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-rw-r--r--dom/workers/MessageEventRunnable.cpp127
1 files changed, 127 insertions, 0 deletions
diff --git a/dom/workers/MessageEventRunnable.cpp b/dom/workers/MessageEventRunnable.cpp
new file mode 100644
index 0000000000..8edc7037cd
--- /dev/null
+++ b/dom/workers/MessageEventRunnable.cpp
@@ -0,0 +1,127 @@
+/* -*- 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 "nsQueryObject.h"
+#include "WorkerScope.h"
+
+namespace mozilla::dom {
+
+MessageEventRunnable::MessageEventRunnable(WorkerPrivate* aWorkerPrivate,
+ Target aTarget)
+ : WorkerDebuggeeRunnable(aWorkerPrivate, "MessageEventRunnable", aTarget),
+ 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;
+
+ 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 (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 (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 DispatchDOMEvent(aCx, aWorkerPrivate,
+ aWorkerPrivate->ParentEventTargetRef(),
+ !aWorkerPrivate->GetParent());
+ }
+
+ MOZ_ASSERT(aWorkerPrivate == GetWorkerPrivateFromContext(aCx));
+ MOZ_ASSERT(aWorkerPrivate->GlobalScope());
+
+ // If the worker start shutting down, don't dispatch the message event.
+ if (NS_FAILED(
+ aWorkerPrivate->GlobalScope()->CheckCurrentGlobalCorrectness())) {
+ return true;
+ }
+
+ 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