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Diffstat (limited to 'starmath/source/smdetect.cxx')
| -rw-r--r-- | starmath/source/smdetect.cxx | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/starmath/source/smdetect.cxx b/starmath/source/smdetect.cxx new file mode 100644 index 000000000..aa6280156 --- /dev/null +++ b/starmath/source/smdetect.cxx @@ -0,0 +1,149 @@ +/* -*- 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 "smdetect.hxx" +#include <cppuhelper/supportsservice.hxx> +#include <com/sun/star/io/XInputStream.hpp> +#include <com/sun/star/ucb/ContentCreationException.hpp> +#include <com/sun/star/uno/XComponentContext.hpp> +#include <sfx2/docfile.hxx> +#include <unotools/mediadescriptor.hxx> +#include <sal/log.hxx> +#include <sot/storage.hxx> +#include <tools/diagnose_ex.h> + +#include "eqnolefilehdr.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; + +SmFilterDetect::SmFilterDetect() +{ +} + +SmFilterDetect::~SmFilterDetect() +{ +} + +OUString SAL_CALL SmFilterDetect::detect( Sequence< PropertyValue >& lDescriptor ) +{ + MediaDescriptor aMediaDesc( lDescriptor ); + 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(); + + // 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(); + + bool bStorageOk = false; + try + { + tools::SvRef<SotStorage> aStorage = new SotStorage( pInStrm, false ); + bStorageOk = !aStorage->GetError(); + if (bStorageOk) + { + if ( aStorage->IsStream("Equation Native") ) + { + sal_uInt8 nVersion; + if ( GetMathTypeVersion( aStorage.get(), nVersion ) && nVersion <=3 ) + return "math_MathType_3x"; + } + } + } + catch (const css::ucb::ContentCreationException &) + { + TOOLS_WARN_EXCEPTION("starmath", "SmFilterDetect::detect caught" ); + } + + if (!bStorageOk) + { + // 200 should be enough for the XML + // version, encoding and !DOCTYPE + // stuff I hope? + static const sal_uInt16 nBufferSize = 200; + char aBuffer[nBufferSize+1]; + pInStrm->Seek( STREAM_SEEK_TO_BEGIN ); + pInStrm->StartReadingUnicodeText( RTL_TEXTENCODING_DONTKNOW ); // avoid BOM marker + auto nBytesRead = pInStrm->ReadBytes( aBuffer, nBufferSize ); + if (nBytesRead >= 6) + { + aBuffer[nBytesRead] = 0; + bool bIsMathType = false; + if (0 == strncmp( "<?xml", aBuffer, 5)) + bIsMathType = (strstr( aBuffer, "<math>" ) || + strstr( aBuffer, "<math " ) || + strstr( aBuffer, "<math:math " )); + else + // this is the old <math tag to MathML in the beginning of the XML file + bIsMathType = (0 == strncmp( "<math ", aBuffer, 6) || + 0 == strncmp( "<math> ", aBuffer, 7) || + 0 == strncmp( "<math:math> ", aBuffer, 12)); + + if ( bIsMathType ) + return "math_MathML_XML_Math"; + } + } + + return OUString(); +} + +/* XServiceInfo */ +OUString SAL_CALL SmFilterDetect::getImplementationName() +{ + return "com.sun.star.comp.math.FormatDetector"; +} + +/* XServiceInfo */ +sal_Bool SAL_CALL SmFilterDetect::supportsService( const OUString& sServiceName ) +{ + return cppu::supportsService(this, sServiceName); +} + +/* XServiceInfo */ +Sequence< OUString > SAL_CALL SmFilterDetect::getSupportedServiceNames() +{ + return { "com.sun.star.frame.ExtendedTypeDetection" }; +} + +extern "C" SAL_DLLPUBLIC_EXPORT uno::XInterface* +math_FormatDetector_get_implementation(uno::XComponentContext* /*pCtx*/, + uno::Sequence<uno::Any> const& /*rSeq*/) +{ + return cppu::acquire(new SmFilterDetect); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |