/***************************************************************************
 *   Copyright (C) 2004-2017 by Thomas Fischer <fischer@unix-ag.uni-kl.de> *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, see <https://www.gnu.org/licenses/>. *
 ***************************************************************************/

#ifndef KBIBTEX_IO_COMMENT_H
#define KBIBTEX_IO_COMMENT_H

#include "element.h"

/**
 * This class represents a comment in a BibTeX file. In BibTeX files,
 * everything that cannot be interpreted as a BibTeX comment is see
 * as a comment. Alternatively, the comment command can be used in BibTeX
 * files.
 * @author Thomas Fischer <fischer@unix-ag.uni-kl.de>
 */
class KBIBTEXDATA_EXPORT Comment : public Element
{
    Q_PROPERTY(QString text READ text WRITE setText)
    Q_PROPERTY(bool useCommand READ useCommand WRITE setUseCommand)

public:
    /**
     * Create a new comment with a given text.
     * @param text comment's textual content
     * @param useCommand mark this comment to use BibTeX's comment command
     */
    explicit Comment(const QString &text = QString(), bool useCommand = false);

    /**
     * Copy constructor cloning another comment object.
     * @param other comment object to clone
     */
    Comment(const Comment &other);

    ~Comment() override;

    /**
     * Assignment operator, working similar to a copy constructor,
     * but overwrites the current object's values.
     */
    Comment &operator= (const Comment &other);

    /**
     * Retrieve the text of this comment.
     * @return text of this comment
     */
    QString text() const;

    /**
     * Set the text of this comment.
     * @param text text of this comment
     */
    void setText(const QString &text);

    /**
     * Retrieve the flag whether to use BibTeX's comment command or not.
     * @return mark if this comment has to use BibTeX's comment command
     */
    bool useCommand() const;

    /**
     * Set the flag whether to use BibTeX's comment command or not.
     * @param useCommand set if this comment has to use BibTeX's comment command
     */
    void setUseCommand(bool useCommand);

    /**
     * Cheap and fast test if another Element is a Comment object.
     * @param other another Element object to test
     * @return true if Element is actually a Comment
     */
    static bool isComment(const Element &other);

private:
    class CommentPrivate;
    CommentPrivate *const d;
};

QDebug operator<<(QDebug dbg, const Comment &comment);

#endif // KBIBTEX_IO_COMMENT_H
