StructuredCloneBlob.h

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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 mozilla_dom_StructuredCloneBlob_h

#define mozilla_dom_StructuredCloneBlob_h

#include "js/TypeDecls.h"

#include "mozilla/AlreadyAddRefed.h"

#include "mozilla/Maybe.h"

#include "mozilla/RefPtr.h"

#include "mozilla/dom/StructuredCloneHolder.h"

#include "nsIMemoryReporter.h"

#include "nsISupports.h"

struct JSStructuredCloneReader;

struct JSStructuredCloneWriter;

namespace mozilla {

class ErrorResult;

namespace dom {

class GlobalObject;

class StructuredCloneBlob final : public nsIMemoryReporter {

  MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)

 public:

  NS_DECL_ISUPPORTS

  NS_DECL_NSIMEMORYREPORTER

  static JSObject* ReadStructuredClone(JSContext* aCx,

                                       JSStructuredCloneReader* aReader,

                                       StructuredCloneHolder* aHolder);

  bool WriteStructuredClone(JSContext* aCx, JSStructuredCloneWriter* aWriter,

                            StructuredCloneHolder* aHolder);

  static already_AddRefed<StructuredCloneBlob> Constructor(

      GlobalObject& aGlobal, const nsACString& aName,

      const nsACString& aAnonymizedName, JS::Handle<JS::Value> aValue,

      JS::Handle<JSObject*> aTargetGlobal, ErrorResult& aRv);

  void Deserialize(JSContext* aCx, JS::Handle<JSObject*> aTargetScope,

                   bool aKeepData, JS::MutableHandle<JS::Value> aResult,

                   ErrorResult& aRv);

  uint64_t DataSize() {

    return mHolder.isSome() && mHolder->HasData() ? mHolder->BufferData().Size()

                                                  : 0;

  nsISupports* GetParentObject() const { return nullptr; }

  JSObject* GetWrapper() const { return nullptr; }

  bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,

                  JS::MutableHandle<JSObject*> aResult);

 protected:

  virtual ~StructuredCloneBlob();

 private:

  explicit StructuredCloneBlob();

  class Holder : public StructuredCloneHolder {

   public:

    using StructuredCloneHolder::StructuredCloneHolder;

    bool ReadStructuredCloneInternal(JSContext* aCx,

                                     JSStructuredCloneReader* aReader,

                                     StructuredCloneHolder* aHolder);

    bool WriteStructuredClone(JSContext* aCx, JSStructuredCloneWriter* aWriter,

                              StructuredCloneHolder* aHolder);

};

  nsCString mName;

  nsCString mAnonymizedName;

  Maybe<Holder> mHolder;

  static already_AddRefed<StructuredCloneBlob> Create() {

    RefPtr<StructuredCloneBlob> holder = new StructuredCloneBlob();

    RegisterWeakMemoryReporter(holder);

    return holder.forget();

};

}  // namespace dom

}  // namespace mozilla

#endif  // mozilla_dom_StructuredCloneBlob_h