/** * Copyright (c) 2015-present, Facebook, Inc. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. */ #include "EventEmitter.h" #include namespace facebook { namespace react { EventEmitter::EventEmitter(const EventTarget &eventTarget, const Tag &tag, const SharedEventDispatcher &eventDispatcher): eventTarget_(eventTarget), tag_(tag), eventDispatcher_(eventDispatcher) { } EventEmitter::~EventEmitter() { auto &&eventDispatcher = eventDispatcher_.lock(); if (eventDispatcher && eventTarget_) { eventDispatcher->releaseEventTarget(eventTarget_); } } void EventEmitter::dispatchEvent( const std::string &type, const folly::dynamic &payload, const EventPriority &priority ) const { const auto &eventDispatcher = eventDispatcher_.lock(); if (!eventDispatcher) { return; } assert(eventTarget_ && "Attempted to dispatch an event without an eventTarget."); // Mixing `target` into `payload`. assert(payload.isObject()); folly::dynamic extendedPayload = folly::dynamic::object("target", tag_); extendedPayload.merge_patch(payload); // TODO(T29610783): Reconsider using dynamic dispatch here. eventDispatcher->dispatchEvent(eventTarget_, type, extendedPayload, priority); } } // namespace react } // namespace facebook