SystemGlobal.h - mozsearch

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef SystemGlobal_h__

#define SystemGlobal_h__

#include "js/loader/ModuleLoaderBase.h"

#include "mozilla/BasePrincipal.h"

#include "mozilla/SchedulerGroup.h"

#include "mozilla/StorageAccess.h"

#include "nsISupports.h"

#include "nsWeakReference.h"

#include "nsIGlobalObject.h"

#include "nsIScriptObjectPrincipal.h"

#include "nsIXPCScriptable.h"

#include "js/HeapAPI.h"

class XPCWrappedNative;

// The shared system global (used by ChromeUtils.importESModule), and also

// the xpcshell's global.

class SystemGlobal final : public nsIGlobalObject,

                           public nsIScriptObjectPrincipal,

                           public nsIXPCScriptable,

                           public nsIClassInfo,

                           public nsSupportsWeakReference {

 public:

  SystemGlobal();

  NS_DECL_ISUPPORTS

  NS_DECL_NSIXPCSCRIPTABLE

  NS_DECL_NSICLASSINFO

  using ModuleLoaderBase = JS::loader::ModuleLoaderBase;

  nsIPrincipal* GetPrincipal() override { return mPrincipal; }

  nsIPrincipal* GetEffectiveCookiePrincipal() override { return mPrincipal; }

  nsIPrincipal* GetEffectiveStoragePrincipal() override { return mPrincipal; }

  nsIPrincipal* PartitionedPrincipal() override { return mPrincipal; }

  mozilla::Maybe<nsID> GetAgentClusterId() const override {

    return mozilla::Some(mAgentClusterId);

  mozilla::OriginTrials Trials() const override { return {}; }

  JSObject* GetGlobalJSObject() override;

  JSObject* GetGlobalJSObjectPreserveColor() const override;

  ModuleLoaderBase* GetModuleLoader(JSContext* aCx) override {

    return mModuleLoader;

  mozilla::StorageAccess GetStorageAccess() final {

    MOZ_ASSERT(NS_IsMainThread());

    return mozilla::StorageAccess::eAllow;

  mozilla::Result<mozilla::ipc::PrincipalInfo, nsresult> GetStorageKey()

      override;

  void ForgetGlobalObject() { mWrapper = nullptr; }

  void SetGlobalObject(JSObject* global);

  void InitModuleLoader(ModuleLoaderBase* aModuleLoader) {

    MOZ_ASSERT(!mModuleLoader);

    mModuleLoader = aModuleLoader;

  nsISerialEventTarget* SerialEventTarget() const final {

    return mozilla::GetMainThreadSerialEventTarget();

  nsresult Dispatch(already_AddRefed<nsIRunnable>&& aRunnable) const final {

    return mozilla::SchedulerGroup::Dispatch(std::move(aRunnable));

  bool IsSharedMemoryAllowed() const override { return true; }

  bool ShouldResistFingerprinting(RFPTarget aTarget) const override {

    // SystemGlobal is always the System Principal

    MOZ_RELEASE_ASSERT(mPrincipal->IsSystemPrincipal());

    return false;

 private:

  virtual ~SystemGlobal() = default;

  const nsID mAgentClusterId;

  nsCOMPtr<nsIPrincipal> mPrincipal;

  XPCWrappedNative* mWrapper;

  RefPtr<JS::loader::ModuleLoaderBase> mModuleLoader;

};

#endif  // SystemGlobal_h__