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Diffstat (limited to 'vcl/source/pdf/XmpMetadata.cxx')
| -rw-r--r-- | vcl/source/pdf/XmpMetadata.cxx | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/vcl/source/pdf/XmpMetadata.cxx b/vcl/source/pdf/XmpMetadata.cxx new file mode 100644 index 0000000000..53bf3902ab --- /dev/null +++ b/vcl/source/pdf/XmpMetadata.cxx @@ -0,0 +1,367 @@ +/* -*- 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/. + * + */ + +#include <pdf/XmpMetadata.hxx> +#include <tools/XmlWriter.hxx> + +namespace vcl::pdf +{ +namespace +{ +constexpr const char* constPadding = " " + " " + " " + " " + " " + "\n"; +} + +XmpMetadata::XmpMetadata() + : mbWritten(false) + , mnPDF_A(0) + , mbPDF_UA(false) +{ +} + +void XmpMetadata::write() +{ + mpMemoryStream = std::make_unique<SvMemoryStream>(4096 /*Initial*/, 64 /*Resize*/); + + // Header + mpMemoryStream->WriteOString( + OStringLiteral(u8"<?xpacket begin=\"\uFEFF\" id=\"W5M0MpCehiHzreSzNTczkc9d\"?>\n")); + + { + tools::XmlWriter aXmlWriter(mpMemoryStream.get()); + aXmlWriter.startDocument(2, false); + aXmlWriter.startElement("x"_ostr, "xmpmeta"_ostr, "adobe:ns:meta/"_ostr); + aXmlWriter.startElement("rdf"_ostr, "RDF"_ostr, + "http://www.w3.org/1999/02/22-rdf-syntax-ns#"_ostr); + + // PDF/A part ( ISO 19005-1:2005 - 6.7.11 ) + if (mnPDF_A > 0) + { + OString sPdfVersion = OString::number(mnPDF_A); + + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", ""_ostr); + aXmlWriter.attribute("xmlns:pdfaid", "http://www.aiim.org/pdfa/ns/id/"_ostr); + + aXmlWriter.startElement("pdfaid:part"); + aXmlWriter.content(sPdfVersion); + aXmlWriter.endElement(); + + aXmlWriter.startElement("pdfaid:conformance"); + aXmlWriter.content("B"_ostr); + aXmlWriter.endElement(); + + aXmlWriter.endElement(); + } + + // Dublin Core properties + if (!msTitle.isEmpty() || !msAuthor.isEmpty() || !msSubject.isEmpty() + || !maContributor.empty() || !msCoverage.isEmpty() || !msIdentifier.isEmpty() + || !maPublisher.empty() || !maRelation.empty() || !msRights.isEmpty() + || !msSource.isEmpty() || !msType.isEmpty()) + { + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", ""_ostr); + aXmlWriter.attribute("xmlns:dc", "http://purl.org/dc/elements/1.1/"_ostr); + + aXmlWriter.startElement("dc:format"); + aXmlWriter.content("application/pdf"_ostr); + aXmlWriter.endElement(); + + if (!msTitle.isEmpty()) + { + // this is according to PDF/A-1, technical corrigendum 1 (2007-04-01) + aXmlWriter.startElement("dc:title"); + aXmlWriter.startElement("rdf:Alt"); + aXmlWriter.startElement("rdf:li"); + aXmlWriter.attribute("xml:lang", "x-default"_ostr); + aXmlWriter.content(msTitle); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + } + if (!msAuthor.isEmpty()) + { + aXmlWriter.startElement("dc:creator"); + aXmlWriter.startElement("rdf:Seq"); + aXmlWriter.startElement("rdf:li"); + aXmlWriter.content(msAuthor); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + } + if (!msSubject.isEmpty()) + { + aXmlWriter.startElement("dc:description"); + aXmlWriter.startElement("rdf:Alt"); + aXmlWriter.startElement("rdf:li"); + aXmlWriter.attribute("xml:lang", "x-default"_ostr); + aXmlWriter.content(msSubject); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + } + if (!maContributor.empty()) + { + aXmlWriter.startElement("dc:contributor"); + aXmlWriter.startElement("rdf:Bag"); + for (const OString& rContributor : maContributor) + { + aXmlWriter.startElement("rdf:li"); + aXmlWriter.content(rContributor); + aXmlWriter.endElement(); + } + aXmlWriter.endElement(); + aXmlWriter.endElement(); + } + if (!msCoverage.isEmpty()) + { + aXmlWriter.startElement("dc:coverage"); + aXmlWriter.content(msCoverage); + aXmlWriter.endElement(); + } + if (!msIdentifier.isEmpty()) + { + aXmlWriter.startElement("dc:identifier"); + aXmlWriter.content(msIdentifier); + aXmlWriter.endElement(); + } + if (!maPublisher.empty()) + { + aXmlWriter.startElement("dc:publisher"); + aXmlWriter.startElement("rdf:Bag"); + for (const OString& rPublisher : maPublisher) + { + aXmlWriter.startElement("rdf:li"); + aXmlWriter.content(rPublisher); + aXmlWriter.endElement(); + } + aXmlWriter.endElement(); + aXmlWriter.endElement(); + } + if (!maRelation.empty()) + { + aXmlWriter.startElement("dc:relation"); + aXmlWriter.startElement("rdf:Bag"); + for (const OString& rRelation : maRelation) + { + aXmlWriter.startElement("rdf:li"); + aXmlWriter.content(rRelation); + aXmlWriter.endElement(); + } + aXmlWriter.endElement(); + aXmlWriter.endElement(); + } + if (!msRights.isEmpty()) + { + aXmlWriter.startElement("dc:rights"); + aXmlWriter.startElement("rdf:Alt"); + aXmlWriter.startElement("rdf:li"); + aXmlWriter.attribute("xml:lang", "x-default"_ostr); + aXmlWriter.content(msRights); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + } + if (!msSource.isEmpty()) + { + aXmlWriter.startElement("dc:source"); + aXmlWriter.content(msSource); + aXmlWriter.endElement(); + } + if (!msType.isEmpty()) + { + aXmlWriter.startElement("dc:type"); + aXmlWriter.content(msType); + aXmlWriter.endElement(); + } + aXmlWriter.endElement(); + } + + // PDF/UA + if (mbPDF_UA) + { + if (mnPDF_A != 0) + { // tdf#157517 PDF/A extension schema is required + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", ""_ostr); + aXmlWriter.attribute("xmlns:pdfaExtension", + "http://www.aiim.org/pdfa/ns/extension/"_ostr); + aXmlWriter.attribute("xmlns:pdfaSchema", + "http://www.aiim.org/pdfa/ns/schema#"_ostr); + aXmlWriter.attribute("xmlns:pdfaProperty", + "http://www.aiim.org/pdfa/ns/property#"_ostr); + aXmlWriter.startElement("pdfaExtension:schemas"); + aXmlWriter.startElement("rdf:Bag"); + aXmlWriter.startElement("rdf:li"); + aXmlWriter.attribute("rdf:parseType", "Resource"_ostr); + aXmlWriter.startElement("pdfaSchema:namespaceURI"); + aXmlWriter.content("http://www.aiim.org/pdfua/ns/id/"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaSchema:prefix"); + aXmlWriter.content("pdfuaid"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaSchema:schema"); + aXmlWriter.content("PDF/UA identification schema"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaSchema:property"); + aXmlWriter.startElement("rdf:Seq"); + + aXmlWriter.startElement("rdf:li"); + aXmlWriter.attribute("rdf:parseType", "Resource"_ostr); + aXmlWriter.startElement("pdfaProperty:category"); + aXmlWriter.content("internal"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaProperty:description"); + aXmlWriter.content("PDF/UA version identifier"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaProperty:name"); + aXmlWriter.content("part"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaProperty:valueType"); + aXmlWriter.content("Integer"_ostr); + aXmlWriter.endElement(); + aXmlWriter.endElement(); // rdf:li + + aXmlWriter.startElement("rdf:li"); + aXmlWriter.attribute("rdf:parseType", "Resource"_ostr); + aXmlWriter.startElement("pdfaProperty:category"); + aXmlWriter.content("internal"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaProperty:description"); + aXmlWriter.content("PDF/UA amendment identifier"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaProperty:name"); + aXmlWriter.content("amd"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaProperty:valueType"); + aXmlWriter.content("Text"_ostr); + aXmlWriter.endElement(); + aXmlWriter.endElement(); // rdf:li + + aXmlWriter.startElement("rdf:li"); + aXmlWriter.attribute("rdf:parseType", "Resource"_ostr); + aXmlWriter.startElement("pdfaProperty:category"); + aXmlWriter.content("internal"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaProperty:description"); + aXmlWriter.content("PDF/UA corrigenda identifier"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaProperty:name"); + aXmlWriter.content("corr"_ostr); + aXmlWriter.endElement(); + aXmlWriter.startElement("pdfaProperty:valueType"); + aXmlWriter.content("Text"_ostr); + aXmlWriter.endElement(); + aXmlWriter.endElement(); // rdf:li + + aXmlWriter.endElement(); // rdf:Seq + aXmlWriter.endElement(); // pdfaSchema:property + aXmlWriter.endElement(); // rdf:li + aXmlWriter.endElement(); // rdf:Bag + aXmlWriter.endElement(); // pdfaExtension:schemas + aXmlWriter.endElement(); // rdf:Description + } + OString sPdfUaVersion = OString::number(1); + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", ""_ostr); + aXmlWriter.attribute("xmlns:pdfuaid", "http://www.aiim.org/pdfua/ns/id/"_ostr); + + aXmlWriter.startElement("pdfuaid:part"); + aXmlWriter.content(sPdfUaVersion); + aXmlWriter.endElement(); + + aXmlWriter.endElement(); + } + + // PDF properties + if (!msProducer.isEmpty() || !msKeywords.isEmpty() || !msPDFVersion.isEmpty()) + { + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", ""_ostr); + aXmlWriter.attribute("xmlns:pdf", "http://ns.adobe.com/pdf/1.3/"_ostr); + if (!msProducer.isEmpty()) + { + aXmlWriter.startElement("pdf:Producer"); + aXmlWriter.content(msProducer); + aXmlWriter.endElement(); + } + if (!msKeywords.isEmpty()) + { + aXmlWriter.startElement("pdf:Keywords"); + aXmlWriter.content(msKeywords); + aXmlWriter.endElement(); + } + if (!msPDFVersion.isEmpty()) + { + aXmlWriter.startElement("pdf:PDFVersion"); + aXmlWriter.content(msPDFVersion); + aXmlWriter.endElement(); + } + aXmlWriter.endElement(); + } + + // XMP Basic schema + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", ""_ostr); + aXmlWriter.attribute("xmlns:xmp", "http://ns.adobe.com/xap/1.0/"_ostr); + if (!m_sCreatorTool.isEmpty()) + { + aXmlWriter.startElement("xmp:CreatorTool"); + aXmlWriter.content(m_sCreatorTool); + aXmlWriter.endElement(); + } + aXmlWriter.startElement("xmp:CreateDate"); + aXmlWriter.content(m_sCreateDate); + aXmlWriter.endElement(); + + aXmlWriter.startElement("xmp:ModifyDate"); + aXmlWriter.content(m_sCreateDate); + aXmlWriter.endElement(); + + aXmlWriter.startElement("xmp:MetadataDate"); + aXmlWriter.content(m_sCreateDate); + aXmlWriter.endElement(); + + aXmlWriter.endElement(); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + aXmlWriter.endDocument(); + } + + // add padding (needed so the metadata can be changed in-place" + for (sal_Int32 nSpaces = 1; nSpaces <= 21; nSpaces++) + mpMemoryStream->WriteOString(constPadding); + + mpMemoryStream->WriteOString("<?xpacket end=\"w\"?>\n"); + mbWritten = true; +} + +sal_uInt64 XmpMetadata::getSize() +{ + if (!mbWritten) + write(); + return mpMemoryStream->GetSize(); +} + +const void* XmpMetadata::getData() +{ + if (!mbWritten) + write(); + return mpMemoryStream->GetData(); +} + +} // end vcl::pdf + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |