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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt for Python.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef INDENTOR_H
#define INDENTOR_H
#include <QtCore/QTextStream>
/**
* Utility class to store the indentation level, use it in a QTextStream.
*/
template <int tabWidth>
class IndentorBase
{
public:
int total() const { return tabWidth * indent; }
int indent = 0;
};
using Indentor = IndentorBase<4>;
using Indentor1 = IndentorBase<1>;
/**
* Class that use the RAII idiom to set and unset the indentation level.
*/
template <int tabWidth>
class IndentationBase
{
public:
using Indentor = IndentorBase<tabWidth>;
IndentationBase(Indentor &indentor, int count = 1) : m_count(count), indentor(indentor)
{
indentor.indent += m_count;
}
~IndentationBase()
{
indentor.indent -= m_count;
}
private:
const int m_count;
Indentor &indentor;
};
using Indentation = IndentationBase<4>;
template <int tabWidth>
inline QTextStream &operator <<(QTextStream &s, const IndentorBase<tabWidth> &indentor)
{
for (int i = 0, total = indentor.total(); i < total; ++i)
s << ' ';
return s;
}
template <int tabWidth>
const char *indent(IndentorBase<tabWidth> &indentor)
{
++indentor.indent;
return "";
}
template <int tabWidth>
const char *outdent(IndentorBase<tabWidth> &indentor)
{
--indentor.indent;
return "";
}
#endif // GENERATOR_H
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