        false,           false },
         { "owner",               OwnerRole,               kli18nc("@label", "Owner"),                kli18nc("@label", "Other"),    KLazyLocalizedString(),                    false,           false },
         { "group",               GroupRole,               kli18nc("@label", "User Group"),           kli18nc("@label", "Other"),    KLazyLocalizedString(),                    false,           false },
     };
     // clang-format on
 
     count = sizeof(rolesInfoMap) / sizeof(RoleInfoMap);
     return rolesInfoMap;
 }
 
 void KFileItemModel::determineMimeTypes(const KFileItemList &items, int timeout)
 {
     QElapsedTimer timer;
     timer.start();
     for (const KFileItem &item : items) {
         // Only determine mime types for files here. For directories,
         // KFileItem::determineMimeType() reads the .directory file inside to
         // load the icon, but this is not necessary at all if we just need the
         // type. Some special code for setting the correct mime type for
         // directories is in retrieveData().
         if (!item.isDir()) {
             item.determineMimeType();
         }
 
         if (timer.elapsed() > timeout) {
             // Don't block the user interface, let the remaining items
             // be resolved asynchronously.
             return;
         }
     }
 }
 
 QByteArray KFileItemModel::sharedValue(const QByteArray &value)
 {
     static QSet<QByteArray> pool;
     const QSet<QByteArray>::const_iterator it = pool.constFind(value);
 
     if (it != pool.constEnd()) {
         return *it;
     } else {
         pool.insert(value);
         return value;
     }
 }
 
 bool KFileItemModel::isConsistent() const
 {
     // m_items may contain less items than m_itemData because m_items
     // is populated lazily, see KFileItemModel::index(const QUrl& url).
     if (m_items.count() > m_itemData.count()) {
         return false;
     }
 
     for (int i = 0, iMax = count(); i < iMax; ++i) {
         // Check if m_items and m_itemData are consistent.
         const KFileItem item = fileItem(i);
         if (item.isNull()) {
             qCWarning(DolphinDebug) << "Item" << i << "is null";
             return false;
         }
 
         const int itemIndex = index(item);
         if (itemIndex != i) {
             qCWarning(DolphinDebug) << "Item" << i << "has a wrong index:" << itemIndex;
             return false;
         }
 
         // Check if the items are sorted correctly.
         if (i > 0 && !lessThan(m_itemData.at(i - 1), m_itemData.at(i), m_collator)) {
             qCWarning(DolphinDebug) << "The order of items" << i - 1 << "and" << i << "is wrong:" << fileItem(i - 1) << fileItem(i);
             return false;
         }
 
         // Check if all parent-child relationships are consistent.
         const ItemData *data = m_itemData.at(i);
         const ItemData *parent = data->parent;
         if (parent) {
             if (expandedParentsCount(data) != expandedParentsCount(parent) + 1) {
                 qCWarning(DolphinDebug) << "expandedParentsCount is inconsistent for parent" << parent->item << "and child" << data->item;
                 return false;
             }
 
             const int parentIndex = index(parent->item);
             if (parentIndex >= i) {
                 qCWarning(DolphinDebug) << "Index" << parentIndex << "of parent" << parent->item << "is not smaller than index" << i << "of child"
                                         << data->item;
                 return false;
             }
         }
     }
 
     return true;
 }
 
 void KFileItemModel::slotListerError(KIO::Job *job)
 {
     if (job->error() == KIO::ERR_IS_FILE) {
         if (auto *listJob = qobject_cast<KIO::ListJob *>(job)) {
             Q_EMIT urlIsFileError(listJob->url());
         }
     } else {
         const QString errorString = job->errorString();
         Q_EMIT errorMessage(!errorString.isEmpty() ? errorString : i18nc("@info:status", "Unknown error."));
     }
 }
 
 #include "moc_kfileitemmodel.cpp"