1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 #include "MessageChannel.h"
9 #include "mozilla/dom/MessageChannelBinding.h"
10 #include "mozilla/dom/MessagePort.h"
11 #include "mozilla/dom/Navigator.h"
12 #include "mozilla/dom/WorkerRunnable.h"
13 #include "mozilla/dom/Document.h"
14 #include "nsIGlobalObject.h"
15 #include "nsServiceManagerUtils.h"
17 namespace mozilla::dom
{
19 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(MessageChannel
, mGlobal
, mPort1
, mPort2
)
20 NS_IMPL_CYCLE_COLLECTING_ADDREF(MessageChannel
)
21 NS_IMPL_CYCLE_COLLECTING_RELEASE(MessageChannel
)
23 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MessageChannel
)
24 NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
25 NS_INTERFACE_MAP_ENTRY(nsISupports
)
28 MessageChannel::MessageChannel(nsIGlobalObject
* aGlobal
) : mGlobal(aGlobal
) {
32 MessageChannel::~MessageChannel() = default;
34 JSObject
* MessageChannel::WrapObject(JSContext
* aCx
,
35 JS::Handle
<JSObject
*> aGivenProto
) {
36 return MessageChannel_Binding::Wrap(aCx
, this, aGivenProto
);
40 already_AddRefed
<MessageChannel
> MessageChannel::Constructor(
41 const GlobalObject
& aGlobal
, ErrorResult
& aRv
) {
42 nsCOMPtr
<nsIGlobalObject
> global
= do_QueryInterface(aGlobal
.GetAsSupports());
43 return Constructor(global
, aRv
);
47 already_AddRefed
<MessageChannel
> MessageChannel::Constructor(
48 nsIGlobalObject
* aGlobal
, ErrorResult
& aRv
) {
52 aRv
= nsID::GenerateUUIDInPlace(portUUID1
);
58 aRv
= nsID::GenerateUUIDInPlace(portUUID2
);
63 RefPtr
<MessageChannel
> channel
= new MessageChannel(aGlobal
);
65 channel
->mPort1
= MessagePort::Create(aGlobal
, portUUID1
, portUUID2
, aRv
);
66 if (NS_WARN_IF(aRv
.Failed())) {
70 channel
->mPort2
= MessagePort::Create(aGlobal
, portUUID2
, portUUID1
, aRv
);
71 if (NS_WARN_IF(aRv
.Failed())) {
75 channel
->mPort1
->UnshippedEntangle(channel
->mPort2
);
76 channel
->mPort2
->UnshippedEntangle(channel
->mPort1
);
78 // MessagePorts should not work if created from a disconnected window.
79 nsCOMPtr
<nsPIDOMWindowInner
> window
= do_QueryInterface(aGlobal
);
80 if (window
&& !window
->GetDocShell()) {
81 // The 2 ports are entangled. We can close one of them to close the other
83 channel
->mPort1
->CloseForced();
86 return channel
.forget();
89 } // namespace mozilla::dom