1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
content / browser / media / media_keys_listener_manager_impl.cc [blame]
// 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.
#include "content/browser/media/media_keys_listener_manager_impl.h"
#include <memory>
#include <utility>
#include "base/metrics/histogram_functions.h"
#include "base/observer_list.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "components/system_media_controls/system_media_controls.h"
#include "content/browser/browser_main_loop.h"
#include "content/browser/media/active_media_session_controller.h"
#include "content/browser/media/system_media_controls_notifier.h"
#include "content/browser/media/web_app_system_media_controls.h"
#include "content/public/common/content_features.h"
#include "media/audio/audio_manager.h"
#include "ui/base/accelerators/accelerator.h"
#include "ui/base/idle/idle.h"
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
#include "content/browser/media/web_app_system_media_controls_manager.h"
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
namespace content {
MediaKeysListenerManagerImpl::ListeningData::ListeningData() = default;
MediaKeysListenerManagerImpl::ListeningData::~ListeningData() = default;
// static
MediaKeysListenerManager* MediaKeysListenerManager::GetInstance() {
if (!BrowserMainLoop::GetInstance())
return nullptr;
return BrowserMainLoop::GetInstance()->media_keys_listener_manager();
}
MediaKeysListenerManagerImpl::MediaKeysListenerManagerImpl() {
DCHECK(!MediaKeysListenerManager::GetInstance());
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
// If instanced system media controls are enabled, create the
// web_app_system_media_controls_manager_ that handles web app related system
// media controls.
if (ShouldUseWebAppSystemMediaControls()) {
web_app_system_media_controls_manager_ =
std::make_unique<WebAppSystemMediaControlsManager>();
web_app_system_media_controls_manager_->Init();
}
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
// Create the single ActiveMediaSessionController that follows the active
// session. It can be unsupported due to feature flag being off or platform
// constraints.
// When instanced system media controls are enabled, this AMSC follows only
// browser related sessions while web app related ones are handled by
// web_app_system_media_controls_manager_.
browser_active_media_session_controller_ =
std::make_unique<ActiveMediaSessionController>(
base::UnguessableToken::Null());
}
MediaKeysListenerManagerImpl::~MediaKeysListenerManagerImpl() = default;
bool MediaKeysListenerManagerImpl::StartWatchingMediaKey(
ui::KeyboardCode key_code,
ui::MediaKeysListener::Delegate* delegate,
base::UnguessableToken web_app_request_id) {
DCHECK(ui::MediaKeysListener::IsMediaKeycode(key_code));
DCHECK(delegate);
StartListeningForMediaKeysIfNecessary();
// We don't want to start watching the key for an
// ActiveMediaSessionController if an ActiveMediaSessionController won't
// receive events.
const bool is_delegate_for_browser =
delegate == browser_active_media_session_controller_.get();
const bool is_delegate_for_pwa = ShouldUseWebAppSystemMediaControls() &&
IsDelegateForWebAppSession(delegate);
const bool is_delegate_an_active_media_session_controller =
is_delegate_for_browser || is_delegate_for_pwa;
const bool should_start_watching =
!is_delegate_an_active_media_session_controller ||
CanActiveMediaSessionControllerReceiveEvents();
// Tell the underlying MediaKeysListener to listen for the key.
if (should_start_watching && media_keys_listener_ &&
!media_keys_listener_->StartWatchingMediaKey(key_code)) {
return false;
}
ListeningData* listening_data = GetOrCreateListeningData(key_code);
// If this is the ActiveMediaSessionController, just update the flag.
if (is_delegate_an_active_media_session_controller) {
// |delegate| should never be for both the browser and a PWA
DCHECK(is_delegate_for_browser != is_delegate_for_pwa);
if (is_delegate_for_browser) {
listening_data->browser_active_media_session_controller_listening = true;
} else if (is_delegate_for_pwa) {
// If token is specified, it's a PWA that's starting to watch for a media
// key. As a result, add it to the PWA list.
DCHECK(web_app_request_id != base::UnguessableToken::Null());
listening_data->listening_web_apps.insert(web_app_request_id);
}
UpdateWhichKeysAreListenedFor();
// Notify test observers if they exist.
if (test_observer_) {
test_observer_->OnStartWatchingMediaKey(is_delegate_for_pwa);
}
return true;
}
// Add the delegate to the list of listening delegates if necessary.
if (!listening_data->listeners.HasObserver(delegate))
listening_data->listeners.AddObserver(delegate);
// Update listeners, as some ActiveMediaSessionController listeners may no
// longer be needed.
UpdateWhichKeysAreListenedFor();
// Notify test observers if they exist.
if (test_observer_) {
test_observer_->OnStartWatchingMediaKey(is_delegate_for_pwa);
}
return true;
}
void MediaKeysListenerManagerImpl::StopWatchingMediaKey(
ui::KeyboardCode key_code,
ui::MediaKeysListener::Delegate* delegate,
base::UnguessableToken web_app_request_id) {
DCHECK(ui::MediaKeysListener::IsMediaKeycode(key_code));
DCHECK(delegate);
StartListeningForMediaKeysIfNecessary();
// Find or create the list of listening delegates for this key code.
ListeningData* listening_data = GetOrCreateListeningData(key_code);
if (delegate == browser_active_media_session_controller_.get()) {
// Update the browser's listening data to remove this delegate.
listening_data->browser_active_media_session_controller_listening = false;
} else if (ShouldUseWebAppSystemMediaControls() &&
IsDelegateForWebAppSession(delegate)) {
// Remove this pwa_request_id from the listening data.
listening_data->listening_web_apps.erase(web_app_request_id);
} else {
listening_data->listeners.RemoveObserver(delegate);
}
UpdateWhichKeysAreListenedFor();
}
void MediaKeysListenerManagerImpl::DisableInternalMediaKeyHandling() {
media_key_handling_enabled_ = false;
UpdateWhichKeysAreListenedFor();
}
void MediaKeysListenerManagerImpl::EnableInternalMediaKeyHandling() {
media_key_handling_enabled_ = true;
UpdateWhichKeysAreListenedFor();
}
void MediaKeysListenerManagerImpl::OnMediaKeysAccelerator(
const ui::Accelerator& accelerator) {
// We should never receive an accelerator that was never registered.
DCHECK(delegate_map_.contains(accelerator.key_code()));
#if BUILDFLAG(IS_APPLE)
// For privacy, we don't want to handle media keys when the system is locked.
// On Windows and Apple platforms, this will happen unless we explicitly
// prevent it.
// TODO(steimel): Consider adding an idle monitor instead and disabling the
// RemoteCommandCenter/SystemMediaTransportControls on lock so that other OS
// apps can take control.
if (ui::CheckIdleStateIsLocked())
return;
#endif
ListeningData* listening_data = delegate_map_[accelerator.key_code()].get();
// If the ActiveMediaSessionController is listening and is allowed to listen,
// notify it of the media key press.
if (listening_data->browser_active_media_session_controller_listening &&
CanActiveMediaSessionControllerReceiveEvents()) {
browser_active_media_session_controller_->OnMediaKeysAccelerator(
accelerator);
return;
}
// Otherwise, notify delegates.
for (auto& delegate : listening_data->listeners)
delegate.OnMediaKeysAccelerator(accelerator);
}
void MediaKeysListenerManagerImpl::SetIsMediaPlaying(bool is_playing) {
is_media_playing_ = is_playing;
}
void MediaKeysListenerManagerImpl::OnNext(
system_media_controls::SystemMediaControls* sender) {
if (ShouldActiveMediaSessionControllerReceiveKey(ui::VKEY_MEDIA_NEXT_TRACK)) {
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
MaybeSendWebAppControlsEvent(WebAppSystemMediaControlsEvent::kPwaSmcNext,
sender);
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
GetControllerForSystemMediaControls(sender)->OnNext();
return;
}
MaybeSendKeyCode(ui::VKEY_MEDIA_NEXT_TRACK);
}
void MediaKeysListenerManagerImpl::OnPrevious(
system_media_controls::SystemMediaControls* sender) {
if (ShouldActiveMediaSessionControllerReceiveKey(ui::VKEY_MEDIA_PREV_TRACK)) {
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
MaybeSendWebAppControlsEvent(
WebAppSystemMediaControlsEvent::kPwaSmcPrevious, sender);
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
GetControllerForSystemMediaControls(sender)->OnPrevious();
return;
}
MaybeSendKeyCode(ui::VKEY_MEDIA_PREV_TRACK);
}
void MediaKeysListenerManagerImpl::OnPlay(
system_media_controls::SystemMediaControls* sender) {
if (ShouldActiveMediaSessionControllerReceiveKey(ui::VKEY_MEDIA_PLAY_PAUSE)) {
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
MaybeSendWebAppControlsEvent(WebAppSystemMediaControlsEvent::kPwaSmcPlay,
sender);
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
GetControllerForSystemMediaControls(sender)->OnPlay();
return;
}
if (!is_media_playing_)
MaybeSendKeyCode(ui::VKEY_MEDIA_PLAY_PAUSE);
}
void MediaKeysListenerManagerImpl::OnPause(
system_media_controls::SystemMediaControls* sender) {
if (ShouldActiveMediaSessionControllerReceiveKey(ui::VKEY_MEDIA_PLAY_PAUSE)) {
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
MaybeSendWebAppControlsEvent(WebAppSystemMediaControlsEvent::kPwaSmcPause,
sender);
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
GetControllerForSystemMediaControls(sender)->OnPause();
return;
}
if (is_media_playing_)
MaybeSendKeyCode(ui::VKEY_MEDIA_PLAY_PAUSE);
}
void MediaKeysListenerManagerImpl::OnPlayPause(
system_media_controls::SystemMediaControls* sender) {
if (ShouldActiveMediaSessionControllerReceiveKey(ui::VKEY_MEDIA_PLAY_PAUSE)) {
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
MaybeSendWebAppControlsEvent(
WebAppSystemMediaControlsEvent::kPwaSmcPlayPause, sender);
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
GetControllerForSystemMediaControls(sender)->OnPlayPause();
return;
}
MaybeSendKeyCode(ui::VKEY_MEDIA_PLAY_PAUSE);
}
void MediaKeysListenerManagerImpl::OnStop(
system_media_controls::SystemMediaControls* sender) {
if (ShouldActiveMediaSessionControllerReceiveKey(ui::VKEY_MEDIA_STOP)) {
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
MaybeSendWebAppControlsEvent(WebAppSystemMediaControlsEvent::kPwaSmcStop,
sender);
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
GetControllerForSystemMediaControls(sender)->OnStop();
return;
}
MaybeSendKeyCode(ui::VKEY_MEDIA_STOP);
}
void MediaKeysListenerManagerImpl::OnSeek(
system_media_controls::SystemMediaControls* sender,
const base::TimeDelta& time) {
if (!CanActiveMediaSessionControllerReceiveEvents())
return;
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
MaybeSendWebAppControlsEvent(WebAppSystemMediaControlsEvent::kPwaSmcSeek,
sender);
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
GetControllerForSystemMediaControls(sender)->OnSeek(time);
}
void MediaKeysListenerManagerImpl::OnSeekTo(
system_media_controls::SystemMediaControls* sender,
const base::TimeDelta& time) {
if (!CanActiveMediaSessionControllerReceiveEvents())
return;
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
MaybeSendWebAppControlsEvent(WebAppSystemMediaControlsEvent::kPwaSmcSeekTo,
sender);
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
GetControllerForSystemMediaControls(sender)->OnSeekTo(time);
}
void MediaKeysListenerManagerImpl::MaybeSendKeyCode(ui::KeyboardCode key_code) {
if (!delegate_map_.contains(key_code))
return;
ui::Accelerator accelerator(key_code, /*modifiers=*/0);
OnMediaKeysAccelerator(accelerator);
}
void MediaKeysListenerManagerImpl::EnsureAuxiliaryServices() {
if (auxiliary_services_started_)
return;
#if BUILDFLAG(IS_APPLE)
// On Apple platforms, we need to initialize the idle monitor in order to
// check if the system is locked.
ui::InitIdleMonitor();
#endif // BUILDFLAG(IS_APPLE)
auxiliary_services_started_ = true;
}
void MediaKeysListenerManagerImpl::StartListeningForMediaKeysIfNecessary() {
if (browser_system_media_controls_ || media_keys_listener_) {
return;
}
#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)) || BUILDFLAG(IS_WIN)
// Create SystemMediaControls with the SingletonHwnd.
