-/*
- translator-scheme.cc -- implement Scheme context functions
-
- source file of the GNU LilyPond music typesetter
-
- (c) 2002--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
-
-#include "translator.hh"
-#include "context-def.hh"
-
-#include "translator-group.hh"
-#include "lily-guile.hh"
-
-LY_DEFINE(ly_get_context_property,
- "ly:get-context-property", 2, 0, 0,
- (SCM context, SCM name),
- "retrieve the value of @var{name} from context @var{context}")
-{
- Translator *t = unsmob_translator (context);
- Translator_group* tr= dynamic_cast<Translator_group*> (t);
- SCM_ASSERT_TYPE(tr, context, SCM_ARG1, __FUNCTION__, "Translator group");
- SCM_ASSERT_TYPE(gh_symbol_p (name), name, SCM_ARG2, __FUNCTION__, "symbol");
-
- return tr->internal_get_property (name);
-
-}
-
-LY_DEFINE(ly_set_context_property,
- "ly:set-context-property!", 3, 0, 0,
- (SCM context, SCM name, SCM val),
- "set value of property @var{name} in context @var{context} to @var{val}.")
-{
- Translator *t = unsmob_translator (context);
- Translator_group* tr= dynamic_cast<Translator_group*> (t);
-
- SCM_ASSERT_TYPE(tr, context, SCM_ARG1, __FUNCTION__, "Context");
- SCM_ASSERT_TYPE(gh_symbol_p (name), name, SCM_ARG2, __FUNCTION__, "symbol");
-
- tr->internal_set_property (name, val);
-
- return SCM_UNSPECIFIED;
-}
-
-
-LY_DEFINE(ly_context_property_where_defined,
- "ly:context-property-where-defined", 2, 0, 0,
- (SCM context, SCM name),
- "Return the context above @var{context} where @var{name} is defined.")
-{
- Translator *t = unsmob_translator (context);
- Translator_group* tr = dynamic_cast<Translator_group*> (t);
- SCM_ASSERT_TYPE(tr, context, SCM_ARG1, __FUNCTION__, "Context");
- SCM_ASSERT_TYPE(gh_symbol_p (name), name, SCM_ARG2, __FUNCTION__, "symbol");
-
-
- tr = tr->where_defined (name);
-
- if (tr)
- return tr->self_scm();
-
- return SCM_EOL;
-}
-
-LY_DEFINE(ly_unset_context_property,
- "ly:unset-context-property", 2, 0, 0,
- (SCM context, SCM name),
- "Unset value of property @var{name} in context @var{context}.")
-{
- Translator *t = unsmob_translator (context);
- Translator_group* tr = dynamic_cast<Translator_group*> (t);
- SCM_ASSERT_TYPE(tr, context, SCM_ARG1, __FUNCTION__, "Context");
- SCM_ASSERT_TYPE(gh_symbol_p (name), name, SCM_ARG2, __FUNCTION__, "symbol");
-
- tr->unset_property (name);
-
- return SCM_UNSPECIFIED;
-}
-
-
-
-LY_DEFINE(ly_context_parent,
- "ly:context-parent", 1, 0, 0,
- (SCM context),
- "Return the parent of @var{context}, #f if none.")
-{
- Translator *t = unsmob_translator (context);
- Translator_group* tr= dynamic_cast<Translator_group*> (t);
-
- SCM_ASSERT_TYPE(tr, context, SCM_ARG1, __FUNCTION__, "Context");
-
- tr = tr->daddy_trans_ ;
- if (tr)
- return tr->self_scm();
- else
- return SCM_BOOL_F;
-}
-