lily/chord-tremolo-iterator.cc

   1 /*
   2   chord-tremolo-iterator.cc --  implement Chord_tremolo_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10
  11 /*
  12   this is culled from various other iterators, but sharing code by subclassing proved to be too difficult.
  13  */
  14
  15 #include "input.hh"
  16 #include "chord-tremolo-iterator.hh"
  17 #include "repeated-music.hh"
  18
  19 void
  20 Chord_tremolo_iterator::construct_children ()
  21 {
  22   Repeated_music * rep = dynamic_cast<Repeated_music*> (music_l_);
  23   factor_  = Moment (1, rep->repeats_i_);
  24   child_iter_p_ = get_iterator_p (rep->body ());
  25 }
  26
  27 Chord_tremolo_iterator::Chord_tremolo_iterator()
  28 {
  29   factor_ = 1;
  30   child_iter_p_ = 0;
  31 }
  32
  33 void
  34 Chord_tremolo_iterator::do_process_and_next (Moment m)
  35 {
  36   if (!m)
  37     {
  38       Music_iterator *yeah = try_music (music_l_);
  39       if (yeah)
  40         set_translator (yeah->report_to_l ());
  41       else
  42         music_l_->origin ()->warning ( _("no one to print a tremolos"));
  43     }
  44
  45   child_iter_p_->process_and_next  (factor_ * m);
  46 }
  47
  48
  49 Moment
  50 Chord_tremolo_iterator::next_moment () const
  51 {
  52   return child_iter_p_->next_moment () / factor_;
  53 }
  54
  55 bool
  56 Chord_tremolo_iterator::ok () const
  57 {
  58   return child_iter_p_ && child_iter_p_->ok();
  59 }
  60
  61 Chord_tremolo_iterator::~Chord_tremolo_iterator ()
  62 {
  63   delete child_iter_p_;
  64 }
  65
  66 Music_iterator*
  67 Chord_tremolo_iterator::try_music_in_children (Music  *m) const
  68 {
  69   return child_iter_p_->try_music (m);
  70 }
  71
  72
  73 void
  74 Chord_tremolo_iterator::do_print () const
  75 {
  76   child_iter_p_->print  ();
  77 }