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Diffstat (limited to 'xmloff/source/core/RDFaExportHelper.cxx')
| -rw-r--r-- | xmloff/source/core/RDFaExportHelper.cxx | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/xmloff/source/core/RDFaExportHelper.cxx b/xmloff/source/core/RDFaExportHelper.cxx new file mode 100644 index 000000000..5b9e3b965 --- /dev/null +++ b/xmloff/source/core/RDFaExportHelper.cxx @@ -0,0 +1,180 @@ +/* -*- 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 <RDFaExportHelper.hxx> + +#include <xmloff/xmlnmspe.hxx> + +#include <xmloff/xmlexp.hxx> +#include <xmloff/xmltoken.hxx> + +#include <comphelper/stl_types.hxx> +#include <comphelper/processfactory.hxx> + +#include <com/sun/star/frame/XModel.hpp> +#include <com/sun/star/uri/XUriReference.hpp> +#include <com/sun/star/uri/UriReferenceFactory.hpp> +#include <com/sun/star/rdf/Statement.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 <osl/diagnose.h> + +#include <algorithm> + +using namespace ::com::sun::star; + +namespace xmloff { + +static 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 OUString Namespace( i_xURI->getNamespace() ); + OSL_ENSURE(!Namespace.isEmpty(), "makeCURIE: no namespace"); + if (Namespace.isEmpty()) throw uno::RuntimeException(); + + // N.B.: empty LocalName is valid! + return i_pExport->EnsureNamespace(Namespace) + ":" + i_xURI->getLocalName(); +} + +// #i112473# SvXMLExport::GetRelativeReference() not right for RDF on SaveAs +// because the URIs in the repository are not rewritten on SaveAs, the +// URI of the loaded document has to be used, not the URI of the target doc. +static OUString +getRelativeReference(SvXMLExport const& rExport, OUString const& rURI) +{ + uno::Reference< rdf::XURI > const xModelURI( + rExport.GetModel(), uno::UNO_QUERY_THROW ); + OUString const baseURI( xModelURI->getStringValue() ); + + uno::Reference<uno::XComponentContext> xContext( comphelper::getProcessComponentContext() ); + uno::Reference<uri::XUriReferenceFactory> const xUriFactory = + uri::UriReferenceFactory::create( xContext ); + + uno::Reference< uri::XUriReference > const xBaseURI( + xUriFactory->parse(baseURI), uno::UNO_SET_THROW ); + uno::Reference< uri::XUriReference > const xAbsoluteURI( + xUriFactory->parse(rURI), uno::UNO_SET_THROW ); + uno::Reference< uri::XUriReference > const xRelativeURI( + xUriFactory->makeRelative(xBaseURI, xAbsoluteURI, true, true, false), + uno::UNO_SET_THROW ); + OUString const relativeURI(xRelativeURI->getUriReference()); + + return relativeURI; +} + +RDFaExportHelper::RDFaExportHelper(SvXMLExport & i_rExport) + : m_rExport(i_rExport), m_Counter(0) +{ + const uno::Reference<rdf::XRepositorySupplier> xRS( m_rExport.GetModel(), + uno::UNO_QUERY_THROW); + m_xRepository.set(xRS->getRDFRepository(), uno::UNO_QUERY_THROW); +} + +OUString +RDFaExportHelper::LookupBlankNode( + uno::Reference<rdf::XBlankNode> const & i_xBlankNode) +{ + OSL_ENSURE(i_xBlankNode.is(), "null BlankNode?"); + if (!i_xBlankNode.is()) throw uno::RuntimeException(); + OUString & rEntry( + m_BlankNodeMap[ i_xBlankNode->getStringValue() ] ); + if (rEntry.isEmpty()) + { + rEntry = "_:b" + OUString::number(++m_Counter); + } + return rEntry; +} + +void +RDFaExportHelper::AddRDFa( + uno::Reference<rdf::XMetadatable> const & i_xMetadatable) +{ + try + { + beans::Pair< uno::Sequence<rdf::Statement>, sal_Bool > const + RDFaResult( m_xRepository->getStatementRDFa(i_xMetadatable) ); + + uno::Sequence<rdf::Statement> const & rStatements( RDFaResult.First ); + + if (!rStatements.hasElements()) + { + return; // no RDFa + } + + // all stmts have the same subject, so we only handle first one + const uno::Reference<rdf::XURI> xSubjectURI(rStatements[0].Subject, + uno::UNO_QUERY); + const uno::Reference<rdf::XBlankNode> xSubjectBNode( + rStatements[0].Subject, uno::UNO_QUERY); + if (!xSubjectURI.is() && !xSubjectBNode.is()) + { + throw uno::RuntimeException(); + } + const OUString about( xSubjectURI.is() + ? getRelativeReference(m_rExport, xSubjectURI->getStringValue()) + : "[" + LookupBlankNode(xSubjectBNode) + "]" + ); + + const uno::Reference<rdf::XLiteral> xContent( + rStatements[0].Object, uno::UNO_QUERY_THROW ); + const uno::Reference<rdf::XURI> xDatatype(xContent->getDatatype()); + if (xDatatype.is()) + { + const OUString datatype( + makeCURIE(&m_rExport, xDatatype) ); + m_rExport.AddAttribute(XML_NAMESPACE_XHTML, + token::XML_DATATYPE, datatype); + } + if (RDFaResult.Second) // there is xhtml:content + { + m_rExport.AddAttribute(XML_NAMESPACE_XHTML, token::XML_CONTENT, + xContent->getValue()); + } + + ::std::vector<OUString> curies; + for (rdf::Statement const& rStatement : rStatements) + { + curies.push_back(makeCURIE(&m_rExport, rStatement.Predicate)); + } + OUStringBuffer property; + ::comphelper::intersperse(curies.begin(), curies.end(), + ::comphelper::OUStringBufferAppender(property), + OUString(" ")); + + 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_FAIL("AddRDFa: exception"); + } +} + +} // namespace xmloff + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |