fuchsia_web/webengine/renderer/web_engine_content_renderer_client.h

// 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 FUCHSIA_WEB_WEBENGINE_RENDERER_WEB_ENGINE_CONTENT_RENDERER_CLIENT_H_
#define FUCHSIA_WEB_WEBENGINE_RENDERER_WEB_ENGINE_CONTENT_RENDERER_CLIENT_H_

#include <memory>

#include "base/memory/scoped_refptr.h"
#include "base/synchronization/lock.h"
#include "base/thread_annotations.h"
#include "build/chromecast_buildflags.h"
#include "components/url_rewrite/common/url_request_rewrite_rules.h"
#include "content/public/renderer/content_renderer_client.h"
#include "fuchsia_web/webengine/renderer/web_engine_audio_device_factory.h"
#include "fuchsia_web/webengine/renderer/web_engine_render_frame_observer.h"
#include "third_party/blink/public/common/tokens/tokens.h"
#include "third_party/blink/public/platform/url_loader_throttle_provider.h"

#if BUILDFLAG(ENABLE_CAST_RECEIVER)
namespace cast_streaming {
class ResourceProvider;
}
#endif

namespace memory_pressure {
class MultiSourceMemoryPressureMonitor;
}  // namespace memory_pressure

class WebEngineContentRendererClient : public content::ContentRendererClient {
 public:
  WebEngineContentRendererClient();

  WebEngineContentRendererClient(const WebEngineContentRendererClient&) =
      delete;
  WebEngineContentRendererClient& operator=(
      const WebEngineContentRendererClient&) = delete;

  ~WebEngineContentRendererClient() override;

  // Returns the UrlRequestRewriteRules corresponding to `frame_token`.
  scoped_refptr<url_rewrite::UrlRequestRewriteRules>
  GetRewriteRulesForFrameToken(const blink::LocalFrameToken& frame_token) const;

 private:
  // Called by WebEngineRenderFrameObserver when its corresponding RenderFrame
  // is in the process of being deleted.
  void OnRenderFrameDeleted(const blink::LocalFrameToken& frame_token);

  // content::ContentRendererClient overrides.
  void RenderThreadStarted() override;
  void RenderFrameCreated(content::RenderFrame* render_frame) override;
  std::unique_ptr<media::KeySystemSupportRegistration> GetSupportedKeySystems(
      content::RenderFrame* render_frame,
      media::GetSupportedKeySystemsCB cb) override;
  bool IsDecoderSupportedVideoType(const media::VideoType& type) override;
  std::unique_ptr<blink::URLLoaderThrottleProvider>
  CreateURLLoaderThrottleProvider(
      blink::URLLoaderThrottleProviderType type) override;
  bool DeferMediaLoad(content::RenderFrame* render_frame,
                      bool has_played_media_before,
                      base::OnceClosure closure) override;
  std::unique_ptr<media::RendererFactory> GetBaseRendererFactory(
      content::RenderFrame* render_frame,
      media::MediaLog* media_log,
      media::DecoderFactory* decoder_factory,
      base::RepeatingCallback<media::GpuVideoAcceleratorFactories*()>
          get_gpu_factories_cb,
      int element_id) override;

#if BUILDFLAG(ENABLE_CAST_RECEIVER)
  std::unique_ptr<cast_streaming::ResourceProvider>
  CreateCastStreamingResourceProvider() override;
#endif

  bool RunClosureWhenInForeground(content::RenderFrame* render_frame,
                                  base::OnceClosure closure);

  // Overrides the default Content/Blink audio pipeline, to allow Renderers to
  // use the AudioConsumer service directly.
  WebEngineAudioDeviceFactory audio_device_factory_;

  mutable base::Lock observer_map_lock_;

  // Map of `blink::LocalFrameToken` to WebEngineRenderFrameObserver.
  std::map<blink::LocalFrameToken,
           std::unique_ptr<WebEngineRenderFrameObserver>>
      frame_token_to_observer_map_ GUARDED_BY(observer_map_lock_);

  // Initiates cache purges and Blink/V8 garbage collection when free memory
  // is limited.
  std::unique_ptr<memory_pressure::MultiSourceMemoryPressureMonitor>
      memory_pressure_monitor_;
};

#endif  // FUCHSIA_WEB_WEBENGINE_RENDERER_WEB_ENGINE_CONTENT_RENDERER_CLIENT_H_