src/views/draganddrophelper.cpp

   1 /*
   2  * SPDX-FileCopyrightText: 2007-2011 Peter Penz <peter.penz19@gmail.com>
   3  * SPDX-FileCopyrightText: 2007 David Faure <faure@kde.org>
   4  *
   5  * SPDX-License-Identifier: GPL-2.0-or-later
   6  */
   7
   8 #include "draganddrophelper.h"
   9
  10 #include <KIO/DropJob>
  11 #include <KJobWidgets>
  12
  13 #include <QDBusConnection>
  14 #include <QDBusMessage>
  15 #include <QDropEvent>
  16 #include <QMimeData>
  17
  18 QHash<QUrl, bool> DragAndDropHelper::m_urlListMatchesUrlCache;
  19
  20 bool DragAndDropHelper::urlListMatchesUrl(const QList<QUrl> &urls, const QUrl &destUrl)
  21 {
  22     auto iteratorResult = m_urlListMatchesUrlCache.constFind(destUrl);
  23     if (iteratorResult != m_urlListMatchesUrlCache.constEnd()) {
  24         return *iteratorResult;
  25     }
  26
  27     const bool destUrlMatches = std::find_if(urls.constBegin(),
  28                                              urls.constEnd(),
  29                                              [destUrl](const QUrl &url) {
  30                                                  return url.matches(destUrl, QUrl::StripTrailingSlash);
  31                                              })
  32         != urls.constEnd();
  33
  34     return *m_urlListMatchesUrlCache.insert(destUrl, destUrlMatches);
  35 }
  36
  37 KIO::DropJob *DragAndDropHelper::dropUrls(const QUrl &destUrl, QDropEvent *event, QWidget *window)
  38 {
  39     const QMimeData *mimeData = event->mimeData();
  40     if (isArkDndMimeType(mimeData)) {
  41         const QString remoteDBusClient = QString::fromUtf8(mimeData->data(arkDndServiceMimeType()));
  42         const QString remoteDBusPath = QString::fromUtf8(mimeData->data(arkDndPathMimeType()));
  43
  44         QDBusMessage message = QDBusMessage::createMethodCall(remoteDBusClient,
  45                                                               remoteDBusPath,
  46                                                               QStringLiteral("org.kde.ark.DndExtract"),
  47                                                               QStringLiteral("extractSelectedFilesTo"));
  48         message.setArguments({destUrl.toDisplayString(QUrl::PreferLocalFile)});
  49         QDBusConnection::sessionBus().call(message);
  50     } else {
  51         if (urlListMatchesUrl(event->mimeData()->urls(), destUrl)) {
  52             return nullptr;
  53         }
  54
  55         // TODO: remove this check once Qt is fixed so that it doesn't emit a QDropEvent on Wayland
  56         // when we called QDragMoveEvent::ignore()
  57         // https://codereview.qt-project.org/c/qt/qtwayland/+/541750
  58         KFileItem item(destUrl);
  59         // KFileItem(QUrl) only stat local URLs, so we always allow dropping on non-local URLs
  60         if (!item.isLocalFile() || supportsDropping(item)) {
  61             // Drop into a directory or a desktop-file
  62             KIO::DropJob *job = KIO::drop(event, destUrl);
  63             KJobWidgets::setWindow(job, window);
  64             return job;
  65         }
  66     }
  67
  68     return nullptr;
  69 }
  70
  71 bool DragAndDropHelper::supportsDropping(const KFileItem &destItem)
  72 {
  73     return (destItem.isDir() && destItem.isWritable()) || destItem.isDesktopFile();
  74 }
  75
  76 void DragAndDropHelper::updateDropAction(QDropEvent *event, const QUrl &destUrl)
  77 {
  78     if (urlListMatchesUrl(event->mimeData()->urls(), destUrl)) {
  79         event->setDropAction(Qt::IgnoreAction);
  80         event->ignore();
  81     }
  82     KFileItem item(destUrl);
  83     if (!item.isLocalFile() || supportsDropping(item)) {
  84         event->setDropAction(event->proposedAction());
  85         event->accept();
  86     } else {
  87         event->setDropAction(Qt::IgnoreAction);
  88         event->ignore();
  89     }
  90 }
  91
  92 void DragAndDropHelper::clearUrlListMatchesUrlCache()
  93 {
  94     DragAndDropHelper::m_urlListMatchesUrlCache.clear();
  95 }
  96
  97 bool DragAndDropHelper::isArkDndMimeType(const QMimeData *mimeData)
  98 {
  99     return mimeData->hasFormat(arkDndServiceMimeType()) && mimeData->hasFormat(arkDndPathMimeType());
 100 }