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diff --git a/include/svx/sdr/properties/defaultproperties.hxx b/include/svx/sdr/properties/defaultproperties.hxx
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+++ b/include/svx/sdr/properties/defaultproperties.hxx
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+/* -*- 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 .
+ */
+
+#ifndef INCLUDED_SVX_SDR_PROPERTIES_DEFAULTPROPERTIES_HXX
+#define INCLUDED_SVX_SDR_PROPERTIES_DEFAULTPROPERTIES_HXX
+
+#include <sal/config.h>
+
+#include <optional>
+
+#include <svx/sdr/properties/properties.hxx>
+#include <svx/svxdllapi.h>
+#include <svl/itemset.hxx>
+#include <o3tl/span.hxx>
+
+struct _xmlTextWriter;
+typedef struct _xmlTextWriter* xmlTextWriterPtr;
+
+namespace sdr::properties
+    {
+        class SVXCORE_DLLPUBLIC DefaultProperties : public BaseProperties
+        {
+        protected:
+            // the to be used ItemSet
+            mutable std::optional<SfxItemSet> mxItemSet;
+
+            // create a new object specific itemset with object specific ranges.
+            virtual SfxItemSet CreateObjectSpecificItemSet(SfxItemPool& pPool) override;
+
+            // Test changeability for a single item. If an implementation wants to prevent
+            // changing an item it should override this method.
+            virtual bool AllowItemChange(const sal_uInt16 nWhich, const SfxPoolItem* pNewItem = nullptr) const;
+
+            // Do the internal ItemChange. If only nWhich is given, the item needs to be cleared.
+            // Also needs to handle if nWhich and pNewItem is 0, which means to clear all items.
+            virtual void ItemChange(const sal_uInt16 nWhich, const SfxPoolItem* pNewItem = nullptr);
+
+            // Called after ItemChange() is done for all items. Allows local reactions on
+            // specific item changes
+            virtual void PostItemChange(const sal_uInt16 nWhich);
+
+            // Internally react on ItemSet changes. The given span contains changed items.
+            // If nDeletedWhich is not 0, it indicates a deleted item.
+            virtual void ItemSetChanged(o3tl::span< const SfxPoolItem* const > aChangedItems, sal_uInt16 nDeletedWhich);
+
+            // check if SfxItemSet exists
+            bool HasSfxItemSet() const { return bool(mxItemSet); }
+
+        public:
+            // basic constructor
+            explicit DefaultProperties(SdrObject& rObj);
+
+            // constructor for copying, but using new object
+            DefaultProperties(const DefaultProperties& rProps, SdrObject& rObj);
+
+            // destructor
+            virtual ~DefaultProperties() override;
+
+            void dumpAsXml(xmlTextWriterPtr pWriter) const override;
+
+            // Clone() operator, normally just calls the local copy constructor
+            virtual std::unique_ptr<BaseProperties> Clone(SdrObject& rObj) const override;
+
+            // get itemset
+            virtual const SfxItemSet& GetObjectItemSet() const override;
+
+            // set single item
+            virtual void SetObjectItem(const SfxPoolItem& rItem) override;
+
+            // set single item direct, do not do any notifies or things like that
+            virtual void SetObjectItemDirect(const SfxPoolItem& rItem) override;
+
+            // clear single item
+            virtual void ClearObjectItem(const sal_uInt16 nWhich = 0) override;
+
+            // clear single item direct, do not do any notifies or things like that.
+            // Also supports complete deletion of items when default parameter 0 is used.
+            virtual void ClearObjectItemDirect(const sal_uInt16 nWhich) override;
+
+            // set complete item set
+            virtual void SetObjectItemSet(const SfxItemSet& rSet) override;
+
+            // set a new StyleSheet and broadcast
+            virtual void SetStyleSheet(SfxStyleSheet* pNewStyleSheet, bool bDontRemoveHardAttr,
+                bool bBroadcast) override;
+
+            // get the installed StyleSheet
+            virtual SfxStyleSheet* GetStyleSheet() const override;
+
+            // force default attributes for a specific object type, called from
+            // DefaultProperties::GetObjectItemSet() if a new ItemSet is created.
+            // Default implementation does nothing.
+            virtual void ForceDefaultAttributes();
+        };
+
+} // end of namespace sdr::properties
+
+#endif // INCLUDED_SVX_SDR_PROPERTIES_DEFAULTPROPERTIES_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */