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 *  Sun Microsystems Inc., October, 2000
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 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
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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 <rtl/ustring.hxx>
#include "lwpobjhdr.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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