mirror of
https://github.com/RGBCube/serenity
synced 2025-05-20 05:55:08 +00:00
160bda7228
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
/*
|
|
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
|
|
* Copyright (c) 2022, the SerenityOS developers.
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "KeypadValue.h"
|
|
#include <AK/String.h>
|
|
|
|
// This type implements number typing and
|
|
// displaying mechanics. It does not perform
|
|
// any arithmetic operations or anything on
|
|
// the values it deals with.
|
|
|
|
class Keypad final {
|
|
public:
|
|
Keypad() = default;
|
|
~Keypad() = default;
|
|
|
|
void type_digit(int digit);
|
|
void type_decimal_point();
|
|
void type_backspace();
|
|
|
|
KeypadValue value() const;
|
|
void set_value(KeypadValue);
|
|
|
|
String to_string() const;
|
|
|
|
private:
|
|
// Internal representation of the current decimal value.
|
|
bool m_negative { false };
|
|
Checked<u64> m_int_value { 0 };
|
|
Checked<u64> m_frac_value { 0 };
|
|
u8 m_frac_length { 0 };
|
|
// E.g. for -35.004200,
|
|
// m_negative = true
|
|
// m_int_value = 35
|
|
// m_frac_value = 4200
|
|
// m_frac_length = 6
|
|
|
|
enum class State {
|
|
External,
|
|
TypingInteger,
|
|
TypingDecimal
|
|
};
|
|
|
|
State m_state { State::External };
|
|
};
|