/*
- translator-group.cc -- implement Translator_group
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>,
+ Erik Sandberg <mandolaerik@gmail.com>
- (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ 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 "output-def.hh"
-#include "warn.hh"
-#include "scm-hash.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"
-
-Translator_group *
-Translator_group::get_daddy_translator () const
-{
- return context ()->get_parent_context ()->implementation ();
-}
+#include "output-def.hh"
+#include "performer.hh"
+#include "performer-group.hh"
+#include "scheme-engraver.hh"
+#include "scm-hash.hh"
+#include "warn.hh"
void
translator_each (SCM list, Translator_method method)
precompute_method_bindings ();
}
+void
+Translator_group::connect_to_context (Context *c)
+{
+ if (context_)
+ {
+ programming_error ("translator group is already connected to context "
+ + context_->context_name ());
+ }
+
+ 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;
+}
+
void
Translator_group::finalize ()
{
}
-bool
-translator_accepts_any_of (Translator *tr, SCM ifaces)
+/*
+ Both filter_performers and filter_engravers used to use a direct dynamic_cast
+ on the unsmobbed translator to be filtered, i.e.,
+
+ 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 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 *tail = ℓ
+ for (SCM p = ell; scm_is_pair (p); p = scm_cdr (p))
+ {
+ if (unsmob_performer (scm_car (*tail)))
+ *tail = scm_cdr (*tail);
+ else
+ tail = SCM_CDRLOC (*tail);
+ }
+ return ell;
}
SCM
-find_accept_translators (SCM gravlist, SCM ifaces)
+filter_engravers (SCM ell)
{
- SCM l = SCM_EOL;
- for (SCM s = gravlist; scm_is_pair (s); s = scm_cdr (s))
+ SCM *tail = ℓ
+ for (SCM p = ell; scm_is_pair (p); p = scm_cdr (p))
{
- Translator *tr = unsmob_translator (scm_car (s));
- if (translator_accepts_any_of (tr, ifaces))
- l = scm_cons (tr->self_scm (), l);
+ if (unsmob_engraver (scm_car (*tail)))
+ *tail = scm_cdr (*tail);
+ else
+ tail = SCM_CDRLOC (*tail);
}
- l = scm_reverse_x (l, SCM_EOL);
+ return ell;
+}
+
+/*
+ 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.
- return l;
+ 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_);
}
-bool
-Translator_group::try_music (Music *m)
+/*
+ Create a new translator for a newly created child context. Triggered
+ by AnnounceNewContext events.
+ */
+IMPLEMENT_LISTENER (Translator_group, create_child_translator);
+void
+Translator_group::create_child_translator (SCM sev)
{
- SCM name = scm_sloppy_assq (ly_symbol2scm ("name"),
- m->get_property_alist (false));
+ 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 ();
- if (!scm_is_pair (name))
- return false;
+ SCM trans_names = def->get_translator_names (ops);
- 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);
- }
+ Translator_group *g = get_translator_group (def->get_translator_group_type ());
+ SCM trans_list = SCM_EOL;
- for (SCM p = accept_list; scm_is_pair (p); p = scm_cdr (p))
+ for (SCM s = trans_names; scm_is_pair (s); s = scm_cdr (s))
{
- Translator *t = unsmob_translator (scm_car (p));
- if (t && t->try_music (m))
- return true;
+ 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 ("cannot find: `%s'", ly_symbol2string (scm_car (s)).c_str ()));
+ else
+ {
+ Translator *instance = type->clone ();
+ if (is_scheme)
+ dynamic_cast<Scheme_engraver *> (instance)->init_from_scheme (definition);
+
+ SCM str = instance->self_scm ();
+
+ if (instance->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);
+
+ instance->daddy_context_ = new_context;
+ instance->unprotect ();
+ }
}
- return false;
+
+ /* 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);
+
+ // TODO: scrap Context::implementation
+ new_context->implementation_ = g;
+
+ g->connect_to_context (new_context);
+ g->unprotect ();
+
+ recurse_over_translators (new_context,
+ &Translator::initialize,
+ &Translator_group::initialize,
+ DOWN);
}
SCM
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);
+ ptr);
(tg->*tg_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
assert (tr);
for (int i = 0; i < TRANSLATOR_METHOD_PRECOMPUTE_COUNT; i++)
- {
- if (ptrs[i])
- precomputed_method_bindings_[i].push (Translator_method_binding (tr, ptrs[i]));
- }
+ {
+ if (ptrs[i])
+ precomputed_method_bindings_[i].push_back (Translator_method_binding (tr, ptrs[i]));
+ }
}
fetch_precomputable_methods (precomputed_self_method_bindings_);
void
Translator_group::precomputed_translator_foreach (Translator_precompute_index idx)
{
- Array<Translator_method_binding> &bindings (precomputed_method_bindings_[idx]);
- for (int i = 0; i < bindings.size (); i++)
+ vector<Translator_method_binding> &bindings (precomputed_method_bindings_[idx]);
+ for (vsize i = 0; i < bindings.size (); i++)
bindings[i].invoke ();
}
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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