Gets vertical skylines from grob stencils

lily/tuplet-engraver.cc

 /*
   This file is part of LilyPond, the GNU music typesetter.
 
   Copyright (C) 1998--2012 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.
 
@@ skipping 199 matching lines @@
       }
 }
 
 void
 Tuplet_engraver::acknowledge_script (Grob_info inf)
 {
   for (vsize j = 0; j < tuplets_.size (); j++)
     if (tuplets_[j].bracket_)
       {
         Item *i = dynamic_cast<Item *> (inf.grob ());
-        Tuplet_bracket::add_script (tuplets_[j].bracket_, i);
+        if (!i->internal_has_interface (ly_symbol2scm ("dynamic-interface")))
+          Tuplet_bracket::add_script (tuplets_[j].bracket_, i);
       }
 }
 
 void
 Tuplet_engraver::acknowledge_finger (Grob_info inf)
 {
   for (vsize j = 0; j < tuplets_.size (); j++)
     if (tuplets_[j].bracket_)
       {
         Item *i = dynamic_cast<Item *> (inf.grob ());
@@ skipping 49 matching lines @@
                 "TupletBracket "
                 "TupletNumber ",
 
                 /* read */
                 "tupletFullLength "
                 "tupletFullLengthNote ",
 
                 /* write */
                 ""
                );