dom/base/StructuredCloneTester.cpp

   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 #include "StructuredCloneTester.h"
   8
   9 #include "js/StructuredClone.h"
  10 #include "mozilla/RefPtr.h"
  11 #include "mozilla/dom/StructuredCloneTags.h"
  12 #include "mozilla/dom/StructuredCloneTesterBinding.h"
  13 #include "nsIGlobalObject.h"
  14 #include "xpcpublic.h"
  15
  16 namespace mozilla {
  17
  18 class ErrorResult;
  19
  20 namespace dom {
  21
  22 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(StructuredCloneTester)
  23 NS_IMPL_CYCLE_COLLECTING_ADDREF(StructuredCloneTester)
  24 NS_IMPL_CYCLE_COLLECTING_RELEASE(StructuredCloneTester)
  25 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(StructuredCloneTester)
  26   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  27   NS_INTERFACE_MAP_ENTRY(nsISupports)
  28 NS_INTERFACE_MAP_END
  29
  30 StructuredCloneTester::StructuredCloneTester(nsISupports* aParent,
  31                                              const bool aSerializable,
  32                                              const bool aDeserializable)
  33     : mParent(aParent),
  34       mSerializable(aSerializable),
  35       mDeserializable(aDeserializable) {}
  36
  37 /* static */
  38 already_AddRefed<StructuredCloneTester> StructuredCloneTester::Constructor(
  39     const GlobalObject& aGlobal, const bool aSerializable,
  40     const bool aDeserializable) {
  41   RefPtr<StructuredCloneTester> sct = new StructuredCloneTester(
  42       aGlobal.GetAsSupports(), aSerializable, aDeserializable);
  43   return sct.forget();
  44 }
  45
  46 bool StructuredCloneTester::Serializable() const { return mSerializable; }
  47
  48 bool StructuredCloneTester::Deserializable() const { return mDeserializable; }
  49
  50 /* static */
  51 already_AddRefed<StructuredCloneTester>
  52 StructuredCloneTester::ReadStructuredClone(JSContext* aCx,
  53                                            nsIGlobalObject* aGlobal,
  54                                            JSStructuredCloneReader* aReader) {
  55   uint32_t serializable = 0;
  56   uint32_t deserializable = 0;
  57
  58   if (!JS_ReadUint32Pair(aReader, &serializable, &deserializable)) {
  59     return nullptr;
  60   }
  61
  62   RefPtr<StructuredCloneTester> sct =
  63       new StructuredCloneTester(aGlobal, static_cast<bool>(serializable),
  64                                 static_cast<bool>(deserializable));
  65
  66   // "Fail" deserialization
  67   if (!sct->Deserializable()) {
  68     xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
  69     return nullptr;
  70   }
  71
  72   return sct.forget();
  73 }
  74
  75 bool StructuredCloneTester::WriteStructuredClone(
  76     JSContext* aCx, JSStructuredCloneWriter* aWriter) const {
  77   if (!Serializable()) {
  78     return xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
  79   }
  80   return JS_WriteUint32Pair(aWriter, static_cast<uint32_t>(Serializable()),
  81                             static_cast<uint32_t>(Deserializable()));
  82 }
  83
  84 nsISupports* StructuredCloneTester::GetParentObject() const { return mParent; }
  85
  86 JSObject* StructuredCloneTester::WrapObject(JSContext* aCx,
  87                                             JS::Handle<JSObject*> aGivenProto) {
  88   return StructuredCloneTester_Binding::Wrap(aCx, this, aGivenProto);
  89 }
  90
  91 }  // namespace dom
  92 }  // namespace mozilla