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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <memory>
#include <string>
#include <unordered_map>
#include <vector>
#include "input_common/gcadapter/gc_poller.h"
#include "input_common/settings.h"
namespace Common {
class ParamPackage;
}
namespace InputCommon {
namespace Polling {
enum class DeviceType { Button, AnalogPreferred };
/**
* A class that can be used to get inputs from an input device like controllers without having to
* poll the device's status yourself
*/
class DevicePoller {
public:
virtual ~DevicePoller() = default;
/// Setup and start polling for inputs, should be called before GetNextInput
/// If a device_id is provided, events should be filtered to only include events from this
/// device id
virtual void Start(const std::string& device_id = "") = 0;
/// Stop polling
virtual void Stop() = 0;
/**
* Every call to this function returns the next input recorded since calling Start
* @return A ParamPackage of the recorded input, which can be used to create an InputDevice.
* If there has been no input, the package is empty
*/
virtual Common::ParamPackage GetNextInput() = 0;
};
} // namespace Polling
class GCAnalogFactory;
class GCButtonFactory;
class Keyboard;
class MotionEmu;
/**
* Given a ParamPackage for a Device returned from `GetInputDevices`, attempt to get the default
* mapping for the device. This is currently only implemented for the SDL backend devices.
*/
using AnalogMapping = std::unordered_map<Settings::NativeAnalog::Values, Common::ParamPackage>;
using ButtonMapping = std::unordered_map<Settings::NativeButton::Values, Common::ParamPackage>;
class InputSubsystem {
public:
explicit InputSubsystem();
~InputSubsystem();
InputSubsystem(const InputSubsystem&) = delete;
InputSubsystem& operator=(const InputSubsystem&) = delete;
InputSubsystem(InputSubsystem&&) = delete;
InputSubsystem& operator=(InputSubsystem&&) = delete;
/// Initializes and registers all built-in input device factories.
void Initialize();
/// Unregisters all built-in input device factories and shuts them down.
void Shutdown();
/// Retrieves the underlying keyboard device.
[[nodiscard]] Keyboard* GetKeyboard();
/// Retrieves the underlying keyboard device.
[[nodiscard]] const Keyboard* GetKeyboard() const;
/// Retrieves the underlying motion emulation factory.
[[nodiscard]] MotionEmu* GetMotionEmu();
/// Retrieves the underlying motion emulation factory.
[[nodiscard]] const MotionEmu* GetMotionEmu() const;
/**
* Returns all available input devices that this Factory can create a new device with.
* Each returned ParamPackage should have a `display` field used for display, a class field for
* backends to determine if this backend is meant to service the request and any other
* information needed to identify this in the backend later.
*/
[[nodiscard]] std::vector<Common::ParamPackage> GetInputDevices() const;
/// Retrieves the analog mappings for the given device.
[[nodiscard]] AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& device) const;
/// Retrieves the button mappings for the given device.
[[nodiscard]] ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& device) const;
/// Retrieves the underlying GameCube analog handler.
[[nodiscard]] GCAnalogFactory* GetGCAnalogs();
/// Retrieves the underlying GameCube analog handler.
[[nodiscard]] const GCAnalogFactory* GetGCAnalogs() const;
/// Retrieves the underlying GameCube button handler.
[[nodiscard]] GCButtonFactory* GetGCButtons();
/// Retrieves the underlying GameCube button handler.
[[nodiscard]] const GCButtonFactory* GetGCButtons() const;
/// Get all DevicePoller from all backends for a specific device type
[[nodiscard]] std::vector<std::unique_ptr<Polling::DevicePoller>> GetPollers(
Polling::DeviceType type) const;
private:
struct Impl;
std::unique_ptr<Impl> impl;
};
/// Generates a serialized param package for creating a keyboard button device
std::string GenerateKeyboardParam(int key_code);
/// Generates a serialized param package for creating an analog device taking input from keyboard
std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left, int key_right,
int key_modifier, float modifier_scale);
} // namespace InputCommon
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