Adding new media controls to MediaNotification

content/browser/media/session/media_session_impl.cc

 // Copyright 2015 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.
 
 #include "content/browser/media/session/media_session_impl.h"
 
 #include "content/browser/media/session/audio_focus_delegate.h"
 #include "content/browser/media/session/media_session_player_observer.h"
+#include "content/browser/media/session/media_session_service_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
+#include "content/public/browser/media_session.h"
+#include "content/public/browser/media_session_observer.h"
 #include "content/public/browser/web_contents.h"
-#include "content/public/browser/web_contents_delegate.h"
 #include "media/base/media_content_type.h"
 
 #if defined(OS_ANDROID)
 #include "content/browser/media/session/media_session_android.h"
 #endif  // defined(OS_ANDROID)
 
 namespace content {
 
 namespace {
 
@@ skipping 54 matching lines @@
 
   // TODO(zqzhang): refactor MediaSessionImpl, maybe move the interface used to
   // talk with AudioFocusManager out to a seperate class. The AudioFocusManager
   // unit tests then could mock the interface and abandon audio focus when
   // WebContents is destroyed. See https://crbug.com/651069
   players_.clear();
   pepper_players_.clear();
   AbandonSystemAudioFocusIfNeeded();
 }
 
+void MediaSessionImpl::SetMediaSessionService(
+    MediaSessionServiceImpl* service) {
+  service_ = service;
+}
+
 void MediaSessionImpl::AddObserver(MediaSessionObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void MediaSessionImpl::RemoveObserver(MediaSessionObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void MediaSessionImpl::SetMetadata(
     const base::Optional<MediaMetadata>& metadata) {
@@ skipping 151 matching lines @@
 
   if (audio_focus_state_ != State::SUSPENDED)
     OnSuspendInternal(suspend_type, State::SUSPENDED);
 
   DCHECK(audio_focus_state_ == State::SUSPENDED);
   players_.clear();
 
   AbandonSystemAudioFocusIfNeeded();
 }
 
+void MediaSessionImpl::DidReceiveAction(
+    blink::mojom::MediaSessionAction action) {
+  if (service_)
+    service_->GetClient()->DidReceiveAction(action);
+}
+
+void MediaSessionImpl::OnMediaSessionEnabledAction(
+    blink::mojom::MediaSessionAction action) {
+  for (auto& observer : observers_)
+    observer.MediaSessionEnabledAction(action);
+}
+
+void MediaSessionImpl::OnMediaSessionDisabledAction(
+    blink::mojom::MediaSessionAction action) {
+  for (auto& observer : observers_)
+    observer.MediaSessionDisabledAction(action);
+}
+
 void MediaSessionImpl::StartDucking() {
   if (is_ducking_)
     return;
   is_ducking_ = true;
   UpdateVolumeMultiplier();
 }
 
 void MediaSessionImpl::StopDucking() {
   if (!is_ducking_)
     return;
@@ skipping 125 matching lines @@
     it.observer->OnSetVolumeMultiplier(it.player_id, GetVolumeMultiplier());
 
   UpdateWebContents();
 }
 
 MediaSessionImpl::MediaSessionImpl(WebContents* web_contents)
     : WebContentsObserver(web_contents),
       audio_focus_state_(State::INACTIVE),
       audio_focus_type_(
           AudioFocusManager::AudioFocusType::GainTransientMayDuck),
-      is_ducking_(false) {
+      is_ducking_(false),
+      service_(nullptr) {
 #if defined(OS_ANDROID)
   session_android_.reset(new MediaSessionAndroid(this));
 #endif  // defined(OS_ANDROID)
 }
 
 void MediaSessionImpl::Initialize() {
   delegate_ = AudioFocusDelegate::Create(this);
 }
 
 bool MediaSessionImpl::RequestSystemAudioFocus(
@@ skipping 50 matching lines @@
   DCHECK(success);
 
   pepper_players_.insert(PlayerIdentifier(observer, player_id));
 
   observer->OnSetVolumeMultiplier(player_id, GetVolumeMultiplier());
 
   return true;
 }
 
 }  // namespace content