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diff --git a/xmloff/source/transform/TransformerBase.hxx b/xmloff/source/transform/TransformerBase.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 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vector>
+#include <memory>
+
+#include <com/sun/star/xml/sax/XAttributeList.hpp>
+#include <com/sun/star/xml/sax/XLocator.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/frame/XModel.hpp>
+#include <rtl/ref.hxx>
+#include <xmloff/xmltoken.hxx>
+#include <xmloff/namespacemap.hxx>
+
+#include "Transformer.hxx"
+#include "TransformerActions.hxx"
+#include "TransformerTokenMap.hxx"
+
+namespace com::sun::star {
+    namespace i18n { class XCharacterClassification; }
+}
+
+class SvXMLNamespaceMap;
+class XMLTransformerContext;
+class XMLTransformerActions;
+struct XMLTransformerActionInit;
+struct TransformerAction_Impl;
+class XMLMutableAttributeList;
+
+const sal_uInt16 INVALID_ACTIONS = 0xffff;
+
+class XMLTransformerBase : public XMLTransformer
+{
+    friend class XMLTransformerContext;
+
+    css::uno::Reference< css::xml::sax::XDocumentHandler >            m_xHandler;     // the handlers
+    css::uno::Reference< css::beans::XPropertySet >                   m_xPropSet;
+    css::uno::Reference< css::i18n::XCharacterClassification >        xCharClass;
+
+    OUString m_aExtPathPrefix;
+    OUString m_aClass;
+
+    std::unique_ptr<SvXMLNamespaceMap> m_pNamespaceMap;
+    SvXMLNamespaceMap           m_vReplaceNamespaceMap;
+    std::vector<rtl::Reference<XMLTransformerContext>> m_vContexts;
+    XMLTransformerActions       m_ElemActions;
+    XMLTransformerTokenMap const m_TokenMap;
+
+protected:
+    css::uno::Reference< css::frame::XModel >     mxModel;
+
+    // This method is called after the namespace map has been updated, but
+    // before a context for the current element has been pushed.
+    XMLTransformerContext *CreateContext( sal_uInt16 nPrefix,
+                                      const OUString& rLocalName,
+                                      const OUString& rQName );
+
+public:
+    XMLTransformerBase( XMLTransformerActionInit const *pInit,
+                           ::xmloff::token::XMLTokenEnum const *pTKMapInit ) noexcept;
+    virtual ~XMLTransformerBase() noexcept override;
+
+    // css::xml::sax::XDocumentHandler
+    virtual void SAL_CALL startDocument() override;
+    virtual void SAL_CALL endDocument() override;
+    virtual void SAL_CALL startElement(const OUString& aName,
+                              const css::uno::Reference< css::xml::sax::XAttributeList > & xAttribs) override;
+    virtual void SAL_CALL endElement(const OUString& aName) override;
+    virtual void SAL_CALL characters(const OUString& aChars) override;
+    virtual void SAL_CALL ignorableWhitespace(const OUString& aWhitespaces) override;
+    virtual void SAL_CALL processingInstruction(const OUString& aTarget,
+                                       const OUString& aData) override;
+    virtual void SAL_CALL setDocumentLocator(const css::uno::Reference< css::xml::sax::XLocator > & xLocator) override;
+
+    // css::xml::sax::XExtendedDocumentHandler
+    virtual void SAL_CALL startCDATA() override;
+    virtual void SAL_CALL endCDATA() override;
+    virtual void SAL_CALL comment(const OUString& sComment) override;
+    virtual void SAL_CALL allowLineBreak() override;
+    virtual void SAL_CALL unknown(const OUString& sString) override;
+
+    // XInitialization
+    virtual void SAL_CALL initialize( const css::uno::Sequence< css::uno::Any >& aArguments ) override;
+
+    // C++
+    const css::uno::Reference< css::xml::sax::XDocumentHandler > & GetDocHandler() const { return m_xHandler; }
+
+    const css::uno::Reference< css::beans::XPropertySet > & GetPropertySet() const { return m_xPropSet; }
+
+
+    SvXMLNamespaceMap& GetNamespaceMap() { return *m_pNamespaceMap; }
+    const SvXMLNamespaceMap& GetNamespaceMap() const { return *m_pNamespaceMap; }
+    SvXMLNamespaceMap& GetReplaceNamespaceMap() { return m_vReplaceNamespaceMap; }
+
+    XMLTransformerActions& GetElemActions() { return m_ElemActions; }
+    virtual XMLTransformerActions *GetUserDefinedActions( sal_uInt16 n );
+    virtual XMLTransformerContext *CreateUserDefinedContext(
+                                      const TransformerAction_Impl& rAction,
+                                      const OUString& rQName,
+                                         bool bPersistent=false ) = 0;
+    virtual OUString GetEventName( const OUString& rName,
+                                             bool bForm = false ) = 0;
+
+
+    XMLMutableAttributeList *ProcessAttrList( css::uno::Reference< css::xml::sax::XAttributeList >& rAttrList,
+                         sal_uInt16 nActionMap, bool bClone );
+
+    static bool ReplaceSingleInchWithIn( OUString& rValue );
+    static bool ReplaceSingleInWithInch( OUString& rValue );
+    static bool ReplaceInchWithIn( OUString& rValue );
+    static bool ReplaceInWithInch( OUString& rValue );
+
+    bool EncodeStyleName( OUString& rName ) const;
+    static bool DecodeStyleName( OUString& rName );
+    static bool NegPercent( OUString& rValue );
+
+    void AddNamespacePrefix( OUString& rName,
+                                 sal_uInt16 nPrefix ) const;
+    bool RemoveNamespacePrefix( OUString& rName,
+                                    sal_uInt16 nPrefixOnly=0xffffU ) const;
+
+    bool ConvertURIToOASIS( OUString& rURI,
+                                bool bSupportPackage ) const;
+    bool ConvertURIToOOo( OUString& rURI,
+                                bool bSupportPackage ) const;
+
+    /** renames the given rOutAttributeValue if one of the parameters contains a
+        matching token in its lower 16 bits.  The value is converted to the
+        token that is given in the upper 16 bits of the matching parameter.
+     */
+    static bool RenameAttributeValue( OUString& rOutAttributeValue,
+                                   sal_Int32 nParam1,
+                                   sal_Int32 nParam2,
+                                   sal_Int32 nParam3 );
+
+    /** converts the '.' that separates fractions of seconds in a dateTime
+        string into a ',' that was used in the OOo format
+
+        @param rDateTime
+            A dateTime string that will be parsed and changed in case a match
+            was found.
+        @return <TRUE/> if the given string was changed
+     */
+    static bool ConvertRNGDateTimeToISO( OUString& rDateTime );
+
+    ::xmloff::token::XMLTokenEnum GetToken( const OUString& rStr ) const;
+
+    const XMLTransformerContext *GetCurrentContext() const;
+    const XMLTransformerContext *GetAncestorContext( sal_uInt32 i ) const;
+
+    // C++
+    void SetClass( const OUString& r ) { m_aClass = r; }
+    const OUString& GetClass() const { return m_aClass; }
+
+    bool isWriter() const;
+
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */