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>
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);
113 Lyric_combine_music_iterator::get_combine_music () const
115 SCM l = get_music()->get_property ("elements");
116 if (!scm_is_pair (l))
118 return unsmob_music (scm_car (l));
124 Lyric_combine_music_iterator::get_combine_lyrics () const
126 SCM l = get_music()->get_property ("elements");
127 if (!scm_is_pair (l))
130 if (!scm_is_pair (l))
132 return unsmob_music (scm_car (l));
137 Lyric_combine_music_iterator::construct_children ()
139 music_iter_ = unsmob_iterator (get_iterator (get_music ()->get_combine_music ()));
140 lyric_iter_ = unsmob_iterator (get_iterator (get_music ()->get_combine_lyrics ()));
144 Lyric_combine_music_iterator::get_busy_status () const
147 We have to use both the event and the busyGrobs queue. The
148 busyGrobs queue doesn't contain any notes that have started this
150 if (try_music (busy_req))
153 Context * tr = music_iter_->get_outlet ();
155 SCM grobs = tr->get_property ("busyGrobs");
156 Moment now = tr->now_mom ();
157 for (; scm_is_pair (grobs); grobs = scm_cdr (grobs))
159 SCM grob = scm_cdar (grobs);
160 Moment end =*unsmob_moment (scm_caar (grobs));
164 This is slightly ugh: we are now confunding the frontend
165 (iterators) and the backend (note heads) */
167 && Note_head::has_interface (unsmob_grob (grob)))
176 Lyric_combine_music_iterator::melisma_busy ()
179 We can not read the property, since music_iter_->get_outlet () might
180 not be the context that sets the melisma properties, but rather a
183 return music_iter_->try_music (melisma_playing_req);
187 Lyric_combine_music_iterator::process (Moment m)
189 Moment my_next = music_iter_->pending_moment ();
193 music_iter_->process (m);
195 if (get_busy_status () && !melisma_busy () && lyric_iter_->ok ())
197 Moment m = lyric_iter_->pending_moment ();
198 lyric_iter_->process (m);
203 Lyric_combine_music_iterator::do_quit ()
206 music_iter_->quit ();
208 lyric_iter_->quit ();
212 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
214 Music_iterator * i = music_iter_->try_music (m);
218 return lyric_iter_->try_music (m);
222 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);