X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fbox.cc;h=68d53b39f69b73e2cf5c783ea96795c552ee3e47;hb=9e781b7dc83b60a543ce218aa1a5f139f74c760f;hp=bc0a975ed0d3d91b0be837f5810af3fb8b991795;hpb=2f7fe0c6bc80ad57ae73e213f9b20bc9719ba2ce;p=lilypond.git

diff --git a/lily/box.cc b/lily/box.cc
index bc0a975ed0..68d53b39f6 100644
--- a/lily/box.cc
+++ b/lily/box.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1996--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1996--2014 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
@@ -23,7 +23,8 @@ void
 Box::translate (Offset o)
 {
   for (Axis i = X_AXIS; i < NO_AXES; incr (i))
-    interval_a_[i] += o[i];
+    if (!is_empty (i))
+      interval_a_[i] += o[i];
 }
 
 void
@@ -54,8 +55,16 @@ Box::set_empty ()
 bool
 Box::is_empty () const
 {
-  return interval_a_[X_AXIS].is_empty ()
-         || interval_a_[Y_AXIS].is_empty ();
+  return is_empty (X_AXIS) && is_empty (Y_AXIS);
+}
+
+bool
+Box::is_empty (Axis a) const
+{
+  Interval empty;
+  empty.set_empty ();
+  return interval_a_[a][LEFT] == empty[LEFT]
+    && interval_a_[a][RIGHT] == empty[RIGHT];
 }
 
 Box::Box (Interval ix, Interval iy)