*** empty log message ***

[lilypond.git] / lily / old-lyric-combine-music-iterator.cc

diff --git a/lily/old-lyric-combine-music-iterator.cc b/lily/old-lyric-combine-music-iterator.cc
new file mode 100644 (file)
index 0000000..9d0e023
--- /dev/null
+++ b/lily/old-lyric-combine-music-iterator.cc
@@ -0,0 +1,207 @@
+/*
+  lyric-combine-music-iterator.cc -- implement Old_lyric_combine_music_iterator
+
+  source file of the GNU LilyPond music typesetter
+
+  (c) 1999--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+
+#include "context.hh"
+#include "music.hh"
+#include "note-head.hh"
+#include "grob.hh"
+#include "music-iterator.hh"
+
+class Old_lyric_combine_music_iterator : public Music_iterator
+{
+public:
+  Old_lyric_combine_music_iterator ();
+  Old_lyric_combine_music_iterator (Old_lyric_combine_music_iterator const &src);
+  DECLARE_SCHEME_CALLBACK (constructor, ());
+protected:
+  virtual void construct_children ();
+  virtual Moment pending_moment () const;
+  virtual void do_quit ();
+  virtual void process (Moment);
+  virtual Music_iterator *try_music_in_children (Music *) const;
+
+  virtual bool ok () const;
+  virtual void derived_mark () const;
+  virtual void derived_substitute (Context *, Context *);
+private:
+  bool get_busy_status () const;
+  bool melisma_busy ();
+  Music *get_combine_lyrics () const;
+  Music *get_combine_music () const;
+
+  Music_iterator *music_iter_;
+  Music_iterator *lyric_iter_;
+};
+
+bool
+melisma_busy (Context *tr)
+{
+  SCM melisma_properties = tr->get_property ("melismaBusyProperties");
+  bool busy = false;
+
+  for (; scm_is_pair (melisma_properties);
+       melisma_properties = scm_cdr (melisma_properties))
+    busy = busy || to_boolean (tr->internal_get_property (scm_car (melisma_properties)));
+
+  return busy;
+}
+
+/*
+  Ugh, why static?
+*/
+Music *busy_req;
+Music *melisma_playing_req;
+
+Old_lyric_combine_music_iterator::Old_lyric_combine_music_iterator ()
+{
+  music_iter_ = 0;
+  lyric_iter_ = 0;
+
+  if (!busy_req)
+    {
+      busy_req
+       = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
+      melisma_playing_req
+       = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
+    }
+}
+
+Moment
+Old_lyric_combine_music_iterator::pending_moment () const
+{
+  Moment musnext = music_iter_->pending_moment ();
+  return musnext;
+}
+
+bool
+Old_lyric_combine_music_iterator::ok () const
+{
+  return music_iter_->ok ();
+}
+
+void
+Old_lyric_combine_music_iterator::derived_mark ()const
+{
+  if (music_iter_)
+    scm_gc_mark (music_iter_->self_scm ());
+  if (lyric_iter_)
+    scm_gc_mark (lyric_iter_->self_scm ());
+}
+
+void
+Old_lyric_combine_music_iterator::derived_substitute (Context *f, Context *t)
+{
+  if (music_iter_)
+    music_iter_->substitute_outlet (f, t);
+  if (lyric_iter_)
+    lyric_iter_->substitute_outlet (f, t);
+}
+
+Music *
+Old_lyric_combine_music_iterator::get_combine_music () const
+{
+  SCM l = get_music ()->get_property ("elements");
+  if (!scm_is_pair (l))
+    return 0;
+  return unsmob_music (scm_car (l));
+}
+
+Music *
+Old_lyric_combine_music_iterator::get_combine_lyrics () const
+{
+  SCM l = get_music ()->get_property ("elements");
+  if (!scm_is_pair (l))
+    return 0;
+  l = scm_cdr (l);
+  if (!scm_is_pair (l))
+    return 0;
+  return unsmob_music (scm_car (l));
+}
+
+void
+Old_lyric_combine_music_iterator::construct_children ()
+{
+  music_iter_ = unsmob_iterator (get_iterator (get_combine_music ()));
+  lyric_iter_ = unsmob_iterator (get_iterator (get_combine_lyrics ()));
+}
+
+bool
+Old_lyric_combine_music_iterator::get_busy_status () const
+{
+  /*
+    We have to use both the event and the busyGrobs queue.  The
+    busyGrobs queue doesn't contain any notes that have started this
+    instant.  */
+  if (try_music (busy_req))
+    return true;
+
+  Context *tr = music_iter_->get_outlet ();
+
+  SCM grobs = tr->get_property ("busyGrobs");
+  Moment now = tr->now_mom ();
+  for (; scm_is_pair (grobs); grobs = scm_cdr (grobs))
+    {
+      SCM grob = scm_cdar (grobs);
+      Moment end = *unsmob_moment (scm_caar (grobs));
+
+      /*
+       This is slightly ugh: we are now confunding the frontend
+       (iterators) and the backend (note heads) */
+      if (end > now
+         && Note_head::has_interface (unsmob_grob (grob)))
+       return true;
+    }
+
+  return false;
+}
+
+bool
+Old_lyric_combine_music_iterator::melisma_busy ()
+{
+  /* We cannot read the property, since music_iter_->get_outlet () might
+     not be the context that sets the melisma properties, but rather a
+     parent context.  */
+  return music_iter_->try_music (melisma_playing_req);
+}
+
+void
+Old_lyric_combine_music_iterator::process (Moment m)
+{
+  Moment my_next = music_iter_->pending_moment ();
+  if (my_next > m)
+    return;
+
+  music_iter_->process (m);
+
+  if (get_busy_status () && !melisma_busy () && lyric_iter_->ok ())
+    {
+      Moment m = lyric_iter_->pending_moment ();
+      lyric_iter_->process (m);
+    }
+}
+
+void
+Old_lyric_combine_music_iterator::do_quit ()
+{
+  if (music_iter_)
+    music_iter_->quit ();
+  if (lyric_iter_)
+    lyric_iter_->quit ();
+}
+
+Music_iterator *
+Old_lyric_combine_music_iterator::try_music_in_children (Music *m) const
+{
+  Music_iterator *i = music_iter_->try_music (m);
+  if (i)
+    return i;
+  else
+    return lyric_iter_->try_music (m);
+}
+
+IMPLEMENT_CTOR_CALLBACK (Old_lyric_combine_music_iterator);