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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_FRAME_METADATA_PROVIDER_IMPL_H_
#define CONTENT_BROWSER_RENDERER_HOST_RENDER_FRAME_METADATA_PROVIDER_IMPL_H_
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/task/single_thread_task_runner.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "cc/mojom/render_frame_metadata.mojom.h"
#include "content/common/content_export.h"
#include "content/public/browser/render_frame_metadata_provider.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace content {
class FrameTokenMessageQueue;
// Observes RenderFrameMetadata associated with the submission of a frame for a
// given RenderWidgetHost. The renderer will notify this when sumitting a
// CompositorFrame.
//
// When ReportAllFrameSubmissionsForTesting(true) is called, this will be
// notified of all frame submissions.
//
// All RenderFrameMetadataProvider::Observer will be notified.
class CONTENT_EXPORT RenderFrameMetadataProviderImpl
: public RenderFrameMetadataProvider,
public cc::mojom::RenderFrameMetadataObserverClient {
public:
RenderFrameMetadataProviderImpl(
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
FrameTokenMessageQueue* frame_token_message_queue);
RenderFrameMetadataProviderImpl(const RenderFrameMetadataProviderImpl&) =
delete;
RenderFrameMetadataProviderImpl& operator=(
const RenderFrameMetadataProviderImpl&) = delete;
~RenderFrameMetadataProviderImpl() override;
void AddObserver(Observer* observer) override;
void RemoveObserver(Observer* observer) override;
void Bind(
mojo::PendingReceiver<cc::mojom::RenderFrameMetadataObserverClient>
client_receiver,
mojo::PendingRemote<cc::mojom::RenderFrameMetadataObserver> observer);
const cc::RenderFrameMetadata& LastRenderFrameMetadata() override;
#if BUILDFLAG(IS_ANDROID)
// Notifies the renderer of the changes in the notification frequency of the
// root scroll updates, which is needed for accessibility and
// GestureListenerManager on Android.
void UpdateRootScrollOffsetUpdateFrequency(
cc::mojom::RootScrollOffsetUpdateFrequency frequency);
#endif
// Notifies the renderer to begin sending a notification on all frame
// submissions.
void ReportAllFrameSubmissionsForTesting(bool enabled);
// Set |last_render_frame_metadata_| to the given |metadata| for testing
// purpose.
void SetLastRenderFrameMetadataForTest(cc::RenderFrameMetadata metadata);
private:
friend class FakeRenderWidgetHostViewAura;
friend class DelegatedInkPointTest;
friend class RenderWidgetHostViewAndroidTest;
// Paired with the mojom::RenderFrameMetadataObserverClient overrides, these
// methods are enqueued in |frame_token_message_queue_|. They are invoked when
// the browser process receives their associated frame tokens. These then
// notify any |observers_|.
void OnRenderFrameMetadataChangedAfterActivation(
cc::RenderFrameMetadata metadata,
base::TimeTicks activation_time);
void OnFrameTokenFrameSubmissionForTesting(base::TimeTicks activation_time);
// cc::mojom::RenderFrameMetadataObserverClient:
void OnRenderFrameMetadataChanged(
uint32_t frame_token,
const cc::RenderFrameMetadata& metadata) override;
void OnFrameSubmissionForTesting(uint32_t frame_token) override;
#if BUILDFLAG(IS_ANDROID)
void OnRootScrollOffsetChanged(
const gfx::PointF& root_scroll_offset) override;
#endif
base::ObserverList<Observer>::UncheckedAndDanglingUntriaged observers_;
cc::RenderFrameMetadata last_render_frame_metadata_;
std::optional<viz::LocalSurfaceId> last_local_surface_id_;
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
// Not owned.
const raw_ptr<FrameTokenMessageQueue> frame_token_message_queue_;
mojo::Receiver<cc::mojom::RenderFrameMetadataObserverClient>
render_frame_metadata_observer_client_receiver_{this};
mojo::Remote<cc::mojom::RenderFrameMetadataObserver>
render_frame_metadata_observer_remote_;
#if BUILDFLAG(IS_ANDROID)
std::optional<cc::mojom::RootScrollOffsetUpdateFrequency>
pending_root_scroll_offset_update_frequency_;
#endif
std::optional<bool> pending_report_all_frame_submission_for_testing_;
base::WeakPtrFactory<RenderFrameMetadataProviderImpl> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_RENDER_FRAME_METADATA_PROVIDER_IMPL_H_
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