lily/relative-octave-music.cc

   1 /*
   2   relative-music.cc -- implement Relative_octave_music
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "music.hh"
  10 #include "pitch.hh"
  11 #include "warn.hh"
  12 #include "program-option.hh"
  13
  14 class Relative_octave_music
  15 {
  16 public:
  17   DECLARE_SCHEME_CALLBACK (relative_callback, (SCM, SCM));
  18   DECLARE_SCHEME_CALLBACK (no_relative_callback, (SCM, SCM));
  19 };
  20
  21 MAKE_SCHEME_CALLBACK (Relative_octave_music, no_relative_callback, 2)
  22   SCM
  23 Relative_octave_music::no_relative_callback (SCM music, SCM pitch)
  24 {
  25   (void)music;
  26   return pitch;
  27 }
  28
  29 MAKE_SCHEME_CALLBACK (Relative_octave_music, relative_callback, 2)
  30   SCM
  31 Relative_octave_music::relative_callback (SCM music, SCM pitch)
  32 {
  33   Music *me = unsmob_music (music);
  34   if (lily_1_8_relative)
  35     {
  36       lily_1_8_compatibility_used = true;
  37       /*  last-pitch should be junked some time, when
  38           we ditch 1.8 compat too.
  39
  40           When you do, B should start where A left off.
  41
  42           \relative { A \relative { ...} B }  */
  43       SCM last_pitch = me->get_property ("last-pitch");
  44       Pitch *ptr = unsmob_pitch (last_pitch);
  45       return (ptr) ? last_pitch : pitch;
  46     }
  47   else
  48     return pitch;
  49 }
  50