using System;
using System.Collections.Generic;
using System.Text;

namespace Biff8Excel.Excel
{
    public class Index : IDisposable 
    {
        Biff8Excel.Records.INdex m_index;
        uint m_streamOffset;     // Position of this record in the Output Stream
        uint m_DefColumnRecordOffset;
        uint[] m_DBOffsets;

        public byte[] WriteRecord()
        {
            return m_index.GetByte();
        }

        public uint StreamOffset
        {
            set { m_streamOffset = value; }
            get { return m_streamOffset; }
        }

        public ushort FirstRowUsed
        {
            set { m_index.FirstRowIndex = value; }
        }

        public ushort LastRowUsed
        {
            set {
                if ( value > (ushort.MaxValue - 1))
                    throw new ArgumentException("LastRowUsed too bigger", "value");

                m_index.LastRowIndex = ((uint)(value + 1)); }
        }

        public uint DefColumnRecordOffset
        {
            set 
            {
                m_DefColumnRecordOffset = value;
                m_index.DefColumnRecordOffset = value;
            }
            get { return m_DefColumnRecordOffset; }
        }

        public uint[] DBCellOffsets
        {
            set
            {
                m_DBOffsets = value;
                m_index.DBCellOffsets = value;
            }
            get { return m_DBOffsets; }
        }

        public Index()
        {
            m_index = new Biff8Excel.Records.INdex();
        }

        #region IDisposable ³ΙΤ±

        public void Dispose()
        {
            m_index = null;
        }

        #endregion
    }
}