gecko-dev/dom/base/StructuredCloneTester.cpp

122 строки
3.4 KiB
C++
Исходник Обычный вид История

/* -*- 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/. */
#include "StructuredCloneTester.h"
#include "js/StructuredClone.h"
#include "mozilla/RefPtr.h"
#include "mozilla/dom/StructuredCloneTags.h"
#include "mozilla/dom/StructuredCloneTesterBinding.h"
#include "xpcpublic.h"
namespace mozilla {
class ErrorResult;
namespace dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(StructuredCloneTester)
NS_IMPL_CYCLE_COLLECTING_ADDREF(StructuredCloneTester)
NS_IMPL_CYCLE_COLLECTING_RELEASE(StructuredCloneTester)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(StructuredCloneTester)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
StructuredCloneTester::StructuredCloneTester(nsISupports* aParent,
const bool aSerializable,
const bool aDeserializable)
: mParent(aParent),
mSerializable(aSerializable),
mDeserializable(aDeserializable)
{
}
/* static */ already_AddRefed<StructuredCloneTester>
StructuredCloneTester::Constructor(const GlobalObject& aGlobal,
const bool aSerializable,
const bool aDeserializable,
ErrorResult& aRv)
{
RefPtr<StructuredCloneTester> sct = new StructuredCloneTester(aGlobal.GetAsSupports(),
aSerializable,
aDeserializable);
return sct.forget();
}
bool
StructuredCloneTester::Serializable() const
{
return mSerializable;
}
bool
StructuredCloneTester::Deserializable() const
{
return mDeserializable;
}
/* static */ JSObject*
StructuredCloneTester::ReadStructuredClone(JSContext* aCx,
JSStructuredCloneReader* aReader)
{
uint32_t serializable = 0;
uint32_t deserializable = 0;
if (!JS_ReadUint32Pair(aReader, &serializable, &deserializable)) {
return nullptr;
}
nsIGlobalObject* global = xpc::CurrentNativeGlobal(aCx);
if (NS_WARN_IF(!global)) {
return nullptr;
}
// Prevent the return value from being trashed by a GC during ~nsRefPtr
JS::RootedObject result(aCx);
RefPtr<StructuredCloneTester> sct = new StructuredCloneTester(
global,
static_cast<bool>(serializable),
static_cast<bool>(deserializable)
);
// "Fail" deserialization
if (!sct->Deserializable()) {
xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
return nullptr;
}
result = sct->WrapObject(aCx, nullptr);
return result;
}
bool
StructuredCloneTester::WriteStructuredClone(JSStructuredCloneWriter* aWriter) const
{
return JS_WriteUint32Pair(aWriter, SCTAG_DOM_STRUCTURED_CLONE_TESTER, 0) &&
JS_WriteUint32Pair(aWriter, static_cast<uint32_t>(Serializable()),
static_cast<uint32_t>(Deserializable()));
}
nsISupports*
StructuredCloneTester::GetParentObject() const
{
return mParent;
}
JSObject*
StructuredCloneTester::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto)
{
return StructuredCloneTester_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla