Backup.h

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/Support/XML/Backup.h
//! @brief     Defines GUI::Util namespace
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2021
//! @authors   Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
//  ************************************************************************************************
 
#ifndef BORNAGAIN_GUI_SUPPORT_XML_BACKUP_H
#define BORNAGAIN_GUI_SUPPORT_XML_BACKUP_H
 
#include "Base/Util/Assert.h"
#include "GUI/Support/XML/Streamer.h"
 
namespace GUI::Util {
 
template <typename T>
QByteArray createBackup(const T* t)
{
    QByteArray backup;
    QXmlStreamWriter w(&backup);
    w.writeStartElement("backup");
    Streamer s(&w);
    const_cast<T*>(t)->serialize(s);
    w.writeEndElement();
    return backup;
}
 
template <typename T>
void restoreBackup(T* t, const QByteArray& backup)
{
    QXmlStreamReader r(backup);
    Streamer sr(&r);
    r.readNextStartElement();
    ASSERT(r.name() == "backup");
    t->serialize(sr);
}
 
template <typename T>
void copyContents(const T* source, T* dest)
{
    GUI::Util::restoreBackup(dest, GUI::Util::createBackup(source));
}
 
} // namespace GUI::Util
 
#endif // BORNAGAIN_GUI_SUPPORT_XML_BACKUP_H