lily/music-wrapper-iterator.cc

   1 /*
   2   music-wrapper-iterator.cc -- implement Music_wrapper_iterator
   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-wrapper-iterator.hh"
  10 #include "music-wrapper.hh"
  11 #include "music.hh"
  12
  13 Music_wrapper_iterator::Music_wrapper_iterator ()
  14 {
  15   child_iter_ = 0;
  16 }
  17
  18 void
  19 Music_wrapper_iterator::do_quit ()
  20 {
  21   if (child_iter_)
  22     child_iter_->quit ();
  23 }
  24
  25 void
  26 Music_wrapper_iterator::derived_mark () const
  27 {
  28   if (child_iter_)
  29     scm_gc_mark (child_iter_->self_scm ());
  30 }
  31
  32 void
  33 Music_wrapper_iterator::derived_substitute (Context *f, Context *t)
  34 {
  35   if (child_iter_)
  36     child_iter_->substitute_outlet (f, t);
  37 }
  38
  39 void
  40 Music_wrapper_iterator::construct_children ()
  41 {
  42   Music *my_music = get_music ();
  43   Music *child = unsmob_music (my_music->get_property ("element"));
  44   child_iter_ = (child)
  45     ? unsmob_iterator (get_iterator (child))
  46     : 0;
  47 }
  48
  49 bool
  50 Music_wrapper_iterator::ok () const
  51 {
  52   return child_iter_ && child_iter_->ok ();
  53 }
  54
  55 void
  56 Music_wrapper_iterator::process (Moment m)
  57 {
  58   if (child_iter_)
  59     child_iter_->process (m);
  60 }
  61
  62 Moment
  63 Music_wrapper_iterator::pending_moment () const
  64 {
  65   if (child_iter_)
  66     return child_iter_->pending_moment ();
  67   else
  68     return Music_iterator::pending_moment ();
  69 }
  70
  71 IMPLEMENT_CTOR_CALLBACK (Music_wrapper_iterator);
  72
  73 bool
  74 Music_wrapper_iterator::run_always () const
  75 {
  76   return (child_iter_ &&  child_iter_->run_always ());
  77 }