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 static const size_t NUM_PARTS = 2;
57 Music_iterator *iterators_[NUM_PARTS];
62 Stream_event *mmrest_event_;
75 // For states in which it matters, this is the relevant part,
76 // e.g. 1 for Solo I, 2 for Solo II.
80 TODO: this is getting off hand...
82 Context_handle handles_[NUM_OUTLETS];
84 void substitute_both (Outlet_type to1,
86 bool is_active_outlet (const Context *c) const;
87 void kill_mmrest (Context *c);
88 void chords_together ();
92 void unisono (bool silent, int newpart);
95 const size_t Part_combine_iterator::NUM_PARTS;
98 Part_combine_iterator::do_quit ()
100 for (size_t i = 0; i < NUM_PARTS; i++)
102 iterators_[i]->quit ();
105 Part_combine_iterator::Part_combine_iterator ()
109 for (size_t i = 0; i < NUM_PARTS; i++)
111 split_list_ = SCM_EOL;
117 Part_combine_iterator::derived_mark () const
119 for (size_t i = 0; i < NUM_PARTS; i++)
121 scm_gc_mark (iterators_[i]->self_scm ());
124 scm_gc_mark (mmrest_event_->self_scm ());
128 Part_combine_iterator::derived_substitute (Context *f,
131 // (Explain why just iterators_[0].)
133 iterators_[0]->substitute_outlet (f, t);
137 Part_combine_iterator::pending_moment () const
142 for (size_t i = 0; i < NUM_PARTS; i++)
143 if (iterators_[i]->ok ())
144 p = min (p, iterators_[i]->pending_moment ());
150 Part_combine_iterator::ok () const
152 for (size_t i = 0; i < NUM_PARTS; i++)
153 if (iterators_[i]->ok ())
160 Part_combine_iterator::substitute_both (Outlet_type to1,
163 // TODO: There is no good reason to tie the parts together here.
164 // Factor out per-part stuff into a new class of iterator which
165 // reads a part-specific list similar to the existing combined
167 iterators_[0]->substitute_outlet (iterators_[0]->get_outlet (),
168 handles_[to1].get_context ());
169 iterators_[1]->substitute_outlet (iterators_[1]->get_outlet (),
170 handles_[to2].get_context ());
173 bool Part_combine_iterator::is_active_outlet (const Context *c) const
175 for (size_t i = 0; i < NUM_PARTS; i++)
176 if (iterators_[i] && (iterators_[i]->get_outlet () == c))
183 Part_combine_iterator::kill_mmrest (Context *c)
188 mmrest_event_ = new Stream_event
189 (scm_call_1 (ly_lily_module_constant ("ly:make-event-class"),
190 ly_symbol2scm ("multi-measure-rest-event")));
191 mmrest_event_->set_property ("duration", SCM_EOL);
192 mmrest_event_->unprotect ();
195 c->event_source ()->broadcast (mmrest_event_);
199 Part_combine_iterator::unisono (bool silent, int newpart)
201 Status newstate = (silent) ? UNISILENCE : UNISONO;
203 if ((newstate == state_) and (newpart == chosen_part_))
207 Outlet_type c1 = (newpart == 2) ? CONTEXT_NULL : CONTEXT_SHARED;
208 Outlet_type c2 = (newpart == 2) ? CONTEXT_SHARED : CONTEXT_NULL;
209 substitute_both (c1, c2);
212 chosen_part_ = newpart;
217 Part_combine_iterator::solo1 ()
219 if ((state_ == SOLO) && (chosen_part_ == 1))
225 substitute_both (CONTEXT_SOLO, CONTEXT_NULL);
230 Part_combine_iterator::solo2 ()
232 if ((state_ == SOLO) and (chosen_part_ == 2))
238 substitute_both (CONTEXT_NULL, CONTEXT_SOLO);
243 Part_combine_iterator::chords_together ()
245 if (state_ == TOGETHER)
251 substitute_both (CONTEXT_SHARED, CONTEXT_SHARED);
256 Part_combine_iterator::apart ()
263 substitute_both (CONTEXT_ONE, CONTEXT_TWO);
268 Part_combine_iterator::construct_children ()
270 start_moment_ = get_outlet ()->now_mom ();
271 split_list_ = get_music ()->get_property ("split-list");
273 Context *c = get_outlet ();
275 for (int i = 0; i < NUM_OUTLETS; i++)
277 SCM type = (i == CONTEXT_NULL) ? ly_symbol2scm ("Devnull") : ly_symbol2scm ("Voice");
278 /* find context below c: otherwise we may create new staff for each voice */
279 c = c->find_create_context (type, outlet_names_[i], SCM_EOL);
280 handles_[i].set_context (c);
283 SCM lst = get_music ()->get_property ("elements");
284 iterators_[0] = unsmob<Music_iterator> (get_iterator (unsmob<Music> (scm_car (lst))));
285 iterators_[1] = unsmob<Music_iterator> (get_iterator (unsmob<Music> (scm_cadr (lst))));
289 Part_combine_iterator::process (Moment m)
291 Moment now = get_outlet ()->now_mom ();
294 /* This is needed if construct_children was called before iteration
296 if (start_moment_.main_part_.is_infinity () && start_moment_ < 0)
299 Context *prev_active_outlets[NUM_PARTS];
300 for (size_t i = 0; i < NUM_PARTS; i++)
301 prev_active_outlets[i] = iterators_[i]->get_outlet ();
303 for (; scm_is_pair (split_list_); split_list_ = scm_cdr (split_list_))
305 splitm = unsmob<Moment> (scm_caar (split_list_));
306 if (splitm && *splitm + start_moment_ > now)
309 SCM tag = scm_cdar (split_list_);
311 if (scm_is_eq (tag, ly_symbol2scm ("chords")))
313 else if (scm_is_eq (tag, ly_symbol2scm ("apart"))
314 || scm_is_eq (tag, ly_symbol2scm ("apart-silence"))
315 || scm_is_eq (tag, ly_symbol2scm ("apart-spanner")))
317 else if (scm_is_eq (tag, ly_symbol2scm ("unisono")))
319 // Continue to use the most recently used part because we might have
320 // killed mmrests in the other part.
321 unisono (false, (chosen_part_ == 2) ? 2 : 1);
323 else if (scm_is_eq (tag, ly_symbol2scm ("unisilence")))
326 unisono (true, (chosen_part_ == 2) ? 2 : 1);
328 else if (scm_is_eq (tag, ly_symbol2scm ("silence1")))
330 else if (scm_is_eq (tag, ly_symbol2scm ("silence2")))
332 else if (scm_is_eq (tag, ly_symbol2scm ("solo1")))
334 else if (scm_is_eq (tag, ly_symbol2scm ("solo2")))
336 else if (scm_is_symbol (tag))
338 string s = "Unknown split directive: "
339 + (scm_is_symbol (tag) ? ly_symbol2string (tag) : string ("not a symbol"));
340 programming_error (s);
344 bool any_outlet_changed = false;
345 for (size_t i = 0; i < NUM_PARTS; i++)
347 if (iterators_[i]->ok ())
348 iterators_[i]->process (m);
350 if (prev_active_outlets[i] != iterators_[i]->get_outlet ())
351 any_outlet_changed = true;
354 if (any_outlet_changed)
356 // Kill multi-measure rests in outlets that were previously active and
357 // are no longer active.
358 for (size_t i = 0; i < NUM_PARTS; i++)
360 Context *c = prev_active_outlets[i];
361 if (c && !is_active_outlet (c))
367 IMPLEMENT_CTOR_CALLBACK (Part_combine_iterator);