/*
- translator-ctors.cc -- implement Translator construction
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.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 "context.hh"
#include "translator.hh"
+#include "lily-imports.hh"
+#include "international.hh"
#include "scm-hash.hh"
#include "warn.hh"
+#include "protected-scm.hh"
-/*
- should delete these after exit.
-*/
+SCM
+Translator_creator::call (SCM ctx)
+{
+ return (allocate_ (LY_ASSERT_SMOB (Context, ctx, 1)))->unprotect ();
+}
-Scheme_hash_table *global_translator_dict = 0;
+Protected_scm global_translator_dict;
+Protected_scm global_translator_dict_rev;
LY_DEFINE (get_all_translators, "ly:get-all-translators", 0, 0, 0, (),
- "Return a list of all translator objects that may be instantiated. ")
+ "Return a list of all translator objects that may be"
+ " instantiated.")
{
- SCM l = global_translator_dict ? global_translator_dict->to_alist () : SCM_EOL;
+ Scheme_hash_table *dict = unsmob<Scheme_hash_table> (global_translator_dict);
+ SCM l = dict ? dict->to_alist () : SCM_EOL;
for (SCM s = l; scm_is_pair (s); s = scm_cdr (s))
- {
- scm_set_car_x (s, scm_cdar (s));
- }
+ scm_set_car_x (s, scm_cdar (s));
return l;
}
void
-add_translator (Translator *t)
+add_translator_creator (SCM creator, SCM name, SCM description)
+{
+ Scheme_hash_table *dict = unsmob<Scheme_hash_table> (global_translator_dict);
+ if (!dict)
+ {
+ global_translator_dict = Scheme_hash_table::make_smob ();
+ global_translator_dict_rev =
+ scm_make_weak_key_hash_table (scm_from_int (119));
+ dict = unsmob<Scheme_hash_table> (global_translator_dict);
+ }
+ dict->set (name, creator);
+ scm_hashq_set_x (global_translator_dict_rev, creator, scm_cons (name, description));
+}
+
+LY_DEFINE (ly_translator_name, "ly:translator-name",
+ 1, 0, 0, (SCM creator),
+ "Return the type name of the translator definition @var{creator}."
+ " The name is a symbol.")
{
- if (!global_translator_dict)
- global_translator_dict = new Scheme_hash_table;
+ SCM res = global_translator_dict_rev.is_bound ()
+ ? scm_hashq_ref (global_translator_dict_rev, creator, SCM_BOOL_F)
+ : SCM_BOOL_F;
+ SCM_ASSERT_TYPE (scm_is_pair (res),
+ creator, SCM_ARG1, __FUNCTION__, "translator definition");
+ return scm_car (res);
+}
- SCM k = ly_symbol2scm (classname (t));
- global_translator_dict->set (k, t->self_scm ());
+LY_DEFINE (ly_translator_description, "ly:translator-description",
+ 1, 0, 0, (SCM creator),
+ "Return an alist of properties of translator definition @var{creator}.")
+{
+ SCM res = global_translator_dict_rev.is_bound ()
+ ? scm_hashq_ref (global_translator_dict_rev, creator, SCM_BOOL_F)
+ : SCM_BOOL_F;
+ SCM_ASSERT_TYPE (scm_is_pair (res),
+ creator, SCM_ARG1, __FUNCTION__, "translator definition");
+ return scm_cdr (res);
+}
- scm_gc_unprotect_object (t->self_scm ());
+LY_DEFINE (ly_register_translator, "ly:register-translator",
+ 2, 1, 0, (SCM creator, SCM name, SCM description),
+ "Register a translator @var{creator} (usually a descriptive"
+ " alist or a function/closure returning one when given a"
+ " context argument) with the given symbol @var{name} and"
+ " the given @var{description} alist.")
+{
+ SCM_ASSERT_TYPE (ly_is_procedure (creator) || scm_is_pair (creator),
+ creator, SCM_ARG1, __FUNCTION__, "translator creator");
+ LY_ASSERT_TYPE (ly_is_symbol, name, 2);
+ if (SCM_UNBNDP (description))
+ description = SCM_EOL;
+ else
+ LY_ASSERT_TYPE (ly_is_list, description, 3);
+ add_translator_creator (creator, name, description);
+ return SCM_UNSPECIFIED;
}
-Translator *
-get_translator (SCM sym)
+SCM
+get_translator_creator (SCM sym)
{
SCM v = SCM_BOOL_F;
- if (global_translator_dict)
- global_translator_dict->try_retrieve (sym, &v);
+ Scheme_hash_table *dict = unsmob<Scheme_hash_table> (global_translator_dict);
+ if (dict)
+ dict->try_retrieve (sym, &v);
- if (v == SCM_BOOL_F)
- error (_f ("unknown translator: `%s'", ly_symbol2string (sym).to_str0 ()));
+ if (scm_is_false (v))
+ {
+ warning (_f ("unknown translator: `%s'", ly_symbol2string (sym).c_str ()));
+ }
- return unsmob_translator (v);
+ return v;
}
-