update artists' list if database has changed

src/ncmpcpp.cpp

@@ -365,7 +365,11 @@ int main(int argc, char *argv[])
 			MpdData *data;
 			
 			if (wCurrent == mLibAlbums && mLibAlbums->Empty())
+			{
+				mLibAlbums->HighlightColor(Config.main_color);
+				mLibArtists->HighlightColor(Config.library_active_column_color);
 				wCurrent = mLibArtists;
+			}
 			
 			if (wCurrent == mLibArtists)
 			{
@@ -1008,6 +1012,8 @@ int main(int argc, char *argv[])
 						}
 						
 						if (wCurrent == mLibSongs)
+						{
+							if (!vSongs.empty())
 							{
 								Song &s = vSongs[mLibSongs->GetChoice()-1];
 								ShowMessage("Added to playlist: " + OmitBBCodes(DisplaySong(s)));
@@ -1015,6 +1021,7 @@ int main(int argc, char *argv[])
 								if (input == ENTER && s.GetHash() == vPlaylist.back()->GetHash())
 									mpd_player_play_id(conn, vPlaylist.back()->GetID());
 							}
+						}
 						
 						if (input == KEY_SPACE)
 							wCurrent->Go(DOWN);
@@ -1240,7 +1247,7 @@ int main(int argc, char *argv[])
 							ShowMessage("Playlist saved as: " + playlist_name);
 							break;
 						case MPD_DATABASE_PLAYLIST_EXIST:
-							ShowMessage("Playlist already exist!");
+							ShowMessage("Playlist already exists!");
 							break;
 					}
 				}

src/status_checker.cpp

@@ -43,6 +43,8 @@ extern vector<Song *> vPlaylist;
 extern vector<Song> vSearched;
 extern vector<BrowsedItem> vBrowser;
 
+extern vector<string> vArtists;
+
 extern time_t block_delay;
 extern time_t timer;
 extern time_t now;
@@ -251,6 +253,25 @@ void NcmpcppStatusChanged(MpdObj *conn, ChangedStatusType what)
 	if(what & MPD_CST_DATABASE)
 	{
 		GetDirectory(browsed_dir);
+		if (!mLibArtists->Empty())
+		{
+			ShowMessage("Updating artists' list...");
+			mLibArtists->Clear(0);
+			vArtists.clear();
+			MpdData *data = mpd_database_get_artists(conn);
+			FOR_EACH_MPD_DATA(data)
+				vArtists.push_back(data->tag);
+			mpd_data_free(data);
+			sort(vArtists.begin(), vArtists.end(), CaseInsensitiveComparison);
+			for (vector<string>::const_iterator it = vArtists.begin(); it != vArtists.end(); it++)
+				mLibArtists->AddOption(*it);
+			if (current_screen == csLibrary)
+			{
+				mLibArtists->Hide();
+				mLibArtists->Display();
+			}
+			ShowMessage("List updated!");
+		}
 		block_library_update = 0;
 	}
 	if (what & MPD_CST_STATE)