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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.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_MEDIA_VIDEO_WAKE_LOCK_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_MEDIA_VIDEO_WAKE_LOCK_H_
#include "mojo/public/cpp/bindings/remote.h"
#include "services/device/public/mojom/wake_lock.mojom-blink.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/events/native_event_listener.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_state_observer.h"
#include "third_party/blink/renderer/core/html/media/remote_playback_observer.h"
#include "third_party/blink/renderer/core/page/page_visibility_observer.h"
namespace blink {
class HTMLVideoElement;
// This is implementing the wake lock logic related to a video element. It will
// take wake lock iif:
// - the video is playing;
// - the page is visible OR the video is in picture-in-picture;
// - the video isn't being remoted;
// - the execution context is neither paused nor destroyed.
// Each video element implements its own wake lock logic. The service will then
// merge all the requests and take the appropriate system wake lock.
// VideoWakeLock only uses "screen" related wake lock: it prevents the screen
// from locking on mobile or the lockscreen to show up on desktop.
class CORE_EXPORT VideoWakeLock final
: public NativeEventListener,
public PageVisibilityObserver,
public RemotePlaybackObserver,
public ExecutionContextLifecycleStateObserver {
USING_GARBAGE_COLLECTED_MIXIN(VideoWakeLock);
public:
explicit VideoWakeLock(HTMLVideoElement&);
void ElementDidMoveToNewDocument();
void Trace(Visitor*) final;
// EventListener implementation.
void Invoke(ExecutionContext*, Event*) final;
// RemotePlaybackObserver implementation.
void OnRemotePlaybackStateChanged(
mojom::blink::PresentationConnectionState) final;
// ExecutionContextLifecycleStateObserver
void ContextLifecycleStateChanged(mojom::FrameLifecycleState) override;
void ContextDestroyed() override;
bool active_for_tests() const { return active_; }
private:
// PageVisibilityObserver implementation.
void PageVisibilityChanged() final;
// Called when any state is changed. Will update active state and notify the
// service if needed.
void Update();
// Return whether the wake lock should be active given the current state.
bool ShouldBeActive() const;
// Create a mojo pointer to the wake lock service if possible.
void EnsureWakeLockService();
// Called when the service is no longer connected.
void OnConnectionError();
// Notify the wake lock service of the current wake lock state.
void UpdateWakeLockService();
HTMLVideoElement& VideoElement() { return *video_element_; }
const HTMLVideoElement& VideoElement() const { return *video_element_; }
// `video_element_` owns |this|.
Member<HTMLVideoElement> video_element_;
mojo::Remote<device::mojom::blink::WakeLock> wake_lock_service_;
bool playing_ = false;
bool active_ = false;
mojom::blink::PresentationConnectionState remote_playback_state_ =
mojom::blink::PresentationConnectionState::CLOSED;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_MEDIA_VIDEO_WAKE_LOCK_H_
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