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     }
  35   melisma_start_req->set_span_dir (START);
  36   melisma_stop_req->set_span_dir (STOP);
  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
  56 void
  57 Lyric_combine_music_iterator::construct_children ()
  58 {
  59   Lyric_combine_music const * m = dynamic_cast<Lyric_combine_music const*> (get_music ());
  60
  61   music_iter_ = get_iterator (m->get_music ());
  62   lyric_iter_ = get_iterator (m->get_lyrics ());
  63 }
  64
  65 bool
  66 Lyric_combine_music_iterator::get_busy_status () const
  67 {
  68   /*
  69     We have to use both the request and the busyGrobs queue.  The
  70     busyGrobs queue doesn't contain any notes that have started this
  71     instant.  */
  72   if (try_music (busy_req))
  73     return true;
  74
  75   Translator_group * tr = music_iter_->report_to ();
  76
  77   SCM grobs = tr->get_property ("busyGrobs");
  78   Moment now = tr->now_mom();
  79   for (; gh_pair_p (grobs); grobs = gh_cdr (grobs))
  80     {
  81       SCM grob = gh_cdar (grobs);
  82       Moment end  =*unsmob_moment (gh_caar (grobs));
  83
  84
  85       /*
  86         This is slightly ugh: we are now confunding the frontend
  87         (iterators) and the backend (note heads) */
  88       if (end > now
  89           && Note_head::has_interface (unsmob_grob (grob)))
  90         return true;
  91     }
  92
  93   return false;
  94 }
  95
  96 void
  97 Lyric_combine_music_iterator::process (Moment m)
  98 {
  99   Moment my_next = music_iter_->pending_moment ();
 100   if (my_next > m)
 101     return;
 102
 103   music_iter_->process (m);
 104
 105   if ( get_busy_status ())
 106     {
 107       bool melisma_b = try_music (melisma_playing_req);
 108       if (!melisma_b)
 109         {
 110           if (lyric_iter_->ok ())
 111             {
 112               // FIXME
 113 #if 0                           // devise a new way for this
 114               if (melisma_b && !melisma_started_b_)
 115                 lyric_iter_->try_music (melisma_start_req);
 116               else if (melisma_started_b_)
 117                 lyric_iter_->try_music (melisma_stop_req);
 118 #endif
 119
 120               Moment m= lyric_iter_->pending_moment ();
 121               lyric_iter_->process (m);
 122             }
 123         }
 124     }
 125
 126 }
 127
 128 Lyric_combine_music_iterator::~Lyric_combine_music_iterator ()
 129 {
 130   delete lyric_iter_;
 131   delete music_iter_;
 132 }
 133
 134 Lyric_combine_music_iterator::Lyric_combine_music_iterator (Lyric_combine_music_iterator const & src)
 135     : Music_iterator (src)
 136 {
 137   lyric_iter_ = src.lyric_iter_ ? src.lyric_iter_->clone () : 0;
 138   music_iter_ = src.music_iter_ ? src.music_iter_->clone () : 0;
 139 }
 140
 141 Music_iterator*
 142 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
 143 {
 144   Music_iterator * i =  music_iter_->try_music (m);
 145   if (i)
 146     return i;
 147   else
 148     return lyric_iter_->try_music (m);
 149 }
 150
 151
 152 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);