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--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "music.hh"
  10 #include "warn.hh"
  11 #include "program-option.hh"
  12
  13 class Relative_octave_music
  14 {
  15 public:
  16   DECLARE_SCHEME_CALLBACK (relative_callback, (SCM, SCM));
  17   DECLARE_SCHEME_CALLBACK (no_relative_callback, (SCM, SCM));
  18 };
  19
  20 MAKE_SCHEME_CALLBACK (Relative_octave_music, no_relative_callback, 2)
  21   SCM
  22 Relative_octave_music::no_relative_callback (SCM /* music */,
  23                                              SCM pitch)
  24 {
  25   return pitch;
  26 }
  27
  28 MAKE_SCHEME_CALLBACK (Relative_octave_music, relative_callback, 2)
  29   SCM
  30 Relative_octave_music::relative_callback (SCM music, SCM pitch)
  31 {
  32   Music *me = unsmob_music (music);
  33   if (lily_1_8_relative)
  34     {
  35       lily_1_8_compatibility_used = true;
  36       /*  last-pitch should be junked some time, when
  37           we ditch 1.8 compat too.
  38
  39           When you do, B should start where A left off.
  40
  41           \relative { A \relative { ...} B }  */
  42       SCM last_pitch = me->get_property ("last-pitch");
  43       Pitch *ptr = unsmob_pitch (last_pitch);
  44       return (ptr) ? last_pitch : pitch;
  45     }
  46   else
  47     return pitch;
  48 }
  49