Ref T620, check for empty string as path, QDir("") exists

src/blackmisc/directories.cpp

@@ -96,6 +96,7 @@ namespace BlackMisc
 
     QString CDirectories::existingOrDefaultDir(const QString &checkDir, const QString &defaultDir) const
     {
+        if (checkDir.isEmpty()) { return defaultDir; } // empty dir returns true ????
         const QDir d(checkDir);
         if (d.exists()) { return checkDir; }
         return defaultDir;

src/blackmisc/directoryutils.cpp

@@ -39,6 +39,12 @@ namespace BlackMisc
         return binDir;
     }
 
+    bool CDirectoryUtils::isInApplicationDirectory(const QString &path)
+    {
+        if (path.isEmpty()) { return false; }
+        return path.contains(qApp->applicationDirPath(), CFileUtils::osFileNameCaseSensitivity());
+    }
+
     const QString &CDirectoryUtils::pluginsDirectory()
     {
         static const QString pDir(CFileUtils::appendFilePaths(binDirectory(), "plugins"));
@@ -386,7 +392,7 @@ namespace BlackMisc
     {
         const QStringList pathes(QStandardPaths::standardLocations(QStandardPaths::DocumentsLocation));
         QString d = pathes.first();
-        d = QDir::cleanPath(d + QDir::separator() + "swift");
+        d = QDir::cleanPath(CFileUtils::appendFilePaths(d, "swift"));
         QDir dir(d);
         if (dir.exists()) { return dir.absolutePath(); }
         return pathes.first();

src/blackmisc/directoryutils.h

@@ -37,6 +37,9 @@ namespace BlackMisc
         //! \see https://dev.swift-project.org/w/dev/swiftpc/dirstructure/
         static const QString &binDirectory();
 
+        //! Path in application directory
+        static bool isInApplicationDirectory(const QString &path);
+
         //! Plugins directory
         static const QString &pluginsDirectory();