X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fledger-line-spanner.cc;h=e275ba68251b7527924c3e96b3bf5cdfd5c15e35;hb=a97db4ced6286c02dd269c6e985c412fe2c86cb1;hp=907c95985f7f015c331ada15718d21f5fb771c4c;hpb=586d833b4fb7a336524eb0929d693095a802fa26;p=lilypond.git

diff --git a/lily/ledger-line-spanner.cc b/lily/ledger-line-spanner.cc
index 907c95985f..e275ba6825 100644
--- a/lily/ledger-line-spanner.cc
+++ b/lily/ledger-line-spanner.cc
@@ -1,15 +1,25 @@
 /*
-  ledger-line-spanner.cc -- implement Ledger_line_spanner
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2004--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 2004--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 <map>
 using namespace std;
 
-#include "item.hh"
 #include "note-head.hh"
 #include "staff-symbol-referencer.hh"
 #include "staff-symbol.hh"
@@ -29,7 +39,7 @@ struct Ledger_line_spanner
 				    Interval x_extent,
 				    Real left_shorten);
 
-  static bool has_interface (Grob *);
+  DECLARE_GROB_INTERFACE ();
 };
 
 Stencil
@@ -43,7 +53,7 @@ Ledger_line_spanner::brew_ledger_lines (Grob *staff,
 {
   int line_count = (staff_extent.contains (pos)
 		    ? 0
-		    : sign (pos) * int (rint(pos -  staff_extent[Direction (sign (pos))])) / 2);
+		    : sign (pos) * int (rint (pos -  staff_extent[Direction (sign (pos))])) / 2);
   Stencil stencil;
   if (line_count)
     {
@@ -119,7 +129,10 @@ Ledger_line_spanner::set_spacing_rods (SCM smob)
   // find size of note heads.
   Grob *staff = Staff_symbol_referencer::get_staff_symbol (me);
   if (!staff)
-    return SCM_EOL;
+    {
+      me->suicide ();
+      return SCM_EOL;
+    }
 
   Real min_length_fraction
     = robust_scm2double (me->get_property ("minimum-length-fraction"), 0.15);
@@ -349,28 +362,27 @@ Ledger_line_spanner::print (SCM smob)
 }
 
 ADD_INTERFACE (Ledger_line_spanner,
-	       "ledger-line-interface",
-
-	       "This spanner draws the ledger lines of a staff.\n"
-	       "This is a separate grob because it has to process\n"
-	       "all potential collisions between all note heads.",
+	       "This spanner draws the ledger lines of a staff.  This is a"
+	       " separate grob because it has to process all potential"
+	       " collisions between all note heads.",
 
 	       /* properties */
+	       "gap "	
+	       "length-fraction "	
+	       "minimum-length-fraction "
 	       "note-heads "
 	       "thickness "
-	       "minimum-length-fraction "
-	       "length-fraction "
-	       "gap");
+	       );
 
 struct Ledgered_interface
 {
-  static bool has_interface (Grob *);
+  DECLARE_GROB_INTERFACE ();
 };
 
 ADD_INTERFACE (Ledgered_interface,
-	       "ledgered-interface",
+	       "Objects that need ledger lines, typically note heads.  See"
+	       " also @ref{ledger-line-spanner-interface}.",
 
-	       "Objects that need ledger lines, typically "
-	       "note heads. See also @ref{ledger-line-interface}.",
-
-	       "no-ledgers");
+	       /* properties */
+	       "no-ledgers "
+	       );