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_;
43 melisma_busy (Context* tr)
45 SCM melisma_properties = tr->get_property ("melismaBusyProperties");
48 for (; scm_is_pair (melisma_properties);
49 melisma_properties = scm_cdr (melisma_properties))
50 busy = busy || to_boolean (tr->internal_get_property (scm_car (melisma_properties)));
61 Music *melisma_playing_req;
63 Lyric_combine_music_iterator::Lyric_combine_music_iterator ()
71 = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
73 = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
78 Lyric_combine_music_iterator::pending_moment () const
80 Moment musnext = music_iter_->pending_moment ();
85 Lyric_combine_music_iterator::ok () const
87 return music_iter_->ok ();
91 Lyric_combine_music_iterator::derived_mark ()const
94 scm_gc_mark (music_iter_->self_scm ());
96 scm_gc_mark (lyric_iter_->self_scm ());
100 Lyric_combine_music_iterator::derived_substitute (Context *f,Context * t)
103 music_iter_->substitute_outlet (f,t);
105 lyric_iter_->substitute_outlet (f,t);
109 Lyric_combine_music_iterator::construct_children ()
111 Lyric_combine_music const * m = dynamic_cast<Lyric_combine_music const*> (get_music ());
113 music_iter_ = unsmob_iterator (get_iterator (m->get_music ()));
114 lyric_iter_ = unsmob_iterator (get_iterator (m->get_lyrics ()));
118 Lyric_combine_music_iterator::get_busy_status () const
121 We have to use both the event and the busyGrobs queue. The
122 busyGrobs queue doesn't contain any notes that have started this
124 if (try_music (busy_req))
127 Context * tr = music_iter_->get_outlet ();
129 SCM grobs = tr->get_property ("busyGrobs");
130 Moment now = tr->now_mom ();
131 for (; scm_is_pair (grobs); grobs = scm_cdr (grobs))
133 SCM grob = scm_cdar (grobs);
134 Moment end =*unsmob_moment (scm_caar (grobs));
138 This is slightly ugh: we are now confunding the frontend
139 (iterators) and the backend (note heads) */
141 && Note_head::has_interface (unsmob_grob (grob)))
150 Lyric_combine_music_iterator::melisma_busy ()
153 We can not read the property, since music_iter_->get_outlet () might
154 not be the context that sets the melisma properties, but rather a
157 return music_iter_->try_music (melisma_playing_req);
161 Lyric_combine_music_iterator::process (Moment m)
163 Moment my_next = music_iter_->pending_moment ();
167 music_iter_->process (m);
169 if (get_busy_status () && !melisma_busy () && lyric_iter_->ok ())
171 Moment m= lyric_iter_->pending_moment ();
172 lyric_iter_->process (m);
177 Lyric_combine_music_iterator::do_quit ()
180 music_iter_->quit ();
182 lyric_iter_->quit ();
186 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
188 Music_iterator * i = music_iter_->try_music (m);
192 return lyric_iter_->try_music (m);
196 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);