xmloff/source/forms/ifacecompare.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_XMLOFF_SOURCE_FORMS_IFACECOMPARE_HXX
  21 #define INCLUDED_XMLOFF_SOURCE_FORMS_IFACECOMPARE_HXX
  22
  23 #include <comphelper/stl_types.hxx>
  24 #include <com/sun/star/beans/XPropertySet.hpp>
  25 #include <com/sun/star/drawing/XDrawPage.hpp>
  26
  27 namespace xmloff
  28 {
  29
  30     //= OInterfaceCompare
  31     /** is stl-compliant structure for comparing Reference&lt; &lt;iface&gt; &gt; instances
  32     */
  33     template < class IAFCE >
  34     struct OInterfaceCompare
  35         :public ::std::binary_function  <   ::com::sun::star::uno::Reference< IAFCE >
  36                                         ,   ::com::sun::star::uno::Reference< IAFCE >
  37                                         ,   bool
  38                                         >
  39     {
  40         bool operator() (const ::com::sun::star::uno::Reference< IAFCE >& lhs, const ::com::sun::star::uno::Reference< IAFCE >& rhs) const
  41         {
  42             return lhs.get() < rhs.get();
  43                 // this does not make any sense if you see the semantics of the pointer returned by get:
  44                 // It's a pointer to a point in memory where an interface implementation lies.
  45                 // But for our purpose (provide a reliable less-operator which can be used with the STL), this is
  46                 // sufficient ....
  47         }
  48     };
  49
  50     typedef OInterfaceCompare< ::com::sun::star::beans::XPropertySet >  OPropertySetCompare;
  51     typedef OInterfaceCompare< ::com::sun::star::drawing::XDrawPage >   ODrawPageCompare;
  52
  53 }   // namespace xmloff
  54
  55 #endif // INCLUDED_XMLOFF_SOURCE_FORMS_IFACECOMPARE_HXX
  56
  57 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */