зеркало из https://github.com/mozilla/gecko-dev.git
115 строки
2.9 KiB
C++
115 строки
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_MessagePort_h
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#define mozilla_dom_MessagePort_h
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#include "mozilla/Attributes.h"
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#include "mozilla/DOMEventTargetHelper.h"
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class nsPIDOMWindow;
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namespace mozilla {
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namespace dom {
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class DispatchEventRunnable;
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class PostMessageRunnable;
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class MessagePortBase : public DOMEventTargetHelper
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{
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protected:
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explicit MessagePortBase(nsPIDOMWindow* aWindow);
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MessagePortBase();
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public:
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virtual void
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PostMessageMoz(JSContext* aCx, JS::Handle<JS::Value> aMessage,
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const Optional<Sequence<JS::Value>>& aTransferable,
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ErrorResult& aRv) = 0;
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virtual void
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Start() = 0;
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virtual void
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Close() = 0;
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// The 'message' event handler has to call |Start()| method, so we
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// cannot use IMPL_EVENT_HANDLER macro here.
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virtual EventHandlerNonNull*
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GetOnmessage() = 0;
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virtual void
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SetOnmessage(EventHandlerNonNull* aCallback) = 0;
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// Duplicate this message port. This method is used by the Structured Clone
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// Algorithm and makes the new MessagePort active with the entangled
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// MessagePort of this object.
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virtual already_AddRefed<MessagePortBase>
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Clone() = 0;
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};
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class MessagePort final : public MessagePortBase
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{
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friend class DispatchEventRunnable;
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friend class PostMessageRunnable;
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MessagePort,
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DOMEventTargetHelper)
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explicit MessagePort(nsPIDOMWindow* aWindow);
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virtual JSObject*
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WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
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virtual void
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PostMessageMoz(JSContext* aCx, JS::Handle<JS::Value> aMessage,
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const Optional<Sequence<JS::Value>>& aTransferable,
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ErrorResult& aRv) override;
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virtual void
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Start() override;
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virtual void
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Close() override;
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virtual EventHandlerNonNull*
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GetOnmessage() override;
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virtual void
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SetOnmessage(EventHandlerNonNull* aCallback) override;
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// Non WebIDL methods
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// This method entangles this MessagePort with another one.
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// If it is already entangled, it's disentangled first and enatangle to the
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// new one.
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void
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Entangle(MessagePort* aMessagePort);
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virtual already_AddRefed<MessagePortBase>
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Clone() override;
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private:
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~MessagePort();
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// Dispatch events from the Message Queue using a nsRunnable.
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void Dispatch();
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nsRefPtr<DispatchEventRunnable> mDispatchRunnable;
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nsRefPtr<MessagePort> mEntangledPort;
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nsTArray<nsRefPtr<PostMessageRunnable> > mMessageQueue;
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bool mMessageQueueEnabled;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_MessagePort_h
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