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// Copyright (c) 2011 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 CONTENT_BROWSER_GAMEPAD_DATA_FETCHER_MAC_H_
#define CONTENT_BROWSER_GAMEPAD_DATA_FETCHER_MAC_H_
#include "build/build_config.h"
#include "base/compiler_specific.h"
#include "base/mac/scoped_cftyperef.h"
#include "content/browser/gamepad/data_fetcher.h"
#include "content/common/gamepad_hardware_buffer.h"
#include <CoreFoundation/CoreFoundation.h>
#include <IOKit/hid/IOHIDManager.h>
#if defined(__OBJC__)
@class NSArray;
#else
class NSArray;
#endif
namespace content {
class GamepadDataFetcherMac : public GamepadDataFetcher {
public:
GamepadDataFetcherMac();
virtual ~GamepadDataFetcherMac();
virtual void GetGamepadData(WebKit::WebGamepads* pads,
bool devices_changed_hint) OVERRIDE;
virtual void PauseHint(bool paused) OVERRIDE;
private:
bool enabled_;
base::mac::ScopedCFTypeRef<IOHIDManagerRef> hid_manager_ref_;
static GamepadDataFetcherMac* InstanceFromContext(void* context);
static void DeviceAddCallback(void* context,
IOReturn result,
void* sender,
IOHIDDeviceRef ref);
static void DeviceRemoveCallback(void* context,
IOReturn result,
void* sender,
IOHIDDeviceRef ref);
static void ValueChangedCallback(void* context,
IOReturn result,
void* sender,
IOHIDValueRef ref);
void DeviceAdd(IOHIDDeviceRef device);
void AddButtonsAndAxes(NSArray* elements, size_t slot);
void DeviceRemove(IOHIDDeviceRef device);
void ValueChanged(IOHIDValueRef value);
void RegisterForNotifications();
void UnregisterFromNotifications();
WebKit::WebGamepads data_;
// Side-band data that's not passed to the consumer, but we need to maintain
// to update data_.
struct AssociatedData {
IOHIDDeviceRef device_ref;
IOHIDElementRef button_elements[WebKit::WebGamepad::buttonsLengthCap];
IOHIDElementRef axis_elements[WebKit::WebGamepad::buttonsLengthCap];
CFIndex axis_minimums[WebKit::WebGamepad::axesLengthCap];
CFIndex axis_maximums[WebKit::WebGamepad::axesLengthCap];
};
AssociatedData associated_[WebKit::WebGamepads::itemsLengthCap];
};
} // namespace content
#endif // CONTENT_BROWSER_GAMEPAD_DATA_FETCHER_MAC_H_
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