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/* -*- 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/. */
#ifndef mozilla_dom_JSActorManager_h
#define mozilla_dom_JSActorManager_h
#include "js/TypeDecls.h"
#include "mozilla/dom/JSActor.h"
#include "nsRefPtrHashtable.h"
#include "nsString.h"
namespace mozilla {
class ErrorResult;
namespace ipc {
class IProtocol;
}
namespace dom {
class JSActorProtocol;
class JSActorService;
class JSActorManager : public nsISupports {
public:
/**
* Get or create an actor by its name.
*
* Will set an error on |aRv| if the actor fails to be constructed.
*/
already_AddRefed<JSActor> GetActor(JSContext* aCx, const nsACString& aName,
ErrorResult& aRv);
/**
* Look up an existing actor by its name, returning nullptr if it doesn't
* already exist. Will not attempt to create the actor.
*/
already_AddRefed<JSActor> GetExistingActor(const nsACString& aName);
/**
* Handle receiving a raw message from the other side.
*/
void ReceiveRawMessage(const JSActorMessageMeta& aMetadata,
Maybe<ipc::StructuredCloneData>&& aData,
Maybe<ipc::StructuredCloneData>&& aStack);
protected:
/**
* The actor is about to be destroyed so prevent it from sending any
* more messages.
*/
void JSActorWillDestroy();
/**
* Lifecycle method which will fire the `didDestroy` methods on relevant
* actors.
*/
void JSActorDidDestroy();
/**
* Return the protocol with the given name, if it is supported by the current
* actor.
*/
virtual already_AddRefed<JSActorProtocol> MatchingJSActorProtocol(
JSActorService* aActorSvc, const nsACString& aName, ErrorResult& aRv) = 0;
/**
* Initialize a JSActor instance given the constructed JS object.
* `aMaybeActor` may be `nullptr`, which should construct the default empty
* actor.
*/
virtual already_AddRefed<JSActor> InitJSActor(
JS::Handle<JSObject*> aMaybeActor, const nsACString& aName,
ErrorResult& aRv) = 0;
/**
* Return this native actor. This should be the same object which is
* implementing `JSActorManager`.
*/
virtual mozilla::ipc::IProtocol* AsNativeActor() = 0;
private:
friend class JSActorService;
/**
* Note that a particular actor name has been unregistered, and fire the
* `didDestroy` method on the actor, if it's been initialized.
*/
void JSActorUnregister(const nsACString& aName);
nsRefPtrHashtable<nsCStringHashKey, JSActor> mJSActors;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_JSActorManager_h
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