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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_L10NTOOLS_INC_XMLPARSE_HXX
+#define INCLUDED_L10NTOOLS_INC_XMLPARSE_HXX
+
+#include <sal/config.h>
+
+#include <cstddef>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include <expat.h>
+
+#include <rtl/string.hxx>
+#include <rtl/strbuf.hxx>
+#include <unordered_map>
+
+class XMLParentNode;
+class XMLElement;
+
+enum class XMLNodeType{
+    XFILE   = 0x001,
+    ELEMENT = 0x002,
+    DATA    = 0x003,
+    COMMENT = 0x004,
+    DEFAULT = 0x005
+};
+
+/** Holds data of Attributes
+ */
+class XMLAttribute
+{
+private:
+    OString m_sName;
+    OString m_sValue;
+
+public:
+    /// creates an attribute
+    XMLAttribute(
+        OString _sName,    // attributes name
+        OString _sValue    // attributes data
+    )
+    : m_sName( std::move(_sName) ), m_sValue( std::move(_sValue) ) {}
+
+    const OString& GetName() const { return m_sName; }
+    const OString& GetValue() const { return m_sValue; }
+
+    void setValue( const OString &rValue ){ m_sValue = rValue; }
+};
+
+
+typedef std::vector< XMLAttribute* > XMLAttributeList;
+
+/** Virtual base to handle different kinds of XML nodes
+ */
+class XMLNode
+{
+protected:
+    XMLNode(){}
+
+public:
+    virtual XMLNodeType GetNodeType() const = 0;
+    virtual ~XMLNode(){}
+
+    XMLNode(XMLNode const &) = default;
+    XMLNode(XMLNode &&) = default;
+    XMLNode & operator =(XMLNode const &) = default;
+    XMLNode & operator =(XMLNode &&) = default;
+};
+
+
+/** Virtual base to handle different kinds of child nodes
+ */
+class XMLChildNode : public XMLNode
+{
+private:
+    XMLParentNode *m_pParent;
+
+protected:
+    XMLChildNode( XMLParentNode *pPar );
+    XMLChildNode( const XMLChildNode& rObj);
+    XMLChildNode& operator=(const XMLChildNode& rObj);
+public:
+    /// returns the parent of this node
+    XMLParentNode *GetParent() { return m_pParent; }
+};
+
+typedef std::vector< XMLChildNode* > XMLChildNodeList;
+
+class XMLData;
+
+/** Virtual base to handle different kinds of parent nodes
+ */
+
+class XMLParentNode : public XMLChildNode
+{
+private:
+    std::unique_ptr<XMLChildNodeList> m_pChildList;
+
+protected:
+    XMLParentNode( XMLParentNode *pPar )
+        : XMLChildNode( pPar ) {}
+
+    XMLParentNode( const XMLParentNode& );
+
+    XMLParentNode& operator=(const XMLParentNode& rObj);
+    virtual ~XMLParentNode() override;
+
+public:
+    /// returns child list of this node
+    XMLChildNodeList *GetChildList() { return m_pChildList.get(); }
+
+    /// adds a new child
+    void AddChild(
+        XMLChildNode *pChild    /// the new child
+    );
+
+    void RemoveAndDeleteAllChildren();
+};
+
+/// Mapping numeric Language code <-> XML Element
+typedef std::unordered_map<OString, XMLElement*> LangHashMap;
+
+/// Mapping XML Element string identifier <-> Language Map
+typedef std::unordered_map<OString, LangHashMap*> XMLHashMap;
+
+/** Holds information of a XML file, is root node of tree
+ */
+class XMLFile final : public XMLParentNode
+{
+public:
+    XMLFile(
+        OString sFileName // the file name, empty if created from memory stream
+    );
+    XMLFile( const XMLFile& rObj ) ;
+    virtual ~XMLFile() override;
+
+    void Print( XMLNode *pCur, sal_uInt16 nLevel = 0 );
+    void SearchL10NElements( XMLChildNode *pCur );
+    void Extract();
+
+    XMLHashMap* GetStrings(){ return m_pXMLStrings.get(); }
+    void Write( OString const &rFilename );
+    void Write( std::ofstream &rStream, XMLNode *pCur = nullptr );
+
+    bool CheckExportStatus( XMLChildNode *pCur = nullptr );
+
+    XMLFile& operator=(const XMLFile& rObj);
+
+    virtual XMLNodeType GetNodeType() const override { return XMLNodeType::XFILE; }
+
+    /// returns file name
+    const OString& GetName() const { return m_sFileName; }
+    void SetName( const OString &rFilename ) { m_sFileName = rFilename; }
+    const std::vector<OString>& getOrder() const { return m_vOrder; }
+
+private:
+
+    void InsertL10NElement( XMLElement* pElement);
+
+    // DATA
+    OString m_sFileName;
+
+    /// Mapping XML tag names <-> have localizable strings
+    std::unordered_map<OString, bool> m_aNodes_localize;
+
+    std::unique_ptr<XMLHashMap> m_pXMLStrings;
+
+    std::vector <OString> m_vOrder;
+};
+
+/// A Utility class for XML
+class XMLUtil
+{
+public:
+    /// Quot the XML characters
+    static OString QuotHTML( const OString& rString );
+};
+
+
+/** Hold information of an element node
+ */
+class XMLElement : public XMLParentNode
+{
+private:
+    OString m_sElementName;
+    std::unique_ptr<XMLAttributeList> m_pAttributes;
+
+protected:
+    void Print(XMLNode *pCur, OStringBuffer& rBuffer, bool bRootelement) const;
+public:
+    /// create an element node
+    XMLElement(
+        OString sName,    // the element name
+        XMLParentNode *pParent   // parent node of this element
+    );
+
+    virtual ~XMLElement() override;
+    XMLElement(const XMLElement&);
+
+    XMLElement& operator=(const XMLElement& rObj);
+    virtual XMLNodeType GetNodeType() const override { return XMLNodeType::ELEMENT; }
+
+    /// returns element name
+    const OString& GetName() const { return m_sElementName; }
+
+    /// returns list of attributes of this element
+    XMLAttributeList *GetAttributeList() { return m_pAttributes.get(); }
+
+    /// adds a new attribute to this element, typically used by parser
+    void AddAttribute( const OString &rAttribute, const OString &rValue );
+
+    void ChangeLanguageTag( const OString &rValue );
+
+    /// Return a Unicode String representation of this object
+    OString ToOString();
+};
+
+/** Holds character data
+ */
+class XMLData : public XMLChildNode
+{
+private:
+    OString m_sData;
+
+public:
+    /// create a data node
+    XMLData(
+        OString _sData,    // the initial data
+        XMLParentNode *pParent   // the parent node of this data, typically an element node
+    ) : XMLChildNode( pParent ), m_sData( std::move(_sData) ) {}
+
+    // Default copy constructor and copy operator work well.
+
+    virtual XMLNodeType GetNodeType() const override { return XMLNodeType::DATA; }
+
+    /// returns the data
+    const OString& GetData() const { return m_sData; }
+
+    /// adds new character data to the existing one
+    void AddData( const OString &rData ) { m_sData += rData; }
+};
+
+/** Holds comments
+ */
+class XMLComment final : public XMLChildNode
+{
+private:
+    OString m_sComment;
+
+public:
+    /// create a comment node
+    XMLComment(
+        OString _sComment, // the comment
+        XMLParentNode *pParent   // the parent node of this comment, typically an element node
+    )
+        : XMLChildNode( pParent ), m_sComment( std::move(_sComment) ) {}
+
+    // Default copy constructor and copy operator work well.
+
+    virtual XMLNodeType GetNodeType() const override { return XMLNodeType::COMMENT; }
+
+    /// returns the comment
+    const OString& GetComment() const { return m_sComment; }
+};
+
+/** Holds additional file content like those for which no handler exists
+ */
+class XMLDefault final : public XMLChildNode
+{
+private:
+    OString m_sDefault;
+
+public:
+    /// create a comment node
+    XMLDefault(
+        OString _sDefault, // the comment
+        XMLParentNode *pParent   // the parent node of this comment, typically an element node
+    )
+        : XMLChildNode( pParent ), m_sDefault( std::move(_sDefault) ) {}
+
+    // Default copy constructor and copy operator work well.
+
+    virtual XMLNodeType GetNodeType() const override { return XMLNodeType::DEFAULT; }
+
+    /// returns the comment
+    const OString& GetDefault() const { return m_sDefault; }
+};
+
+/** struct for error information, used by class SimpleXMLParser
+ */
+struct XMLError {
+    XML_Error m_eCode;    ///< the error code
+    std::size_t m_nLine; ///< error line number
+    std::size_t m_nColumn; ///< error column number
+    OString m_sMessage;    ///< readable error message
+};
+
+/** validating xml parser, creates a document tree with xml nodes
+ */
+
+class SimpleXMLParser
+{
+private:
+    XML_Parser m_aParser;
+    XMLError m_aErrorInformation;
+
+    XMLParentNode *m_pCurNode;
+    XMLData *m_pCurData;
+
+
+    static void StartElementHandler( void *userData, const XML_Char *name, const XML_Char **atts );
+    static void EndElementHandler( void *userData, const XML_Char *name );
+    static void CharacterDataHandler( void *userData, const XML_Char *s, int len );
+    static void CommentHandler( void *userData, const XML_Char *data );
+    static void DefaultHandler( void *userData, const XML_Char *s, int len );
+
+
+    void StartElement( const XML_Char *name, const XML_Char **atts );
+    void EndElement();
+    void CharacterData( const XML_Char *s, int len );
+    void Comment( const XML_Char *data );
+    void Default( const XML_Char *s, int len );
+
+public:
+    /// creates a new parser
+    SimpleXMLParser();
+    ~SimpleXMLParser();
+
+    /// parse a file, return false on critical errors
+    bool Execute(
+        const OString &rFileName,    // the file name
+        XMLFile* pXMLFile  // the XMLFile
+    );
+
+    /// returns an error struct
+    const XMLError &GetError() const { return m_aErrorInformation; }
+};
+
+#endif // INCLUDED_L10NTOOLS_INC_XMLPARSE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */