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 ());
109 Context::find_create_context (SCM n, String id, 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 ()->find_create_context (n, id, operations);
118 if (Context *existing = find_context_below (this, n, id))
121 if (n == ly_symbol2scm ("Bottom"))
123 Context* tg = get_default_interpreter ();
129 TODO: use accepts_list_.
131 Link_array<Context_def> path
132 = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ());
136 Context * current = this;
138 // start at 1. The first one (index 0) will be us.
139 for (int i=0; i < path.size (); i++)
141 SCM ops = (i == path.size () -1) ? operations : SCM_EOL;
144 if (i == path.size () -1)
150 current = current->create_context (path[i],
159 Don't go up to Global_context, because global goes down to
163 if (daddy_context_ && !dynamic_cast<Global_context*> (daddy_context_))
164 ret = daddy_context_->find_create_context (n, id, operations);
167 warning (_f ("Cannot find or create `%s' called `%s'",
168 ly_symbol2string (n).to_str0 (), id));
176 Context::create_context (Context_def * cdef,
180 String type = ly_symbol2string (cdef->get_context_name());
181 Object_key const *key = get_context_key (type, id);
183 = cdef->instantiate (ops, key);
185 new_group->id_string_ = id;
186 add_context (new_group);
187 apply_property_operations (new_group, ops);
193 Context::get_context_key (String type, String id)
195 String now_key = type + "@" + id;
197 int disambiguation_count = 0;
198 if (context_counts_.find (now_key) != context_counts_.end ())
200 disambiguation_count = context_counts_[now_key];
203 context_counts_[now_key] = disambiguation_count + 1;
206 return new Lilypond_context_key (get_key (),
209 disambiguation_count);
213 Context::get_grob_key (String name)
215 int disambiguation_count = 0;
216 if (grob_counts_.find (name) != grob_counts_.end ())
218 disambiguation_count = grob_counts_[name];
220 grob_counts_[name] = disambiguation_count + 1;
222 Object_key * k = new Lilypond_grob_key (get_key(),
225 disambiguation_count);
233 Default child context as a SCM string, or something else if there is
237 Context::default_child_context_name () const
239 return scm_is_pair (accepts_list_)
240 ? scm_car (scm_last_pair (accepts_list_))
246 Context::is_bottom_context () const
248 return !scm_is_symbol (default_child_context_name ());
252 Context::get_default_interpreter ()
254 if (!is_bottom_context ())
256 SCM nm = default_child_context_name ();
257 SCM st = find_context_def (get_output_def (), nm);
259 String name = ly_symbol2string (nm);
260 Context_def *t = unsmob_context_def (st);
263 warning (_f ("can't find or create: `%s'", name.to_str0 ()));
264 t = unsmob_context_def (this->definition_);
267 Context *tg = create_context (t, "", SCM_EOL);
268 if (!tg->is_bottom_context ())
269 return tg->get_default_interpreter ();
280 Context::where_defined (SCM sym) const
282 if (properties_dict ()->contains (sym))
284 return (Context*)this;
287 return (daddy_context_) ? daddy_context_->where_defined (sym) : 0;
291 return SCM_EOL when not found.
294 Context::internal_get_property (SCM sym) const
297 if (properties_dict ()->try_retrieve (sym, &val))
301 return daddy_context_->internal_get_property (sym);
307 Context::is_alias (SCM sym) const
309 if (sym == ly_symbol2scm ("Bottom")
310 && !scm_is_pair (accepts_list_))
312 if (sym == unsmob_context_def (definition_)->get_context_name ())
315 return scm_c_memq (sym, aliases_) != SCM_BOOL_F;
319 Context::add_alias (SCM sym)
321 aliases_ = scm_cons (sym, aliases_);
327 Context::internal_set_property (SCM sym, SCM val)
330 if (internal_type_checking_global_b)
331 assert (type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")));
334 properties_dict ()->set (sym, val);
338 TODO: look up to check whether we have inherited var?
341 Context::unset_property (SCM sym)
343 properties_dict ()->remove (sym);
347 Remove a context from the hierarchy.
350 Context::remove_context (Context*trans)
354 context_list_ = scm_delq_x (trans->self_scm (), context_list_);
355 trans->daddy_context_ = 0;
360 ID == "" means accept any ID.
363 find_context_below (Context * where,
366 if (where->is_alias (type))
368 if (id == "" || where->id_string () == id)
373 for (SCM s = where->children_contexts ();
374 !found && scm_is_pair (s); s = scm_cdr (s))
376 Context *tr = unsmob_context (scm_car (s));
378 found = find_context_below (tr, type, id);
385 Context::properties_as_alist () const
387 return properties_dict ()->to_alist ();
391 Context::context_name_symbol () const
393 Context_def *td = unsmob_context_def (definition_);
394 return td->get_context_name ();
398 Context::context_name () const
400 return ly_symbol2string (context_name_symbol ());
404 Context::get_score_context () const
406 if (Score_context *sc = dynamic_cast<Score_context*> ((Context*) this))
408 else if (daddy_context_)
409 return daddy_context_->get_score_context ();
415 Context::get_output_def () const
417 return daddy_context_ ? daddy_context_->get_output_def () : 0;
426 Context::now_mom () const
428 return daddy_context_->now_mom ();
432 Context::print_smob (SCM s, SCM port, scm_print_state *)
434 Context *sc = (Context *) SCM_CELL_WORD_1 (s);
436 scm_puts ("#<", port);
437 scm_puts (classname (sc), port);
438 if (Context_def *d = unsmob_context_def (sc->definition_))
440 scm_puts (" ", port);
441 scm_display (d->get_context_name (), port);
444 if (Context *td=dynamic_cast<Context *> (sc))
446 scm_puts ("=", port);
447 scm_puts (td->id_string_.to_str0 (), port);
451 scm_puts (" ", port);
453 scm_display (sc->context_list_, port);
454 scm_puts (" >", port);
460 Context::mark_smob (SCM sm)
462 Context *me = (Context*) SCM_CELL_WORD_1 (sm);
463 scm_gc_mark (me->key_->self_scm ());
464 scm_gc_mark (me->context_list_);
465 scm_gc_mark (me->aliases_);
466 scm_gc_mark (me->definition_);
467 scm_gc_mark (me->properties_scm_);
468 scm_gc_mark (me->accepts_list_);
469 scm_gc_mark (me->implementation_);
471 return me->properties_scm_;
474 IMPLEMENT_SMOBS (Context);
475 IMPLEMENT_DEFAULT_EQUAL_P (Context);
476 IMPLEMENT_TYPE_P (Context,"ly:context?");
479 Context::try_music (Music* m)
481 Translator* t = implementation ();
485 bool b = t->try_music (m);
486 if (!b && daddy_context_)
487 b = daddy_context_->try_music (m);
494 Context::get_global_context () const
496 if (dynamic_cast<Global_context *>((Context*) this))
497 return dynamic_cast<Global_context *> ((Context*) this);
500 return daddy_context_->get_global_context ();
502 programming_error ("No Global context!");
507 Context::get_parent_context () const
509 return daddy_context_;
513 Context::implementation () const
515 return dynamic_cast<Translator_group*> (unsmob_translator (implementation_));
519 Context::clear_key_disambiguations ()
521 grob_counts_.clear();
522 context_counts_.clear();
523 for (SCM s = context_list_; scm_is_pair (s); s = scm_cdr (s))
525 unsmob_context (scm_car (s))->clear_key_disambiguations();