LibreOffice Module xmloff (master)  1
RDFaExportHelper.cxx
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19 
20 #include <RDFaExportHelper.hxx>
21 
22 #include <xmloff/xmlnmspe.hxx>
23 
24 #include <xmloff/xmlexp.hxx>
25 #include <xmloff/xmltoken.hxx>
26 
27 #include <comphelper/stl_types.hxx>
29 
30 #include <com/sun/star/frame/XModel.hpp>
31 #include <com/sun/star/uri/XUriReference.hpp>
32 #include <com/sun/star/uri/UriReferenceFactory.hpp>
33 #include <com/sun/star/rdf/Statement.hpp>
34 #include <com/sun/star/rdf/XLiteral.hpp>
35 #include <com/sun/star/rdf/XRepositorySupplier.hpp>
36 #include <com/sun/star/rdf/XDocumentRepository.hpp>
37 
38 #include <rtl/ustrbuf.hxx>
39 #include <osl/diagnose.h>
40 
41 #include <algorithm>
42 
43 using namespace ::com::sun::star;
44 
45 namespace xmloff {
46 
47 static OUString
48 makeCURIE(SvXMLExport * i_pExport,
49  uno::Reference<rdf::XURI> const & i_xURI)
50 {
51  OSL_ENSURE(i_xURI.is(), "makeCURIE: null URI");
52  if (!i_xURI.is()) throw uno::RuntimeException();
53 
54  const OUString Namespace( i_xURI->getNamespace() );
55  OSL_ENSURE(!Namespace.isEmpty(), "makeCURIE: no namespace");
56  if (Namespace.isEmpty()) throw uno::RuntimeException();
57 
58  // N.B.: empty LocalName is valid!
59  return i_pExport->EnsureNamespace(Namespace) + ":" + i_xURI->getLocalName();
60 }
61 
62 // #i112473# SvXMLExport::GetRelativeReference() not right for RDF on SaveAs
63 // because the URIs in the repository are not rewritten on SaveAs, the
64 // URI of the loaded document has to be used, not the URI of the target doc.
65 static OUString
66 getRelativeReference(SvXMLExport const& rExport, OUString const& rURI)
67 {
68  uno::Reference< rdf::XURI > const xModelURI(
69  rExport.GetModel(), uno::UNO_QUERY_THROW );
70  OUString const baseURI( xModelURI->getStringValue() );
71 
72  uno::Reference<uno::XComponentContext> xContext( comphelper::getProcessComponentContext() );
73  uno::Reference<uri::XUriReferenceFactory> const xUriFactory =
74  uri::UriReferenceFactory::create( xContext );
75 
76  uno::Reference< uri::XUriReference > const xBaseURI(
77  xUriFactory->parse(baseURI), uno::UNO_SET_THROW );
78  uno::Reference< uri::XUriReference > const xAbsoluteURI(
79  xUriFactory->parse(rURI), uno::UNO_SET_THROW );
80  uno::Reference< uri::XUriReference > const xRelativeURI(
81  xUriFactory->makeRelative(xBaseURI, xAbsoluteURI, true, true, false),
82  uno::UNO_SET_THROW );
83  OUString const relativeURI(xRelativeURI->getUriReference());
84 
85  return relativeURI;
86 }
87 
89  : m_rExport(i_rExport), m_Counter(0)
90 {
91  const uno::Reference<rdf::XRepositorySupplier> xRS( m_rExport.GetModel(),
92  uno::UNO_QUERY_THROW);
93  m_xRepository.set(xRS->getRDFRepository(), uno::UNO_QUERY_THROW);
94 }
95 
96 OUString
98  uno::Reference<rdf::XBlankNode> const & i_xBlankNode)
99 {
100  OSL_ENSURE(i_xBlankNode.is(), "null BlankNode?");
101  if (!i_xBlankNode.is()) throw uno::RuntimeException();
102  OUString & rEntry(
103  m_BlankNodeMap[ i_xBlankNode->getStringValue() ] );
104  if (rEntry.isEmpty())
105  {
106  rEntry = "_:b" + OUString::number(++m_Counter);
107  }
108  return rEntry;
109 }
110 
111 void
113  uno::Reference<rdf::XMetadatable> const & i_xMetadatable)
114 {
115  try
116  {
117  beans::Pair< uno::Sequence<rdf::Statement>, sal_Bool > const
118  RDFaResult( m_xRepository->getStatementRDFa(i_xMetadatable) );
119 
120  uno::Sequence<rdf::Statement> const & rStatements( RDFaResult.First );
121 
122  if (!rStatements.hasElements())
123  {
124  return; // no RDFa
125  }
126 
127  // all stmts have the same subject, so we only handle first one
128  const uno::Reference<rdf::XURI> xSubjectURI(rStatements[0].Subject,
129  uno::UNO_QUERY);
130  const uno::Reference<rdf::XBlankNode> xSubjectBNode(
131  rStatements[0].Subject, uno::UNO_QUERY);
132  if (!xSubjectURI.is() && !xSubjectBNode.is())
133  {
134  throw uno::RuntimeException();
135  }
136  const OUString about( xSubjectURI.is()
137  ? getRelativeReference(m_rExport, xSubjectURI->getStringValue())
138  : "[" + LookupBlankNode(xSubjectBNode) + "]"
139  );
140 
141  const uno::Reference<rdf::XLiteral> xContent(
142  rStatements[0].Object, uno::UNO_QUERY_THROW );
143  const uno::Reference<rdf::XURI> xDatatype(xContent->getDatatype());
144  if (xDatatype.is())
145  {
146  const OUString datatype(
147  makeCURIE(&m_rExport, xDatatype) );
149  token::XML_DATATYPE, datatype);
150  }
151  if (RDFaResult.Second) // there is xhtml:content
152  {
154  xContent->getValue());
155  }
156 
157  ::std::vector<OUString> curies;
158  for (rdf::Statement const& rStatement : rStatements)
159  {
160  curies.push_back(makeCURIE(&m_rExport, rStatement.Predicate));
161  }
162  OUStringBuffer property;
163  ::comphelper::intersperse(curies.begin(), curies.end(),
165  OUString(" "));
166 
168  property.makeStringAndClear());
169 
171  }
172  catch (uno::Exception &)
173  {
174  OSL_FAIL("AddRDFa: exception");
175  }
176 }
177 
178 } // namespace xmloff
179 
180 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
static OUString getRelativeReference(SvXMLExport const &rExport, OUString const &rURI)
constexpr sal_uInt16 XML_NAMESPACE_XHTML
Definition: xmlnmspe.hxx:52
OUString EnsureNamespace(OUString const &i_rNamespace)
ensures that the given namespace is in scope at the next started element.
Definition: xmlexp.cxx:869
const css::uno::Reference< css::frame::XModel > & GetModel() const
Definition: xmlexp.hxx:415
void AddAttribute(sal_uInt16 nPrefix, const char *pName, const OUString &rValue)
Definition: xmlexp.cxx:926
OUString LookupBlankNode(css::uno::Reference< css::rdf::XBlankNode > const &i_xBlankNode)
void AddRDFa(css::uno::Reference< css::rdf::XMetadatable > const &i_xMetadatable)
unsigned char sal_Bool
css::uno::Reference< css::rdf::XDocumentRepository > m_xRepository
Reference< XComponentContext > getProcessComponentContext()
uno::Reference< ucb::XContent > xContent
RDFaExportHelper(SvXMLExport &i_rExport)
css::uno::Any const SvXMLExport & rExport
Definition: ImageStyle.hxx:38
static OUString makeCURIE(SvXMLExport *i_pExport, uno::Reference< rdf::XURI > const &i_xURI)