Write settings, logs, cache, etc. into a installation dependent subfolder

refs #668

src/blackmisc/directoryutils.cpp

@@ -0,0 +1,54 @@
+/* Copyright (C) 2016
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \cond PRIVATE
+
+#include "blackmisc/directoryutils.h"
+
+#include <QCoreApplication>
+#include <QDir>
+#include <QRegularExpression>
+
+namespace BlackMisc
+{
+
+    QString applicationDirectoryPathImpl()
+    {
+        QString appDirectoryString(qApp->applicationDirPath());
+        if (appDirectoryString.endsWith("Contents/MacOS")) { appDirectoryString += "/../../.."; }
+        QDir appDirectory(appDirectoryString);
+        return appDirectory.absolutePath();
+    }
+
+    QString CDirectoryUtils::applicationDirectoryPath()
+    {
+        static const QString appDirectory(applicationDirectoryPathImpl());
+        return appDirectory;
+    }
+
+    QString normalizedApplicationDirectoryImpl()
+    {
+        QString appDir = CDirectoryUtils::applicationDirectoryPath().toLower();
+        Q_ASSERT(appDir.size() > 0);
+        // Remove leading '/' on Unix
+        if (appDir.at(0) == '/') { appDir.remove(0, 1); }
+        const QRegularExpression re("[:\\\\\\/]");
+        appDir = appDir.replace(re, "_");
+        return appDir;
+    }
+
+    const QString &CDirectoryUtils::normalizedApplicationDirectory()
+    {
+        static const QString appDir(normalizedApplicationDirectoryImpl());
+        return appDir;
+    }
+
+} // ns
+
+//! \endcond