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"
28 static const char *const CONTEXT_ONE = "one";
29 static const char *const CONTEXT_TWO = "two";
30 static const char *const CONTEXT_SHARED = "shared";
31 static const char *const CONTEXT_SOLO = "solo";
32 static const char *const CONTEXT_NULL = "null";
34 class Part_combine_iterator : public Music_iterator
37 Part_combine_iterator ();
39 DECLARE_SCHEME_CALLBACK (constructor, ());
41 virtual void derived_substitute (Context *f, Context *t);
42 virtual void derived_mark () const;
44 virtual void construct_children ();
45 virtual Moment pending_moment () const;
46 virtual void do_quit ();
47 virtual void process (Moment);
49 virtual bool ok () const;
52 static const size_t NUM_PARTS = 2;
53 Music_iterator *iterators_[NUM_PARTS];
57 Stream_event *mmrest_event_;
70 // For states in which it matters, this is the relevant part,
71 // e.g. 1 for Solo I, 2 for Solo II.
74 void substitute_one (Music_iterator *iter, const char *voice_id);
75 void substitute_both (const char *part1_voice_id, const char *part2_voice_id);
76 bool is_active_outlet (const Context *c) const;
77 void kill_mmrest (Context *c);
78 void chords_together ();
82 void unisono (bool silent, int newpart);
85 const size_t Part_combine_iterator::NUM_PARTS;
88 Part_combine_iterator::do_quit ()
90 for (size_t i = 0; i < NUM_PARTS; i++)
92 iterators_[i]->quit ();
95 Part_combine_iterator::Part_combine_iterator ()
99 for (size_t i = 0; i < NUM_PARTS; i++)
101 split_list_ = SCM_EOL;
107 Part_combine_iterator::derived_mark () const
109 for (size_t i = 0; i < NUM_PARTS; i++)
111 scm_gc_mark (iterators_[i]->self_scm ());
114 scm_gc_mark (mmrest_event_->self_scm ());
118 Part_combine_iterator::derived_substitute (Context *f,
121 // (Explain why just iterators_[0].)
123 iterators_[0]->substitute_outlet (f, t);
127 Part_combine_iterator::pending_moment () const
132 for (size_t i = 0; i < NUM_PARTS; i++)
133 if (iterators_[i]->ok ())
134 p = min (p, iterators_[i]->pending_moment ());
140 Part_combine_iterator::ok () const
142 for (size_t i = 0; i < NUM_PARTS; i++)
143 if (iterators_[i]->ok ())
150 Part_combine_iterator::substitute_one (Music_iterator *iter,
151 const char *voice_id)
153 Context *c = iter->get_outlet ();
156 programming_error ("no context");
159 c = c->get_parent_context ();
162 programming_error ("no parent context");
165 c = find_context_below (c, ly_symbol2scm("Voice"), voice_id);
168 string s = "can not find Voice context: ";
170 programming_error (s);
173 iter->substitute_outlet (iter->get_outlet (), c);
177 Part_combine_iterator::substitute_both (const char *part1_voice_id,
178 const char *part2_voice_id)
180 // TODO: There is no good reason to tie the parts together here.
181 // Factor out per-part stuff into a new class of iterator which
182 // reads a part-specific list similar to the existing combined
184 substitute_one(iterators_[0], part1_voice_id);
185 substitute_one(iterators_[1], part2_voice_id);
188 bool Part_combine_iterator::is_active_outlet (const Context *c) const
190 for (size_t i = 0; i < NUM_PARTS; i++)
191 if (iterators_[i] && (iterators_[i]->get_outlet () == c))
198 Part_combine_iterator::kill_mmrest (Context *c)
203 mmrest_event_ = new Stream_event
204 (scm_call_1 (ly_lily_module_constant ("ly:make-event-class"),
205 ly_symbol2scm ("multi-measure-rest-event")));
206 mmrest_event_->set_property ("duration", SCM_EOL);
207 mmrest_event_->unprotect ();
210 c->event_source ()->broadcast (mmrest_event_);
214 Part_combine_iterator::unisono (bool silent, int newpart)
216 Status newstate = (silent) ? UNISILENCE : UNISONO;
218 if ((newstate == state_) and (newpart == chosen_part_))
222 const char *c1 = (newpart == 2) ? CONTEXT_NULL : CONTEXT_SHARED;
223 const char *c2 = (newpart == 2) ? CONTEXT_SHARED : CONTEXT_NULL;
224 substitute_both (c1, c2);
227 chosen_part_ = newpart;
232 Part_combine_iterator::solo1 ()
234 if ((state_ == SOLO) && (chosen_part_ == 1))
240 substitute_both (CONTEXT_SOLO, CONTEXT_NULL);
245 Part_combine_iterator::solo2 ()
247 if ((state_ == SOLO) and (chosen_part_ == 2))
253 substitute_both (CONTEXT_NULL, CONTEXT_SOLO);
258 Part_combine_iterator::chords_together ()
260 if (state_ == TOGETHER)
266 substitute_both (CONTEXT_SHARED, CONTEXT_SHARED);
271 Part_combine_iterator::apart ()
278 substitute_both (CONTEXT_ONE, CONTEXT_TWO);
283 Part_combine_iterator::construct_children ()
285 split_list_ = get_music ()->get_property ("split-list");
287 SCM lst = get_music ()->get_property ("elements");
288 iterators_[0] = unsmob<Music_iterator> (get_iterator (unsmob<Music> (scm_car (lst))));
289 iterators_[1] = unsmob<Music_iterator> (get_iterator (unsmob<Music> (scm_cadr (lst))));
293 Part_combine_iterator::process (Moment m)
297 Context *prev_active_outlets[NUM_PARTS];
298 for (size_t i = 0; i < NUM_PARTS; i++)
299 prev_active_outlets[i] = iterators_[i]->get_outlet ();
301 for (; scm_is_pair (split_list_); split_list_ = scm_cdr (split_list_))
303 splitm = unsmob<Moment> (scm_caar (split_list_));
304 if (splitm && *splitm > m)
307 SCM tag = scm_cdar (split_list_);
309 if (scm_is_eq (tag, ly_symbol2scm ("chords")))
311 else if (scm_is_eq (tag, ly_symbol2scm ("apart"))
312 || scm_is_eq (tag, ly_symbol2scm ("apart-silence"))
313 || scm_is_eq (tag, ly_symbol2scm ("apart-spanner")))
315 else if (scm_is_eq (tag, ly_symbol2scm ("unisono")))
317 // Continue to use the most recently used part because we might have
318 // killed mmrests in the other part.
319 unisono (false, (chosen_part_ == 2) ? 2 : 1);
321 else if (scm_is_eq (tag, ly_symbol2scm ("unisilence")))
324 unisono (true, (chosen_part_ == 2) ? 2 : 1);
326 else if (scm_is_eq (tag, ly_symbol2scm ("silence1")))
328 else if (scm_is_eq (tag, ly_symbol2scm ("silence2")))
330 else if (scm_is_eq (tag, ly_symbol2scm ("solo1")))
332 else if (scm_is_eq (tag, ly_symbol2scm ("solo2")))
334 else if (scm_is_symbol (tag))
336 string s = "Unknown split directive: "
337 + (scm_is_symbol (tag) ? ly_symbol2string (tag) : string ("not a symbol"));
338 programming_error (s);
342 bool any_outlet_changed = false;
343 for (size_t i = 0; i < NUM_PARTS; i++)
345 if (iterators_[i]->ok ())
346 iterators_[i]->process (m);
348 if (prev_active_outlets[i] != iterators_[i]->get_outlet ())
349 any_outlet_changed = true;
352 if (any_outlet_changed)
354 // Kill multi-measure rests in outlets that were previously active and
355 // are no longer active.
356 for (size_t i = 0; i < NUM_PARTS; i++)
358 Context *c = prev_active_outlets[i];
359 if (c && !is_active_outlet (c))
365 IMPLEMENT_CTOR_CALLBACK (Part_combine_iterator);