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 "international.hh"
18 #include "output-def.hh"
19 #include "scm-hash.hh"
20 #include "stream-event.hh"
24 Translator_group::get_daddy_translator () const
26 return context ()->get_parent_context ()->implementation ();
30 translator_each (SCM list, Translator_method method)
32 for (SCM p = list; scm_is_pair (p); p = scm_cdr (p))
33 (unsmob_translator (scm_car (p))->*method) ();
37 Translator_group::initialize ()
39 precompute_method_bindings ();
43 Translator_group::connect_to_context (Context *c)
46 programming_error ("already connected to a context");
48 c->event_source ()->add_listener (GET_LISTENER (eat_event), ly_symbol2scm ("MusicEvent"));
52 Translator_group::finalize ()
57 translator_accepts_any_of (Translator *tr, SCM ifaces)
59 SCM ack_ifs = scm_assoc (ly_symbol2scm ("events-accepted"),
60 tr->translator_description ());
61 ack_ifs = scm_cdr (ack_ifs);
62 for (SCM s = ifaces; scm_is_pair (s); s = scm_cdr (s))
63 if (scm_c_memq (scm_car (s), ack_ifs) != SCM_BOOL_F)
69 find_accept_translators (SCM gravlist, SCM ifaces)
72 for (SCM s = gravlist; scm_is_pair (s); s = scm_cdr (s))
74 Translator *tr = unsmob_translator (scm_car (s));
75 if (translator_accepts_any_of (tr, ifaces))
76 l = scm_cons (tr->self_scm (), l);
78 l = scm_reverse_x (l, SCM_EOL);
83 IMPLEMENT_LISTENER (Translator_group, eat_event);
85 Translator_group::eat_event (SCM sev)
87 Stream_event *ev = unsmob_stream_event (sev);
88 SCM sm = ev->get_property ("music");
89 Music *m = unsmob_music (sm);
94 Translator_group::try_music (Music *m)
96 SCM name = scm_sloppy_assq (ly_symbol2scm ("name"),
97 m->get_property_alist (false));
99 if (!scm_is_pair (name))
102 name = scm_cdr (name);
103 SCM accept_list = scm_hashq_ref (accept_hash_table_, name, SCM_UNDEFINED);
104 if (accept_list == SCM_BOOL_F)
106 accept_list = find_accept_translators (get_simple_trans_list (),
107 m->get_property ("types"));
108 scm_hashq_set_x (accept_hash_table_, name, accept_list);
111 for (SCM p = accept_list; scm_is_pair (p); p = scm_cdr (p))
113 Translator *t = unsmob_translator (scm_car (p));
114 if (t && t->try_music (m))
118 // We couldn't swallow the event in this context. Try parent.
119 Context *p = context ()->get_parent_context ();
120 // Global context's translator group is a dummy, so don't try it.
121 if (p->get_parent_context())
122 // ES todo: Make Translators listeners directly instead.
123 return p->implementation ()->try_music (m);
125 // We have tried all possible contexts. Give up.
126 m->origin ()->warning (_f ("junking event: `%s'", m->name ()));
131 Translator_group::get_simple_trans_list ()
133 return simple_trans_list_;
137 precomputed_recurse_over_translators (Context *c, Translator_precompute_index idx, Direction dir)
140 = dynamic_cast<Translator_group *> (c->implementation ());
144 tg->precomputed_translator_foreach (idx);
145 tg->call_precomputed_self_method (idx);
148 for (SCM s = c->children_contexts (); scm_is_pair (s);
150 precomputed_recurse_over_translators (unsmob_context (scm_car (s)), idx, dir);
154 tg->precomputed_translator_foreach (idx);
155 tg->call_precomputed_self_method (idx);
160 recurse_over_translators (Context *c, Translator_method ptr, Translator_group_method tg_ptr, Direction dir)
163 = dynamic_cast<Translator_group *> (c->implementation ());
168 translator_each (tg->get_simple_trans_list (), ptr);
171 for (SCM s = c->children_contexts (); scm_is_pair (s);
173 recurse_over_translators (unsmob_context (scm_car (s)), ptr, tg_ptr, dir);
177 translator_each (tg->get_simple_trans_list (),
184 Translator_group::Translator_group ()
186 simple_trans_list_ = SCM_EOL;
187 accept_hash_table_ = SCM_EOL;
191 accept_hash_table_ = scm_c_make_hash_table (19);
195 Translator_group::derived_mark () const
200 Translator_group::precompute_method_bindings ()
202 for (SCM s = simple_trans_list_; scm_is_pair (s); s = scm_cdr (s))
204 Translator *tr = unsmob_translator (scm_car (s));
205 Translator_void_method_ptr ptrs[TRANSLATOR_METHOD_PRECOMPUTE_COUNT];
206 tr->fetch_precomputable_methods (ptrs);
209 for (int i = 0; i < TRANSLATOR_METHOD_PRECOMPUTE_COUNT; i++)
212 precomputed_method_bindings_[i].push_back (Translator_method_binding (tr, ptrs[i]));
216 fetch_precomputable_methods (precomputed_self_method_bindings_);
220 Translator_group::precomputed_translator_foreach (Translator_precompute_index idx)
222 vector<Translator_method_binding> &bindings (precomputed_method_bindings_[idx]);
223 for (vsize i = 0; i < bindings.size (); i++)
224 bindings[i].invoke ();
228 Translator_group::fetch_precomputable_methods (Translator_group_void_method ptrs[])
230 for (int i = 0; i < TRANSLATOR_METHOD_PRECOMPUTE_COUNT; i++)
235 Translator_group::call_precomputed_self_method (Translator_precompute_index idx)
237 if (precomputed_self_method_bindings_[idx])
238 (*precomputed_self_method_bindings_[idx]) (this);
241 Translator_group::~Translator_group ()
245 #include "ly-smobs.icc"
247 IMPLEMENT_SMOBS (Translator_group);
248 IMPLEMENT_DEFAULT_EQUAL_P (Translator_group);
249 IMPLEMENT_TYPE_P (Translator_group, "ly:translator-group?");
252 Translator_group::print_smob (SCM s, SCM port, scm_print_state *)
254 Translator_group *me = (Translator_group *) SCM_CELL_WORD_1 (s);
255 scm_puts ("#<Translator_group ", port);
256 scm_puts (me->class_name (), port);
257 scm_display (me->simple_trans_list_, port);
258 scm_puts (" >", port);
263 Translator_group::mark_smob (SCM smob)
265 Translator_group *me = (Translator_group *)SCM_CELL_WORD_1 (smob);
268 scm_gc_mark (me->accept_hash_table_);
269 return me->simple_trans_list_;