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Diffstat (limited to 'sw/source/ui/uno/swdetect.cxx')
| -rw-r--r-- | sw/source/ui/uno/swdetect.cxx | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/sw/source/ui/uno/swdetect.cxx b/sw/source/ui/uno/swdetect.cxx new file mode 100644 index 000000000..83b7162ae --- /dev/null +++ b/sw/source/ui/uno/swdetect.cxx @@ -0,0 +1,171 @@ +/* -*- 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 "swdetect.hxx" + +#include <cppuhelper/supportsservice.hxx> +#include <com/sun/star/io/XInputStream.hpp> +#include <com/sun/star/uno/XComponentContext.hpp> +#include <sfx2/docfile.hxx> +#include <sot/storage.hxx> +#include <tools/urlobj.hxx> +#include <unotools/mediadescriptor.hxx> + +using namespace ::com::sun::star; +using namespace ::com::sun::star::uno; +using namespace ::com::sun::star::io; +using namespace ::com::sun::star::task; +using namespace ::com::sun::star::beans; +using namespace ::com::sun::star::lang; +using utl::MediaDescriptor; + +SwFilterDetect::SwFilterDetect() +{ +} + +SwFilterDetect::~SwFilterDetect() +{ +} + +OUString SAL_CALL SwFilterDetect::detect( Sequence< PropertyValue >& lDescriptor ) +{ + MediaDescriptor aMediaDesc( lDescriptor ); + OUString aTypeName = aMediaDesc.getUnpackedValueOrDefault( MediaDescriptor::PROP_TYPENAME, OUString() ); + uno::Reference< io::XInputStream > xInStream ( aMediaDesc[MediaDescriptor::PROP_INPUTSTREAM], uno::UNO_QUERY ); + if ( !xInStream.is() ) + return OUString(); + + SfxMedium aMedium; + aMedium.UseInteractionHandler( false ); + aMedium.setStreamToLoadFrom( xInStream, true ); + + SvStream *pInStrm = aMedium.GetInStream(); + if ( !pInStrm || pInStrm->GetError() ) + return OUString(); + + bool bIsDetected = false; + + if ( aTypeName == "writer_Rich_Text_Format" ) + { + pInStrm->Seek( STREAM_SEEK_TO_BEGIN ); + bIsDetected = ( read_uInt8s_ToOString( *pInStrm, 5 ) == "{\\rtf" ); + } + else if ( aTypeName == "writer_MS_WinWord_5" ) + { + pInStrm->Seek( STREAM_SEEK_TO_BEGIN ); + const sal_uInt8 nBufSize = 3; + sal_uInt8 nBuffer[ nBufSize ]; + if (pInStrm->ReadBytes(nBuffer, nBufSize) < nBufSize) + return OUString(); + + bIsDetected = (nBuffer[0] == 0x9B && nBuffer[1] == 0xA5 && nBuffer[2] == 0x21) // WinWord 1 + || (nBuffer[0] == 0x9C && nBuffer[1] == 0xA5 && nBuffer[2] == 0x21) // PMWord 1 + || (nBuffer[0] == 0xDB && nBuffer[1] == 0xA5 && nBuffer[2] == 0x2D) // WinWord 2 + || (nBuffer[0] == 0xDC && nBuffer[1] == 0xA5 && nBuffer[2] == 0x65); // WinWord 6.0/95, as a single stream file + } + else + { + // Do not attempt to create an SotStorage on a + // 0-length stream as that would create the compound + // document header on the stream and effectively write to + // disk! + pInStrm->Seek( STREAM_SEEK_TO_BEGIN ); + if ( pInStrm->remainingSize() == 0 ) + return OUString(); + + try + { + tools::SvRef<SotStorage> aStorage = new SotStorage ( pInStrm, false ); + if ( !aStorage->GetError() ) + { + bIsDetected = aStorage->IsContained( "WordDocument" ); + if ( bIsDetected && aTypeName.startsWith( "writer_MS_Word_97" ) ) + { + bIsDetected = ( aStorage->IsContained("0Table") || aStorage->IsContained("1Table") ); + + // If we are checking the template type, and the document is not a .dot, don't + // mis-detect it. + if ( bIsDetected && aTypeName == "writer_MS_Word_97_Vorlage" ) + { + // It is common practice to rename a .doc to .dot to make it a template. + // Since we have detected a.doc-ish format, always accept .dot-named-files + // as valid templates to avoid flagging this as an invalid .dot format.. + INetURLObject aParser(aMediaDesc.getUnpackedValueOrDefault( + utl::MediaDescriptor::PROP_URL, OUString())); + + // Super ugly hack, but we don't want to use the whole WW8Fib thing here in + // the swd library, apparently. We know (do we?) that the "aBits1" byte, as + // the variable is called in WW8Fib::WW8Fib(SvStream&,sal_uInt8,sal_uInt32), + // is at offset 10 in the WordDocument stream. The fDot bit is bit 0x01 of + // that byte. + if (aParser.getExtension().toAsciiLowerCase() != "dot") + { + tools::SvRef<SotStorageStream> xWordDocument + = aStorage->OpenSotStream("WordDocument", StreamMode::STD_READ); + xWordDocument->Seek(10); + if (xWordDocument->Tell() == 10) + { + sal_uInt8 aBits1; + xWordDocument->ReadUChar(aBits1); + // Check fDot bit + bIsDetected = ((aBits1 & 0x01) == 0x01); + } + } + } + } + } + } + catch (...) + { + bIsDetected = false; + } + } + + if ( bIsDetected ) + return aTypeName; + + return OUString(); +} + +/* XServiceInfo */ +OUString SAL_CALL SwFilterDetect::getImplementationName() +{ + return "com.sun.star.comp.writer.FormatDetector"; +} + +/* XServiceInfo */ +sal_Bool SAL_CALL SwFilterDetect::supportsService( const OUString& sServiceName ) +{ + return cppu::supportsService(this, sServiceName); +} + +/* XServiceInfo */ +Sequence< OUString > SAL_CALL SwFilterDetect::getSupportedServiceNames() +{ + return { "com.sun.star.frame.ExtendedTypeDetection", "com.sun.star.text.FormatDetector", "com.sun.star.text.W4WFormatDetector" }; +} + +extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface* +com_sun_star_comp_writer_FormatDetector_get_implementation(css::uno::XComponentContext*, + css::uno::Sequence<css::uno::Any> const &) +{ + return cppu::acquire(new SwFilterDetect()); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |