Imported Upstream version 2.14.2

[lilypond.git] / lily / engraver-scheme.cc

diff --git a/lily/engraver-scheme.cc b/lily/engraver-scheme.cc
new file mode 100644 (file)
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--- /dev/null
+++ b/lily/engraver-scheme.cc
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+/*
+  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;
+}