Use virtual functions for OSD

src/osd/osdmac.h

@@ -0,0 +1,46 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2020, 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/>.
+ *
+ */
+
+#ifndef OSDMAC_H
+#define OSDMAC_H
+
+#include "config.h"
+
+#include <QtGlobal>
+#include <QObject>
+
+#include "osdbase.h"
+
+class OSDMac : public OSDBase {
+  Q_OBJECT
+
+ public:
+  explicit OSDMac(SystemTrayIcon *tray_icon, Application *app, QObject *parent = nullptr);
+  ~OSDMac() override;
+
+  bool SupportsNativeNotifications() override;
+  bool SupportsTrayPopups() override;
+
+ private:
+  void ShowMessageNative(const QString &summary, const QString &message, const QString &icon, const QImage &image) override;
+};
+
+#endif  // OSDMAC_H