/*
 * SPDX-FileCopyrightText: 2007-2011 Peter Penz <peter.penz19@gmail.com>
 * SPDX-FileCopyrightText: 2007 David Faure <faure@kde.org>
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#ifndef DRAGANDDROPHELPER_H
#define DRAGANDDROPHELPER_H

#include "dolphin_export.h"

#include <QList>
#include <QUrl>

class QDropEvent;
class QWidget;
namespace KIO { class DropJob; }

class DOLPHIN_EXPORT DragAndDropHelper
{
public:
    /**
     * Handles the dropping of URLs to the given destination. A context menu
     * with the options 'Move Here', 'Copy Here', 'Link Here' and 'Cancel' is
     * offered to the user. The drag destination must represent a directory or
     * a desktop-file, otherwise the dropping gets ignored.
     *
     * @param destUrl   URL of the item destination. Is used only if destItem::isNull()
     *                  is true.
     * @param event     Drop event.
     * @param window    Widget where the drop happened, will be used as parent of the drop menu.
     * @return          KIO::DropJob pointer or null in case the destUrl is contained
     *                  in the mimeData url list.
     */
    static KIO::DropJob* dropUrls(const QUrl& destUrl,
                                  QDropEvent* event,
                                  QWidget *window);

    /**
     * @return True if destUrl is contained in the urls parameter.
     */
    static bool urlListMatchesUrl(const QList<QUrl>& urls, const QUrl& destUrl);

    /**
     * clear the internal cache.
     */
    static void clearUrlListMatchesUrlCache();
private:
    /**
     * Stores the results of the expensive checks made in urlListMatchesUrl.
     */
    static QHash<QUrl, bool> m_urlListMatchesUrlCache;
};

#endif