actions: only shuffle selected range of playlist if applicable

src/actions.cpp

@@ -1184,7 +1184,10 @@ void ToggleRepeat::run()
 
 void Shuffle::run()
 {
-	Mpd.Shuffle();
+	auto begin = myPlaylist->main().begin(), end = myPlaylist->main().end();
+	auto range = getSelectedRange(begin, end);
+	Mpd.ShuffleRange(range.first-begin, range.second-begin);
+	Statusbar::print("Range shuffled");
 }
 
 void ToggleRandom::run()

src/help.cpp

@@ -240,7 +240,7 @@ void write_bindings(NC::Scrollpad &w)
 	key(w, Type::ToggleConsume, "Toggle consume mode");
 	key(w, Type::ToggleReplayGainMode, "Toggle replay gain mode");
 	key(w, Type::ToggleBitrateVisibility, "Toggle bitrate visibility");
-	key(w, Type::Shuffle, "Shuffle playlist");
+	key(w, Type::Shuffle, "Shuffle selected range in playlist");
 	key(w, Type::ToggleCrossfade, "Toggle crossfade mode");
 	key(w, Type::SetCrossfade, "Set crossfade");
 	key(w, Type::SetVolume, "Set volume");

src/mpdpp.cpp

@@ -297,6 +297,13 @@ void Connection::Shuffle()
 	checkErrors();
 }
 
+void Connection::ShuffleRange(unsigned start, unsigned end)
+{
+	prechecksNoCommandsList();
+	mpd_run_shuffle_range(m_connection.get(), start, end);
+	checkErrors();
+}
+
 void Connection::ClearMainPlaylist()
 {
 	prechecksNoCommandsList();

src/mpdpp.h

@@ -498,6 +498,7 @@ struct Connection
 	void Swap(unsigned, unsigned);
 	void Seek(unsigned int pos, unsigned int where);
 	void Shuffle();
+	void ShuffleRange(unsigned start, unsigned end);
 	void ClearMainPlaylist();
 	
 	SongIterator GetPlaylistChanges(unsigned);