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 /* used by try_process */
61 bool try_process (Music_iterator *i, Moment m);
63 Music_iterator *first_iter_;
64 Music_iterator *second_iter_;
69 Stream_event *mmrest_event_;
81 // For states in which it matters, this is the relevant part,
82 // e.g. 1 for Solo I, 2 for Solo II.
88 TODO: this is getting off hand...
90 Context_handle handles_[NUM_OUTLETS];
92 void substitute_both (Outlet_type to1,
95 /* parameter is really Outlet_type */
96 void kill_mmrest (int in);
97 void chords_together ();
100 void apart (bool silent);
101 void unisono (bool silent, int newpart);
105 Part_combine_iterator::do_quit ()
108 first_iter_->quit ();
110 second_iter_->quit ();
112 // Add listeners to all contexts except Devnull.
113 for (int i = 0; i < NUM_OUTLETS; i++)
115 Context *c = handles_[i].get_context ();
116 if (c->is_alias (ly_symbol2scm ("Voice")))
117 c->event_source ()->remove_listener (GET_LISTENER (Part_combine_iterator, set_busy), ly_symbol2scm ("music-event"));
118 handles_[i].set_context (0);
122 Part_combine_iterator::Part_combine_iterator ()
128 split_list_ = SCM_EOL;
134 notice_busy_ = false;
138 Part_combine_iterator::derived_mark () const
141 scm_gc_mark (first_iter_->self_scm ());
143 scm_gc_mark (second_iter_->self_scm ());
145 scm_gc_mark (mmrest_event_->self_scm ());
149 Part_combine_iterator::derived_substitute (Context *f,
153 first_iter_->substitute_outlet (f, t);
157 Part_combine_iterator::pending_moment () const
161 if (first_iter_->ok ())
162 p = min (p, first_iter_->pending_moment ());
164 if (second_iter_->ok ())
165 p = min (p, second_iter_->pending_moment ());
170 Part_combine_iterator::ok () const
172 return first_iter_->ok () || second_iter_->ok ();
176 Part_combine_iterator::substitute_both (Outlet_type to1,
179 first_iter_->substitute_outlet (first_iter_->get_outlet (),
180 handles_[to1].get_context ());
181 second_iter_->substitute_outlet (second_iter_->get_outlet (),
182 handles_[to2].get_context ());
184 for (int j = 0; j < NUM_OUTLETS; j++)
186 if (j != to1 && j != to2)
192 Part_combine_iterator::kill_mmrest (int in)
197 mmrest_event_ = new Stream_event
198 (scm_call_1 (ly_lily_module_constant ("ly:make-event-class"),
199 ly_symbol2scm ("multi-measure-rest-event")));
200 mmrest_event_->set_property ("duration", SCM_EOL);
201 mmrest_event_->unprotect ();
204 handles_[in].get_context ()->event_source ()->broadcast (mmrest_event_);
208 Part_combine_iterator::unisono (bool silent, int newpart)
210 Status newstate = (silent) ? UNISILENCE : UNISONO;
212 if ((newstate == state_) and (newpart == chosen_part_))
216 Outlet_type c1 = (newpart == 2) ? CONTEXT_NULL : CONTEXT_SHARED;
217 Outlet_type c2 = (newpart == 2) ? CONTEXT_SHARED : CONTEXT_NULL;
218 substitute_both (c1, c2);
219 kill_mmrest ((newpart == 2) ? CONTEXT_ONE : CONTEXT_TWO);
220 kill_mmrest (CONTEXT_SHARED);
223 chosen_part_ = newpart;
228 Part_combine_iterator::solo1 ()
230 if ((state_ == SOLO) && (chosen_part_ == 1))
236 substitute_both (CONTEXT_SOLO, CONTEXT_NULL);
238 kill_mmrest (CONTEXT_TWO);
239 kill_mmrest (CONTEXT_SHARED);
244 Part_combine_iterator::solo2 ()
246 if ((state_ == SOLO) and (chosen_part_ == 2))
252 substitute_both (CONTEXT_NULL, CONTEXT_SOLO);
257 Part_combine_iterator::chords_together ()
259 if (state_ == TOGETHER)
265 substitute_both (CONTEXT_SHARED, CONTEXT_SHARED);
270 Part_combine_iterator::apart (bool silent)
277 substitute_both (CONTEXT_ONE, CONTEXT_TWO);
282 Part_combine_iterator::construct_children ()
284 start_moment_ = get_outlet ()->now_mom ();
285 split_list_ = get_music ()->get_property ("split-list");
287 Context *c = get_outlet ();
289 for (int i = 0; i < NUM_OUTLETS; i++)
291 SCM type = (i == CONTEXT_NULL) ? ly_symbol2scm ("Devnull") : ly_symbol2scm ("Voice");
292 /* find context below c: otherwise we may create new staff for each voice */
293 c = c->find_create_context (type, outlet_names_[i], SCM_EOL);
294 handles_[i].set_context (c);
295 if (c->is_alias (ly_symbol2scm ("Voice")))
296 c->event_source ()->add_listener (GET_LISTENER (Part_combine_iterator, set_busy), ly_symbol2scm ("music-event"));
299 SCM lst = get_music ()->get_property ("elements");
300 Context *one = handles_[CONTEXT_ONE].get_context ();
302 first_iter_ = Music_iterator::unsmob (get_iterator (Music::unsmob (scm_car (lst))));
303 Context *two = handles_[CONTEXT_TWO].get_context ();
305 second_iter_ = Music_iterator::unsmob (get_iterator (Music::unsmob (scm_cadr (lst))));
306 Context *shared = handles_[CONTEXT_SHARED].get_context ();
307 set_context (shared);
311 Part_combine_iterator::set_busy (SCM se)
316 Stream_event *e = Stream_event::unsmob (se);
318 if (e->in_event_class ("note-event") || e->in_event_class ("cluster-note-event"))
323 Processes a moment in an iterator, and returns whether any new music
327 Part_combine_iterator::try_process (Music_iterator *i, Moment m)
334 notice_busy_ = false;
339 Part_combine_iterator::process (Moment m)
341 Moment now = get_outlet ()->now_mom ();
344 /* This is needed if construct_children was called before iteration
346 if (start_moment_.main_part_.is_infinity () && start_moment_ < 0)
349 for (; scm_is_pair (split_list_); split_list_ = scm_cdr (split_list_))
351 splitm = Moment::unsmob (scm_caar (split_list_));
352 if (splitm && *splitm + start_moment_ > now)
355 SCM tag = scm_cdar (split_list_);
357 if (scm_is_eq (tag, ly_symbol2scm ("chords")))
359 else if (scm_is_eq (tag, ly_symbol2scm ("apart"))
360 || scm_is_eq (tag, ly_symbol2scm ("apart-silence"))
361 || scm_is_eq (tag, ly_symbol2scm ("apart-spanner")))
362 apart (scm_is_eq (tag, ly_symbol2scm ("apart-silence")));
363 else if (scm_is_eq (tag, ly_symbol2scm ("unisono")))
365 // Continue to use the most recently used part because we might have
366 // killed mmrests in the other part.
367 unisono (false, (last_playing_ == 2) ? 2 : 1);
369 else if (scm_is_eq (tag, ly_symbol2scm ("unisilence")))
372 unisono (true, (last_playing_ == 2) ? 2 : 1);
374 else if (scm_is_eq (tag, ly_symbol2scm ("silence1")))
376 else if (scm_is_eq (tag, ly_symbol2scm ("silence2")))
378 else if (scm_is_eq (tag, ly_symbol2scm ("solo1")))
380 else if (scm_is_eq (tag, ly_symbol2scm ("solo2")))
382 else if (scm_is_symbol (tag))
384 string s = "Unknown split directive: "
385 + (scm_is_symbol (tag) ? ly_symbol2string (tag) : string ("not a symbol"));
386 programming_error (s);
390 if (first_iter_->ok ())
392 if (try_process (first_iter_, m))
396 if (second_iter_->ok ())
398 if (try_process (second_iter_, m))
403 IMPLEMENT_CTOR_CALLBACK (Part_combine_iterator);