fix: Failed to compile in Qt5 environment

Refactored the resource handling in CMakeLists.txt to support both
Qt5 and Qt6 versions

Additionally, updated string splitting logic across multiple files
to ensure compatibility with different Qt versions.

CMakeLists.txt

@@ -260,7 +260,11 @@ IF("${srcdir}" STREQUAL "gtk")
     ENDFOREACH()
 
 ELSEIF("${srcdir}" STREQUAL "qt")
-    QT_ADD_RESOURCES(gimagereader_RESOURCES_RCC ${gimagereader_RESOURCES})
+    IF("${INTERFACE_TYPE}" STREQUAL "qt5")
+        QT5_ADD_RESOURCES(gimagereader_RESOURCES_RCC ${gimagereader_RESOURCES})
+    ELSE()
+        QT_ADD_RESOURCES(gimagereader_RESOURCES_RCC ${gimagereader_RESOURCES})
+    ENDIF()
     SET(UIC_EXECUTABLE Qt${QT_VER}::uic)
 
     # Custom WRAP_UI which also gettext-izes the result

qt/src/ConfigSettings.cc

@@ -41,7 +41,12 @@ TableSetting::TableSetting(const QString& key, QTableWidget* table)
 	m_table->setRowCount(0);
 	int nCols = m_table->columnCount();
 
-	for(const QString& row : str.split(';', Qt::SkipEmptyParts)) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+	QStringList rowList = str.split(';', QString::SkipEmptyParts);
+#else
+	QStringList rowList = str.split(';', Qt::SkipEmptyParts);
+#endif
+	for(const QString& row : rowList) {
 		int colidx = 0;
 		QStringList cols = row.split(',');
 		if(cols.size() != nCols) {

qt/src/CrashHandler.cc

@@ -61,7 +61,11 @@ void CrashHandler::handleGdbFinished(int exitCode, QProcess::ExitStatus exitStat
 	if(exitCode != 0 || exitStatus != QProcess::NormalExit) {
 		ui.plainTextEditBacktrace->appendPlainText(_("Failed to obtain backtrace. Is GDB installed?"));
 	} else {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+		QStringList lines = ui.plainTextEditBacktrace->toPlainText().split("\n", QString::SkipEmptyParts);
+#else
 		QStringList lines = ui.plainTextEditBacktrace->toPlainText().split("\n", Qt::SkipEmptyParts);
+#endif
 		ui.plainTextEditBacktrace->setPlainText(lines[0]);
 		ui.plainTextEditBacktrace->appendPlainText("\n");
 		for(int i = 1, n = lines.length(); i < n; ++i) {

qt/src/DisplayRenderer.hh

@@ -23,6 +23,7 @@
 #include <QByteArray>
 #include <QString>
 #include <QMutex>
+#include <memory>
 
 class DjVuDocument;
 

qt/src/FileTreeModel.cc

@@ -73,7 +73,11 @@ QModelIndex FileTreeModel::insertFile(QString filePath, DataObject* data, const
 		return index(row, 0, index(0, 0));
 	} else if(m_root->path.startsWith(fileDir)) {
 		// Root below new path, replace root
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+		QStringList path = m_root->path.mid(fileDir.length()).split("/", QString::SkipEmptyParts);
+#else
 		QStringList path = m_root->path.mid(fileDir.length()).split("/", Qt::SkipEmptyParts);
+#endif
 		beginRemoveRows(QModelIndex(), 0, 0);
 		DirNode* oldroot = m_root;
 		m_root = nullptr;
@@ -91,7 +95,11 @@ QModelIndex FileTreeModel::insertFile(QString filePath, DataObject* data, const
 		return index(1, 0, index(0, 0));
 	} else if(fileDir.startsWith(m_root->path)) {
 		// New path below root, append to subtree
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+		QStringList path = fileDir.mid(m_root->path.length()).split("/", QString::SkipEmptyParts);
+#else
 		QStringList path = fileDir.mid(m_root->path.length()).split("/", Qt::SkipEmptyParts);
+#endif
 		DirNode* cur = m_root;
 		QModelIndex idx = index(0, 0);
 		for(const QString& part : path) {
@@ -116,8 +124,13 @@ QModelIndex FileTreeModel::insertFile(QString filePath, DataObject* data, const
 		return index(row, 0, idx);
 	} else {
 		// Unrelated trees, find common ancestor
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+		QStringList rootPath = m_root->path.split("/", QString::SkipEmptyParts);
+		QStringList newPath = fileDir.split("/", QString::SkipEmptyParts);
+#else
 		QStringList rootPath = m_root->path.split("/", Qt::SkipEmptyParts);
 		QStringList newPath = fileDir.split("/", Qt::SkipEmptyParts);
+#endif
 		int pos = 0;
 		for(int n = qMin(rootPath.length(), newPath.length()); pos < n; ++pos) {
 			if(rootPath[pos] != newPath[pos]) {
@@ -194,7 +207,11 @@ QModelIndex FileTreeModel::findFile(const QString& filePath, bool isFile) const
 		return QModelIndex();
 	}
 	QString relPath = fileDir.mid(cur->path.length());
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+	QStringList parts = relPath.split("/", QString::SkipEmptyParts);
+#else
 	QStringList parts = relPath.split("/", Qt::SkipEmptyParts);
+#endif
 	for(const QString& part : parts) {
 		auto it = cur->dirs.find(part);
 		if(it == cur->dirs.end()) {

qt/src/RecognitionMenu.cc

@@ -135,7 +135,11 @@ void RecognitionMenu::rebuild() {
 		m_multilingualAction->setCheckable(true);
 		m_menuMultilanguage = new QMenu();
 		isMultilingual = curlang.prefix.contains('+');
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+		QStringList sellangs = curlang.prefix.split('+', QString::SkipEmptyParts);
+#else
 		QStringList sellangs = curlang.prefix.split('+', Qt::SkipEmptyParts);
+#endif
 		for(const QString& langprefix : availLanguages) {
 			if(langprefix == "osd") {
 				continue;

qt/src/Recognizer.cc

@@ -144,8 +144,17 @@ QList<int> Recognizer::selectPages(bool& autodetectLayout) {
 		QString text = m_pagesDialogUi.lineEditPageRange->text();
 		if((match = validateRegEx.match(text)).hasMatch()) {
 			text.replace(QRegularExpression("\\s+"), "");
-			for(const QString& block : text.split(',', Qt::SkipEmptyParts)) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+			QStringList blockList = text.split(',', QString::SkipEmptyParts);
+#else
+			QStringList blockList = text.split(',', Qt::SkipEmptyParts);
+#endif
+			for(const QString& block : blockList) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+				QStringList ranges = block.split('-', QString::SkipEmptyParts);
+#else
 				QStringList ranges = block.split('-', Qt::SkipEmptyParts);
+#endif
 				if(ranges.size() == 1) {
 					int page = ranges[0].toInt();
 					if(page > 0 && page <= nPages) {