lily/folded-repeat-iterator.cc

   1 /*
   2   repeated-music-iterator.cc --  implement Folded_repeat_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "folded-repeat-iterator.hh"
  11 #include "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 = try_music (music_l_);
  63       if (!success)
  64         music_l_->warning ( _("no one to print a repeat brace"));
  65     }
  66
  67   if (main_iter_p_)
  68     {
  69       main_iter_p_->process_and_next (m);
  70       if (!main_iter_p_->ok ())
  71         leave_body ();
  72     }
  73
  74   if (!main_iter_p_ && !alternative_iter_p_)
  75     {
  76       enter_alternative ();
  77     }
  78
  79   if (alternative_iter_p_)
  80     {
  81       alternative_iter_p_->process_and_next (m - main_length_mom_);
  82       if (!alternative_iter_p_->ok ())
  83         {
  84           delete alternative_iter_p_;
  85           alternative_iter_p_ =0;
  86         }
  87     }
  88 }
  89
  90 void
  91 Folded_repeat_iterator::leave_body ()
  92 {
  93   Repeated_music const *  mus = dynamic_cast<Repeated_music const*> (music_l_);
  94   delete main_iter_p_;
  95   main_iter_p_ = 0;
  96   main_length_mom_ +=  mus->repeat_body_p_->length_mom ();
  97 }
  98
  99 void
 100 Folded_repeat_iterator::enter_alternative ()
 101 {
 102   Repeated_music const *  mus = dynamic_cast<Repeated_music const*> (music_l_);
 103   if (mus->alternatives_p_)
 104     {
 105       Simultaneous_music_iterator * s = new Simultaneous_music_iterator;
 106       s->separate_contexts_b_ = true;
 107       s->init_translator (mus->alternatives_p_, report_to_l ());
 108
 109       alternative_iter_p_ = s;
 110       alternative_iter_p_->construct_children ();
 111     }
 112 }
 113
 114 void
 115 Folded_repeat_iterator::do_print () const
 116 {
 117 #ifndef NPRINT
 118 #endif
 119 }
 120
 121 Music_iterator*
 122 Folded_repeat_iterator::try_music_in_children (Music const* m) const
 123 {
 124   if (main_iter_p_)
 125     {
 126       return main_iter_p_->try_music (m);
 127     }
 128   if (alternative_iter_p_)
 129     return alternative_iter_p_->try_music (m);
 130   return 0;
 131 }