////////////////////////////////////////////////////////////////////////////////////////
//
//  Copyright 2026 OVITO GmbH, Germany
//
//  This file is part of OVITO (Open Visualization Tool).
//
//  OVITO is free software; you can redistribute it and/or modify it either under the
//  terms of the GNU General Public License version 3 as published by the Free Software
//  Foundation (the "GPL") or, at your option, under the terms of the MIT License.
//  If you do not alter this notice, a recipient may use your version of this
//  file under either the GPL or the MIT License.
//
//  You should have received a copy of the GPL along with this program in a
//  file LICENSE.GPL.txt.  You should have received a copy of the MIT License along
//  with this program in a file LICENSE.MIT.txt
//
//  This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND,
//  either express or implied. See the GPL or the MIT License for the specific language
//  governing rights and limitations.
//
////////////////////////////////////////////////////////////////////////////////////////

#pragma once

#include <ovito/gui/desktop/GUI.h>

namespace Ovito::AutocompleteEdit {

constexpr static char wordSplitterExpression[] = R"([0-9a-zA-Z\.@\[\]])";

/// Get the current token from the text string.
/// This will fail for strings with nested quotes!
/// Returns the starting index and the length of the token from the original string.
OVITO_GUI_EXPORT std::tuple<qsizetype, qsizetype> getToken(int curserPosition, const QString& expression, const QRegularExpression& splitExpression);

/// Calculates the new cursor position and the new string after successful insertion of completion into expression at the current position.
OVITO_GUI_EXPORT std::tuple<qsizetype, QString> completeExpression(int curserPosition, const QString& expression, const QRegularExpression& splitExpression,
                                                  const QString& completion);

}  // namespace Ovito::AutocompleteEdit
