support adding last.fm streams to playlist

src/mpdpp.cpp

@@ -1027,6 +1027,15 @@ bool MPD::Connection::DeletePlaylist(const std::string &name)
 	}
 }
 
+bool MPD::Connection::LoadPlaylist(const std::string &name)
+{
+	if (!itsConnection)
+		return false;
+	assert(!isCommandsListEnabled);
+	GoBusy();
+	return mpd_run_load(itsConnection, name.c_str());
+}
+
 int MPD::Connection::SavePlaylist(const std::string &name)
 {
 	if (!itsConnection)

src/mpdpp.h

@@ -184,6 +184,7 @@ namespace MPD
 			bool CommitCommandsList();
 			
 			bool DeletePlaylist(const std::string &);
+			bool LoadPlaylist(const std::string &name);
 			int SavePlaylist(const std::string &);
 			void ClearPlaylist(const std::string &);
 			void AddToPlaylist(const std::string &, const Song &);

src/ncmpcpp.cpp

@@ -1235,13 +1235,21 @@ int main(int argc, char *argv[])
 			UnlockStatusbar();
 			if (!path.empty())
 			{
+				Statusbar() << "Adding...";
+				wFooter->Refresh();
 				if (myScreen == myPlaylistEditor)
 				{
 					Mpd.AddToPlaylist(myPlaylistEditor->Playlists->Current(), path);
 					myPlaylistEditor->Content->Clear(); // make it refetch content of playlist
 				}
 				else
-					Mpd.Add(path);
+				{
+					static const char lastfm_url[] = "lastfm://";
+					if (path.compare(0, static_strlen(lastfm_url), lastfm_url) == 0)
+						Mpd.LoadPlaylist(path);
+					else
+						Mpd.Add(path);
+				}
 				UpdateStatusImmediately = 1;
 			}
 		}