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// Copyright 2018 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 "third_party/blink/renderer/core/html/media/video_wake_lock.h"
#include "third_party/blink/public/common/browser_interface_broker_proxy.h"
#include "third_party/blink/public/mojom/wake_lock/wake_lock.mojom-blink.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/events/event.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/picture_in_picture_controller.h"
#include "third_party/blink/renderer/core/html/media/html_video_element.h"
#include "third_party/blink/renderer/core/html/media/remote_playback_controller.h"
namespace blink {
VideoWakeLock::VideoWakeLock(HTMLVideoElement& video)
: PageVisibilityObserver(video.GetDocument().GetPage()),
ContextLifecycleStateObserver(&video.GetDocument()),
video_element_(video) {
VideoElement().addEventListener(event_type_names::kPlaying, this, true);
VideoElement().addEventListener(event_type_names::kPause, this, true);
VideoElement().addEventListener(event_type_names::kEmptied, this, true);
VideoElement().addEventListener(event_type_names::kEnterpictureinpicture,
this, true);
VideoElement().addEventListener(event_type_names::kLeavepictureinpicture,
this, true);
RemotePlaybackController* remote_playback_controller =
RemotePlaybackController::From(VideoElement());
if (remote_playback_controller)
remote_playback_controller->AddObserver(this);
UpdateStateIfNeeded();
}
void VideoWakeLock::ElementDidMoveToNewDocument() {
ContextLifecycleStateObserver::DidMoveToNewExecutionContext(
&VideoElement().GetDocument());
}
void VideoWakeLock::PageVisibilityChanged() {
Update();
}
void VideoWakeLock::Trace(Visitor* visitor) {
NativeEventListener::Trace(visitor);
PageVisibilityObserver::Trace(visitor);
ContextLifecycleStateObserver::Trace(visitor);
visitor->Trace(video_element_);
}
void VideoWakeLock::Invoke(ExecutionContext*, Event* event) {
if (event->type() == event_type_names::kPlaying) {
playing_ = true;
} else if (event->type() == event_type_names::kPause ||
event->type() == event_type_names::kEmptied) {
// In 4.8.12.5 steps 6.6.1, the media element is paused when a new load
// happens without actually firing a pause event. Because of this, we need
// to listen to the emptied event.
playing_ = false;
} else {
DCHECK(event->type() == event_type_names::kEnterpictureinpicture ||
event->type() == event_type_names::kLeavepictureinpicture);
}
Update();
}
void VideoWakeLock::OnRemotePlaybackStateChanged(
mojom::blink::PresentationConnectionState state) {
remote_playback_state_ = state;
Update();
}
void VideoWakeLock::ContextLifecycleStateChanged(mojom::FrameLifecycleState) {
Update();
}
void VideoWakeLock::ContextDestroyed(ExecutionContext*) {
Update();
}
void VideoWakeLock::Update() {
bool should_be_active = ShouldBeActive();
if (should_be_active == active_)
return;
active_ = should_be_active;
UpdateWakeLockService();
}
bool VideoWakeLock::ShouldBeActive() const {
bool page_visible = GetPage() && GetPage()->IsPageVisible();
bool in_picture_in_picture =
PictureInPictureController::IsElementInPictureInPicture(&VideoElement());
return playing_ && (page_visible || in_picture_in_picture) &&
remote_playback_state_ !=
mojom::blink::PresentationConnectionState::CONNECTED &&
!(VideoElement().GetDocument().IsContextPaused() ||
VideoElement().GetDocument().IsContextDestroyed());
}
void VideoWakeLock::EnsureWakeLockService() {
if (wake_lock_service_)
return;
LocalFrame* frame = VideoElement().GetDocument().GetFrame();
if (!frame)
return;
scoped_refptr<base::SingleThreadTaskRunner> task_runner =
frame->GetTaskRunner(TaskType::kMediaElementEvent);
mojo::Remote<blink::mojom::blink::WakeLockService> service;
frame->GetBrowserInterfaceBroker().GetInterface(
service.BindNewPipeAndPassReceiver(task_runner));
service->GetWakeLock(device::mojom::WakeLockType::kPreventDisplaySleep,
device::mojom::blink::WakeLockReason::kVideoPlayback,
"Video Wake Lock",
wake_lock_service_.BindNewPipeAndPassReceiver());
wake_lock_service_.set_disconnect_handler(
WTF::Bind(&VideoWakeLock::OnConnectionError, WrapWeakPersistent(this)));
}
void VideoWakeLock::OnConnectionError() {
wake_lock_service_.reset();
}
void VideoWakeLock::UpdateWakeLockService() {
EnsureWakeLockService();
if (!wake_lock_service_)
return;
if (active_)
wake_lock_service_->RequestWakeLock();
else
wake_lock_service_->CancelWakeLock();
}
} // namespace blink
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