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 "event.hh"
  14 #include "note-head.hh"
  15 #include "grob.hh"
  16
  17
  18 /*
  19   Ugh, why static?
  20  */
  21 Music *busy_req;
  22 Music *melisma_start_req;
  23 Music *melisma_stop_req;
  24 Music *melisma_playing_req;
  25
  26 Lyric_combine_music_iterator::Lyric_combine_music_iterator ()
  27 {
  28   if (!busy_req)
  29     {
  30       busy_req
  31         = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
  32       melisma_playing_req
  33         = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
  34       melisma_stop_req
  35         = make_music_by_name (ly_symbol2scm ("MelismaEvent"));
  36       melisma_start_req
  37         = make_music_by_name (ly_symbol2scm ("MelismaEvent"));
  38
  39       melisma_start_req->set_mus_property ("span-direction", gh_int2scm (START));
  40       melisma_stop_req->set_mus_property ("span-direction", gh_int2scm (STOP));
  41     }
  42
  43   music_iter_ =0;
  44   lyric_iter_ =0;
  45 }
  46
  47 Moment
  48 Lyric_combine_music_iterator::pending_moment () const
  49 {
  50   Moment musnext = music_iter_->pending_moment ();
  51   return musnext;
  52 }
  53
  54 bool
  55 Lyric_combine_music_iterator::ok () const
  56 {
  57   return music_iter_->ok ();
  58 }
  59
  60 void
  61 Lyric_combine_music_iterator::derived_mark()const
  62 {
  63   if (music_iter_)
  64     scm_gc_mark (music_iter_->self_scm());
  65   if (lyric_iter_)
  66     scm_gc_mark (lyric_iter_->self_scm());
  67 }
  68
  69 void
  70 Lyric_combine_music_iterator::construct_children ()
  71 {
  72   Lyric_combine_music const * m = dynamic_cast<Lyric_combine_music const*> (get_music ());
  73
  74   music_iter_ = unsmob_iterator (get_iterator (m->get_music ()));
  75   lyric_iter_ = unsmob_iterator (get_iterator (m->get_lyrics ()));
  76 }
  77
  78 bool
  79 Lyric_combine_music_iterator::get_busy_status () const
  80 {
  81   /*
  82     We have to use both the event and the busyGrobs queue.  The
  83     busyGrobs queue doesn't contain any notes that have started this
  84     instant.  */
  85   if (try_music (busy_req))
  86     return true;
  87
  88   Translator_group * tr = music_iter_->report_to ();
  89
  90   SCM grobs = tr->get_property ("busyGrobs");
  91   Moment now = tr->now_mom();
  92   for (; gh_pair_p (grobs); grobs = gh_cdr (grobs))
  93     {
  94       SCM grob = gh_cdar (grobs);
  95       Moment end  =*unsmob_moment (gh_caar (grobs));
  96
  97
  98       /*
  99         This is slightly ugh: we are now confunding the frontend
 100         (iterators) and the backend (note heads) */
 101       if (end > now
 102           && Note_head::has_interface (unsmob_grob (grob)))
 103         return true;
 104     }
 105
 106   return false;
 107 }
 108
 109 void
 110 Lyric_combine_music_iterator::process (Moment m)
 111 {
 112   Moment my_next = music_iter_->pending_moment ();
 113   if (my_next > m)
 114     return;
 115
 116   music_iter_->process (m);
 117
 118   if (get_busy_status ())
 119     {
 120       bool melisma_b = try_music (melisma_playing_req);
 121       if (!melisma_b)
 122         {
 123           if (lyric_iter_->ok ())
 124             {
 125               Moment m= lyric_iter_->pending_moment ();
 126               lyric_iter_->process (m);
 127             }
 128         }
 129     }
 130
 131 }
 132 void
 133 Lyric_combine_music_iterator::do_quit ()
 134 {
 135   if (music_iter_)
 136     music_iter_->quit();
 137   if (lyric_iter_)
 138     lyric_iter_->quit();
 139
 140 }
 141 Lyric_combine_music_iterator::Lyric_combine_music_iterator (Lyric_combine_music_iterator const & src)
 142     : Music_iterator (src)
 143 {
 144   lyric_iter_ = 0;
 145   music_iter_ = 0;
 146
 147   if (src.lyric_iter_)
 148     lyric_iter_ =  src.lyric_iter_->clone ();
 149   if (src.music_iter_)
 150     music_iter_ =  src.music_iter_->clone ();
 151
 152   if (lyric_iter_)
 153     scm_gc_unprotect_object (lyric_iter_->self_scm());
 154   if (music_iter_)
 155     scm_gc_unprotect_object (music_iter_->self_scm());
 156 }
 157
 158 Music_iterator*
 159 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
 160 {
 161   Music_iterator * i =  music_iter_->try_music (m);
 162   if (i)
 163     return i;
 164   else
 165     return lyric_iter_->try_music (m);
 166 }
 167
 168
 169 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);