2 accidental-engraver.cc -- implement accidental_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 Modified 2001--2002 by Rune Zedeler <rz@daimi.au.dk>
10 #include "accidental-placement.hh"
11 #include "arpeggio.hh"
13 #include "engraver.hh"
14 #include "protected-scm.hh"
15 #include "rhythmic-head.hh"
16 #include "side-position-interface.hh"
22 #include "translator.icc"
24 class Accidental_entry
31 Engraver *origin_engraver_;
38 Accidental_entry::Accidental_entry ()
48 class Accidental_engraver : public Engraver
50 int get_bar_number ();
51 void update_local_key_signature ();
52 void create_accidental (Accidental_entry *entry, bool, bool);
53 Grob *make_standard_accidental (Music *note, Grob *note_head, Engraver *trans);
54 Grob *make_suggested_accidental (Music *note, Grob *note_head, Engraver *trans);
57 TRANSLATOR_DECLARATIONS (Accidental_engraver);
58 void process_music ();
60 void acknowledge_tie (Grob_info);
61 void acknowledge_arpeggio (Grob_info);
62 void acknowledge_rhythmic_head (Grob_info);
63 void acknowledge_finger (Grob_info);
65 void stop_translation_timestep ();
66 virtual void initialize ();
67 void process_acknowledged ();
68 virtual void finalize ();
69 virtual void derived_mark () const;
72 SCM last_keysig_; // ugh.
75 Urgh. Since the accidentals depend on lots of variables, we have
76 to store all information before we can really create the
79 Link_array<Grob> left_objects_;
80 Link_array<Grob> right_objects_;
82 Grob *accidental_placement_;
84 Array<Accidental_entry> accidentals_;
85 Link_array<Spanner> ties_;
92 ugh, it is not clear what properties are mutable and which
93 aren't. eg. localKeySignature is changed at runtime, which means
94 that references in grobs should always store ly_deep_copy ()s of
99 set_property_on_children (Context *trans, char const *sym, SCM val)
101 trans->set_property (sym, ly_deep_copy (val));
102 for (SCM p = trans->children_contexts (); scm_is_pair (p); p = scm_cdr (p))
104 Context *trg = unsmob_context (scm_car (p));
105 set_property_on_children (trg, sym, ly_deep_copy (val));
109 Accidental_engraver::Accidental_engraver ()
111 accidental_placement_ = 0;
112 last_keysig_ = SCM_EOL;
116 Accidental_engraver::derived_mark () const
118 scm_gc_mark (last_keysig_);
122 Accidental_engraver::update_local_key_signature ()
124 last_keysig_ = get_property ("keySignature");
125 set_property_on_children (context (), "localKeySignature", last_keysig_);
127 Context *trans = context ()->get_parent_context ();
129 /* Huh. Don't understand what this is good for. --hwn. */
132 while (trans && trans->where_defined (ly_symbol2scm ("localKeySignature"), &val))
134 trans->set_property ("localKeySignature", ly_deep_copy (last_keysig_));
135 trans = trans->get_parent_context ();
140 Accidental_engraver::initialize ()
142 update_local_key_signature ();
145 /** Calculate the number of accidentals on basis of the current local key
146 sig (passed as argument)
148 * First check step+octave (taking into account barnumbers if necessary).
150 * Then check the global signature (only step).
152 Return number of accidentals (0, 1 or 2). */
155 recent_enough (int bar_number, SCM alteration_def, SCM laziness)
157 if (scm_is_number (alteration_def)
158 || laziness == SCM_BOOL_T)
161 return (bar_number <= scm_to_int (scm_cdr (alteration_def)) + scm_to_int (laziness));
165 extract_alteration (SCM alteration_def)
167 if (scm_is_number (alteration_def))
168 return scm_to_int (alteration_def);
169 else if (scm_is_pair (alteration_def))
170 return scm_to_int (scm_car (alteration_def));
171 else if (alteration_def == SCM_BOOL_F)
179 is_tied (SCM alteration_def)
181 return (alteration_def == SCM_BOOL_T)
182 || (scm_is_pair (alteration_def) && scm_car (alteration_def) == SCM_BOOL_T);
186 number_accidentals_from_sig (bool *different, SCM sig, Pitch *pitch,
187 int bar_number, SCM laziness, bool ignore_octave)
189 int n = pitch->get_notename ();
190 int o = pitch->get_octave ();
192 SCM previous_alteration = SCM_BOOL_F;
194 SCM from_same_octave = ly_assoc_get (scm_cons (scm_from_int (o),
195 scm_from_int (n)), sig, SCM_BOOL_F);
196 SCM from_key_signature = ly_assoc_get (scm_from_int (n), sig, SCM_BOOL_F);
197 SCM from_other_octaves = SCM_BOOL_F;
198 for (SCM s = sig; scm_is_pair (s); s = scm_cdr (s))
200 SCM entry = scm_car (s);
201 if (scm_is_pair (scm_car (entry))
202 && scm_cdar (entry) == scm_from_int (n))
203 from_other_octaves = scm_cdr (entry);
206 if (from_same_octave != SCM_BOOL_F
207 && recent_enough (bar_number, from_same_octave, laziness))
209 previous_alteration = from_same_octave;
211 else if (ignore_octave
212 && from_other_octaves != SCM_BOOL_F
213 && recent_enough (bar_number, from_other_octaves, laziness))
215 previous_alteration = from_other_octaves;
217 else if (from_key_signature != SCM_BOOL_F)
219 previous_alteration = from_key_signature;
223 if (is_tied (previous_alteration))
230 int prev = extract_alteration (previous_alteration);
231 int alter = pitch->get_alteration ();
235 else if ((abs (alter) < abs (prev) || prev * alter < 0) && alter != 0)
237 *different = (alter != prev);
243 number_accidentals (bool *different,
244 Pitch *pitch, Context *origin,
245 SCM accidentals, int bar_number)
250 if (scm_is_pair (accidentals) && !scm_is_symbol (scm_car (accidentals)))
251 warning (_f ("accidental typesetting list must begin with context-name: %s",
252 ly_scm2string (scm_car (accidentals)).to_str0 ()));
254 for (; scm_is_pair (accidentals) && origin;
255 accidentals = scm_cdr (accidentals))
257 // If pair then it is a new accidentals typesetting rule to be checked
258 SCM rule = scm_car (accidentals);
259 if (scm_is_pair (rule))
261 SCM type = scm_car (rule);
262 SCM laziness = scm_cdr (rule);
263 SCM localsig = origin->get_property ("localKeySignature");
266 = scm_is_eq (ly_symbol2scm ("same-octave"), type);
268 = scm_is_eq (ly_symbol2scm ("any-octave"), type);
270 if (same_octave_b || any_octave_b)
273 int n = number_accidentals_from_sig
274 (&d, localsig, pitch, bar_number, laziness, any_octave_b);
275 *different = *different || d;
276 number = max (number, n);
279 warning (_f ("ignoring unknown accidental: %s",
280 ly_symbol2string (type).to_str0 ()));
283 /* if symbol then it is a context name. Scan parent contexts to
285 else if (scm_is_symbol (rule))
287 Context *dad = origin;
288 while (dad && !dad->is_alias (rule))
289 dad = dad->get_parent_context ();
295 warning (_f ("pair or context-name expected for accidental rule, found %s",
296 ly_scm2string (rule).to_str0 ()));
303 Accidental_engraver::get_bar_number ()
305 SCM barnum = get_property ("currentBarNumber");
306 SCM smp = get_property ("measurePosition");
308 int bn = robust_scm2int (barnum, 0);
310 Moment mp = robust_scm2moment (smp, Moment (0));
311 if (mp.main_part_ < Rational (0))
318 Accidental_engraver::process_acknowledged ()
320 if (accidentals_.size () && !accidentals_.top ().done_)
322 SCM accidentals = get_property ("autoAccidentals");
323 SCM cautionaries = get_property ("autoCautionaries");
324 int barnum = get_bar_number ();
326 for (int i = 0; i < accidentals_.size (); i++)
328 if (accidentals_[i].done_)
330 accidentals_[i].done_ = true;
332 Music *note = accidentals_[i].melodic_;
333 Context *origin = accidentals_[i].origin_;
335 Pitch *pitch = unsmob_pitch (note->get_property ("pitch"));
339 bool different = false;
340 bool different_caut = false;
342 int num = number_accidentals (&different,
344 accidentals, barnum);
345 int num_caut = number_accidentals (&different_caut,
347 cautionaries, barnum);
349 bool cautionary = to_boolean (note->get_property ("cautionary"));
354 different = different_caut;
358 if (num == 0 && to_boolean (note->get_property ("force-accidental")))
361 /* Cannot look for ties: it's not guaranteed that they reach
362 us before the notes. */
364 create_accidental (&accidentals_[i], num > 1, cautionary);
370 Accidental_engraver::create_accidental (Accidental_entry *entry,
371 bool restore_natural,
374 Music *note = entry->melodic_;
375 Grob *support = entry->head_;
376 Pitch *pitch = unsmob_pitch (note->get_property ("pitch"));
378 bool as_suggestion = to_boolean (entry->origin_->get_property ("suggestAccidentals"));
381 a = make_suggested_accidental (note, support, entry->origin_engraver_);
383 a = make_standard_accidental (note, support, entry->origin_engraver_);
385 SCM accs = scm_cons (scm_from_int (pitch->get_alteration ()),
389 if (to_boolean (get_property ("extraNatural")))
390 accs = scm_cons (scm_from_int (0), accs);
393 /* TODO: add cautionary option in accidental. */
395 a->set_property ("cautionary", SCM_BOOL_T);
397 a->set_property ("accidentals", accs);
398 entry->accidental_ = a;
402 Accidental_engraver::make_standard_accidental (Music *note,
408 We construct the accidentals at the originating Voice
409 level, so that we get the property settings for
410 Accidental from the respective Voice.
413 = make_grob_from_properties (trans,
414 ly_symbol2scm ("Accidental"),
419 We add the accidentals to the support of the arpeggio,
420 so it is put left of the accidentals.
