X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fengraver-scheme.cc;fp=lily%2Fengraver-scheme.cc;h=fa71a1444b217df1a4b7fcf80c3a82bede4758ed;hb=941dff9d2a67080e0dd8474f1e70f0c72ace6424;hp=0000000000000000000000000000000000000000;hpb=5a22d6233a39d3164e1ca043244794c268be4ad0;p=lilypond.git

diff --git a/lily/engraver-scheme.cc b/lily/engraver-scheme.cc
new file mode 100644
index 0000000000..fa71a1444b
--- /dev/null
+++ b/lily/engraver-scheme.cc
@@ -0,0 +1,56 @@
+/*
+  This file is part of LilyPond, the GNU music typesetter.
+
+  Copyright (C) 1997--2011 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 "engraver.hh"
+#include "grob.hh"
+
+LY_DEFINE (ly_engraver_make_grob, "ly:engraver-make-grob",
+	   3, 0, 0, (SCM engraver, SCM grob_name, SCM cause),
+	   "Create a grob originating from given @var{engraver} instance,"
+	   " with given @var{grob-name}, a symbol."
+	   "  @var{cause} should either be another grob"
+	   " or a music event.")
+{
+  LY_ASSERT_TYPE (unsmob_engraver, engraver, 1);
+  LY_ASSERT_TYPE (ly_is_symbol, grob_name, 2);
+  LY_ASSERT_TYPE (ly_is_grob_cause, cause, 3);
+
+  Grob *g = unsmob_engraver (engraver)->
+    internal_make_grob(grob_name, cause,
+		       ly_symbol2string (grob_name).c_str (),
+		       "scheme", 0, "scheme");
+  return g->self_scm ();
+}
+
+LY_DEFINE (ly_engraver_announce_end_grob, "ly:engraver-announce-end-grob",
+	   3, 0, 0, (SCM engraver, SCM grob, SCM cause),
+	   "Announce the end of a grob (i.e., the end of a spanner)"
+	   " originating from given @var{engraver} instance, with"
+	   " @var{grob} being a grob.  @var{cause} should either"
+	   " be another grob or a music event.")
+{
+  LY_ASSERT_TYPE (unsmob_engraver, engraver, 1);
+  LY_ASSERT_SMOB (Grob, grob, 2);
+  LY_ASSERT_TYPE (ly_is_grob_cause, cause, 3);
+
+  unsmob_engraver (engraver)->
+    announce_end_grob (unsmob_grob (grob), cause);
+
+  return SCM_UNSPECIFIED;
+}