2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2004--2015 Han-Wen Nienhuys
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
21 #include "dispatcher.hh"
22 #include "lily-guile.hh"
24 #include "music-iterator.hh"
25 #include "music-sequence.hh"
30 CONTEXT_ONE, CONTEXT_TWO,
31 CONTEXT_SHARED, CONTEXT_SOLO,
32 CONTEXT_NULL, NUM_OUTLETS
35 static const char *outlet_names_[NUM_OUTLETS]
36 = {"one", "two", "shared", "solo", "null"};
38 class Part_combine_iterator : public Music_iterator
41 Part_combine_iterator ();
43 DECLARE_SCHEME_CALLBACK (constructor, ());
45 virtual void derived_substitute (Context *f, Context *t);
46 virtual void derived_mark () const;
48 virtual void construct_children ();
49 virtual Moment pending_moment () const;
50 virtual void do_quit ();
51 virtual void process (Moment);
53 virtual bool ok () const;
56 Music_iterator *first_iter_;
57 Music_iterator *second_iter_;
62 Stream_event *mmrest_event_;
74 // For states in which it matters, this is the relevant part,
75 // e.g. 1 for Solo I, 2 for Solo II.
79 TODO: this is getting off hand...
81 Context_handle handles_[NUM_OUTLETS];
83 void substitute_both (Outlet_type to1,
85 void kill_mmrest_in_inactive_outlets ();
86 /* parameter is really Outlet_type */
87 void kill_mmrest (int in);
88 void chords_together ();
92 void unisono (bool silent, int newpart);
96 Part_combine_iterator::do_quit ()
101 second_iter_->quit ();
104 Part_combine_iterator::Part_combine_iterator ()
110 split_list_ = SCM_EOL;
116 Part_combine_iterator::derived_mark () const
119 scm_gc_mark (first_iter_->self_scm ());
121 scm_gc_mark (second_iter_->self_scm ());
123 scm_gc_mark (mmrest_event_->self_scm ());
127 Part_combine_iterator::derived_substitute (Context *f,
131 first_iter_->substitute_outlet (f, t);
135 Part_combine_iterator::pending_moment () const
139 if (first_iter_->ok ())
140 p = min (p, first_iter_->pending_moment ());
142 if (second_iter_->ok ())
143 p = min (p, second_iter_->pending_moment ());
148 Part_combine_iterator::ok () const
150 return first_iter_->ok () || second_iter_->ok ();
154 Part_combine_iterator::substitute_both (Outlet_type to1,
157 first_iter_->substitute_outlet (first_iter_->get_outlet (),
158 handles_[to1].get_context ());
159 second_iter_->substitute_outlet (second_iter_->get_outlet (),
160 handles_[to2].get_context ());
163 void Part_combine_iterator::kill_mmrest_in_inactive_outlets ()
165 for (int j = 0; j < NUM_OUTLETS; j++)
167 Context *c = handles_[j].get_context ();
169 if (first_iter_->get_outlet () == c)
172 if (second_iter_->get_outlet () == c)
180 Part_combine_iterator::kill_mmrest (int in)
185 mmrest_event_ = new Stream_event
186 (scm_call_1 (ly_lily_module_constant ("ly:make-event-class"),
187 ly_symbol2scm ("multi-measure-rest-event")));
188 mmrest_event_->set_property ("duration", SCM_EOL);
189 mmrest_event_->unprotect ();
192 handles_[in].get_context ()->event_source ()->broadcast (mmrest_event_);
196 Part_combine_iterator::unisono (bool silent, int newpart)
198 Status newstate = (silent) ? UNISILENCE : UNISONO;
200 if ((newstate == state_) and (newpart == chosen_part_))
204 Outlet_type c1 = (newpart == 2) ? CONTEXT_NULL : CONTEXT_SHARED;
205 Outlet_type c2 = (newpart == 2) ? CONTEXT_SHARED : CONTEXT_NULL;
206 substitute_both (c1, c2);
