2 accidental-engraver.cc -- implement accidental_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
7 Modified 2001--2002 by Rune Zedeler <rz@daimi.au.dk>
10 #include "accidental-placement.hh"
11 #include "arpeggio.hh"
15 #include "engraver.hh"
16 #include "international.hh"
18 #include "protected-scm.hh"
19 #include "rhythmic-head.hh"
20 #include "side-position-interface.hh"
21 #include "stream-event.hh"
25 #include "translator.icc"
27 class Accidental_entry
31 Stream_event *melodic_;
34 Engraver *origin_engraver_;
41 Accidental_entry::Accidental_entry ()
51 class Accidental_engraver : public Engraver
53 int get_bar_number ();
54 void update_local_key_signature ();
55 void create_accidental (Accidental_entry *entry, bool, bool);
56 Grob *make_standard_accidental (Stream_event *note, Grob *note_head, Engraver *trans);
57 Grob *make_suggested_accidental (Stream_event *note, Grob *note_head, Engraver *trans);
60 TRANSLATOR_DECLARATIONS (Accidental_engraver);
61 void process_music ();
63 void acknowledge_tie (Grob_info);
64 void acknowledge_arpeggio (Grob_info);
65 void acknowledge_rhythmic_head (Grob_info);
66 void acknowledge_finger (Grob_info);
68 void stop_translation_timestep ();
69 virtual void initialize ();
70 void process_acknowledged ();
71 virtual void finalize ();
72 virtual void derived_mark () const;
75 SCM last_keysig_; // ugh.
78 Urgh. Since the accidentals depend on lots of variables, we have
79 to store all information before we can really create the
82 vector<Grob*> left_objects_;
83 vector<Grob*> right_objects_;
85 Grob *accidental_placement_;
87 vector<Accidental_entry> accidentals_;
88 vector<Spanner*> ties_;
94 ugh, it is not clear what properties are mutable and which
95 aren't. eg. localKeySignature is changed at runtime, which means
96 that references in grobs should always store ly_deep_copy ()s of
101 Accidental_engraver::Accidental_engraver ()
103 accidental_placement_ = 0;
104 last_keysig_ = SCM_EOL;
108 Accidental_engraver::derived_mark () const
110 scm_gc_mark (last_keysig_);
114 Accidental_engraver::update_local_key_signature ()
116 last_keysig_ = get_property ("keySignature");
117 set_context_property_on_children (context (),
118 ly_symbol2scm ("localKeySignature"),
121 Context *trans = context ()->get_parent_context ();
123 /* Huh. Don't understand what this is good for. --hwn. */
127 trans->set_property ("localKeySignature", ly_deep_copy (last_keysig_));
128 trans = trans->get_parent_context ();
133 Accidental_engraver::initialize ()
135 update_local_key_signature ();
138 /** Calculate the number of accidentals on basis of the current local key
139 sig (passed as argument)
141 * First check step+octave (taking into account barnumbers if necessary).
143 * Then check the global signature (only step).
145 Return number of accidentals (0, 1 or 2). */
148 recent_enough (int bar_number, SCM alteration_def, SCM laziness)
150 if (scm_is_number (alteration_def)
151 || laziness == SCM_BOOL_T)
154 return (bar_number <= scm_to_int (scm_cdr (alteration_def)) + scm_to_int (laziness));
158 extract_alteration (SCM alteration_def)
160 if (scm_is_number (alteration_def))
161 return scm_to_int (alteration_def);
162 else if (scm_is_pair (alteration_def))
163 return scm_to_int (scm_car (alteration_def));
164 else if (alteration_def == SCM_BOOL_F)
172 is_tied (SCM alteration_def)
174 return (alteration_def == SCM_BOOL_T)
175 || (scm_is_pair (alteration_def) && scm_car (alteration_def) == SCM_BOOL_T);
179 number_accidentals_from_sig (bool *different, SCM sig, Pitch *pitch,
180 int bar_number, SCM laziness, bool ignore_octave)
182 int n = pitch->get_notename ();
183 int o = pitch->get_octave ();
185 SCM previous_alteration = SCM_BOOL_F;
187 SCM from_same_octave = ly_assoc_get (scm_cons (scm_from_int (o),
188 scm_from_int (n)), sig, SCM_BOOL_F);
189 SCM from_key_signature = ly_assoc_get (scm_from_int (n), sig, SCM_BOOL_F);
190 SCM from_other_octaves = SCM_BOOL_F;
191 for (SCM s = sig; scm_is_pair (s); s = scm_cdr (s))
193 SCM entry = scm_car (s);
194 if (scm_is_pair (scm_car (entry))
195 && scm_cdar (entry) == scm_from_int (n)) {
196 from_other_octaves = scm_cdr (entry);
202 && from_same_octave != SCM_BOOL_F
203 && recent_enough (bar_number, from_same_octave, laziness))
204 previous_alteration = from_same_octave;
205 else if (ignore_octave
206 && from_other_octaves != SCM_BOOL_F
207 && recent_enough (bar_number, from_other_octaves, laziness))
208 previous_alteration = from_other_octaves;
209 else if (from_key_signature != SCM_BOOL_F)
210 previous_alteration = from_key_signature;
213 if (is_tied (previous_alteration))
220 int prev = extract_alteration (previous_alteration);
221 int alter = pitch->get_alteration ();
225 else if ((abs (alter) < abs (prev)
226 || prev * alter < 0) && alter != 0)
228 *different = (alter != prev);
234 number_accidentals (bool *different,
235 Pitch *pitch, Context *origin,
236 SCM accidentals, int bar_number)
241 if (scm_is_pair (accidentals) && !scm_is_symbol (scm_car (accidentals)))
242 warning (_f ("accidental typesetting list must begin with context-name: %s",
243 ly_scm2string (scm_car (accidentals)).c_str ()));
245 for (; scm_is_pair (accidentals) && origin;
246 accidentals = scm_cdr (accidentals))
248 // If pair then it is a new accidentals typesetting rule to be checked
249 SCM rule = scm_car (accidentals);
250 if (scm_is_pair (rule))
252 SCM type = scm_car (rule);
253 SCM laziness = scm_cdr (rule);
254 SCM localsig = origin->get_property ("localKeySignature");
257 = scm_is_eq (ly_symbol2scm ("same-octave"), type);
259 = scm_is_eq (ly_symbol2scm ("any-octave"), type);
261 if (same_octave_b || any_octave_b)
264 int n = number_accidentals_from_sig
265 (&d, localsig, pitch, bar_number, laziness, any_octave_b);
266 *different = *different || d;
267 number = max (number, n);
270 warning (_f ("ignoring unknown accidental: %s",
271 ly_symbol2string (type).c_str ()));
274 /* if symbol then it is a context name. Scan parent contexts to
276 else if (scm_is_symbol (rule))
278 Context *dad = origin;
279 while (dad && !dad->is_alias (rule))
280 dad = dad->get_parent_context ();
286 warning (_f ("pair or context-name expected for accidental rule, found %s",
287 ly_scm2string (rule).c_str ()));
294 Accidental_engraver::get_bar_number ()
296 SCM barnum = get_property ("internalBarNumber");
297 SCM smp = get_property ("measurePosition");
299 int bn = robust_scm2int (barnum, 0);
301 Moment mp = robust_scm2moment (smp, Moment (0));
302 if (mp.main_part_ < Rational (0))
309 Accidental_engraver::process_acknowledged ()
311 if (accidentals_.size () && !accidentals_.back ().done_)
313 SCM accidentals = get_property ("autoAccidentals");
314 SCM cautionaries = get_property ("autoCautionaries");
315 int barnum = get_bar_number ();
317 for (vsize i = 0; i < accidentals_.size (); i++)
319 if (accidentals_[i].done_)
321 accidentals_[i].done_ = true;
323 Stream_event *note = accidentals_[i].melodic_;
324 Context *origin = accidentals_[i].origin_;
326 Pitch *pitch = unsmob_pitch (note->get_property ("pitch"));
330 bool different = false;
331 bool different_caut = false;
333 int num = number_accidentals (&different,
335 accidentals, barnum);
336 int num_caut = number_accidentals (&different_caut,
338 cautionaries, barnum);
341 bool cautionary = to_boolean (note->get_property ("cautionary"));
345 different = different_caut;
349 bool forced = to_boolean (note->get_property ("force-accidental"));
350 if (num == 0 && forced)
353 /* Cannot look for ties: it's not guaranteed that they reach
354 us before the notes. */
356 && !note->in_event_class ("trill-span-event"))
357 create_accidental (&accidentals_[i], num > 1, cautionary);
360 if (forced || cautionary)
361 accidentals_[i].accidental_->set_property ("forced", SCM_BOOL_T);
367 Accidental_engraver::create_accidental (Accidental_entry *entry,
368 bool restore_natural,
371 Stream_event *note = entry->melodic_;
372 Grob *support = entry->head_;
373 Pitch *pitch = unsmob_pitch (note->get_property ("pitch"));
375 bool as_suggestion = to_boolean (entry->origin_->get_property ("suggestAccidentals"));
378 a = make_suggested_accidental (note, support, entry->origin_engraver_);
380 a = make_standard_accidental (note, support, entry->origin_engraver_);
382 SCM accs = scm_cons (scm_from_int (pitch->get_alteration ()),
386 if (to_boolean (get_property ("extraNatural")))
387 accs = scm_cons (scm_from_int (0), accs);
390 /* TODO: add cautionary option in accidental. */
392 a->set_property ("cautionary", SCM_BOOL_T);
394 a->set_property ("accidentals", accs);
395 entry->accidental_ = a;
399 Accidental_engraver::make_standard_accidental (Stream_event *note,
406 We construct the accidentals at the originating Voice
407 level, so that we get the property settings for
408 Accidental from the respective Voice.
410 Grob *a = trans->make_item ("Accidental", note_head->self_scm ());
413 We add the accidentals to the support of the arpeggio,
414 so it is put left of the accidentals.
