Split utilities functions into separate files

src/utilities/envutils.cpp

@@ -0,0 +1,73 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <cstdlib>
+
+#include <QtGlobal>
+#include <QByteArray>
+#include <QString>
+#include <QSettings>
+
+#include "envutils.h"
+
+namespace Utilities {
+
+QString GetEnv(const QString &key) {
+  const QByteArray key_data = key.toLocal8Bit();
+  return QString::fromLocal8Bit(qgetenv(key_data.constData()));
+}
+
+void SetEnv(const char *key, const QString &value) {
+
+#ifdef Q_OS_WIN32
+  _putenv(QString("%1=%2").arg(key, value).toLocal8Bit().constData());
+#else
+  setenv(key, value.toLocal8Bit().constData(), 1);
+#endif
+
+}
+
+QString DesktopEnvironment() {
+
+  const QString de = GetEnv("XDG_CURRENT_DESKTOP");
+  if (!de.isEmpty()) return de;
+
+  if (!qEnvironmentVariableIsEmpty("KDE_FULL_SESSION"))         return "KDE";
+  if (!qEnvironmentVariableIsEmpty("GNOME_DESKTOP_SESSION_ID")) return "Gnome";
+
+  QString session = GetEnv("DESKTOP_SESSION");
+  qint64 slash = session.lastIndexOf('/');
+  if (slash != -1) {
+    QSettings desktop_file(QString(session + ".desktop"), QSettings::IniFormat);
+    desktop_file.beginGroup("Desktop Entry");
+    QString name = desktop_file.value("DesktopNames").toString();
+    desktop_file.endGroup();
+    if (!name.isEmpty()) return name;
+    session = session.mid(slash + 1);
+  }
+
+  if (session == "kde")           return "KDE";
+  else if (session == "gnome")    return "Gnome";
+  else if (session == "xfce")     return "XFCE";
+
+  return "Unknown";
+
+}
+
+}  // namespace Utilities