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>
12 #include "note-head.hh"
14 #include "music-iterator.hh"
16 class Lyric_combine_music_iterator : public Music_iterator
19 Lyric_combine_music_iterator ();
20 Lyric_combine_music_iterator (Lyric_combine_music_iterator const&src);
21 DECLARE_SCHEME_CALLBACK (constructor, ());
23 virtual void construct_children ();
24 virtual Moment pending_moment () const;
25 virtual void do_quit ();
26 virtual void process (Moment);
27 virtual Music_iterator *try_music_in_children (Music *) const;
29 virtual bool ok () const;
30 virtual void derived_mark () const;
31 virtual void derived_substitute (Context *, Context *) ;
33 bool get_busy_status ()const ;
35 Music* get_combine_lyrics () const;
36 Music* get_combine_music () const;
39 Music_iterator * music_iter_;
40 Music_iterator * lyric_iter_;
45 melisma_busy (Context* tr)
47 SCM melisma_properties = tr->get_property ("melismaBusyProperties");
50 for (; scm_is_pair (melisma_properties);
51 melisma_properties = scm_cdr (melisma_properties))
52 busy = busy || to_boolean (tr->internal_get_property (scm_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::get_combine_music () const
113 SCM l = get_music ()->get_property ("elements");
114 if (!scm_is_pair (l))
116 return unsmob_music (scm_car (l));
120 Lyric_combine_music_iterator::get_combine_lyrics () const
122 SCM l = get_music ()->get_property ("elements");
123 if (!scm_is_pair (l))
126 if (!scm_is_pair (l))
128 return unsmob_music (scm_car (l));
133 Lyric_combine_music_iterator::construct_children ()
135 music_iter_ = unsmob_iterator (get_iterator (get_combine_music ()));
136 lyric_iter_ = unsmob_iterator (get_iterator (get_combine_lyrics ()));
140 Lyric_combine_music_iterator::get_busy_status () const
143 We have to use both the event and the busyGrobs queue. The
144 busyGrobs queue doesn't contain any notes that have started this
146 if (try_music (busy_req))
149 Context * tr = music_iter_->get_outlet ();
151 SCM grobs = tr->get_property ("busyGrobs");
152 Moment now = tr->now_mom ();
153 for (; scm_is_pair (grobs); grobs = scm_cdr (grobs))
155 SCM grob = scm_cdar (grobs);
156 Moment end =*unsmob_moment (scm_caar (grobs));
160 This is slightly ugh: we are now confunding the frontend
161 (iterators) and the backend (note heads) */
163 && Note_head::has_interface (unsmob_grob (grob)))
172 Lyric_combine_music_iterator::melisma_busy ()
175 We can not read the property, since music_iter_->get_outlet () might
176 not be the context that sets the melisma properties, but rather a
179 return music_iter_->try_music (melisma_playing_req);
183 Lyric_combine_music_iterator::process (Moment m)
185 Moment my_next = music_iter_->pending_moment ();
189 music_iter_->process (m);
191 if (get_busy_status () && !melisma_busy () && lyric_iter_->ok ())
193 Moment m = lyric_iter_->pending_moment ();
194 lyric_iter_->process (m);
199 Lyric_combine_music_iterator::do_quit ()
202 music_iter_->quit ();
204 lyric_iter_->quit ();
208 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
210 Music_iterator * i = music_iter_->try_music (m);
214 return lyric_iter_->try_music (m);
218 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);