X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstaff-symbol.cc;h=d1629dfb243fbe26d88323a052a9b9aeffd1ce3d;hb=e3a15ec3c1951dd16f6ee71fbd79870d9e2fb3a0;hp=dc57a2320491d4b5175cd9ddd165f2d8f5ee0b28;hpb=bc95f4434f760d41191341ab4508b2064eb19025;p=lilypond.git

diff --git a/lily/staff-symbol.cc b/lily/staff-symbol.cc
index dc57a23204..d1629dfb24 100644
--- a/lily/staff-symbol.cc
+++ b/lily/staff-symbol.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1997--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1997--2011 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
@@ -208,6 +208,24 @@ Staff_symbol::on_line (Grob *me, int pos)
     return ((abs (pos + line_count (me)) % 2) == 1);
 }
 
+Interval
+Staff_symbol::line_span (Grob *me)
+{
+  SCM line_positions = me->get_property ("line-positions");
+  Interval iv;
+
+  if (scm_is_pair (line_positions))
+    for (SCM s = line_positions; scm_is_pair (s); s = scm_cdr (s))
+      iv.add_point (scm_to_double (scm_car (s)));
+  else
+    {
+      int count = line_count (me);
+      return Interval (-count + 1, count - 1);
+    }
+
+  return iv;
+}
+
 ADD_INTERFACE (Staff_symbol,
 	       "This spanner draws the lines of a staff.  A staff symbol"
 	       " defines a vertical unit, the @emph{staff space}.  Quantities"