2 lyric-combine-music-iterator.cc -- implement Lyric_combine_music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "lyric-combine-music.hh"
13 #include "note-head.hh"
15 #include "music-iterator.hh"
17 class Lyric_combine_music_iterator : public Music_iterator
20 Lyric_combine_music_iterator ();
21 Lyric_combine_music_iterator (Lyric_combine_music_iterator const&src);
22 DECLARE_SCHEME_CALLBACK(constructor, ());
24 virtual void construct_children ();
25 virtual Moment pending_moment () const;
26 virtual void do_quit();
27 virtual void process (Moment);
28 virtual Music_iterator *try_music_in_children (Music *) const;
30 virtual bool ok () const;
31 virtual void derived_mark () const;
32 virtual void derived_substitute (Context *,Context *) ;
34 bool get_busy_status ()const ;
37 Music_iterator * music_iter_;
38 Music_iterator * lyric_iter_;
42 #include "translator.hh"
45 melisma_busy (Translator* tr)
47 SCM melisma_properties = tr->daddy_context_->get_property ("melismaBusyProperties");
50 for (; gh_pair_p (melisma_properties);
51 melisma_properties = gh_cdr (melisma_properties))
52 busy = busy || to_boolean (tr->internal_get_property (gh_car (melisma_properties)));
63 Music *melisma_playing_req;
65 Lyric_combine_music_iterator::Lyric_combine_music_iterator ()
73 = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
75 = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
80 Lyric_combine_music_iterator::pending_moment () const
82 Moment musnext = music_iter_->pending_moment ();
87 Lyric_combine_music_iterator::ok () const
89 return music_iter_->ok ();
93 Lyric_combine_music_iterator::derived_mark()const
96 scm_gc_mark (music_iter_->self_scm());
98 scm_gc_mark (lyric_iter_->self_scm());
102 Lyric_combine_music_iterator::derived_substitute (Context *f,Context * t)
105 music_iter_->substitute_outlet (f,t);
107 lyric_iter_->substitute_outlet (f,t);
111 Lyric_combine_music_iterator::construct_children ()
113 Lyric_combine_music const * m = dynamic_cast<Lyric_combine_music const*> (get_music ());
115 music_iter_ = unsmob_iterator (get_iterator (m->get_music ()));
116 lyric_iter_ = unsmob_iterator (get_iterator (m->get_lyrics ()));
120 Lyric_combine_music_iterator::get_busy_status () const
123 We have to use both the event and the busyGrobs queue. The
124 busyGrobs queue doesn't contain any notes that have started this
126 if (try_music (busy_req))
129 Context * tr = music_iter_->get_outlet ();
131 SCM grobs = tr->get_property ("busyGrobs");
132 Moment now = tr->now_mom();
133 for (; gh_pair_p (grobs); grobs = gh_cdr (grobs))
135 SCM grob = gh_cdar (grobs);
136 Moment end =*unsmob_moment (gh_caar (grobs));
140 This is slightly ugh: we are now confunding the frontend
141 (iterators) and the backend (note heads) */
143 && Note_head::has_interface (unsmob_grob (grob)))
152 Lyric_combine_music_iterator::melisma_busy ()
155 We can not read the property, since music_iter_->get_outlet () might
156 not be the context that sets the melisma properties, but rather a
159 return music_iter_->try_music (melisma_playing_req);
163 Lyric_combine_music_iterator::process (Moment m)
165 Moment my_next = music_iter_->pending_moment ();
169 music_iter_->process (m);
171 if (get_busy_status () && !melisma_busy () && lyric_iter_->ok ())
173 Moment m= lyric_iter_->pending_moment ();
174 lyric_iter_->process (m);
179 Lyric_combine_music_iterator::do_quit ()
188 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
190 Music_iterator * i = music_iter_->try_music (m);
194 return lyric_iter_->try_music (m);
198 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);