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 "translator-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, SCM pre_init_ops)
91 Translator_group*tg = dynamic_cast<Translator_group*> (t);
94 trans_group_list_ = add_translator (trans_group_list_,t);
95 unsmob_translator_def (tg->definition_)->apply_default_property_operations (tg);
96 apply_property_operations (tg, pre_init_ops);
102 Translator_group::is_removable () const
104 return trans_group_list_ == SCM_EOL && ! iterator_count_;
108 Translator_group::find_existing_translator (SCM n, String id)
110 if ((is_alias (n) && (id_string_ == id || id.is_empty ())) || n == ly_symbol2scm ("Current"))
113 Translator_group* r = 0;
114 for (SCM p = trans_group_list_; !r && gh_pair_p (p); p = ly_cdr (p))
116 Translator * t = unsmob_translator (ly_car (p));
118 r = dynamic_cast<Translator_group*> (t)->find_existing_translator (n, id);
126 Translator_group::find_create_translator (SCM n, String id, SCM operations)
128 Translator_group * existing = find_existing_translator (n,id);
132 Link_array<Translator_def> path
133 = unsmob_translator_def (definition_)->path_to_acceptable_translator (n, get_output_def ());
137 Translator_group * current = this;
139 // start at 1. The first one (index 0) will be us.
140 for (int i=0; i < path.size (); i++)
142 Translator_group * new_group = path[i]->instantiate (output_def_);
145 if (i == path.size () -1)
147 new_group->id_string_ = id;
151 current->add_fresh_group_translator (new_group, ops);
158 Translator_group *ret = 0;
160 ret = daddy_trans_->find_create_translator (n, id, operations);
163 warning (_f ("can't find or create `%s' called `%s'", ly_symbol2string (n).to_str0 (), id));
170 Translator_group::try_music (Music* m)
172 bool hebbes_b = try_music_on_nongroup_children (m);
174 if (!hebbes_b && daddy_trans_)
175 hebbes_b = daddy_trans_->try_music (m);
181 Translator_group::get_depth () const
183 return (daddy_trans_) ? daddy_trans_->get_depth () + 1 : 0;
187 Translator_group::get_ancestor (int level)
189 if (!level || !daddy_trans_)
192 return daddy_trans_->get_ancestor (level-1);
196 Translator_group::terminate_translator (Translator*r)
200 Return value ignored. GC does the rest.
202 remove_translator (r);
207 Remove a translator from the hierarchy.
210 Translator_group::remove_translator (Translator*trans)
214 trans_group_list_ = scm_delq_x (trans->self_scm (), trans_group_list_);
215 trans->daddy_trans_ = 0;
220 Translator_group::is_bottom_translator_b () const
222 return !gh_symbol_p (unsmob_translator_def (definition_)->default_child_context_name ());
226 Translator_group::get_default_interpreter ()
228 if (!is_bottom_translator_b ())
230 SCM nm = unsmob_translator_def (definition_)->default_child_context_name ();
231 SCM st = get_output_def ()->find_translator (nm);
233 Translator_def *t = unsmob_translator_def (st);
236 warning (_f ("can't find or create: `%s'", ly_symbol2string (nm).to_str0 ()));
237 t = unsmob_translator_def (this->definition_);
239 Translator_group *tg = t->instantiate (output_def_);
240 add_fresh_group_translator (tg, SCM_EOL);
242 if (!tg->is_bottom_translator_b ())
243 return tg->get_default_interpreter ();
251 static_each (SCM list, Method_pointer method)
253 for (SCM p = list; gh_pair_p (p); p = ly_cdr (p))
254 (unsmob_translator (ly_car (p))->*method) ();
259 Translator_group::each (Method_pointer method)
261 static_each (simple_trans_list_, method);
262 static_each (trans_group_list_, method);
270 Translator_group::where_defined (SCM sym) const
272 if (properties_dict ()->contains (sym))
274 return (Translator_group*)this;
277 return (daddy_trans_) ? daddy_trans_->where_defined (sym) : 0;
281 return SCM_EOL when not found.
284 Translator_group::internal_get_property (SCM sym) const
287 if (properties_dict ()->try_retrieve (sym, &val))
291 return daddy_trans_->internal_get_property (sym);
297 Translator_group::internal_set_property (SCM sym, SCM val)
300 if (internal_type_checking_global_b)
301 assert (type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")));
304 properties_dict ()->set (sym, val);
308 TODO: look up to check whether we have inherited var?
311 Translator_group::unset_property (SCM sym)
313 properties_dict ()->remove (sym);
318 Push or pop (depending on value of VAL) a single entry (ELTPROP . VAL)
319 entry from a translator property list by name of PROP
322 Translator_group::execute_pushpop_property (SCM prop, SCM eltprop, SCM val)
324 if (gh_symbol_p (prop))
326 if (val != SCM_UNDEFINED)
328 SCM prev = internal_get_property (prop);
330 if (gh_pair_p (prev) || prev == SCM_EOL)
332 bool ok = type_check_assignment (eltprop, val, ly_symbol2scm ("backend-type?"));
336 prev = gh_cons (gh_cons (eltprop, val), prev);
337 internal_set_property (prop, prev);
348 SCM prev = internal_get_property (prop);
351 TODO: should have scm_equal_something () for reverting
354 SCM newprops= SCM_EOL ;
355 while (gh_pair_p (prev) && !SCM_EQ_P(ly_caar (prev), eltprop))
357 newprops = gh_cons (ly_car (prev), newprops);
358 prev = ly_cdr (prev);
361 if (gh_pair_p (prev))
363 newprops = scm_reverse_x (newprops, ly_cdr (prev));
364 internal_set_property (prop, newprops);
376 Translator_group::stop_translation_timestep ()
378 each (&Translator::stop_translation_timestep);
382 Translator_group::start_translation_timestep ()
384 each (&Translator::start_translation_timestep);
388 Translator_group::do_announces ()
390 each (&Translator::do_announces);
394 Translator_group::initialize ()
396 SCM tab = scm_make_vector (gh_int2scm (19), SCM_BOOL_F);
397 set_property ("acceptHashTable", tab);
398 each (&Translator::initialize);
402 Translator_group::finalize ()
404 each (&Translator::finalize);
409 bool translator_accepts_any_of (Translator*tr, SCM ifaces)
411 SCM ack_ifs = scm_assoc (ly_symbol2scm ("events-accepted"),
412 tr->translator_description());
413 ack_ifs = gh_cdr (ack_ifs);
414 for (SCM s = ifaces; ly_pair_p (s); s = ly_cdr (s))
415 if (scm_memq (ly_car (s), ack_ifs) != SCM_BOOL_F)
421 find_accept_translators (SCM gravlist, SCM ifaces)
424 for (SCM s = gravlist; ly_pair_p (s); s = ly_cdr (s))
426 Translator* tr = unsmob_translator (ly_car (s));
427 if (translator_accepts_any_of (tr, ifaces))
428 l = scm_cons (tr->self_scm (), l);
430 l = scm_reverse_x (l, SCM_EOL);
436 Translator_group::try_music_on_nongroup_children (Music *m )
438 SCM tab = get_property ("acceptHashTable");
439 SCM name = scm_sloppy_assq (ly_symbol2scm ("name"),
440 m->get_property_alist (false));
442 if (!gh_pair_p (name))
445 name = gh_cdr (name);
446 SCM accept_list = scm_hashq_ref (tab, name, SCM_UNDEFINED);
447 if (accept_list == SCM_BOOL_F)
449 accept_list = find_accept_translators (simple_trans_list_,
450 m->get_mus_property ("types"));
451 scm_hashq_set_x (tab, name, accept_list);
454 for (SCM p = accept_list; gh_pair_p (p); p = ly_cdr (p))
456 Translator * t = unsmob_translator (ly_car (p));
457 if (t && t->try_music (m))
464 Translator_group::properties_as_alist () const
466 return properties_dict()->to_alist();
470 Translator_group::context_name () const
472 Translator_def * td = unsmob_translator_def (definition_ );
473 return ly_symbol2string (td->get_context_name ());
477 apply_property_operations (Translator_group*tg, SCM pre_init_ops)
479 SCM correct_order = scm_reverse (pre_init_ops);
480 for (SCM s = correct_order; gh_pair_p (s); s = ly_cdr (s))
482 SCM entry = ly_car (s);
483 SCM type = ly_car (entry);
484 entry = ly_cdr (entry);
486 if (type == ly_symbol2scm ("push") || type == ly_symbol2scm ("poppush"))
488 SCM val = ly_cddr (entry);
489 val = gh_pair_p (val) ? ly_car (val) : SCM_UNDEFINED;
491 tg->execute_pushpop_property (ly_car (entry), ly_cadr (entry), val);
493 else if (type == ly_symbol2scm ("assign"))
495 tg->internal_set_property (ly_car (entry), ly_cadr (entry));