MessageBroadcaster.h (1742B)
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/. */ 6 7 #ifndef mozilla_dom_MessageBroadcaster_h 8 #define mozilla_dom_MessageBroadcaster_h 9 10 #include "mozilla/dom/MessageListenerManager.h" 11 #include "nsContentUtils.h" 12 13 namespace mozilla::dom { 14 15 /** 16 * Implementation for the WebIDL MessageBroadcaster interface. Base class for 17 * window and process broadcaster message managers. 18 */ 19 class MessageBroadcaster : public MessageListenerManager { 20 public: 21 static MessageBroadcaster* From(MessageListenerManager* aManager) { 22 if (aManager->IsBroadcaster()) { 23 return static_cast<MessageBroadcaster*>(aManager); 24 } 25 return nullptr; 26 } 27 28 void BroadcastAsyncMessage(JSContext* aCx, const nsAString& aMessageName, 29 JS::Handle<JS::Value> aObj, 30 mozilla::ErrorResult& aError) { 31 DispatchAsyncMessage(aCx, aMessageName, aObj, JS::UndefinedHandleValue, 32 aError); 33 } 34 uint32_t ChildCount() { return mChildManagers.Length(); } 35 MessageListenerManager* GetChildAt(uint32_t aIndex) { 36 return mChildManagers.SafeElementAt(aIndex); 37 } 38 void ReleaseCachedProcesses(); 39 40 void AddChildManager(MessageListenerManager* aManager); 41 void RemoveChildManager(MessageListenerManager* aManager); 42 43 protected: 44 MessageBroadcaster(MessageBroadcaster* aParentManager, 45 MessageManagerFlags aFlags); 46 }; 47 48 } // namespace mozilla::dom 49 50 #endif // mozilla_dom_MessageBroadcaster_h