2 piano-pedal-engraver.cc -- implement Piano_pedal_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2007 Jan Nieuwenhuizen <janneke@gnu.org>,
7 Erik Sandberg <mandolaerik@gmail.com>
9 Chris Jackson <chris@fluffhouse.org.uk> - extended to support
13 #include "engraver.hh"
15 #include "axis-group-interface.hh"
17 #include "directional-element-interface.hh"
18 #include "international.hh"
19 #include "lily-guile.hh"
20 #include "note-column.hh"
21 #include "side-position-interface.hh"
22 #include "staff-symbol-referencer.hh"
23 #include "stream-event.hh"
24 #include "string-convert.hh"
29 #include "translator.icc"
36 * Junk hardcoded sustain/sostenuto/una_corda distinction;
37 Softcode using (list (sustain-event SustainPedal PianoPedalBracket) ... )
39 * Try to use same engraver for dynamics.
43 /* Ugh: This declaration is duplicated in piano-pedal-performer */
44 typedef enum Pedal_type {
52 Static precalculated data (symbols and strings) for the different
55 struct Pedal_type_info
62 const char *pedal_c_str_;
66 event_class_sym_ = SCM_EOL;
68 strings_sym_ = SCM_EOL;
73 scm_gc_protect_object (event_class_sym_);
74 scm_gc_protect_object (style_sym_);
75 scm_gc_protect_object (strings_sym_);
81 const Pedal_type_info *type_;
84 Event for currently running pedal.
86 Stream_event *current_bracket_ev_;
89 Event for currently starting pedal, (necessary?
91 distinct from current_bracket_ev_, since current_bracket_ev_ only
92 necessary for brackets, not for text style.
94 Stream_event *start_ev_;
97 Events that were found in this timestep.
99 Drul_array<Stream_event *> event_drul_;
101 Spanner *bracket_; // A single portion of a pedal bracket
102 Spanner *finished_bracket_;
105 static Pedal_type_info pedal_types_[NUM_PEDAL_TYPES];
107 class Piano_pedal_engraver : public Engraver
110 TRANSLATOR_DECLARATIONS (Piano_pedal_engraver);
113 virtual void initialize ();
114 virtual void finalize ();
115 DECLARE_TRANSLATOR_LISTENER (sustain);
116 DECLARE_TRANSLATOR_LISTENER (una_corda);
117 DECLARE_TRANSLATOR_LISTENER (sostenuto);
118 DECLARE_ACKNOWLEDGER (note_column);
119 void stop_translation_timestep ();
120 void process_music ();
123 Pedal_info info_list_[NUM_PEDAL_TYPES + 1];
125 void create_text_grobs (Pedal_info *p, bool);
126 void create_bracket_grobs (Pedal_info *p, bool);
127 void typeset_all (Pedal_info *p);
134 const char *names [NUM_PEDAL_TYPES];
135 names[SOSTENUTO] = "Sostenuto";
136 names[SUSTAIN] = "Sustain";
137 names[UNA_CORDA] = "UnaCorda";
139 for (int i = 0; i < NUM_PEDAL_TYPES; i++)
141 const char *name = names[i];
143 string base_name = name;
145 string base_ident = "";
148 for (cur_pos = 1; name[cur_pos]; cur_pos++)
149 if (isupper (name[cur_pos]))
151 base_ident = base_ident + String_convert::to_lower (string (name, prev_pos, cur_pos - prev_pos)) + "-";
154 base_ident += String_convert::to_lower (string (name, prev_pos, cur_pos - prev_pos));
157 be careful, as we don't want to loose references to the _sym_ members.
159 Pedal_type_info info;
160 info.event_class_sym_ = scm_str2symbol ((base_ident + "-event").c_str ());
161 info.style_sym_ = scm_str2symbol (("pedal" + base_name + "Style").c_str ());
162 info.strings_sym_ = scm_str2symbol (("pedal" + base_name + "Strings").c_str ());
164 info.base_name_ = name;
165 info.pedal_c_str_ = strdup ((base_name + "Pedal").c_str ());
169 pedal_types_[i] = info;
173 ADD_SCM_INIT_FUNC (Piano_pedal_engraver_init_pedal_types_, init_pedal_types);
175 Piano_pedal_engraver::Piano_pedal_engraver ()
180 Piano_pedal_engraver::initialize ()
182 for (int i = 0; i < NUM_PEDAL_TYPES; i++)
184 Pedal_type_info *s = &pedal_types_[i];
185 Pedal_info *info = &info_list_[i];
190 info->finished_bracket_ = 0;
191 info->current_bracket_ev_ = 0;
192 info->event_drul_[START] = 0;
193 info->event_drul_[STOP] = 0;
196 info_list_[NUM_PEDAL_TYPES].type_ = 0;
205 Piano_pedal_engraver::acknowledge_note_column (Grob_info info)
207 for (Pedal_info *p = info_list_; p->type_; p++)
210 add_bound_item (p->bracket_, info.grob ());
211 if (p->finished_bracket_)
212 add_bound_item (p->finished_bracket_, info.grob ());
216 IMPLEMENT_TRANSLATOR_LISTENER (Piano_pedal_engraver, sostenuto);
218 Piano_pedal_engraver::listen_sostenuto (Stream_event *ev)
220 Direction d = to_dir (ev->get_property ("span-direction"));
221 ASSIGN_EVENT_ONCE (info_list_[SOSTENUTO].event_drul_[d], ev);
224 IMPLEMENT_TRANSLATOR_LISTENER (Piano_pedal_engraver, sustain);
226 Piano_pedal_engraver::listen_sustain (Stream_event *ev)
228 Direction d = to_dir (ev->get_property ("span-direction"));
229 ASSIGN_EVENT_ONCE (info_list_[SUSTAIN].event_drul_[d], ev);
232 IMPLEMENT_TRANSLATOR_LISTENER (Piano_pedal_engraver, una_corda);
234 Piano_pedal_engraver::listen_una_corda (Stream_event *ev)
236 Direction d = to_dir (ev->get_property ("span-direction"));
237 ASSIGN_EVENT_ONCE (info_list_[UNA_CORDA].event_drul_[d], ev);
241 Piano_pedal_engraver::process_music ()
243 for (Pedal_info *p = info_list_; p->type_; p++)
245 if (p->event_drul_[STOP] || p->event_drul_[START])
247 /* Choose the appropriate grobs to add to the line spanner
248 These can be text items or text-spanners
252 ugh, code dup, should read grob to create from other
255 bracket: |_________/\____|
257 mixed: Ped. _____/\____|
260 SCM style = internal_get_property (p->type_->style_sym_);
262 bool mixed = style == ly_symbol2scm ("mixed");
263 bool bracket = (mixed
264 || style == ly_symbol2scm ("bracket"));
265 bool text = (style == ly_symbol2scm ("text")
268 if (text && !p->item_)
269 create_text_grobs (p, mixed);
271 create_bracket_grobs (p, mixed);
277 Piano_pedal_engraver::create_text_grobs (Pedal_info *p, bool mixed)
280 SCM strings = internal_get_property (p->type_->strings_sym_);
282 if (scm_ilength (strings) < 3)
284 Stream_event *m = p->event_drul_[START];
285 if (!m) m = p->event_drul_ [STOP];
287 string msg = _f ("expect 3 strings for piano pedals, found: %ld",
288 scm_ilength (strings));
290 m->origin ()->warning (msg);
297 if (p->event_drul_[STOP] && p->event_drul_[START])
302 p->event_drul_[STOP]->origin ()->warning (_f ("cannot find start of piano pedal: `%s'", p->type_->base_name_.c_str ()));
304 s = scm_cadr (strings);
305 p->start_ev_ = p->event_drul_[START];
308 else if (p->event_drul_[STOP])
313 p->event_drul_[STOP]->origin ()->warning (_f ("cannot find start of piano pedal: `%s'", p->type_->base_name_.c_str ()));
315 s = scm_caddr (strings);
319 else if (p->event_drul_[START])
321 p->start_ev_ = p->event_drul_[START];
322 s = scm_car (strings);
325 if (scm_is_string (s))
327 const char *propname = p->type_->pedal_c_str_;
329 p->item_ = make_item (propname, (p->event_drul_[START]
330 ? p->event_drul_[START]
331 : p->event_drul_[STOP])->self_scm ());
333 p->item_->set_property ("text", s);
338 p->event_drul_[START] = 0;
339 p->event_drul_[STOP] = 0;
344 Piano_pedal_engraver::create_bracket_grobs (Pedal_info *p, bool mixed)
346 if (!p->bracket_ && p->event_drul_[STOP])
348 string msg = _f ("cannot find start of piano pedal bracket: `%s'", p->type_->base_name_.c_str ());
349 p->event_drul_[STOP]->origin ()->warning (msg);
350 p->event_drul_[STOP] = 0;
353 if (p->event_drul_[STOP])
355 assert (!p->finished_bracket_);
357 Grob *cmc = unsmob_grob (get_property ("currentMusicalColumn"));
359 if (!p->bracket_->get_bound (RIGHT))
360 p->bracket_->set_bound (RIGHT, cmc);
363 Set properties so that the stencil-creating function will
364 know whether the right edge should be flared ___/
367 if (!p->event_drul_[START])
369 SCM flare = p->bracket_->get_property ("bracket-flare");
370 if (scm_is_pair (flare))
371 p->bracket_->set_property ("bracket-flare", scm_cons (scm_car (flare),
372 scm_from_double (0)));
375 p->finished_bracket_ = p->bracket_;
378 announce_end_grob (p->finished_bracket_, p->event_drul_[STOP]->self_scm ());
380 p->current_bracket_ev_ = 0;
383 if (p->event_drul_[START])
385 p->start_ev_ = p->event_drul_[START];
386 p->current_bracket_ev_ = p->event_drul_[START];
388 p->bracket_ = make_spanner ("PianoPedalBracket", p->event_drul_[START]->self_scm ());
391 Set properties so that the stencil-creating function will
392 know whether the left edge should be flared \___
395 if (!p->finished_bracket_)
397 SCM flare = p->bracket_->get_property ("bracket-flare");
398 p->bracket_->set_property ("bracket-flare", scm_cons (scm_from_double (0), scm_cdr (flare)));
401 /* Set this property for 'mixed style' pedals, Ped._______/\ ,
402 so the stencil function will shorten the ____ line by the length of the Ped. text.
408 Mixed style: Store a pointer to the preceding text for use in
409 calculating the length of the line
414 WTF is pedal-text not the bound of the object? --hwn
417 p->bracket_->set_object ("pedal-text", p->item_->self_scm ());
421 p->event_drul_[START] = 0;
422 p->event_drul_[STOP] = 0;
426 Piano_pedal_engraver::finalize ()
428 for (Pedal_info *p = info_list_; p->type_; p++)
431 && !p->bracket_->is_live ())
436 SCM cc = get_property ("currentCommandColumn");
437 Item *c = unsmob_item (cc);
438 p->bracket_->set_bound (RIGHT, c);
440 p->finished_bracket_ = p->bracket_;
449 Piano_pedal_engraver::stop_translation_timestep ()
451 for (Pedal_info *p = info_list_; p->type_; p++)
455 if (p->bracket_ && !p->bracket_->get_bound (LEFT))
457 Grob *cmc = unsmob_grob (get_property ("currentMusicalColumn"));
459 if (!p->bracket_->get_bound (LEFT))
460 p->bracket_->set_bound (LEFT, cmc);
464 for (Pedal_info *p = info_list_; p->type_; p++)
466 p->event_drul_[STOP] = 0;
467 p->event_drul_[START] = 0;
472 Piano_pedal_engraver::typeset_all (Pedal_info *p)
477 if (p->finished_bracket_
478 && !p->finished_bracket_->is_live ())
479 p->finished_bracket_ = 0;
484 if (p->finished_bracket_)
486 Grob *r = p->finished_bracket_->get_bound (RIGHT);
488 p->finished_bracket_->set_bound (RIGHT, unsmob_grob (get_property ("currentMusicalColumn")));
490 p->finished_bracket_ = 0;
494 ADD_ACKNOWLEDGER (Piano_pedal_engraver, note_column);
496 ADD_TRANSLATOR (Piano_pedal_engraver,
498 "Engrave piano pedal symbols and brackets.",
507 "currentCommandColumn "
508 "pedalSostenutoStrings "
509 "pedalSostenutoStyle "
510 "pedalSustainStrings "
512 "pedalUnaCordaStrings "
513 "pedalUnaCordaStyle ",