// -*- c++ -*-
/* This file is part of the KDE libraries
    Copyright (C) 2003 Joseph Wenninger <jowenn@kde.org>
		  2003 Andras Mantia <amantia@freemail.hu>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

#ifndef KENCODINGFILEDIALOG_H
#define KENCODINGFILEDIALOG_H

#include <kfiledialog.h>

struct KEncodingFileDialogPrivate;

/**
 * Provides a user (and developer) friendly way to
 * select files with support for choosing encoding
 *
 *
 * The dialog has been designed to allow applications to customize it
 * by subclassing. It uses geometry management to ensure that subclasses
 * can easily add children that will be incorporated into the layout.
 */

class KIO_EXPORT KEncodingFileDialog : public KFileDialog
{
    Q_OBJECT
public:
    class Result
    {
    public:
        QStringList fileNames;
        KUrl::List URLs;
        QString encoding;
    };

    /**
     * Constructs a file dialog for text files with encoding selection possibility.
     *
     * @param startDir This can either be
     *         @li The URL of the directory to start in.
     *         @li QString() to start in the current working
     *             directory, or the last directory where a file has been
     *             selected.
     *         @li ':&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in the same application that specified
     *             the same keyword.
     *         @li '::&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in any application that specified the
     *             same keyword.
     *
     * @param encoding The encoding shown in the encoding combo. If it's
     *                 QString(), the global default encoding will be shown.
     *
     * @param filter A shell glob or a mime-type-filter that specifies which files to display.
     *    The preferred option is to set a list of mimetype names, see setMimeFilter() for details.
     *    Otherwise you can set the text to be displayed for the each glob, and
     *    provide multiple globs, see setFilter() for details.
     *
     * @param caption The caption of the dialog
     *
     * @param type This can either be
     *          @li Opening (open dialog, the default setting)
     *          @li Saving
     * @param parent The parent widget of this dialog
     */
    KEncodingFileDialog(const QString &startDir = QString(),
                        const QString &encoding = QString(),
                        const QString &filter = QString(),
                        const QString &caption = QString(), KFileDialog::OperationMode type = KFileDialog::Opening,
                        QWidget *parent = nullptr);
    /**
     * Destructs the file dialog.
     */
    ~KEncodingFileDialog();


    /**
    * @returns The selected encoding if the constructor with the encoding parameter was used, otherwise QString().
    */
    QString selectedEncoding() const;


    /**
     * Creates a modal file dialog and return the selected
     * filename or an empty string if none was chosen additionally a chosen
     * encoding value is returned.
     *
     * Note that with
     * this method the user must select an existing filename.
     *
     * @param encoding The encoding shown in the encoding combo.
     * @param startDir This can either be
     *         @li The URL of the directory to start in.
     *         @li QString() to start in the current working
     *             directory, or the last directory where a file has been
     *             selected.
     *         @li ':&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in the same application that specified
     *             the same keyword.
     *         @li '::&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in any application that specified the
     *             same keyword.
     * @param filter A shell glob or a mime-type-filter that specifies which files to display.
     *    The preferred option is to set a list of mimetype names, see setMimeFilter() for details.
     *    Otherwise you can set the text to be displayed for the each glob, and
     *    provide multiple globs, see setFilter() for details.
     * @param parent The widget the dialog will be centered on initially.
     * @param caption The name of the dialog widget.
     */
    static Result getOpenFileNameAndEncoding(const QString &encoding =QString(),
                                             const QString &startDir = QString(),
                                             const QString &filter = QString(),
                                             QWidget *parent = nullptr,
                                             const QString &caption = QString());

    /**
     * Creates a modal file dialog and returns the selected encoding and the selected
     * filenames or an empty list if none was chosen.
     *
     * Note that with
     * this method the user must select an existing filename.
     *
     * @param encoding The encoding shown in the encoding combo.
     * @param startDir This can either be
     *         @li The URL of the directory to start in.
     *         @li QString() to start in the current working
     *             directory, or the last directory where a file has been
     *             selected.
     *         @li ':&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in the same application that specified
     *             the same keyword.
     *         @li '::&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in any application that specified the
     *             same keyword.
     * @param filter A shell glob or a mime-type-filter that specifies which files to display.
     *    The preferred option is to set a list of mimetype names, see setMimeFilter() for details.
     *    Otherwise you can set the text to be displayed for the each glob, and
     *    provide multiple globs, see setFilter() for details.
     * @param parent The widget the dialog will be centered on initially.
     * @param caption The name of the dialog widget.
     */
    static Result getOpenFileNamesAndEncoding(const QString &encoding = QString(),
                                              const QString &startDir = QString(),
                                              const QString &filter = QString(),
                                              QWidget *parent = nullptr,
                                              const QString &caption = QString());

    /**
     * Creates a modal file dialog and returns the selected encoding and
     * URL or an empty string if none was chosen.
     *
     * Note that with
     * this method the user must select an existing URL.
     *
     * @param encoding The encoding shown in the encoding combo.
     * @param startDir This can either be
     *         @li The URL of the directory to start in.
     *         @li QString() to start in the current working
     *             directory, or the last directory where a file has been
     *             selected.
     *         @li ':&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in the same application that specified
     *             the same keyword.
     *         @li '::&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in any application that specified the
     *             same keyword.
     * @param filter A shell glob or a mime-type-filter that specifies which files to display.
     *    The preferred option is to set a list of mimetype names, see setMimeFilter() for details.
     *    Otherwise you can set the text to be displayed for the each glob, and
     *    provide multiple globs, see setFilter() for details.
     * @param parent The widget the dialog will be centered on initially.
     * @param caption The name of the dialog widget.
     */
    static Result getOpenUrlAndEncoding(const QString &encoding = QString(),
                                        const QString &startDir = QString(),
                                        const QString &filter = QString(),
                                        QWidget *parent = nullptr,
                                        const QString &caption = QString());




    /**
     * Creates a modal file dialog and returns the selected encoding
     * URLs or an empty list if none was chosen.
     *
     * Note that with
     * this method the user must select an existing filename.
     *
     * @param encoding The encoding shown in the encoding combo.
     * @param startDir This can either be
     *         @li The URL of the directory to start in.
     *         @li QString() to start in the current working
     *             directory, or the last directory where a file has been
     *             selected.
     *         @li ':&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in the same application that specified
     *             the same keyword.
     *         @li '::&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in any application that specified the
     *             same keyword.
     * @param filter A shell glob or a mime-type-filter that specifies which files to display.
     *    The preferred option is to set a list of mimetype names, see setMimeFilter() for details.
     *    Otherwise you can set the text to be displayed for the each glob, and
     *    provide multiple globs, see setFilter() for details.
     * @param parent The widget the dialog will be centered on initially.
     * @param caption The name of the dialog widget.
     */
    static Result getOpenUrlsAndEncoding(const QString &encoding = QString(),
                                         const QString &startDir = QString(),
                                         const QString &filter = QString(),
                                         QWidget *parent = nullptr,
                                         const QString &caption = QString());



    /**
     * Creates a modal file dialog and returns the selected encoding and
     * filename or an empty string if none was chosen.
     *
     * Note that with this
     * method the user need not select an existing filename.
     *
     * @param encoding The encoding shown in the encoding combo.
     * @param startDir This can either be
     *         @li The URL of the directory to start in.
     *         @li a relative path or a filename determining the
     *             directory to start in and the file to be selected.
     *         @li QString() to start in the current working
     *             directory, or the last directory where a file has been
     *             selected.
     *         @li ':&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in the same application that specified
     *             the same keyword.
     *         @li '::&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in any application that specified the
     *             same keyword.
     * @param filter A shell glob or a mime-type-filter that specifies which files to display.
     *    The preferred option is to set a list of mimetype names, see setMimeFilter() for details.
     *    Otherwise you can set the text to be displayed for the each glob, and
     *    provide multiple globs, see setFilter() for details.
     * @param parent The widget the dialog will be centered on initially.
     * @param caption The name of the dialog widget.
     */
    static Result getSaveFileNameAndEncoding(const QString &encoding = QString(),
                                             const QString &startDir = QString(),
                                             const QString &filter = QString(),
                                             QWidget *parent = nullptr,
                                             const QString &caption = QString());


    /**
     * Creates a modal file dialog and returns the selected encoding and
     * filename or an empty string if none was chosen.
     *
     * Note that with this
     * method the user need not select an existing filename.
     *
     * @param encoding The encoding shown in the encoding combo.
     * @param startDir This can either be
     *         @li The URL of the directory to start in.
     *         @li a relative path or a filename determining the
     *             directory to start in and the file to be selected.
     *         @li QString() to start in the current working
     *             directory, or the last directory where a file has been
     *             selected.
     *         @li ':&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in the same application that specified
     *             the same keyword.
     *         @li '::&lt;keyword&gt;' to start in the directory last used
     *             by a filedialog in any application that specified the
     *             same keyword.
     * @param filter A shell glob or a mime-type-filter that specifies which files to display.
     *    The preferred option is to set a list of mimetype names, see setMimeFilter() for details.
     *    Otherwise you can set the text to be displayed for the each glob, and
     *    provide multiple globs, see setFilter() for details.
     * @param parent The widget the dialog will be centered on initially.
     * @param caption The name of the dialog widget.
     */
    static Result getSaveUrlAndEncoding(const QString &encoding = QString(),
                                        const QString &startDir = QString(),
                                        const QString& filter= QString(),
                                        QWidget *parent = nullptr,
                                        const QString &caption = QString());



private:
    KEncodingFileDialogPrivate* const d;
};

#endif // KENCODINGFILEDIALOG_H
