diff --git a/src/ui/keyselectiondialog.cpp b/src/ui/keyselectiondialog.cpp
index b94ce4b78..c40484e6f 100644
--- a/src/ui/keyselectiondialog.cpp
+++ b/src/ui/keyselectiondialog.cpp
@@ -1,1016 +1,1017 @@
 /*  -*- c++ -*-
     keyselectiondialog.cpp
 
     This file is part of libkleopatra, the KDE keymanagement library
     SPDX-FileCopyrightText: 2004 Klarälvdalens Datakonsult AB
 
     Based on kpgpui.cpp
     SPDX-FileCopyrightText: 2001, 2002 the KPGP authors
     See file libkdenetwork/AUTHORS.kpgp for details
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include <config-libkleo.h>
 
 #include "keyselectiondialog.h"
 
 #include "keylistview.h"
 #include "progressdialog.h"
 
 #include <libkleo/dn.h>
 #include <libkleo/formatting.h>
 
 #include <kleo_ui_debug.h>
 
 #include <KConfig>
 #include <KConfigGroup>
 #include <KLocalizedString>
 #include <KMessageBox>
 #include <KSharedConfig>
 
 #include <QGpgME/KeyListJob>
 
 #include <QApplication>
 #include <QCheckBox>
 #include <QDateTime>
 #include <QDialogButtonBox>
 #include <QFrame>
 #include <QHBoxLayout>
 #include <QLabel>
 #include <QLineEdit>
 #include <QMenu>
 #include <QProcess>
 #include <QPushButton>
 #include <QRegExp>
 #include <QScrollBar>
 #include <QStringBuilder>
 #include <QTimer>
 #include <QVBoxLayout>
 
 #include <gpgme++/key.h>
 #include <gpgme++/keylistresult.h>
 
 #include <algorithm>
 #include <iterator>
 #include <string.h>
 
 using namespace Kleo;
 
 static bool checkKeyUsage(const GpgME::Key &key, unsigned int keyUsage, QString *statusString = nullptr)
 {
     auto setStatusString = [statusString](const QString &status) {
         if (statusString) {
             *statusString = status;
         }
     };
 
     if (keyUsage & KeySelectionDialog::ValidKeys) {
         if (key.isInvalid()) {
             if (key.keyListMode() & GpgME::Validate) {
                 qCDebug(KLEO_UI_LOG) << "key is invalid";
                 setStatusString(i18n("The key is not valid."));
                 return false;
             } else {
                 qCDebug(KLEO_UI_LOG) << "key is invalid - ignoring";
             }
         }
         if (key.isExpired()) {
             qCDebug(KLEO_UI_LOG) << "key is expired";
             setStatusString(i18n("The key is expired."));
             return false;
         } else if (key.isRevoked()) {
             qCDebug(KLEO_UI_LOG) << "key is revoked";
             setStatusString(i18n("The key is revoked."));
             return false;
         } else if (key.isDisabled()) {
             qCDebug(KLEO_UI_LOG) << "key is disabled";
             setStatusString(i18n("The key is disabled."));
             return false;
         }
     }
 
     if (keyUsage & KeySelectionDialog::EncryptionKeys && !key.canEncrypt()) {
         qCDebug(KLEO_UI_LOG) << "key can't encrypt";
         setStatusString(i18n("The key is not designated for encryption."));
         return false;
     }
     if (keyUsage & KeySelectionDialog::SigningKeys && !key.canSign()) {
         qCDebug(KLEO_UI_LOG) << "key can't sign";
         setStatusString(i18n("The key is not designated for signing."));
         return false;
     }
     if (keyUsage & KeySelectionDialog::CertificationKeys && !key.canCertify()) {
         qCDebug(KLEO_UI_LOG) << "key can't certify";
         setStatusString(i18n("The key is not designated for certifying."));
         return false;
     }
     if (keyUsage & KeySelectionDialog::AuthenticationKeys && !key.canAuthenticate()) {
         qCDebug(KLEO_UI_LOG) << "key can't authenticate";
         setStatusString(i18n("The key is not designated for authentication."));
         return false;
     }
 
     if (keyUsage & KeySelectionDialog::SecretKeys && !(keyUsage & KeySelectionDialog::PublicKeys) && !key.hasSecret()) {
         qCDebug(KLEO_UI_LOG) << "key isn't secret";
         setStatusString(i18n("The key is not secret."));
         return false;
     }
 
     if (keyUsage & KeySelectionDialog::TrustedKeys && key.protocol() == GpgME::OpenPGP &&
         // only check this for secret keys for now.
         // Seems validity isn't checked for secret keylistings...
         !key.hasSecret()) {
         std::vector<GpgME::UserID> uids = key.userIDs();
         for (std::vector<GpgME::UserID>::const_iterator it = uids.begin(); it != uids.end(); ++it) {
             if (!it->isRevoked() && it->validity() >= GpgME::UserID::Marginal) {
                 return true;
             }
         }
         qCDebug(KLEO_UI_LOG) << "key has no UIDs with validity >= Marginal";
         setStatusString(i18n("The key is not trusted enough."));
         return false;
     }
     // X.509 keys are always trusted, else they won't be the keybox.
     // PENDING(marc) check that this ^ is correct
 
     setStatusString(i18n("The key can be used."));
     return true;
 }
 
 static bool checkKeyUsage(const std::vector<GpgME::Key> &keys, unsigned int keyUsage)
 {
     for (auto it = keys.begin(); it != keys.end(); ++it) {
         if (!checkKeyUsage(*it, keyUsage)) {
             return false;
         }
     }
     return true;
 }
 
 static inline QString time_t2string(time_t t)
 {
     return QDateTime::fromSecsSinceEpoch(t).toString();
 }
 
 namespace
 {
 
 class ColumnStrategy : public KeyListView::ColumnStrategy
 {
 public:
     ColumnStrategy(unsigned int keyUsage);
 
     QString title(int col) const override;
     int width(int col, const QFontMetrics &fm) const override;
 
     QString text(const GpgME::Key &key, int col) const override;
     QString accessibleText(const GpgME::Key &key, int column) const override;
     QString toolTip(const GpgME::Key &key, int col) const override;
     QIcon icon(const GpgME::Key &key, int col) const override;
 
 private:
     const QIcon mKeyGoodPix, mKeyBadPix, mKeyUnknownPix, mKeyValidPix;
     const unsigned int mKeyUsage;
 };
 
 static QString iconPath(const QString &name)
 {
     return QStandardPaths::locate(QStandardPaths::GenericDataLocation, QStringLiteral("libkleopatra/pics/") + name + QStringLiteral(".png"));
 }
 
 ColumnStrategy::ColumnStrategy(unsigned int keyUsage)
     : KeyListView::ColumnStrategy()
     , mKeyGoodPix(iconPath(QStringLiteral("key_ok")))
     , mKeyBadPix(iconPath(QStringLiteral("key_bad")))
     , mKeyUnknownPix(iconPath(QStringLiteral("key_unknown")))
     , mKeyValidPix(iconPath(QStringLiteral("key")))
     , mKeyUsage(keyUsage)
 {
     if (keyUsage == 0) {
         qCWarning(KLEO_UI_LOG) << "KeySelectionDialog: keyUsage == 0. You want to use AllKeys instead.";
     }
 }
 
 QString ColumnStrategy::title(int col) const
 {
     switch (col) {
     case 0:
         return i18n("Key ID");
     case 1:
         return i18n("User ID");
     default:
         return QString();
     }
 }
 
 int ColumnStrategy::width(int col, const QFontMetrics &fm) const
 {
     if (col == 0) {
         static const char hexchars[] = "0123456789ABCDEF";
         int maxWidth = 0;
         for (unsigned int i = 0; i < 16; ++i) {
             maxWidth = qMax(fm.boundingRect(QLatin1Char(hexchars[i])).width(), maxWidth);
         }
         return 8 * maxWidth + 2 * 16 /* KIconLoader::SizeSmall */;
     }
     return KeyListView::ColumnStrategy::width(col, fm);
 }
 
 QString ColumnStrategy::text(const GpgME::Key &key, int col) const
 {
     switch (col) {
     case 0: {
         if (key.shortKeyID()) {
             return Formatting::prettyID(key.shortKeyID());
         } else {
             return xi18n("<placeholder>unknown</placeholder>");
         }
     }
     case 1: {
         const char *uid = key.userID(0).id();
         if (key.protocol() == GpgME::OpenPGP) {
             return uid && *uid ? QString::fromUtf8(uid) : QString();
         } else { // CMS
             return DN(uid).prettyDN();
         }
     }
     default:
         return QString();
     }
 }
 
 QString ColumnStrategy::accessibleText(const GpgME::Key &key, int col) const
 {
     switch (col) {
     case 0: {
         if (key.shortKeyID()) {
             return Formatting::accessibleHexID(key.shortKeyID());
         }
+        [[fallthrough]];
     }
     default:
         return {};
     }
 }
 
 QString ColumnStrategy::toolTip(const GpgME::Key &key, int) const
 {
     const char *uid = key.userID(0).id();
     const char *fpr = key.primaryFingerprint();
     const char *issuer = key.issuerName();
     const GpgME::Subkey subkey = key.subkey(0);
     const QString expiry = subkey.neverExpires() ? i18n("never") : time_t2string(subkey.expirationTime());
     const QString creation = time_t2string(subkey.creationTime());
     QString keyStatusString;
     if (!checkKeyUsage(key, mKeyUsage, &keyStatusString)) {
         // Show the status in bold if there is a problem
         keyStatusString = QLatin1String("<b>") % keyStatusString % QLatin1String("</b>");
     }
 
     QString html = QStringLiteral("<qt><p style=\"style='white-space:pre'\">");
     if (key.protocol() == GpgME::OpenPGP) {
         html += i18n("OpenPGP key for <b>%1</b>", uid ? QString::fromUtf8(uid) : i18n("unknown"));
     } else {
         html += i18n("S/MIME key for <b>%1</b>", uid ? DN(uid).prettyDN() : i18n("unknown"));
     }
     html += QStringLiteral("</p><table>");
 
     const auto addRow = [&html](const QString &name, const QString &value) {
         html += QStringLiteral("<tr><td align=\"right\"><b>%1: </b></td><td>%2</td></tr>").arg(name, value);
     };
     addRow(i18nc("Key creation date", "Created"), creation);
     addRow(i18nc("Key Expiration date", "Expiry"), expiry);
     addRow(i18nc("Key fingerprint", "Fingerprint"), fpr ? QString::fromLatin1(fpr) : i18n("unknown"));
     if (key.protocol() != GpgME::OpenPGP) {
         addRow(i18nc("Key issuer", "Issuer"), issuer ? DN(issuer).prettyDN() : i18n("unknown"));
     }
     addRow(i18nc("Key status", "Status"), keyStatusString);
     html += QStringLiteral("</table></qt>");
 
     return html;
 }
 
 QIcon ColumnStrategy::icon(const GpgME::Key &key, int col) const
 {
     if (col != 0) {
         return QIcon();
     }
     // this key did not undergo a validating keylisting yet:
     if (!(key.keyListMode() & GpgME::Validate)) {
         return mKeyUnknownPix;
     }
 
     if (!checkKeyUsage(key, mKeyUsage)) {
         return mKeyBadPix;
     }
 
     if (key.protocol() == GpgME::CMS) {
         return mKeyGoodPix;
     }
 
     switch (key.userID(0).validity()) {
     default:
     case GpgME::UserID::Unknown:
     case GpgME::UserID::Undefined:
         return mKeyUnknownPix;
     case GpgME::UserID::Never:
         return mKeyValidPix;
     case GpgME::UserID::Marginal:
     case GpgME::UserID::Full:
     case GpgME::UserID::Ultimate:
         return mKeyGoodPix;
     }
 }
 
 }
 
 static const int sCheckSelectionDelay = 250;
 
 KeySelectionDialog::KeySelectionDialog(QWidget *parent, Options options)
     : QDialog(parent)
     , mOpenPGPBackend(QGpgME::openpgp())
     , mSMIMEBackend(QGpgME::smime())
     , mKeyUsage(AllKeys)
 {
     qCDebug(KLEO_UI_LOG) << "mTruncated:" << mTruncated << "mSavedOffsetY:" << mSavedOffsetY;
     setUpUI(options, QString());
 }
 
 KeySelectionDialog::KeySelectionDialog(const QString &title,
                                        const QString &text,
                                        const std::vector<GpgME::Key> &selectedKeys,
                                        unsigned int keyUsage,
                                        bool extendedSelection,
                                        bool rememberChoice,
                                        QWidget *parent,
                                        bool modal)
     : QDialog(parent)
     , mSelectedKeys(selectedKeys)
     , mKeyUsage(keyUsage)
 {
     setWindowTitle(title);
     setModal(modal);
     init(rememberChoice, extendedSelection, text, QString());
 }
 
 KeySelectionDialog::KeySelectionDialog(const QString &title,
                                        const QString &text,
                                        const QString &initialQuery,
                                        const std::vector<GpgME::Key> &selectedKeys,
                                        unsigned int keyUsage,
                                        bool extendedSelection,
                                        bool rememberChoice,
                                        QWidget *parent,
                                        bool modal)
     : QDialog(parent)
     , mSelectedKeys(selectedKeys)
     , mKeyUsage(keyUsage)
     , mSearchText(initialQuery)
     , mInitialQuery(initialQuery)
 {
     setWindowTitle(title);
     setModal(modal);
     init(rememberChoice, extendedSelection, text, initialQuery);
 }
 
 KeySelectionDialog::KeySelectionDialog(const QString &title,
                                        const QString &text,
                                        const QString &initialQuery,
                                        unsigned int keyUsage,
                                        bool extendedSelection,
                                        bool rememberChoice,
                                        QWidget *parent,
                                        bool modal)
     : QDialog(parent)
     , mKeyUsage(keyUsage)
     , mSearchText(initialQuery)
     , mInitialQuery(initialQuery)
 {
     setWindowTitle(title);
     setModal(modal);
     init(rememberChoice, extendedSelection, text, initialQuery);
 }
 
 void KeySelectionDialog::setUpUI(Options options, const QString &initialQuery)
 {
     auto mainLayout = new QVBoxLayout(this);
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, this);
     mOkButton = buttonBox->button(QDialogButtonBox::Ok);
     mOkButton->setDefault(true);
     mOkButton->setShortcut(Qt::CTRL | Qt::Key_Return);
 
     mCheckSelectionTimer = new QTimer(this);
     mStartSearchTimer = new QTimer(this);
 
     QFrame *page = new QFrame(this);
     mainLayout->addWidget(page);
     mainLayout->addWidget(buttonBox);
 
     mTopLayout = new QVBoxLayout(page);
     mTopLayout->setContentsMargins(0, 0, 0, 0);
 
     mTextLabel = new QLabel(page);
     mTextLabel->setWordWrap(true);
 
     // Setting the size policy is necessary as a workaround for https://issues.kolab.org/issue4429
     // and http://bugreports.qt.nokia.com/browse/QTBUG-8740
     mTextLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
     connect(mTextLabel, &QLabel::linkActivated, this, &KeySelectionDialog::slotStartCertificateManager);
     mTopLayout->addWidget(mTextLabel);
     mTextLabel->hide();
 
     QPushButton *const searchExternalPB = new QPushButton(i18n("Search for &External Certificates"), page);
     mTopLayout->addWidget(searchExternalPB, 0, Qt::AlignLeft);
     connect(searchExternalPB, &QAbstractButton::clicked, this, &KeySelectionDialog::slotStartSearchForExternalCertificates);
     if (initialQuery.isEmpty()) {
         searchExternalPB->hide();
     }
 
     auto hlay = new QHBoxLayout();
     mTopLayout->addLayout(hlay);
 
     auto le = new QLineEdit(page);
     le->setClearButtonEnabled(true);
     le->setText(initialQuery);
 
     QLabel *lbSearchFor = new QLabel(i18n("&Search for:"), page);
     lbSearchFor->setBuddy(le);
 
     hlay->addWidget(lbSearchFor);
     hlay->addWidget(le, 1);
     le->setFocus();
 
     connect(le, &QLineEdit::textChanged, this, [this](const QString &s) {
         slotSearch(s);
     });
     connect(mStartSearchTimer, &QTimer::timeout, this, &KeySelectionDialog::slotFilter);
 
     mKeyListView = new KeyListView(new ColumnStrategy(mKeyUsage), nullptr, page);
     mKeyListView->setObjectName(QStringLiteral("mKeyListView"));
     mKeyListView->header()->stretchLastSection();
     mKeyListView->setRootIsDecorated(true);
     mKeyListView->setSortingEnabled(true);
     mKeyListView->header()->setSortIndicatorShown(true);
     mKeyListView->header()->setSortIndicator(1, Qt::AscendingOrder); // sort by User ID
     if (options & ExtendedSelection) {
         mKeyListView->setSelectionMode(QAbstractItemView::ExtendedSelection);
     }
     mTopLayout->addWidget(mKeyListView, 10);
 
     if (options & RememberChoice) {
         mRememberCB = new QCheckBox(i18n("&Remember choice"), page);
         mTopLayout->addWidget(mRememberCB);
         mRememberCB->setWhatsThis(
             i18n("<qt><p>If you check this box your choice will "
                  "be stored and you will not be asked again."
                  "</p></qt>"));
     }
 
     connect(mCheckSelectionTimer, &QTimer::timeout, this, [this]() {
         slotCheckSelection();
     });
     connectSignals();
 
     connect(mKeyListView, &KeyListView::doubleClicked, this, &KeySelectionDialog::slotTryOk);
     connect(mKeyListView, &KeyListView::contextMenu, this, &KeySelectionDialog::slotRMB);
 
     if (options & RereadKeys) {
         QPushButton *button = new QPushButton(i18n("&Reread Keys"));
         buttonBox->addButton(button, QDialogButtonBox::ActionRole);
         connect(button, &QPushButton::clicked, this, &KeySelectionDialog::slotRereadKeys);
     }
     if (options & ExternalCertificateManager) {
         QPushButton *button = new QPushButton(i18n("&Start Certificate Manager"));
         buttonBox->addButton(button, QDialogButtonBox::ActionRole);
         connect(button, &QPushButton::clicked, this, [this]() {
             slotStartCertificateManager();
         });
     }
     connect(mOkButton, &QPushButton::clicked, this, &KeySelectionDialog::slotOk);
     connect(buttonBox->button(QDialogButtonBox::Cancel), &QPushButton::clicked, this, &KeySelectionDialog::slotCancel);
 
     mTopLayout->activate();
 
     if (qApp) {
         QSize dialogSize(sizeHint());
         KConfigGroup dialogConfig(KSharedConfig::openStateConfig(), "Key Selection Dialog");
         dialogSize = dialogConfig.readEntry("Dialog size", dialogSize);
         const QByteArray headerState = dialogConfig.readEntry("header", QByteArray());
         if (!headerState.isEmpty()) {
             mKeyListView->header()->restoreState(headerState);
         }
         resize(dialogSize);
     }
 }
 
 void KeySelectionDialog::init(bool rememberChoice, bool extendedSelection, const QString &text, const QString &initialQuery)
 {
     Options options = {RereadKeys, ExternalCertificateManager};
     options.setFlag(ExtendedSelection, extendedSelection);
     options.setFlag(RememberChoice, rememberChoice);
 
     setUpUI(options, initialQuery);
     setText(text);
 
     if (mKeyUsage & OpenPGPKeys) {
         mOpenPGPBackend = QGpgME::openpgp();
     }
     if (mKeyUsage & SMIMEKeys) {
         mSMIMEBackend = QGpgME::smime();
     }
 
     slotRereadKeys();
 }
 
 KeySelectionDialog::~KeySelectionDialog()
 {
     disconnectSignals();
     KConfigGroup dialogConfig(KSharedConfig::openStateConfig(), "Key Selection Dialog");
     dialogConfig.writeEntry("Dialog size", size());
     dialogConfig.writeEntry("header", mKeyListView->header()->saveState());
     dialogConfig.sync();
 }
 
 void KeySelectionDialog::setText(const QString &text)
 {
     mTextLabel->setText(text);
     mTextLabel->setVisible(!text.isEmpty());
 }
 
 void KeySelectionDialog::setKeys(const std::vector<GpgME::Key> &keys)
 {
     for (const GpgME::Key &key : keys) {
         mKeyListView->slotAddKey(key);
     }
 }
 
 void KeySelectionDialog::connectSignals()
 {
     if (mKeyListView->isMultiSelection()) {
         connect(mKeyListView, &QTreeWidget::itemSelectionChanged, this, &KeySelectionDialog::slotSelectionChanged);
     } else {
         connect(mKeyListView,
                 qOverload<KeyListViewItem *>(&KeyListView::selectionChanged),
                 this,
                 qOverload<KeyListViewItem *>(&KeySelectionDialog::slotCheckSelection));
     }
 }
 
 void KeySelectionDialog::disconnectSignals()
 {
     if (mKeyListView->isMultiSelection()) {
         disconnect(mKeyListView, &QTreeWidget::itemSelectionChanged, this, &KeySelectionDialog::slotSelectionChanged);
     } else {
         disconnect(mKeyListView,
                    qOverload<KeyListViewItem *>(&KeyListView::selectionChanged),
                    this,
                    qOverload<KeyListViewItem *>(&KeySelectionDialog::slotCheckSelection));
     }
 }
 
 const GpgME::Key &KeySelectionDialog::selectedKey() const
 {
     static const GpgME::Key null = GpgME::Key::null;
     if (mKeyListView->isMultiSelection() || !mKeyListView->selectedItem()) {
         return null;
     }
     return mKeyListView->selectedItem()->key();
 }
 
 QString KeySelectionDialog::fingerprint() const
 {
     return QLatin1String(selectedKey().primaryFingerprint());
 }
 
 QStringList KeySelectionDialog::fingerprints() const
 {
     QStringList result;
     for (auto it = mSelectedKeys.begin(); it != mSelectedKeys.end(); ++it) {
         if (const char *fpr = it->primaryFingerprint()) {
             result.push_back(QLatin1String(fpr));
         }
     }
     return result;
 }
 
 QStringList KeySelectionDialog::pgpKeyFingerprints() const
 {
     QStringList result;
     for (auto it = mSelectedKeys.begin(); it != mSelectedKeys.end(); ++it) {
         if (it->protocol() == GpgME::OpenPGP) {
             if (const char *fpr = it->primaryFingerprint()) {
                 result.push_back(QLatin1String(fpr));
             }
         }
     }
     return result;
 }
 
 QStringList KeySelectionDialog::smimeFingerprints() const
 {
     QStringList result;
     for (auto it = mSelectedKeys.begin(); it != mSelectedKeys.end(); ++it) {
         if (it->protocol() == GpgME::CMS) {
             if (const char *fpr = it->primaryFingerprint()) {
                 result.push_back(QLatin1String(fpr));
             }
         }
     }
     return result;
 }
 
 void KeySelectionDialog::slotRereadKeys()
 {
     mKeyListView->clear();
     mListJobCount = 0;
     mTruncated = 0;
     mSavedOffsetY = mKeyListView->verticalScrollBar()->value();
 
     disconnectSignals();
     mKeyListView->setEnabled(false);
 
     // FIXME: save current selection
     if (mOpenPGPBackend) {
         startKeyListJobForBackend(mOpenPGPBackend, std::vector<GpgME::Key>(), false /*non-validating*/);
     }
     if (mSMIMEBackend) {
         startKeyListJobForBackend(mSMIMEBackend, std::vector<GpgME::Key>(), false /*non-validating*/);
     }
 
     if (mListJobCount == 0) {
         mKeyListView->setEnabled(true);
         KMessageBox::information(this,
                                  i18n("No backends found for listing keys. "
                                       "Check your installation."),
                                  i18n("Key Listing Failed"));
         connectSignals();
     }
 }
 
 void KeySelectionDialog::slotStartCertificateManager(const QString &query)
 {
     QStringList args;
 
     if (!query.isEmpty()) {
         args << QStringLiteral("--search") << query;
     }
     const QString exec = QStandardPaths::findExecutable(QStringLiteral("kleopatra"));
     if (exec.isEmpty()) {
         qCWarning(KLEO_UI_LOG) << "Could not find kleopatra executable in PATH";
         KMessageBox::error(this,
                            i18n("Could not start certificate manager; "
                                 "please check your installation."),
                            i18n("Certificate Manager Error"));
     } else {
         QProcess::startDetached(QStringLiteral("kleopatra"), args);
         qCDebug(KLEO_UI_LOG) << "\nslotStartCertManager(): certificate manager started.";
     }
 }
 
 #ifndef __KLEO_UI_SHOW_KEY_LIST_ERROR_H__
 #define __KLEO_UI_SHOW_KEY_LIST_ERROR_H__
 static void showKeyListError(QWidget *parent, const GpgME::Error &err)
 {
     Q_ASSERT(err);
     const QString msg = i18n(
         "<qt><p>An error occurred while fetching "
         "the keys from the backend:</p>"
         "<p><b>%1</b></p></qt>",
         QString::fromLocal8Bit(err.asString()));
 
     KMessageBox::error(parent, msg, i18n("Key Listing Failed"));
 }
 #endif // __KLEO_UI_SHOW_KEY_LIST_ERROR_H__
 
 namespace
 {
 struct ExtractFingerprint {
     QString operator()(const GpgME::Key &key)
     {
         return QLatin1String(key.primaryFingerprint());
     }
 };
 }
 
 void KeySelectionDialog::startKeyListJobForBackend(const QGpgME::Protocol *backend, const std::vector<GpgME::Key> &keys, bool validate)
 {
     Q_ASSERT(backend);
     QGpgME::KeyListJob *job = backend->keyListJob(false, false, validate); // local, w/o sigs, validation as given
     if (!job) {
         return;
     }
 
     connect(job, &QGpgME::KeyListJob::result, this, &KeySelectionDialog::slotKeyListResult);
     if (validate) {
         connect(job, &QGpgME::KeyListJob::nextKey, mKeyListView, &KeyListView::slotRefreshKey);
     } else {
         connect(job, &QGpgME::KeyListJob::nextKey, mKeyListView, &KeyListView::slotAddKey);
     }
 
     QStringList fprs;
     std::transform(keys.begin(), keys.end(), std::back_inserter(fprs), ExtractFingerprint());
     const GpgME::Error err = job->start(fprs, mKeyUsage & SecretKeys && !(mKeyUsage & PublicKeys));
 
     if (err) {
         return showKeyListError(this, err);
     }
 
 #ifndef LIBKLEO_NO_PROGRESSDIALOG
     // FIXME: create a MultiProgressDialog:
     (void)new ProgressDialog(job, validate ? i18n("Checking selected keys...") : i18n("Fetching keys..."), this);
 #endif
     ++mListJobCount;
 }
 
