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diff --git a/oox/source/drawingml/diagram/diagramfragmenthandler.hxx b/oox/source/drawingml/diagram/diagramfragmenthandler.hxx
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+++ b/oox/source/drawingml/diagram/diagramfragmenthandler.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_OOX_SOURCE_DRAWINGML_DIAGRAM_DIAGRAMFRAGMENTHANDLER_HXX
+#define INCLUDED_OOX_SOURCE_DRAWINGML_DIAGRAM_DIAGRAMFRAGMENTHANDLER_HXX
+
+#include <oox/core/fragmenthandler2.hxx>
+
+#include "diagram.hxx"
+
+namespace oox::drawingml {
+
+class DiagramDataFragmentHandler : public ::oox::core::FragmentHandler2
+{
+public:
+    DiagramDataFragmentHandler(oox::core::XmlFilterBase& rFilter, const OUString& rFragmentPath, const OoxDiagramDataPtr& rDataPtr);
+    virtual ~DiagramDataFragmentHandler() noexcept override;
+
+    virtual void SAL_CALL endDocument() override;
+    virtual ::oox::core::ContextHandlerRef onCreateContext( ::sal_Int32 Element, const ::oox::AttributeList& rAttribs ) override;
+
+private:
+
+    OoxDiagramDataPtr mpDataPtr;
+};
+
+class DiagramLayoutFragmentHandler : public ::oox::core::FragmentHandler2
+{
+public:
+    DiagramLayoutFragmentHandler(oox::core::XmlFilterBase& rFilter, const OUString& rFragmentPath, const DiagramLayoutPtr& rDataPtr);
+    virtual ~DiagramLayoutFragmentHandler() noexcept override;
+
+    virtual void SAL_CALL endDocument() override;
+    virtual ::oox::core::ContextHandlerRef onCreateContext( ::sal_Int32 Element, const ::oox::AttributeList& rAttribs ) override;
+
+private:
+
+    DiagramLayoutPtr    mpDataPtr;
+};
+
+class DiagramQStylesFragmentHandler : public ::oox::core::FragmentHandler2
+{
+public:
+    DiagramQStylesFragmentHandler(
+        oox::core::XmlFilterBase& rFilter,
+        const OUString& rFragmentPath,
+        DiagramQStyleMap& rStylesMap );
+
+    virtual ::oox::core::ContextHandlerRef onCreateContext( sal_Int32 nElement, const AttributeList& rAttribs ) override;
+
+    virtual void onStartElement( const AttributeList& rAttribs ) override;
+    virtual void onEndElement() override;
+
+private:
+    ::oox::core::ContextHandlerRef createStyleMatrixContext(sal_Int32 nElement,
+                                                            const AttributeList& rAttribs,
+                                                            ShapeStyleRef& o_rStyle);
+
+    OUString   maStyleName;
+    DiagramStyle      maStyleEntry;
+    DiagramQStyleMap& mrStylesMap;
+};
+
+class ColorFragmentHandler : public ::oox::core::FragmentHandler2
+{
+public:
+    ColorFragmentHandler(
+        ::oox::core::XmlFilterBase& rFilter,
+        const OUString& rFragmentPath,
+        DiagramColorMap& rColorMap );
+
+    virtual ::oox::core::ContextHandlerRef onCreateContext( sal_Int32 nElement, const AttributeList& rAttribs ) override;
+
+    virtual void onStartElement( const AttributeList& rAttribs ) override;
+    virtual void onEndElement() override;
+
+private:
+    OUString   maColorName;
+    DiagramColor      maColorEntry;
+    DiagramColorMap&  mrColorsMap;
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */