lily/repeated-music-iterator.cc

   1 /*
   2   new-repeated-music-iterator.cc --  implement Folded_repeat_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "folded-repeat-iterator.hh"
  11 #include "new-repeated-music.hh"
  12 #include "music-list.hh"
  13 #include "simultaneous-music-iterator.hh"
  14 #include "translator-group.hh"
  15
  16 Folded_repeat_iterator::Folded_repeat_iterator ()
  17 {
  18   main_iter_p_ = 0;
  19   alternative_iter_p_ = 0;
  20 }
  21
  22 bool
  23 Folded_repeat_iterator::ok () const
  24 {
  25   return main_iter_p_ || alternative_iter_p_;
  26 }
  27
  28 Folded_repeat_iterator::~Folded_repeat_iterator ()
  29 {
  30   delete main_iter_p_;
  31   delete alternative_iter_p_;
  32 }
  33
  34 Moment
  35 Folded_repeat_iterator::next_moment () const
  36 {
  37   if (main_iter_p_)
  38     {
  39       return main_iter_p_->next_moment ();
  40     }
  41   else
  42     return main_length_mom_ + alternative_iter_p_->next_moment ();
  43 }
  44
  45 void
  46 Folded_repeat_iterator::construct_children ()
  47 {
  48   Repeated_music const *  mus = dynamic_cast<Repeated_music const*> (music_l_);
  49   main_iter_p_ = get_iterator_p (mus->repeat_body_p_);
  50   if (!main_iter_p_->ok())
  51     {
  52       leave_body ();
  53       enter_alternative ();
  54     }
  55 }
  56
  57 void
  58 Folded_repeat_iterator::do_process_and_next (Moment m)
  59 {
  60   if (!m)
  61     {
  62       bool success = report_to_l ()->try_music (music_l_);
  63       if (!success)
  64         music_l_->warning ( _("No one to print a volta bracket"));
  65     }
  66
  67   Repeated_music const * mus = dynamic_cast<Repeated_music const*> (music_l_);
  68
  69   if (main_iter_p_)
  70     {
  71       main_iter_p_->process_and_next (m);
  72       if (!main_iter_p_->ok ())
  73         leave_body ();
  74     }
  75
  76   if (!main_iter_p_ && !alternative_iter_p_)
  77     {
  78       enter_alternative ();
  79     }
  80
  81   if (alternative_iter_p_)
  82     {
  83       alternative_iter_p_->process_and_next (m - main_length_mom_);
  84       if (!alternative_iter_p_->ok ())
  85         {
  86           delete alternative_iter_p_;
  87           alternative_iter_p_ =0;
  88         }
  89     }
  90 }
  91
  92 void
  93 Folded_repeat_iterator::leave_body ()
  94 {
  95   Repeated_music const *  mus = dynamic_cast<Repeated_music const*> (music_l_);
  96   delete main_iter_p_;
  97   main_iter_p_ = 0;
  98   main_length_mom_ +=  mus->repeat_body_p_->length_mom ();
  99 }
 100
 101 void
 102 Folded_repeat_iterator::enter_alternative ()
 103 {
 104   Repeated_music const *  mus = dynamic_cast<Repeated_music const*> (music_l_);
 105   if (mus->alternatives_p_)
 106     {
 107       Simultaneous_music_iterator * s = new Simultaneous_music_iterator;
 108       s->separate_contexts_b_ = true;
 109       s->init_translator (mus->alternatives_p_, report_to_l ());
 110
 111       alternative_iter_p_ = s;
 112       alternative_iter_p_->construct_children ();
 113     }
 114 }
 115
 116 void
 117 Folded_repeat_iterator::do_print () const
 118 {
 119 #ifndef NPRINT
 120 #endif
 121 }