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/*************************************************************************

 * @file

 *  index manager, to maintain the map between object id and offset

 ************************************************************************/

#ifndef INCLUDED_LOTUSWORDPRO_INC_LWPIDXMGR_HXX

#define INCLUDED_LOTUSWORDPRO_INC_LWPIDXMGR_HXX

#include <config_lgpl.h>

#include "lwpobjid.hxx"

#include "lwpobjstrm.hxx"

/**

 * @brief   key structure used to map id to offset

*/

struct LwpKey

{

    LwpObjectID id;

    sal_uInt32 offset = 0;

};

/**

 * @brief   LwpIndexManager, to read all index records and maintain the index information

*/

class LwpIndexManager final

{

public:

    LwpIndexManager();

private:

    static const sal_uInt8 MAXOBJECTIDS;

    std::vector<LwpKey> m_ObjectKeys;      //the <id, offset> ordered vector

    std::vector<LwpKey> m_RootObjs;        //For those object ids in RootObjIndex

    std::vector<sal_uInt32> m_TimeTable;   //Time table for object low id compression

    //sal_uInt16 m_nKeyCount;

    sal_uInt32 m_nKeyCount;     //the count of all object

    std::vector<sal_uInt32> m_TempVec;  // a temp vector , store the offset of leafindex

    sal_uInt32 m_ChildIndex[256];   //Offset of leaf index

    sal_uInt16 m_nLeafCount;

    void ReadRootData(LwpObjectStream *pObjStrm );  //Read root index data

    //Add new method to handle ObjIndex

    void ReadObjIndexData(LwpObjectStream* pObjStrm);

    void ReadObjIndex( LwpSvStream *pStrm );    //Read Obj index

    void ReadLeafIndex( LwpSvStream *pStrm );   //Read leaf index obj

    void ReadLeafData( LwpObjectStream *pStrm );    //Read leaf index obj data

    void ReadTimeTable( LwpObjectStream *pStrm );

public:

    void Read( LwpSvStream *pStrm );

    sal_uInt32 GetObjOffset( LwpObjectID objid );

    sal_uInt32 GetObjTime( sal_uInt16 index ) { return m_TimeTable.at(index-1); }

};

#endif

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