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Diffstat (limited to 'vcl/source/pdf/XmpMetadata.cxx')
| -rw-r--r-- | vcl/source/pdf/XmpMetadata.cxx | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/vcl/source/pdf/XmpMetadata.cxx b/vcl/source/pdf/XmpMetadata.cxx new file mode 100644 index 000000000..156e849f4 --- /dev/null +++ b/vcl/source/pdf/XmpMetadata.cxx @@ -0,0 +1,190 @@ +/* -*- 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", "xmpmeta", "adobe:ns:meta/"); + aXmlWriter.startElement("rdf", "RDF", "http://www.w3.org/1999/02/22-rdf-syntax-ns#"); + + // PDF/A part ( ISO 19005-1:2005 - 6.7.11 ) + if (mnPDF_A > 0) + { + OString sPdfVersion = OString::number(mnPDF_A); + OString sPdfConformance = (mnPDF_A == 1) ? "A" : "B"; + + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", OString("")); + aXmlWriter.attribute("xmlns:pdfaid", OString("http://www.aiim.org/pdfa/ns/id/")); + + aXmlWriter.startElement("pdfaid:part"); + aXmlWriter.content(sPdfVersion); + aXmlWriter.endElement(); + + aXmlWriter.startElement("pdfaid:conformance"); + aXmlWriter.content(sPdfConformance); + aXmlWriter.endElement(); + + aXmlWriter.endElement(); + } + + // Dublin Core properties + if (!msTitle.isEmpty() || !msAuthor.isEmpty() || !msSubject.isEmpty()) + { + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", OString("")); + aXmlWriter.attribute("xmlns:dc", OString("http://purl.org/dc/elements/1.1/")); + 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", OString("x-default")); + 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", OString("x-default")); + aXmlWriter.content(msSubject); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + aXmlWriter.endElement(); + } + aXmlWriter.endElement(); + } + + // PDF/UA + if (mbPDF_UA) + { + OString sPdfUaVersion = OString::number(1); + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", OString("")); + aXmlWriter.attribute("xmlns:pdfuaid", OString("http://www.aiim.org/pdfua/ns/id/")); + + aXmlWriter.startElement("pdfuaid:part"); + aXmlWriter.content(sPdfUaVersion); + aXmlWriter.endElement(); + + aXmlWriter.endElement(); + } + + // PDF properties + if (!msProducer.isEmpty() || !msKeywords.isEmpty()) + { + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", OString("")); + aXmlWriter.attribute("xmlns:pdf", OString("http://ns.adobe.com/pdf/1.3/")); + if (!msProducer.isEmpty()) + { + aXmlWriter.startElement("pdf:Producer"); + aXmlWriter.content(msProducer); + aXmlWriter.endElement(); + } + if (!msKeywords.isEmpty()) + { + aXmlWriter.startElement("pdf:Keywords"); + aXmlWriter.content(msKeywords); + aXmlWriter.endElement(); + } + aXmlWriter.endElement(); + } + + // XMP Basic schema + aXmlWriter.startElement("rdf:Description"); + aXmlWriter.attribute("rdf:about", OString("")); + aXmlWriter.attribute("xmlns:xmp", OString("http://ns.adobe.com/xap/1.0/")); + 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.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: */ |