using System;
using System.Collections.Generic;
using System.Text;
using Biff8Excel.Records;

namespace Biff8Excel.Excel
{
    public class MergedCells:IDisposable 
    {
        Records.MergedCells m_merged;
        Records.StructMergedCells[] m_arrMergedCells;
        ushort m_total;

        internal byte[] WriteRecord()
        {
            if (m_total > 0)
            {
                Array.Resize<StructMergedCells>(ref m_arrMergedCells, m_total);
                m_merged.SetMergedCells = m_arrMergedCells;

                return m_merged.GetByte();
            }
            return null;
        }

        internal void AddMergedCells(ushort iFirstRow, ushort iLastRow, ushort iFirstColumn, ushort iLastColumn)
        {
            // Zero Based
            if (iFirstRow > 0)
                iFirstRow--;

            if (iLastRow > 0)
                iLastRow--;

            if (iFirstColumn > 0)
                iFirstColumn--;

            if (iLastColumn > 0)
                iLastColumn--;

            if (m_total >= m_arrMergedCells.Length)
            {
                Array.Resize<StructMergedCells>(ref m_arrMergedCells, m_arrMergedCells.Length + 10);
            }

            m_total++;

            m_arrMergedCells[m_total - 1].mcFirstCol = iFirstColumn;
            m_arrMergedCells[m_total - 1].mcFirstRow = iFirstRow;
            m_arrMergedCells[m_total - 1].mcLastCol  = iLastColumn;
            m_arrMergedCells[m_total - 1].mcLastRow = iLastRow;

        }

        internal ushort Total
        {
            get { return m_total; }
        }

        public MergedCells()
        {
            m_merged = new Biff8Excel.Records.MergedCells();
            m_arrMergedCells = new StructMergedCells[10];                // make room for 10 in the array
        }


        #region IDisposable ³ΙΤ±

        public void Dispose()
        {
            m_merged = null;
            m_arrMergedCells = null;
        }

        #endregion
    }
}