gecko-dev/dom/base/MessageBroadcaster.h

59 строки
1.8 KiB
C++

/* -*- 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_MessageBroadcaster_h
#define mozilla_dom_MessageBroadcaster_h
#include "mozilla/dom/MessageListenerManager.h"
namespace mozilla {
namespace dom {
/**
* Implementation for the WebIDL MessageBroadcaster interface. Base class for window and
* process broadcaster message managers.
*/
class MessageBroadcaster : public MessageListenerManager
{
public:
static MessageBroadcaster* From(MessageListenerManager* aManager)
{
if (aManager->IsBroadcaster()) {
return static_cast<MessageBroadcaster*>(aManager);
}
return nullptr;
}
void BroadcastAsyncMessage(JSContext* aCx, const nsAString& aMessageName,
JS::Handle<JS::Value> aObj,
JS::Handle<JSObject*> aObjects,
mozilla::ErrorResult& aError)
{
DispatchAsyncMessage(aCx, aMessageName, aObj, aObjects, nullptr,
JS::UndefinedHandleValue, aError);
}
uint32_t ChildCount()
{
return mChildManagers.Length();
}
MessageListenerManager* GetChildAt(uint32_t aIndex)
{
return mChildManagers.SafeElementAt(aIndex);
}
void ReleaseCachedProcesses();
void AddChildManager(MessageListenerManager* aManager);
void RemoveChildManager(MessageListenerManager* aManager);
protected:
MessageBroadcaster(MessageBroadcaster* aParentManager, MessageManagerFlags aFlags);
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_MessageBroadcaster_h