2 Translator_group.cc -- implement Translator_group
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "music-output-def.hh"
10 #include "translator-group.hh"
11 #include "translator.hh"
14 #include "scm-hash.hh"
15 #include "context-def.hh"
19 Translator_group::Translator_group (Translator_group const&s)
24 Scheme_hash_table * tab = new Scheme_hash_table (*s.properties_dict ());
25 properties_scm_ = tab->self_scm ();
26 scm_gc_unprotect_object (tab->self_scm ());
30 Translator_group::properties_dict () const
32 return Scheme_hash_table::unsmob (properties_scm_);
35 Translator_group::~Translator_group ()
38 //assert (is_removable ());
42 Translator_group::Translator_group ()
45 Scheme_hash_table *tab = new Scheme_hash_table ;
46 properties_scm_ = tab->self_scm ();
48 scm_gc_unprotect_object (tab->self_scm ());
52 Translator_group::check_removal ()
55 for (SCM p = trans_group_list_; gh_pair_p (p); p = next)
59 Translator_group *trg = dynamic_cast<Translator_group*> (unsmob_translator (ly_car (p)));
61 trg->check_removal ();
62 if (trg->is_removable ())
63 terminate_translator (trg);
68 Translator_group::add_translator (SCM list, Translator *t)
71 Must append, since list ordering must be preserved.
73 list = gh_append2 (list, gh_cons (t->self_scm (), SCM_EOL));
74 t->daddy_trans_ = this;
75 t->output_def_ = output_def_;
82 Translator_group::add_used_group_translator (Translator *t)
84 trans_group_list_ = add_translator (trans_group_list_,t);
89 Translator_group::add_fresh_group_translator (Translator*t)
91 Translator_group*tg = dynamic_cast<Translator_group*> (t);
92 trans_group_list_ = add_translator (trans_group_list_,t);
93 Context_def * td = unsmob_context_def (tg->definition_);
96 this can not move before add_translator(), because \override
97 operations require that we are in the hierarchy.
99 td->apply_default_property_operations (tg);
105 Translator_group::is_removable () const
107 return trans_group_list_ == SCM_EOL && ! iterator_count_;
111 Translator_group::find_existing_translator (SCM n, String id)
113 if ((is_alias (n) && (id_string_ == id || id.is_empty ())) || n == ly_symbol2scm ("Current"))
116 Translator_group* r = 0;
117 for (SCM p = trans_group_list_; !r && gh_pair_p (p); p = ly_cdr (p))
119 Translator * t = unsmob_translator (ly_car (p));
121 r = dynamic_cast<Translator_group*> (t)->find_existing_translator (n, id); }
128 Translator_group::find_create_translator (SCM n, String id, SCM operations)
130 Translator_group * existing = find_existing_translator (n,id);
136 TODO: use accepts_list_.
138 Link_array<Context_def> path
139 = unsmob_context_def (definition_)->path_to_acceptable_translator (n, get_output_def ());
143 Translator_group * current = this;
145 // start at 1. The first one (index 0) will be us.
146 for (int i=0; i < path.size (); i++)
148 SCM ops = (i == path.size () -1) ? operations : SCM_EOL;
150 Translator_group * new_group
151 = path[i]->instantiate (output_def_, ops);
153 if (i == path.size () -1)
155 new_group->id_string_ = id;
158 current->add_fresh_group_translator (new_group);
159 apply_property_operations (new_group, ops);
167 Translator_group *ret = 0;
169 ret = daddy_trans_->find_create_translator (n, id, operations);
172 warning (_f ("Cannot find or create `%s' called `%s'",
173 ly_symbol2string (n).to_str0 (), id));
180 Translator_group::try_music (Music* m)
182 bool hebbes_b = try_music_on_nongroup_children (m);
184 if (!hebbes_b && daddy_trans_)
185 hebbes_b = daddy_trans_->try_music (m);
191 Translator_group::get_depth () const
193 return (daddy_trans_) ? daddy_trans_->get_depth () + 1 : 0;
197 Translator_group::terminate_translator (Translator*r)
201 Return value ignored. GC does the rest.
203 remove_translator (r);
208 Remove a translator from the hierarchy.
211 Translator_group::remove_translator (Translator*trans)
215 trans_group_list_ = scm_delq_x (trans->self_scm (), trans_group_list_);
216 trans->daddy_trans_ = 0;
222 Default child context as a SCM string, or something else if there is
226 default_child_context_name (Translator_group const *tg)
228 return gh_pair_p (tg->accepts_list_)
229 ? ly_car (scm_last_pair (tg->accepts_list_))
235 Translator_group::is_bottom_context () const
237 return !gh_symbol_p (default_child_context_name (this));
241 Translator_group::get_default_interpreter ()
243 if (!is_bottom_context ())
245 SCM nm = default_child_context_name (this);
246 SCM st = get_output_def ()->find_translator (nm);
248 Context_def *t = unsmob_context_def (st);
251 warning (_f ("can't find or create: `%s'", ly_symbol2string (nm).to_str0 ()));
252 t = unsmob_context_def (this->definition_);
254 Translator_group *tg = t->instantiate (output_def_, SCM_EOL);
255 add_fresh_group_translator (tg);
257 if (!tg->is_bottom_context ())
258 return tg->get_default_interpreter ();
266 static_each (SCM list, Method_pointer method)
268 for (SCM p = list; gh_pair_p (p); p = ly_cdr (p))
269 (unsmob_translator (ly_car (p))->*method) ();
274 Translator_group::each (Method_pointer method)
276 static_each (get_simple_trans_list (), method);
277 static_each (trans_group_list_, method);
285 Translator_group::where_defined (SCM sym) const
287 if (properties_dict ()->contains (sym))
289 return (Translator_group*)this;
292 return (daddy_trans_) ? daddy_trans_->where_defined (sym) : 0;
296 return SCM_EOL when not found.
299 Translator_group::internal_get_property (SCM sym) const
302 if (properties_dict ()->try_retrieve (sym, &val))
306 return daddy_trans_->internal_get_property (sym);
312 Translator_group::internal_set_property (SCM sym, SCM val)
315 if (internal_type_checking_global_b)
316 assert (type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")));
319 properties_dict ()->set (sym, val);
323 TODO: look up to check whether we have inherited var?
326 Translator_group::unset_property (SCM sym)
328 properties_dict ()->remove (sym);
333 Push or pop (depending on value of VAL) a single entry (ELTPROP . VAL)
334 entry from a translator property list by name of PROP
337 Translator_group::execute_pushpop_property (SCM prop, SCM eltprop, SCM val)
339 if (gh_symbol_p (prop))
341 if (val != SCM_UNDEFINED)
343 SCM prev = internal_get_property (prop);
345 if (gh_pair_p (prev) || prev == SCM_EOL)
347 bool ok = type_check_assignment (eltprop, val, ly_symbol2scm ("backend-type?"));
351 prev = gh_cons (gh_cons (eltprop, val), prev);
352 internal_set_property (prop, prev);
363 SCM prev = internal_get_property (prop);
366 TODO: should have scm_equal_something () for reverting
369 SCM newprops= SCM_EOL ;
370 while (gh_pair_p (prev) && !SCM_EQ_P(ly_caar (prev), eltprop))
372 newprops = gh_cons (ly_car (prev), newprops);
373 prev = ly_cdr (prev);
376 if (gh_pair_p (prev))
378 newprops = scm_reverse_x (newprops, ly_cdr (prev));
379 internal_set_property (prop, newprops);
391 Translator_group::stop_translation_timestep ()
393 each (&Translator::stop_translation_timestep);
397 Translator_group::start_translation_timestep ()
399 each (&Translator::start_translation_timestep);
403 Translator_group::do_announces ()
405 each (&Translator::do_announces);
409 Translator_group::initialize ()
411 SCM tab = scm_make_vector (gh_int2scm (19), SCM_BOOL_F);
412 set_property ("acceptHashTable", tab);
413 each (&Translator::initialize);
417 Translator_group::finalize ()
419 each (&Translator::finalize);
423 translator_accepts_any_of (Translator*tr, SCM ifaces)
425 SCM ack_ifs = scm_assoc (ly_symbol2scm ("events-accepted"),
426 tr->translator_description());
427 ack_ifs = gh_cdr (ack_ifs);
428 for (SCM s = ifaces; ly_pair_p (s); s = ly_cdr (s))
429 if (scm_memq (ly_car (s), ack_ifs) != SCM_BOOL_F)
435 find_accept_translators (SCM gravlist, SCM ifaces)
438 for (SCM s = gravlist; ly_pair_p (s); s = ly_cdr (s))
440 Translator* tr = unsmob_translator (ly_car (s));
441 if (translator_accepts_any_of (tr, ifaces))
442 l = scm_cons (tr->self_scm (), l);
444 l = scm_reverse_x (l, SCM_EOL);
450 Translator_group::try_music_on_nongroup_children (Music *m )
452 SCM tab = get_property ("acceptHashTable");
453 SCM name = scm_sloppy_assq (ly_symbol2scm ("name"),
454 m->get_property_alist (false));
456 if (!gh_pair_p (name))
459 name = gh_cdr (name);
460 SCM accept_list = scm_hashq_ref (tab, name, SCM_UNDEFINED);
461 if (accept_list == SCM_BOOL_F)
463 accept_list = find_accept_translators (get_simple_trans_list (),
464 m->get_mus_property ("types"));
465 scm_hashq_set_x (tab, name, accept_list);
468 for (SCM p = accept_list; gh_pair_p (p); p = ly_cdr (p))
470 Translator * t = unsmob_translator (ly_car (p));
471 if (t && t->try_music (m))
478 Translator_group::properties_as_alist () const
480 return properties_dict()->to_alist();
484 Translator_group::context_name () const
486 Context_def * td = unsmob_context_def (definition_ );
487 return ly_symbol2string (td->get_context_name ());
491 PRE_INIT_OPS is in the order specified, and hence must be reversed.
494 apply_property_operations (Translator_group*tg, SCM pre_init_ops)
496 SCM correct_order = scm_reverse (pre_init_ops);
497 for (SCM s = correct_order; gh_pair_p (s); s = ly_cdr (s))
499 SCM entry = ly_car (s);
500 SCM type = ly_car (entry);
501 entry = ly_cdr (entry);
503 if (type == ly_symbol2scm ("push") || type == ly_symbol2scm ("poppush"))
505 SCM val = ly_cddr (entry);
506 val = gh_pair_p (val) ? ly_car (val) : SCM_UNDEFINED;
508 tg->execute_pushpop_property (ly_car (entry), ly_cadr (entry), val);
510 else if (type == ly_symbol2scm ("assign"))
512 tg->internal_set_property (ly_car (entry), ly_cadr (entry));
518 names_to_translators (SCM namelist, Translator_group*tg)
521 for (SCM s = namelist; gh_pair_p (s) ; s = ly_cdr (s))
523 Translator * t = get_translator (ly_car (s));
525 warning (_f ("can't find: `%s'", s));
528 Translator * tr = t->clone ();
529 SCM str = tr->self_scm ();
530 l = gh_cons (str, l);
532 tr->daddy_trans_ = tg;
533 tr->output_def_ = tg->output_def_;
535 scm_gc_unprotect_object (str);
543 Translator_group::get_simple_trans_list ()
545 return simple_trans_list_;
553 Translator_group::get_simple_trans_list ()
555 if (simple_trans_list_ != SCM_BOOL_F)
556 return simple_trans_list_;
558 Context_def * td = unsmob_context_def (definition_);
561 The following cannot work, since start_translation_timestep ()
562 triggers this code, and start_translation_timestep happens before
563 \property Voice.Voice =#'()
566 trans_names = td->get_translator_names (SCM_EOL);
568 SCM trans_names = internal_get_property (td->get_context_name ());
569 if (!gh_pair_p (trans_names))
573 simple_trans_list_ = names_to_translators (trans_names, this);
576 static_each (simple_trans_list_, &Translator::initialize);
577 return simple_trans_list_;