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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_EXO_GAMING_SEAT_H_
#define COMPONENTS_EXO_GAMING_SEAT_H_
#include <memory>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/sequenced_task_runner.h"
#include "base/synchronization/lock.h"
#include "base/threading/thread.h"
#include "base/threading/thread_task_runner_handle.h"
#include "components/exo/wm_helper.h"
#include "device/gamepad/gamepad_data_fetcher.h"
#include "ui/aura/client/focus_change_observer.h"
namespace exo {
class GamingSeatDelegate;
class GamepadDelegate;
using CreateGamepadDataFetcherCallback =
base::Callback<std::unique_ptr<device::GamepadDataFetcher>()>;
// This class represents one gaming seat, it uses a background thread
// for polling gamepad devices and notifies the corresponding GampadDelegate of
// any changes.
class GamingSeat : public WMHelper::FocusObserver {
public:
// This class will post tasks to invoke the delegate on the thread runner
// which is associated with the thread that is creating this instance.
GamingSeat(GamingSeatDelegate* gaming_seat_delegate,
base::SingleThreadTaskRunner* polling_task_runner);
// Allows test cases to specify a CreateGamepadDataFetcherCallback that
// overrides the default GamepadPlatformDataFetcher.
GamingSeat(GamingSeatDelegate* gaming_seat_delegate,
base::SingleThreadTaskRunner* polling_task_runner,
CreateGamepadDataFetcherCallback create_fetcher_callback);
~GamingSeat() override;
// Overridden WMHelper::FocusObserver:
void OnWindowFocused(aura::Window* gained_focus,
aura::Window* lost_focus) override;
private:
class ThreadSafeGamepadChangeFetcher;
// Processes updates of gamepad data and passes changes on to delegate.
void ProcessGamepadChanges(int index, const blink::WebGamepad new_pad);
// Private implementation of methods and resources that are used on the
// polling thread.
scoped_refptr<ThreadSafeGamepadChangeFetcher> gamepad_change_fetcher_;
// The delegate that handles gamepad_added.
GamingSeatDelegate* const delegate_;
// The delegate instances that all other events are dispatched to.
GamepadDelegate* gamepad_delegates_[blink::WebGamepads::itemsLengthCap];
// The current state of the gamepad represented by this instance.
blink::WebGamepads pad_state_;
// ThreadChecker for the origin thread.
base::ThreadChecker thread_checker_;
base::WeakPtrFactory<GamingSeat> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(GamingSeat);
};
} // namespace exo
#endif // COMPONENTS_EXO_GAMING_SEAT_H_
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