diff options
Diffstat (limited to 'sc/source/ui')
| -rw-r--r-- | sc/source/ui/unoobj/exceldetect.cxx | 41 |
1 files changed, 39 insertions, 2 deletions
diff --git a/sc/source/ui/unoobj/exceldetect.cxx b/sc/source/ui/unoobj/exceldetect.cxx index 2e0eae259a96..4119b1d6592b 100644 --- a/sc/source/ui/unoobj/exceldetect.cxx +++ b/sc/source/ui/unoobj/exceldetect.cxx @@ -74,6 +74,41 @@ bool hasStream(const uno::Reference<io::XInputStream>& xInStream, const OUString return xStorage->IsStream(rName); } +bool isExcel40(const uno::Reference<io::XInputStream>& xInStream) +{ + SfxMedium aMedium; + aMedium.UseInteractionHandler(true); + 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; + + if (nBofId != 0x0409) + // This ID signifies Excel 4.0 format. It must be 0x0409. + return false; + + if (nBofSize < 4 || 16 < nBofSize) + // BOF record must be sized between 4 and 16 for Excel 4.0 stream. + 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; @@ -131,9 +166,11 @@ OUString ScExcelBiffDetect::detect( uno::Sequence<beans::PropertyValue>& lDescri 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(); - // TODO: Implement this. - return OUString(); + aMediaDesc[MediaDescriptor::PROP_FILTERNAME()] <<= isTemplate(aType) ? OUString("MS Excel 4.0 Vorlage/Template") : OUString("MS Excel 4.0"); + return aType; } // failed! |