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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "precompiled_xmloff.hxx"
#include "RDFaExportHelper.hxx"
#include "xmlnmspe.hxx"
#include <xmloff/xmlexp.hxx>
#include <xmloff/xmltoken.hxx>
#include <comphelper/stlunosequence.hxx>
#include <comphelper/stl_types.hxx>
#include <com/sun/star/rdf/Statement.hpp>
#include <com/sun/star/rdf/URIs.hpp>
#include <com/sun/star/rdf/URI.hpp>
#include <com/sun/star/rdf/XLiteral.hpp>
#include <com/sun/star/rdf/XRepositorySupplier.hpp>
#include <com/sun/star/rdf/XDocumentRepository.hpp>
#include <rtl/ustrbuf.hxx>
#include <boost/bind.hpp>
#include <boost/iterator_adaptors.hpp>
#ifndef BOOST_ITERATOR_ADAPTOR_DWA053000_HPP_ // from iterator_adaptors.hpp
// N.B.: the check for the header guard _of a specific version of boost_
// is here so this may work on different versions of boost,
// which sadly put the goods in different header files
#include <boost/iterator/transform_iterator.hpp>
#endif
#include <functional>
#include <algorithm>
using namespace ::com::sun::star;
namespace xmloff {
static const char s_prefix [] = "_:b";
static ::rtl::OUString
makeCURIE(SvXMLExport * i_pExport,
uno::Reference<rdf::XURI> const & i_xURI)
{
OSL_ENSURE(i_xURI.is(), "makeCURIE: null URI");
if (!i_xURI.is()) throw uno::RuntimeException();
const ::rtl::OUString Namespace( i_xURI->getNamespace() );
OSL_ENSURE(Namespace.getLength(), "makeCURIE: no namespace");
if (!Namespace.getLength()) throw uno::RuntimeException();
::rtl::OUStringBuffer buf;
buf.append( i_pExport->EnsureNamespace(Namespace) );
buf.append( static_cast<sal_Unicode>(':') );
// N.B.: empty LocalName is valid!
buf.append( i_xURI->getLocalName() );
return buf.makeStringAndClear();
}
////////////////////////////////////////////////////////////////////////////
RDFaExportHelper::RDFaExportHelper(SvXMLExport & i_rExport)
: m_rExport(i_rExport), m_xRepository(0), m_Counter(0)
{
const uno::Reference<rdf::XRepositorySupplier> xRS( m_rExport.GetModel(),
uno::UNO_QUERY);
OSL_ENSURE(xRS.is(), "AddRDFa: model is no rdf::XRepositorySupplier");
if (!xRS.is()) throw uno::RuntimeException();
m_xRepository.set(xRS->getRDFRepository(), uno::UNO_QUERY_THROW);
const uno::Reference<rdf::XURI> xLabel(
rdf::URI::createKnown(m_rExport.GetComponentContext(),
rdf::URIs::RDFS_LABEL));
m_RDFsLabel = xLabel->getStringValue();
}
::rtl::OUString
RDFaExportHelper::LookupBlankNode(
uno::Reference<rdf::XBlankNode> const & i_xBlankNode)
{
OSL_ENSURE(i_xBlankNode.is(), "null BlankNode?");
if (!i_xBlankNode.is()) throw uno::RuntimeException();
::rtl::OUString & rEntry(
m_BlankNodeMap[ i_xBlankNode->getStringValue() ] );
if (!rEntry.getLength())
{
::rtl::OUStringBuffer buf;
buf.appendAscii(s_prefix);
buf.append(++m_Counter);
rEntry = buf.makeStringAndClear();
}
return rEntry;
}
////////////////////////////////////////////////////////////////////////////
void
RDFaExportHelper::AddRDFa(
uno::Reference<rdf::XMetadatable> const & i_xMetadatable)
{
try
{
uno::Sequence<rdf::Statement> stmts(
m_xRepository->getStatementRDFa(i_xMetadatable) );
if (0 == stmts.getLength())
{
return; // no RDFa
}
// all stmts have the same subject, so we only handle first one
const uno::Reference<rdf::XURI> xSubjectURI(stmts[0].Subject,
uno::UNO_QUERY);
const uno::Reference<rdf::XBlankNode> xSubjectBNode(stmts[0].Subject,
uno::UNO_QUERY);
if (!xSubjectURI.is() && !xSubjectBNode.is())
{
throw uno::RuntimeException();
}
static const sal_Unicode s_OpenBracket ('[');
static const sal_Unicode s_CloseBracket(']');
const ::rtl::OUString about( xSubjectURI.is()
? m_rExport.GetRelativeReference(xSubjectURI->getStringValue())
: ::rtl::OUStringBuffer().append(s_OpenBracket).append(
LookupBlankNode(xSubjectBNode)).append(s_CloseBracket)
.makeStringAndClear()
);
rdf::Statement* const iter
( ::std::partition( ::comphelper::stl_begin(stmts),
::comphelper::stl_end(stmts),
::boost::bind(&::rtl::OUString::equals, m_RDFsLabel,
::boost::bind(&rdf::XNode::getStringValue,
::boost::bind(&rdf::Statement::Predicate, _1))) ) );
if (iter != ::comphelper::stl_end(stmts))
{
// from iter to end, all stmts should have same object
const uno::Reference<rdf::XLiteral> xContent(
(*iter).Object, uno::UNO_QUERY_THROW );
const uno::Reference<rdf::XURI> xDatatype(xContent->getDatatype());
if (xDatatype.is())
{
const ::rtl::OUString datatype(
makeCURIE(&m_rExport, xDatatype) );
m_rExport.AddAttribute(XML_NAMESPACE_XHTML,
token::XML_DATATYPE, datatype);
}
if (iter != ::comphelper::stl_begin(stmts)) // there is rdfs:label
{
m_rExport.AddAttribute(XML_NAMESPACE_XHTML, token::XML_CONTENT,
xContent->getValue());
}
}
else
{
OSL_ENSURE(false,"invalid RDFa: every property is rdfs:label");
return;
}
::rtl::OUStringBuffer property;
::comphelper::intersperse(
::boost::make_transform_iterator(
iter, // omit RDFsLabel predicates!
::boost::bind(&makeCURIE, &m_rExport,
::boost::bind(&rdf::Statement::Predicate, _1))),
// argh, this must be the same type :(
::boost::make_transform_iterator(
::comphelper::stl_end(stmts),
::boost::bind(&makeCURIE, &m_rExport,
::boost::bind(&rdf::Statement::Predicate, _1))),
::comphelper::OUStringBufferAppender(property),
::rtl::OUString::createFromAscii(" "));
m_rExport.AddAttribute(XML_NAMESPACE_XHTML, token::XML_PROPERTY,
property.makeStringAndClear());
m_rExport.AddAttribute(XML_NAMESPACE_XHTML, token::XML_ABOUT, about);
}
catch (uno::Exception &)
{
OSL_ENSURE(false, "AddRDFa: exception");
}
}
} // namespace xmloff
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