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-rw-r--r--dom/messagechannel/MessageChannel.cpp89
1 files changed, 89 insertions, 0 deletions
diff --git a/dom/messagechannel/MessageChannel.cpp b/dom/messagechannel/MessageChannel.cpp
new file mode 100644
index 0000000000..bf95613082
--- /dev/null
+++ b/dom/messagechannel/MessageChannel.cpp
@@ -0,0 +1,89 @@
+/* -*- 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 "MessageChannel.h"
+
+#include "mozilla/dom/MessageChannelBinding.h"
+#include "mozilla/dom/MessagePort.h"
+#include "mozilla/dom/Navigator.h"
+#include "mozilla/dom/WorkerRunnable.h"
+#include "mozilla/dom/Document.h"
+#include "nsIGlobalObject.h"
+#include "nsServiceManagerUtils.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(MessageChannel, mGlobal, mPort1, mPort2)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(MessageChannel)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(MessageChannel)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MessageChannel)
+ NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+ NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+MessageChannel::MessageChannel(nsIGlobalObject* aGlobal) : mGlobal(aGlobal) {
+ MOZ_ASSERT(aGlobal);
+}
+
+MessageChannel::~MessageChannel() = default;
+
+JSObject* MessageChannel::WrapObject(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) {
+ return MessageChannel_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+/* static */
+already_AddRefed<MessageChannel> MessageChannel::Constructor(
+ const GlobalObject& aGlobal, ErrorResult& aRv) {
+ nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+ return Constructor(global, aRv);
+}
+
+/* static */
+already_AddRefed<MessageChannel> MessageChannel::Constructor(
+ nsIGlobalObject* aGlobal, ErrorResult& aRv) {
+ MOZ_ASSERT(aGlobal);
+
+ nsID portUUID1;
+ aRv = nsID::GenerateUUIDInPlace(portUUID1);
+ if (aRv.Failed()) {
+ return nullptr;
+ }
+
+ nsID portUUID2;
+ aRv = nsID::GenerateUUIDInPlace(portUUID2);
+ if (aRv.Failed()) {
+ return nullptr;
+ }
+
+ RefPtr<MessageChannel> channel = new MessageChannel(aGlobal);
+
+ channel->mPort1 = MessagePort::Create(aGlobal, portUUID1, portUUID2, aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ channel->mPort2 = MessagePort::Create(aGlobal, portUUID2, portUUID1, aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ channel->mPort1->UnshippedEntangle(channel->mPort2);
+ channel->mPort2->UnshippedEntangle(channel->mPort1);
+
+ // MessagePorts should not work if created from a disconnected window.
+ nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aGlobal);
+ if (window && !window->GetDocShell()) {
+ // The 2 ports are entangled. We can close one of them to close the other
+ // too.
+ channel->mPort1->CloseForced();
+ }
+
+ return channel.forget();
+}
+
+} // namespace mozilla::dom