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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: olehelper.cxx,v $
* $Revision: 1.1 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "oox/ole/olehelper.hxx"
#include <rtl/ustrbuf.hxx>
#include "oox/helper/binaryinputstream.hxx"
using ::rtl::OUString;
using ::rtl::OUStringBuffer;
namespace oox {
namespace ole {
// ============================================================================
namespace {
const sal_Char* const OLE_GUID_STDPIC = "{0BE35204-8F91-11CE-9DE3-00AA004BB851}";
const sal_Char* const OLE_GUID_STDHLINK = "{79EAC9D0-BAF9-11CE-8C82-00AA004BA90B}";
const sal_Char* const OLE_GUID_URLMONIKER = "{79EAC9E0-BAF9-11CE-8C82-00AA004BA90B}";
const sal_Char* const OLE_GUID_FILEMONIKER = "{00000303-0000-0000-C000-000000000046}";
const sal_uInt32 OLE_STDPIC_ID = 0x0000746C;
const sal_uInt32 OLE_STDHLINK_VERSION = 2;
const sal_uInt32 OLE_STDHLINK_HASTARGET = 0x00000001; /// Has hyperlink moniker.
const sal_uInt32 OLE_STDHLINK_ABSOLUTE = 0x00000002; /// Absolute path.
const sal_uInt32 OLE_STDHLINK_HASLOCATION = 0x00000008; /// Has target location.
const sal_uInt32 OLE_STDHLINK_HASDISPLAY = 0x00000010; /// Has display string.
const sal_uInt32 OLE_STDHLINK_HASGUID = 0x00000020; /// Has identification GUID.
const sal_uInt32 OLE_STDHLINK_HASTIME = 0x00000040; /// Has creation time.
const sal_uInt32 OLE_STDHLINK_HASFRAME = 0x00000080; /// Has frame.
const sal_uInt32 OLE_STDHLINK_ASSTRING = 0x00000100; /// Hyperlink as simple string.
// ----------------------------------------------------------------------------
template< typename Type >
void lclAppendHex( OUStringBuffer& orBuffer, Type nValue )
{
const sal_Int32 nWidth = 2 * sizeof( Type );
static const sal_Unicode spcHexChars[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
orBuffer.setLength( orBuffer.getLength() + nWidth );
for( sal_Int32 nCharIdx = orBuffer.getLength() - 1, nCharEnd = nCharIdx - nWidth; nCharIdx > nCharEnd; --nCharIdx, nValue >>= 4 )
orBuffer.setCharAt( nCharIdx, spcHexChars[ nValue & 0xF ] );
}
OUString lclReadStdHlinkString( BinaryInputStream& rInStrm, rtl_TextEncoding eTextEnc, bool bUnicode )
{
OUString aRet;
sal_Int32 nChars = rInStrm.readInt32();
if( nChars > 0 )
{
sal_Int32 nReadChars = getLimitedValue< sal_Int32, sal_Int32 >( nChars, 0, SAL_MAX_UINT16 );
aRet = bUnicode ? rInStrm.readUnicodeArray( nReadChars, true ) : rInStrm.readCharArrayUC( nReadChars, eTextEnc, true );
// strings are NUL terminated, remove trailing NUL and possible other garbage
sal_Int32 nNulPos = aRet.indexOf( '\0' );
if( nNulPos >= 0 )
aRet = aRet.copy( 0, nNulPos );
// skip remaining chars
rInStrm.skip( (bUnicode ? 2 : 1) * (nChars - nReadChars) );
}
return aRet;
}
} // namespace
// ============================================================================
/*static*/ OUString OleHelper::importGuid( BinaryInputStream& rInStrm )
{
OUStringBuffer aBuffer;
aBuffer.append( sal_Unicode( '{' ) );
lclAppendHex( aBuffer, rInStrm.readuInt32() );
aBuffer.append( sal_Unicode( '-' ) );
lclAppendHex( aBuffer, rInStrm.readuInt16() );
aBuffer.append( sal_Unicode( '-' ) );
lclAppendHex( aBuffer, rInStrm.readuInt16() );
aBuffer.append( sal_Unicode( '-' ) );
lclAppendHex( aBuffer, rInStrm.readuInt8() );
lclAppendHex( aBuffer, rInStrm.readuInt8() );
aBuffer.append( sal_Unicode( '-' ) );
for( int nIndex = 0; nIndex < 6; ++nIndex )
lclAppendHex( aBuffer, rInStrm.readuInt8() );
aBuffer.append( sal_Unicode( '}' ) );
return aBuffer.makeStringAndClear();
}
/*static*/ bool OleHelper::importStdPic( StreamDataSequence& orGraphicData, BinaryInputStream& rInStrm, bool bWithGuid )
{
if( bWithGuid )
{
bool bIsStdPic = importGuid( rInStrm ).equalsAscii( OLE_GUID_STDPIC );
OSL_ENSURE( bIsStdPic, "OleHelper::importStdPic - unexpected header GUID, expected StdPic" );
if( !bIsStdPic )
return false;
}
sal_uInt32 nStdPicId;
sal_Int32 nBytes;
rInStrm >> nStdPicId >> nBytes;
OSL_ENSURE( nStdPicId == OLE_STDPIC_ID, "OleHelper::importStdPic - unexpected header version" );
return !rInStrm.isEof() && (nStdPicId == OLE_STDPIC_ID) && (nBytes > 0) && (rInStrm.readData( orGraphicData, nBytes ) == nBytes);
}
/*static*/ bool OleHelper::importStdHlink( StdHlinkInfo& orHlinkInfo, BinaryInputStream& rInStrm, rtl_TextEncoding eTextEnc, bool bWithGuid )
{
if( bWithGuid )
{
bool bIsStdHlink = importGuid( rInStrm ).equalsAscii( OLE_GUID_STDHLINK );
OSL_ENSURE( bIsStdHlink, "OleHelper::importStdHlink - unexpected header GUID, expected StdHlink" );
if( !bIsStdHlink )
return false;
}
sal_uInt32 nVersion, nFlags;
rInStrm >> nVersion >> nFlags;
OSL_ENSURE( nVersion == OLE_STDHLINK_VERSION, "OleHelper::importStdHlink - unexpected header version" );
if( rInStrm.isEof() || (nVersion != OLE_STDHLINK_VERSION) )
return false;
// display string
if( getFlag( nFlags, OLE_STDHLINK_HASDISPLAY ) )
orHlinkInfo.maDisplay = lclReadStdHlinkString( rInStrm, eTextEnc, true );
// frame string
if( getFlag( nFlags, OLE_STDHLINK_HASFRAME ) )
orHlinkInfo.maFrame = lclReadStdHlinkString( rInStrm, eTextEnc, true );
// target
if( getFlag( nFlags, OLE_STDHLINK_HASTARGET ) )
{
if( getFlag( nFlags, OLE_STDHLINK_ASSTRING ) )
{
OSL_ENSURE( getFlag( nFlags, OLE_STDHLINK_ABSOLUTE ), "OleHelper::importStdHlink - link not absolute" );
orHlinkInfo.maTarget = lclReadStdHlinkString( rInStrm, eTextEnc, true );
}
else // hyperlink moniker
{
OUString aGuid = importGuid( rInStrm );
if( aGuid.equalsAscii( OLE_GUID_FILEMONIKER ) )
{
// file name, maybe relative and with directory up-count
sal_Int16 nUpLevels;
rInStrm >> nUpLevels;
OSL_ENSURE( (nUpLevels == 0) || !getFlag( nFlags, OLE_STDHLINK_ABSOLUTE ), "OleHelper::importStdHlink - absolute filename with upcount" );
orHlinkInfo.maTarget = lclReadStdHlinkString( rInStrm, eTextEnc, false );
rInStrm.skip( 24 );
sal_Int32 nBytes = rInStrm.readInt32();
if( nBytes > 0 )
{
sal_Int64 nEndPos = rInStrm.tell() + ::std::max< sal_Int32 >( nBytes, 0 );
sal_uInt16 nChars = getLimitedValue< sal_uInt16, sal_Int32 >( rInStrm.readInt32() / 2, 0, SAL_MAX_UINT16 );
rInStrm.skip( 2 ); // key value
orHlinkInfo.maTarget = rInStrm.readUnicodeArray( nChars ); // NOT null terminated
rInStrm.seek( nEndPos );
}
if( !getFlag( nFlags, OLE_STDHLINK_ABSOLUTE ) )
for( sal_Int16 nLevel = 0; nLevel < nUpLevels; ++nLevel )
orHlinkInfo.maTarget = CREATE_OUSTRING( "../" ) + orHlinkInfo.maTarget;
}
else if( aGuid.equalsAscii( OLE_GUID_URLMONIKER ) )
{
// URL, maybe relative and with leading '../'
sal_Int32 nBytes = rInStrm.readInt32();
sal_Int64 nEndPos = rInStrm.tell() + ::std::max< sal_Int32 >( nBytes, 0 );
orHlinkInfo.maTarget = rInStrm.readNulUnicodeArray();
rInStrm.seek( nEndPos );
}
else
{
OSL_ENSURE( false, "OleHelper::importStdHlink - unsupported hyperlink moniker" );
return false;
}
}
}
// target location
if( getFlag( nFlags, OLE_STDHLINK_HASLOCATION ) )
orHlinkInfo.maLocation = lclReadStdHlinkString( rInStrm, eTextEnc, true );
return true;
}
// ============================================================================
} // namespace ole
} // namespace oox
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