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 "context-def.hh"
12 #include "ly-smobs.icc"
14 #include "output-def.hh"
15 #include "scm-hash.hh"
16 #include "score-context.hh"
17 #include "translator-group.hh"
19 #include "lilypond-key.hh"
22 Context::is_removable () const
24 return context_list_ == SCM_EOL && ! iterator_count_
25 && !dynamic_cast < Score_context const *> (this);
29 Context::check_removal ()
31 for (SCM p = context_list_; scm_is_pair (p); p = scm_cdr (p))
33 Context *trg = unsmob_context (scm_car (p));
35 trg->check_removal ();
36 if (trg->is_removable ())
38 recurse_over_translators (trg, &Translator::finalize, UP);
44 Context::Context (Context const &)
50 Context::properties_dict () const
52 return Scheme_hash_table::unsmob (properties_scm_);
56 Context::add_context (Context *t)
58 SCM ts = t->self_scm ();
59 context_list_ = ly_append2 (context_list_,
60 scm_cons (ts, SCM_EOL));
62 t->daddy_context_ = this;
67 scm_gc_unprotect_object (ts);
68 Context_def *td = unsmob_context_def (t->definition_);
71 this can not move before add_context (), because \override
72 operations require that we are in the hierarchy.
74 td->apply_default_property_operations (t);
76 recurse_over_translators (t, &Translator::initialize, DOWN);
81 Context::get_key () const
86 Context::Context (Object_key const *key)
93 implementation_ = SCM_EOL;
94 properties_scm_ = SCM_EOL;
95 accepts_list_ = SCM_EOL;
96 context_list_ = SCM_EOL;
97 definition_ = SCM_EOL;
100 properties_scm_ = (new Scheme_hash_table)->self_scm ();
101 scm_gc_unprotect_object (properties_scm_);
102 scm_gc_unprotect_object (key_->self_scm ());
106 TODO: this shares code with find_create_context().
109 Context::create_unique_context (SCM n, SCM operations)
112 Don't create multiple score contexts.
114 if (dynamic_cast<Global_context *> (this)
115 && dynamic_cast<Global_context *> (this)->get_score_context ())
116 return get_score_context ()->create_unique_context (n, operations);
119 TODO: use accepts_list_.
121 Link_array<Context_def> path
122 = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ());
126 Context *current = this;
128 // start at 1. The first one (index 0) will be us.
129 for (int i = 0; i < path.size (); i++)
131 SCM ops = (i == path.size () -1) ? operations : SCM_EOL;
133 current = current->create_context (path[i],
142 Don't go up to Global_context, because global goes down to
146 if (daddy_context_ && !dynamic_cast<Global_context *> (daddy_context_))
147 ret = daddy_context_->create_unique_context (n, operations);
150 warning (_f ("Cannot find or create new `%s'",
151 ly_symbol2string (n).to_str0 ()));
158 Context::find_create_context (SCM n, String id, SCM operations)
161 Don't create multiple score contexts.
163 if (dynamic_cast<Global_context *> (this)
164 && dynamic_cast<Global_context *> (this)->get_score_context ())
165 return get_score_context ()->find_create_context (n, id, operations);
167 if (Context *existing = find_context_below (this, n, id))
170 if (n == ly_symbol2scm ("Bottom"))
172 Context *tg = get_default_interpreter ();
177 TODO: use accepts_list_.
179 Link_array<Context_def> path
180 = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ());
184 Context *current = this;
186 // start at 1. The first one (index 0) will be us.
187 for (int i = 0; i < path.size (); i++)
189 SCM ops = (i == path.size () -1) ? operations : SCM_EOL;
192 if (i == path.size () -1)
197 current = current->create_context (path[i],
206 Don't go up to Global_context, because global goes down to
210 if (daddy_context_ && !dynamic_cast<Global_context *> (daddy_context_))
211 ret = daddy_context_->find_create_context (n, id, operations);
214 warning (_f ("Cannot find or create `%s' called `%s'",
215 ly_symbol2string (n).to_str0 (), id));
222 Context::create_context (Context_def *cdef,
226 String type = ly_symbol2string (cdef->get_context_name ());
227 Object_key const *key = get_context_key (type, id);
229 = cdef->instantiate (ops, key);
231 new_group->id_string_ = id;
232 add_context (new_group);
233 apply_property_operations (new_group, ops);
239 Context::get_context_key (String type, String id)
241 String now_key = type + "@" + id;
243 int disambiguation_count = 0;
244 if (context_counts_.find (now_key) != context_counts_.end ())
246 disambiguation_count = context_counts_[now_key];
249 context_counts_[now_key] = disambiguation_count + 1;
251 return new Lilypond_context_key (get_key (),
254 disambiguation_count);
258 Context::get_grob_key (String name)
260 int disambiguation_count = 0;
261 if (grob_counts_.find (name) != grob_counts_.end ())
263 disambiguation_count = grob_counts_[name];
265 grob_counts_[name] = disambiguation_count + 1;
267 Object_key *k = new Lilypond_grob_key (get_key (),
270 disambiguation_count);
276 Default child context as a SCM string, or something else if there is
280 Context::default_child_context_name () const
282 return scm_is_pair (accepts_list_)
283 ? scm_car (scm_last_pair (accepts_list_))
288 Context::is_bottom_context () const
290 return !scm_is_symbol (default_child_context_name ());
294 Context::get_default_interpreter ()
296 if (!is_bottom_context ())
298 SCM nm = default_child_context_name ();
299 SCM st = find_context_def (get_output_def (), nm);
301 String name = ly_symbol2string (nm);
302 Context_def *t = unsmob_context_def (st);
305 warning (_f ("can't find or create: `%s'", name.to_str0 ()));
306 t = unsmob_context_def (this->definition_);
309 Context *tg = create_context (t, "", SCM_EOL);
310 if (!tg->is_bottom_context ())
311 return tg->get_default_interpreter ();
322 Context::where_defined (SCM sym) const
324 if (properties_dict ()->contains (sym))
326 return (Context *)this;
329 return (daddy_context_) ? daddy_context_->where_defined (sym) : 0;
333 return SCM_EOL when not found.
