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--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7  */
   8
   9
  10 #include "music-wrapper-iterator.hh"
  11 #include "music-wrapper.hh"
  12
  13 Music_wrapper_iterator::Music_wrapper_iterator ()
  14 {
  15   child_iter_ =0;
  16 }
  17
  18 Music_wrapper_iterator::Music_wrapper_iterator (Music_wrapper_iterator const &src)
  19   : Music_iterator (src)
  20 {
  21   child_iter_ = (src.child_iter_) ? src.child_iter_->clone () : 0;
  22   if (child_iter_)
  23     scm_gc_unprotect_object (child_iter_->self_scm());
  24 }
  25
  26 void
  27 Music_wrapper_iterator::do_quit()
  28 {
  29   child_iter_->quit();
  30 }
  31
  32 void
  33 Music_wrapper_iterator::derived_mark()const
  34 {
  35   if (child_iter_)
  36     scm_gc_mark (child_iter_->self_scm());
  37 }
  38
  39
  40 void
  41 Music_wrapper_iterator::construct_children ()
  42 {
  43   Music * m =  dynamic_cast<Music_wrapper const*> (get_music ())-> element();
  44   child_iter_ = unsmob_iterator (get_iterator (m));
  45 }
  46
  47 bool
  48 Music_wrapper_iterator::ok () const
  49 {
  50   return child_iter_ && child_iter_->ok ();
  51 }
  52 void
  53 Music_wrapper_iterator::skip (Moment m)
  54 {
  55   /*
  56     FIXME: should make sure that the initial try_music () is skipped as
  57     well, if you would do
  58
  59     iter = get_iterator (Side_effect_music); // eg. property setting
  60     iter->skip (1/2)
  61     iter->process ()
  62
  63   */
  64   child_iter_->skip (m);
  65 }
  66
  67 void
  68 Music_wrapper_iterator::process (Moment m)
  69 {
  70   child_iter_->process (m);
  71 }
  72
  73 SCM
  74 Music_wrapper_iterator::get_pending_events (Moment m)const
  75 {
  76   return child_iter_->get_pending_events (m);
  77 }
  78
  79 Moment
  80 Music_wrapper_iterator::pending_moment () const
  81 {
  82   return child_iter_->pending_moment ();
  83 }
  84
  85 Music_iterator*
  86 Music_wrapper_iterator::try_music_in_children (Music *m) const
  87 {
  88   return child_iter_->try_music (m);
  89 }
  90
  91 IMPLEMENT_CTOR_CALLBACK (Music_wrapper_iterator);