416 for (vsize i = 0; i < left_objects_.size (); i++)
418 if (left_objects_[i]->get_property ("side-axis") == scm_from_int (X_AXIS))
419 Side_position_interface::add_support (left_objects_[i], a);
425 for (vsize i = 0; i < right_objects_.size (); i++)
426 Side_position_interface::add_support (a, right_objects_[i]);
428 a->set_parent (note_head, Y_AXIS);
430 if (!accidental_placement_)
431 accidental_placement_ = make_item ("AccidentalPlacement",
433 Accidental_placement::add_accidental (accidental_placement_, a);
435 note_head->set_object ("accidental-grob", a->self_scm ());
441 Accidental_engraver::make_suggested_accidental (Stream_event *note,
446 Grob *a = trans->make_item ("AccidentalSuggestion", note_head->self_scm ());
448 Side_position_interface::add_support (a, note_head);
449 if (Grob *stem = unsmob_grob (a->get_object ("stem")))
450 Side_position_interface::add_support (a, stem);
452 a->set_parent (note_head, X_AXIS);
457 Accidental_engraver::finalize ()
459 last_keysig_ = SCM_EOL;
463 Accidental_engraver::stop_translation_timestep ()
465 for (vsize j = ties_.size (); j--;)
467 Grob *r = Tie::head (ties_[j], RIGHT);
468 for (vsize i = accidentals_.size (); i--;)
469 if (accidentals_[i].head_ == r)
471 if (Grob *g = accidentals_[i].accidental_)
473 g->set_object ("tie", ties_[j]->self_scm ());
474 accidentals_[i].tied_ = true;
476 ties_.erase (ties_.begin () + j);
481 for (vsize i = accidentals_.size (); i--;)
483 int barnum = get_bar_number ();
485 Stream_event *note = accidentals_[i].melodic_;
486 Context *origin = accidentals_[i].origin_;
488 Pitch *pitch = unsmob_pitch (note->get_property ("pitch"));
492 int n = pitch->get_notename ();
493 int o = pitch->get_octave ();
494 int a = pitch->get_alteration ();
495 SCM key = scm_cons (scm_from_int (o), scm_from_int (n));
497 SCM localsig = SCM_EOL;
499 && origin->where_defined (ly_symbol2scm ("localKeySignature"), &localsig))
502 if (accidentals_[i].tied_)
505 Remember an alteration that is different both from
506 that of the tied note and of the key signature.
508 localsig = ly_assoc_front_x
509 (localsig, key, scm_cons (SCM_BOOL_T, scm_from_int (barnum)));
516 not really really correct if there are more than one
517 noteheads with the same notename.
519 localsig = ly_assoc_front_x (localsig, key,
520 scm_cons (scm_from_int (a),
521 scm_from_int (barnum)));
526 origin->set_property ("localKeySignature", localsig);
528 origin = origin->get_parent_context ();
532 accidental_placement_ = 0;
533 accidentals_.clear ();
534 left_objects_.clear ();
535 right_objects_.clear ();
539 Accidental_engraver::acknowledge_rhythmic_head (Grob_info info)
541 Stream_event *note = info.event_cause ();
543 && (note->in_event_class ("note-event")
544 || note->in_event_class ("trill-span-event")))
547 string harmonics usually don't have accidentals.
549 if (to_boolean (get_property ("harmonicAccidentals"))
550 || !ly_is_equal (info.grob ()->get_property ("style"),
551 ly_symbol2scm ("harmonic")))
553 Accidental_entry entry;
554 entry.head_ = info.grob ();
555 entry.origin_engraver_ = dynamic_cast<Engraver *> (info.origin_translator ());
556 entry.origin_ = entry.origin_engraver_->context ();
557 entry.melodic_ = note;
559 accidentals_.push_back (entry);
565 Accidental_engraver::acknowledge_tie (Grob_info info)
567 ties_.push_back (dynamic_cast<Spanner *> (info.grob ()));
571 Accidental_engraver::acknowledge_arpeggio (Grob_info info)
573 left_objects_.push_back (info.grob ());
577 Accidental_engraver::acknowledge_finger (Grob_info info)
579 left_objects_.push_back (info.grob ());
583 Accidental_engraver::process_music ()
585 SCM sig = get_property ("keySignature");
586 /* Detect key sig changes.
587 Update all parents and children. */
588 if (last_keysig_ != sig)
589 update_local_key_signature ();
592 ADD_ACKNOWLEDGER (Accidental_engraver, arpeggio);
593 ADD_ACKNOWLEDGER (Accidental_engraver, finger);
594 ADD_ACKNOWLEDGER (Accidental_engraver, rhythmic_head);
595 ADD_ACKNOWLEDGER (Accidental_engraver, tie);
597 ADD_TRANSLATOR (Accidental_engraver,
600 "Catch note heads, ties and notices key-change events. "
601 "This engraver usually lives at Staff level, but "
602 "reads the settings for Accidental at @code{Voice} level, "
603 "so you can @code{\\override} them at @code{Voice}. ",
604 "Accidental AccidentalSuggestion",
610 "harmonicAccidentals "
612 "localKeySignature");