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https://github.com/mudita/MuditaOS.git
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ef12b04748
Modify calculator behavior according to PO input: * Compute existing equation before entering next operation * Limit digit input to 7 digits * Start each number input from empty input
87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
// Copyright (c) 2017-2021, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#pragma once
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#include <i18n/i18n.hpp>
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#include <utf8/UTF8.hpp>
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namespace gui
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{
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class InputEvent;
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}
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namespace calc
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{
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namespace symbols
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{
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namespace codes
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{
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inline constexpr auto plus = 0x002B;
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inline constexpr auto minus = 0x002D;
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inline constexpr auto division = 0x00F7;
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inline constexpr auto multiplication = 0x00D7;
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inline constexpr auto full_stop = 0x002E;
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inline constexpr auto comma = 0x002C;
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inline constexpr auto equals = 0x003D;
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inline constexpr auto zero = 0x0030;
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} // namespace codes
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namespace strings
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{
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inline constexpr auto plus = "\u002B";
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inline constexpr auto minus = "\u002D";
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inline constexpr auto division = "\u00F7";
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inline constexpr auto multiplication = "\u00D7";
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inline constexpr auto equals = "\u003D";
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inline constexpr auto full_stop = "\u002E";
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inline constexpr auto comma = "\u002C";
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inline constexpr auto asterisk = "\u002A";
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inline constexpr auto solidus = "\u002F";
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inline const std::string &equals_str()
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{
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return utils::translate("app_calculator_equals");
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}
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inline const std::string &decimal_separator_str()
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{
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return utils::translate("app_calculator_decimal_separator");
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}
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inline const std::string &error_str()
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{
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return utils::translate("app_calculator_error");
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}
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} // namespace strings
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} // namespace symbols
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namespace limits
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{
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inline constexpr auto MaxInputLength = 7u;
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inline constexpr auto MaxDecimalDigits = 6u;
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inline constexpr auto VeryLowPrecision = 4;
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inline constexpr auto LowPrecision = 5;
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inline constexpr auto Precision = 6;
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inline constexpr auto HighPrecision = 8;
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inline constexpr auto ExpLength = 1;
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inline constexpr auto MinusExpLength = 2;
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inline constexpr auto MaxStringLength = 7;
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} // namespace limits
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class InputProcessor
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{
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public:
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virtual ~InputProcessor() = default;
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virtual bool handle(const gui::InputEvent &event) = 0;
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virtual void clear() = 0;
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static bool isSymbol(std::uint32_t code) noexcept;
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static bool isOperation(std::uint32_t code) noexcept;
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static bool isDecimalSeparator(std::uint32_t c) noexcept;
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};
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} // namespace calc
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