#include "context-def.hh"
#include "context.hh"
#include "dispatcher.hh"
-#include "engraver-group.hh"
#include "international.hh"
#include "main.hh"
#include "music.hh"
#include "output-def.hh"
-#include "performer-group.hh"
#include "scm-hash.hh"
#include "stream-event.hh"
#include "warn.hh"
Translator_group::connect_to_context (Context *c)
{
if (context_)
- {
- programming_error ("translator group is already connected to context "
- + context_->context_name ());
- }
-
+ programming_error ("already connected to a context");
context_ = c;
- c->event_source ()->add_listener (GET_LISTENER (create_child_translator),
- ly_symbol2scm ("AnnounceNewContext"));
- for (SCM tr_list = simple_trans_list_; scm_is_pair (tr_list); tr_list = scm_cdr (tr_list))
- {
- Translator *tr = unsmob_translator (scm_car (tr_list));
- tr->connect_to_context (c);
- }
-}
-
-void
-Translator_group::disconnect_from_context ()
-{
- for (SCM tr_list = simple_trans_list_; scm_is_pair (tr_list); tr_list = scm_cdr (tr_list))
- {
- Translator *tr = unsmob_translator (scm_car (tr_list));
- tr->disconnect_from_context (context_);
- }
- context_->event_source ()->remove_listener (GET_LISTENER (create_child_translator),
- ly_symbol2scm ("AnnounceNewContext"));
- context_ = 0;
- protected_events_ = SCM_EOL;
+ c->event_source ()->add_listener (GET_LISTENER (eat_event), ly_symbol2scm ("MusicEvent"));
}
void
{
}
-SCM
-filter_performers (SCM ell)
+bool
+translator_accepts_any_of (Translator *tr, SCM ifaces)
{
- SCM *tail = ℓ
- for (SCM p = ell; scm_is_pair (p); p = scm_cdr (p))
- {
- if (dynamic_cast<Performer *> (unsmob_translator (scm_car (*tail))))
- *tail = scm_cdr (*tail);
- else
- tail = SCM_CDRLOC (*tail);
- }
- return ell;
+ SCM ack_ifs = scm_assoc (ly_symbol2scm ("events-accepted"),
+ tr->translator_description ());
+ ack_ifs = scm_cdr (ack_ifs);
+ for (SCM s = ifaces; scm_is_pair (s); s = scm_cdr (s))
+ if (scm_c_memq (scm_car (s), ack_ifs) != SCM_BOOL_F)
+ return true;
+ return false;
}
SCM
-filter_engravers (SCM ell)
+find_accept_translators (SCM gravlist, SCM ifaces)
{
- SCM *tail = ℓ
- for (SCM p = ell; scm_is_pair (p); p = scm_cdr (p))
+ SCM l = SCM_EOL;
+ for (SCM s = gravlist; scm_is_pair (s); s = scm_cdr (s))
{
- if (dynamic_cast<Engraver *> (unsmob_translator (scm_car (*tail))))
- *tail = scm_cdr (*tail);
- else
- tail = SCM_CDRLOC (*tail);
+ Translator *tr = unsmob_translator (scm_car (s));
+ if (translator_accepts_any_of (tr, ifaces))
+ l = scm_cons (tr->self_scm (), l);
}
- return ell;
-}
+ l = scm_reverse_x (l, SCM_EOL);
-/*
- Protects the parameter from being garbage collected. The object is
- protected until the next disconnect_from_context call.
-
- Whenever a child translator hears an event, the event is added to
- this list. This eliminates the need for derived_mark methods in most
- translators; all incoming events are instead protected by the
- translator group.
-
- TODO: Should the list also be flushed at the beginning of each new
- moment?
- */
-void
-Translator_group::protect_event (SCM ev)
-{
- protected_events_ = scm_cons (ev, protected_events_);
+ return l;
}
-/*
- Create a new translator for a newly created child context. Triggered
- by AnnounceNewContext events.
- */
-IMPLEMENT_LISTENER (Translator_group, create_child_translator);
+IMPLEMENT_LISTENER (Translator_group, eat_event);
void
-Translator_group::create_child_translator (SCM sev)
+Translator_group::eat_event (SCM sev)
{
Stream_event *ev = unsmob_stream_event (sev);
- // get from AnnounceNewContext
- SCM cs = ev->get_property ("context");
- Context *new_context = unsmob_context (cs);
- Context_def *def = unsmob_context_def (new_context->get_definition ());
- SCM ops = new_context->get_definition_mods ();
-
- SCM trans_names = def->get_translator_names (ops);
-
- Translator_group *g = get_translator_group (def->get_translator_group_type ());
- SCM trans_list = SCM_EOL;
-
- for (SCM s = trans_names; scm_is_pair (s); s = scm_cdr (s))
- {
- Translator *type = get_translator (scm_car (s));
- if (!type)
- warning (_f ("can't find: `%s'", ly_symbol2string (scm_car (s)).c_str ()));
- else
- {
- Translator *tr = type->clone ();
- SCM str = tr->self_scm ();
-
- if (tr->must_be_last ())
- {
- SCM cons = scm_cons (str, SCM_EOL);
- if (scm_is_pair (trans_list))
- scm_set_cdr_x (scm_last_pair (trans_list), cons);
- else
- trans_list = cons;
- }
- else
- trans_list = scm_cons (str, trans_list);
-
- tr->daddy_context_ = new_context;
- tr->unprotect ();
- }
- }
+ SCM sm = ev->get_property ("music");
+ Music *m = unsmob_music (sm);
+ try_music (m);
+}
- /* Filter unwanted translator types. Required to make
- \with {\consists "..."} work. */
- if (dynamic_cast<Engraver_group *> (g))
- g->simple_trans_list_ = filter_performers (trans_list);
- else if (dynamic_cast<Performer_group *> (g))
- g->simple_trans_list_ = filter_engravers (trans_list);
+bool
+Translator_group::try_music (Music *m)
+{
+ SCM name = scm_sloppy_assq (ly_symbol2scm ("name"),
+ m->get_property_alist (false));
- // TODO: scrap Context::implementation
- new_context->implementation_ = g;
+ if (!scm_is_pair (name))
+ return false;
- g->connect_to_context (new_context);
- g->unprotect ();
+ name = scm_cdr (name);
+ SCM accept_list = scm_hashq_ref (accept_hash_table_, name, SCM_UNDEFINED);
+ if (accept_list == SCM_BOOL_F)
+ {
+ accept_list = find_accept_translators (get_simple_trans_list (),
+ m->get_property ("types"));
+ scm_hashq_set_x (accept_hash_table_, name, accept_list);
+ }
- recurse_over_translators (new_context,
- &Translator::initialize,
- &Translator_group::initialize,
- DOWN);
+ for (SCM p = accept_list; scm_is_pair (p); p = scm_cdr (p))
+ {
+ Translator *t = unsmob_translator (scm_car (p));
+ if (t && t->try_music (m))
+ return true;
+ }
+
+ // We couldn't swallow the event in this context. Try parent.
+ Context *p = context ()->get_parent_context ();
+ // Global context's translator group is a dummy, so don't try it.
+ if (p->get_parent_context())
+ // ES todo: Make Translators listeners directly instead.
+ return p->implementation ()->try_music (m);
+ else
+ // We have tried all possible contexts. Give up.
+ m->origin ()->warning (_f ("junking event: `%s'", m->name ()));
+ return false;
}
SCM
Translator_group::Translator_group ()
{
simple_trans_list_ = SCM_EOL;
- protected_events_ = SCM_EOL;
+ accept_hash_table_ = SCM_EOL;
context_ = 0;
smobify_self ();
+
+ accept_hash_table_ = scm_c_make_hash_table (19);
}
void
Translator_group *me = (Translator_group *)SCM_CELL_WORD_1 (smob);
me->derived_mark ();
- scm_gc_mark (me->protected_events_);
+ scm_gc_mark (me->accept_hash_table_);
return me->simple_trans_list_;
}
projects / lilypond.git / blobdiff