336 Context::internal_get_property (SCM sym) const
339 if (properties_dict ()->try_retrieve (sym, &val))
343 return daddy_context_->internal_get_property (sym);
349 Context::is_alias (SCM sym) const
351 if (sym == ly_symbol2scm ("Bottom")
352 && !scm_is_pair (accepts_list_))
354 if (sym == unsmob_context_def (definition_)->get_context_name ())
357 return scm_c_memq (sym, aliases_) != SCM_BOOL_F;
361 Context::add_alias (SCM sym)
363 aliases_ = scm_cons (sym, aliases_);
367 Context::internal_set_property (SCM sym, SCM val)
370 if (do_internal_type_checking_global)
371 assert (type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")));
374 properties_dict ()->set (sym, val);
378 TODO: look up to check whether we have inherited var?
381 Context::unset_property (SCM sym)
383 properties_dict ()->remove (sym);
387 Remove a context from the hierarchy.
390 Context::remove_context (Context *trans)
394 context_list_ = scm_delq_x (trans->self_scm (), context_list_);
395 trans->daddy_context_ = 0;
400 ID == "" means accept any ID.
403 find_context_below (Context *where,
406 if (where->is_alias (type))
408 if (id == "" || where->id_string () == id)
413 for (SCM s = where->children_contexts ();
414 !found && scm_is_pair (s); s = scm_cdr (s))
416 Context *tr = unsmob_context (scm_car (s));
418 found = find_context_below (tr, type, id);
425 Context::properties_as_alist () const
427 return properties_dict ()->to_alist ();
431 Context::context_name_symbol () const
433 Context_def *td = unsmob_context_def (definition_);
434 return td->get_context_name ();
438 Context::context_name () const
440 return ly_symbol2string (context_name_symbol ());
444 Context::get_score_context () const
446 if (Score_context *sc = dynamic_cast<Score_context *> ((Context *) this))
448 else if (daddy_context_)
449 return daddy_context_->get_score_context ();
455 Context::get_output_def () const
457 return daddy_context_ ? daddy_context_->get_output_def () : 0;
466 Context::now_mom () const
468 return daddy_context_->now_mom ();
472 Context::print_smob (SCM s, SCM port, scm_print_state *)
474 Context *sc = (Context *) SCM_CELL_WORD_1 (s);
476 scm_puts ("#<", port);
477 scm_puts (classname (sc), port);
478 if (Context_def *d = unsmob_context_def (sc->definition_))
480 scm_puts (" ", port);
481 scm_display (d->get_context_name (), port);
484 if (Context *td = dynamic_cast<Context *> (sc))
486 scm_puts ("=", port);
487 scm_puts (td->id_string_.to_str0 (), port);
490 scm_puts (" ", port);
492 scm_display (sc->context_list_, port);
493 scm_puts (" >", port);
499 Context::mark_smob (SCM sm)
501 Context *me = (Context *) SCM_CELL_WORD_1 (sm);
502 scm_gc_mark (me->key_->self_scm ());
503 scm_gc_mark (me->context_list_);
504 scm_gc_mark (me->aliases_);
505 scm_gc_mark (me->definition_);
506 scm_gc_mark (me->properties_scm_);
507 scm_gc_mark (me->accepts_list_);
508 scm_gc_mark (me->implementation_);
510 return me->properties_scm_;
513 IMPLEMENT_SMOBS (Context);
514 IMPLEMENT_DEFAULT_EQUAL_P (Context);
515 IMPLEMENT_TYPE_P (Context, "ly:context?");
518 Context::try_music (Music *m)
520 Translator *t = implementation ();
524 bool b = t->try_music (m);
525 if (!b && daddy_context_)
526 b = daddy_context_->try_music (m);
532 Context::get_global_context () const
534 if (dynamic_cast<Global_context *> ((Context *) this))
535 return dynamic_cast<Global_context *> ((Context *) this);
538 return daddy_context_->get_global_context ();
540 programming_error ("No Global context!");
545 Context::get_parent_context () const
547 return daddy_context_;
551 Context::implementation () const
553 return dynamic_cast<Translator_group *> (unsmob_translator (implementation_));
557 Context::clear_key_disambiguations ()
559 grob_counts_.clear ();
560 context_counts_.clear ();
561 for (SCM s = context_list_; scm_is_pair (s); s = scm_cdr (s))
563 unsmob_context (scm_car (s))->clear_key_disambiguations ();