2 context.cc -- implement Context
4 source file of the GNU LilyPond music typesetter
6 (c) 2004 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "object-key.hh"
11 #include "context-def.hh"
12 #include "context-selector.hh"
14 #include "ly-smobs.icc"
16 #include "output-def.hh"
17 #include "scm-hash.hh"
18 #include "score-context.hh"
19 #include "translator-group.hh"
21 #include "lilypond-key.hh"
24 Context::is_removable () const
26 return context_list_ == SCM_EOL && ! iterator_count_ &&
27 !dynamic_cast<Score_context const*> (this);
31 Context::check_removal ()
33 for (SCM p = context_list_; scm_is_pair (p); p = scm_cdr (p))
35 Context *trg = unsmob_context (scm_car (p));
37 trg->check_removal ();
38 if (trg->is_removable ())
40 recurse_over_translators (trg, &Translator::finalize, UP);
46 Context::Context (Context const&)
52 Context::properties_dict () const
54 return Scheme_hash_table::unsmob (properties_scm_);
58 Context::add_context (Context *t)
60 SCM ts = t->self_scm ();
61 context_list_ = ly_append2 (context_list_,
62 scm_cons (ts, SCM_EOL));
64 t->daddy_context_ = this;
69 Context_selector::register_context (t);
71 scm_gc_unprotect_object (ts);
72 Context_def *td = unsmob_context_def (t->definition_);
75 this can not move before add_context (), because \override
76 operations require that we are in the hierarchy.
78 td->apply_default_property_operations (t);
80 recurse_over_translators (t, &Translator::initialize, DOWN);
85 Context::get_key () const
90 Context::Context (Object_key const* key)
97 implementation_ = SCM_EOL;
98 properties_scm_ = SCM_EOL;
99 accepts_list_ = SCM_EOL;
100 context_list_ = SCM_EOL;
101 definition_ = SCM_EOL;
105 properties_scm_ = (new Scheme_hash_table)->self_scm ();
106 scm_gc_unprotect_object (properties_scm_);
112 Context::find_create_context (SCM n, String id, SCM operations)
115 Don't create multiple score contexts.
117 if (dynamic_cast<Global_context*> (this)
118 && dynamic_cast<Global_context*> (this)->get_score_context ())
119 return get_score_context ()->find_create_context (n, id, operations);
121 if (Context *existing = find_context_below (this, n, id))
124 if (n == ly_symbol2scm ("Bottom"))
126 Context* tg = get_default_interpreter ();
132 TODO: use accepts_list_.
134 Link_array<Context_def> path
135 = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ());
139 Context * current = this;
141 // start at 1. The first one (index 0) will be us.
142 for (int i=0; i < path.size (); i++)
144 SCM ops = (i == path.size () -1) ? operations : SCM_EOL;
147 if (i == path.size () -1)
152 Object_key const *key = get_context_key (ly_symbol2string (path[i]->get_context_name()), this_id);
155 = path[i]->instantiate (ops, key);
156 scm_gc_unprotect_object (key->self_scm ());
158 new_group->id_string_ = this_id;
159 current->add_context (new_group);
160 apply_property_operations (new_group, ops);
169 Don't go up to Global_context, because global goes down to
173 if (daddy_context_ && !dynamic_cast<Global_context*> (daddy_context_))
174 ret = daddy_context_->find_create_context (n, id, operations);
177 warning (_f ("Cannot find or create `%s' called `%s'",
178 ly_symbol2string (n).to_str0 (), id));
185 Context::get_context_key (String type, String id)
187 String now_key = type + "@" + id;
189 int disambiguation_count = 0;
190 if (context_counts_.find (now_key) != context_counts_.end ())
192 disambiguation_count = context_counts_[now_key];
195 context_counts_[now_key] = disambiguation_count + 1;
198 return new Lilypond_context_key (get_key (),
201 disambiguation_count);
205 Context::get_grob_key (String name)
207 int disambiguation_count = 0;
208 if (grob_counts_.find (name) != grob_counts_.end ())
210 disambiguation_count = grob_counts_[name];
212 grob_counts_[name] = disambiguation_count + 1;
214 Object_key * k = new Lilypond_grob_key (get_key(),
217 disambiguation_count);
225 Default child context as a SCM string, or something else if there is
229 Context::default_child_context_name () const
231 return scm_is_pair (accepts_list_)
232 ? scm_car (scm_last_pair (accepts_list_))
238 Context::is_bottom_context () const
240 return !scm_is_symbol (default_child_context_name ());
244 Context::get_default_interpreter ()
246 if (!is_bottom_context ())
248 SCM nm = default_child_context_name ();
249 SCM st = find_context_def (get_output_def (), nm);
251 String name = ly_symbol2string (nm);
252 Context_def *t = unsmob_context_def (st);
255 warning (_f ("can't find or create: `%s'", name.to_str0 ()));
256 t = unsmob_context_def (this->definition_);
259 Object_key const *key = get_context_key (name, "");
261 Context *tg = t->instantiate (SCM_EOL, key);
263 if (!tg->is_bottom_context ())
264 return tg->get_default_interpreter ();
275 Context::where_defined (SCM sym) const
277 if (properties_dict ()->contains (sym))
279 return (Context*)this;
282 return (daddy_context_) ? daddy_context_->where_defined (sym) : 0;
286 return SCM_EOL when not found.
289 Context::internal_get_property (SCM sym) const
292 if (properties_dict ()->try_retrieve (sym, &val))
296 return daddy_context_->internal_get_property (sym);
302 Context::is_alias (SCM sym) const
304 if (sym == ly_symbol2scm ("Bottom")
305 && !scm_is_pair (accepts_list_))
307 if (sym == unsmob_context_def (definition_)->get_context_name ())
310 return scm_c_memq (sym, aliases_) != SCM_BOOL_F;
314 Context::add_alias (SCM sym)
316 aliases_ = scm_cons (sym, aliases_);
322 Context::internal_set_property (SCM sym, SCM val)
325 if (internal_type_checking_global_b)
326 assert (type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")));
329 properties_dict ()->set (sym, val);
333 TODO: look up to check whether we have inherited var?
336 Context::unset_property (SCM sym)
338 properties_dict ()->remove (sym);
342 Remove a context from the hierarchy.
345 Context::remove_context (Context*trans)
349 context_list_ = scm_delq_x (trans->self_scm (), context_list_);
350 trans->daddy_context_ = 0;
355 ID == "" means accept any ID.
358 find_context_below (Context * where,
361 if (where->is_alias (type))
363 if (id == "" || where->id_string () == id)
368 for (SCM s = where->children_contexts ();
369 !found && scm_is_pair (s); s = scm_cdr (s))
371 Context *tr = unsmob_context (scm_car (s));
373 found = find_context_below (tr, type, id);
380 Context::properties_as_alist () const
382 return properties_dict ()->to_alist ();
386 Context::context_name_symbol () const
388 Context_def *td = unsmob_context_def (definition_);
389 return td->get_context_name ();
393 Context::context_name () const
395 return ly_symbol2string (context_name_symbol ());
399 Context::get_score_context () const
401 if (Score_context *sc = dynamic_cast<Score_context*> ((Context*) this))
403 else if (daddy_context_)
404 return daddy_context_->get_score_context ();
410 Context::get_output_def () const
412 return daddy_context_ ? daddy_context_->get_output_def () : 0;
421 Context::now_mom () const
423 return daddy_context_->now_mom ();
427 Context::print_smob (SCM s, SCM port, scm_print_state *)
429 Context *sc = (Context *) SCM_CELL_WORD_1 (s);
431 scm_puts ("#<", port);
432 scm_puts (classname (sc), port);
433 if (Context_def *d = unsmob_context_def (sc->definition_))
435 scm_puts (" ", port);
436 scm_display (d->get_context_name (), port);
439 if (Context *td=dynamic_cast<Context *> (sc))
441 scm_puts ("=", port);
442 scm_puts (td->id_string_.to_str0 (), port);
446 scm_puts (" ", port);
448 scm_display (sc->context_list_, port);
449 scm_puts (" >", port);
455 Context::mark_smob (SCM sm)
457 Context *me = (Context*) SCM_CELL_WORD_1 (sm);
458 scm_gc_mark (me->key_->self_scm ());
459 scm_gc_mark (me->context_list_);
460 scm_gc_mark (me->aliases_);
461 scm_gc_mark (me->definition_);
462 scm_gc_mark (me->properties_scm_);
463 scm_gc_mark (me->accepts_list_);
464 scm_gc_mark (me->implementation_);
466 return me->properties_scm_;
469 IMPLEMENT_SMOBS (Context);
470 IMPLEMENT_DEFAULT_EQUAL_P (Context);
471 IMPLEMENT_TYPE_P (Context,"ly:context?");
474 Context::try_music (Music* m)
476 Translator* t = implementation ();
480 bool b = t->try_music (m);
481 if (!b && daddy_context_)
482 b = daddy_context_->try_music (m);
489 Context::get_global_context () const
491 if (dynamic_cast<Global_context *>((Context*) this))
492 return dynamic_cast<Global_context *> ((Context*) this);
495 return daddy_context_->get_global_context ();
497 programming_error ("No Global context!");
502 Context::get_parent_context () const
504 return daddy_context_;
508 Context::implementation () const
510 return dynamic_cast<Translator_group*> (unsmob_translator (implementation_));
514 Context::clear_key_disambiguations ()
516 grob_counts_.clear();
517 context_counts_.clear();
518 for (SCM s = context_list_; scm_is_pair (s); s = scm_cdr (s))
520 unsmob_context (scm_car (s))->clear_key_disambiguations();