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The Tor Browser
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StructuredCloneBlob.h (3032B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef mozilla_dom_StructuredCloneBlob_h
      8 #define mozilla_dom_StructuredCloneBlob_h
      9 
     10 #include "js/TypeDecls.h"
     11 #include "mozilla/AlreadyAddRefed.h"
     12 #include "mozilla/Maybe.h"
     13 #include "mozilla/RefPtr.h"
     14 #include "mozilla/dom/StructuredCloneHolder.h"
     15 #include "nsIMemoryReporter.h"
     16 #include "nsISupports.h"
     17 
     18 struct JSStructuredCloneReader;
     19 struct JSStructuredCloneWriter;
     20 
     21 namespace mozilla {
     22 
     23 class ErrorResult;
     24 
     25 namespace dom {
     26 
     27 class GlobalObject;
     28 
     29 class StructuredCloneBlob final : public nsIMemoryReporter {
     30  MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)
     31 
     32 public:
     33  NS_DECL_ISUPPORTS
     34  NS_DECL_NSIMEMORYREPORTER
     35 
     36  static JSObject* ReadStructuredClone(JSContext* aCx,
     37                                       JSStructuredCloneReader* aReader,
     38                                       StructuredCloneHolder* aHolder);
     39  bool WriteStructuredClone(JSContext* aCx, JSStructuredCloneWriter* aWriter,
     40                            StructuredCloneHolder* aHolder);
     41 
     42  static already_AddRefed<StructuredCloneBlob> Constructor(
     43      GlobalObject& aGlobal, const nsACString& aName,
     44      const nsACString& aAnonymizedName, JS::Handle<JS::Value> aValue,
     45      JS::Handle<JSObject*> aTargetGlobal, ErrorResult& aRv);
     46 
     47  void Deserialize(JSContext* aCx, JS::Handle<JSObject*> aTargetScope,
     48                   bool aKeepData, JS::MutableHandle<JS::Value> aResult,
     49                   ErrorResult& aRv);
     50 
     51  uint64_t DataSize() {
     52    return mHolder.isSome() && mHolder->HasData() ? mHolder->BufferData().Size()
     53                                                  : 0;
     54  }
     55 
     56  nsISupports* GetParentObject() const { return nullptr; }
     57  JSObject* GetWrapper() const { return nullptr; }
     58 
     59  bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
     60                  JS::MutableHandle<JSObject*> aResult);
     61 
     62 protected:
     63  virtual ~StructuredCloneBlob();
     64 
     65 private:
     66  explicit StructuredCloneBlob();
     67 
     68  class Holder : public StructuredCloneHolder {
     69   public:
     70    using StructuredCloneHolder::StructuredCloneHolder;
     71 
     72    bool ReadStructuredCloneInternal(JSContext* aCx,
     73                                     JSStructuredCloneReader* aReader,
     74                                     StructuredCloneHolder* aHolder);
     75 
     76    bool WriteStructuredClone(JSContext* aCx, JSStructuredCloneWriter* aWriter,
     77                              StructuredCloneHolder* aHolder);
     78  };
     79 
     80  nsCString mName;
     81  nsCString mAnonymizedName;
     82  Maybe<Holder> mHolder;
     83 
     84  static already_AddRefed<StructuredCloneBlob> Create() {
     85    RefPtr<StructuredCloneBlob> holder = new StructuredCloneBlob();
     86    RegisterWeakMemoryReporter(holder);
     87    return holder.forget();
     88  }
     89 };
     90 
     91 }  // namespace dom
     92 }  // namespace mozilla
     93 
     94 #endif  // mozilla_dom_StructuredCloneBlob_h