2 lyric-combine-music-iterator.cc -- implement Lyric_combine_music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "note-head.hh"
13 #include "music-iterator.hh"
15 class Lyric_combine_music_iterator : public Music_iterator
18 Lyric_combine_music_iterator ();
19 Lyric_combine_music_iterator (Lyric_combine_music_iterator const &src);
20 DECLARE_SCHEME_CALLBACK (constructor, ());
22 virtual void construct_children ();
23 virtual Moment pending_moment () const;
24 virtual void do_quit ();
25 virtual void process (Moment);
26 virtual Music_iterator *try_music_in_children (Music *) const;
28 virtual bool ok () const;
29 virtual void derived_mark () const;
30 virtual void derived_substitute (Context *, Context *);
32 bool get_busy_status ()const;
34 Music *get_combine_lyrics () const;
35 Music *get_combine_music () const;
37 Music_iterator *music_iter_;
38 Music_iterator *lyric_iter_;
42 melisma_busy (Context *tr)
44 SCM melisma_properties = tr->get_property ("melismaBusyProperties");
47 for (; scm_is_pair (melisma_properties);
48 melisma_properties = scm_cdr (melisma_properties))
49 busy = busy || to_boolean (tr->internal_get_property (scm_car (melisma_properties)));
58 Music *melisma_playing_req;
60 Lyric_combine_music_iterator::Lyric_combine_music_iterator ()
68 = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
70 = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
75 Lyric_combine_music_iterator::pending_moment () const
77 Moment musnext = music_iter_->pending_moment ();
82 Lyric_combine_music_iterator::ok () const
84 return music_iter_->ok ();
88 Lyric_combine_music_iterator::derived_mark ()const
91 scm_gc_mark (music_iter_->self_scm ());
93 scm_gc_mark (lyric_iter_->self_scm ());
97 Lyric_combine_music_iterator::derived_substitute (Context *f, Context *t)
100 music_iter_->substitute_outlet (f, t);
102 lyric_iter_->substitute_outlet (f, t);
106 Lyric_combine_music_iterator::get_combine_music () const
108 SCM l = get_music ()->get_property ("elements");
109 if (!scm_is_pair (l))
111 return unsmob_music (scm_car (l));
115 Lyric_combine_music_iterator::get_combine_lyrics () const
117 SCM l = get_music ()->get_property ("elements");
118 if (!scm_is_pair (l))
121 if (!scm_is_pair (l))
123 return unsmob_music (scm_car (l));
127 Lyric_combine_music_iterator::construct_children ()
129 music_iter_ = unsmob_iterator (get_iterator (get_combine_music ()));
130 lyric_iter_ = unsmob_iterator (get_iterator (get_combine_lyrics ()));
134 Lyric_combine_music_iterator::get_busy_status () const
137 We have to use both the event and the busyGrobs queue. The
138 busyGrobs queue doesn't contain any notes that have started this
140 if (try_music (busy_req))
143 Context *tr = music_iter_->get_outlet ();
145 SCM grobs = tr->get_property ("busyGrobs");
146 Moment now = tr->now_mom ();
147 for (; scm_is_pair (grobs); grobs = scm_cdr (grobs))
149 SCM grob = scm_cdar (grobs);
150 Moment end = *unsmob_moment (scm_caar (grobs));
153 This is slightly ugh: we are now confunding the frontend
154 (iterators) and the backend (note heads) */
156 && Note_head::has_interface (unsmob_grob (grob)))
164 Lyric_combine_music_iterator::melisma_busy ()
166 /* We cannot read the property, since music_iter_->get_outlet () might
167 not be the context that sets the melisma properties, but rather a
169 return music_iter_->try_music (melisma_playing_req);
173 Lyric_combine_music_iterator::process (Moment m)
175 Moment my_next = music_iter_->pending_moment ();
179 music_iter_->process (m);
181 if (get_busy_status () && !melisma_busy () && lyric_iter_->ok ())
183 Moment m = lyric_iter_->pending_moment ();
184 lyric_iter_->process (m);
189 Lyric_combine_music_iterator::do_quit ()
192 music_iter_->quit ();
194 lyric_iter_->quit ();
198 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
200 Music_iterator *i = music_iter_->try_music (m);
204 return lyric_iter_->try_music (m);
207 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);