2 lyric-combine-music-iterator.cc -- implement Lyric_combine_music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2002 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 ;
38 Music_iterator * music_iter_;
39 Music_iterator * lyric_iter_;
48 Music *melisma_playing_req;
50 Lyric_combine_music_iterator::Lyric_combine_music_iterator ()
55 = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
57 = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
65 Lyric_combine_music_iterator::pending_moment () const
67 Moment musnext = music_iter_->pending_moment ();
72 Lyric_combine_music_iterator::ok () const
74 return music_iter_->ok ();
78 Lyric_combine_music_iterator::derived_mark()const
81 scm_gc_mark (music_iter_->self_scm());
83 scm_gc_mark (lyric_iter_->self_scm());
87 Lyric_combine_music_iterator::construct_children ()
89 Lyric_combine_music const * m = dynamic_cast<Lyric_combine_music const*> (get_music ());
91 music_iter_ = unsmob_iterator (get_iterator (m->get_music ()));
92 lyric_iter_ = unsmob_iterator (get_iterator (m->get_lyrics ()));
96 Lyric_combine_music_iterator::get_busy_status () const
99 We have to use both the event and the busyGrobs queue. The
100 busyGrobs queue doesn't contain any notes that have started this
102 if (try_music (busy_req))
105 Translator_group * tr = music_iter_->report_to ();
107 SCM grobs = tr->get_property ("busyGrobs");
108 Moment now = tr->now_mom();
109 for (; gh_pair_p (grobs); grobs = gh_cdr (grobs))
111 SCM grob = gh_cdar (grobs);
112 Moment end =*unsmob_moment (gh_caar (grobs));
116 This is slightly ugh: we are now confunding the frontend
117 (iterators) and the backend (note heads) */
119 && Note_head::has_interface (unsmob_grob (grob)))
128 Lyric_combine_music_iterator::melisma_busy ()
132 Translator_group * trg = music_iter_->report_to();
133 bool melisma_busy= to_boolean (trg->get_property ("melismaBusy"));
135 melisma_busy = melisma_busy || to_boolean (trg->get_property ("slurMelismaBusy"));
136 melisma_busy = melisma_busy || to_boolean (trg->get_property ("tieMelismaBusy"));
137 melisma_busy = melisma_busy || to_boolean (trg->get_property ("beamMelismaBusy"));
143 The above code is nicer since it doesn't rely on a special
144 engraver to signal the melisma status. Unfortunately,
145 music_iter_->report_to() might not be the context that sets the
146 melisma properties, but rather a parent context.
148 return music_iter_->try_music (melisma_playing_req);
154 Lyric_combine_music_iterator::process (Moment m)
156 Moment my_next = music_iter_->pending_moment ();
160 music_iter_->process (m);
162 if (get_busy_status () && !melisma_busy () && lyric_iter_->ok ())
164 Moment m= lyric_iter_->pending_moment ();
165 lyric_iter_->process (m);
170 Lyric_combine_music_iterator::do_quit ()
178 Lyric_combine_music_iterator::Lyric_combine_music_iterator (Lyric_combine_music_iterator const & src)
179 : Music_iterator (src)
185 lyric_iter_ = src.lyric_iter_->clone ();
187 music_iter_ = src.music_iter_->clone ();
190 scm_gc_unprotect_object (lyric_iter_->self_scm());
192 scm_gc_unprotect_object (music_iter_->self_scm());
196 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
198 Music_iterator * i = music_iter_->try_music (m);
202 return lyric_iter_->try_music (m);
206 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);