Completion_rest_engraver: new engraver.

[lilypond.git] / lily / staff-symbol.cc

diff --git a/lily/staff-symbol.cc b/lily/staff-symbol.cc
index 6e376434ca3a3b7412520c6591c588a344711e46..d1629dfb243fbe26d88323a052a9b9aeffd1ce3d 100644 (file)
--- a/lily/staff-symbol.cc
+++ b/lily/staff-symbol.cc
@@ -1,9 +1,20 @@
 /*
-  staff-symbol.cc -- implement Staff_symbol
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 1997--2007 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.hh"
@@ -170,8 +181,7 @@ Staff_symbol::height  (SCM smob)
 bool
 Staff_symbol::on_line (Grob *me, int pos)
 {
-  Grob *st = Staff_symbol_referencer::get_staff_symbol (me);
-  SCM line_positions = st->get_property ("line-positions");
+  SCM line_positions = me->get_property ("line-positions");
   if (scm_is_pair (line_positions))
     {
       Real min_line = HUGE_VAL;
@@ -195,7 +205,25 @@ Staff_symbol::on_line (Grob *me, int pos)
       return false;
     }
   else
-    return ((abs (pos + line_count (st)) % 2) == 1);
+    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,