X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fgrace-iterator.cc;h=daaaf855bf59216a1f1f90304e38fb1ca2435a09;hb=47db9a3883d726ca53e2133a3b2298f78dd6a32e;hp=1974f0d801722c71bc13c0752f9ca5b08343f514;hpb=e344ae579fa1d81fc6c6f3049494697872fd39f9;p=lilypond.git

diff --git a/lily/grace-iterator.cc b/lily/grace-iterator.cc
index 1974f0d801..daaaf855bf 100644
--- a/lily/grace-iterator.cc
+++ b/lily/grace-iterator.cc
@@ -1,20 +1,40 @@
 /*
-  grace-music.cc -- implement Grace_music
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1999--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 1999--2008 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 "grace-iterator.hh"
 #include "global-context.hh"
-#include "warn.hh"
+#include "music.hh"
 
 void
 Grace_iterator::process (Moment m)
 {
   Moment main;
   main.main_part_ = -start_mom_.grace_part_ + m.grace_part_;
+
+  // GraceChange is announced in order to make the Grace_engraver able
+  // to distinguish \stemNeutral \grace { ... and \grace { \stemNeutral ...
+  if (in_grace_ != bool (m.grace_part_) && child_iter_ && child_iter_->get_outlet ())
+    {
+      send_stream_event (child_iter_->get_outlet (), "GraceChange", get_music ()->origin (), 0);
+    }
+  in_grace_ = m.grace_part_;
+
   Music_wrapper_iterator::process (main);
 
   /* We can safely do this, since \grace should always be inside