/*
 * sxeedit.h - A class for SXE edits that change a node
 * Copyright (C) 2007  Joonas Govenius
 *
 * 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef SXDEMETADATAEDIT_H
#define SXDEMETADATAEDIT_H

#include "sxeedit.h"
#include <QHash>

/*! \brief A class used for storing SXE edits that change nodes in the undo stacks and in the queue of outgoing edits.*/
class SxeRecordEdit : public SxeEdit {
    public:
        /*! \brief The possible keys for record.*/
        enum Key {Parent, PrimaryWeight, Name, Chdata, ReplaceFrom, ReplaceN, ProcessingInstructionTarget, ProcessingInstructionData};

        /*! \brief Constructor
         *  Constructs a SxeRecordEdit for \a node.
         */
        SxeRecordEdit(const QString rid, int version, QHash<Key, QString> changes, bool remote = false);
        /*! \brief Constructor
         *  Parses a SxeRecordEdit from \a sxeElement.
         */
        SxeRecordEdit(const QDomElement &sxeElement, bool remote = true);

        /*! \brief The type of edit.*/
        SxeEdit::EditType type() const;
        /*! \brief The XML (the SXE) representing the edit.*/
        QDomElement xml(QDomDocument &doc) const;
        /*! \brief The version of the edit.*/
        int version() const;
        /*! \brief The keys for the record entries that the edit modifies. */
        QList<Key> keys() const;
        /*! \brief The value that the edit will set for the given record entry. */
        QString value(Key key) const;

        /*! \brief Turns the edit into a no-op.*/
        void nullify();

    private:
        static QString keyToString(Key key);
        
        int version_;
        QHash<Key, QString> changes_;
};

#endif
