2 translator-group.cc -- implement Translator_group
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>,
7 Erik Sandberg <mandolaerik@gmail.com>
10 #include "translator-group.hh"
12 #include "context-def.hh"
14 #include "dispatcher.hh"
15 #include "engraver-group.hh"
16 #include "international.hh"
19 #include "output-def.hh"
20 #include "performer-group.hh"
21 #include "scm-hash.hh"
22 #include "stream-event.hh"
26 Translator_group::get_daddy_translator () const
28 return context ()->get_parent_context ()->implementation ();
32 translator_each (SCM list, Translator_method method)
34 for (SCM p = list; scm_is_pair (p); p = scm_cdr (p))
35 (unsmob_translator (scm_car (p))->*method) ();
39 Translator_group::initialize ()
41 precompute_method_bindings ();
45 Translator_group::connect_to_context (Context *c)
48 programming_error ("translator group is already connected to a context");
50 c->event_source ()->add_listener (GET_LISTENER (eat_event),
51 ly_symbol2scm ("MusicEvent"));
52 c->event_source ()->add_listener (GET_LISTENER (create_child_translator),
53 ly_symbol2scm ("AnnounceNewContext"));
57 Translator_group::disconnect_from_context ()
59 context_->event_source ()->remove_listener (GET_LISTENER (eat_event),
60 ly_symbol2scm ("MusicEvent"));
61 context_->event_source ()->remove_listener (GET_LISTENER (create_child_translator),
62 ly_symbol2scm ("AnnounceNewContext"));
67 Translator_group::finalize ()
72 translator_accepts_any_of (Translator *tr, SCM ifaces)
74 SCM ack_ifs = scm_assoc (ly_symbol2scm ("events-accepted"),
75 tr->translator_description ());
76 ack_ifs = scm_cdr (ack_ifs);
77 for (SCM s = ifaces; scm_is_pair (s); s = scm_cdr (s))
78 if (scm_c_memq (scm_car (s), ack_ifs) != SCM_BOOL_F)
84 find_accept_translators (SCM gravlist, SCM ifaces)
87 for (SCM s = gravlist; scm_is_pair (s); s = scm_cdr (s))
89 Translator *tr = unsmob_translator (scm_car (s));
90 if (translator_accepts_any_of (tr, ifaces))
91 l = scm_cons (tr->self_scm (), l);
93 l = scm_reverse_x (l, SCM_EOL);
99 filter_performers (SCM ell)
102 for (SCM p = ell; scm_is_pair (p); p = scm_cdr (p))
104 if (dynamic_cast<Performer *> (unsmob_translator (scm_car (*tail))))
105 *tail = scm_cdr (*tail);
107 tail = SCM_CDRLOC (*tail);
113 filter_engravers (SCM ell)
116 for (SCM p = ell; scm_is_pair (p); p = scm_cdr (p))
118 if (dynamic_cast<Engraver *> (unsmob_translator (scm_car (*tail))))
119 *tail = scm_cdr (*tail);
121 tail = SCM_CDRLOC (*tail);
127 Create a new translator for a newly created child context. Triggered
128 by AnnounceNewContext events.
130 IMPLEMENT_LISTENER (Translator_group, create_child_translator);
132 Translator_group::create_child_translator (SCM sev)
134 Stream_event *ev = unsmob_stream_event (sev);
135 // get from AnnounceNewContext
136 SCM cs = ev->get_property ("context");
137 Context *new_context = unsmob_context (cs);
138 Context_def *def = unsmob_context_def (new_context->get_definition ());
139 SCM ops = new_context->get_definition_mods ();
141 SCM trans_names = def->get_translator_names (ops);
143 Translator_group *g = get_translator_group (def->get_translator_group_type ());
144 SCM trans_list = SCM_EOL;
146 for (SCM s = trans_names; scm_is_pair (s); s = scm_cdr (s))
148 Translator *type = get_translator (scm_car (s));
150 warning (_f ("can't find: `%s'", ly_symbol2string (scm_car (s)).c_str ()));
153 Translator *tr = type->clone ();
154 SCM str = tr->self_scm ();
156 if (tr->must_be_last ())
158 SCM cons = scm_cons (str, SCM_EOL);
159 if (scm_is_pair (trans_list))
160 scm_set_cdr_x (scm_last_pair (trans_list), cons);
165 trans_list = scm_cons (str, trans_list);
167 tr->daddy_context_ = new_context;
172 g->simple_trans_list_ = trans_list;
174 /* Filter unwanted translator types. Required to make
175 \with {\consists "..."} work. */
176 if (dynamic_cast<Engraver_group *> (g))
177 g->simple_trans_list_ = filter_performers (g->simple_trans_list_);
178 else if (dynamic_cast<Performer_group *> (g))
179 g->simple_trans_list_ = filter_engravers (g->simple_trans_list_);
181 // TODO: scrap Context::implementation
182 new_context->implementation_ = g;
184 g->connect_to_context (new_context);
187 recurse_over_translators (new_context,
188 &Translator::initialize,
189 &Translator_group::initialize,
193 IMPLEMENT_LISTENER (Translator_group, eat_event);
195 Translator_group::eat_event (SCM sev)
197 Stream_event *ev = unsmob_stream_event (sev);
198 SCM sm = ev->get_property ("music");
199 Music *m = unsmob_music (sm);
204 Translator_group::try_music (Music *m)
206 SCM name = scm_sloppy_assq (ly_symbol2scm ("name"),
207 m->get_property_alist (false));
209 if (!scm_is_pair (name))
212 name = scm_cdr (name);
213 SCM accept_list = scm_hashq_ref (accept_hash_table_, name, SCM_UNDEFINED);
214 if (accept_list == SCM_BOOL_F)
216 accept_list = find_accept_translators (get_simple_trans_list (),
217 m->get_property ("types"));
218 scm_hashq_set_x (accept_hash_table_, name, accept_list);
221 for (SCM p = accept_list; scm_is_pair (p); p = scm_cdr (p))
223 Translator *t = unsmob_translator (scm_car (p));
224 if (t && t->try_music (m))
228 // We couldn't swallow the event in this context. Try parent.
