/* -*- 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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