separate 'song info' functionality from Info class

src/song_info.h

@@ -0,0 +1,61 @@
+/***************************************************************************
+ *   Copyright (C) 2008-2010 by Andrzej Rybczak                            *
+ *   electricityispower@gmail.com                                          *
+ *                                                                         *
+ *   This program 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 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program 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 this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
+ ***************************************************************************/
+
+#ifndef _SONG_INFO_H
+#define _SONG_INFO_H
+
+#include "screen.h"
+#include "song.h"
+
+class SongInfo : public Screen<Scrollpad>
+{
+	public:
+		struct Metadata
+		{
+			const char *Name;
+			MPD::Song::GetFunction Get;
+			MPD::Song::SetFunction Set;
+		};
+		
+		virtual void SwitchTo();
+		virtual void Resize();
+		
+		virtual std::basic_string<my_char_t> Title();
+		
+		virtual void EnterPressed() { }
+		virtual void SpacePressed() { }
+		
+		virtual bool allowsSelection() { return false; }
+		
+		virtual List *GetList() { return 0; }
+		
+		static const Metadata Tags[];
+		
+	protected:
+		virtual void Init();
+		
+	private:
+		void PrepareSong(MPD::Song &);
+};
+
+extern SongInfo *mySongInfo;
+
+#endif
+