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_;
43 melisma_busy (Translator* tr)
45 SCM melisma_properties = tr->get_property ("melismaBusyProperties");
48 for (; gh_pair_p (melisma_properties);
49 melisma_properties = gh_cdr (melisma_properties))
50 busy = busy || to_boolean (tr->internal_get_property (gh_car (melisma_properties)));
61 Music *melisma_playing_req;
63 Lyric_combine_music_iterator::Lyric_combine_music_iterator ()
71 = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
73 = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
78 Lyric_combine_music_iterator::pending_moment () const
80 Moment musnext = music_iter_->pending_moment ();
85 Lyric_combine_music_iterator::ok () const
87 return music_iter_->ok ();
91 Lyric_combine_music_iterator::derived_mark()const
94 scm_gc_mark (music_iter_->self_scm());
96 scm_gc_mark (lyric_iter_->self_scm());
100 Lyric_combine_music_iterator::construct_children ()
102 Lyric_combine_music const * m = dynamic_cast<Lyric_combine_music const*> (get_music ());
104 music_iter_ = unsmob_iterator (get_iterator (m->get_music ()));
105 lyric_iter_ = unsmob_iterator (get_iterator (m->get_lyrics ()));
109 Lyric_combine_music_iterator::get_busy_status () const
112 We have to use both the event and the busyGrobs queue. The
113 busyGrobs queue doesn't contain any notes that have started this
115 if (try_music (busy_req))
118 Translator_group * tr = music_iter_->report_to ();
120 SCM grobs = tr->get_property ("busyGrobs");
121 Moment now = tr->now_mom();
122 for (; gh_pair_p (grobs); grobs = gh_cdr (grobs))
124 SCM grob = gh_cdar (grobs);
125 Moment end =*unsmob_moment (gh_caar (grobs));
129 This is slightly ugh: we are now confunding the frontend
130 (iterators) and the backend (note heads) */
132 && Note_head::has_interface (unsmob_grob (grob)))
141 Lyric_combine_music_iterator::melisma_busy ()
144 We can not read the property, since music_iter_->report_to() might
145 not be the context that sets the melisma properties, but rather a
148 return music_iter_->try_music (melisma_playing_req);
152 Lyric_combine_music_iterator::process (Moment m)
154 Moment my_next = music_iter_->pending_moment ();
158 music_iter_->process (m);
160 if (get_busy_status () && !melisma_busy () && lyric_iter_->ok ())
162 Moment m= lyric_iter_->pending_moment ();
163 lyric_iter_->process (m);
168 Lyric_combine_music_iterator::do_quit ()
176 Lyric_combine_music_iterator::Lyric_combine_music_iterator (Lyric_combine_music_iterator const & src)
177 : Music_iterator (src)
183 lyric_iter_ = src.lyric_iter_->clone ();
185 music_iter_ = src.music_iter_->clone ();
188 scm_gc_unprotect_object (lyric_iter_->self_scm());
190 scm_gc_unprotect_object (music_iter_->self_scm());
194 Lyric_combine_music_iterator::try_music_in_children (Music *m) const
196 Music_iterator * i = music_iter_->try_music (m);
200 return lyric_iter_->try_music (m);
204 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);