Warning, file /frameworks/kio/src/filewidgets/kfilefiltercombo.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: Stephan Kulow <coolo@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "kfilefiltercombo.h"
 #include "kfilefilter.h"
 #include "kfilefiltercombo_debug.h"
 
 #include <KLocalizedString>
 #include <QDebug>
 #include <QEvent>
 #include <QLineEdit>
 #include <QMimeDatabase>
 
 #include <config-kiofilewidgets.h>
 
 #include <algorithm>
 #include <utility>
 
 class KFileFilterComboPrivate
 {
 public:
     explicit KFileFilterComboPrivate(KFileFilterCombo *qq)
         : q(qq)
     {
     }
 
     void slotFilterChanged();
 
     KFileFilterCombo *const q;
     // when we have more than 3 mimefilters and no default-filter,
     // we don't show the comments of all mimefilters in one line,
     // instead we show "All supported files". We have to translate
     // that back to the list of mimefilters in currentFilter() tho.
     bool m_hasAllSupportedFiles = false;
     // true when setMimeFilter was called
     bool m_isMimeFilter = false;
     QString m_lastFilter;
     QString m_defaultFilter = i18nc("Default mime type filter that shows all file types", "*|All Files");
 
     QVector<KFileFilter> m_fileFilters;
     QStringList m_filters;
     bool m_allTypes;
 };
 
 KFileFilterCombo::KFileFilterCombo(QWidget *parent)
     : KComboBox(true, parent)
     , d(new KFileFilterComboPrivate(this))
 {
     setTrapReturnKey(true);
     setInsertPolicy(QComboBox::NoInsert);
     connect(this, qOverload<int>(&QComboBox::activated), this, &KFileFilterCombo::filterChanged);
     // TODO KF6: remove this QOverload, only KUrlComboBox::returnPressed(const QString &) will remain
     connect(this, qOverload<const QString &>(&KComboBox::returnPressed), this, &KFileFilterCombo::filterChanged);
     connect(this, &KFileFilterCombo::filterChanged, this, [this]() {
         d->slotFilterChanged();
     });
     d->m_allTypes = false;
 }
 
 KFileFilterCombo::~KFileFilterCombo() = default;
 
 void KFileFilterCombo::setFilter(const QString &filter)
 {
     clear();
     d->m_filters.clear();
     d->m_fileFilters.clear();
     d->m_hasAllSupportedFiles = false;
 
     if (!filter.isEmpty()) {
         QString tmp = filter;
         int index = tmp.indexOf(QLatin1Char('\n'));
         while (index > 0) {
             d->m_filters.append(tmp.left(index));
             tmp.remove(0, index + 1);
             index = tmp.indexOf(QLatin1Char('\n'));
         }
         d->m_filters.append(tmp);
     } else {
         d->m_filters.append(d->m_defaultFilter);
     }
 
     QStringList::ConstIterator it;
     QStringList::ConstIterator end(d->m_filters.constEnd());
     for (it = d->m_filters.constBegin(); it != end; ++it) {
         int tab = (*it).indexOf(QLatin1Char('|'));
         addItem((tab < 0) ? *it : (*it).mid(tab + 1));
     }
 
     d->m_lastFilter = currentText();
     d->m_isMimeFilter = false;
 }
 
 QString KFileFilterCombo::currentFilter() const
 {
     QString f = currentText();
     if (f == itemText(currentIndex())) { // user didn't edit the text
 
         if (!d->m_filters.isEmpty()) {
             f = d->m_filters.value(currentIndex());
         } else {
             f = d->m_fileFilters.value(currentIndex()).toFilterString();
         }
 
         if (d->m_isMimeFilter || (currentIndex() == 0 && d->m_hasAllSupportedFiles)) {
             return f; // we have a MIME type as filter
         }
     }
 
     int tab = f.indexOf(QLatin1Char('|'));
     if (tab < 0) {
         return f;
     } else {
         return f.left(tab);
     }
 }
 
 bool KFileFilterCombo::showsAllTypes() const
 {
     return d->m_allTypes;
 }
 
 QStringList KFileFilterCombo::filters() const
 {
     if (!d->m_filters.isEmpty()) {
         return d->m_filters;
     }
 
