/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  This file contains the header file of the CWidgetBackupRegistryXml class.

*

*                This class processes persistent registry data in XML.

*

*/

#ifndef WIDGETBACKUPREGISTRYXML_H

#define WIDGETBACKUPREGISTRYXML_H

// INCLUDES

#include <libxml2_tree.h>

class RFs;

/**

*  CWidgetBackupRegistryXml

*  @since 5.0

*/

class CWidgetBackupRegistryXml: public CBase

    {

public:

    /**

     * Two-phased constructor.

     */

//    static CWidgetBackupRegistryXml* NewL();

    static CWidgetBackupRegistryXml* NewL();

    /**

     * Destructor.

     */

    virtual ~CWidgetBackupRegistryXml();

protected:

    /**

     * C++ default constructor.

     */

    CWidgetBackupRegistryXml();

    /**

     * Symbian 2nd phase constructor

     */

    void ConstructL();

public:

    /**

     * Traverse to the next Node

     *

     * @param aNode: current node

     * @since 5.0

     * @return next node

     */

    xmlNode* TraverseNextNode( xmlNode* aNode );

    /**

     * Convert a string in some encoding to UCS2.

     *

     * @param aEncoding encoding number

     * @param aUnicodeSizeMultiplier how many input bytes per unicode char

     * @param aInBuf input data

     * @param aOutBuf output data, allocated and returned to caller

     * @param aFileSession

     * @since 5.0

     * @return void

     */

    void ToUnicodeL( TInt aEncoding,

                     TInt aUnicodeSizeMultiplier,

                     TPtrC8 aInBuf, HBufC16** aOutBuf,

                     RFs& aFileSession );

    /**

     * Convert a string to some encoding from UCS2.

     *

     * @param aEncoding encoding number

     * @param aUnicodeSizeMultiplier how many input bytes per unicode char

     * @param aInBuf input data

     * @param aOutBuf output data, allocated and returned to caller

     * @param aFileSession

     * @since 5.0

     * @return void

     */

    void FromUnicodeL( TInt aEncoding,

                     TInt aUnicodeSizeMultiplier,

                     TPtrC16 aInBuf, HBufC8** aOutBuf,

                     RFs& aFileSession );

    /**

     * Utility to bundle extraction of XML text content

     *

     * @param aEncoding input buffer encoding

     * @param aUnicodeSizeMultiplier how many bytes of input make one unicode char

     * @param aInBuf input data in encoding

     * @param aOutBuf malloc'ed output buf, caller takes ownership

     * @param aFileSession CCnvCharacterSetConverter requires it

     * @since 5.0

     * @return void

     */

    void GetContentL( RFs& aFileSession,

                      xmlDocPtr aDoc,

                      xmlNode* aNode,

                      HBufC** aContent );

    /**

     * Utility to extract XML content as a string

     *

     * @param aFileSession CCnvCharacterSetConverter requires it

     * @param aDoc

     * @param aNode

     * @param aContent

     * @since 5.0

     * @return void

     */

    void GetTextContentAsStringL( RFs& aFileSession,

                                  xmlDocPtr aDoc,

                                  xmlNode* aNode,

                                  HBufC** aContent );

    void GetSubtreeAsStringL (RFs& aFileSession, xmlDocPtr aDoc, xmlNode* aNode, HBufC** aBuf, TInt& aLen);

    xmlChar* EncodeStringL(xmlDocPtr aDoc, xmlChar* aStringToConvert);

    HBufC* EncodeStringL(xmlDocPtr aDoc, TPtrC aStringToConvert, RFs& aFileSession);

    TInt EncodedStringLength(TPtrC8 aStringToConvert);

    TInt GetPropertyId(

        const TDesC& aKeyName );

    const TPtrC& XmlPropertyName( TInt aPropertyId );

    class TWidgetProperty

        {

    public:

        TInt id; // the TWidgetPropertyId for this name

        TPtrC name;

        TWidgetPropertyType type; // the type if valid

        TInt flags;

        };

    // Table describing registry entries for XML processing.  Used by

    // parser and generator. 

    RArray<TWidgetProperty> iProperties;

    };

#endif // WIDGETREGISTRYXML_H