remove Qt < 5.12 code as Qt 5.12 is now minimal req. version

src/librssguard/core/feedsproxymodel.cpp

@@ -18,14 +18,9 @@ FeedsProxyModel::FeedsProxyModel(FeedsModel* source_model, QObject* parent)
 
   setSortRole(Qt::ItemDataRole::EditRole);
   setSortCaseSensitivity(Qt::CaseSensitivity::CaseInsensitive);
-
-#if QT_VERSION >= 0x050A00 // Qt >= 5.10.0
   setRecursiveFilteringEnabled(true);
-#endif
-
   setFilterKeyColumn(FDS_MODEL_TITLE_INDEX);
   setFilterRole(LOWER_TITLE_ROLE);
-
   setDynamicSortFilter(true);
   setSourceModel(m_sourceModel);
 

src/librssguard/gui/feedsview.cpp

@@ -532,11 +532,7 @@ void FeedsView::filterItems(const QString& pattern) {
     m_dontSaveExpandState = false;
   }
 
-#if QT_VERSION < 0x050C00 // Qt < 5.12.0
-  m_proxyModel->setFilterRegExp(pattern.toLower());
-#else
   m_proxyModel->setFilterRegularExpression(pattern.toLower());
-#endif
 
   if (pattern.isEmpty()) {
     loadAllExpandStates();

src/librssguard/gui/messagesview.cpp

@@ -380,7 +380,6 @@ void MessagesView::initializeContextMenu() {
       << qApp->mainForm()->m_ui->m_actionSwitchImportanceOfSelectedMessages
       << qApp->mainForm()->m_ui->m_actionDeleteSelectedMessages);
 
-
   if (m_sourceModel->loadedItem() != nullptr) {
     if (m_sourceModel->loadedItem()->kind() == RootItem::Kind::Bin) {
       m_contextMenu->addAction(qApp->mainForm()->m_ui->m_actionRestoreSelectedMessages);
@@ -771,11 +770,7 @@ void MessagesView::searchMessages(const QString& pattern) {
            << "Running search of messages with pattern"
            << QUOTE_W_SPACE_DOT(pattern);
 
-#if QT_VERSION < 0x050C00 // Qt < 5.12.0
-  m_proxyModel->setFilterRegExp(pattern.toLower());
-#else
   m_proxyModel->setFilterRegularExpression(pattern.toLower());
-#endif
 
   if (selectionModel()->selectedRows().isEmpty()) {
     emit currentMessageRemoved();

src/librssguard/gui/reusable/squeezelabel.cpp

@@ -9,11 +9,7 @@ void SqueezeLabel::paintEvent(QPaintEvent* event) {
     m_squeezedTextCache = text();
     QFontMetrics fm = fontMetrics();
 
-#if QT_VERSION >= 0x050B00 // Qt >= 5.11.0
     if (fm.horizontalAdvance(m_squeezedTextCache) > contentsRect().width()) {
-#else
-    if (fm.width(m_squeezedTextCache) > contentsRect().width()) {
-#endif
       setText(fm.elidedText(text(), Qt::ElideMiddle, width()));
     }
   }

src/librssguard/miscellaneous/textfactory.cpp

@@ -53,11 +53,7 @@ int TextFactory::stringWidth(const QString& string, const QFontMetrics& metrics)
   int width = 0;
 
   for (const QString& line : lines) {
-#if QT_VERSION >= 0x050B00 // Qt >= 5.11.0
     int line_width = metrics.horizontalAdvance(line);
-#else
-    int line_width = metrics.width(line);
-#endif
 
     if (line_width > width) {
       width = line_width;

src/librssguard/network-web/webfactory.cpp

@@ -317,20 +317,12 @@ void WebFactory::createMenu(QMenu* menu) {
   actions << createEngineSettingsAction(tr("Allow geolocation on insecure origins"), QWebEngineSettings::WebAttribute::AllowGeolocationOnInsecureOrigins);
 #endif
 
-#if QT_VERSION >= 0x050A00 // Qt >= 5.10.0
   actions << createEngineSettingsAction(tr("JS can activate windows"), QWebEngineSettings::WebAttribute::AllowWindowActivationFromJavaScript);
   actions << createEngineSettingsAction(tr("Show scrollbars"), QWebEngineSettings::WebAttribute::ShowScrollBars);
-#endif
-
-#if QT_VERSION >= 0x050B00 // Qt >= 5.11.0
   actions << createEngineSettingsAction(tr("Media playback with gestures"), QWebEngineSettings::WebAttribute::PlaybackRequiresUserGesture);
   actions << createEngineSettingsAction(tr("WebRTC uses only public interfaces"), QWebEngineSettings::WebAttribute::WebRTCPublicInterfacesOnly);
   actions << createEngineSettingsAction(tr("JS can paste from clipboard"), QWebEngineSettings::WebAttribute::JavascriptCanPaste);
-#endif
-
-#if QT_VERSION >= 0x050C00 // Qt >= 5.12.0
   actions << createEngineSettingsAction(tr("DNS prefetch enabled"), QWebEngineSettings::WebAttribute::DnsPrefetchEnabled);
-#endif
 
 #if QT_VERSION >= 0x050D00 // Qt >= 5.13.0
   actions << createEngineSettingsAction(tr("PDF viewer enabled"), QWebEngineSettings::WebAttribute::PdfViewerEnabled);