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/* -*- 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 "MessageEventRunnable.h"
#include "mozilla/dom/MessageEvent.h"
#include "mozilla/dom/MessageEventBinding.h"
#include "mozilla/dom/RootedDictionary.h"
#include "mozilla/TimelineConsumers.h"
#include "mozilla/WorkerTimelineMarker.h"
#include "nsQueryObject.h"
#include "WorkerScope.h"
namespace mozilla::dom {
MessageEventRunnable::MessageEventRunnable(WorkerPrivate* aWorkerPrivate,
TargetAndBusyBehavior aBehavior)
: WorkerDebuggeeRunnable(aWorkerPrivate, aBehavior),
StructuredCloneHolder(CloningSupported, TransferringSupported,
StructuredCloneScope::SameProcess) {}
bool MessageEventRunnable::DispatchDOMEvent(JSContext* aCx,
WorkerPrivate* aWorkerPrivate,
DOMEventTargetHelper* aTarget,
bool aIsMainThread) {
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)) {
return false;
}
parent = xpc::NativeGlobal(globalObject);
if (NS_WARN_IF(!parent)) {
return false;
}
}
MOZ_ASSERT(parent);
JS::Rooted<JS::Value> messageData(aCx);
IgnoredErrorResult rv;
UniquePtr<AbstractTimelineMarker> start;
UniquePtr<AbstractTimelineMarker> end;
bool isTimelineRecording = !TimelineConsumers::IsEmpty();
if (isTimelineRecording) {
start = MakeUnique<WorkerTimelineMarker>(
aIsMainThread
? ProfileTimelineWorkerOperationType::DeserializeDataOnMainThread
: ProfileTimelineWorkerOperationType::DeserializeDataOffMainThread,
MarkerTracingType::START);
}
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, &messageData, cloneDataPolicy, rv);
if (isTimelineRecording) {
end = MakeUnique<WorkerTimelineMarker>(
aIsMainThread
? ProfileTimelineWorkerOperationType::DeserializeDataOnMainThread
: ProfileTimelineWorkerOperationType::DeserializeDataOffMainThread,
MarkerTracingType::END);
TimelineConsumers::AddMarkerForAllObservedDocShells(start);
TimelineConsumers::AddMarkerForAllObservedDocShells(end);
}
if (NS_WARN_IF(rv.Failed())) {
DispatchError(aCx, aTarget);
return false;
}
Sequence<OwningNonNull<MessagePort>> ports;
if (!TakeTransferredPortsAsSequence(ports)) {
DispatchError(aCx, aTarget);
return false;
}
RefPtr<MessageEvent> event = new MessageEvent(aTarget, nullptr, nullptr);
event->InitMessageEvent(nullptr, u"message"_ns, CanBubble::eNo,
Cancelable::eNo, messageData, u""_ns, u""_ns, nullptr,
ports);
event->SetTrusted(true);
aTarget->DispatchEvent(*event);
return true;
}
bool MessageEventRunnable::WorkerRun(JSContext* aCx,
WorkerPrivate* aWorkerPrivate) {
if (mBehavior == ParentThreadUnchangedBusyCount) {
// Don't fire this event if the JS object has been disconnected from the
// private object.
if (!aWorkerPrivate->IsAcceptingEvents()) {
return true;
}
// Once a window has frozen its workers, their
// mMainThreadDebuggeeEventTargets should be paused, and their
// WorkerDebuggeeRunnables should not be being executed. The same goes for
// WorkerDebuggeeRunnables sent from child to parent workers, but since a
// frozen parent worker runs only control runnables anyway, that is taken
// care of naturally.
MOZ_ASSERT(!aWorkerPrivate->IsFrozen());
// Similarly for paused windows; all its workers should have been informed.
// (Subworkers are unaffected by paused windows.)
MOZ_ASSERT(!aWorkerPrivate->IsParentWindowPaused());
aWorkerPrivate->AssertInnerWindowIsCorrect();
return DispatchDOMEvent(aCx, aWorkerPrivate,
aWorkerPrivate->ParentEventTargetRef(),
!aWorkerPrivate->GetParent());
}
MOZ_ASSERT(aWorkerPrivate == GetWorkerPrivateFromContext(aCx));
return DispatchDOMEvent(aCx, aWorkerPrivate, aWorkerPrivate->GlobalScope(),
false);
}
void MessageEventRunnable::DispatchError(JSContext* aCx,
DOMEventTargetHelper* aTarget) {
RootedDictionary<MessageEventInit> init(aCx);
init.mBubbles = false;
init.mCancelable = false;
RefPtr<Event> event =
MessageEvent::Constructor(aTarget, u"messageerror"_ns, init);
event->SetTrusted(true);
aTarget->DispatchEvent(*event);
}
} // namespace mozilla::dom
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