browser_system_media_controls_ =
system_media_controls::SystemMediaControls::Create(
media::AudioManager::GetGlobalAppName());
#elif BUILDFLAG(IS_MAC)
browser_system_media_controls_ =
system_media_controls::SystemMediaControls::Create(
/*application_host=*/nullptr);
if (on_system_media_controls_bridge_created_callback_for_testing_) {
browser_system_media_controls_->SetOnBridgeCreatedCallbackForTesting(
std::move(
on_system_media_controls_bridge_created_callback_for_testing_));
}
#endif
if (browser_system_media_controls_) {
browser_system_media_controls_->AddObserver(this);
// Pass Null request ID so this notifier will track the active session, not
// a specific session.
browser_system_media_controls_notifier_ =
std::make_unique<SystemMediaControlsNotifier>(
browser_system_media_controls_.get(),
base::UnguessableToken::Null());
} else {
media_keys_listener_ = ui::MediaKeysListener::Create(
this, ui::MediaKeysListener::Scope::kGlobal);
DCHECK(media_keys_listener_);
}
EnsureAuxiliaryServices();
}
MediaKeysListenerManagerImpl::ListeningData*
MediaKeysListenerManagerImpl::GetOrCreateListeningData(
ui::KeyboardCode key_code) {
auto listening_data_itr = delegate_map_.find(key_code);
if (listening_data_itr == delegate_map_.end()) {
listening_data_itr =
delegate_map_
.insert(std::make_pair(key_code, std::make_unique<ListeningData>()))
.first;
}
return listening_data_itr->second.get();
}
void MediaKeysListenerManagerImpl::UpdateWhichKeysAreListenedFor() {
StartListeningForMediaKeysIfNecessary();
if (browser_system_media_controls_) {
UpdateSystemMediaControlsEnabledControls();
} else {
UpdateMediaKeysListener();
}
}
void MediaKeysListenerManagerImpl::UpdateSystemMediaControlsEnabledControls() {
// This should be safe to call even if nothing is playing - which should
// result in a no-op.
if (browser_system_media_controls_) {
// Update the browser box.
for (const auto& key_code_listening_data : delegate_map_) {
const ui::KeyboardCode& key_code = key_code_listening_data.first;
const ListeningData* listening_data =
key_code_listening_data.second.get();
bool should_enable = ShouldListenToKey(*listening_data);
switch (key_code) {
case ui::VKEY_MEDIA_PLAY_PAUSE:
browser_system_media_controls_->SetIsPlayPauseEnabled(should_enable);
break;
case ui::VKEY_MEDIA_NEXT_TRACK:
browser_system_media_controls_->SetIsNextEnabled(should_enable);
break;
case ui::VKEY_MEDIA_PREV_TRACK:
browser_system_media_controls_->SetIsPreviousEnabled(should_enable);
break;
case ui::VKEY_MEDIA_STOP:
browser_system_media_controls_->SetIsStopEnabled(should_enable);
break;
default:
NOTREACHED_IN_MIGRATION();
}
}
}
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
// This loops over active web app instanced system media controls and updates
// what controls are available on each set of controls.
if (!ShouldUseWebAppSystemMediaControls()) {
return;
}
for (auto* controls :
web_app_system_media_controls_manager_->GetAllControls()) {
system_media_controls::SystemMediaControls* smc =
controls->GetSystemMediaControls();
base::UnguessableToken request_id = controls->GetRequestID();
for (const auto& key_code_listening_data : delegate_map_) {
const ui::KeyboardCode& key_code = key_code_listening_data.first;
const ListeningData* listening_data =
key_code_listening_data.second.get();
// If we don't see this token in the listening_pwas, we should not
// enable it. If we do find the token in the listening_pwas, we will
// enable it.
bool should_enable =
listening_data->listening_web_apps.contains(request_id);
switch (key_code) {
case ui::VKEY_MEDIA_PLAY_PAUSE:
smc->SetIsPlayPauseEnabled(should_enable);
break;
case ui::VKEY_MEDIA_NEXT_TRACK:
smc->SetIsNextEnabled(should_enable);
break;
case ui::VKEY_MEDIA_PREV_TRACK:
smc->SetIsPreviousEnabled(should_enable);
break;
case ui::VKEY_MEDIA_STOP:
smc->SetIsStopEnabled(should_enable);
break;
default:
NOTREACHED_IN_MIGRATION();
}
}
}
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
}
void MediaKeysListenerManagerImpl::UpdateMediaKeysListener() {
DCHECK(media_keys_listener_);
for (const auto& key_code_listening_data : delegate_map_) {
const ui::KeyboardCode& key_code = key_code_listening_data.first;
const ListeningData* listening_data = key_code_listening_data.second.get();
if (ShouldListenToKey(*listening_data))
media_keys_listener_->StartWatchingMediaKey(key_code);
else
media_keys_listener_->StopWatchingMediaKey(key_code);
}
}
bool MediaKeysListenerManagerImpl::ShouldListenToKey(
const ListeningData& listening_data) const {
// TODO(crbug.com/40943399) verify if this needs a PWA check.
return !listening_data.listeners.empty() ||
(listening_data.browser_active_media_session_controller_listening &&
CanActiveMediaSessionControllerReceiveEvents());
}
bool MediaKeysListenerManagerImpl::AnyDelegatesListening() const {
for (const auto& key_code_listening_data : delegate_map_) {
if (!key_code_listening_data.second->listeners.empty())
return true;
}
return false;
}
bool MediaKeysListenerManagerImpl::
CanActiveMediaSessionControllerReceiveEvents() const {
return media_key_handling_enabled_ && !AnyDelegatesListening();
}
bool MediaKeysListenerManagerImpl::ShouldActiveMediaSessionControllerReceiveKey(
ui::KeyboardCode key_code) const {
if (!CanActiveMediaSessionControllerReceiveEvents())
return false;
auto itr = delegate_map_.find(key_code);
if (itr == delegate_map_.end())
return false;
ListeningData* listening_data = itr->second.get();
DCHECK_NE(nullptr, listening_data);
return listening_data->browser_active_media_session_controller_listening ||
(ShouldUseWebAppSystemMediaControls() &&
!listening_data->listening_web_apps.empty());
}
bool MediaKeysListenerManagerImpl::ShouldUseWebAppSystemMediaControls() const {
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
// This feature is enabled by default on Windows, disabled on mac.
return base::FeatureList::IsEnabled(features::kWebAppSystemMediaControls);
#else
return false;
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
}
bool MediaKeysListenerManagerImpl::IsDelegateForWebAppSession(
ui::MediaKeysListener::Delegate* delegate) {
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
std::vector<WebAppSystemMediaControls*> pwa_controls =
web_app_system_media_controls_manager_->GetAllControls();
for (auto* curr_controls : pwa_controls) {
if (curr_controls->GetController() == delegate) {
return true;
}
}
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
return false;
}
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
void MediaKeysListenerManagerImpl::MaybeSendWebAppControlsEvent(
WebAppSystemMediaControlsEvent event,
system_media_controls::SystemMediaControls* sender) {
if (web_app_system_media_controls_manager_ &&
web_app_system_media_controls_manager_
->GetWebAppSystemMediaControlsForSystemMediaControls(sender)) {
// Since the sender is registered with the
// web_app_system_media_controls_manager we're good to go ahead and fire the
// histogram for instanced pwa controls.
base::UmaHistogramEnumeration("WebApp.Media.SystemMediaControls", event);
}
}
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
ActiveMediaSessionController*
MediaKeysListenerManagerImpl::GetControllerForSystemMediaControls(
system_media_controls::SystemMediaControls* system_media_controls) {
// Check if system_media_controls is browser box.
// If kWebAppSystemMediaControls is not supported, we should always use the
// browser controller.
if (!ShouldUseWebAppSystemMediaControls() ||
system_media_controls == browser_system_media_controls_.get()) {
return browser_active_media_session_controller_.get();
}
#if USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
// Ask the manager for the appropriate ActiveMediaSessionController.
WebAppSystemMediaControls* controls =
web_app_system_media_controls_manager_
->GetWebAppSystemMediaControlsForSystemMediaControls(
system_media_controls);
if (controls) {
return controls->GetController();
}
#endif // USE_INSTANCED_SYSTEM_MEDIA_CONTROLS_FOR_WEB_APPS
// It's unexpected that any code asks for the controller for a
// system_media_controls object we don't know about.
NOTREACHED();
}
} // namespace content