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Issue #2197 - Part 3: Implement self.structuredClone()

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Based on https://bugzilla.mozilla.org/show_bug.cgi?id=1722576
This commit is contained in:
FranklinDM 2023-04-07 15:50:18 +08:00 • committed by roytam1
commit ef6b8db1d5
5 changed files with 95 additions and 0 deletions
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40
dom/workers/WorkerScope.cpp
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@ -7,6 +7,7 @@
#include "jsapi.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/Console.h"
#include "mozilla/dom/DedicatedWorkerGlobalScopeBinding.h"
@ -492,6 +493,45 @@ WorkerGlobalScope::CreateImageBitmap(const ImageBitmapSource& aImage,
}
}
// https://html.spec.whatwg.org/#structured-cloning
void WorkerGlobalScope::StructuredClone(JSContext* aCx,
JS::Handle<JS::Value> aValue,
const StructuredSerializeOptions& aOptions,
JS::MutableHandle<JS::Value> aRetval,
ErrorResult& aError) {
JS::Rooted<JS::Value> transferArray(aCx, JS::UndefinedValue());
aError = nsContentUtils::CreateJSValueFromSequenceOfObject(
aCx, aOptions.mTransfer, &transferArray);
if (NS_WARN_IF(aError.Failed())) {
return;
}
// FIXME: Uncomment once bug 1609990 and bug 1611855 lands.
//JS::CloneDataPolicy clonePolicy;
//clonePolicy.allowIntraClusterClonableSharedObjects();
//clonePolicy.allowSharedMemoryObjects();
StructuredCloneHolder holder(StructuredCloneHolder::CloningSupported,
StructuredCloneHolder::TransferringSupported,
JS::StructuredCloneScope::SameProcessDifferentThread);
holder.Write(aCx, aValue, transferArray, clonePolicy, aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
// TODO: Stop casting to nsISupports once bug 1585284 lands.
nsISupports* workerAsSupports = static_cast<nsIGlobalObject*>(this);
// TODO: Pass clonePolicy.
//holder.Read(this, aCx, aRetval, clonePolicy, aError);
holder.Read(workerAsSupports, aCx, aRetval, aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
nsTArray<RefPtr<MessagePort>> ports = holder.TakeTransferredPorts();
Unused << ports;
}
DedicatedWorkerGlobalScope::DedicatedWorkerGlobalScope(WorkerPrivate* aWorkerPrivate)
: WorkerGlobalScope(aWorkerPrivate)
{