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596 | /* -*- 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 <cppuhelper/factory.hxx>
#include <cppuhelper/implbase.hxx>
#include <sax/tools/documenthandleradapter.hxx>
#include <osl/diagnose.h>
#include <osl/time.h>
#include <osl/conditn.hxx>
#include <tools/urlobj.hxx>
#include <tools/diagnose_ex.h>
#include <sal/log.hxx>
#include <comphelper/interaction.hxx>
#include <comphelper/processfactory.hxx>
#include <com/sun/star/lang/EventObject.hpp>
#include <com/sun/star/lang/XSingleServiceFactory.hpp>
#include <com/sun/star/uno/Any.hxx>
#include <com/sun/star/beans/PropertyValue.hpp>
#include <com/sun/star/xml/sax/Parser.hpp>
#include <com/sun/star/xml/sax/InputSource.hpp>
#include <com/sun/star/xml/sax/XDocumentHandler.hpp>
#include <com/sun/star/xml/sax/XExtendedDocumentHandler.hpp>
#include <com/sun/star/xml/sax/XFastParser.hpp>
#include <com/sun/star/xml/sax/Writer.hpp>
#include <com/sun/star/xml/XImportFilter.hpp>
#include <com/sun/star/xml/XExportFilter.hpp>
#include <com/sun/star/util/theMacroExpander.hpp>
#include <com/sun/star/io/Pipe.hpp>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/io/XOutputStream.hpp>
#include <com/sun/star/io/XActiveDataSource.hpp>
#include <com/sun/star/io/XSeekable.hpp>
#include <com/sun/star/io/XStreamListener.hpp>
#include <com/sun/star/util/PathSubstitution.hpp>
#include <com/sun/star/util/XStringSubstitution.hpp>
#include <com/sun/star/beans/NamedValue.hpp>
#include <com/sun/star/task/XInteractionHandler.hpp>
#include <com/sun/star/task/XInteractionRequest.hpp>
#include <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
#include <com/sun/star/xml/xslt/XSLT2Transformer.hpp>
#include <com/sun/star/xml/xslt/XSLTTransformer.hpp>
#include "LibXSLTTransformer.hxx"
#define TRANSFORMATION_TIMEOUT_SEC 60
using namespace ::cppu;
using namespace ::osl;
using namespace ::sax;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::io;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::registry;
using namespace ::com::sun::star::xml;
using namespace ::com::sun::star::xml::sax;
using namespace ::com::sun::star::util;
using namespace ::com::sun::star::task;
namespace XSLT
{
namespace {
/*
* XSLTFilter reads flat XML streams from the XML filter framework and passes
* them to an XSLT transformation service. XSLT transformation errors are
* reported to XSLTFilter.
*
* Currently, our transformation service is libxslt based, so it
* only supports XSLT 1.0. There is a possibility to use XSLT 2.0
* supporting service from an extension for a specific filter; the
* service must support com.sun.star.xml.xslt.XSLT2Transformer.
*/
class XSLTFilter : public WeakImplHelper<XImportFilter, XExportFilter,
XStreamListener, ExtendedDocumentHandlerAdapter>
{
private:
// the UNO ServiceFactory
css::uno::Reference<XComponentContext> m_xContext;
// DocumentHandler interface of the css::xml::sax::Writer service
css::uno::Reference<XOutputStream> m_rOutputStream;
css::uno::Reference<xslt::XXSLTTransformer> m_tcontrol;
osl::Condition m_cTransformed;
bool m_bTerminated;
bool m_bError;
OUString m_aExportBaseUrl;
OUString
rel2abs(const OUString&);
OUString
expandUrl(const OUString&);
css::uno::Reference<xslt::XXSLTTransformer> impl_createTransformer(const OUString& rTransformer, const Sequence<Any>& rArgs);
public:
// ctor...
explicit XSLTFilter(const css::uno::Reference<XComponentContext> &r);
// XStreamListener
virtual void SAL_CALL
error(const Any& a) override;
virtual void SAL_CALL
closed() override;
virtual void SAL_CALL
terminated() override;
virtual void SAL_CALL
started() override;
virtual void SAL_CALL
disposing(const EventObject& e) override;
// XImportFilter
virtual sal_Bool SAL_CALL
importer(const Sequence<PropertyValue>& aSourceData, const css::uno::Reference<
XDocumentHandler>& xHandler,
const Sequence<OUString>& msUserData) override;
// XExportFilter
virtual sal_Bool SAL_CALL
exporter(const Sequence<PropertyValue>& aSourceData, const Sequence<
OUString>& msUserData) override;
// XDocumentHandler
virtual void SAL_CALL
startDocument() override;
virtual void SAL_CALL
endDocument() override;
};
}
XSLTFilter::XSLTFilter(const css::uno::Reference<XComponentContext> &r):
m_xContext(r), m_bTerminated(false), m_bError(false)
{}
void
XSLTFilter::disposing(const EventObject&)
{
}
OUString
XSLTFilter::expandUrl(const OUString& sUrl)
{
OUString sExpandedUrl;
try
{
css::uno::Reference<XMacroExpander>
xMacroExpander = theMacroExpander::get(m_xContext);
sExpandedUrl = xMacroExpander->expandMacros(sUrl);
sal_Int32 nPos = sExpandedUrl.indexOf( "vnd.sun.star.expand:" );
if (nPos != -1)
sExpandedUrl = sExpandedUrl.copy(nPos + 20);
}
catch (const Exception&)
{
}
return sExpandedUrl;
}
css::uno::Reference<xslt::XXSLTTransformer>
XSLTFilter::impl_createTransformer(const OUString& rTransformer, const Sequence<Any>& rArgs)
{
css::uno::Reference<xslt::XXSLTTransformer> xTransformer;
// check if the filter needs XSLT-2.0-capable transformer
// COMPATIBILITY: libreoffice 3.5/3.6 used to save the impl.
// name of the XSLT 2.0 transformation service there, so check
// for that too (it is sufficient to check that there is _a_
// service name there)
if (rTransformer.toBoolean() || rTransformer.startsWith("com.sun."))
{
try
{
xTransformer = xslt::XSLT2Transformer::create(m_xContext, rArgs);
}
catch (const Exception&)
{
// TODO: put a dialog telling about the need to install
// xslt2-transformer extension here
SAL_WARN("filter.xslt", "could not create XSLT 2.0 transformer");
throw;
}
}
// instantiation of XSLT 2.0 transformer service failed, or the
// filter does not need it
if (!xTransformer.is())
{
xTransformer = xslt::XSLTTransformer::create(m_xContext, rArgs);
}
return xTransformer;
}
void
XSLTFilter::started()
{
m_cTransformed.reset();
}
void
XSLTFilter::error(const Any& a)
{
SAL_WARN("filter.xslt", "XSLTFilter::error was called: " << exceptionToString(a));
m_bError = true;
m_cTransformed.set();
}
void
XSLTFilter::closed()
{
m_cTransformed.set();
}
void
XSLTFilter::terminated()
{
m_bTerminated = true;
m_cTransformed.set();
}
OUString
XSLTFilter::rel2abs(const OUString& s)
{
css::uno::Reference<XStringSubstitution>
subs(css::util::PathSubstitution::create(m_xContext));
OUString aWorkingDir(subs->getSubstituteVariableValue( "$(progurl)" ));
INetURLObject aObj(aWorkingDir);
aObj.setFinalSlash();
bool bWasAbsolute;
INetURLObject aURL = aObj.smartRel2Abs(s, bWasAbsolute, false,
INetURLObject::EncodeMechanism::WasEncoded, RTL_TEXTENCODING_UTF8, true);
return aURL.GetMainURL(INetURLObject::DecodeMechanism::NONE);
}
sal_Bool
XSLTFilter::importer(const Sequence<PropertyValue>& aSourceData,
const css::uno::Reference<XDocumentHandler>& xHandler, const Sequence<
OUString>& msUserData)
{
if (msUserData.getLength() < 5)
return false;
OUString udStyleSheet = rel2abs(msUserData[4]);
// get information from media descriptor
// the input stream that represents the imported file
// is most important here since we need to supply it to
// the sax parser that drives the supplied document handler
sal_Int32 nLength = aSourceData.getLength();
OUString aName, aURL;
css::uno::Reference<XInputStream> xInputStream;
css::uno::Reference<XInteractionHandler> xInterActionHandler;
for (sal_Int32 i = 0; i < nLength; i++)
{
aName = aSourceData[i].Name;
Any value = aSourceData[i].Value;
if ( aName == "InputStream" )
value >>= xInputStream;
else if ( aName == "URL" )
value >>= aURL;
else if ( aName == "InteractionHandler" )
value >>= xInterActionHandler;
}
OSL_ASSERT(xInputStream.is());
if (!xInputStream.is())
return false;
// create SAX parser that will read the document file
// and provide events to xHandler passed to this call
css::uno::Reference<XParser> xSaxParser = Parser::create(m_xContext);
// create transformer
Sequence<Any> args(3);
NamedValue nv;
nv.Name = "StylesheetURL";
nv.Value <<= expandUrl(udStyleSheet);
args[0] <<= nv;
nv.Name = "SourceURL";
nv.Value <<= aURL;
args[1] <<= nv;
nv.Name = "SourceBaseURL";
nv.Value <<= INetURLObject(aURL).getBase();
args[2] <<= nv;
m_tcontrol = impl_createTransformer(msUserData[1], args);
OSL_ASSERT(xHandler.is());
OSL_ASSERT(xInputStream.is());
OSL_ASSERT(m_tcontrol.is());
if (xHandler.is() && xInputStream.is() && m_tcontrol.is())
{
try
{
css::uno::Reference<css::io::XSeekable> xSeek(xInputStream, UNO_QUERY);
if (xSeek.is())
xSeek->seek(0);
// we want to be notified when the processing is done...
m_tcontrol->addListener(css::uno::Reference<XStreamListener> (
this));
// connect input to transformer
m_tcontrol->setInputStream(xInputStream);
// create pipe
css::uno::Reference<XOutputStream> pipeout =
Pipe::create(m_xContext);
css::uno::Reference<XInputStream> pipein(pipeout, UNO_QUERY);
//connect transformer to pipe
m_tcontrol->setOutputStream(pipeout);
// connect pipe to sax parser
InputSource aInput;
aInput.sSystemId = aURL;
aInput.sPublicId = aURL;
aInput.aInputStream = pipein;
// set doc handler
xSaxParser->setDocumentHandler(xHandler);
css::uno::Reference< css::xml::sax::XFastParser > xFastParser = dynamic_cast<
css::xml::sax::XFastParser* >( xHandler.get() );
// transform
m_tcontrol->start();
TimeValue timeout = { TRANSFORMATION_TIMEOUT_SEC, 0};
osl::Condition::Result result(m_cTransformed.wait(&timeout));
while (osl::Condition::result_timeout == result) {
if (xInterActionHandler.is()) {
Sequence<Any> excArgs(0);
css::ucb::InteractiveAugmentedIOException exc(
"Timeout!",
static_cast< OWeakObject * >( this ),
InteractionClassification_ERROR,
css::ucb::IOErrorCode_GENERAL,
excArgs);
Any r;
r <<= exc;
::comphelper::OInteractionRequest* pRequest = new ::comphelper::OInteractionRequest(r);
css::uno::Reference< XInteractionRequest > xRequest(pRequest);
::comphelper::OInteractionRetry* pRetry = new ::comphelper::OInteractionRetry;
::comphelper::OInteractionAbort* pAbort = new ::comphelper::OInteractionAbort;
pRequest->addContinuation(pRetry);
pRequest->addContinuation(pAbort);
xInterActionHandler->handle(xRequest);
if (pAbort->wasSelected()) {
m_bError = true;
m_cTransformed.set();
}
}
result = m_cTransformed.wait(&timeout);
};
if (!m_bError) {
if( xFastParser.is() )
xFastParser->parseStream( aInput );
else
xSaxParser->parseStream( aInput );
}
m_tcontrol->terminate();
return !m_bError;
}
catch( const Exception& )
{
// something went wrong
TOOLS_WARN_EXCEPTION("filter.xslt", "");
return false;
}
}
else
{
return false;
}
}
sal_Bool
XSLTFilter::exporter(const Sequence<PropertyValue>& aSourceData,
const Sequence<OUString>& msUserData)
{
if (msUserData.getLength() < 6)
return false;
// get interesting values from user data
OUString udStyleSheet = rel2abs(msUserData[5]);
// read source data
// we are especially interested in the output stream
// since that is where our xml-writer will push the data
// from its data-source interface
OUString aName, sURL;
OUString aDoctypePublic;
// css::uno::Reference<XOutputStream> rOutputStream;
sal_Int32 nLength = aSourceData.getLength();
for (sal_Int32 i = 0; i < nLength; i++)
{
aName = aSourceData[i].Name;
if ( aName == "DocType_Public" )
aSourceData[i].Value >>= aDoctypePublic;
else if ( aName == "OutputStream" )
aSourceData[i].Value >>= m_rOutputStream;
else if ( aName == "URL" )
aSourceData[i].Value >>= sURL;
}
if (!getDelegate().is())
{
// get the document writer
setDelegate(css::uno::Reference<XExtendedDocumentHandler>(
Writer::create(m_xContext),
UNO_QUERY_THROW));
}
// create transformer
Sequence<Any> args(4);
NamedValue nv;
nv.Name = "StylesheetURL";
nv.Value <<= expandUrl(udStyleSheet);
args[0] <<= nv;
nv.Name = "TargetURL";
nv.Value <<= sURL;
args[1] <<= nv;
nv.Name = "DoctypePublic";
nv.Value <<= aDoctypePublic;
args[2] <<= nv;
nv.Name = "TargetBaseURL";
INetURLObject ineturl(sURL);
ineturl.removeSegment();
m_aExportBaseUrl = ineturl.GetMainURL(INetURLObject::DecodeMechanism::NONE);
nv.Value <<= m_aExportBaseUrl;
args[3] <<= nv;
m_tcontrol = impl_createTransformer(msUserData[1], args);
OSL_ASSERT(m_rOutputStream.is());
OSL_ASSERT(m_tcontrol.is());
if (m_tcontrol.is() && m_rOutputStream.is())
{
// we want to be notified when the processing is done...
m_tcontrol->addListener(css::uno::Reference<XStreamListener> (this));
// create pipe
css::uno::Reference<XOutputStream> pipeout =
Pipe::create(m_xContext);
css::uno::Reference<XInputStream> pipein(pipeout, UNO_QUERY);
// connect sax writer to pipe
css::uno::Reference<XActiveDataSource> xmlsource(getDelegate(),
UNO_QUERY);
xmlsource->setOutputStream(pipeout);
// connect pipe to transformer
m_tcontrol->setInputStream(pipein);
// connect transformer to output
m_tcontrol->setOutputStream(m_rOutputStream);
// we will start receiving events after returning 'true'.
// we will start the transformation as soon as we receive the startDocument
// event.
return true;
}
else
{
return false;
}
}
// for the DocumentHandler implementation, we just proxy the
// events to the XML writer that we created upon the output stream
// that was provided by the XMLFilterAdapter
void
XSLTFilter::startDocument()
{
ExtendedDocumentHandlerAdapter::startDocument();
m_tcontrol->start();
}
void
XSLTFilter::endDocument()
{
ExtendedDocumentHandlerAdapter::endDocument();
// wait for the transformer to finish
m_cTransformed.wait();
m_tcontrol->terminate();
if (m_bError || m_bTerminated)
throw RuntimeException();
}
// Component management
#define FILTER_SERVICE_NAME "com.sun.star.documentconversion.XSLTFilter"
#define FILTER_IMPL_NAME "com.sun.star.comp.documentconversion.XSLTFilter"
#define TRANSFORMER_SERVICE_NAME "com.sun.star.xml.xslt.XSLTTransformer"
#define TRANSFORMER_IMPL_NAME "com.sun.star.comp.documentconversion.LibXSLTTransformer"
static css::uno::Reference<XInterface>
CreateTransformerInstance(const css::uno::Reference<XMultiServiceFactory> &r)
{
return css::uno::Reference<XInterface> (static_cast<OWeakObject *>(new LibXSLTTransformer( comphelper::getComponentContext(r) )));
}
static css::uno::Reference<XInterface>
CreateFilterInstance(const css::uno::Reference<XMultiServiceFactory> &r)
{
return css::uno::Reference<XInterface> (static_cast<OWeakObject *>(new XSLTFilter( comphelper::getComponentContext(r) )));
}
}
using namespace XSLT;
extern "C"
{
SAL_DLLPUBLIC_EXPORT void * xsltfilter_component_getFactory(const char * pImplName,<--- The function 'xsltfilter_component_getFactory' is never used.
void * pServiceManager, void * /* pRegistryKey */)
{
void * pRet = nullptr;
if (pServiceManager)
{
if (rtl_str_compare(pImplName, FILTER_IMPL_NAME) == 0)
{
Sequence<OUString> serviceNames { FILTER_SERVICE_NAME };
css::uno::Reference<XSingleServiceFactory>
xFactory(
createSingleFactory(
static_cast<XMultiServiceFactory *> (pServiceManager),
OUString::createFromAscii(
pImplName),
CreateFilterInstance,
serviceNames));
if (xFactory.is())
{
xFactory->acquire();
pRet = xFactory.get();
}
}
else if (rtl_str_compare(pImplName, TRANSFORMER_IMPL_NAME) == 0)
{
Sequence<OUString> serviceNames { TRANSFORMER_SERVICE_NAME };
css::uno::Reference<XSingleServiceFactory>
xFactory(
createSingleFactory(
static_cast<XMultiServiceFactory *> (pServiceManager),
OUString::createFromAscii(
pImplName),
CreateTransformerInstance,
serviceNames));
if (xFactory.is())
{
xFactory->acquire();
pRet = xFactory.get();
}
}
}
return pRet;
}
} // extern "C"
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|