mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Samuel Susla
7796b7e9af
Summary: `StateTarget` no longer uses `shared_from_this`, this allows us to remove need for `enable_shared_from_this` I decided to put `state->commit` call inside `ShadowTree.cpp` because I needed to have access to `shared_ptr` of shadow node from outside of the class itself. `state->commit` was originally designed to be only called by `ShadowNode` but this does not seem to be the case anymore since it is called from `UIManager` as well. changelog: [internal] Reviewed By: shergin Differential Revision: D18032532 fbshipit-source-id: 75c874fd04f86adc07bfddbef3a0384e17c2067b
58 lines
1.2 KiB
C++
58 lines
1.2 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <memory>
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namespace facebook {
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namespace react {
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class ShadowNode;
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/*
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* Represents an entity that receives state update.
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* Practically, just a wrapper around shared a pointer to ShadowNode. We need
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* this mostly to avoid circular dependency problems.
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*/
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class StateTarget {
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public:
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/*
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* Creates an empty target.
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*/
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explicit StateTarget();
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/*
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* Creates a target which points to a given `ShadowNode`.
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*/
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explicit StateTarget(std::shared_ptr<ShadowNode const> shadowNode);
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/*
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* Copyable and moveable.
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*/
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StateTarget(const StateTarget &other) = default;
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StateTarget &operator=(const StateTarget &other) = default;
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StateTarget(StateTarget &&other) noexcept = default;
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StateTarget &operator=(StateTarget &&other) = default;
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/*
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* Returns `true` is the target is not empty.
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*/
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operator bool() const;
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/*
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* Returns a reference to a stored `ShadowNode`.
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*/
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const ShadowNode &getShadowNode() const;
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private:
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std::shared_ptr<ShadowNode const> shadowNode_;
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};
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} // namespace react
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} // namespace facebook
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