Fix #915 (faulty full-bar rest positioning with clef).

lily/bar-line.cc

 /*
   This file is part of LilyPond, the GNU music typesetter.
 
   Copyright (C) 1997--2010 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 "bar-line.hh"
 
 #include "all-font-metrics.hh"
 #include "font-interface.hh"
+#include "line-interface.hh"
 #include "lookup.hh"
 #include "output-def.hh"
 #include "paper-column.hh"
 #include "staff-symbol-referencer.hh"
-#include "line-interface.hh"
 
 MAKE_SCHEME_CALLBACK (Bar_line, calc_bar_extent, 1)
 SCM
 Bar_line::calc_bar_extent (SCM smob)
 {
   Grob *me = unsmob_grob (smob);
 
   SCM size = me->get_property ("bar-size");
 
   if (!scm_is_number (size)
       || !Staff_symbol_referencer::get_staff_symbol (me))
     return ly_interval2scm (Interval ());
 
   Real h = scm_to_double (size);
   return ly_interval2scm (Interval (-h/2, h/2));
 }
 
 Interval
 Bar_line::bar_y_extent (Grob *me, Grob *refpoint)
 {
   Interval iv = robust_scm2interval (me->get_property ("bar-extent"), Interval ());
 
   iv.translate (me->relative_coordinate (refpoint, Y_AXIS));
   return iv;
 }
 
+bool
+Bar_line::non_empty_barline (Grob *me)
+{
+  return has_interface (me) && !me->extent (me, X_AXIS).is_empty ();
+}
+
 MAKE_SCHEME_CALLBACK (Bar_line, print, 1);
 SCM
 Bar_line::print (SCM smob)
 {
   Grob *me = unsmob_grob (smob);
 
   SCM s = me->get_property ("glyph-name");
   SCM barsize = me->get_property ("bar-size");
 
   if (scm_is_string (s) && scm_is_number (barsize))
@@ skipping 396 matching lines @@
                "gap "
                "kern "
                "thin-kern "
                "hair-thickness "
                "thick-thickness "
                "glyph "
                "glyph-name "
                "bar-size "
                "bar-extent "
                );