422 for (int i = 0; i < left_objects_.size (); i++)
423 Side_position_interface::add_support (left_objects_[i], a);
424 for (int i = 0; i < right_objects_.size (); i++)
425 Side_position_interface::add_support (a, right_objects_[i]);
427 a->set_parent (support, Y_AXIS);
429 if (!accidental_placement_)
430 accidental_placement_ = make_item ("AccidentalPlacement",
432 Accidental_placement::add_accidental (accidental_placement_, a);
434 support->set_object ("accidental-grob", a->self_scm ());
440 Accidental_engraver::make_suggested_accidental (Music *note,
441 Grob *note_head, Engraver *trans)
445 = make_grob_from_properties (trans,
446 ly_symbol2scm ("AccidentalSuggestion"),
448 "AccidentalSuggestion");
450 Side_position_interface::add_support (a, note_head);
451 if (Grob *stem = unsmob_grob (a->get_object ("stem")))
453 Side_position_interface::add_support (a, stem);
456 a->set_parent (note_head, X_AXIS);
461 Accidental_engraver::finalize ()
463 last_keysig_ = SCM_EOL;
467 Accidental_engraver::stop_translation_timestep ()
469 for (int j = ties_.size (); j--;)
471 Grob *r = Tie::head (ties_[j], RIGHT);
472 for (int i = accidentals_.size (); i--;)
473 if (accidentals_[i].head_ == r)
475 if (Grob *g = accidentals_[i].accidental_)
477 g->set_object ("tie", ties_[j]->self_scm ());
478 accidentals_[i].tied_ = true;
485 for (int i = accidentals_.size (); i--;)
487 int barnum = get_bar_number ();
489 Music *note = accidentals_[i].melodic_;
490 Context *origin = accidentals_[i].origin_;
492 Pitch *pitch = unsmob_pitch (note->get_property ("pitch"));
496 int n = pitch->get_notename ();
497 int o = pitch->get_octave ();
498 int a = pitch->get_alteration ();
499 SCM key = scm_cons (scm_from_int (o), scm_from_int (n));
501 SCM localsig = SCM_EOL;
503 && origin->where_defined (ly_symbol2scm ("localKeySignature"), &localsig))
506 if (accidentals_[i].tied_)
509 Remember an alteration that is different both from
510 that of the tied note and of the key signature.
512 localsig = ly_assoc_front_x
513 (localsig, key, scm_cons (SCM_BOOL_T, scm_from_int (barnum)));
520 not really really correct if there are more than one
521 noteheads with the same notename.
523 localsig = ly_assoc_front_x (localsig, key,
524 scm_cons (scm_from_int (a),
525 scm_from_int (barnum)));
530 origin->set_property ("localKeySignature", localsig);
532 origin = origin->get_parent_context ();
536 accidental_placement_ = 0;
537 accidentals_.clear ();
538 left_objects_.clear ();
539 right_objects_.clear ();
543 Accidental_engraver::acknowledge_rhythmic_head (Grob_info info)
545 Music *note = info.music_cause ();
547 && note->is_mus_type ("note-event"))
550 String harmonics usually don't have accidentals.
552 if (to_boolean (get_property ("harmonicAccidentals"))
553 || !ly_is_equal (info.grob ()->get_property ("style"),
554 ly_symbol2scm ("harmonic")))
556 Accidental_entry entry;
557 entry.head_ = info.grob ();
558 entry.origin_engraver_ = dynamic_cast<Engraver *> (info.origin_translator ());
559 entry.origin_ = entry.origin_engraver_->context ();
560 entry.melodic_ = note;
562 accidentals_.push (entry);
568 Accidental_engraver::acknowledge_tie (Grob_info info)
570 ties_.push (dynamic_cast<Spanner *> (info.grob ()));
574 Accidental_engraver::acknowledge_arpeggio (Grob_info info)
576 left_objects_.push (info.grob ());
580 Accidental_engraver::acknowledge_finger (Grob_info info)
582 left_objects_.push (info.grob ());
586 Accidental_engraver::process_music ()
588 SCM sig = get_property ("keySignature");
589 /* Detect key sig changes.
590 Update all parents and children. */
591 if (last_keysig_ != sig)
592 update_local_key_signature ();
595 ADD_ACKNOWLEDGER (Accidental_engraver, arpeggio);
596 ADD_ACKNOWLEDGER (Accidental_engraver, finger);
597 ADD_ACKNOWLEDGER (Accidental_engraver, rhythmic_head);
598 ADD_ACKNOWLEDGER (Accidental_engraver, tie);
600 ADD_TRANSLATOR (Accidental_engraver,
602 "Catch note heads, ties and notices key-change events. "
603 "This engraver usually lives at Staff level, but "
604 "reads the settings for Accidental at @code{Voice} level, "
605 "so you can @code{\\override} them at @code{Voice}. ",
606 "Accidental AccidentalSuggestion",
613 "harmonicAccidentals "
615 "localKeySignature");