gamepad_platform_data_fetcher_mac.h revision 90dce4d38c5ff5333bea97d859d4e484e27edf0c 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CONTENT_BROWSER_GAMEPAD_GAMEPAD_PLATFORM_DATA_FETCHER_MAC_H_
6#define CONTENT_BROWSER_GAMEPAD_GAMEPAD_PLATFORM_DATA_FETCHER_MAC_H_
7
8#include "base/basictypes.h"
9#include "base/compiler_specific.h"
10#include "base/mac/scoped_cftyperef.h"
11#include "base/memory/scoped_ptr.h"
12#include "build/build_config.h"
13#include "content/browser/gamepad/gamepad_data_fetcher.h"
14#include "content/browser/gamepad/gamepad_standard_mappings.h"
15#include "content/browser/gamepad/xbox_data_fetcher_mac.h"
16#include "content/common/gamepad_hardware_buffer.h"
17#include "third_party/WebKit/Source/Platform/chromium/public/WebGamepads.h"
18
19#include <CoreFoundation/CoreFoundation.h>
20#include <IOKit/hid/IOHIDManager.h>
21
22#if defined(__OBJC__)
23@class NSArray;
24#else
25class NSArray;
26#endif
27
28namespace content {
29
30class GamepadPlatformDataFetcherMac : public GamepadDataFetcher,
31                                      public XboxDataFetcher::Delegate {
32 public:
33  GamepadPlatformDataFetcherMac();
34  virtual ~GamepadPlatformDataFetcherMac();
35  virtual void GetGamepadData(WebKit::WebGamepads* pads,
36                              bool devices_changed_hint) OVERRIDE;
37  virtual void PauseHint(bool paused) OVERRIDE;
38
39 private:
40  bool enabled_;
41  base::mac::ScopedCFTypeRef<IOHIDManagerRef> hid_manager_ref_;
42
43  static GamepadPlatformDataFetcherMac* InstanceFromContext(void* context);
44  static void DeviceAddCallback(void* context,
45                                IOReturn result,
46                                void* sender,
47                                IOHIDDeviceRef ref);
48  static void DeviceRemoveCallback(void* context,
49                                   IOReturn result,
50                                   void* sender,
51                                   IOHIDDeviceRef ref);
52  static void ValueChangedCallback(void* context,
53                                   IOReturn result,
54                                   void* sender,
55                                   IOHIDValueRef ref);
56
57  size_t GetEmptySlot();
58  size_t GetSlotForDevice(IOHIDDeviceRef device);
59  size_t GetSlotForXboxDevice(XboxController* device);
60
61  void DeviceAdd(IOHIDDeviceRef device);
62  void AddButtonsAndAxes(NSArray* elements, size_t slot);
63  void DeviceRemove(IOHIDDeviceRef device);
64  void ValueChanged(IOHIDValueRef value);
65
66  virtual void XboxDeviceAdd(XboxController* device) OVERRIDE;
67  virtual void XboxDeviceRemove(XboxController* device) OVERRIDE;
68  virtual void XboxValueChanged(XboxController* device,
69                                const XboxController::Data& data) OVERRIDE;
70
71  void RegisterForNotifications();
72  void UnregisterFromNotifications();
73
74  scoped_ptr<XboxDataFetcher> xbox_fetcher_;
75
76  WebKit::WebGamepads data_;
77
78  // Side-band data that's not passed to the consumer, but we need to maintain
79  // to update data_.
80  struct AssociatedData {
81    bool is_xbox;
82    union {
83      struct {
84        IOHIDDeviceRef device_ref;
85        IOHIDElementRef button_elements[WebKit::WebGamepad::buttonsLengthCap];
86        IOHIDElementRef axis_elements[WebKit::WebGamepad::buttonsLengthCap];
87        CFIndex axis_minimums[WebKit::WebGamepad::axesLengthCap];
88        CFIndex axis_maximums[WebKit::WebGamepad::axesLengthCap];
89        // Function to map from device data to standard layout, if available.
90        // May be null if no mapping is available.
91        GamepadStandardMappingFunction mapper;
92      } hid;
93      struct {
94        XboxController* device;
95        UInt32 location_id;
96      } xbox;
97    };
98  };
99  AssociatedData associated_[WebKit::WebGamepads::itemsLengthCap];
100
101  DISALLOW_COPY_AND_ASSIGN(GamepadPlatformDataFetcherMac);
102};
103
104}  // namespace content
105
106#endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_PLATFORM_DATA_FETCHER_MAC_H_
107