lily/percent-repeat-iterator.cc

   1 /*
   2   percent-repeat-iterator.cc --  implement Percent_repeat_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2001--2003  Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "percent-repeat-iterator.hh"
  11 #include "repeated-music.hh"
  12 #include "input.hh"
  13
  14 IMPLEMENT_CTOR_CALLBACK (Percent_repeat_iterator);
  15
  16
  17 Percent_repeat_iterator::Percent_repeat_iterator ()
  18 {
  19   child_iter_ = 0;
  20 }
  21
  22 void
  23 Percent_repeat_iterator::do_quit()
  24 {
  25   if (child_iter_)
  26     child_iter_->quit();
  27 }
  28 Percent_repeat_iterator::Percent_repeat_iterator (Percent_repeat_iterator const & p)
  29   : Music_iterator (p)
  30 {
  31   child_iter_ = 0;
  32  finish_mom_ = p.finish_mom_ ;
  33
  34   if (p.child_iter_)
  35     {
  36       child_iter_ =  p.child_iter_->clone ();
  37       scm_gc_unprotect_object (child_iter_->self_scm());
  38     }
  39 }
  40
  41 bool
  42 Percent_repeat_iterator::ok () const
  43 {
  44   return child_iter_;
  45 }
  46
  47 void
  48 Percent_repeat_iterator::construct_children ()
  49 {
  50   Repeated_music * mus =dynamic_cast<Repeated_music *> (get_music ());
  51   finish_mom_ = mus->get_length ();
  52   child_iter_ = unsmob_iterator (get_iterator (mus->body ()));
  53 }
  54
  55
  56 void
  57 Percent_repeat_iterator::process (Moment m)
  58 {
  59   if (!m.to_bool ())
  60     {
  61       Music_iterator *yeah = try_music (get_music ());
  62       if (yeah)
  63         set_translator (yeah->report_to ());
  64       else
  65         get_music ()->origin ()->warning ( _ ("no one to print a percent"));
  66     }
  67
  68   if (child_iter_->ok ())
  69     child_iter_->process (m);
  70
  71   if (finish_mom_ <= m )
  72     {
  73       child_iter_->quit();
  74       child_iter_ = 0;
  75     }
  76 }
  77
  78 Moment
  79 Percent_repeat_iterator::pending_moment ()const
  80 {
  81   if (child_iter_->ok ())
  82     return child_iter_->pending_moment ();
  83   else
  84     return finish_mom_ ;
  85 }
  86
  87 Music_iterator*
  88 Percent_repeat_iterator::try_music_in_children (Music *m) const
  89 {
  90   return child_iter_->try_music (m);
  91 }
  92
  93 void
  94 Percent_repeat_iterator::derived_mark()const
  95 {
  96   if (child_iter_)
  97     scm_gc_mark (child_iter_->self_scm());
  98 }