lily/lyric-combine-music-iterator.cc

   1 /*
   2   lyric-combine-music-iterator.cc --  implement Lyric_combine_music_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "translator-group.hh"
  11 #include "lyric-combine-music-iterator.hh"
  12 #include "lyric-combine-music.hh"
  13 #include "musical-request.hh"
  14 #include "note-head.hh"
  15 #include "grob.hh"
  16
  17
  18 /*
  19   Ugh, why static?
  20  */
  21 Busy_playing_req *busy_req;
  22 Melisma_req *melisma_start_req;
  23 Melisma_req *melisma_stop_req;
  24 Melisma_playing_req * melisma_playing_req;
  25
  26 Lyric_combine_music_iterator::Lyric_combine_music_iterator ()
  27 {
  28   if (!busy_req)
  29     {
  30       busy_req = new Busy_playing_req;
  31       melisma_playing_req = new Melisma_playing_req;
  32       melisma_stop_req = new Melisma_req;
  33       melisma_start_req = new Melisma_req;
  34       melisma_start_req->set_span_dir (START);
  35       melisma_stop_req->set_span_dir (STOP);
  36     }
  37
  38   music_iter_ =0;
  39   lyric_iter_ =0;
  40 }
  41
  42 Moment
  43 Lyric_combine_music_iterator::pending_moment () const
  44 {
  45   Moment musnext = music_iter_->pending_moment ();
  46   return musnext;
  47 }
  48
  49 bool
  50 Lyric_combine_music_iterator::ok () const
  51 {
  52   return music_iter_->ok ();
  53 }
  54
  55 void
  56 Lyric_combine_music_iterator::derived_mark()const
  57 {
  58   if (music_iter_)
  59     scm_gc_mark (music_iter_->self_scm());
  60   if (lyric_iter_)
  61     scm_gc_mark (lyric_iter_->self_scm());
  62 }
  63
  64 void
  65 Lyric_combine_music_iterator::construct_children ()
  66 {
  67   Lyric_combine_music const * m = dynamic_cast<Lyric_combine_music const*> (get_music ());
  68
  69   music_iter_ = unsmob_iterator (get_iterator (m->get_music ()));
  70   lyric_iter_ = unsmob_iterator (get_iterator (m->get_lyrics ()));
  71 }
  72
  73 bool
  74 Lyric_combine_music_iterator::get_busy_status () const
  75 {
  76   /*
  77     We have to use both the request and the busyGrobs queue.  The
  78     busyGrobs queue doesn't contain any notes that have started this
  79     instant.  */
  80   if (try_music (busy_req))
  81     return true;
  82
  83   Translator_group * tr = music_iter_->report_to ();
  84
  85   SCM grobs = tr->get_property ("busyGrobs");
  86   Moment now = tr->now_mom();
  87   for (; gh_pair_p (grobs); grobs = gh_cdr (grobs))
  88     {
  89       SCM grob = gh_cdar (grobs);
  90       Moment end  =*unsmob_moment (gh_caar (grobs));
  91
  92
  93       /*
  94         This is slightly ugh: we are now confunding the frontend
  95         (iterators) and the backend (note heads) */
  96       if (end > now
  97           && Note_head::has_interface (unsmob_grob (grob)))
  98         return true;
  99     }
 100
 101   return false;
 102 }
 103
 104 void
 105 Lyric_combine_music_iterator::process (Moment m)
 106 {
 107   Moment my_next = music_iter_->pending_moment ();
 108   if (my_next > m)
 109     return;
 110
 111   music_iter_->process (m);
 112
 113   if (get_busy_status ())
 114     {
 115       bool melisma_b = try_music (melisma_playing_req);
 116       if (!melisma_b)
 117         {
 118           if (lyric_iter_->ok ())
 119             {
 120               Moment m= lyric_iter_->pending_moment ();
 121               lyric_iter_->process (m);
 122             }
 123         }
 124     }
 125
 126 }
 127 void
 128 Lyric_combine_music_iterator::do_quit ()
 129 {
 130   if (music_iter_)
 131     music_iter_->quit();
 132   if (lyric_iter_)
 133     lyric_iter_->quit();
 134
 135 }
 136 Lyric_combine_music_iterator::Lyric_combine_music_iterator (Lyric_combine_music_iterator const & src)
 137     : Music_iterator (src)
 138 {
 139   lyric_iter_ = src.lyric_iter_ ? src.lyric_iter_->clone () : 0;
 140   music_iter_ = src.music_iter_ ? src.music_iter_->clone () : 0;
 141
 142   if (lyric_iter_)
 143     scm_gc_unprotect_object (lyric_iter_->self_scm());
 144   if (music_iter_)
 145     scm_gc_unprotect_object (music_iter_->self_scm());
 146 }
 147
 148 Music_iterator*
 149 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
 150 {
 151   Music_iterator * i =  music_iter_->try_music (m);
 152   if (i)
 153     return i;
 154   else
 155     return lyric_iter_->try_music (m);
 156 }
 157
 158
 159 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);