lily/music-wrapper-iterator.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1998--2010 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-wrapper-iterator.hh"
  21 #include "music-wrapper.hh"
  22 #include "music.hh"
  23
  24 Music_wrapper_iterator::Music_wrapper_iterator ()
  25 {
  26   child_iter_ = 0;
  27 }
  28
  29 void
  30 Music_wrapper_iterator::do_quit ()
  31 {
  32   if (child_iter_)
  33     child_iter_->quit ();
  34 }
  35
  36 void
  37 Music_wrapper_iterator::derived_mark () const
  38 {
  39   if (child_iter_)
  40     scm_gc_mark (child_iter_->self_scm ());
  41 }
  42
  43 void
  44 Music_wrapper_iterator::derived_substitute (Context *f, Context *t)
  45 {
  46   if (child_iter_)
  47     child_iter_->substitute_outlet (f, t);
  48 }
  49
  50 void
  51 Music_wrapper_iterator::construct_children ()
  52 {
  53   Music *my_music = get_music ();
  54   Music *child = unsmob_music (my_music->get_property ("element"));
  55   child_iter_ = (child)
  56     ? unsmob_iterator (get_iterator (child))
  57     : 0;
  58 }
  59
  60 bool
  61 Music_wrapper_iterator::ok () const
  62 {
  63   return child_iter_ && child_iter_->ok ();
  64 }
  65
  66 void
  67 Music_wrapper_iterator::process (Moment m)
  68 {
  69   if (child_iter_)
  70     child_iter_->process (m);
  71 }
  72
  73 Moment
  74 Music_wrapper_iterator::pending_moment () const
  75 {
  76   if (child_iter_)
  77     return child_iter_->pending_moment ();
  78   else
  79     return Music_iterator::pending_moment ();
  80 }
  81
  82 IMPLEMENT_CTOR_CALLBACK (Music_wrapper_iterator);
  83
  84 bool
  85 Music_wrapper_iterator::run_always () const
  86 {
  87   return (child_iter_ &&  child_iter_->run_always ());
  88 }