1 files changed, 109 insertions, 0 deletions
diff --git a/svl/source/items/poolcach.cxx b/svl/source/items/poolcach.cxx
new file mode 100644
index 000000000..2d406e18c
--- /dev/null
+++ b/svl/source/items/poolcach.cxx
@@ -0,0 +1,109 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <svl/itempool.hxx>
+#include <svl/itemset.hxx>
+#include <svl/poolcach.hxx>
+#include <tools/debug.hxx>
+
+SfxItemPoolCache::SfxItemPoolCache( SfxItemPool *pItemPool,
+                                    const SfxPoolItem *pPutItem ):
+    pPool(pItemPool),
+    pSetToPut( nullptr ),
+    pItemToPut( &pItemPool->Put(*pPutItem) )
+{
+    DBG_ASSERT(pItemPool, "No Pool provided");
+}
+
+
+SfxItemPoolCache::SfxItemPoolCache( SfxItemPool *pItemPool,
+                                    const SfxItemSet *pPutSet ):
+    pPool(pItemPool),
+    pSetToPut( pPutSet ),
+    pItemToPut( nullptr )
+{
+    DBG_ASSERT(pItemPool, "No Pool provided");
+}
+
+
+SfxItemPoolCache::~SfxItemPoolCache()
+{
+    for (const SfxItemModifyImpl & rImpl : m_aCache) {
+        pPool->Remove( *rImpl.pPoolItem );
+        pPool->Remove( *rImpl.pOrigItem );
+    }
+
+    if ( pItemToPut )
+        pPool->Remove( *pItemToPut );
+}
+
+
+const SfxSetItem& SfxItemPoolCache::ApplyTo( const SfxSetItem &rOrigItem )
+{
+    DBG_ASSERT( pPool == rOrigItem.GetItemSet().GetPool(), "invalid Pool" );
+    DBG_ASSERT( IsDefaultItem( &rOrigItem ) || IsPooledItem( &rOrigItem ),
+                "original not in pool" );
+
+    // Find whether this Transformations ever occurred
+    for (const SfxItemModifyImpl & rMapEntry : m_aCache)
+    {
+        if ( rMapEntry.pOrigItem == &rOrigItem )
+        {
+            // Did anything change at all?
+            if ( rMapEntry.pPoolItem != &rOrigItem )
+            {
+                rMapEntry.pPoolItem->AddRef(2); // One for the cache
+                pPool->Put( rOrigItem );    //FIXME: AddRef?
+            }
+            return *rMapEntry.pPoolItem;
+        }
+    }
+
+    // Insert the new attributes in a new Set
+    std::unique_ptr<SfxSetItem> pNewItem(rOrigItem.Clone());
+    if ( pItemToPut )
+    {
+        pNewItem->GetItemSet().PutDirect( *pItemToPut );
+        DBG_ASSERT( &pNewItem->GetItemSet().Get( pItemToPut->Which() ) == pItemToPut,
+                    "wrong item in temporary set" );
+    }
+    else
+        pNewItem->GetItemSet().Put( *pSetToPut );
+    const SfxSetItem* pNewPoolItem = &pPool->Put( std::move(pNewItem) );
+
+    // Adapt refcount; one each for the cache
+    pNewPoolItem->AddRef( pNewPoolItem != &rOrigItem ? 2 : 1 );
+    pPool->Put( rOrigItem );    //FIXME: AddRef?
+
+    // Add the transformation to the cache
+    SfxItemModifyImpl aModify;
+    aModify.pOrigItem = &rOrigItem;
+    aModify.pPoolItem = const_cast<SfxSetItem*>(pNewPoolItem);
+    m_aCache.push_back( aModify );
+
+    DBG_ASSERT( !pItemToPut ||
+                &pNewPoolItem->GetItemSet().Get( pItemToPut->Which() ) == pItemToPut,
+                "wrong item in resulting set" );
+
+    return *pNewPoolItem;
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */