support for following lyrics of now playing song

doc/ncmpcpprc

@@ -116,6 +116,8 @@
 #
 #fancy_scrolling = "yes"
 #
+#follow_now_playing_lyrics = "no"
+#
 #enable_window_title = "yes"
 #
 ##### colors definitions #####

src/ncmpcpp.cpp

@@ -116,6 +116,7 @@ bool block_item_list_update = 0;
 bool messages_allowed = 0;
 bool redraw_screen = 0;
 bool redraw_header = 1;
+bool reload_lyrics = 0;
 
 extern bool header_update_status;
 extern bool search_case_sensitive;
@@ -325,7 +326,6 @@ int main(int argc, char *argv[])
 		messages_allowed = 1;
 		
 		// header stuff
-		
 		const int max_allowed_title_length = wHeader->GetWidth()-volume_state.length();
 		if (current_screen == csBrowser && input == ERR && browsed_dir.length() > max_allowed_title_length)
 			redraw_header = 1;
@@ -412,11 +412,9 @@ int main(int argc, char *argv[])
 			wHeader->SetColor(Config.header_color);
 			redraw_header = 0;
 		}
-		
 		// header stuff end
 		
 		// media library stuff
-		
 		if (current_screen == csLibrary)
 		{
 			if (mLibArtists->Empty())
@@ -515,11 +513,9 @@ int main(int argc, char *argv[])
 				mLibSongs->Refresh();
 			}
 		}
-		
 		// media library end
-		
+		else
 		// playlist editor stuff
-		
 		if (current_screen == csPlaylistEditor)
 		{
 			if (mPlaylistList->Empty())
@@ -532,7 +528,7 @@ int main(int argc, char *argv[])
 				mPlaylistList->Window::Clear();
 				mPlaylistList->Refresh();
 			}
-		
+			
 			if (mPlaylistEditor->Empty())
 			{
 				mPlaylistEditor->Reset();
@@ -571,11 +567,10 @@ int main(int argc, char *argv[])
 			if (mPlaylistEditor->Empty())
 				mPlaylistEditor->WriteXY(0, 0, "Playlist is empty.");
 		}
-		
 		// playlist editor end
-		
+		else
-		// album editor stuff
 #		ifdef HAVE_TAGLIB_H
+		// album editor stuff
 		if (current_screen == csTagEditor)
 		{
 			if (mEditorLeftCol->Empty())
@@ -662,8 +657,19 @@ int main(int argc, char *argv[])
 			else if (mEditorTagTypes->GetChoice() >= 10)
 				mEditorTags->Window::Clear();
 		}
-#		endif // HAVE_TAGLIB_H
 		// album editor end
+		else
+#		endif // HAVE_TAGLIB_H
+		// lyrics stuff
+		if (current_screen == csLyrics && reload_lyrics)
+		{
+			const Song &s = mPlaylist->at(now_playing);
+			if (s.GetArtist() != UNKNOWN_ARTIST && s.GetTitle() != UNKNOWN_TITLE)
+				goto LOAD_LYRICS;
+			else
+				reload_lyrics = 0;
+		}
+		// lyrics end
 		
 		if (Config.columns_in_playlist && wCurrent == mPlaylist)
 			wCurrent->Display(redraw_screen);
@@ -1586,6 +1592,11 @@ int main(int argc, char *argv[])
 					redraw_screen = 1;
 				}
 #				endif // HAVE_TAGLIB_H
+				else if (current_screen == csLyrics)
+				{
+					Config.now_playing_lyrics = !Config.now_playing_lyrics;
+					ShowMessage("Reload lyrics if song changes: " + string(Config.now_playing_lyrics ? "On" : "Off"));
+				}
 			}
 		}
 		else if (Keypressed(input, Key.VolumeUp))
@@ -2968,8 +2979,21 @@ int main(int argc, char *argv[])
 			||  (wCurrent == mPlaylistEditor && !mPlaylistEditor->Empty())
 			||  (wCurrent == mEditorTags && !mEditorTags->Empty()))
 			{
+				LOAD_LYRICS:
+				
 				Song *s;
-				int id = wCurrent->GetChoice();
+				int id;
+				
+				if (reload_lyrics)
+				{
+					current_screen = csPlaylist;
+					wCurrent = mPlaylist;
+					reload_lyrics = 0;
+					id = now_playing;
+				}
+				else
+					id = wCurrent->GetChoice();
+				
 				switch (current_screen)
 				{
 					case csPlaylist:

src/settings.cpp

@@ -186,6 +186,7 @@ void DefaultConfiguration(ncmpcpp_config &conf)
 	conf.space_selects = false;
 	conf.albums_in_tag_editor = false;
 	conf.incremental_seeking = true;
+	conf.now_playing_lyrics = false;
 	conf.set_window_title = true;
 	conf.mpd_connection_timeout = 15;
 	conf.crossfade_time = 5;
@@ -569,6 +570,10 @@ void ReadConfiguration(ncmpcpp_config &conf)
 			{
 				conf.incremental_seeking = v == "yes";
 			}
+			else if (it->find("follow_now_playing_lyrics") != string::npos)
+			{
+				conf.now_playing_lyrics = v == "yes";
+			}
 			else if (it->find("enable_window_title") != string::npos)
 			{
 				conf.set_window_title = v == "yes";

src/settings.h

@@ -135,6 +135,7 @@ struct ncmpcpp_config
 	bool space_selects;
 	bool albums_in_tag_editor;
 	bool incremental_seeking;
+	bool now_playing_lyrics;
 	
 	int mpd_connection_timeout;
 	int crossfade_time;

src/status_checker.cpp

@@ -61,6 +61,7 @@ extern string mpd_crossfade;
 extern string mpd_db_updating;
 
 extern NcmpcppScreen current_screen;
+extern NcmpcppScreen prev_screen;
 
 extern bool dont_change_now_playing;
 extern bool allow_statusbar_unlock;
@@ -71,6 +72,7 @@ extern bool block_item_list_update;
 
 extern bool redraw_screen;
 extern bool redraw_header;
+extern bool reload_lyrics;
 
 bool header_update_status = 0;
 bool repeat_one_allowed = 0;
@@ -308,6 +310,9 @@ void NcmpcppStatusChanged(MPDConnection *Mpd, MPDStatusChanges changed, void *da
 			
 			if (!Mpd->GetElapsedTime())
 				mvwhline(wFooter->RawWin(), 0, 0, 0, wFooter->GetWidth());
+			
+			if (Config.now_playing_lyrics && current_screen == csLyrics && prev_screen == csPlaylist)
+				reload_lyrics = 1;
 		}
 		playing_song_scroll_begin = 0;