Drop support for KF5 older than 5.56

CMakeLists.txt

@@ -36,7 +36,7 @@ if(Qt5_FOUND AND NOT TARGET Qt::Core)
     endforeach()
 endif()
 
-find_package(KF${QT_VERSION_MAJOR}SyntaxHighlighting REQUIRED)
+find_package(KF${QT_VERSION_MAJOR}SyntaxHighlighting 5.56 REQUIRED)
 set_package_properties(KF${QT_VERSION_MAJOR}SyntaxHighlighting PROPERTIES
     URL "https://community.kde.org/Frameworks"
     DESCRIPTION "Syntax Highlighting framework for Qt${QT_VERSION_MAJOR}"

lib/CMakeLists.txt

@@ -16,7 +16,6 @@
 add_library(syntaxtextedit "")
 target_sources(syntaxtextedit
     PRIVATE
-        kf_version.h
         syntaxhighlighter.h
         syntaxhighlighter.cpp
         syntaxtextedit.h

src/aboutdialog.cpp

@@ -22,10 +22,10 @@
 #include <QDialogButtonBox>
 #include <QGridLayout>
 #include <QMessageBox>
+#include <ksyntaxhighlighting_version.h>
 
 #include "appversion.h"
 #include "charsets.h"
-#include "kf_version.h"
 
 AboutDialog::AboutDialog(QWidget *parent)
     : QDialog(parent)
@@ -78,7 +78,13 @@ AboutDialog::AboutDialog(QWidget *parent)
         "<li>Oxygen Icons</li>"
         "</ul>")
         .arg(QString::fromLatin1(qVersion()),
+#if defined(KSYNTAXHIGHLIGHTING_VERSION)
              QStringLiteral(KSYNTAXHIGHLIGHTING_VERSION_STRING),
+#elif defined(SyntaxHighlighting_VERSION)
+             QStringLiteral(SyntaxHighlighting_VERSION),
+#else
+#   error Unsupported <ksyntaxhighlighting_version.h> header format
+#endif
              TextCodec::icuVersion())
         );
     libVersions->setMargin(10);

src/definitiondownload.cpp

@@ -16,8 +16,6 @@
 
 #include "definitiondownload.h"
 
-#ifdef SUPPORT_DEFINITION_DOWNLOADER
-
 #include <QPlainTextEdit>
 #include <QDialogButtonBox>
 #include <QPushButton>
@@ -105,5 +103,3 @@ void DefinitionDownloadDialog::closeEvent(QCloseEvent *e)
     if (!m_buttonBox->button(QDialogButtonBox::Close)->isEnabled())
         e->ignore();
 }
-
-#endif // SUPPORT_DEFINITION_DOWNLOADER

src/definitiondownload.h

@@ -17,10 +17,6 @@
 #ifndef QTEXTPAD_DEFINITIONDOWNLOAD_H
 #define QTEXTPAD_DEFINITIONDOWNLOAD_H
 
-#include "kf_version.h"
-
-#ifdef SUPPORT_DEFINITION_DOWNLOADER
-
 #include <QDialog>
 #include <QElapsedTimer>
 
@@ -53,6 +49,4 @@ public Q_SLOTS:
     QElapsedTimer m_timer;
 };
 
-#endif // SUPPORT_DEFINITION_DOWNLOADER
-
 #endif // QTEXTPAD_DEFINITIONDOWNLOAD_H

src/main.cpp

@@ -25,12 +25,9 @@
 #include <QStyle>
 #endif
 
-#include "kf_version.h"
 #include <KSyntaxHighlighting/Repository>
 #include <KSyntaxHighlighting/Definition>
-#ifdef SUPPORT_DEFINITION_DOWNLOADER
 #include <KSyntaxHighlighting/DefinitionDownloader>
-#endif
 
 #include "qtextpadwindow.h"
 #include "syntaxtextedit.h"
@@ -133,15 +130,12 @@ int main(int argc, char *argv[])
     parser.addOption(encodingOption);
     parser.addOption(syntaxOption);
 
-#ifdef SUPPORT_DEFINITION_DOWNLOADER
     const QCommandLineOption updateOption(QStringList{QStringLiteral("update-definitions")},
             QCoreApplication::translate("main", "Download updated syntax definitions from the internet and exit."));
     parser.addOption(updateOption);
-#endif
 
     parser.process(app);
 
-#ifdef SUPPORT_DEFINITION_DOWNLOADER
     if (parser.isSet(updateOption)) {
         // Handle this before any GUI objects are created
         KSyntaxHighlighting::Repository syntaxRepo;
@@ -155,7 +149,6 @@ int main(int argc, char *argv[])
         downloader.start();
         return QApplication::exec();
     }
-#endif
 
     setDefaultIconTheme();
 

src/qtextpadwindow.cpp

@@ -1640,7 +1640,6 @@ void QTextPadWindow::populateSyntaxMenu()
         connect(item, &QAction::triggered, this, [this, def] { setSyntax(def); });
     }
 
-#ifdef SUPPORT_DEFINITION_DOWNLOADER
     (void) m_syntaxMenu->addSeparator();
     auto updateAction = m_syntaxMenu->addAction(tr("Update Definitions"));
     connect(updateAction, &QAction::triggered, this, [this] {
@@ -1650,7 +1649,6 @@ void QTextPadWindow::populateSyntaxMenu()
         downloadDialog->raise();
         downloadDialog->activateWindow();
     });
-#endif
 }
 
 void QTextPadWindow::populateThemeMenu()