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/*
* SPDX-FileCopyrightText: 2007-2011 Peter Penz <[email protected]>
* SPDX-FileCopyrightText: 2007 David Faure <[email protected]>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "draganddrophelper.h"
#include <KIO/DropJob>
#include <KJobWidgets>
#include <QDBusConnection>
#include <QDBusMessage>
#include <QDropEvent>
#include <QMimeData>
QHash<QUrl, bool> DragAndDropHelper::m_urlListMatchesUrlCache;
bool DragAndDropHelper::urlListMatchesUrl(const QList<QUrl> &urls, const QUrl &destUrl)
{
auto iteratorResult = m_urlListMatchesUrlCache.constFind(destUrl);
if (iteratorResult != m_urlListMatchesUrlCache.constEnd()) {
return *iteratorResult;
}
const bool destUrlMatches = std::find_if(urls.constBegin(),
urls.constEnd(),
[destUrl](const QUrl &url) {
return url.matches(destUrl, QUrl::StripTrailingSlash);
})
!= urls.constEnd();
return *m_urlListMatchesUrlCache.insert(destUrl, destUrlMatches);
}
KIO::DropJob *DragAndDropHelper::dropUrls(const QUrl &destUrl, QDropEvent *event, QWidget *window)
{
const QMimeData *mimeData = event->mimeData();
if (isArkDndMimeType(mimeData)) {
const QString remoteDBusClient = QString::fromUtf8(mimeData->data(arkDndServiceMimeType()));
const QString remoteDBusPath = QString::fromUtf8(mimeData->data(arkDndPathMimeType()));
QDBusMessage message = QDBusMessage::createMethodCall(remoteDBusClient,
remoteDBusPath,
QStringLiteral("org.kde.ark.DndExtract"),
QStringLiteral("extractSelectedFilesTo"));
message.setArguments({destUrl.toDisplayString(QUrl::PreferLocalFile)});
QDBusConnection::sessionBus().call(message);
} else {
if (urlListMatchesUrl(event->mimeData()->urls(), destUrl)) {
return nullptr;
}
// TODO: remove this check once Qt is fixed so that it doesn't emit a QDropEvent on Wayland
// when we called QDragMoveEvent::ignore()
// https://codereview.qt-project.org/c/qt/qtwayland/+/541750
KFileItem item(destUrl);
// KFileItem(QUrl) only stat local URLs, so we always allow dropping on non-local URLs
if (!item.isLocalFile() || supportsDropping(item)) {
// Drop into a directory or a desktop-file
KIO::DropJob *job = KIO::drop(event, destUrl);
KJobWidgets::setWindow(job, window);
return job;
}
}
return nullptr;
}
bool DragAndDropHelper::supportsDropping(const KFileItem &destItem)
{
return (destItem.isDir() && destItem.isWritable()) || destItem.isDesktopFile();
}
DragAndDropHelper::DragAndDropHelper(QObject *parent)
: QObject(parent)
{
m_destItemCacheInvalidationTimer.setSingleShot(true);
m_destItemCacheInvalidationTimer.setInterval(30000);
connect(&m_destItemCacheInvalidationTimer, &QTimer::timeout, this, [this]() {
m_destItemCache = KFileItem();
});
}
void DragAndDropHelper::updateDropAction(QDropEvent *event, const QUrl &destUrl)
{
auto processEvent = [this](QDropEvent *event) {
if (supportsDropping(m_destItemCache)) {
event->setDropAction(event->proposedAction());
event->accept();
} else {
event->setDropAction(Qt::IgnoreAction);
event->ignore();
}
};
m_lastUndecidedEvent = nullptr;
if (urlListMatchesUrl(event->mimeData()->urls(), destUrl)) {
event->setDropAction(Qt::IgnoreAction);
event->ignore();
return;
}
if (destUrl == m_destItemCache.url()) {
// We already received events for this URL, and already have the
// stat result cached because:
// 1. it's a local file, and we already called KFileItem(destUrl)
// 2. it's a remote file, and StatJob finished
processEvent(event);
return;
}
if (m_statJob) {
if (destUrl == m_statJobUrl) {
// We already received events for this URL. Still waiting for
// the stat result. StatJob will process the event when it finishes.
m_lastUndecidedEvent = event;
return;
}
// We are waiting for the stat result of a different URL. Cancel.
m_statJob->kill();
m_statJob = nullptr;
m_statJobUrl.clear();
}
if (destUrl.isLocalFile()) {
// New local URL. KFileItem will stat on demand.
m_destItemCache = KFileItem(destUrl);
m_destItemCacheInvalidationTimer.start();
processEvent(event);
return;
}
// New remote URL. Start a StatJob and process the event when it finishes.
m_lastUndecidedEvent = event;
m_statJob = KIO::stat(destUrl, KIO::StatJob::SourceSide, KIO::StatDetail::StatBasic, KIO::JobFlag::HideProgressInfo);
m_statJobUrl = destUrl;
connect(m_statJob, &KIO::StatJob::result, this, [this, processEvent](KJob *job) {
KIO::StatJob *statJob = static_cast<KIO::StatJob *>(job);
m_destItemCache = KFileItem(statJob->statResult(), m_statJobUrl);
m_destItemCacheInvalidationTimer.start();
if (m_lastUndecidedEvent) {
processEvent(m_lastUndecidedEvent);
m_lastUndecidedEvent = nullptr;
}
m_statJob = nullptr;
m_statJobUrl.clear();
});
}
void DragAndDropHelper::clearUrlListMatchesUrlCache()
{
DragAndDropHelper::m_urlListMatchesUrlCache.clear();
}
bool DragAndDropHelper::isArkDndMimeType(const QMimeData *mimeData)
{
return mimeData->hasFormat(arkDndServiceMimeType()) && mimeData->hasFormat(arkDndPathMimeType());
}
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