nintendo_data_fetcher.h | Explore in Territory

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef DEVICE_GAMEPAD_NINTENDO_DATA_FETCHER_H_
#define DEVICE_GAMEPAD_NINTENDO_DATA_FETCHER_H_

#include <memory>
#include <string>
#include <unordered_map>

#include "base/memory/weak_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "device/gamepad/gamepad_data_fetcher.h"
#include "device/gamepad/nintendo_controller.h"
#include "device/gamepad/public/cpp/gamepads.h"
#include "mojo/public/cpp/bindings/associated_receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/device/public/mojom/hid.mojom-forward.h"

namespace device {
// Nintendo controllers are not typical HID gamepads and cannot be easily
// supported through the platform data fetchers. However, when they are HID
// devices we can use the HID backend to enumerate and initialize them.
//
// NintendoDataFetcher currently supports only Nintendo Switch devices:
// * Switch Joy-Con L
// * Switch Joy-Con R
//   - A pair of matching Joy-Cons may be associated to form a single gamepad.
// * Switch Pro Controller
//   - Supports USB and Bluetooth.
// * Switch Joy-Con Charging Grip
//   - Connects over USB and charges Joy-Cons.
//   - Can hold a pair of matching Joy-Cons to form a single gamepad.
//   - One or both Joy-Cons may be disconnected.
//
// When multiple Joy-Cons are connected, they are automatically associated to
// form a composite gamepad if:
// * The Joy-Cons form a matching pair (Joy-Con L and Joy-Con R).
// * They are connected using the same bus type (both Bluetooth or both USB).
// * Neither Joy-Con is already part of a composite gamepad.
// The composite gamepad functions identically to a Switch Pro Controller and
// exposes the same vendor and device ID but a different product name.
class DEVICE_GAMEPAD_EXPORT NintendoDataFetcher : public GamepadDataFetcher,
                                                  mojom::HidManagerClient { … };

}  // namespace device

#endif  // DEVICE_GAMEPAD_NINTENDO_DATA_FETCHER_H_
chromium/device/gamepad/nintendo_data_fetcher.h