229 Context *p = context ()->get_parent_context ();
230 // Global context's translator group is a dummy, so don't try it.
231 if (p->get_parent_context())
232 // ES todo: Make Translators listeners directly instead.
233 return p->implementation ()->try_music (m);
235 // We have tried all possible contexts. Give up.
236 m->origin ()->warning (_f ("junking event: `%s'", m->name ()));
241 Translator_group::get_simple_trans_list ()
243 return simple_trans_list_;
247 precomputed_recurse_over_translators (Context *c, Translator_precompute_index idx, Direction dir)
250 = dynamic_cast<Translator_group *> (c->implementation ());
254 tg->precomputed_translator_foreach (idx);
255 tg->call_precomputed_self_method (idx);
258 for (SCM s = c->children_contexts (); scm_is_pair (s);
260 precomputed_recurse_over_translators (unsmob_context (scm_car (s)), idx, dir);
264 tg->precomputed_translator_foreach (idx);
265 tg->call_precomputed_self_method (idx);
270 recurse_over_translators (Context *c, Translator_method ptr, Translator_group_method tg_ptr, Direction dir)
273 = dynamic_cast<Translator_group *> (c->implementation ());
278 translator_each (tg->get_simple_trans_list (), ptr);
281 for (SCM s = c->children_contexts (); scm_is_pair (s);
283 recurse_over_translators (unsmob_context (scm_car (s)), ptr, tg_ptr, dir);
287 translator_each (tg->get_simple_trans_list (),
294 Translator_group::Translator_group ()
296 simple_trans_list_ = SCM_EOL;
297 accept_hash_table_ = SCM_EOL;
301 accept_hash_table_ = scm_c_make_hash_table (19);
305 Translator_group::derived_mark () const
310 Translator_group::precompute_method_bindings ()
312 for (SCM s = simple_trans_list_; scm_is_pair (s); s = scm_cdr (s))
314 Translator *tr = unsmob_translator (scm_car (s));
315 Translator_void_method_ptr ptrs[TRANSLATOR_METHOD_PRECOMPUTE_COUNT];
316 tr->fetch_precomputable_methods (ptrs);
319 for (int i = 0; i < TRANSLATOR_METHOD_PRECOMPUTE_COUNT; i++)
322 precomputed_method_bindings_[i].push_back (Translator_method_binding (tr, ptrs[i]));
326 fetch_precomputable_methods (precomputed_self_method_bindings_);
330 Translator_group::precomputed_translator_foreach (Translator_precompute_index idx)
332 vector<Translator_method_binding> &bindings (precomputed_method_bindings_[idx]);
333 for (vsize i = 0; i < bindings.size (); i++)
334 bindings[i].invoke ();
338 Translator_group::fetch_precomputable_methods (Translator_group_void_method ptrs[])
340 for (int i = 0; i < TRANSLATOR_METHOD_PRECOMPUTE_COUNT; i++)
345 Translator_group::call_precomputed_self_method (Translator_precompute_index idx)
347 if (precomputed_self_method_bindings_[idx])
348 (*precomputed_self_method_bindings_[idx]) (this);
351 Translator_group::~Translator_group ()
355 #include "ly-smobs.icc"
357 IMPLEMENT_SMOBS (Translator_group);
358 IMPLEMENT_DEFAULT_EQUAL_P (Translator_group);
359 IMPLEMENT_TYPE_P (Translator_group, "ly:translator-group?");
362 Translator_group::print_smob (SCM s, SCM port, scm_print_state *)
364 Translator_group *me = (Translator_group *) SCM_CELL_WORD_1 (s);
365 scm_puts ("#<Translator_group ", port);
366 scm_puts (me->class_name (), port);
367 scm_display (me->simple_trans_list_, port);
368 scm_puts (" >", port);
373 Translator_group::mark_smob (SCM smob)
375 Translator_group *me = (Translator_group *)SCM_CELL_WORD_1 (smob);
378 scm_gc_mark (me->accept_hash_table_);
379 return me->simple_trans_list_;