File indexing completed on 2024-04-28 04:58:03

 /*
  * SPDX-FileCopyrightText: 2018-2019 Kai Uwe Broulik <kde@broulik.de>
  *
  * SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
  */
 
 #include "opendocumentcreator.h"
 
 #include <QImage>
 #include <QScopedPointer>
 #include <QXmlStreamReader>
 
 #include <KPluginFactory>
 #include <KZip>
 
 K_PLUGIN_CLASS_WITH_JSON(OpenDocumentCreator, "opendocumentthumbnail.json")
 
 OpenDocumentCreator::OpenDocumentCreator(QObject *parent, const QVariantList &args)
     : KIO::ThumbnailCreator(parent, args)
 {
 }
 
 OpenDocumentCreator::~OpenDocumentCreator() = default;
 
 KIO::ThumbnailResult OpenDocumentCreator::create(const KIO::ThumbnailRequest &request)
 {
     KZip zip(request.url().toLocalFile());
     if (!zip.open(QIODevice::ReadOnly)) {
         return KIO::ThumbnailResult::fail();
     }
 
     // Open Document
     const KArchiveEntry *entry = zip.directory()->entry(QStringLiteral("Thumbnails/thumbnail.png"));
 
     if (entry && entry->isFile()) {
         const KZipFileEntry *zipFileEntry = static_cast<const KZipFileEntry *>(entry);
         QImage image;
         if (image.loadFromData(zipFileEntry->data(), "PNG")) {
             return KIO::ThumbnailResult::pass(image);
         }
     }
 
     // Open Packaging Conventions (e.g. Office "Open" XML)
     const KArchiveEntry *relsEntry = zip.directory()->entry(QStringLiteral("_rels/.rels"));
     if (relsEntry && relsEntry->isFile()) {
         const auto *relsFileEntry = static_cast<const KZipFileEntry *>(relsEntry);
 
         QScopedPointer<QIODevice> relsDevice(relsFileEntry->createDevice());
 
         QString thumbnailPath;
 
         QXmlStreamReader xml(relsDevice.data());
         while (!xml.atEnd() && !xml.hasError()) {
             xml.readNext();
             if (xml.isStartElement() && xml.name() == QLatin1String("Relationship")) {
                 const auto attributes = xml.attributes();
                 if (attributes.value(QStringLiteral("Type"))
                     == QLatin1String("http://schemas.openxmlformats.org/package/2006/relationships/metadata/thumbnail")) {
                     thumbnailPath = attributes.value(QStringLiteral("Target")).toString();
                     break;
                 }
             }
         }
 
         if (!thumbnailPath.isEmpty()) {
             const auto *thumbnailEntry = zip.directory()->entry(thumbnailPath);
             if (thumbnailEntry && thumbnailEntry->isFile()) {
                 QImage image;
                 image.loadFromData(static_cast<const KZipFileEntry *>(thumbnailEntry)->data());
                 return KIO::ThumbnailResult::pass(image);
             }
         }
     }
 
     return KIO::ThumbnailResult::fail();
 }
 
 #include "moc_opendocumentcreator.cpp"
 #include "opendocumentcreator.moc"