Ignore title parameter for navigator.registerProtocolHandler
[chromium-blink-merge.git] / media / base / user_input_monitor_win.cc
blobe9340d82834f0a89160a670faeaa3094b98e7bec
1 // Copyright 2013 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.
5 #include "media/base/user_input_monitor.h"
7 #include "base/bind.h"
8 #include "base/location.h"
9 #include "base/logging.h"
10 #include "base/message_loop/message_loop.h"
11 #include "base/single_thread_task_runner.h"
12 #include "base/strings/stringprintf.h"
13 #include "base/synchronization/lock.h"
14 #include "base/win/message_window.h"
15 #include "media/base/keyboard_event_counter.h"
16 #include "third_party/skia/include/core/SkPoint.h"
17 #include "ui/events/keycodes/keyboard_code_conversion_win.h"
19 namespace media {
20 namespace {
22 // From the HID Usage Tables specification.
23 const USHORT kGenericDesktopPage = 1;
24 const USHORT kMouseUsage = 2;
25 const USHORT kKeyboardUsage = 6;
27 // This is the actual implementation of event monitoring. It's separated from
28 // UserInputMonitorWin since it needs to be deleted on the UI thread.
29 class UserInputMonitorWinCore
30 : public base::SupportsWeakPtr<UserInputMonitorWinCore>,
31 public base::MessageLoop::DestructionObserver {
32 public:
33 enum EventBitMask {
34 MOUSE_EVENT_MASK = 1,
35 KEYBOARD_EVENT_MASK = 2,
38 explicit UserInputMonitorWinCore(
39 scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
40 const scoped_refptr<UserInputMonitor::MouseListenerList>&
41 mouse_listeners);
42 ~UserInputMonitorWinCore();
44 // DestructionObserver overrides.
45 virtual void WillDestroyCurrentMessageLoop() OVERRIDE;
47 size_t GetKeyPressCount() const;
48 void StartMonitor(EventBitMask type);
49 void StopMonitor(EventBitMask type);
51 private:
52 // Handles WM_INPUT messages.
53 LRESULT OnInput(HRAWINPUT input_handle);
54 // Handles messages received by |window_|.
55 bool HandleMessage(UINT message,
56 WPARAM wparam,
57 LPARAM lparam,
58 LRESULT* result);
59 RAWINPUTDEVICE* GetRawInputDevices(EventBitMask event, DWORD flags);
61 // Task runner on which |window_| is created.
62 scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
63 scoped_refptr<ObserverListThreadSafe<UserInputMonitor::MouseEventListener> >
64 mouse_listeners_;
66 // These members are only accessed on the UI thread.
67 scoped_ptr<base::win::MessageWindow> window_;
68 uint8 events_monitored_;
69 KeyboardEventCounter counter_;
71 DISALLOW_COPY_AND_ASSIGN(UserInputMonitorWinCore);
74 class UserInputMonitorWin : public UserInputMonitor {
75 public:
76 explicit UserInputMonitorWin(
77 const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner);
78 virtual ~UserInputMonitorWin();
80 // Public UserInputMonitor overrides.
81 virtual size_t GetKeyPressCount() const OVERRIDE;
83 private:
84 // Private UserInputMonitor overrides.
85 virtual void StartKeyboardMonitoring() OVERRIDE;
86 virtual void StopKeyboardMonitoring() OVERRIDE;
87 virtual void StartMouseMonitoring() OVERRIDE;
88 virtual void StopMouseMonitoring() OVERRIDE;
90 scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
91 UserInputMonitorWinCore* core_;
93 DISALLOW_COPY_AND_ASSIGN(UserInputMonitorWin);
96 UserInputMonitorWinCore::UserInputMonitorWinCore(
97 scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
98 const scoped_refptr<UserInputMonitor::MouseListenerList>& mouse_listeners)
99 : ui_task_runner_(ui_task_runner),
100 mouse_listeners_(mouse_listeners),
101 events_monitored_(0) {}
103 UserInputMonitorWinCore::~UserInputMonitorWinCore() {
104 DCHECK(!window_);
105 DCHECK(!events_monitored_);
108 void UserInputMonitorWinCore::WillDestroyCurrentMessageLoop() {
109 DCHECK(ui_task_runner_->BelongsToCurrentThread());
110 StopMonitor(MOUSE_EVENT_MASK);
111 StopMonitor(KEYBOARD_EVENT_MASK);
114 size_t UserInputMonitorWinCore::GetKeyPressCount() const {
115 return counter_.GetKeyPressCount();
118 void UserInputMonitorWinCore::StartMonitor(EventBitMask type) {
119 DCHECK(ui_task_runner_->BelongsToCurrentThread());
121 if (events_monitored_ & type)
122 return;
124 if (type == KEYBOARD_EVENT_MASK)
125 counter_.Reset();
127 if (!window_) {
128 window_.reset(new base::win::MessageWindow());
129 if (!window_->Create(base::Bind(&UserInputMonitorWinCore::HandleMessage,
130 base::Unretained(this)))) {
131 LOG_GETLASTERROR(ERROR) << "Failed to create the raw input window";
132 window_.reset();
133 return;
137 // Register to receive raw mouse and/or keyboard input.
138 scoped_ptr<RAWINPUTDEVICE> device(GetRawInputDevices(type, RIDEV_INPUTSINK));
139 if (!RegisterRawInputDevices(device.get(), 1, sizeof(*device))) {
140 LOG_GETLASTERROR(ERROR)
141 << "RegisterRawInputDevices() failed for RIDEV_INPUTSINK";
142 window_.reset();
143 return;
146 // Start observing message loop destruction if we start monitoring the first
147 // event.
148 if (!events_monitored_)
149 base::MessageLoop::current()->AddDestructionObserver(this);
151 events_monitored_ |= type;
154 void UserInputMonitorWinCore::StopMonitor(EventBitMask type) {
155 DCHECK(ui_task_runner_->BelongsToCurrentThread());
157 if (!(events_monitored_ & type))
158 return;
160 // Stop receiving raw input.
161 DCHECK(window_);
162 scoped_ptr<RAWINPUTDEVICE> device(GetRawInputDevices(type, RIDEV_REMOVE));
164 if (!RegisterRawInputDevices(device.get(), 1, sizeof(*device))) {
165 LOG_GETLASTERROR(INFO)
166 << "RegisterRawInputDevices() failed for RIDEV_REMOVE";
169 events_monitored_ &= ~type;
170 if (events_monitored_ == 0) {
171 window_.reset();
173 // Stop observing message loop destruction if no event is being monitored.
174 base::MessageLoop::current()->RemoveDestructionObserver(this);
178 LRESULT UserInputMonitorWinCore::OnInput(HRAWINPUT input_handle) {
179 DCHECK(ui_task_runner_->BelongsToCurrentThread());
181 // Get the size of the input record.
182 UINT size = 0;
183 UINT result = GetRawInputData(
184 input_handle, RID_INPUT, NULL, &size, sizeof(RAWINPUTHEADER));
185 if (result == -1) {
186 LOG_GETLASTERROR(ERROR) << "GetRawInputData() failed";
187 return 0;
189 DCHECK_EQ(0u, result);
191 // Retrieve the input record itself.
192 scoped_ptr<uint8[]> buffer(new uint8[size]);
193 RAWINPUT* input = reinterpret_cast<RAWINPUT*>(buffer.get());
194 result = GetRawInputData(
195 input_handle, RID_INPUT, buffer.get(), &size, sizeof(RAWINPUTHEADER));
196 if (result == -1) {
197 LOG_GETLASTERROR(ERROR) << "GetRawInputData() failed";
198 return 0;
200 DCHECK_EQ(size, result);
202 // Notify the observer about events generated locally.
203 if (input->header.dwType == RIM_TYPEMOUSE && input->header.hDevice != NULL) {
204 POINT position;
205 if (!GetCursorPos(&position)) {
206 position.x = 0;
207 position.y = 0;
209 mouse_listeners_->Notify(
210 &UserInputMonitor::MouseEventListener::OnMouseMoved,
211 SkIPoint::Make(position.x, position.y));
212 } else if (input->header.dwType == RIM_TYPEKEYBOARD &&
213 input->header.hDevice != NULL) {
214 ui::EventType event = (input->data.keyboard.Flags & RI_KEY_BREAK)
215 ? ui::ET_KEY_RELEASED
216 : ui::ET_KEY_PRESSED;
217 ui::KeyboardCode key_code =
218 ui::KeyboardCodeForWindowsKeyCode(input->data.keyboard.VKey);
219 counter_.OnKeyboardEvent(event, key_code);
222 return DefRawInputProc(&input, 1, sizeof(RAWINPUTHEADER));
225 bool UserInputMonitorWinCore::HandleMessage(UINT message,
226 WPARAM wparam,
227 LPARAM lparam,
228 LRESULT* result) {
229 DCHECK(ui_task_runner_->BelongsToCurrentThread());
231 switch (message) {
232 case WM_INPUT:
233 *result = OnInput(reinterpret_cast<HRAWINPUT>(lparam));
234 return true;
236 default:
237 return false;
241 RAWINPUTDEVICE* UserInputMonitorWinCore::GetRawInputDevices(EventBitMask event,
242 DWORD flags) {
243 DCHECK(ui_task_runner_->BelongsToCurrentThread());
245 scoped_ptr<RAWINPUTDEVICE> device(new RAWINPUTDEVICE());
246 if (event == MOUSE_EVENT_MASK) {
247 device->dwFlags = flags;
248 device->usUsagePage = kGenericDesktopPage;
249 device->usUsage = kMouseUsage;
250 device->hwndTarget = window_->hwnd();
251 } else {
252 DCHECK_EQ(KEYBOARD_EVENT_MASK, event);
253 device->dwFlags = flags;
254 device->usUsagePage = kGenericDesktopPage;
255 device->usUsage = kKeyboardUsage;
256 device->hwndTarget = window_->hwnd();
258 return device.release();
262 // Implementation of UserInputMonitorWin.
265 UserInputMonitorWin::UserInputMonitorWin(
266 const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner)
267 : ui_task_runner_(ui_task_runner),
268 core_(new UserInputMonitorWinCore(ui_task_runner, mouse_listeners())) {}
270 UserInputMonitorWin::~UserInputMonitorWin() {
271 if (!ui_task_runner_->DeleteSoon(FROM_HERE, core_))
272 delete core_;
275 size_t UserInputMonitorWin::GetKeyPressCount() const {
276 return core_->GetKeyPressCount();
279 void UserInputMonitorWin::StartKeyboardMonitoring() {
280 ui_task_runner_->PostTask(
281 FROM_HERE,
282 base::Bind(&UserInputMonitorWinCore::StartMonitor,
283 core_->AsWeakPtr(),
284 UserInputMonitorWinCore::KEYBOARD_EVENT_MASK));
287 void UserInputMonitorWin::StopKeyboardMonitoring() {
288 ui_task_runner_->PostTask(
289 FROM_HERE,
290 base::Bind(&UserInputMonitorWinCore::StopMonitor,
291 core_->AsWeakPtr(),
292 UserInputMonitorWinCore::KEYBOARD_EVENT_MASK));
295 void UserInputMonitorWin::StartMouseMonitoring() {
296 ui_task_runner_->PostTask(
297 FROM_HERE,
298 base::Bind(&UserInputMonitorWinCore::StartMonitor,
299 core_->AsWeakPtr(),
300 UserInputMonitorWinCore::MOUSE_EVENT_MASK));
303 void UserInputMonitorWin::StopMouseMonitoring() {
304 ui_task_runner_->PostTask(
305 FROM_HERE,
306 base::Bind(&UserInputMonitorWinCore::StopMonitor,
307 core_->AsWeakPtr(),
308 UserInputMonitorWinCore::MOUSE_EVENT_MASK));
311 } // namespace
313 scoped_ptr<UserInputMonitor> UserInputMonitor::Create(
314 const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
315 const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner) {
316 return scoped_ptr<UserInputMonitor>(new UserInputMonitorWin(ui_task_runner));
319 } // namespace media