content/browser/renderer_host/render_frame_metadata_provider_impl.cc

// 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 "content/browser/renderer_host/render_frame_metadata_provider_impl.h"

#include "base/bind.h"
#include "content/browser/renderer_host/frame_token_message_queue.h"

namespace content {

RenderFrameMetadataProviderImpl::RenderFrameMetadataProviderImpl(
    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
    FrameTokenMessageQueue* frame_token_message_queue)
    : task_runner_(task_runner),
      frame_token_message_queue_(frame_token_message_queue) {}

RenderFrameMetadataProviderImpl::~RenderFrameMetadataProviderImpl() = default;

void RenderFrameMetadataProviderImpl::AddObserver(Observer* observer) {
  observers_.AddObserver(observer);
}

void RenderFrameMetadataProviderImpl::RemoveObserver(Observer* observer) {
  observers_.RemoveObserver(observer);
}

void RenderFrameMetadataProviderImpl::Bind(
    mojo::PendingReceiver<mojom::RenderFrameMetadataObserverClient>
        client_receiver,
    mojo::PendingRemote<mojom::RenderFrameMetadataObserver> observer) {
  render_frame_metadata_observer_remote_.reset();
  render_frame_metadata_observer_remote_.Bind(std::move(observer));
  render_frame_metadata_observer_client_receiver_.reset();
  render_frame_metadata_observer_client_receiver_.Bind(
      std::move(client_receiver), task_runner_);

#if defined(OS_ANDROID)
  if (pending_report_all_root_scrolls_for_accessibility_.has_value()) {
    ReportAllRootScrollsForAccessibility(
        *pending_report_all_root_scrolls_for_accessibility_);
    pending_report_all_root_scrolls_for_accessibility_.reset();
  }
#endif
  if (pending_report_all_frame_submission_for_testing_.has_value()) {
    ReportAllFrameSubmissionsForTesting(
        *pending_report_all_frame_submission_for_testing_);
    pending_report_all_frame_submission_for_testing_.reset();
  }
}

#if defined(OS_ANDROID)
void RenderFrameMetadataProviderImpl::ReportAllRootScrollsForAccessibility(
    bool enabled) {
  if (!render_frame_metadata_observer_remote_) {
    pending_report_all_root_scrolls_for_accessibility_ = enabled;
    return;
  }

  render_frame_metadata_observer_remote_->ReportAllRootScrollsForAccessibility(
      enabled);
}
#endif

void RenderFrameMetadataProviderImpl::ReportAllFrameSubmissionsForTesting(
    bool enabled) {
  if (!render_frame_metadata_observer_remote_) {
    pending_report_all_frame_submission_for_testing_ = enabled;
    return;
  }

  render_frame_metadata_observer_remote_->ReportAllFrameSubmissionsForTesting(
      enabled);
}

const cc::RenderFrameMetadata&
RenderFrameMetadataProviderImpl::LastRenderFrameMetadata() {
  return last_render_frame_metadata_;
}

void RenderFrameMetadataProviderImpl::
    OnRenderFrameMetadataChangedAfterActivation(
        cc::RenderFrameMetadata metadata) {
  last_render_frame_metadata_ = std::move(metadata);
  for (Observer& observer : observers_)
    observer.OnRenderFrameMetadataChangedAfterActivation();
}

void RenderFrameMetadataProviderImpl::OnFrameTokenFrameSubmissionForTesting() {
  for (Observer& observer : observers_)
    observer.OnRenderFrameSubmission();
}

void RenderFrameMetadataProviderImpl::SetLastRenderFrameMetadataForTest(
    cc::RenderFrameMetadata metadata) {
  last_render_frame_metadata_ = metadata;
}

void RenderFrameMetadataProviderImpl::OnRenderFrameMetadataChanged(
    uint32_t frame_token,
    const cc::RenderFrameMetadata& metadata) {
  for (Observer& observer : observers_)
    observer.OnRenderFrameMetadataChangedBeforeActivation(metadata);

  if (metadata.local_surface_id_allocation !=
      last_local_surface_id_allocation_) {
    last_local_surface_id_allocation_ = metadata.local_surface_id_allocation;
    for (Observer& observer : observers_)
      observer.OnLocalSurfaceIdChanged(metadata);
  }

  if (!frame_token)
    return;

  // Both RenderFrameMetadataProviderImpl and FrameTokenMessageQueue are owned
  // by the same RenderWidgetHostImpl. During shutdown the queue is cleared
  // without running the callbacks.
  frame_token_message_queue_->EnqueueOrRunFrameTokenCallback(
      frame_token,
      base::BindOnce(&RenderFrameMetadataProviderImpl::
                         OnRenderFrameMetadataChangedAfterActivation,
                     weak_factory_.GetWeakPtr(), std::move(metadata)));
}

void RenderFrameMetadataProviderImpl::OnFrameSubmissionForTesting(
    uint32_t frame_token) {
  frame_token_message_queue_->EnqueueOrRunFrameTokenCallback(
      frame_token, base::BindOnce(&RenderFrameMetadataProviderImpl::
                                      OnFrameTokenFrameSubmissionForTesting,
                                  weak_factory_.GetWeakPtr()));
}

}  // namespace content