X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fdimension-cache.cc;h=33294db5e62cd37c9a3253554b083f94f6b023de;hb=0b2733b81b536588f50b95207c158c2b84a8e9a9;hp=12fb2906e95736c26de5f96d4f8d88666734206c;hpb=9106e3bd374198c5457c35181ae1d66b3ec95236;p=lilypond.git

diff --git a/lily/dimension-cache.cc b/lily/dimension-cache.cc
index 12fb2906e9..33294db5e6 100644
--- a/lily/dimension-cache.cc
+++ b/lily/dimension-cache.cc
@@ -1,13 +1,24 @@
 /*
-  dimension-cache.cc -- implement Dimension_cache
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1998--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 1998--2005 Han-Wen Nienhuys <hanwen@cs.uu.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 "dimension-cache.hh"
+
 #include "warn.hh"
 #include "grob.hh"
 
@@ -19,6 +30,16 @@ Dimension_cache::Dimension_cache (Dimension_cache const &d)
   extent_ = d.extent_ ? new Interval (*d.extent_) : 0;
 }
 
+Dimension_cache &
+Dimension_cache::operator = (Dimension_cache const &d)
+{
+  clear ();
+  offset_ = d.offset_ ? new Real (*d.offset_) : 0;
+  parent_ = d.parent_;
+  extent_ = d.extent_ ? new Interval (*d.extent_) : 0;
+  return *this;
+}
+
 Dimension_cache::Dimension_cache ()
 {
   init ();
@@ -33,7 +54,15 @@ Dimension_cache::init ()
 }
 
 Dimension_cache::~Dimension_cache ()
+{
+  clear ();
+}
+
+void
+Dimension_cache::clear ()
 {
   delete extent_;
   delete offset_;
+  extent_ = 0;
+  offset_ = 0;
 }