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/*
* 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"
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