diff options
Diffstat (limited to 'xmloff/source/core/RDFaExportHelper.cxx')
| -rw-r--r-- | xmloff/source/core/RDFaExportHelper.cxx | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/xmloff/source/core/RDFaExportHelper.cxx b/xmloff/source/core/RDFaExportHelper.cxx new file mode 100644 index 000000000000..abd33ec80625 --- /dev/null +++ b/xmloff/source/core/RDFaExportHelper.cxx @@ -0,0 +1,218 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2008 by Sun Microsystems, Inc. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * $RCSfile: RDFaExportHelper.cxx,v $ + * $Revision: 1.1.2.4 $ + * + * 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 + |