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
99 lines
2.6 KiB
C++
99 lines
2.6 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 <cstdint>
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namespace facebook {
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namespace react {
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/*
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* A set of predefined traits associated with a particular `ShadowNode` class
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* and an instance of that class. Used for efficient checking for interface
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* conformance for and storing important flags.
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*/
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class ShadowNodeTraits {
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public:
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/*
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* Underlying type for the traits.
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* The first 16 bits are reserved for Core.
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*/
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enum Trait : int32_t {
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None = 0,
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// Note:
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// Not all traits are used yet (but all will be used in the near future).
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// Inherits `LayoutableShadowNode`.
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LayoutableKind = 1 << 0,
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// Inherits `YogaLayoutableShadowNode`.
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YogaLayoutableKind = 1 << 1,
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// Inherits `ConcreteViewShadowNode<>` template.
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ViewKind = 1 << 2,
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// Inherits `BaseTextShadowNode`.
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TextKind = 1 << 3,
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// Used when calculating relative layout in
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// LayoutableShadowNode::getRelativeLayoutMetrics. This trait marks node as
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// root, so when calculating relative layout, the calculation will not
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// traverse beyond this node. See T61257516 for details.
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RootNodeKind = 1 << 4,
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// `ViewShadowNode` (exact!) class.
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View = 1 << 5,
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// The node is hidden.
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// Nodes with this trait (and all their descendants) will not produce views.
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Hidden = 1 << 6,
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// Inherits `YogaLayoutableShadowNode` and enforces that the `YGNode` is a
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// leaf.
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LeafYogaNode = 1 << 10,
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// Inherits `LayoutableShadowNode` and calls `measure()`.
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HasMeasure = 1 << 11,
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// Indicates that the `ShadowNode` must form a stacking context (a level
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// of the hierarchy; `ShadowView`s formed by descendants the node will be
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// descendants of a `ShadowView` formed by the node).
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FormsStackingContext = 1 << 13,
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// Indicates that the node must form a `ShadowView`.
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FormsView = 1 << 14,
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// Internal to `ShadowNode`; do not use it outside.
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// Indicates that `children` list is shared between nodes and need
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// to be cloned before the first mutation.
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ChildrenAreShared = 1 << 15,
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};
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/*
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* Sets, unsets, and checks individual traits.
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*/
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inline void set(Trait trait) {
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traits_ = ShadowNodeTraits::Trait(traits_ | trait);
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}
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inline void unset(Trait trait) {
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traits_ = ShadowNodeTraits::Trait(traits_ & ~trait);
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}
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inline bool check(Trait traits) const {
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return ShadowNodeTraits::Trait(traits_ & traits) == traits;
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}
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private:
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Trait traits_{Trait::None};
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};
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} // namespace react
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} // namespace facebook
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