xmloff/source/style/SinglePropertySetInfoCache.cxx

   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 #include <com/sun/star/lang/XTypeProvider.hpp>
  21 #include <cppuhelper/weakref.hxx>
  22 #include <xmloff/SinglePropertySetInfoCache.hxx>
  23
  24 using namespace ::com::sun::star::uno;
  25 using ::com::sun::star::lang::XTypeProvider;
  26 using ::com::sun::star::beans::XPropertySet;
  27 using ::com::sun::star::beans::XPropertySetInfo;
  28
  29 sal_Bool SinglePropertySetInfoCache::hasProperty(
  30         const Reference< XPropertySet >& rPropSet,
  31         Reference< XPropertySetInfo >& rPropSetInfo )
  32 {
  33     if( !rPropSetInfo.is() )
  34         rPropSetInfo = rPropSet->getPropertySetInfo();
  35     sal_Bool bRet = sal_False, bValid = sal_False;
  36     Reference < XTypeProvider > xTypeProv( rPropSet, UNO_QUERY );
  37     Sequence< sal_Int8 > aImplId;
  38     if( xTypeProv.is() )
  39     {
  40         aImplId = xTypeProv->getImplementationId();
  41         if( aImplId.getLength() == 16 )
  42         {
  43             // The key must not be created outside this block, because it
  44             // keeps a reference to the property set info.
  45             PropertySetInfoKey aKey( rPropSetInfo, aImplId );
  46             iterator aIter = find( aKey );
  47             if( aIter != end() )
  48             {
  49                 bRet = (*aIter).second;
  50                 bValid = sal_True;
  51             }
  52         }
  53     }
  54     if( !bValid )
  55     {
  56         bRet = rPropSetInfo->hasPropertyByName( sName );
  57         if( xTypeProv.is() && aImplId.getLength() == 16 )
  58         {
  59             // Check whether the property set info is destroyed if it is
  60             // assigned to a weak reference only. If it is destroyed, then
  61             // every instance of getPropertySetInfo returns a new object.
  62             // Such property set infos must not be cached.
  63             WeakReference < XPropertySetInfo > xWeakInfo( rPropSetInfo );
  64             rPropSetInfo = 0;
  65             rPropSetInfo = xWeakInfo;
  66             if( rPropSetInfo.is() )
  67             {
  68                 PropertySetInfoKey aKey( rPropSetInfo, aImplId );
  69                 value_type aValue( aKey, bRet );
  70                 insert( aValue );
  71             }
  72         }
  73     }
  74
  75     return bRet;
  76 }
  77
  78 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */