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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#pragma once
#include <string>
#include <QPoint>
namespace Terminal::Internal {
class TerminalSurface;
class CellIterator
{
public:
using iterator_category = std::bidirectional_iterator_tag;
using difference_type = std::ptrdiff_t;
using value_type = std::u32string::value_type;
using pointer = std::u32string::value_type *;
// We need to return copies for std::reverse_iterator to work
using reference = std::u32string::value_type;
enum class State { BEGIN, INSIDE, END } m_state{};
public:
CellIterator(const TerminalSurface *surface, QPoint pos);
CellIterator(const TerminalSurface *surface, int pos);
CellIterator(const TerminalSurface *surface);
public:
QPoint gridPos() const;
public:
CellIterator &operator-=(int n);
CellIterator &operator+=(int n);
reference operator*() const { return m_char; }
pointer operator->() { return &m_char; }
CellIterator &operator++() { return *this += 1; }
CellIterator operator++(int)
{
CellIterator tmp = *this;
++(*this);
return tmp;
}
CellIterator &operator--() { return *this -= 1; }
CellIterator operator--(int)
{
CellIterator tmp = *this;
--(*this);
return tmp;
}
bool operator!=(const CellIterator &other) const
{
if (other.m_state != m_state)
return true;
if (other.m_pos != m_pos)
return true;
return false;
}
bool operator==(const CellIterator &other) const { return !operator!=(other); }
CellIterator operator-(int n) const
{
CellIterator result = *this;
result -= n;
return result;
}
CellIterator operator+(int n) const
{
CellIterator result = *this;
result += n;
return result;
}
int position() const { return m_pos; }
void setSkipZeros(bool skipZeros) { m_skipZeros = skipZeros; }
private:
bool updateChar();
const TerminalSurface *m_surface{nullptr};
int m_pos{-1};
int m_maxpos{-1};
bool m_skipZeros{false};
mutable std::u32string::value_type m_char;
};
} // namespace Terminal::Internal
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