lily/repeated-music-iterator.cc

   1 /*
   2   repeated-music-iterator.cc --  implement Repeated_music_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998 Jan Nieuwenhuizen <janneke@gnu.org>
   7
   8  */
   9
  10 #include "repeated-music-iterator.hh"
  11 #include "repeated-music.hh"
  12 #include "musical-request.hh"
  13 #include "translator-group.hh"
  14 #include "command-request.hh"
  15
  16 Repeated_music_iterator::Repeated_music_iterator ()
  17 {
  18   repeat_iter_p_ = 0;
  19   alternative_iter_p_ = 0;
  20 }
  21
  22 Repeated_music_iterator::~Repeated_music_iterator ()
  23 {
  24   delete repeat_iter_p_;
  25   delete alternative_iter_p_;
  26 }
  27
  28 void
  29 Repeated_music_iterator::do_print () const
  30 {
  31   if (repeat_iter_p_) repeat_iter_p_->print ();
  32   if (alternative_iter_p_) alternative_iter_p_->print ();
  33 }
  34
  35 void
  36 Repeated_music_iterator::construct_children ()
  37 {
  38   repeat_iter_p_ = get_iterator_p (repeated_music_l ()->repeat_p_);
  39 }
  40
  41 void
  42 Repeated_music_iterator::do_process_and_next (Moment m)
  43 {
  44   if (first_b_)
  45     {
  46       bool success = report_to_l ()->try_music (repeated_music_l ());
  47       if (!success)
  48         music_l_->warning ( _("No one to print a volta bracket"));
  49     }
  50   if (repeat_iter_p_ && repeat_iter_p_->ok ())
  51     repeat_iter_p_->process_and_next (m);
  52   else
  53     alternative_iter_p_->process_and_next (m -
  54       repeated_music_l ()->repeat_p_->duration ());
  55   Music_iterator::do_process_and_next (m);
  56 }
  57
  58 Moment
  59 Repeated_music_iterator::next_moment () const
  60 {
  61   if (repeat_iter_p_)
  62     return repeat_iter_p_->next_moment ();
  63   else if (alternative_iter_p_)
  64 //    return alternative_iter_p_->next_moment ();
  65     return alternative_iter_p_->next_moment () +
  66       repeated_music_l ()->repeat_p_->duration ();
  67 // return 0;
  68   return repeated_music_l ()->repeat_p_->duration ();
  69 }
  70
  71 bool
  72 Repeated_music_iterator::ok () const
  73 {
  74 #if 0
  75   if (repeat_iter_p_)
  76     return repeat_iter_p_->ok ();
  77   else if (alternative_iter_p_)
  78     return alternative_iter_p_->ok ();
  79   return false;
  80 #elif 0
  81   if (repeat_iter_p_ && repeat_iter_p_->ok ())
  82     return true;
  83   else if (!alternative_iter_p_)
  84     return true;
  85   return alternative_iter_p_->ok ();
  86 #else // perhaps iterating stops because we return false on repeat_iter...
  87   if (repeat_iter_p_)
  88     {
  89       if (repeat_iter_p_->ok ())
  90         return true;
  91       else
  92         {
  93           // urg, we're const
  94           Repeated_music_iterator *urg = (Repeated_music_iterator*)this;
  95           delete urg->repeat_iter_p_;
  96           urg->repeat_iter_p_ = 0;
  97           urg->alternative_iter_p_ = dynamic_cast<Music_list_iterator*>
  98             (get_iterator_p ((Music*)repeated_music_l ()->alternative_p_));
  99         }
 100     }
 101   if (alternative_iter_p_)
 102     return alternative_iter_p_->ok ();
 103   return false;
 104 #endif
 105 }
 106
 107 Repeated_music*
 108 Repeated_music_iterator::repeated_music_l () const
 109 {
 110   return (Repeated_music*)Music_iterator::music_l_;
 111 }
 112