third_party/blink/renderer/modules/exported/web_embedded_worker_impl.h

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_EXPORTED_WEB_EMBEDDED_WORKER_IMPL_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_EXPORTED_WEB_EMBEDDED_WORKER_IMPL_H_

#include <memory>

#include "base/macros.h"
#include "services/service_manager/public/cpp/interface_provider.h"
#include "services/service_manager/public/mojom/interface_provider.mojom-blink.h"
#include "third_party/blink/public/mojom/cache_storage/cache_storage.mojom-blink.h"
#include "third_party/blink/public/web/web_embedded_worker.h"
#include "third_party/blink/public/web/web_embedded_worker_start_data.h"
#include "third_party/blink/renderer/core/exported/worker_shadow_page.h"
#include "third_party/blink/renderer/core/workers/global_scope_creation_params.h"
#include "third_party/blink/renderer/core/workers/worker_clients.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/modules/service_worker/service_worker_content_settings_proxy.h"
#include "third_party/blink/renderer/platform/heap/handle.h"

namespace blink {

class FetchClientSettingsObjectSnapshot;
class ServiceWorkerInstalledScriptsManager;
class ServiceWorkerThread;
class WorkerClassicScriptLoader;

class MODULES_EXPORT WebEmbeddedWorkerImpl final
    : public WebEmbeddedWorker,
      public WorkerShadowPage::Client {
 public:
  WebEmbeddedWorkerImpl(
      std::unique_ptr<WebServiceWorkerContextClient>,
      std::unique_ptr<WebServiceWorkerInstalledScriptsManagerParams>,
      std::unique_ptr<ServiceWorkerContentSettingsProxy>,
      mojom::blink::CacheStoragePtrInfo,
      service_manager::mojom::blink::InterfaceProviderPtrInfo);
  ~WebEmbeddedWorkerImpl() override;

  // WebEmbeddedWorker overrides.
  void StartWorkerContext(const WebEmbeddedWorkerStartData&) override;
  void TerminateWorkerContext() override;
  void ResumeAfterDownload() override;
  void AddMessageToConsole(const WebConsoleMessage&) override;
  void BindDevToolsAgent(
      mojo::ScopedInterfaceEndpointHandle devtools_agent_host_ptr_info,
      mojo::ScopedInterfaceEndpointHandle devtools_agent_request) override;

  // WorkerShadowPage::Client overrides.
  std::unique_ptr<WebApplicationCacheHost> CreateApplicationCacheHost(
      WebApplicationCacheHostClient*) override;
  void OnShadowPageInitialized() override;

  static std::unique_ptr<WebEmbeddedWorkerImpl> CreateForTesting(
      std::unique_ptr<WebServiceWorkerContextClient>,
      std::unique_ptr<ServiceWorkerInstalledScriptsManager>);

  void WaitForShutdownForTesting();

 private:
  // WebDevToolsAgentImpl::Client overrides.
  void ResumeStartup() override;
  const base::UnguessableToken& GetDevToolsWorkerToken() override;

  void OnScriptLoaderFinished();
  void StartWorkerThread();

  // Creates an outside settings object from the worker shadow page for
  // top-level worker script fetch.
  FetchClientSettingsObjectSnapshot* CreateFetchClientSettingsObject();

  WebEmbeddedWorkerStartData worker_start_data_;

  std::unique_ptr<WebServiceWorkerContextClient> worker_context_client_;

  // These are valid until StartWorkerThread() is called. After the worker
  // thread is created, these are passed to the worker thread.
  std::unique_ptr<ServiceWorkerInstalledScriptsManager>
      installed_scripts_manager_;
  std::unique_ptr<ServiceWorkerContentSettingsProxy> content_settings_client_;

  // Kept around only while main script loading is ongoing.
  Persistent<WorkerClassicScriptLoader> main_script_loader_;

  std::unique_ptr<ServiceWorkerThread> worker_thread_;

  std::unique_ptr<WorkerShadowPage> shadow_page_;

  bool asked_to_terminate_ = false;

  enum WaitingForDebuggerState { kWaitingForDebugger, kNotWaitingForDebugger };

  enum {
    kDontPauseAfterDownload,
    kDoPauseAfterDownload,
    kIsPausedAfterDownload
  } pause_after_download_state_;

  // Whether to pause the initialization and wait for debugger to attach
  // before proceeding. This technique allows debugging worker startup.
  WaitingForDebuggerState waiting_for_debugger_state_;
  // Unique worker token used by DevTools to attribute different instrumentation
  // to the same worker.
  base::UnguessableToken devtools_worker_token_;

  mojom::blink::CacheStoragePtrInfo cache_storage_info_;

  service_manager::mojom::blink::InterfaceProviderPtrInfo
      interface_provider_info_;

  DISALLOW_COPY_AND_ASSIGN(WebEmbeddedWorkerImpl);
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_EXPORTED_WEB_EMBEDDED_WORKER_IMPL_H_