lily/unfolded-repeat-iterator.cc

   1 /*
   2   unfolded-repeat-iterator.cc --  implement Unfolded_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
  11 #include "repeated-music.hh"
  12 #include "music-list.hh"
  13 #include "unfolded-repeat-iterator.hh"
  14 #include "debug.hh"
  15 #include "translator-group.hh"
  16
  17 Unfolded_repeat_iterator::~Unfolded_repeat_iterator ()
  18 {
  19   delete current_iter_p_;
  20 }
  21
  22 Unfolded_repeat_iterator::Unfolded_repeat_iterator ()
  23 {
  24   done_count_ =0;
  25   current_iter_p_ =0;
  26   do_main_b_ = false;
  27   alternative_count_i_ =0;
  28 }
  29
  30 /**
  31
  32 If we are in the body of the repeat always go to the current alternative.
  33
  34 If we are not in the body, then we are in an alternative.  If we are
  35 fully unfolding, advance the current alternative and go back to main.
  36 If we are semi-unfolding, advance the current alternative, and go to
  37 the  alternative just set.
  38
  39  */
  40 void
  41 Unfolded_repeat_iterator::next_element ()
  42 {
  43   Repeated_music const* mus =dynamic_cast<Repeated_music const*> (music_l_);
  44   delete current_iter_p_;
  45   current_iter_p_ =0;
  46
  47
  48   if (do_main_b_)
  49     {
  50       done_mom_ += mus->repeat_body_p_->length_mom ();
  51
  52       if (!mus->volta_fold_b_)
  53         done_count_ ++;
  54
  55       if (alternative_cons_l_)
  56         {
  57           current_iter_p_ = get_iterator_p (alternative_cons_l_->car_);
  58           do_main_b_ = false;
  59         }
  60       else if (done_count_ <  mus->repeats_i_ && !mus->volta_fold_b_)
  61         {
  62           current_iter_p_ = get_iterator_p (mus->repeat_body_p_);
  63           do_main_b_ = true;
  64         }
  65     }
  66   else
  67     {
  68       /*
  69         we're not in the main part. So we're either in an alternative, or
  70         we just finished.
  71       */
  72       if (alternative_cons_l_)
  73         {
  74           done_mom_ += alternative_cons_l_->car_->length_mom ();
  75
  76           if (mus->volta_fold_b_ ||
  77               mus->repeats_i_ - done_count_  < alternative_count_i_)
  78             alternative_cons_l_ = alternative_cons_l_->next_;
  79
  80           /*
  81             we've done the main body as well, but didn't go over the other
  82             increment.  */
  83           if (mus->volta_fold_b_)
  84             done_count_ ++;
  85         }
  86
  87       if (done_count_ < mus->repeats_i_ && alternative_cons_l_)
  88         {
  89           if (mus->volta_fold_b_)
  90             current_iter_p_ = get_iterator_p (alternative_cons_l_->car_);
  91           else
  92             {
  93               current_iter_p_ = get_iterator_p (mus->repeat_body_p_);
  94               do_main_b_ = true;
  95             }
  96         }
  97     }
  98 }
  99
 100
 101 bool
 102 Unfolded_repeat_iterator::ok () const
 103 {
 104   return current_iter_p_ ;
 105 }
 106
 107 Moment
 108 Unfolded_repeat_iterator::next_moment () const
 109 {
 110   return done_mom_ + current_iter_p_->next_moment ();
 111 }
 112
 113 void
 114 Unfolded_repeat_iterator::construct_children ()
 115 {
 116   Repeated_music const* mus =dynamic_cast<Repeated_music const*> (music_l_);
 117   alternative_cons_l_ = (mus->alternatives_p_)
 118     ? mus->alternatives_p_->music_p_list_p_->head_
 119     : 0;
 120
 121   for (Cons<Music> *p = alternative_cons_l_; p; p = p->next_)
 122     alternative_count_i_ ++;
 123
 124   if (mus->repeat_body_p_)
 125     {
 126       current_iter_p_  = get_iterator_p (mus->repeat_body_p_);
 127       do_main_b_ = true;
 128     }
 129   else if (alternative_cons_l_)
 130     {
 131       current_iter_p_ = get_iterator_p (alternative_cons_l_->car_);
 132       do_main_b_ = false;
 133     }
 134 }
 135
 136 void
 137 Unfolded_repeat_iterator::do_process_and_next (Moment m)
 138 {
 139   if (!m)
 140     {
 141       Music_iterator *yeah = try_music (music_l_);
 142       if (yeah)
 143         set_translator (yeah->report_to_l ());
 144       else
 145         music_l_->warning ( _("no one to print a volta bracket"));
 146     }
 147   while (1)
 148     {
 149       while (!current_iter_p_->ok ())
 150         {
 151           next_element();
 152
 153           if (!current_iter_p_)
 154             return;
 155         }
 156
 157       if (m - done_mom_ >= current_iter_p_->next_moment ())
 158         current_iter_p_->process_and_next (m - done_mom_);
 159       else
 160         return;
 161     }
 162 }
 163
 164 void
 165 Unfolded_repeat_iterator::do_print () const
 166 {
 167 #ifndef NPRINT
 168   DEBUG_OUT << "count " << done_count_ << "done time " << done_mom_ << '\n';
 169   DEBUG_OUT << "current: ";
 170   current_iter_p_->print();
 171 #endif
 172 }
 173
 174 Music_iterator*
 175 Unfolded_repeat_iterator::try_music_in_children (Music const * m) const
 176 {
 177   return  current_iter_p_->try_music (m);
 178 }