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
148 lines
4.0 KiB
C++
148 lines
4.0 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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#include <better/mutex.h>
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#include <react/renderer/core/EventEmitter.h>
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#include <react/renderer/core/ReactPrimitives.h>
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#include <react/renderer/core/ShadowNodeFamilyFragment.h>
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namespace facebook {
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namespace react {
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class ComponentDescriptor;
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class ShadowNode;
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class State;
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/*
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* Represents all things that shadow nodes from the same family have in common.
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* To be used inside `ShadowNode` class *only*.
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*/
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class ShadowNodeFamily {
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public:
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using Shared = std::shared_ptr<ShadowNodeFamily const>;
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using Weak = std::weak_ptr<ShadowNodeFamily const>;
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using AncestorList = better::small_vector<
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std::pair<
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std::reference_wrapper<ShadowNode const> /* parentNode */,
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int /* childIndex */>,
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64>;
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ShadowNodeFamily(
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ShadowNodeFamilyFragment const &fragment,
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EventDispatcher::Weak eventDispatcher,
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ComponentDescriptor const &componentDescriptor);
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/*
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* Sets the parent.
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* This is not technically thread-safe, but practically it mutates the object
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* only once (and the model enforces that this first call is not concurrent).
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*/
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void setParent(ShadowNodeFamily::Shared const &parent) const;
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/*
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* Returns a handle (or name) associated with the component.
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*/
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ComponentHandle getComponentHandle() const;
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ComponentName getComponentName() const;
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/*
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* Returns a concrete `ComponentDescriptor` that manages nodes of this type.
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*/
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const ComponentDescriptor &getComponentDescriptor() const;
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/*
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* Returns a list of all ancestors of the node relative to the given ancestor.
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* The list starts from the given ancestor node and ends with the parent node
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* of `this` node. The elements of the list have a reference to some parent
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* node and an index of the child of the parent node.
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* Returns an empty array if there is no ancestor-descendant relationship.
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* Can be called from any thread.
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* The theoretical complexity of the algorithm is `O(ln(n))`. Use it wisely.
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*/
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AncestorList getAncestors(ShadowNode const &ancestorShadowNode) const;
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SurfaceId getSurfaceId() const;
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/*
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* Sets and gets the most recent state.
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*/
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std::shared_ptr<State const> getMostRecentState() const;
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void setMostRecentState(std::shared_ptr<State const> const &state) const;
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/*
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* Dispatches a state update with given priority.
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*/
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void dispatchRawState(StateUpdate &&stateUpdate, EventPriority priority)
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const;
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private:
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friend ShadowNode;
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friend ShadowNodeFamilyFragment;
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friend State;
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/*
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* Returns the most recent state if the given `state` is obsolete,
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* otherwise returns `nullptr`.
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* To be used by `State` only.
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*/
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std::shared_ptr<State const> getMostRecentStateIfObsolete(
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State const &state) const;
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EventDispatcher::Weak eventDispatcher_;
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mutable std::shared_ptr<State const> mostRecentState_;
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mutable better::shared_mutex mutex_;
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/*
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* Deprecated.
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*/
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Tag const tag_;
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/*
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* Identifier of a running Surface instance.
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*/
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SurfaceId const surfaceId_;
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/*
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* `EventEmitter` associated with all nodes of the family.
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*/
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SharedEventEmitter const eventEmitter_;
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/*
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* Reference to a concrete `ComponentDescriptor` that manages nodes of this
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* type.
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*/
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ComponentDescriptor const &componentDescriptor_;
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/*
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* ComponentHandle and ComponentName must be stored (cached) inside the object
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* to allow retrieving these values without accessing a `ComponentDescriptor`
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* object (because it can be already deallocated).
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*/
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ComponentHandle componentHandle_;
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ComponentName componentName_;
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/*
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* Points to a family of all parent nodes of all nodes of the family.
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*/
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mutable ShadowNodeFamily::Weak parent_{};
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/*
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* Represents a case where `parent_` is `nullptr`.
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* For optimization purposes only.
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*/
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mutable bool hasParent_{false};
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};
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} // namespace react
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} // namespace facebook
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