split apart "GetSongCredits()"

stepmania/src/SongManager.cpp

@@ -1280,20 +1280,37 @@ int LuaFunc_##func( lua_State *L ) { \
 LuaFunction( func ); /* register it */
 LuaFunction_Steps( StepsMeter, p->GetMeter() );
 
-CString GetSongCredits()
+CString GetCurrentSongDisplayTitle()
 {
-	if( GAMESTATE->IsCourseMode() )
+	const Song* pSong = GAMESTATE->m_pCurSong;
+	if( pSong == NULL )
 		return "";
+	return pSong->GetFullDisplayTitle();
+}
 
+CString GetCurrentSongDisplayArtist()
+{
+	const Song* pSong = GAMESTATE->m_pCurSong;
+	if( pSong == NULL )
+		return "";
+	return pSong->GetDisplayArtist();
+}
+
+CString GetCurrentSongCredit()
+{
+	const Song* pSong = GAMESTATE->m_pCurSong;
+	if( pSong == NULL )
+		return "";
+	return pSong->m_sCredit;
+}
+
+CString GetCurrentStepsCredits()
+{
 	const Song* pSong = GAMESTATE->m_pCurSong;
 	if( pSong == NULL )
 		return "";
 
 	CString s;
-	s += pSong->GetFullDisplayTitle() + "\n";
-	s += pSong->GetDisplayArtist() + "\n";
-	if( !pSong->m_sCredit.empty() )
-		s += pSong->m_sCredit + "\n";
 
 	// use a vector and not a set so that ordering is maintained
 	vector<Steps*> vpStepsToShow;
@@ -1325,7 +1342,10 @@ CString GetSongCredits()
 	return s;
 }
 
-LuaFunction_NoArgs( GetSongCredits,		GetSongCredits() )
+LuaFunction_NoArgs( GetCurrentSongDisplayTitle,		GetCurrentSongDisplayTitle() )
+LuaFunction_NoArgs( GetCurrentSongDisplayArtist,	GetCurrentSongDisplayArtist() )
+LuaFunction_NoArgs( GetCurrentSongCredit,			GetCurrentSongCredit() )
+LuaFunction_NoArgs( GetCurrentStepsCredits,			GetCurrentStepsCredits() )
 
 /*
  * (c) 2001-2004 Chris Danford, Glenn Maynard