2 new-lyric-combine-iterator.cc -- implement Lyric_combine_music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 2004--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #include "dispatcher.hh"
10 #include "global-context.hh"
13 #include "international.hh"
14 #include "listener.hh"
15 #include "music-iterator.hh"
21 class Lyric_combine_music_iterator : public Music_iterator
24 Lyric_combine_music_iterator ();
25 Lyric_combine_music_iterator (Lyric_combine_music_iterator const &src);
26 DECLARE_SCHEME_CALLBACK (constructor, ());
28 virtual void construct_children ();
29 virtual Moment pending_moment () const;
30 virtual void do_quit ();
31 virtual void process (Moment);
32 virtual bool run_always ()const;
33 virtual bool ok () const;
34 virtual void derived_mark () const;
35 virtual void derived_substitute (Context *, Context *);
36 void set_music_context (Context *to);
38 bool start_new_syllable ();
39 Context *find_voice ();
40 DECLARE_LISTENER (set_busy);
41 DECLARE_LISTENER (check_new_context);
43 bool pending_grace_lyric_;
45 Context *lyrics_context_;
46 Context *music_context_;
47 SCM lyricsto_voice_name_;
50 Music_iterator *lyric_iter_;
53 Lyric_combine_music_iterator::Lyric_combine_music_iterator ()
56 pending_grace_lyric_ = false;
63 IMPLEMENT_LISTENER (Lyric_combine_music_iterator, set_busy)
65 Lyric_combine_music_iterator::set_busy (SCM se)
67 Stream_event *e = unsmob_stream_event (se);
69 if (e->in_event_class ("note-event") || e->in_event_class ("cluster-note-event"))
74 Lyric_combine_music_iterator::set_music_context (Context *to)
78 music_context_->event_source()->remove_listener (GET_LISTENER (set_busy), ly_symbol2scm ("music-event"));
79 lyrics_context_->unset_property (ly_symbol2scm ("associatedVoiceContext"));
84 to->event_source()->add_listener (GET_LISTENER (set_busy), ly_symbol2scm ("music-event"));
86 lyrics_context_->set_property ("associatedVoiceContext", to->self_scm ());
91 Lyric_combine_music_iterator::start_new_syllable ()
101 if (!to_boolean (lyrics_context_->get_property ("ignoreMelismata")))
103 bool m = melisma_busy (music_context_);
112 Lyric_combine_music_iterator::pending_moment () const
122 Lyric_combine_music_iterator::run_always () const
128 Lyric_combine_music_iterator::ok () const
130 return lyric_iter_ && lyric_iter_->ok ();
134 Lyric_combine_music_iterator::derived_mark ()const
137 scm_gc_mark (lyric_iter_->self_scm ());
139 scm_gc_mark (lyrics_context_->self_scm ());
141 scm_gc_mark (music_context_->self_scm ());
145 Lyric_combine_music_iterator::derived_substitute (Context *f, Context *t)
148 lyric_iter_->substitute_outlet (f, t);
149 if (lyrics_context_ && lyrics_context_ == f)
151 if (music_context_ && music_context_ == f)
152 set_music_context (t);
156 Lyric_combine_music_iterator::construct_children ()
158 Music *m = unsmob_music (get_music ()->get_property ("element"));
159 lyric_iter_ = unsmob_iterator (get_iterator (m));
162 lyrics_context_ = find_context_below (lyric_iter_->get_outlet (),
163 ly_symbol2scm ("Lyrics"), "");
165 if (!lyrics_context_)
167 m->origin ()->warning ("argument of \\lyricsto should contain Lyrics context");
170 lyricsto_voice_name_ = get_music ()->get_property ("associated-context");
172 Context *voice = find_voice ();
174 set_music_context (voice);
178 Wait for a Create_context event. If this isn't done, lyrics can be
179 delayed when voices are created implicitly.
181 Global_context *g = get_outlet ()->get_global_context ();
182 g->events_below ()->add_listener (GET_LISTENER (check_new_context), ly_symbol2scm ("CreateContext"));
186 We do not create a Lyrics context, because the user might
187 create one with a different name, and then we will not find that
192 IMPLEMENT_LISTENER (Lyric_combine_music_iterator, check_new_context)
194 Lyric_combine_music_iterator::check_new_context (SCM sev)
196 // TODO: Check first if type=Voice and if id matches
199 Context *voice = find_voice ();
202 set_music_context (voice);
204 Global_context *g = voice->get_global_context ();
205 g->events_below ()->remove_listener (GET_LISTENER (check_new_context), ly_symbol2scm ("CreateContext"));
210 Look for a suitable voice to align lyrics to.
212 Returns 0 if nothing should change; i.e., if we already listen to the
213 right voice, or if we don't yet listen to a voice but no appropriate
214 voice could be found.
217 Lyric_combine_music_iterator::find_voice ()
219 SCM voice_name = lyricsto_voice_name_;
220 SCM running = lyrics_context_
221 ? lyrics_context_->get_property ("associatedVoice")
224 if (scm_is_string (running))
225 voice_name = running;
227 if (scm_is_string (voice_name)
228 && (!music_context_ || ly_scm2string (voice_name) != music_context_->id_string ()))
230 Context *t = get_outlet ();
231 while (t && t->get_parent_context ())
232 t = t->get_parent_context ();
234 string name = ly_scm2string (voice_name);
235 return find_context_below (t, ly_symbol2scm ("Voice"), name);
242 Lyric_combine_music_iterator::process (Moment)
244 /* see if associatedVoice has been changed */
245 Context *new_voice = find_voice ();
247 set_music_context (new_voice);
252 if (!music_context_->get_parent_context ())
259 lyrics_context_->unset_property (ly_symbol2scm ("associatedVoiceContext"));
261 set_music_context (0);
265 && (start_new_syllable () || pending_grace_lyric_)
266 && lyric_iter_->ok ())
268 if (music_context_->now_mom ().grace_part_)
270 pending_grace_lyric_ = true;
274 pending_grace_lyric_ = false;
276 Moment m = lyric_iter_->pending_moment ();
277 lyric_iter_->process (m);
284 Lyric_combine_music_iterator::do_quit ()
288 SCM voice_name = get_music ()->get_property ("associated-context");
291 if (scm_is_string (voice_name))
292 name = ly_scm2string (voice_name);
294 get_music ()->origin ()->warning (_f ("cannot find Voice `%s'",
295 name.c_str ()) + "\n");
299 lyric_iter_->quit ();
302 IMPLEMENT_CTOR_CALLBACK (Lyric_combine_music_iterator);