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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 "exceldetect.hxx"
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/ucb/XContent.hpp>
#include "svl/itemset.hxx"
#include "svl/eitem.hxx"
#include "sfx2/app.hxx"
#include "sfx2/docfile.hxx"
#include "sfx2/sfxsids.hrc"
#include "unotools/mediadescriptor.hxx"
#include "sot/storage.hxx"
using namespace com::sun::star;
using utl::MediaDescriptor;
ScExcelBiffDetect::ScExcelBiffDetect( const uno::Reference<uno::XComponentContext>& /*xContext*/ ) {}
ScExcelBiffDetect::~ScExcelBiffDetect() {}
OUString ScExcelBiffDetect::getImplementationName() throw (uno::RuntimeException)
{
return impl_getStaticImplementationName();
}
sal_Bool ScExcelBiffDetect::supportsService( const OUString& aName ) throw (uno::RuntimeException)
{
uno::Sequence<OUString> aSrvNames = getSupportedServiceNames();
const OUString* pArray = aSrvNames.getConstArray();
for (sal_Int32 i = 0; i < aSrvNames.getLength(); ++i, ++pArray)
{
if (*pArray == aName)
return true;
}
return false;
}
uno::Sequence<OUString> ScExcelBiffDetect::getSupportedServiceNames() throw (uno::RuntimeException)
{
return impl_getStaticSupportedServiceNames();
}
namespace {
bool hasStream(const uno::Reference<io::XInputStream>& xInStream, const OUString& rName)
{
SfxMedium aMedium;
aMedium.UseInteractionHandler(false);
aMedium.setStreamToLoadFrom(xInStream, true);
SvStream* pStream = aMedium.GetInStream();
if (!pStream)
return false;
pStream->Seek(STREAM_SEEK_TO_END);
sal_Size nSize = pStream->Tell();
pStream->Seek(0);
if (!nSize)
// 0-size stream. Failed.
return false;
SotStorageRef xStorage = new SotStorage(pStream, false);
if (!xStorage.Is() || xStorage->GetError())
return false;
return xStorage->IsStream(rName);
}
/**
* We detect BIFF 2, 3 and 4 file types together since the only thing that
* set them apart is the BOF ID.
*/
bool isExcel40(const uno::Reference<io::XInputStream>& xInStream)
{
SfxMedium aMedium;
aMedium.UseInteractionHandler(false);
aMedium.setStreamToLoadFrom(xInStream, true);
SvStream* pStream = aMedium.GetInStream();
if (!pStream)
return false;
pStream->Seek(STREAM_SEEK_TO_END);
sal_Size nSize = pStream->Tell();
pStream->Seek(0);
if (nSize < 4)
return false;
sal_uInt16 nBofId, nBofSize;
*pStream >> nBofId >> nBofSize;
switch (nBofId)
{
case 0x0009: // Excel 2.1 worksheet (BIFF 2)
case 0x0209: // Excel 3.0 worksheet (BIFF 3)
case 0x0409: // Excel 4.0 worksheet (BIFF 4)
case 0x0809: // Excel 5.0 worksheet (BIFF 5), some apps create such files (fdo#70100)
break;
default:
return false;
}
if (nBofSize < 4 || 16 < nBofSize)
// BOF record must be sized between 4 and 16 for BIFF 2, 3 and 4.
return false;
sal_Size nPos = pStream->Tell();
if (nSize - nPos < nBofSize)
// BOF record doesn't have required bytes.
return false;
return true;
}
bool isTemplate(const OUString& rType)
{
return rType.indexOf("_VorlageTemplate") != -1;
}
}
OUString ScExcelBiffDetect::detect( uno::Sequence<beans::PropertyValue>& lDescriptor )
throw (uno::RuntimeException)
{
MediaDescriptor aMediaDesc(lDescriptor);
OUString aType;
aMediaDesc[MediaDescriptor::PROP_TYPENAME()] >>= aType;
if (aType.isEmpty())
// Type is not given. We can't proceed.
return OUString();
aMediaDesc.addInputStream();
uno::Reference<io::XInputStream> xInStream(aMediaDesc[MediaDescriptor::PROP_INPUTSTREAM()], uno::UNO_QUERY);
if (!xInStream.is())
// No input stream.
return OUString();
if (aType == "calc_MS_Excel_97" || aType == "calc_MS_Excel_97_VorlageTemplate")
{
// See if this stream is a Excel 97/XP/2003 (BIFF8) stream.
if (!hasStream(xInStream, "Workbook"))
// BIFF8 is expected to contain a stream named "Workbook".
return OUString();
aMediaDesc[MediaDescriptor::PROP_FILTERNAME()] <<= isTemplate(aType) ? OUString("MS Excel 97 Vorlage/Template") : OUString("MS Excel 97");
return aType;
}
if (aType == "calc_MS_Excel_95" || aType == "calc_MS_Excel_95_VorlageTemplate")
{
// See if this stream is a Excel 95 (BIFF5) stream.
if (!hasStream(xInStream, "Book"))
return OUString();
aMediaDesc[MediaDescriptor::PROP_FILTERNAME()] <<= isTemplate(aType) ? OUString("MS Excel 95 Vorlage/Template") : OUString("MS Excel 95");
return aType;
}
if (aType == "calc_MS_Excel_5095" || aType == "calc_MS_Excel_5095_VorlageTemplate")
{
// See if this stream is a Excel 5.0/95 stream.
if (!hasStream(xInStream, "Book"))
return OUString();
aMediaDesc[MediaDescriptor::PROP_FILTERNAME()] <<= isTemplate(aType) ? OUString("MS Excel 5.0/95 Vorlage/Template") : OUString("MS Excel 5.0/95");
return aType;
}
if (aType == "calc_MS_Excel_40" || aType == "calc_MS_Excel_40_VorlageTemplate")
{
// See if this stream is a Excel 4.0 stream.
if (!isExcel40(xInStream))
return OUString();
aMediaDesc[MediaDescriptor::PROP_FILTERNAME()] <<= isTemplate(aType) ? OUString("MS Excel 4.0 Vorlage/Template") : OUString("MS Excel 4.0");
return aType;
}
// failed!
return OUString();
}
uno::Sequence<OUString> ScExcelBiffDetect::impl_getStaticSupportedServiceNames()
{
uno::Sequence<OUString> aNames(1);
aNames[0] = "com.sun.star.frame.ExtendedTypeDetection";
return aNames;
}
OUString ScExcelBiffDetect::impl_getStaticImplementationName()
{
return OUString("com.sun.star.comp.calc.ExcelBiffFormatDetector");
}
uno::Reference<uno::XInterface> ScExcelBiffDetect::impl_createInstance(
const uno::Reference<uno::XComponentContext>& xContext )
throw (com::sun::star::uno::Exception)
{
return static_cast<cppu::OWeakObject*>(new ScExcelBiffDetect(xContext));
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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