X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstaff-symbol-referencer.cc;h=bec8c8001f9d01ad741365808337c248a953ee94;hb=a77737811657427f9037db99ebaf091ae66d6fc9;hp=aa45e55e7a4baf8c2b6bc0936fff409b98b3236b;hpb=621e5fb6a5c3cb67c46082e561cffad691ead30c;p=lilypond.git

diff --git a/lily/staff-symbol-referencer.cc b/lily/staff-symbol-referencer.cc
index aa45e55e7a..bec8c8001f 100644
--- a/lily/staff-symbol-referencer.cc
+++ b/lily/staff-symbol-referencer.cc
@@ -1,15 +1,26 @@
 /*
-  staff-symbol-referencer.cc -- implement Staff_symbol_referencer
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1999--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 1999--2006 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 "staff-symbol-referencer.hh"
 
-
 #include "staff-symbol.hh"
+#include "grob.hh"
 #include "output-def.hh"
 #include "libc-extension.hh"
 
@@ -20,23 +31,11 @@ Staff_symbol_referencer::line_count (Grob *me)
   return st ? Staff_symbol::line_count (st) : 0;
 }
 
-bool
-Staff_symbol_referencer::on_line (Grob *me)
-{
-  return on_line (me, (int) rint (get_position (me)));
-}
-
-bool
-Staff_symbol_referencer::on_staff_line (Grob *me)
-{
-  return on_staff_line (me, (int) rint (get_position (me)));
-}
-
 bool
 Staff_symbol_referencer::on_line (Grob *me, int pos)
 {
-  int sz = line_count (me) - 1;
-  return ((pos + sz) % 2) == 0;
+  Grob *st = get_staff_symbol (me);
+  return st ? Staff_symbol::on_line (st, pos) : false;
 }
 
 bool
@@ -92,6 +91,23 @@ Staff_symbol_referencer::get_position (Grob *me)
   return robust_scm2double (me->get_property ("staff-position"), p);
 }
 
+
+Interval
+Staff_symbol_referencer::extent_in_staff (Grob *me)
+{
+  Grob *st = get_staff_symbol (me);
+  Grob *c = st ? me->common_refpoint (st, Y_AXIS) : 0;
+
+  Interval retval;
+  if (st && c)
+    {
+      retval  = me->extent (c, Y_AXIS)
+	- st->relative_coordinate (c, Y_AXIS);
+    }
+
+  return retval;
+}
+
 int
 Staff_symbol_referencer::get_rounded_position (Grob *me)
 {
@@ -163,12 +179,12 @@ position_less (Grob *const &a, Grob *const &b)
     < Staff_symbol_referencer::get_position (b);
 }
 
-ADD_INTERFACE (Staff_symbol_referencer, "staff-symbol-referencer-interface",
-	       "An object whose Y position is meant relative to a staff "
-	       "symbol. "
-	       "These usually have @code{Staff_symbol_referencer::callback} "
-	       "in their @code{Y-offset-callbacks}. ",
+ADD_INTERFACE (Staff_symbol_referencer,
+	       "An object whose Y@tie{}position is meant relative to a staff"
+	       " symbol.  These usually"
+	       " have @code{Staff_symbol_referencer::callback} in their"
+	       " @code{Y-offset-callbacks}.",
 
 	       /* properties */
-	       "staff-position");
-
+	       "staff-position "
+	       );