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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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 https://mozilla.org/MPL/2.0/. */
#include "EventWithOptionsRunnable.h"
#include "WorkerScope.h"
#include "mozilla/dom/WorkerRunnable.h"
#include "mozilla/dom/StructuredCloneHolder.h"
#include "js/StructuredClone.h"
#include "js/RootingAPI.h"
#include "js/Value.h"
#include "nsJSPrincipals.h"
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "MainThreadUtils.h"
#include "mozilla/Assertions.h"
#include "nsGlobalWindowInner.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "mozilla/ErrorResult.h"
#include "nsIGlobalObject.h"
#include "nsCOMPtr.h"
#include "js/GlobalObject.h"
#include "xpcpublic.h"
#include "mozilla/dom/MessagePortBinding.h"
#include "mozilla/dom/MessagePort.h"
#include "mozilla/OwningNonNull.h"
#include "mozilla/RefPtr.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/WorkerCommon.h"
namespace mozilla::dom {
EventWithOptionsRunnable::EventWithOptionsRunnable(Worker& aWorker,
const char* aName)
: WorkerDebuggeeRunnable(aWorker.mWorkerPrivate, aName,
WorkerRunnable::WorkerThread),
StructuredCloneHolder(CloningSupported, TransferringSupported,
StructuredCloneScope::SameProcess) {}
EventWithOptionsRunnable::~EventWithOptionsRunnable() = default;
void EventWithOptionsRunnable::InitOptions(
JSContext* aCx, JS::Handle<JS::Value> aOptions,
const Sequence<JSObject*>& aTransferable, ErrorResult& aRv) {
JS::Rooted<JS::Value> transferable(aCx, JS::UndefinedValue());
aRv = nsContentUtils::CreateJSValueFromSequenceOfObject(aCx, aTransferable,
&transferable);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
JS::CloneDataPolicy clonePolicy;
// DedicatedWorkers are always part of the same agent cluster.
clonePolicy.allowIntraClusterClonableSharedObjects();
MOZ_ASSERT(NS_IsMainThread());
nsGlobalWindowInner* win = nsContentUtils::IncumbentInnerWindow();
if (win && win->IsSharedMemoryAllowed()) {
clonePolicy.allowSharedMemoryObjects();
}
Write(aCx, aOptions, transferable, clonePolicy, aRv);
}
// Cargo-culted from MesssageEventRunnable.
bool EventWithOptionsRunnable::BuildAndFireEvent(
JSContext* aCx, WorkerPrivate* aWorkerPrivate,
DOMEventTargetHelper* aTarget) {
IgnoredErrorResult rv;
nsCOMPtr<nsIGlobalObject> parent = aTarget->GetParentObject();
// For some workers without window, parent is null and we try to find it
// from the JS Context.
if (!parent) {
JS::Rooted<JSObject*> globalObject(aCx, JS::CurrentGlobalOrNull(aCx));
if (NS_WARN_IF(!globalObject)) {
rv.ThrowDataCloneError("failed to get global object");
OptionsDeserializeFailed(rv);
return false;
}
parent = xpc::NativeGlobal(globalObject);
if (NS_WARN_IF(!parent)) {
rv.ThrowDataCloneError("failed to get parent");
OptionsDeserializeFailed(rv);
return false;
}
}
MOZ_ASSERT(parent);
JS::Rooted<JS::Value> options(aCx);
JS::CloneDataPolicy cloneDataPolicy;
if (parent->GetClientInfo().isSome() &&
parent->GetClientInfo()->AgentClusterId().isSome() &&
parent->GetClientInfo()->AgentClusterId()->Equals(
aWorkerPrivate->AgentClusterId())) {
cloneDataPolicy.allowIntraClusterClonableSharedObjects();
}
if (aWorkerPrivate->IsSharedMemoryAllowed()) {
cloneDataPolicy.allowSharedMemoryObjects();
}
Read(parent, aCx, &options, cloneDataPolicy, rv);
if (NS_WARN_IF(rv.Failed())) {
OptionsDeserializeFailed(rv);
return false;
}
Sequence<OwningNonNull<MessagePort>> ports;
if (NS_WARN_IF(!TakeTransferredPortsAsSequence(ports))) {
// TODO: Is this an appropriate type? What does this actually do?
rv.ThrowDataCloneError("TakeTransferredPortsAsSequence failed");
OptionsDeserializeFailed(rv);
return false;
}
RefPtr<dom::Event> event = BuildEvent(aCx, parent, aTarget, options);
if (NS_WARN_IF(!event)) {
return false;
}
aTarget->DispatchEvent(*event);
return true;
}
bool EventWithOptionsRunnable::WorkerRun(JSContext* aCx,
WorkerPrivate* aWorkerPrivate) {
if (mTarget == ParentThread) {
// Don't fire this event if the JS object has been disconnected from the
// private object.
if (!aWorkerPrivate->IsAcceptingEvents()) {
return true;
}
aWorkerPrivate->AssertInnerWindowIsCorrect();
return BuildAndFireEvent(aCx, aWorkerPrivate,
aWorkerPrivate->ParentEventTargetRef());
}
MOZ_ASSERT(aWorkerPrivate == GetWorkerPrivateFromContext(aCx));
MOZ_ASSERT(aWorkerPrivate->GlobalScope());
// If the worker start shutting down, don't dispatch the event.
if (NS_FAILED(
aWorkerPrivate->GlobalScope()->CheckCurrentGlobalCorrectness())) {
return true;
}
return BuildAndFireEvent(aCx, aWorkerPrivate, aWorkerPrivate->GlobalScope());
}
} // namespace mozilla::dom
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