209 chosen_part_ = newpart;
214 Part_combine_iterator::solo1 ()
216 if ((state_ == SOLO) && (chosen_part_ == 1))
222 substitute_both (CONTEXT_SOLO, CONTEXT_NULL);
227 Part_combine_iterator::solo2 ()
229 if ((state_ == SOLO) and (chosen_part_ == 2))
235 substitute_both (CONTEXT_NULL, CONTEXT_SOLO);
240 Part_combine_iterator::chords_together ()
242 if (state_ == TOGETHER)
248 substitute_both (CONTEXT_SHARED, CONTEXT_SHARED);
253 Part_combine_iterator::apart ()
260 substitute_both (CONTEXT_ONE, CONTEXT_TWO);
265 Part_combine_iterator::construct_children ()
267 start_moment_ = get_outlet ()->now_mom ();
268 split_list_ = get_music ()->get_property ("split-list");
270 Context *c = get_outlet ();
272 for (int i = 0; i < NUM_OUTLETS; i++)
274 SCM type = (i == CONTEXT_NULL) ? ly_symbol2scm ("Devnull") : ly_symbol2scm ("Voice");
275 /* find context below c: otherwise we may create new staff for each voice */
276 c = c->find_create_context (type, outlet_names_[i], SCM_EOL);
277 handles_[i].set_context (c);
280 SCM lst = get_music ()->get_property ("elements");
281 Context *one = handles_[CONTEXT_ONE].get_context ();
283 first_iter_ = unsmob<Music_iterator> (get_iterator (unsmob<Music> (scm_car (lst))));
284 Context *two = handles_[CONTEXT_TWO].get_context ();
286 second_iter_ = unsmob<Music_iterator> (get_iterator (unsmob<Music> (scm_cadr (lst))));
287 Context *shared = handles_[CONTEXT_SHARED].get_context ();
288 set_context (shared);
292 Part_combine_iterator::process (Moment m)
294 Moment now = get_outlet ()->now_mom ();
297 /* This is needed if construct_children was called before iteration
299 if (start_moment_.main_part_.is_infinity () && start_moment_ < 0)
302 for (; scm_is_pair (split_list_); split_list_ = scm_cdr (split_list_))
304 splitm = unsmob<Moment> (scm_caar (split_list_));
305 if (splitm && *splitm + start_moment_ > now)
308 SCM tag = scm_cdar (split_list_);
310 Context *outletsBefore[] = { first_iter_->get_outlet (),
311 second_iter_->get_outlet () };
313 if (scm_is_eq (tag, ly_symbol2scm ("chords")))
315 else if (scm_is_eq (tag, ly_symbol2scm ("apart"))
316 || scm_is_eq (tag, ly_symbol2scm ("apart-silence"))
317 || scm_is_eq (tag, ly_symbol2scm ("apart-spanner")))
319 else if (scm_is_eq (tag, ly_symbol2scm ("unisono")))
321 // Continue to use the most recently used part because we might have
322 // killed mmrests in the other part.
323 unisono (false, (chosen_part_ == 2) ? 2 : 1);
325 else if (scm_is_eq (tag, ly_symbol2scm ("unisilence")))
328 unisono (true, (chosen_part_ == 2) ? 2 : 1);
330 else if (scm_is_eq (tag, ly_symbol2scm ("silence1")))
332 else if (scm_is_eq (tag, ly_symbol2scm ("silence2")))
334 else if (scm_is_eq (tag, ly_symbol2scm ("solo1")))
336 else if (scm_is_eq (tag, ly_symbol2scm ("solo2")))
338 else if (scm_is_symbol (tag))
340 string s = "Unknown split directive: "
341 + (scm_is_symbol (tag) ? ly_symbol2string (tag) : string ("not a symbol"));
342 programming_error (s);
345 if ((first_iter_->get_outlet () != outletsBefore[0])
346 || (second_iter_->get_outlet () != outletsBefore[1]))
347 kill_mmrest_in_inactive_outlets ();
350 if (first_iter_->ok ())
351 first_iter_->process (m);
353 if (second_iter_->ok ())
354 second_iter_->process (m);
357 IMPLEMENT_CTOR_CALLBACK (Part_combine_iterator);