 static void selectKeys(KeyListView *klv, const std::vector<GpgME::Key> &selectedKeys)
 {
     klv->clearSelection();
     if (selectedKeys.empty()) {
         return;
     }
     for (auto it = selectedKeys.begin(); it != selectedKeys.end(); ++it) {
         if (KeyListViewItem *item = klv->itemByFingerprint(it->primaryFingerprint())) {
             item->setSelected(true);
         }
     }
 }
 
 void KeySelectionDialog::slotKeyListResult(const GpgME::KeyListResult &res)
 {
     if (res.error()) {
         showKeyListError(this, res.error());
     } else if (res.isTruncated()) {
         ++mTruncated;
     }
 
     if (--mListJobCount > 0) {
         return; // not yet finished...
     }
 
     if (mTruncated > 0) {
         KMessageBox::information(this,
                                  i18np("<qt>One backend returned truncated output.<p>"
                                        "Not all available keys are shown</p></qt>",
                                        "<qt>%1 backends returned truncated output.<p>"
                                        "Not all available keys are shown</p></qt>",
                                        mTruncated),
                                  i18n("Key List Result"));
     }
 
     mKeyListView->flushKeys();
 
     mKeyListView->setEnabled(true);
     mListJobCount = mTruncated = 0;
     mKeysToCheck.clear();
 
     selectKeys(mKeyListView, mSelectedKeys);
 
     slotFilter();
 
     connectSignals();
 
     slotSelectionChanged();
 
     // restore the saved position of the contents
     mKeyListView->verticalScrollBar()->setValue(mSavedOffsetY);
     mSavedOffsetY = 0;
 }
 
 void KeySelectionDialog::slotSelectionChanged()
 {
     qCDebug(KLEO_UI_LOG) << "KeySelectionDialog::slotSelectionChanged()";
 
     // (re)start the check selection timer. Checking the selection is delayed
     // because else drag-selection doesn't work very good (checking key trust
     // is slow).
     mCheckSelectionTimer->start(sCheckSelectionDelay);
 }
 
 namespace
 {
 struct AlreadyChecked {
     bool operator()(const GpgME::Key &key) const
     {
         return key.keyListMode() & GpgME::Validate;
     }
 };
 }
 
 void KeySelectionDialog::slotCheckSelection(KeyListViewItem *item)
 {
     qCDebug(KLEO_UI_LOG) << "KeySelectionDialog::slotCheckSelection()";
 
     mCheckSelectionTimer->stop();
 
     mSelectedKeys.clear();
 
     if (!mKeyListView->isMultiSelection()) {
         if (item) {
             mSelectedKeys.push_back(item->key());
         }
     }
 
     for (KeyListViewItem *it = mKeyListView->firstChild(); it; it = it->nextSibling()) {
         if (it->isSelected()) {
             mSelectedKeys.push_back(it->key());
         }
     }
 
     mKeysToCheck.clear();
     std::remove_copy_if(mSelectedKeys.begin(), mSelectedKeys.end(), std::back_inserter(mKeysToCheck), AlreadyChecked());
     if (mKeysToCheck.empty()) {
         mOkButton->setEnabled(!mSelectedKeys.empty() && checkKeyUsage(mSelectedKeys, mKeyUsage));
         return;
     }
 
     // performed all fast checks - now for validating key listing:
     startValidatingKeyListing();
 }
 
 void KeySelectionDialog::startValidatingKeyListing()
 {
     if (mKeysToCheck.empty()) {
         return;
     }
 
     mListJobCount = 0;
     mTruncated = 0;
     mSavedOffsetY = mKeyListView->verticalScrollBar()->value();
 
     disconnectSignals();
     mKeyListView->setEnabled(false);
 
     std::vector<GpgME::Key> smime;
     std::vector<GpgME::Key> openpgp;
     for (std::vector<GpgME::Key>::const_iterator it = mKeysToCheck.begin(); it != mKeysToCheck.end(); ++it) {
         if (it->protocol() == GpgME::OpenPGP) {
             openpgp.push_back(*it);
         } else {
             smime.push_back(*it);
         }
     }
 
     if (!openpgp.empty()) {
         Q_ASSERT(mOpenPGPBackend);
         startKeyListJobForBackend(mOpenPGPBackend, openpgp, true /*validate*/);
     }
     if (!smime.empty()) {
         Q_ASSERT(mSMIMEBackend);
         startKeyListJobForBackend(mSMIMEBackend, smime, true /*validate*/);
     }
 
     Q_ASSERT(mListJobCount > 0);
 }
 
 bool KeySelectionDialog::rememberSelection() const
 {
     return mRememberCB && mRememberCB->isChecked();
 }
 
 void KeySelectionDialog::slotRMB(KeyListViewItem *item, const QPoint &p)
 {
     if (!item) {
         return;
     }
 
     mCurrentContextMenuItem = item;
 
     QMenu menu;
     menu.addAction(i18n("Recheck Key"), this, &KeySelectionDialog::slotRecheckKey);
     menu.exec(p);
 }
 
 void KeySelectionDialog::slotRecheckKey()
 {
     if (!mCurrentContextMenuItem || mCurrentContextMenuItem->key().isNull()) {
         return;
     }
 
     mKeysToCheck.clear();
     mKeysToCheck.push_back(mCurrentContextMenuItem->key());
 }
 
 void KeySelectionDialog::slotTryOk()
 {
     if (!mSelectedKeys.empty() && checkKeyUsage(mSelectedKeys, mKeyUsage)) {
         slotOk();
     }
 }
 
 void KeySelectionDialog::slotOk()
 {
     if (mCheckSelectionTimer->isActive()) {
         slotCheckSelection();
     }
 #if 0 // Laurent I don't understand why we returns here.
     // button could be disabled again after checking the selected key1
     if (!mSelectedKeys.empty() && checkKeyUsage(mSelectedKeys, mKeyUsage)) {
         return;
     }
 #endif
     mStartSearchTimer->stop();
     accept();
 }
 
 void KeySelectionDialog::slotCancel()
 {
     mCheckSelectionTimer->stop();
     mStartSearchTimer->stop();
     reject();
 }
 
 void KeySelectionDialog::slotSearch(const QString &text)
 {
     mSearchText = text.trimmed().toUpper();
     slotSearch();
 }
 
 void KeySelectionDialog::slotSearch()
 {
     mStartSearchTimer->setSingleShot(true);
     mStartSearchTimer->start(sCheckSelectionDelay);
 }
 
 void KeySelectionDialog::slotFilter()
 {
     if (mSearchText.isEmpty()) {
         showAllItems();
         return;
     }
 
     // OK, so we need to filter:
     QRegExp keyIdRegExp(QLatin1String("(?:0x)?[A-F0-9]{1,8}"), Qt::CaseInsensitive);
     if (keyIdRegExp.exactMatch(mSearchText)) {
         if (mSearchText.startsWith(QLatin1String("0X")))
         // search for keyID only:
         {
             filterByKeyID(mSearchText.mid(2));
         } else
         // search for UID and keyID:
         {
             filterByKeyIDOrUID(mSearchText);
         }
     } else {
         // search in UID:
         filterByUID(mSearchText);
     }
 }
 
 void KeySelectionDialog::filterByKeyID(const QString &keyID)
 {
     Q_ASSERT(keyID.length() <= 8);
     Q_ASSERT(!keyID.isEmpty()); // regexp in slotFilter should prevent these
     if (keyID.isEmpty()) {
         showAllItems();
     } else {
         for (KeyListViewItem *item = mKeyListView->firstChild(); item; item = item->nextSibling()) {
             item->setHidden(!item->text(0).toUpper().startsWith(keyID));
         }
     }
 }
 
 static bool anyUIDMatches(const KeyListViewItem *item, QRegExp &rx)
 {
     if (!item) {
         return false;
     }
 
     const std::vector<GpgME::UserID> uids = item->key().userIDs();
     for (auto it = uids.begin(); it != uids.end(); ++it) {
         if (it->id() && rx.indexIn(QString::fromUtf8(it->id())) >= 0) {
             return true;
         }
     }
     return false;
 }
 
 void KeySelectionDialog::filterByKeyIDOrUID(const QString &str)
 {
     Q_ASSERT(!str.isEmpty());
 
     // match beginnings of words:
     QRegExp rx(QLatin1String("\\b") + QRegExp::escape(str), Qt::CaseInsensitive);
 
     for (KeyListViewItem *item = mKeyListView->firstChild(); item; item = item->nextSibling()) {
         item->setHidden(!item->text(0).toUpper().startsWith(str) && !anyUIDMatches(item, rx));
     }
 }
 
 void KeySelectionDialog::filterByUID(const QString &str)
 {
     Q_ASSERT(!str.isEmpty());
 
     // match beginnings of words:
     QRegExp rx(QLatin1String("\\b") + QRegExp::escape(str), Qt::CaseInsensitive);
 
     for (KeyListViewItem *item = mKeyListView->firstChild(); item; item = item->nextSibling()) {
         item->setHidden(!anyUIDMatches(item, rx));
     }
 }
 
 void KeySelectionDialog::showAllItems()
 {
     for (KeyListViewItem *item = mKeyListView->firstChild(); item; item = item->nextSibling()) {
         item->setHidden(false);
     }
 }