lily/relative-octave-music.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1998--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "music.hh"
  21 #include "warn.hh"
  22 #include "program-option.hh"
  23
  24 class Relative_octave_music
  25 {
  26 public:
  27   DECLARE_SCHEME_CALLBACK (relative_callback, (SCM, SCM));
  28   DECLARE_SCHEME_CALLBACK (no_relative_callback, (SCM, SCM));
  29 };
  30
  31 MAKE_SCHEME_CALLBACK (Relative_octave_music, no_relative_callback, 2)
  32   SCM
  33 Relative_octave_music::no_relative_callback (SCM /* music */,
  34                                              SCM pitch)
  35 {
  36   return pitch;
  37 }
  38
  39 MAKE_SCHEME_CALLBACK (Relative_octave_music, relative_callback, 2)
  40   SCM
  41 Relative_octave_music::relative_callback (SCM music, SCM pitch)
  42 {
  43   Music *me = unsmob_music (music);
  44   if (lily_1_8_relative)
  45     {
  46       lily_1_8_compatibility_used = true;
  47       /*  last-pitch should be junked some time, when
  48           we ditch 1.8 compat too.
  49
  50           When you do, B should start where A left off.
  51
  52           \relative { A \relative { ...} B }  */
  53       SCM last_pitch = me->get_property ("last-pitch");
  54       Pitch *ptr = unsmob_pitch (last_pitch);
  55       return (ptr) ? last_pitch : pitch;
  56     }
  57   else
  58     return pitch;
  59 }
  60