/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * This file incorporates work covered by the following license notice:

 *

 *   Licensed to the Apache Software Foundation (ASF) under one or more

 *   contributor license agreements. See the NOTICE file distributed

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you under the Apache

 *   License, Version 2.0 (the "License"); you may not use this file

 *   except in compliance with the License. You may obtain a copy of

 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .

 */

#include <osl/thread.h>

#include <sot/formats.hxx>

#include <tools/stream.hxx>

#include <vcl/inetimg.hxx>

#include <o3tl/string_view.hxx>

const sal_Unicode TOKEN_SEPARATOR = '\001';

void INetImage::Write( SvStream& rOStm, SotClipboardFormatId nFormat ) const

{

    switch( nFormat )

    {

    case SotClipboardFormatId::INET_IMAGE:

        {

            OUString sString(

                aImageURL + OUStringChar(TOKEN_SEPARATOR) + aTargetURL

                + OUStringChar(TOKEN_SEPARATOR) + aTargetFrame

                + OUStringChar(TOKEN_SEPARATOR) /* + aAlternateText */

                + OUStringChar(TOKEN_SEPARATOR)

                + OUString::number(aSizePixel.Width())

                + OUStringChar(TOKEN_SEPARATOR)

                + OUString::number(aSizePixel.Height()));

            OString sOut(OUStringToOString(sString,

                RTL_TEXTENCODING_UTF8));

            rOStm.WriteBytes(sOut.getStr(), sOut.getLength());

            static const char aEndChar[2] = { 0 };

            rOStm.WriteBytes(aEndChar, sizeof(aEndChar));

        }

        break;

    case SotClipboardFormatId::NETSCAPE_IMAGE:

        break;

    default: break;

    }

}

bool INetImage::Read( SvStream& rIStm, SotClipboardFormatId nFormat )

{

    bool bRet = false;

    switch( nFormat )

    {

    case SotClipboardFormatId::INET_IMAGE:

        {

            OUString sINetImg = read_zeroTerminated_uInt8s_ToOUString(rIStm, RTL_TEXTENCODING_UTF8);

            sal_Int32 nStart = 0;

            aImageURL = sINetImg.getToken( 0, TOKEN_SEPARATOR, nStart );

            aTargetURL = sINetImg.getToken( 0, TOKEN_SEPARATOR, nStart );

            aTargetFrame = sINetImg.getToken( 0, TOKEN_SEPARATOR, nStart );

            /*aAlternateText =*/ sINetImg.getToken( 0, TOKEN_SEPARATOR, nStart );

            aSizePixel.setWidth( o3tl::toInt32(o3tl::getToken(sINetImg, 0, TOKEN_SEPARATOR,

                                                    nStart )) );

            aSizePixel.setHeight(o3tl::toInt32(o3tl::getToken( sINetImg, 0, TOKEN_SEPARATOR,

                                                    nStart )) );

            bRet = !sINetImg.isEmpty();

        }

        break;

    case SotClipboardFormatId::NETSCAPE_IMAGE:

        {

/*

    --> structure size  MUST - alignment of 4!

    int     iSize;              // size of all data, including variable length strings

    sal_Bool    bIsMap;             // For server side maps

    sal_Int32   iWidth;             // Fixed size data correspond to fields in LO_ImageDataStruct

    sal_Int32   iHeight;            //   and EDT_ImageData

    sal_Int32   iHSpace;

    sal_Int32   iVSpace;

    sal_Int32   iBorder;

    int     iLowResOffset;      // Offsets into string_data. If 0, string is NULL (not used)

    int     iAltOffset;         // (alternate text?)

    int     iAnchorOffset;      // HREF in image

    int     iExtraHTML_Offset;  // Extra HTML (stored in CImageElement)

    char pImageURL[1];      // Append all variable-length strings starting here

*/

            rtl_TextEncoding eSysCSet = osl_getThreadTextEncoding();

            sal_Int32 nVal, nAnchorOffset, nAltOffset;

            sal_uInt64 nFilePos;

            nFilePos = rIStm.Tell();

            // skip over iSize (int), bIsMao ( sal_Bool ) alignment of 4 !!!!

            rIStm.SeekRel( 8 );

            rIStm.ReadInt32( nVal );  aSizePixel.setWidth( nVal );

            rIStm.ReadInt32( nVal );  aSizePixel.setHeight( nVal );

            // skip over iHSpace, iVSpace, iBorder, iLowResOffset

            rIStm.SeekRel( 3 * sizeof( sal_Int32 ) + sizeof( int ) );

            rIStm.ReadInt32( nAltOffset );

            rIStm.ReadInt32( nAnchorOffset );

            // skip over iExtraHTML_Offset

            rIStm.SeekRel( sizeof( int ) );

            aImageURL = read_zeroTerminated_uInt8s_ToOUString(rIStm, eSysCSet);

            if( nAltOffset )

            {

                rIStm.Seek( nFilePos + nAltOffset );

                /*aAlternateText =*/ read_zeroTerminated_uInt8s_ToOUString(rIStm, eSysCSet);

            }

            if( nAnchorOffset )

            {

                rIStm.Seek( nFilePos + nAnchorOffset );

                aTargetURL = read_zeroTerminated_uInt8s_ToOUString(rIStm, eSysCSet);

            }

            else if( !aTargetURL.isEmpty() )

                aTargetURL.clear();

            bRet = ERRCODE_NONE == rIStm.GetError();

        }

        break;

    default: break;

    }

    return bRet;

}

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