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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <optional>
#include "input_common/input_engine.h"
namespace InputCommon {
/**
* A touch device factory representing a touch screen. It receives touch events and forward them
* to all touch devices it created.
*/
class TouchScreen final : public InputEngine {
public:
explicit TouchScreen(std::string input_engine_);
/**
* Signals that touch has moved and marks this touch point as active
* @param x new horizontal position
* @param y new vertical position
* @param finger_id of the touch point to be updated
*/
void TouchMoved(float x, float y, std::size_t finger_id);
/**
* Signals and creates a new touch point with this finger id
* @param x starting horizontal position
* @param y starting vertical position
* @param finger_id to be assigned to the new touch point
*/
void TouchPressed(float x, float y, std::size_t finger_id);
/**
* Signals and resets the touch point related to the this finger id
* @param finger_id to be released
*/
void TouchReleased(std::size_t finger_id);
/// Resets the active flag for each touch point
void ClearActiveFlag();
/// Releases all touch that haven't been marked as active
void ReleaseInactiveTouch();
/// Resets all inputs to their initial value
void ReleaseAllTouch();
private:
static constexpr std::size_t MAX_FINGER_COUNT = 16;
struct TouchStatus {
std::size_t finger_id{};
bool is_enabled{};
bool is_active{};
};
std::optional<std::size_t> GetIndexFromFingerId(std::size_t finger_id) const;
std::optional<std::size_t> GetNextFreeIndex() const;
std::array<TouchStatus, MAX_FINGER_COUNT> fingers{};
};
} // namespace InputCommon
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