svl/source/items/poolcach.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
  21 #include <limits.h>
  22
  23 #include <svl/itempool.hxx>
  24 #include <svl/itemset.hxx>
  25 #include <svl/poolcach.hxx>
  26 #include <tools/debug.hxx>
  27
  28 SfxItemPoolCache::SfxItemPoolCache( SfxItemPool *pItemPool,
  29                                     const SfxPoolItem *pPutItem ):
  30     pPool(pItemPool),
  31     pSetToPut( nullptr ),
  32     pItemToPut( &pItemPool->Put(*pPutItem) )
  33 {
  34     DBG_ASSERT(pItemPool, "No Pool provided");
  35 }
  36
  37
  38 SfxItemPoolCache::SfxItemPoolCache( SfxItemPool *pItemPool,
  39                                     const SfxItemSet *pPutSet ):
  40     pPool(pItemPool),
  41     pSetToPut( pPutSet ),
  42     pItemToPut( nullptr )
  43 {
  44     DBG_ASSERT(pItemPool, "No Pool provided");
  45 }
  46
  47
  48 SfxItemPoolCache::~SfxItemPoolCache()
  49 {
  50     for (SfxItemModifyImpl & rImpl : m_aCache) {
  51         pPool->Remove( *rImpl.pPoolItem );
  52         pPool->Remove( *rImpl.pOrigItem );
  53     }
  54
  55     if ( pItemToPut )
  56         pPool->Remove( *pItemToPut );
  57 }
  58
  59
  60 const SfxSetItem& SfxItemPoolCache::ApplyTo( const SfxSetItem &rOrigItem )
  61 {
  62     DBG_ASSERT( pPool == rOrigItem.GetItemSet().GetPool(), "invalid Pool" );
  63     DBG_ASSERT( IsDefaultItem( &rOrigItem ) || IsPooledItem( &rOrigItem ),
  64                 "original not in pool" );
  65
  66     // Find whether this Transformations ever occurred
  67     for (SfxItemModifyImpl & rMapEntry : m_aCache)
  68     {
  69         if ( rMapEntry.pOrigItem == &rOrigItem )
  70         {
  71             // Did anything change at all?
  72             if ( rMapEntry.pPoolItem != &rOrigItem )
  73             {
  74                 rMapEntry.pPoolItem->AddRef(2); // One for the cache
  75                 pPool->Put( rOrigItem );    //FIXME: AddRef?
  76             }
  77             return *rMapEntry.pPoolItem;
  78         }
  79     }
  80
  81     // Insert the new attributes in a new Set
  82     std::unique_ptr<SfxSetItem> pNewItem(static_cast<SfxSetItem *>(rOrigItem.Clone()));
  83     if ( pItemToPut )
  84     {
  85         pNewItem->GetItemSet().PutDirect( *pItemToPut );
  86         DBG_ASSERT( &pNewItem->GetItemSet().Get( pItemToPut->Which() ) == pItemToPut,
  87                     "wrong item in temporary set" );
  88     }
  89     else
  90         pNewItem->GetItemSet().Put( *pSetToPut );
  91     const SfxSetItem* pNewPoolItem = &pPool->Put( std::move(pNewItem) );
  92
  93     // Adapt refcount; one each for the cache
  94     pNewPoolItem->AddRef( pNewPoolItem != &rOrigItem ? 2 : 1 );
  95     pPool->Put( rOrigItem );    //FIXME: AddRef?
  96
  97     // Add the transformation to the cache
  98     SfxItemModifyImpl aModify;
  99     aModify.pOrigItem = &rOrigItem;
 100     aModify.pPoolItem = const_cast<SfxSetItem*>(pNewPoolItem);
 101     m_aCache.push_back( aModify );
 102
 103     DBG_ASSERT( !pItemToPut ||
 104                 &pNewPoolItem->GetItemSet().Get( pItemToPut->Which() ) == pItemToPut,
 105                 "wrong item in resulting set" );
 106
 107     return *pNewPoolItem;
 108 }
 109
 110
 111 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */