General code clean-up

- Less implicit cast from ASCII
- Use Q_SIGNALS/Q_SLOTS in header files
- Remove a redundant cmake var

applets/kimpanel/backend/ibus/emojier/emojier.cpp

@@ -109,7 +109,7 @@ public:
         QLocale locale;
         QVector<QString> dicts;
         const auto bcp = locale.bcp47Name();
-        const QString dictName = "ibus/dicts/emoji-" + QString(bcp).replace(QLatin1Char('-'), QLatin1Char('_')) + ".dict";
+        const QString dictName = QLatin1String{"ibus/dicts/emoji-"} + QString(bcp).replace(QLatin1Char('-'), QLatin1Char('_')) + QLatin1String{".dict"};
         const QString path = QStandardPaths::locate(QStandardPaths::GenericDataLocation, dictName);
         if (!path.isEmpty()) {
             dicts << path;
@@ -117,7 +117,7 @@ public:
 
         const auto idxSpecific = bcp.indexOf(QLatin1Char('-'));
         if (idxSpecific > 0) {
-            const QString genericDictName = "ibus/dicts/emoji-" + bcp.leftRef(idxSpecific) + ".dict";
+            const QString genericDictName = QLatin1String{"ibus/dicts/emoji-"} + bcp.leftRef(idxSpecific) + QLatin1String{".dict"};
             const QString genericPath = QStandardPaths::locate(QStandardPaths::GenericDataLocation, genericDictName);
 
             if (!genericPath.isEmpty()) {
@@ -126,8 +126,7 @@ public:
         }
 
         if (dicts.isEmpty()) {
-            const QString genericDictName = "ibus/dicts/emoji-en.dict";
-            const QString genericPath = QStandardPaths::locate(QStandardPaths::GenericDataLocation, genericDictName);
+            const QString genericPath = QStandardPaths::locate(QStandardPaths::GenericDataLocation, QStringLiteral("ibus/dicts/emoji-en.dict"));
 
             if (!genericPath.isEmpty()) {
                 dicts << genericPath;
@@ -154,7 +153,7 @@ public:
                 }
 
                 const QString emoji = QString::fromUtf8(ibus_emoji_data_get_emoji(data));
-                const QString description = ibus_emoji_data_get_description(data);
+                const QString description = QString::fromUtf8(ibus_emoji_data_get_description(data));
                 if (description == QString::fromUtf8("↑↑↑") || description.isEmpty() || processedEmoji.contains(emoji)) {
                     continue;
                 }

applets/kimpanel/backend/ibus/ibus15/app.cpp

@@ -189,7 +189,7 @@ App::App(int &argc, char *argv[])
 
     initIconMap(m_iconMap);
     m_watcher->setConnection(QDBusConnection::sessionBus());
-    m_watcher->addWatchedService("org.kde.impanel");
+    m_watcher->addWatchedService(QStringLiteral("org.kde.impanel"));
     init();
 }
 

applets/kimpanel/backend/ibus/ibus15/panel.cpp

@@ -367,8 +367,8 @@ static void impanel_get_default_engine(IBusPanelImpanel *impanel, char ***pengin
 
     QList<QByteArray> engineList;
     impanel->xkbLayoutManager->getLayout();
-    QStringList layouts = impanel->xkbLayoutManager->defaultLayout().split(',');
-    QStringList variants = impanel->xkbLayoutManager->defaultVariant().split(',');
+    QStringList layouts = impanel->xkbLayoutManager->defaultLayout().split(QLatin1Char{','});
+    QStringList variants = impanel->xkbLayoutManager->defaultVariant().split(QLatin1Char{','});
 
     for (int i = 0; i < layouts.size(); i++) {
         QString variant;
@@ -393,8 +393,8 @@ static void impanel_get_default_engine(IBusPanelImpanel *impanel, char ***pengin
         locale = "C";
     }
 
-    QStringList localeList = QString(locale).split('.');
-    QString lang = localeList.size() > 0 ? localeList[0] : "";
+    QStringList localeList = QString::fromLocal8Bit(locale).split(QLatin1Char{'.'});
+    const QString lang = localeList.size() > 0 ? localeList.at(0) : QString{};
 
     bool added = false;
     for (GList *engine = g_list_first(engines); engine != nullptr; engine = g_list_next(engine)) {
@@ -411,8 +411,8 @@ static void impanel_get_default_engine(IBusPanelImpanel *impanel, char ***pengin
     }
 
     if (!added) {
-        localeList = QString(lang).split('_');
-        QString lang = localeList.size() > 0 ? localeList[0] : "";
+        localeList = QString(lang).split(QLatin1Char{'_'});
+        QString _lang = localeList.size() > 0 ? localeList.at(0) : QString{};
 
         for (GList *engine = g_list_first(engines); engine != nullptr; engine = g_list_next(engine)) {
             IBusEngineDesc *desc = IBUS_ENGINE_DESC(engine->data);
@@ -421,7 +421,7 @@ static void impanel_get_default_engine(IBusPanelImpanel *impanel, char ***pengin
                 continue;
             }
 
-            if (QLatin1String(ibus_engine_desc_get_language(desc)) == lang && ibus_engine_desc_get_rank(desc) > 0) {
+            if (QLatin1String(ibus_engine_desc_get_language(desc)) == _lang && ibus_engine_desc_get_rank(desc) > 0) {
                 engineList << name;
             }
         }

applets/kimpanel/backend/ibus/ibus15/xkblayoutmanager.cpp

@@ -44,7 +44,7 @@ void XkbLayoutManager::setLatinLayouts(const gchar **variants, gsize length)
 void XkbLayoutManager::getLayout()
 {
     QProcess process;
-    process.start(XKB_COMMAND, QStringList(XKB_QUERY_ARG));
+    process.start(QString::fromLatin1(XKB_COMMAND), QStringList(QString::fromLatin1(XKB_QUERY_ARG)));
     process.waitForFinished();
     QByteArray output = process.readAllStandardOutput();
     QList<QByteArray> lines = output.split('\n');
@@ -76,63 +76,65 @@ void XkbLayoutManager::setLayout(IBusEngineDesc *desc)
     QString variant = QString::fromUtf8(cvariant ? cvariant : "");
     QString option = QString::fromUtf8(coption ? coption : "");
 
-    if (layout == "default" && (variant == "default" || variant == "") && (option == "default" || option == "")) {
+    if (layout == QLatin1String{"default"}
+        && (variant.isEmpty() || variant == QLatin1String{"default"})
+        && (option.isEmpty() && option == QLatin1String{"default"})) {
         return;
     }
 
     bool need_us_layout = false;
-    if (variant != "eng") {
+    if (variant != QLatin1String{"eng"}) {
         need_us_layout = m_latinLayouts.contains(layout);
     }
-    if (!need_us_layout && variant != "") {
-        need_us_layout = m_latinLayouts.contains(QString("%1(%2)").arg(layout, variant));
+    if (!variant.isEmpty() && !need_us_layout) {
+        need_us_layout = m_latinLayouts.contains(QLatin1String("%1(%2)").arg(layout, variant));
     }
 
-    if (m_defaultLayout == "") {
+    if (m_defaultLayout.isEmpty()) {
         getLayout();
     }
 
-    if (layout == "default" || layout == "") {
+    if (layout.isEmpty() || layout == QLatin1String{"default"}) {
         layout = m_defaultLayout;
         variant = m_defaultVariant;
     }
 
-    if (layout == "") {
+    if (layout.isEmpty()) {
         g_warning("Could not get the correct layout");
         return;
     }
 
-    if (option == "default" || option == "") {
+    if (option.isEmpty() || option == QLatin1String{"default"}) {
         option = m_defaultOption;
     } else {
-        if (!(m_defaultOption.split(",").contains(option))) {
-            option = QString("%1,%2").arg(m_defaultOption, option);
+        if (!(m_defaultOption.split(QLatin1Char{','}).contains(option))) {
+            option = QLatin1String("%1,%2").arg(m_defaultOption, option);
         } else {
             option = m_defaultOption;
         }
     }
 
     if (need_us_layout) {
-        layout += ",us";
-        if (variant != "") {
-            variant += ",";
+        layout += QLatin1String{",us"};
+        if (!variant.isEmpty()) {
+            variant += QLatin1Char{','};
         }
     }
 
     QStringList args;
-    args << XKB_LAYOUT_ARG;
+    args << QString::fromLatin1(XKB_LAYOUT_ARG);
     args << layout;
-    if (variant != "" && variant != "default") {
-        args << "-variant";
+    if (!variant.isEmpty() && variant != QLatin1String("default")) {
+        args << QStringLiteral("-variant");
         args << variant;
     }
-    if (option != "" && option != "default") {
+    if (!option.isEmpty() && option != QLatin1String("default")) {
         /*TODO: Need to get the session XKB options */
-        args << "-option";
+        args << QStringLiteral("-option");
         args << option;
     }
 
-    int exit_status = QProcess::execute(XKB_COMMAND, args);
+    int exit_status = QProcess::execute(QString::fromLatin1(XKB_COMMAND), args);
 
     if (exit_status != 0) {
         g_warning("Execute setxkbmap failed.");
@@ -149,8 +151,8 @@ void XkbLayoutManager::runXmodmap()
 
     QDir home = QDir::home();
     for (size_t i = 0; i < sizeof(XMODMAP_KNOWN_FILES) / sizeof(XMODMAP_KNOWN_FILES[0]); i++) {
-        if (home.exists(XMODMAP_KNOWN_FILES[i])) {
-            QProcess::startDetached(XMODMAP_COMMAND, QStringList(home.filePath(XMODMAP_KNOWN_FILES[i])));
+        if (home.exists(QString::fromLatin1(XMODMAP_KNOWN_FILES[i]))) {
+            QProcess::startDetached(QString::fromLatin1(XMODMAP_COMMAND), QStringList{home.filePath(QString::fromLatin1(XMODMAP_KNOWN_FILES[i]))});
             break;
         }
     }

applets/kimpanel/backend/ibus/launcher.cpp

@@ -47,30 +47,35 @@ public Q_SLOTS:
         // Check if applet is still there.
         connect(m_watcher, &QDBusServiceWatcher::serviceUnregistered, this, &IBusPanelLauncher::serviceUnregistered);
         connect(m_watcher, &QDBusServiceWatcher::serviceRegistered, this, &IBusPanelLauncher::serviceRegistered);
-        m_watcher->addWatchedService("org.kde.impanel");
-        m_watcher->addWatchedService("org.freedesktop.IBus");
+        m_watcher->addWatchedService(QStringLiteral("org.kde.impanel"));
+        m_watcher->addWatchedService(QStringLiteral("org.freedesktop.IBus"));
 
         // check if panel is already created
-        QDBusConnection::sessionBus().connect("org.kde.impanel", "/org/kde/impanel", "org.kde.impanel2", "PanelRegistered", this, SLOT(quit()));
-        if (!QDBusConnection::sessionBus().interface()->isServiceRegistered("org.kde.impanel")) {
+        QDBusConnection::sessionBus().connect(QStringLiteral("org.kde.impanel"),
+                                              QStringLiteral("/org/kde/impanel"),
+                                              QStringLiteral("org.kde.impanel2"),
+                                              QStringLiteral("PanelRegistered"),
+                                              this,
+                                              SLOT(quit()));
+        if (!QDBusConnection::sessionBus().interface()->isServiceRegistered(QStringLiteral("org.kde.impanel"))) {
             quit();
             return;
         }
-        if (QDBusConnection::sessionBus().interface()->isServiceRegistered("org.freedesktop.IBus")) {
-            serviceRegistered("org.freedesktop.IBus");
+        if (QDBusConnection::sessionBus().interface()->isServiceRegistered(QStringLiteral("org.freedesktop.IBus"))) {
+            serviceRegistered(QStringLiteral("org.freedesktop.IBus"));
         }
     }
 
     void serviceRegistered(const QString &service)
     {
-        if (service == "org.freedesktop.IBus") {
+        if (service == QLatin1String{"org.freedesktop.IBus"}) {
             launchIBusPanel();
         }
     }
 
     void serviceUnregistered(const QString &service)
     {
-        if (service == "org.kde.impanel") {
+        if (service == QLatin1String{"org.kde.impanel"}) {
             quit();
         }
     }

applets/kimpanel/plugin/kimpanel.cpp

@@ -141,7 +141,7 @@ void Kimpanel::updateLookupTableFull(const KimpanelLookupTable &lookupTable, int
 void Kimpanel::updateProperty(const KimpanelProperty &property)
 {
     for (auto &prop : m_props) {
-        if (prop.toMap()["key"] == property.key) {
+        if (prop.toMap()[QStringLiteral("key")] == property.key) {
             prop = property.toMap();
             emit propertiesChanged();
             break;

applets/kimpanel/plugin/kimpanel.h

@@ -60,7 +60,7 @@ public:
     Q_INVOKABLE void configure();
     Q_INVOKABLE void exit();
 
-signals:
+Q_SIGNALS:
     void auxTextChanged();
     void preeditTextChanged();
     void lookupTableChanged();
@@ -68,7 +68,7 @@ signals:
     void propertiesChanged();
     void menuTriggered(const QVariantList &props);
 
-private slots:
+private Q_SLOTS:
     void updatePreeditText(const QString &text, const QList<TextAttribute> &attrList);
     void updateAux(const QString &text, const QList<TextAttribute> &attrList);
     void updatePreeditCaret(int pos);

applets/taskmanager/plugin/smartlaunchers/smartlauncherbackend.h

@@ -63,7 +63,7 @@ public:
 
     QHash<QString, QString> unityMappingRules() const;
 
-signals:
+Q_SIGNALS:
     void countChanged(const QString &uri, int count);
     void countVisibleChanged(const QString &uri, bool countVisible);
     void progressChanged(const QString &uri, int progress);
@@ -73,7 +73,7 @@ signals:
     void reloadRequested(const QString &uri);
     void launcherRemoved(const QString &uri);
 
-private slots:
+private Q_SLOTS:
     void update(const QString &uri, const QMap<QString, QVariant> &properties);
 
 private:

applets/taskmanager/plugin/smartlaunchers/smartlauncheritem.h

@@ -54,7 +54,7 @@ public:
     bool progressVisible() const;
     bool urgent() const;
 
-signals:
+Q_SIGNALS:
     void launcherUrlChanged(const QUrl &launcherUrl);
 
     void countChanged(int count);

attica-kde/kdeplugin/kdeplatformdependent.cpp

@@ -67,7 +67,7 @@ QString KdePlatformDependent::getAccessToken(const QUrl & /*baseUrl*/) const
     QString idToken;
     Accounts::Manager *accountsManager = KAccounts::accountsManager();
     if (accountsManager) {
-        static const QString serviceType{"opendesktop-rating"};
+        static const QString serviceType{QStringLiteral("opendesktop-rating")};
         Accounts::AccountIdList accountIds = accountsManager->accountList(serviceType);
         // TODO Present the user with a choice in case there's more than one, but for now just pick the first successful one
         // loop through the accounts, and attempt to get them
@@ -81,8 +81,8 @@ QString KdePlatformDependent::getAccessToken(const QUrl & /*baseUrl*/) const
                 connect(job, &KJob::finished, [&completed, &accessToken, &idToken](KJob *kjob) {
                     GetCredentialsJob *job = qobject_cast<GetCredentialsJob *>(kjob);
                     QVariantMap credentialsData = job->credentialsData();
-                    accessToken = credentialsData["AccessToken"].toString();
-                    idToken = credentialsData["IdToken"].toString();
+                    accessToken = credentialsData[QStringLiteral("AccessToken")].toString();
+                    idToken = credentialsData[QStringLiteral("IdToken")].toString();
                     // As this can be useful for more heavy duty debugging purposes, leaving this in so it doesn't have to be rewritten
                     //                     if (!accessToken.isEmpty()) {
                     //                         qCDebug(ATTICA_PLUGIN_LOG) << "Credentials data was retrieved";
@@ -122,7 +122,7 @@ QString KdePlatformDependent::getAccessToken(const QUrl & /*baseUrl*/) const
 QUrl baseUrlFromRequest(const QNetworkRequest &request)
 {
     const QUrl url{request.url()};
-    QString baseUrl = QString("%1://%2").arg(url.scheme()).arg(url.host());
+    QString baseUrl = QLatin1String("%1://%2").arg(url.scheme(), url.host());
     int port = url.port();
     if (port != -1) {
         baseUrl.append(QString::number(port));

config-workspace.h.cmake

-/* config-workspace.h.  Generated by cmake from config-workspace.h.cmake  */
-
-#cmakedefine HAVE_QIMAGEBLITZ
-
 /* Define if you have DPMS support */
 #cmakedefine HAVE_DPMS 1
 

containments/desktop/plugins/folder/autotests/foldermodeltest.cpp

@@ -41,7 +41,7 @@ void FolderModelTest::createTestFolder(const QString &path)
     QDir dir(m_folderDir->path());
     dir.mkdir(path);
     dir.cd(path);
-    dir.mkdir("firstDir");
+    dir.mkdir(QStringLiteral("firstDir"));
     QFile f;
     for (int i = 1; i < 10; i++) {
         f.setFileName(QStringLiteral("%1/file%2.txt").arg(dir.path(), QString::number(i)));
@@ -109,8 +109,8 @@ void FolderModelTest::tst_listingFolderNotFirst()
 void FolderModelTest::tst_filterListing()
 {
     // a little bit weird API, as both pattern and mimetype needs to be set
-    m_folderModel->setFilterPattern("*.txt");
-    m_folderModel->setFilterMimeTypes({"all/all"});
+    m_folderModel->setFilterPattern(QStringLiteral("*.txt"));
+    m_folderModel->setFilterMimeTypes(QStringList{QStringLiteral("all/all")});
     m_folderModel->setFilterMode(FolderModel::FilterShowMatches);
     const auto count = m_folderModel->rowCount();
     QCOMPARE(count, 9);
@@ -326,12 +326,12 @@ void FolderModelTest::tst_multiScreen()
     // create a new item, it appears on the first screen
     QDir dir(m_folderDir->path());
     dir.cd(desktop);
-    dir.mkdir("secondDir");
-    dir.cd("secondDir");
+    dir.mkdir(QStringLiteral("secondDir"));
+    dir.cd(QStringLiteral("secondDir"));
     s.wait(1000);
     QCOMPARE(m_folderModel->rowCount(), count);
     QCOMPARE(secondFolderModel.rowCount(), 1);
-    QCOMPARE(screenMapper->screenForItem(stringToUrl("file://" + dir.path())), 0);
+    QCOMPARE(screenMapper->screenForItem(stringToUrl(QLatin1String("file://") + dir.path())), 0);
 }
 
 void FolderModelTest::tst_multiScreenDifferenPath()
@@ -357,14 +357,14 @@ void FolderModelTest::tst_multiScreenDifferenPath()
     // create a new item, it appears on the first screen
     QDir dir(m_folderDir->path());
     dir.cd(desktop);
-    dir.mkdir("secondDir");
+    dir.mkdir(QStringLiteral("secondDir"));
     s.wait(1000);
     QCOMPARE(m_folderModel->rowCount(), count + 1);
     QCOMPARE(secondFolderModel.rowCount(), count2);
 
     // create a new item, it appears on the second screen
     dir.cd(m_folderDir->path() + QDir::separator() + desktop2);
-    dir.mkdir("secondDir2");
+    dir.mkdir(QStringLiteral("secondDir2"));
     s.wait(1000);
     QCOMPARE(m_folderModel->rowCount(), count + 1);
     QCOMPARE(secondFolderModel.rowCount(), count2 + 1);

containments/desktop/plugins/folder/autotests/positionertest.cpp

@@ -40,7 +40,7 @@ void PositionerTest::initTestCase()
     QDir dir(m_folderDir->path());
     dir.mkdir(desktop);
     dir.cd(desktop);
-    dir.mkdir("firstDir");
+    dir.mkdir(QStringLiteral("firstDir"));
     QFile f;
     for (int i = 1; i < 10; i++) {
         f.setFileName(QStringLiteral("%1/file%2.txt").arg(dir.path(), QString::number(i)));

containments/desktop/plugins/folder/autotests/screenmappertest.cpp

@@ -77,7 +77,7 @@ void ScreenMapperTest::tst_addMapping()
     const auto path = ScreenMapper::stringToUrl(QStringLiteral("desktop:/"));
     addScreens(path);
     QSignalSpy s(m_screenMapper, &ScreenMapper::screenMappingChanged);
-    QString file("desktop:/foo%1.txt");
+    QString file(QStringLiteral("desktop:/foo%1.txt"));
 
     for (int i = 0; i < 3; i++) {
         const QUrl url = ScreenMapper::stringToUrl(file.arg(i));
@@ -91,7 +91,7 @@ void ScreenMapperTest::tst_addRemoveScreenWithItems()
 {
     const auto path = ScreenMapper::stringToUrl(QStringLiteral("desktop:/"));
     addScreens(path);
-    QString file("desktop:/foo%1.txt");
+    QString file(QStringLiteral("desktop:/foo%1.txt"));
 
     for (int i = 0; i < 3; i++) {
         const QUrl url = ScreenMapper::stringToUrl(file.arg(i));

containments/desktop/plugins/folder/foldermodel.cpp

@@ -1040,6 +1040,25 @@ static bool isDropBetweenSharedViews(const QList<QUrl> &urls, const QUrl &folder
     return true;
 }
 
+static const char *s_ark_dndextract_service = "application/x-kde-ark-dndextract-service";
+static const char *s_ark_dndextract_path = "application/x-kde-ark-dndextract-path";
+
+static QString arkDbusServiceName(const QMimeData *mimeData)
+{
+    return QString::fromUtf8(mimeData->data(QString::fromLatin1(s_ark_dndextract_service)));
+}
+
+static QString arkDbusPath(const QMimeData *mimeData)
+{
+    return QString::fromUtf8(mimeData->data(QString::fromLatin1(s_ark_dndextract_path)));
+}
+
+static bool isMimeDataArkDnd(const QMimeData *mimeData)
+{
+    return mimeData->hasFormat(QString::fromLatin1(s_ark_dndextract_service)) //
+        && mimeData->hasFormat(QString::fromLatin1(s_ark_dndextract_path));
+}
+
 void FolderModel::drop(QQuickItem *target, QObject *dropEvent, int row, bool showMenuManually)
 {
     QMimeData *mimeData = qobject_cast<QMimeData *>(dropEvent->property("mimeData").value<QObject *>());
@@ -1122,13 +1141,9 @@ void FolderModel::drop(QQuickItem *target, QObject *dropEvent, int row, bool sho
         return;
     }
 
-    if (mimeData->hasFormat(QStringLiteral("application/x-kde-ark-dndextract-service"))
-        && mimeData->hasFormat(QStringLiteral("application/x-kde-ark-dndextract-path"))) {
-        const QString remoteDBusClient = mimeData->data(QStringLiteral("application/x-kde-ark-dndextract-service"));
-        const QString remoteDBusPath = mimeData->data(QStringLiteral("application/x-kde-ark-dndextract-path"));
-
-        QDBusMessage message = QDBusMessage::createMethodCall(remoteDBusClient,
-                                                              remoteDBusPath,
+    if (isMimeDataArkDnd(mimeData)) {
+        QDBusMessage message = QDBusMessage::createMethodCall(arkDbusServiceName(mimeData),
+                                                              arkDbusPath(mimeData),
                                                               QStringLiteral("org.kde.ark.DndExtract"),
                                                               QStringLiteral("extractSelectedFilesTo"));
         message.setArguments({dropTargetUrl.toDisplayString(QUrl::PreferLocalFile)});
@@ -1238,13 +1253,9 @@ void FolderModel::dropCwd(QObject *dropEvent)
         return;
     }
 
-    if (mimeData->hasFormat(QStringLiteral("application/x-kde-ark-dndextract-service"))
-        && mimeData->hasFormat(QStringLiteral("application/x-kde-ark-dndextract-path"))) {
-        const QString remoteDBusClient = mimeData->data(QStringLiteral("application/x-kde-ark-dndextract-service"));
-        const QString remoteDBusPath = mimeData->data(QStringLiteral("application/x-kde-ark-dndextract-path"));
-
-        QDBusMessage message = QDBusMessage::createMethodCall(remoteDBusClient,
-                                                              remoteDBusPath,
+    if (isMimeDataArkDnd(mimeData)) {
+        QDBusMessage message = QDBusMessage::createMethodCall(arkDbusServiceName(mimeData),
+                                                              arkDbusPath(mimeData),
                                                               QStringLiteral("org.kde.ark.DndExtract"),
                                                               QStringLiteral("extractSelectedFilesTo"));
         message.setArguments(QVariantList() << m_dirModel->dirLister()->url().adjusted(QUrl::PreferLocalFile).toString());

imports/activitymanager/sortedactivitiesmodel.cpp

@@ -39,7 +39,7 @@
 #include <KWindowSystem>
 #include <QX11Info>
 
-#define PLASMACONFIG "plasma-org.kde.plasma.desktop-appletsrc"
+static const char *s_plasma_config = "plasma-org.kde.plasma.desktop-appletsrc";
 
 namespace
 {
@@ -48,11 +48,11 @@ class BackgroundCache : public QObject
 public:
     BackgroundCache()
         : initialized(false)
-        , plasmaConfig(KSharedConfig::openConfig(PLASMACONFIG))
+        , plasmaConfig(KSharedConfig::openConfig(QString::fromLatin1(s_plasma_config)))
     {
         using namespace std::placeholders;
 
-        const QString configFile = QStandardPaths::writableLocation(QStandardPaths::GenericConfigLocation) + QLatin1Char('/') + PLASMACONFIG;
+        const QString configFile = QStandardPaths::writableLocation(QStandardPaths::GenericConfigLocation) + QLatin1Char{'/'} + QLatin1String{s_plasma_config};
 
         KDirWatch::self()->addFile(configFile);
 
@@ -62,7 +62,7 @@ public:
 
     void settingsFileChanged(const QString &file)
     {
-        if (!file.endsWith(PLASMACONFIG)) {
+        if (!file.endsWith(QLatin1String{s_plasma_config})) {
             return;
         }
 
@@ -146,7 +146,7 @@ public:
             //          << "last screen is" << lastScreen
             //          ;
 
-            if (processed && newForActivity[activity][0] != '#')
+            if (processed && newForActivity[activity][0] != QLatin1Char{'#'})
                 continue;
 
             // Marking the current activity as processed
@@ -233,7 +233,7 @@ SortedActivitiesModel::SortedActivitiesModel(const QVector<KActivities::Info::St
         KWindowInfo info(window, NET::WMVisibleName, NET::WM2Activities);
         const QStringList activities = info.activities();
 
-        if (activities.isEmpty() || activities.contains("00000000-0000-0000-0000-000000000000"))
+        if (activities.isEmpty() || activities.contains(QLatin1String{"00000000-0000-0000-0000-000000000000"}))
             continue;
 
         for (const auto &activity : activities) {
@@ -275,7 +275,7 @@ uint SortedActivitiesModel::lastUsedTime(const QString &activity) const
         return ~(uint)0;
 
     } else {
-        KConfig config("kactivitymanagerd-switcher", KConfig::SimpleConfig);
+        KConfig config(QStringLiteral("kactivitymanagerd-switcher"), KConfig::SimpleConfig);
         KConfigGroup times(&config, "LastUsed");
 
         return times.readEntry(activity, (uint)0);
@@ -444,7 +444,7 @@ void SortedActivitiesModel::onWindowAdded(WId window)
     KWindowInfo info(window, NET::Properties(), NET::WM2Activities);
     const QStringList activities = info.activities();
 
-    if (activities.isEmpty() || activities.contains("00000000-0000-0000-0000-000000000000"))
+    if (activities.isEmpty() || activities.contains(QLatin1String{"00000000-0000-0000-0000-000000000000"}))
         return;
 
     for (const auto &activity : activities) {

imports/activitymanager/switcherbackend.cpp

@@ -49,8 +49,8 @@
 #include <X11/keysym.h>
 #include <X11/keysymdef.h>
 
-#define ACTION_NAME_NEXT_ACTIVITY "next activity"
-#define ACTION_NAME_PREVIOUS_ACTIVITY "previous activity"
+static const char *s_action_name_next_activity = "next activity";
+static const char *s_action_name_previous_activity = "previous activity";
 
 namespace
 {
@@ -251,9 +251,9 @@ SwitcherBackend::SwitcherBackend(QObject *parent)
     , m_runningActivitiesModel(new SortedActivitiesModel({KActivities::Info::Running, KActivities::Info::Stopping}, this))
     , m_stoppedActivitiesModel(new SortedActivitiesModel({KActivities::Info::Stopped, KActivities::Info::Starting}, this))
 {
-    registerShortcut(ACTION_NAME_NEXT_ACTIVITY, i18n("Walk through activities"), Qt::META | Qt::Key_Tab, &SwitcherBackend::keybdSwitchToNextActivity);
+    registerShortcut(QString::fromLatin1(s_action_name_next_activity), i18n("Walk through activities"), Qt::META | Qt::Key_Tab, &SwitcherBackend::keybdSwitchToNextActivity);
 
-    registerShortcut(ACTION_NAME_PREVIOUS_ACTIVITY,
+    registerShortcut(QString::fromLatin1(s_action_name_previous_activity),
                      i18n("Walk through activities (Reverse)"),
                      Qt::META | Qt::SHIFT | Qt::Key_Tab,
                      &SwitcherBackend::keybdSwitchToPreviousActivity);
@@ -280,7 +280,7 @@ SwitcherBackend::~SwitcherBackend()
 QObject *SwitcherBackend::instance(QQmlEngine *engine, QJSEngine *scriptEngine)
 {
     Q_UNUSED(scriptEngine)
-    engine->addImageProvider("wallpaperthumbnail", new ThumbnailImageProvider());
+    engine->addImageProvider(QStringLiteral("wallpaperthumbnail"), new ThumbnailImageProvider());
     return new SwitcherBackend();
 }
 
@@ -289,7 +289,7 @@ void SwitcherBackend::keybdSwitchToNextActivity()