2 new-part-combine-music-iterator.cc -- implement New_pc_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 2004 Han-Wen Nienhuys
9 #include "part-combine-music-iterator.hh"
10 #include "translator-group.hh"
12 #include "music-sequence.hh"
13 #include "lily-guile.hh"
15 #include "music-iterator.hh"
16 #include "interpretation-context-handle.hh"
18 class New_pc_iterator : public Music_iterator
21 VIRTUAL_COPY_CONS (Music_iterator);
24 DECLARE_SCHEME_CALLBACK(constructor, ());
26 virtual void derived_substitute (Translator_group*f, Translator_group*t) ;
27 virtual void derived_mark () const;
28 New_pc_iterator (New_pc_iterator const &);
30 virtual void construct_children ();
31 virtual Moment pending_moment () const;
32 virtual void do_quit();
33 virtual void process (Moment);
35 virtual SCM get_pending_events (Moment)const;
36 virtual Music_iterator *try_music_in_children (Music *) const;
38 virtual bool ok () const;
41 Music_iterator * first_iter_;
42 Music_iterator * second_iter_;
46 Interpretation_context_handle one_;
47 Interpretation_context_handle two_;
48 Interpretation_context_handle null_;
49 Interpretation_context_handle shared_;
51 void chords_together ();
59 New_pc_iterator::New_pc_iterator ()
64 split_list_ = SCM_EOL;
68 New_pc_iterator::derived_mark () const
71 scm_gc_mark (first_iter_->self_scm());
73 scm_gc_mark(second_iter_->self_scm());
77 New_pc_iterator::derived_substitute (Translator_group*f,
81 first_iter_->substitute_outlet (f,t);
83 second_iter_->substitute_outlet (f,t);
87 New_pc_iterator::do_quit ()
94 one_ .set_translator (0);
95 two_.set_translator (0);
96 shared_.set_translator (0);
99 New_pc_iterator::New_pc_iterator (New_pc_iterator const &src)
100 : Music_iterator (src)
106 first_iter_ = src.first_iter_->clone ();
107 if (src.second_iter_)
108 second_iter_ = src.second_iter_->clone ();
110 split_list_ = src.split_list_;
113 scm_gc_unprotect_object (first_iter_->self_scm());
115 scm_gc_unprotect_object (second_iter_->self_scm());
119 New_pc_iterator::pending_moment () const
123 if (first_iter_->ok ())
124 p = p <? first_iter_->pending_moment ();
126 if (second_iter_->ok ())
127 p = p <? second_iter_->pending_moment ();
132 New_pc_iterator::ok () const
134 return first_iter_->ok () || second_iter_->ok ();
138 New_pc_iterator::chords_together ()
140 first_iter_->substitute_outlet (one_.report_to (), shared_.report_to ());
141 first_iter_->substitute_outlet (null_.report_to (), shared_.report_to ());
142 second_iter_->substitute_outlet (two_.report_to (), shared_.report_to ());
143 second_iter_->substitute_outlet (null_.report_to (), shared_.report_to ());
148 New_pc_iterator::solo1 ()
150 first_iter_->substitute_outlet (null_.report_to (), shared_.report_to ());
151 first_iter_->substitute_outlet (one_.report_to (), shared_.report_to ());
153 second_iter_->substitute_outlet (two_.report_to (), null_.report_to ());
154 second_iter_->substitute_outlet (shared_.report_to (), null_.report_to ());
158 New_pc_iterator::unisono ()
161 like solo1, but should set a2 string.
163 first_iter_->substitute_outlet (null_.report_to (), shared_.report_to ());
164 first_iter_->substitute_outlet (one_.report_to (), shared_.report_to ());
166 second_iter_->substitute_outlet (two_.report_to (), null_.report_to ());
167 second_iter_->substitute_outlet (shared_.report_to (), null_.report_to ());
172 New_pc_iterator::solo2 ()
174 second_iter_->substitute_outlet (null_.report_to (), shared_.report_to ());
175 second_iter_->substitute_outlet (two_.report_to (), shared_.report_to ());
177 first_iter_->substitute_outlet (one_.report_to (), null_.report_to ());
178 first_iter_->substitute_outlet (shared_.report_to (), null_.report_to ());
183 New_pc_iterator::apart ()
185 first_iter_->substitute_outlet (null_.report_to (), one_.report_to ());
186 first_iter_->substitute_outlet (shared_.report_to (), one_.report_to ());
188 second_iter_->substitute_outlet (null_.report_to (), two_.report_to ());
189 second_iter_->substitute_outlet (shared_.report_to (), two_.report_to ());
194 New_pc_iterator::construct_children ()
196 split_list_ = get_music ()->get_mus_property ("split-list");
197 SCM lst = get_music ()->get_mus_property ("elements");
199 SCM props = scm_list_n (scm_list_n (ly_symbol2scm ("denies"), ly_symbol2scm ("Thread"), SCM_UNDEFINED),
200 scm_list_n (ly_symbol2scm ("consists"), ly_symbol2scm ("Rest_engraver"), SCM_UNDEFINED),
201 scm_list_n (ly_symbol2scm ("consists"), ly_symbol2scm ("Note_heads_engraver"), SCM_UNDEFINED),
205 = report_to ()->find_create_translator (ly_symbol2scm ("Voice"),
208 shared_ .set_translator (tr);
210 Translator_group *null
211 = report_to ()->find_create_translator (ly_symbol2scm ("Devnull"),
213 null_.set_translator (null);
215 Translator_group *one = tr->find_create_translator (ly_symbol2scm ("Voice"),
218 one_.set_translator (one);
219 one->execute_pushpop_property (ly_symbol2scm ("Stem"),
220 ly_symbol2scm ("direction"), gh_int2scm (1));
222 set_translator (one);
223 first_iter_ = unsmob_iterator (get_iterator (unsmob_music (gh_car (lst))));
226 Translator_group *two = tr->find_create_translator (ly_symbol2scm ("Voice"),
228 two_.set_translator (two);
229 two_.report_to ()->execute_pushpop_property (ly_symbol2scm ("Stem"),
230 ly_symbol2scm ("direction"), gh_int2scm (-1));
231 set_translator (two);
232 second_iter_ = unsmob_iterator (get_iterator (unsmob_music (gh_cadr (lst))));
239 New_pc_iterator::process (Moment m)
241 Moment now = report_to ()->now_mom ();
244 for (; gh_pair_p (split_list_); split_list_ = gh_cdr (split_list_))
246 splitm = unsmob_moment (gh_caar (split_list_));
250 SCM tag = gh_cdar (split_list_);
252 if (tag == ly_symbol2scm ("chords"))
254 else if (tag == ly_symbol2scm ("apart"))
256 else if (tag == ly_symbol2scm ("unisono"))
258 else if (tag == ly_symbol2scm ("solo1"))
260 else if (tag == ly_symbol2scm ("solo2"))
264 String s = "Unknown split directive: " + ly_symbol2string (tag);
265 programming_error (s);
269 if (first_iter_->ok ())
270 first_iter_->process (m);
272 if (second_iter_->ok ())
273 second_iter_->process (m);
277 New_pc_iterator::try_music_in_children (Music *m) const
279 Music_iterator * i = first_iter_->try_music (m);
283 return second_iter_->try_music (m);
288 New_pc_iterator::get_pending_events (Moment m)const
292 s = gh_append2 (s,first_iter_->get_pending_events (m));
294 s = gh_append2 (second_iter_->get_pending_events (m),s);
298 IMPLEMENT_CTOR_CALLBACK (New_pc_iterator);