2 context.cc -- implement Context
4 source file of the GNU LilyPond music typesetter
6 (c) 2004--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
11 #include "program-option.hh"
12 #include "context-def.hh"
13 #include "ly-smobs.icc"
15 #include "output-def.hh"
16 #include "scm-hash.hh"
17 #include "score-context.hh"
18 #include "translator-group.hh"
20 #include "lilypond-key.hh"
25 Context::is_removable () const
27 return context_list_ == SCM_EOL && ! iterator_count_
28 && !dynamic_cast<Score_context const *> (this);
32 Context::check_removal ()
34 for (SCM p = context_list_; scm_is_pair (p); p = scm_cdr (p))
36 Context *trg = unsmob_context (scm_car (p));
38 trg->check_removal ();
39 if (trg->is_removable ())
41 recurse_over_translators (trg, &Translator::finalize,
42 &Translator_group::finalize,
49 Context::Context (Context const &)
55 Context::properties_dict () const
57 return Scheme_hash_table::unsmob (properties_scm_);
61 Context::add_context (Context *t)
63 SCM ts = t->self_scm ();
64 context_list_ = ly_append2 (context_list_,
65 scm_cons (ts, SCM_EOL));
67 t->daddy_context_ = this;
73 Context_def *td = unsmob_context_def (t->definition_);
75 /* This cannot move before add_context (), because \override
76 operations require that we are in the hierarchy. */
77 td->apply_default_property_operations (t);
79 recurse_over_translators (t,
80 &Translator::initialize,
81 &Translator_group::initialize,
87 Context::get_key () const
92 Context::Context (Object_key const *key)
100 properties_scm_ = SCM_EOL;
101 accepts_list_ = SCM_EOL;
102 context_list_ = SCM_EOL;
103 definition_ = SCM_EOL;
107 Scheme_hash_table *tab = new Scheme_hash_table;
108 properties_scm_ = tab->unprotect ();
115 ((Object_key*)key)->unprotect ();
118 /* TODO: this shares code with find_create_context (). */
120 Context::create_unique_context (SCM n, SCM operations)
123 Don't create multiple score contexts.
125 if (dynamic_cast<Global_context *> (this)
126 && dynamic_cast<Global_context *> (this)->get_score_context ())
127 return get_score_context ()->create_unique_context (n, operations);
130 TODO: use accepts_list_.
132 Link_array<Context_def> path
133 = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ());
137 Context *current = this;
139 // start at 1. The first one (index 0) will be us.
140 for (int i = 0; i < path.size (); i++)
142 SCM ops = (i == path.size () -1) ? operations : SCM_EOL;
144 current = current->create_context (path[i],
153 Don't go up to Global_context, because global goes down to
157 if (daddy_context_ && !dynamic_cast<Global_context *> (daddy_context_))
158 ret = daddy_context_->create_unique_context (n, operations);
161 warning (_f ("can't find or create new `%s'",
162 ly_symbol2string (n).to_str0 ()));
169 Context::find_create_context (SCM n, String id, SCM operations)
172 Don't create multiple score contexts.
174 if (dynamic_cast<Global_context *> (this)
175 && dynamic_cast<Global_context *> (this)->get_score_context ())
176 return get_score_context ()->find_create_context (n, id, operations);
178 if (Context *existing = find_context_below (this, n, id))
181 if (n == ly_symbol2scm ("Bottom"))
183 Context *tg = get_default_interpreter ();
188 TODO: use accepts_list_.
190 Link_array<Context_def> path
191 = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ());
195 Context *current = this;
197 // start at 1. The first one (index 0) will be us.
198 for (int i = 0; i < path.size (); i++)
200 SCM ops = (i == path.size () -1) ? operations : SCM_EOL;
203 if (i == path.size () -1)
208 current = current->create_context (path[i],
217 Don't go up to Global_context, because global goes down to
221 if (daddy_context_ && !dynamic_cast<Global_context *> (daddy_context_))
222 ret = daddy_context_->find_create_context (n, id, operations);
225 warning (_f ("can't find or create `%s' called `%s'",
226 ly_symbol2string (n).to_str0 (), id));
233 Context::create_context (Context_def *cdef,
237 String type = ly_symbol2string (cdef->get_context_name ());
238 Object_key const *key = get_context_key (type, id);
240 = cdef->instantiate (ops, key);
242 new_context->id_string_ = id;
243 add_context (new_context);
244 apply_property_operations (new_context, ops);
250 Context::get_context_key (String type, String id)
252 if (!use_object_keys)
255 String now_key = type + "@" + id;
257 int disambiguation_count = 0;
258 if (context_counts_.find (now_key) != context_counts_.end ())
260 disambiguation_count = context_counts_[now_key];
263 context_counts_[now_key] = disambiguation_count + 1;
265 return new Lilypond_context_key (get_key (),
268 disambiguation_count);
272 Context::get_grob_key (String name)
274 if (!use_object_keys)
277 int disambiguation_count = 0;
278 if (grob_counts_.find (name) != grob_counts_.end ())
280 disambiguation_count = grob_counts_[name];
282 grob_counts_[name] = disambiguation_count + 1;
284 Object_key *k = new Lilypond_grob_key (get_key (),
287 disambiguation_count);
293 Default child context as a SCM string, or something else if there is
297 Context::default_child_context_name () const
299 return scm_is_pair (accepts_list_)
300 ? scm_car (accepts_list_)
305 Context::is_bottom_context () const
307 return !scm_is_symbol (default_child_context_name ());
311 Context::get_default_interpreter ()
313 if (!is_bottom_context ())
315 SCM nm = default_child_context_name ();
316 SCM st = find_context_def (get_output_def (), nm);
318 String name = ly_symbol2string (nm);
319 Context_def *t = unsmob_context_def (st);
322 warning (_f ("can't find or create: `%s'", name.to_str0 ()));
323 t = unsmob_context_def (this->definition_);
326 Context *tg = create_context (t, "", SCM_EOL);
327 if (!tg->is_bottom_context ())
328 return tg->get_default_interpreter ();
339 Context::where_defined (SCM sym, SCM *value) const
342 if (profile_property_accesses)
344 note_property_access (&context_property_lookup_table, sym);
348 if (properties_dict ()->try_retrieve (sym, value))
350 return (Context *)this;
353 return (daddy_context_) ? daddy_context_->where_defined (sym, value) : 0;
357 return SCM_EOL when not found.
