gecko/dom/workers/MessagePort.h

113 lines
2.3 KiB
C++

/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* 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/. */
#ifndef mozilla_dom_workers_messageport_h_
#define mozilla_dom_workers_messageport_h_
#include "Workers.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "nsDOMEventTargetHelper.h"
class nsIDOMEvent;
class nsPIDOMWindow;
BEGIN_WORKERS_NAMESPACE
class SharedWorker;
class MessagePort MOZ_FINAL : public nsDOMEventTargetHelper
{
friend class SharedWorker;
typedef mozilla::ErrorResult ErrorResult;
nsRefPtr<SharedWorker> mSharedWorker;
nsTArray<nsCOMPtr<nsIDOMEvent>> mQueuedEvents;
uint64_t mSerial;
bool mStarted;
public:
static bool
PrefEnabled();
void
PostMessageMoz(JSContext* aCx, JS::HandleValue aMessage,
const Optional<Sequence<JS::Value>>& aTransferable,
ErrorResult& aRv);
void
Start();
void
Close()
{
AssertIsOnMainThread();
if (!IsClosed()) {
CloseInternal();
}
}
uint64_t
Serial() const
{
return mSerial;
}
void
QueueEvent(nsIDOMEvent* aEvent);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MessagePort, nsDOMEventTargetHelper)
EventHandlerNonNull*
GetOnmessage()
{
AssertIsOnMainThread();
return GetEventHandler(nsGkAtoms::onmessage, EmptyString());
}
void
SetOnmessage(EventHandlerNonNull* aCallback)
{
AssertIsOnMainThread();
SetEventHandler(nsGkAtoms::onmessage, EmptyString(), aCallback);
Start();
}
bool
IsClosed() const
{
AssertIsOnMainThread();
return !mSharedWorker;
}
virtual JSObject*
WrapObject(JSContext* aCx, JS::HandleObject aScope) MOZ_OVERRIDE;
virtual nsresult
PreHandleEvent(nsEventChainPreVisitor& aVisitor) MOZ_OVERRIDE;
private:
// This class can only be created by SharedWorker.
MessagePort(nsPIDOMWindow* aWindow, SharedWorker* aSharedWorker,
uint64_t aSerial);
// This class is reference-counted and will be destroyed from Release().
~MessagePort();
void
CloseInternal();
};
END_WORKERS_NAMESPACE
#endif // mozilla_dom_workers_messageport_h_