mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
David Vacca
1ae76bf0dd
Summary: This diff removes the inner folder of react/renderer/core, moving all its files into react/renderer/core This is necessary to simplify the compilation of Fabric in OSS More details: https://fb.quip.com/amaRA631DX3K changelog: [internal] Internal Reviewed By: fkgozali, JoshuaGross Differential Revision: D22875854 fbshipit-source-id: e2d969c3ec67eab1bbdc9288e5a4285c740fa944
100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
/*
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <memory>
|
|
#include <mutex>
|
|
|
|
#include <folly/dynamic.h>
|
|
#include <react/renderer/core/EventDispatcher.h>
|
|
#include <react/renderer/core/EventPriority.h>
|
|
#include <react/renderer/core/EventTarget.h>
|
|
#include <react/renderer/core/ReactPrimitives.h>
|
|
|
|
namespace facebook {
|
|
namespace react {
|
|
|
|
class EventEmitter;
|
|
|
|
using SharedEventEmitter = std::shared_ptr<const EventEmitter>;
|
|
|
|
/*
|
|
* Base class for all particular typed event handlers.
|
|
* Stores a pointer to `EventTarget` identifying a particular component and
|
|
* a weak pointer to `EventDispatcher` which is responsible for delivering the
|
|
* event.
|
|
*/
|
|
class EventEmitter {
|
|
public:
|
|
using Shared = std::shared_ptr<EventEmitter const>;
|
|
|
|
static std::mutex &DispatchMutex();
|
|
|
|
static ValueFactory defaultPayloadFactory();
|
|
|
|
EventEmitter(
|
|
SharedEventTarget eventTarget,
|
|
Tag tag,
|
|
EventDispatcher::Weak eventDispatcher);
|
|
|
|
virtual ~EventEmitter() = default;
|
|
|
|
/*
|
|
* Enables/disables event emitter.
|
|
* Enabled event emitter retains a pointer to `eventTarget` strongly (as
|
|
* `std::shared_ptr`) whereas disabled one don't.
|
|
* Enabled/disabled state is also proxied to `eventTarget` where it indicates
|
|
* a possibility to extract JSI value from it.
|
|
* The enable state is additive; a number of `enable` calls should be equal to
|
|
* a number of `disable` calls to release the event target.
|
|
* `DispatchMutex` must be acquired before calling.
|
|
*/
|
|
void setEnabled(bool enabled) const;
|
|
|
|
protected:
|
|
#ifdef ANDROID
|
|
// We need this temporarily due to lack of Java-counterparts for particular
|
|
// subclasses.
|
|
public:
|
|
#endif
|
|
|
|
/*
|
|
* Initiates an event delivery process.
|
|
* Is used by particular subclasses only.
|
|
*/
|
|
void dispatchEvent(
|
|
const std::string &type,
|
|
const ValueFactory &payloadFactory =
|
|
EventEmitter::defaultPayloadFactory(),
|
|
const EventPriority &priority = EventPriority::AsynchronousBatched) const;
|
|
|
|
void dispatchEvent(
|
|
const std::string &type,
|
|
const folly::dynamic &payload,
|
|
const EventPriority &priority = EventPriority::AsynchronousBatched) const;
|
|
|
|
void dispatchUniqueEvent(
|
|
const std::string &type,
|
|
const ValueFactory &payloadFactory =
|
|
EventEmitter::defaultPayloadFactory()) const;
|
|
|
|
private:
|
|
void toggleEventTargetOwnership_() const;
|
|
|
|
friend class UIManagerBinding;
|
|
|
|
mutable SharedEventTarget eventTarget_;
|
|
|
|
EventDispatcher::Weak eventDispatcher_;
|
|
mutable int enableCounter_{0};
|
|
mutable bool isEnabled_{false};
|
|
};
|
|
|
|
} // namespace react
|
|
} // namespace facebook
|