360 Context::internal_get_property (SCM sym) const
363 if (profile_property_accesses)
365 note_property_access (&context_property_lookup_table, sym);
370 if (properties_dict ()->try_retrieve (sym, &val))
374 return daddy_context_->internal_get_property (sym);
380 Context::is_alias (SCM sym) const
382 if (sym == ly_symbol2scm ("Bottom")
383 && !scm_is_pair (accepts_list_))
385 if (sym == unsmob_context_def (definition_)->get_context_name ())
388 return scm_c_memq (sym, aliases_) != SCM_BOOL_F;
392 Context::add_alias (SCM sym)
394 aliases_ = scm_cons (sym, aliases_);
398 Context::internal_set_property (SCM sym, SCM val)
401 if (do_internal_type_checking_global)
402 assert (type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")));
405 properties_dict ()->set (sym, val);
409 TODO: look up to check whether we have inherited var?
412 Context::unset_property (SCM sym)
414 properties_dict ()->remove (sym);
418 Remove a context from the hierarchy.
421 Context::remove_context (Context *trans)
425 context_list_ = scm_delq_x (trans->self_scm (), context_list_);
426 trans->daddy_context_ = 0;
431 ID == "" means accept any ID.
434 find_context_below (Context *where,
437 if (where->is_alias (type))
439 if (id == "" || where->id_string () == id)
444 for (SCM s = where->children_contexts ();
445 !found && scm_is_pair (s); s = scm_cdr (s))
447 Context *tr = unsmob_context (scm_car (s));
449 found = find_context_below (tr, type, id);
456 Context::properties_as_alist () const
458 return properties_dict ()->to_alist ();
462 Context::context_name_symbol () const
464 Context_def *td = unsmob_context_def (definition_);
465 return td->get_context_name ();
469 Context::context_name () const
471 return ly_symbol2string (context_name_symbol ());
475 Context::get_score_context () const
477 if (Score_context *sc = dynamic_cast<Score_context *> ((Context *) this))
479 else if (daddy_context_)
480 return daddy_context_->get_score_context ();
486 Context::get_output_def () const
488 return daddy_context_ ? daddy_context_->get_output_def () : 0;
496 Context::now_mom () const
498 return daddy_context_->now_mom ();
502 Context::print_smob (SCM s, SCM port, scm_print_state *)
504 Context *sc = (Context *) SCM_CELL_WORD_1 (s);
506 scm_puts ("#<", port);
507 scm_puts (classname (sc), port);
508 if (Context_def *d = unsmob_context_def (sc->definition_))
510 scm_puts (" ", port);
511 scm_display (d->get_context_name (), port);
514 if (!sc->id_string_.is_empty ())
516 scm_puts ("=", port);
517 scm_puts (sc->id_string_.to_str0 (), port);
520 scm_puts (" ", port);
522 scm_display (sc->context_list_, port);
523 scm_puts (" >", port);
529 Context::mark_smob (SCM sm)
531 Context *me = (Context *) SCM_CELL_WORD_1 (sm);
533 scm_gc_mark (me->key_->self_scm ());
535 scm_gc_mark (me->context_list_);
536 scm_gc_mark (me->aliases_);
537 scm_gc_mark (me->definition_);
538 scm_gc_mark (me->properties_scm_);
539 scm_gc_mark (me->accepts_list_);
540 if (me->implementation_)
541 scm_gc_mark (me->implementation_->self_scm ());
543 return me->properties_scm_;
546 IMPLEMENT_SMOBS (Context);
547 IMPLEMENT_DEFAULT_EQUAL_P (Context);
548 IMPLEMENT_TYPE_P (Context, "ly:context?");
551 Context::try_music (Music *m)
553 Translator_group *t = implementation ();
557 bool b = t->try_music (m);
558 if (!b && daddy_context_)
559 b = daddy_context_->try_music (m);
565 Context::get_global_context () const
567 if (dynamic_cast<Global_context *> ((Context *) this))
568 return dynamic_cast<Global_context *> ((Context *) this);
571 return daddy_context_->get_global_context ();
573 programming_error ("no Global context");
578 Context::get_parent_context () const
580 return daddy_context_;
584 Context::clear_key_disambiguations ()
586 if (!use_object_keys)
589 grob_counts_.clear ();
590 context_counts_.clear ();
591 for (SCM s = context_list_; scm_is_pair (s); s = scm_cdr (s))
593 unsmob_context (scm_car (s))->clear_key_disambiguations ();
599 Ugh. Where to put this?
602 measure_length (Context const *context)
604 SCM l = context->get_property ("measureLength");
606 if (unsmob_moment (l))
607 length = unsmob_moment (l)->main_part_;
612 measure_position (Context const *context)
614 SCM sm = context->get_property ("measurePosition");
617 if (unsmob_moment (sm))
619 m = *unsmob_moment (sm);
621 if (m.main_part_ < Rational (0))
623 Rational length (measure_length (context));
624 while (m.main_part_ < Rational (0))
625 m.main_part_ += length;