X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fgrace-iterator.cc;h=daaaf855bf59216a1f1f90304e38fb1ca2435a09;hb=cb2895f4abe165c0022ae2519111f73a0e775c30;hp=8ef15c7cf98f0fb1c9cef0de9fd3255751404f46;hpb=634ad74db688a5305f001917453c5cd15305c539;p=lilypond.git

diff --git a/lily/grace-iterator.cc b/lily/grace-iterator.cc
index 8ef15c7cf9..daaaf855bf 100644
--- a/lily/grace-iterator.cc
+++ b/lily/grace-iterator.cc
@@ -1,21 +1,40 @@
-/*   
-  grace-music.cc -- implement Grace_music
-  
-  source file of the GNU LilyPond music typesetter
-  
-  (c) 1999--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-  
- */
+/*
+  This file is part of LilyPond, the GNU music typesetter.
+
+  Copyright (C) 1999--2015 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_;
+  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
@@ -29,10 +48,9 @@ Grace_iterator::pending_moment () const
   Moment cp = Music_wrapper_iterator::pending_moment ();
 
   Moment pending;
-  pending.grace_part_ =  start_mom_.grace_part_ + cp.main_part_;
+  pending.grace_part_ = start_mom_.grace_part_ + cp.main_part_;
 
   return pending;
 }
 
-
 IMPLEMENT_CTOR_CALLBACK (Grace_iterator);