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--2001 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 (Rational(1, rep->repeat_count ()));
  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 Chord_tremolo_iterator::Chord_tremolo_iterator (Chord_tremolo_iterator const &src)
  34   : Music_iterator (src)
  35 {
  36   child_iter_p_ = src.child_iter_p_? src.child_iter_p_->clone () : 0;
  37 }
  38
  39 void
  40 Chord_tremolo_iterator::process (Moment m)
  41 {
  42   if (!m.to_bool () )
  43     {
  44       Music_iterator *yeah = try_music (music_l ());
  45       if (yeah)
  46         set_translator (yeah->report_to_l ());
  47       else
  48         music_l ()->origin ()->warning (_ ("no one to print a tremolos"));
  49     }
  50
  51   child_iter_p_->process (factor_ * m);
  52 }
  53
  54
  55 Moment
  56 Chord_tremolo_iterator::pending_moment () const
  57 {
  58   return child_iter_p_->pending_moment () / factor_;
  59 }
  60
  61 bool
  62 Chord_tremolo_iterator::ok () const
  63 {
  64   return child_iter_p_ && child_iter_p_->ok ();
  65 }
  66
  67 Chord_tremolo_iterator::~Chord_tremolo_iterator ()
  68 {
  69   delete child_iter_p_;
  70 }
  71
  72 Music_iterator*
  73 Chord_tremolo_iterator::try_music_in_children (Music  *m) const
  74 {
  75   return child_iter_p_->try_music (m);
  76 }
  77
  78
  79
  80 IMPLEMENT_CTOR_CALLBACK (Chord_tremolo_iterator);
  81