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content / public / browser / render_frame_metadata_provider.h [blame]
// 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_PUBLIC_BROWSER_RENDER_FRAME_METADATA_PROVIDER_H_
#define CONTENT_PUBLIC_BROWSER_RENDER_FRAME_METADATA_PROVIDER_H_
#include "base/time/time.h"
#include "build/build_config.h"
#include "cc/trees/render_frame_metadata.h"
#include "content/common/content_export.h"
namespace content {
// Notifies all Observer of the submission of CompositorFrames which cause a
// change in RenderFrameMetadata.
//
// When ReportAllFrameSubmissionsForTesting(true) is called, this will be
// notified of all frame submissions.
//
// An Observer is provided, so that multiple sources can all observe the
// metadata for a given RenderWidgetHost.
class CONTENT_EXPORT RenderFrameMetadataProvider {
public:
// Observer which is notified when RenderFrameMetadata has changed. This is
// also notified of all frame submissions if
// RenderFrameMetadataProvider::ReportAllFrameSubmissionsForTesting(true) has
// been called.
class Observer {
public:
virtual ~Observer() {}
virtual void OnRenderFrameMetadataChangedBeforeActivation(
const cc::RenderFrameMetadata& metadata) = 0;
virtual void OnRenderFrameMetadataChangedAfterActivation(
base::TimeTicks activation_time) = 0;
virtual void OnRenderFrameSubmission() = 0;
// Called to indicate that the viz::LocalSurfaceId within the
// RenderFrameMetadata has changed. Note that this is called as
// soon as |metadata| arrives and does not wait for the frame token
// to pass in Viz.
virtual void OnLocalSurfaceIdChanged(
const cc::RenderFrameMetadata& metadata) = 0;
#if BUILDFLAG(IS_ANDROID)
virtual void OnRootScrollOffsetChanged(
const gfx::PointF& root_scroll_offset) {}
#endif
};
RenderFrameMetadataProvider() = default;
RenderFrameMetadataProvider(const RenderFrameMetadataProvider&) = delete;
RenderFrameMetadataProvider& operator=(const RenderFrameMetadataProvider&) =
delete;
virtual ~RenderFrameMetadataProvider() = default;
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
virtual const cc::RenderFrameMetadata& LastRenderFrameMetadata() = 0;
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_RENDER_FRAME_METADATA_PROVIDER_H_