/*
* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
*   this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
*   this list of conditions and the following disclaimer in the documentation
*   and/or other materials provided with the distribution.
* - Neither the name of Nokia Corporation nor the names of its contributors
*   may be used to endorse or promote products derived from this software
*   without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* 
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: 
*
*/

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

namespace HeapLib.Cells.Descriptors
{
    public class DescriptorInfo
    {
        #region Constructors & destructor
        internal DescriptorInfo( HeapCell aCell )
            : this( aCell, false )
        {
        }

        internal DescriptorInfo( HeapCell aCell, bool aIsUnicode )
        {
            iCell = aCell;
            iType = DescriptorType( aCell );
            iIsUnicode = aIsUnicode;
        }
        #endregion

        #region API
        public static HeapCell.TDescriptorType DescriptorType( HeapCell aCell )
        {
            HeapCell.TDescriptorType ret = HeapCell.TDescriptorType.EUnknown;
            //
            int type = (int) ( aCell.PossibleVTableAddress >> KDescriptorTypeShiftCount );
            if ( type >= (int) HeapCell.TDescriptorType.EBufC && type < (int) HeapCell.TDescriptorType.EUnknown )
            {
                ret = (HeapCell.TDescriptorType) type;
            }
            //
            return ret;
        }
        #endregion

        #region Properties
        public bool IsUnicode
        {
            get { return iIsUnicode; }
            set { iIsUnicode = value; }
        }

        public string Text
        {
            get { return iText; }
            set { iText = value; }
        }

        public int Length
        {
            get { return iText.Length; }
        }

        public HeapCell.TDescriptorType Type
        {
            get { return iType; }
            set
            {
                iType = value;
            }
        }
        #endregion

        #region Internal constants
        private const int KDescriptorTypeShiftCount = 28;
        #endregion

        #region Data members
        private readonly HeapCell iCell;
        private bool iIsUnicode = false;
        private HeapCell.TDescriptorType iType = HeapCell.TDescriptorType.EUnknown;
        private string iText = string.Empty;
        #endregion
    }
}