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/* -*- 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/.
*/
#include "htmlreqifreader.hxx"
#include <comphelper/scopeguard.hxx>
#include <filter/msfilter/rtfutil.hxx>
#include <rtl/strbuf.hxx>
#include <sot/storage.hxx>
#include <svtools/parrtf.hxx>
#include <svtools/rtfkeywd.hxx>
#include <svtools/rtftoken.h>
#include <tools/stream.hxx>
namespace
{
/// RTF parser that just extracts a single OLE2 object from a file.
class ReqIfRtfReader : public SvRTFParser
{
public:
ReqIfRtfReader(SvStream& rStream);
void NextToken(int nToken) override;
bool WriteObjectData(SvStream& rStream);
private:
bool m_bInObjData = false;
OStringBuffer m_aHex;
};
ReqIfRtfReader::ReqIfRtfReader(SvStream& rStream)
: SvRTFParser(rStream)
{
}
void ReqIfRtfReader::NextToken(int nToken)
{
switch (nToken)
{
case '}':
m_bInObjData = false;
break;
case RTF_TEXTTOKEN:
if (m_bInObjData)
m_aHex.append(OUStringToOString(aToken, RTL_TEXTENCODING_ASCII_US));
break;
case RTF_OBJDATA:
m_bInObjData = true;
break;
}
}
bool ReqIfRtfReader::WriteObjectData(SvStream& rOLE)
{
return msfilter::rtfutil::ExtractOLE2FromObjdata(m_aHex.makeStringAndClear(), rOLE);
}
/// Looks up what OLE1 calls the ClassName, see [MS-OLEDS] 2.3.8 CompObjStream.
OString ExtractOLEClassName(const tools::SvRef<SotStorage>& xStorage)
{
OString aRet;
SotStorageStream* pCompObj = xStorage->OpenSotStream("\1CompObj");
if (!pCompObj)
return aRet;
pCompObj->Seek(0);
pCompObj->SeekRel(28); // Header
if (!pCompObj->good())
return aRet;
sal_uInt32 nData;
pCompObj->ReadUInt32(nData); // AnsiUserType
pCompObj->SeekRel(nData);
if (!pCompObj->good())
return aRet;
pCompObj->ReadUInt32(nData); // AnsiClipboardFormat
pCompObj->SeekRel(nData);
if (!pCompObj->good())
return aRet;
pCompObj->ReadUInt32(nData); // Reserved1
return read_uInt8s_ToOString(*pCompObj, nData);
}
/// Inserts an OLE1 header before an OLE2 storage.
OString InsertOLE1Header(SvStream& rOle2, SvStream& rOle1)
{
rOle2.Seek(0);
tools::SvRef<SotStorage> xStorage(new SotStorage(rOle2));
if (xStorage->GetError() != ERRCODE_NONE)
return OString();
OString aClassName = ExtractOLEClassName(xStorage);
// Write ObjectHeader, see [MS-OLEDS] 2.2.4.
rOle1.Seek(0);
// OLEVersion.
rOle1.WriteUInt32(0);
// FormatID is EmbeddedObject.
rOle1.WriteUInt32(0x00000002);
// ClassName
rOle1.WriteUInt32(aClassName.getLength());
rOle1.WriteOString(aClassName);
// Null terminated pascal string.
rOle1.WriteChar(0);
// TopicName.
rOle1.WriteUInt32(0);
// ItemName.
rOle1.WriteUInt32(0);
// NativeDataSize
rOle2.Seek(STREAM_SEEK_TO_END);
rOle1.WriteUInt32(rOle2.Tell());
// Write the actual native data.
rOle2.Seek(0);
rOle1.WriteStream(rOle2);
return aClassName;
}
}
namespace SwReqIfReader
{
bool ExtractOleFromRtf(SvStream& rRtf, SvStream& rOle)
{
// Add missing header/footer.
SvMemoryStream aRtf;
aRtf.WriteOString("{\\rtf1");
aRtf.WriteStream(rRtf);
aRtf.WriteOString("}");
aRtf.Seek(0);
// Read the RTF markup.
tools::SvRef<ReqIfRtfReader> xReader(new ReqIfRtfReader(aRtf));
SvParserState eState = xReader->CallParser();
if (eState == SvParserState::Error)
return false;
// Write the OLE2 data.
return xReader->WriteObjectData(rOle);
}
bool WrapOleInRtf(SvStream& rOle2, SvStream& rRtf)
{
sal_uInt64 nPos = rOle2.Tell();
comphelper::ScopeGuard g([&rOle2, nPos] { rOle2.Seek(nPos); });
// Write OLE1 header, then the RTF wrapper.
SvMemoryStream aOLE1;
OString aClassName = InsertOLE1Header(rOle2, aOLE1);
// Start object.
rRtf.WriteCharPtr("{" OOO_STRING_SVTOOLS_RTF_OBJECT);
rRtf.WriteCharPtr(OOO_STRING_SVTOOLS_RTF_OBJEMB);
// Start objclass.
rRtf.WriteCharPtr("{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_OBJCLASS " ");
rRtf.WriteOString(aClassName);
// End objclass.
rRtf.WriteCharPtr("}");
// Start objdata.
rRtf.WriteCharPtr(
"{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_OBJDATA SAL_NEWLINE_STRING);
msfilter::rtfutil::WriteHex(static_cast<const sal_uInt8*>(aOLE1.GetData()), aOLE1.GetSize(),
&rRtf);
// End objdata.
rRtf.WriteCharPtr("}");
// End object.
rRtf.WriteCharPtr("}");
return true;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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