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// Copyright 2020 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include "common/common_types.h"
namespace Core {
class System;
}
namespace Core::HID {
enum class NpadButton : u64;
}
namespace Service::HID {
class Controller_NPad;
}
/**
* The InputInterpreter class interfaces with HID to retrieve button press states.
* Input is intended to be polled every 50ms so that a button is considered to be
* held down after 400ms has elapsed since the initial button press and subsequent
* repeated presses occur every 50ms.
*/
class InputInterpreter {
public:
explicit InputInterpreter(Core::System& system);
virtual ~InputInterpreter();
/// Gets a button state from HID and inserts it into the array of button states.
void PollInput();
/// Resets all the button states to their defaults.
void ResetButtonStates();
/**
* Checks whether the button is pressed.
*
* @param button The button to check.
*
* @returns True when the button is pressed.
*/
[[nodiscard]] bool IsButtonPressed(Core::HID::NpadButton button) const;
/**
* Checks whether any of the buttons in the parameter list is pressed.
*
* @tparam HIDButton The buttons to check.
*
* @returns True when at least one of the buttons is pressed.
*/
template <Core::HID::NpadButton... T>
[[nodiscard]] bool IsAnyButtonPressed() {
return (IsButtonPressed(T) || ...);
}
/**
* The specified button is considered to be pressed once
* if it is currently pressed and not pressed previously.
*
* @param button The button to check.
*
* @returns True when the button is pressed once.
*/
[[nodiscard]] bool IsButtonPressedOnce(Core::HID::NpadButton button) const;
/**
* Checks whether any of the buttons in the parameter list is pressed once.
*
* @tparam T The buttons to check.
*
* @returns True when at least one of the buttons is pressed once.
*/
template <Core::HID::NpadButton... T>
[[nodiscard]] bool IsAnyButtonPressedOnce() const {
return (IsButtonPressedOnce(T) || ...);
}
/**
* The specified button is considered to be held down if it is pressed in all 9 button states.
*
* @param button The button to check.
*
* @returns True when the button is held down.
*/
[[nodiscard]] bool IsButtonHeld(Core::HID::NpadButton button) const;
/**
* Checks whether any of the buttons in the parameter list is held down.
*
* @tparam T The buttons to check.
*
* @returns True when at least one of the buttons is held down.
*/
template <Core::HID::NpadButton... T>
[[nodiscard]] bool IsAnyButtonHeld() const {
return (IsButtonHeld(T) || ...);
}
private:
Service::HID::Controller_NPad& npad;
/// Stores 9 consecutive button states polled from HID.
std::array<u32, 9> button_states{};
std::size_t previous_index{};
std::size_t current_index{};
};
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