/* This file is part of the KDE project
   SPDX-FileCopyrightText: 2007 David Faure <faure@kde.org>

   SPDX-License-Identifier: LGPL-2.0-or-later
*/

#ifndef DOLPHINPART_H
#define DOLPHINPART_H

#include <KParts/ReadOnlyPart>

#include <QAction>
#include <QUrl>

class DolphinNewFileMenu;
class DolphinViewActionHandler;
class QActionGroup;
class KFileItemList;
class KFileItem;
class DolphinPartBrowserExtension;
class DolphinRemoteEncoding;
class KDirLister;
class DolphinView;
class DolphinRemoveAction;

class DolphinPart : public KParts::ReadOnlyPart
{
    Q_OBJECT
    // Used by konqueror. Technically it means "we want undo enabled if
    // there are things in the undo history and the current part is a dolphin part".
    // Even though it's konqueror doing the undo...
    Q_PROPERTY(bool supportsUndo READ supportsUndo CONSTANT)

    Q_PROPERTY(QString currentViewMode READ currentViewMode WRITE setCurrentViewMode)

    // Used by konqueror when typing something like /home/dfaure/*.diff in the location bar
    Q_PROPERTY(QString nameFilter READ nameFilter WRITE setNameFilter)

    // Used by konqueror to implement the --select command-line option
    Q_PROPERTY(QList<QUrl> filesToSelect READ filesToSelect WRITE setFilesToSelect)

public:
    explicit DolphinPart(QWidget *parentWidget, QObject *parent, const KPluginMetaData &metaData, const QVariantList &args);
    ~DolphinPart() override;

    /**
     * Standard KParts::ReadOnlyPart openUrl method.
     * Called by Konqueror to view a directory in DolphinPart.
     */
    bool openUrl(const QUrl &url) override;

    /// see the supportsUndo property
    bool supportsUndo() const
    {
        return true;
    }

    /**
     * Used by konqueror for setting the view mode
     * @param viewModeName internal name for the view mode, like "icons"
     * Those names come from the Actions line in dolphinpart.desktop,
     * and have to match the name of the KActions.
     */
    void setCurrentViewMode(const QString &viewModeName);

    /**
     * Used by konqueror for displaying the current view mode.
     * @see setCurrentViewMode
     */
    QString currentViewMode() const;

    /// Returns the view owned by this part; used by DolphinPartBrowserExtension
    DolphinView *view()
    {
        return m_view;
    }

    /**
     * Sets a name filter, like *.diff
     */
    void setNameFilter(const QString &nameFilter);

    /**
     * Returns the current name filter. Used by konqueror to show it in the URL.
     */
    QString nameFilter() const
    {
        return m_nameFilter;
    }

    /**
     * Don't use this. Always @returns an empty list. It only exists to silence moc.
     */
    QList<QUrl> filesToSelect() const
    {
        return QList<QUrl>();
    }

protected:
    /**
     * We reimplement openUrl so no need to implement openFile.
     */
    bool openFile() override
    {
        return true;
    }

Q_SIGNALS:
    /**
     * Emitted when the view mode changes. Used by konqueror.
     */
    void viewModeChanged();

    /**
     * Emitted whenever the current URL is about to be changed.
     */
    void aboutToOpenURL();

private Q_SLOTS:
    void slotMessage(const QString &msg);
    void slotErrorMessage(const QString &msg);
    /**
     * Shows the information for the item \a item inside the statusbar. If the
     * item is null, the default statusbar information is shown.
     */
    void slotRequestItemInfo(const KFileItem &item);
    /**
     * Handles clicking on an item
     */
    void slotItemActivated(const KFileItem &item);
    /**
     * Handles activation of multiple items
     */
    void slotItemsActivated(const KFileItemList &items);
    /**
     * Creates a new window showing the content of \a url.
     */
    void createNewWindow(const QUrl &url);
    /**
     * Opens the context menu on the current mouse position.
     * @pos           Position in screen coordinates.
     * @item          File item context. If item is null, the context menu
     *                should be applied to \a url.
     * @selectedItems The selected items for which the context menu
     *                is opened. This list generally includes \a item.
     * @url           URL which contains \a item.
     */
    void slotOpenContextMenu(const QPoint &pos, const KFileItem &_item, const KFileItemList &selectedItems, const QUrl &);

    /**
     * Informs the host that we are opening \a url (e.g. after a redirection
     * coming from KDirLister).
     * Testcase 1: fish://localhost
     * Testcase 2: showing a directory that is being renamed by another window (#180156)
     */
    void slotDirectoryRedirection(const QUrl &oldUrl, const QUrl &newUrl);

    /**
     * Updates the state of the 'Edit' menu actions and emits
     * the signal selectionChanged().
     */
    void slotSelectionChanged(const KFileItemList &selection);

    /**
     * Updates the text of the paste action dependent from
     * the number of items which are in the clipboard.
     */
    void updatePasteAction();

    /**
     * Connected to all "Go" menu actions provided by DolphinPart
     */
    void slotGoTriggered(QAction *action);

    /**
     * Connected to the "editMimeType" action
     */
    void slotEditMimeType();

    /**
     * Connected to the "select_items_matching" action.
     * Opens a dialog which permits to select all items matching a pattern like "*.jpg".
     */
    void slotSelectItemsMatchingPattern();

    /**
     * Connected to the "unselect_items_matching" action.
     * Opens a dialog which permits to unselect all items matching a pattern like "*.jpg".
     */
    void slotUnselectItemsMatchingPattern();

    /**
     * Open a terminal window, starting with the current directory.
     */
    void slotOpenTerminal();

    /**
     * Open preferred search tool in the current directory to find files.
     */
    void slotFindFile();

    /**
     * Updates the 'Create New...' sub menu, just before it's shown.
     */
    void updateNewMenu();

    /**
     * Updates the number of items (= number of files + number of
     * directories) in the statusbar. If files are selected, the number
     * of selected files and the sum of the filesize is shown.
     */
    void updateStatusBar();

    /**
     * Notify container of folder loading progress.
     */
    void updateProgress(int percent);

    void createDirectory();

    /**
     * Called by konqueror --select
     */
    void setFilesToSelect(const QList<QUrl> &files);

    bool eventFilter(QObject *, QEvent *) override;

private:
    void createActions();
    void createGoAction(const char *name, const char *iconName, const QString &text, const QString &url, QActionGroup *actionGroup);

    void openSelectionDialog(const QString &title, const QString &text, bool selectItems);
    QString urlToLocalFilePath(const QUrl &url);
    QString localFilePathOrHome() const;

private:
    DolphinView *m_view;
    DolphinViewActionHandler *m_actionHandler;
    DolphinRemoteEncoding *m_remoteEncoding;
    DolphinPartBrowserExtension *m_extension;
    DolphinNewFileMenu *m_newFileMenu;
    QAction *m_findFileAction;
    QAction *m_openTerminalAction;
    QString m_nameFilter;
    DolphinRemoveAction *m_removeAction;
    Q_DISABLE_COPY(DolphinPart)
};

#endif /* DOLPHINPART_H */