2 context.cc -- implement Context
4 source file of the GNU LilyPond music typesetter
6 (c) 2004 Han-Wen Nienhuys <hanwen@xs4all.nl>
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"
23 Context::is_removable () const
25 return context_list_ == SCM_EOL && ! iterator_count_ &&
26 !dynamic_cast<Score_context const*> (this);
30 Context::check_removal ()
32 for (SCM p = context_list_; scm_is_pair (p); p = scm_cdr (p))
34 Context *trg = unsmob_context (scm_car (p));
36 trg->check_removal ();
37 if (trg->is_removable ())
39 recurse_over_translators (trg, &Translator::finalize, UP);
45 Context::Context (Context const&)
51 Context::properties_dict () const
53 return Scheme_hash_table::unsmob (properties_scm_);
57 Context::add_context (Context *t)
59 SCM ts = t->self_scm ();
60 context_list_ = ly_append2 (context_list_,
61 scm_cons (ts, SCM_EOL));
63 t->daddy_context_ = this;
68 scm_gc_unprotect_object (ts);
69 Context_def *td = unsmob_context_def (t->definition_);
72 this can not move before add_context (), because \override
73 operations require that we are in the hierarchy.
75 td->apply_default_property_operations (t);
77 recurse_over_translators (t, &Translator::initialize, DOWN);
82 Context::get_key () const
87 Context::Context (Object_key const* key)
94 implementation_ = SCM_EOL;
95 properties_scm_ = SCM_EOL;
96 accepts_list_ = SCM_EOL;
97 context_list_ = SCM_EOL;
98 definition_ = SCM_EOL;
101 properties_scm_ = (new Scheme_hash_table)->self_scm ();
102 scm_gc_unprotect_object (properties_scm_);
103 scm_gc_unprotect_object (key_->self_scm ());
107 Context::create_unique_context (SCM n, SCM operations)
110 Don't create multiple score contexts.
112 if (dynamic_cast<Global_context*> (this)
113 && dynamic_cast<Global_context*> (this)->get_score_context ())
114 return get_score_context ()->create_unique_context (n, operations);
117 TODO: use accepts_list_.
119 Link_array<Context_def> path
120 = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ());
124 Context * current = this;
126 // start at 1. The first one (index 0) will be us.
127 for (int i=0; i < path.size (); i++)
129 SCM ops = (i == path.size () -1) ? operations : SCM_EOL;
131 current = current->create_context (path[i],
140 Don't go up to Global_context, because global goes down to
144 if (daddy_context_ && !dynamic_cast<Global_context*> (daddy_context_))
145 ret = daddy_context_->create_unique_context (n, operations);
148 warning (_f ("Cannot find or create new `%s'",
149 ly_symbol2string (n).to_str0 ()));
157 Context::find_create_context (SCM n, String id, SCM operations)
160 Don't create multiple score contexts.
162 if (dynamic_cast<Global_context*> (this)
163 && dynamic_cast<Global_context*> (this)->get_score_context ())
164 return get_score_context ()->find_create_context (n, id, operations);
166 if (Context *existing = find_context_below (this, n, id))
169 if (n == ly_symbol2scm ("Bottom"))
171 Context* tg = get_default_interpreter ();
176 TODO: use accepts_list_.
178 Link_array<Context_def> path
179 = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ());
183 Context * current = this;
185 // start at 1. The first one (index 0) will be us.
186 for (int i=0; i < path.size (); i++)
188 SCM ops = (i == path.size () -1) ? operations : SCM_EOL;
191 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));
223 Context::create_context (Context_def * cdef,
227 String type = ly_symbol2string (cdef->get_context_name());
228 Object_key const *key = get_context_key (type, id);
230 = cdef->instantiate (ops, key);
232 new_group->id_string_ = id;
233 add_context (new_group);
234 apply_property_operations (new_group, ops);
242 Context::get_context_key (String type, String id)
244 String now_key = type + "@" + id;
246 int disambiguation_count = 0;
247 if (context_counts_.find (now_key) != context_counts_.end ())
249 disambiguation_count = context_counts_[now_key];
252 context_counts_[now_key] = disambiguation_count + 1;
255 return new Lilypond_context_key (get_key (),
258 disambiguation_count);
262 Context::get_grob_key (String name)
264 int disambiguation_count = 0;
265 if (grob_counts_.find (name) != grob_counts_.end ())
267 disambiguation_count = grob_counts_[name];
269 grob_counts_[name] = disambiguation_count + 1;
271 Object_key * k = new Lilypond_grob_key (get_key(),
274 disambiguation_count);
282 Default child context as a SCM string, or something else if there is
286 Context::default_child_context_name () const
288 return scm_is_pair (accepts_list_)
289 ? scm_car (scm_last_pair (accepts_list_))
295 Context::is_bottom_context () const
297 return !scm_is_symbol (default_child_context_name ());
301 Context::get_default_interpreter ()
303 if (!is_bottom_context ())
305 SCM nm = default_child_context_name ();
306 SCM st = find_context_def (get_output_def (), nm);
308 String name = ly_symbol2string (nm);
309 Context_def *t = unsmob_context_def (st);
312 warning (_f ("can't find or create: `%s'", name.to_str0 ()));
313 t = unsmob_context_def (this->definition_);
316 Context *tg = create_context (t, "", SCM_EOL);
317 if (!tg->is_bottom_context ())
318 return tg->get_default_interpreter ();
329 Context::where_defined (SCM sym) const
331 if (properties_dict ()->contains (sym))
333 return (Context*)this;
336 return (daddy_context_) ? daddy_context_->where_defined (sym) : 0;
340 return SCM_EOL when not found.
343 Context::internal_get_property (SCM sym) const
346 if (properties_dict ()->try_retrieve (sym, &val))
350 return daddy_context_->internal_get_property (sym);
356 Context::is_alias (SCM sym) const
358 if (sym == ly_symbol2scm ("Bottom")
359 && !scm_is_pair (accepts_list_))
361 if (sym == unsmob_context_def (definition_)->get_context_name ())
364 return scm_c_memq (sym, aliases_) != SCM_BOOL_F;
368 Context::add_alias (SCM sym)
370 aliases_ = scm_cons (sym, aliases_);
376 Context::internal_set_property (SCM sym, SCM val)
379 if (internal_type_checking_global_b)
380 assert (type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")));
383 properties_dict ()->set (sym, val);
387 TODO: look up to check whether we have inherited var?
390 Context::unset_property (SCM sym)
392 properties_dict ()->remove (sym);
396 Remove a context from the hierarchy.
399 Context::remove_context (Context*trans)
403 context_list_ = scm_delq_x (trans->self_scm (), context_list_);
404 trans->daddy_context_ = 0;
409 ID == "" means accept any ID.
412 find_context_below (Context * where,
415 if (where->is_alias (type))
417 if (id == "" || where->id_string () == id)
422 for (SCM s = where->children_contexts ();
423 !found && scm_is_pair (s); s = scm_cdr (s))
425 Context *tr = unsmob_context (scm_car (s));
427 found = find_context_below (tr, type, id);
434 Context::properties_as_alist () const
436 return properties_dict ()->to_alist ();
440 Context::context_name_symbol () const
442 Context_def *td = unsmob_context_def (definition_);
443 return td->get_context_name ();
447 Context::context_name () const
449 return ly_symbol2string (context_name_symbol ());
453 Context::get_score_context () const
455 if (Score_context *sc = dynamic_cast<Score_context*> ((Context*) this))
457 else if (daddy_context_)
458 return daddy_context_->get_score_context ();
464 Context::get_output_def () const
466 return daddy_context_ ? daddy_context_->get_output_def () : 0;
475 Context::now_mom () const
477 return daddy_context_->now_mom ();
481 Context::print_smob (SCM s, SCM port, scm_print_state *)
483 Context *sc = (Context *) SCM_CELL_WORD_1 (s);
485 scm_puts ("#<", port);
486 scm_puts (classname (sc), port);
487 if (Context_def *d = unsmob_context_def (sc->definition_))
489 scm_puts (" ", port);
490 scm_display (d->get_context_name (), port);
493 if (Context *td=dynamic_cast<Context *> (sc))
495 scm_puts ("=", port);
496 scm_puts (td->id_string_.to_str0 (), port);
500 scm_puts (" ", port);
502 scm_display (sc->context_list_, port);
503 scm_puts (" >", port);
509 Context::mark_smob (SCM sm)
511 Context *me = (Context*) SCM_CELL_WORD_1 (sm);
512 scm_gc_mark (me->key_->self_scm ());
513 scm_gc_mark (me->context_list_);
514 scm_gc_mark (me->aliases_);
515 scm_gc_mark (me->definition_);
516 scm_gc_mark (me->properties_scm_);
517 scm_gc_mark (me->accepts_list_);
518 scm_gc_mark (me->implementation_);
520 return me->properties_scm_;
523 IMPLEMENT_SMOBS (Context);
524 IMPLEMENT_DEFAULT_EQUAL_P (Context);
525 IMPLEMENT_TYPE_P (Context,"ly:context?");
528 Context::try_music (Music* m)
530 Translator* t = implementation ();
534 bool b = t->try_music (m);
535 if (!b && daddy_context_)
536 b = daddy_context_->try_music (m);
543 Context::get_global_context () const
545 if (dynamic_cast<Global_context *>((Context*) this))
546 return dynamic_cast<Global_context *> ((Context*) this);
549 return daddy_context_->get_global_context ();
551 programming_error ("No Global context!");
556 Context::get_parent_context () const
558 return daddy_context_;
562 Context::implementation () const
564 return dynamic_cast<Translator_group*> (unsmob_translator (implementation_));
568 Context::clear_key_disambiguations ()
570 grob_counts_.clear();
571 context_counts_.clear();
572 for (SCM s = context_list_; scm_is_pair (s); s = scm_cdr (s))
574 unsmob_context (scm_car (s))->clear_key_disambiguations();