     QStringList result;
 
     for (const KFileFilter &filter : std::as_const(d->m_fileFilters)) {
         result << filter.toFilterString();
     }
 
     return result;
 }
 
 void KFileFilterCombo::setCurrentFilter(const QString &filterString)
 {
     if (!d->m_filters.isEmpty()) {
         setCurrentIndex(d->m_filters.indexOf(filterString));
         return;
     }
 
     auto it = std::find_if(d->m_fileFilters.cbegin(), d->m_fileFilters.cend(), [filterString](const KFileFilter &filter) {
         return filterString == filter.toFilterString();
     });
 
     if (it == d->m_fileFilters.cend()) {
         qCWarning(KIO_KFILEWIDGETS_KFILEFILTERCOMBO) << "Could not find filter" << filterString;
         setCurrentIndex(-1);
         Q_EMIT filterChanged();
         return;
     }
 
     setCurrentIndex(std::distance(d->m_fileFilters.cbegin(), it));
     Q_EMIT filterChanged();
 }
 
 void KFileFilterCombo::setMimeFilter(const QStringList &types, const QString &defaultType)
 {
     clear();
     d->m_filters.clear();
     d->m_fileFilters.clear();
     QString delim = QStringLiteral(", ");
     d->m_hasAllSupportedFiles = false;
     bool hasAllFilesFilter = false;
     QMimeDatabase db;
 
     d->m_allTypes = defaultType.isEmpty() && (types.count() > 1);
 
     // If there's MIME types that have the same comment, we will show the extension
     // in addition to the MIME type comment
     QHash<QString, int> allTypeComments;
     for (QStringList::ConstIterator it = types.begin(); it != types.end(); ++it) {
         const QMimeType type = db.mimeTypeForName(*it);
         if (!type.isValid()) {
             qCWarning(KIO_KFILEWIDGETS_KFILEFILTERCOMBO) << *it << "is not a valid MIME type";
             continue;
         }
 
         allTypeComments[type.comment()] += 1;
     }
 
     for (QStringList::ConstIterator it = types.begin(); it != types.end(); ++it) {
         // qDebug() << *it;
         const QMimeType type = db.mimeTypeForName(*it);
         if (!type.isValid()) {
             qCWarning(KIO_KFILEWIDGETS_KFILEFILTERCOMBO) << *it << "is not a valid MIME type";
             continue;
         }
 
         if (type.name().startsWith(QLatin1String("all/")) || type.isDefault()) {
             hasAllFilesFilter = true;
             continue;
         }
 
         KFileFilter filter;
 
         if (allTypeComments.value(type.comment()) > 1) {
             const QString label = i18nc("%1 is the mimetype name, %2 is the extensions", "%1 (%2)", type.comment(), type.suffixes().join(QLatin1String(", ")));
             filter = KFileFilter(label, {}, {*it});
         } else {
             filter = KFileFilter::fromMimeType(*it);
         }
 
         d->m_fileFilters.append(filter);
         addItem(filter.label());
 
         if (type.name() == defaultType) {
             setCurrentIndex(count() - 1);
         }
     }
 
     if (count() == 1) {
         d->m_allTypes = false;
     }
 
     if (d->m_allTypes) {
         QStringList allTypes;
         for (const KFileFilter &filter : std::as_const(d->m_fileFilters)) {
             allTypes << filter.mimePatterns().join(QLatin1Char(' '));
         }
 
         KFileFilter allSupportedFilesFilter;
 
         if (count() <= 3) { // show the MIME type comments of at max 3 types
             QStringList allComments;
             for (const KFileFilter &filter : std::as_const(d->m_fileFilters)) {
                 allComments << filter.label();
             }
 
             allSupportedFilesFilter = KFileFilter(allComments.join(delim), {}, allTypes);
         } else {
             allSupportedFilesFilter = KFileFilter(i18n("All Supported Files"), {}, allTypes);
             d->m_hasAllSupportedFiles = true;
         }
 
         insertItem(0, allSupportedFilesFilter.label());
         d->m_fileFilters.prepend(allSupportedFilesFilter);
         setCurrentIndex(0);
     }
 
     if (hasAllFilesFilter) {
         addItem(i18n("All Files"));
         d->m_fileFilters.append(KFileFilter(i18n("All Files"), {}, {QStringLiteral("application/octet-stream")}));
     }
 
     d->m_lastFilter = currentText();
     d->m_isMimeFilter = true;
 }
 
 void KFileFilterComboPrivate::slotFilterChanged()
 {
     m_lastFilter = q->currentText();
 }
 
 bool KFileFilterCombo::eventFilter(QObject *o, QEvent *e)
 {
     if (o == lineEdit() && e->type() == QEvent::FocusOut) {
         if (currentText() != d->m_lastFilter) {
             Q_EMIT filterChanged();
         }
     }
 
     return KComboBox::eventFilter(o, e);
 }
 
 void KFileFilterCombo::setDefaultFilter(const QString &filter)
 {
     d->m_defaultFilter = filter;
 }
 
 QString KFileFilterCombo::defaultFilter() const
 {
     return d->m_defaultFilter;
 }
 
 bool KFileFilterCombo::isMimeFilter() const
 {
     return d->m_isMimeFilter;
 }
 
 #include "moc_kfilefiltercombo.cpp"