2 lyric-combine-music-iterator.cc -- implement Lyric_combine_music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "translator-group.hh"
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 VIRTUAL_COPY_CONS (Music_iterator);
21 Lyric_combine_music_iterator ();
22 Lyric_combine_music_iterator (Lyric_combine_music_iterator const&src);
23 DECLARE_SCHEME_CALLBACK(constructor, ());
25 virtual void construct_children ();
26 virtual Moment pending_moment () const;
27 virtual void do_quit();
28 virtual void process (Moment);
29 virtual Music_iterator *try_music_in_children (Music *) const;
31 virtual bool ok () const;
32 virtual void derived_mark () const;
34 bool get_busy_status ()const ;
37 Music_iterator * music_iter_;
38 Music_iterator * lyric_iter_;
47 Music *melisma_playing_req;
49 Lyric_combine_music_iterator::Lyric_combine_music_iterator ()
57 = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
59 = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
64 Lyric_combine_music_iterator::pending_moment () const
66 Moment musnext = music_iter_->pending_moment ();
71 Lyric_combine_music_iterator::ok () const
73 return music_iter_->ok ();
77 Lyric_combine_music_iterator::derived_mark()const
80 scm_gc_mark (music_iter_->self_scm());
82 scm_gc_mark (lyric_iter_->self_scm());
86 Lyric_combine_music_iterator::construct_children ()
88 Lyric_combine_music const * m = dynamic_cast<Lyric_combine_music const*> (get_music ());
90 music_iter_ = unsmob_iterator (get_iterator (m->get_music ()));
91 lyric_iter_ = unsmob_iterator (get_iterator (m->get_lyrics ()));
95 Lyric_combine_music_iterator::get_busy_status () const
98 We have to use both the event and the busyGrobs queue. The
99 busyGrobs queue doesn't contain any notes that have started this
101 if (try_music (busy_req))
104 Translator_group * tr = music_iter_->report_to ();
106 SCM grobs = tr->get_property ("busyGrobs");
107 Moment now = tr->now_mom();
108 for (; gh_pair_p (grobs); grobs = gh_cdr (grobs))
110 SCM grob = gh_cdar (grobs);
111 Moment end =*unsmob_moment (gh_caar (grobs));
115 This is slightly ugh: we are now confunding the frontend
116 (iterators) and the backend (note heads) */
118 && Note_head::has_interface (unsmob_grob (grob)))
127 Lyric_combine_music_iterator::melisma_busy ()
130 We can not read the property, since music_iter_->report_to() might
131 not be the context that sets the melisma properties, but rather a
134 return music_iter_->try_music (melisma_playing_req);
138 Lyric_combine_music_iterator::process (Moment m)
140 Moment my_next = music_iter_->pending_moment ();
144 music_iter_->process (m);
146 if (get_busy_status () && !melisma_busy () && lyric_iter_->ok ())
148 Moment m= lyric_iter_->pending_moment ();
149 lyric_iter_->process (m);
154 Lyric_combine_music_iterator::do_quit ()
162 Lyric_combine_music_iterator::Lyric_combine_music_iterator (Lyric_combine_music_iterator const & src)
163 : Music_iterator (src)
169 lyric_iter_ = src.lyric_iter_->clone ();
171 music_iter_ = src.music_iter_->clone ();
174 scm_gc_unprotect_object (lyric_iter_->self_scm());
176 scm_gc_unprotect_object (music_iter_->self_scm());
180 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
182 Music_iterator * i = music_iter_->try_music (m);
186 return lyric_iter_->try_music (m);
190 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);