mirror of
https://github.com/status-im/react-native.git
synced 2025-02-03 05:03:42 +00:00
eabf29e320
Summary: @public After reading about move-semantic and rvalue refs I realized that we (I) definitely overuse `auto &&` (aka universal reference) construction. Even if this is harmless, does not look good and idiomatic. Whenever I used that from a semantical point of view I always meant "I need an alias for this" which is actually "read-only reference" which is `const auto &`. This is also fit good to our policy where "everything is const (immutable) by default". Hence I change that to how it should be. Reviewed By: fkgozali Differential Revision: D8475637 fbshipit-source-id: 0a691ededa0e798db8ffa053bff0f400913ab7b8
60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
/**
|
|
* 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 <folly/dynamic.h>
|
|
|
|
namespace facebook {
|
|
namespace react {
|
|
|
|
EventEmitter::EventEmitter(const InstanceHandle &instanceHandle, const Tag &tag, const SharedEventDispatcher &eventDispatcher):
|
|
instanceHandle_(instanceHandle),
|
|
tag_(tag),
|
|
eventDispatcher_(eventDispatcher) {
|
|
if (eventDispatcher) {
|
|
eventTarget_ = createEventTarget();
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
EventTarget EventEmitter::createEventTarget() const {
|
|
const auto &eventDispatcher = eventDispatcher_.lock();
|
|
assert(eventDispatcher);
|
|
return eventDispatcher->createEventTarget(instanceHandle_);
|
|
}
|
|
|
|
} // namespace react
|
|
} // namespace facebook
|