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