| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef EXTENSIONS_RENDERER_API_EVENT_HANDLER_H_ |
| #define EXTENSIONS_RENDERER_API_EVENT_HANDLER_H_ |
| |
| #include <string> |
| |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "extensions/renderer/api_binding_types.h" |
| #include "extensions/renderer/event_emitter.h" |
| #include "v8/include/v8.h" |
| |
| namespace base { |
| class ListValue; |
| } |
| |
| namespace extensions { |
| |
| // The object to handle API events. This includes vending v8::Objects for the |
| // event; handling adding, removing, and querying listeners; and firing events |
| // to subscribed listeners. Designed to be used across JS contexts, but on a |
| // single thread. |
| class APIEventHandler { |
| public: |
| using EventListenersChangedMethod = |
| base::Callback<void(const std::string& event_name, |
| binding::EventListenersChanged, |
| v8::Local<v8::Context>)>; |
| |
| APIEventHandler(const binding::RunJSFunction& call_js, |
| const EventListenersChangedMethod& listeners_changed); |
| ~APIEventHandler(); |
| |
| // Returns a new v8::Object for an event with the given |event_name|. |
| v8::Local<v8::Object> CreateEventInstance(const std::string& event_name, |
| v8::Local<v8::Context> context); |
| |
| // Notifies all listeners of the event with the given |event_name| in the |
| // specified |context|, sending the included |arguments|. |
| void FireEventInContext(const std::string& event_name, |
| v8::Local<v8::Context> context, |
| const base::ListValue& arguments); |
| |
| // Returns the EventListeners for a given |event_name| and |context|. |
| size_t GetNumEventListenersForTesting(const std::string& event_name, |
| v8::Local<v8::Context> context); |
| |
| private: |
| // Method to run a given v8::Function. Curried in for testing. |
| binding::RunJSFunction call_js_; |
| |
| EventListenersChangedMethod listeners_changed_; |
| |
| DISALLOW_COPY_AND_ASSIGN(APIEventHandler); |
| }; |
| |
| } // namespace extensions |
| |
| #endif // EXTENSIONS_RENDERER_API_EVENT_HANDLER_H_ |