/*
- translator-group.cc -- implement Translator_group
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
-
- (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>,
+ Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>,
Erik Sandberg <mandolaerik@gmail.com>
+
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "translator-group.hh"
#include "context-def.hh"
#include "context.hh"
#include "dispatcher.hh"
+#include "engraver.hh"
#include "engraver-group.hh"
#include "international.hh"
#include "main.hh"
#include "music.hh"
#include "output-def.hh"
+#include "performer.hh"
#include "performer-group.hh"
+#include "scheme-engraver.hh"
#include "scm-hash.hh"
-#include "stream-event.hh"
#include "warn.hh"
-Translator_group *
-Translator_group::get_daddy_translator () const
-{
- return context ()->get_parent_context ()->implementation ();
-}
-
void
translator_each (SCM list, Translator_method method)
{
if (context_)
{
programming_error ("translator group is already connected to context "
- + context_->context_name ());
+ + context_->context_name ());
}
context_ = c;
- c->event_source ()->add_listener (GET_LISTENER (eat_event),
- ly_symbol2scm ("OldMusicEvent"));
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->disconnect_from_context (context_);
}
- context_->event_source ()->remove_listener (GET_LISTENER (eat_event),
- ly_symbol2scm ("OldMusicEvent"));
context_->event_source ()->remove_listener (GET_LISTENER (create_child_translator),
ly_symbol2scm ("AnnounceNewContext"));
context_ = 0;
{
}
-bool
-translator_accepts_any_of (Translator *tr, SCM ifaces)
-{
- 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
-find_accept_translators (SCM gravlist, SCM ifaces)
-{
- SCM l = SCM_EOL;
- for (SCM s = gravlist; scm_is_pair (s); s = scm_cdr (s))
- {
- Translator *tr = unsmob_translator (scm_car (s));
- if (translator_accepts_any_of (tr, ifaces))
- l = scm_cons (tr->self_scm (), l);
- }
- l = scm_reverse_x (l, SCM_EOL);
+/*
+ Both filter_performers and filter_engravers used to use a direct dynamic_cast
+ on the unsmobbed translator to be filtered, i.e.,
- return l;
-}
+ if (dynamic_cast<Performer *> (unsmob_translator (scm_car (*tail))))
+ but this caused mysterious optimisation issues in several GUB builds. See
+ issue #818 for the background to this change.
+*/
SCM
filter_performers (SCM ell)
{
SCM *tail = ℓ
for (SCM p = ell; scm_is_pair (p); p = scm_cdr (p))
{
- if (dynamic_cast<Performer *> (unsmob_translator (scm_car (*tail))))
+ if (unsmob_performer (scm_car (*tail)))
*tail = scm_cdr (*tail);
else
tail = SCM_CDRLOC (*tail);
SCM *tail = ℓ
for (SCM p = ell; scm_is_pair (p); p = scm_cdr (p))
{
- if (dynamic_cast<Engraver *> (unsmob_translator (scm_car (*tail))))
+ if (unsmob_engraver (scm_car (*tail)))
*tail = scm_cdr (*tail);
else
tail = SCM_CDRLOC (*tail);
for (SCM s = trans_names; scm_is_pair (s); s = scm_cdr (s))
{
- Translator *type = get_translator (scm_car (s));
+ SCM definition = scm_car (s);
+ bool is_scheme = false;
+
+ Translator *type = 0;
+ if (ly_is_symbol (definition))
+ type = get_translator (definition);
+ else if (ly_is_pair (definition))
+ {
+ type = get_translator (ly_symbol2scm ("Scheme_engraver"));
+ is_scheme = true;
+ }
+ else if (ly_is_procedure (definition))
+ {
+ // `definition' is a procedure, which takes the context as
+ // an argument and evaluates to an a-list scheme engraver
+ // definition.
+ definition = scm_call_1 (definition, cs);
+ type = get_translator (ly_symbol2scm ("Scheme_engraver"));
+ is_scheme = true;
+ }
+
if (!type)
- warning (_f ("can't find: `%s'", ly_symbol2string (scm_car (s)).c_str ()));
+ warning (_f ("cannot find: `%s'", ly_symbol2string (scm_car (s)).c_str ()));
else
{
- Translator *tr = type->clone ();
- SCM str = tr->self_scm ();
+ Translator *instance = type->clone ();
+ if (is_scheme)
+ dynamic_cast<Scheme_engraver *> (instance)->init_from_scheme (definition);
- if (tr->must_be_last ())
+ SCM str = instance->self_scm ();
+
+ if (instance->must_be_last ())
{
SCM cons = scm_cons (str, SCM_EOL);
if (scm_is_pair (trans_list))
else
trans_list = scm_cons (str, trans_list);
- tr->daddy_context_ = new_context;
- tr->unprotect ();
+ instance->daddy_context_ = new_context;
+ instance->unprotect ();
}
}
/* Filter unwanted translator types. Required to make
- \with {\consists "..."} work. */
+ \with { \consists "..." } work. */
if (dynamic_cast<Engraver_group *> (g))
g->simple_trans_list_ = filter_performers (trans_list);
else if (dynamic_cast<Performer_group *> (g))
DOWN);
}
-IMPLEMENT_LISTENER (Translator_group, eat_event);
-void
-Translator_group::eat_event (SCM sev)
-{
- Stream_event *ev = unsmob_stream_event (sev);
- SCM sm = ev->get_property ("music");
- Music *m = unsmob_music (sm);
- try_music (m);
-}
-
-bool
-Translator_group::try_music (Music *m)
-{
- SCM name = scm_sloppy_assq (ly_symbol2scm ("name"),
- m->get_property_alist (false));
-
- if (!scm_is_pair (name))
- return false;
-
- 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);
- }
-
- 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);
- // 'junking event' warning is temporarily disabled during translator cleanup
- /*
- else
- // We have tried all possible contexts. Give up.
- m->origin ()->warning (_f ("junking event: `%s'", m->name ()));
- */
- return false;
-}
-
SCM
Translator_group::get_simple_trans_list ()
{
Translator_group *tg
= dynamic_cast<Translator_group *> (c->implementation ());
- if (dir == DOWN)
+ if (tg && dir == DOWN)
{
tg->precomputed_translator_foreach (idx);
tg->call_precomputed_self_method (idx);
s = scm_cdr (s))
precomputed_recurse_over_translators (unsmob_context (scm_car (s)), idx, dir);
- if (dir == UP)
+ if (tg && dir == UP)
{
tg->precomputed_translator_foreach (idx);
tg->call_precomputed_self_method (idx);
}
void
-recurse_over_translators (Context *c, Translator_method ptr, Translator_group_method tg_ptr, Direction dir)
+recurse_over_translators (Context *c, Translator_method ptr,
+ Translator_group_method tg_ptr, Direction dir)
{
Translator_group *tg
= dynamic_cast<Translator_group *> (c->implementation ());
- if (dir == DOWN)
+ if (tg && dir == DOWN)
{
(tg->*tg_ptr) ();
translator_each (tg->get_simple_trans_list (), ptr);
s = scm_cdr (s))
recurse_over_translators (unsmob_context (scm_car (s)), ptr, tg_ptr, dir);
- if (dir == UP)
+ if (tg && dir == UP)
{
translator_each (tg->get_simple_trans_list (),
ptr);
Translator_group::Translator_group ()
{
simple_trans_list_ = SCM_EOL;
- accept_hash_table_ = SCM_EOL;
protected_events_ = 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->accept_hash_table_);
scm_gc_mark (me->protected_events_);
return me->simple_trans_list_;
}
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