mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Samuel Susla
d41e95fb1a
Summary: changelog: [internal] This diff introduces a mechanism to cache NSTextStorage on Paragraph's state. The old renderer already has caching for NSTextStorage: https://github.com/facebook/react-native/blob/main/Libraries/Text/Text/RCTTextShadowView.m#L21 Fabric will store `NSTextStorage` inside `ParagraphLayoutManager` which is owned by state. There is one notable change which is not gated: Paragraph's state strongly owns `TextLayoutManager`, not `ParagraphShadowNode` like previously. This shouldn't change anything Reviewed By: mdvacca Differential Revision: D43692171 fbshipit-source-id: efe6077222a30ab6d89abd9916534b9a96e745d4
46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and 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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namespace facebook {
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namespace react {
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/*
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* Contains the set of feature flags for the renderer core.
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* Some of them are temporary and may be eventualy phased out
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* as soon as the feature is fully implemented.
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*/
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class CoreFeatures {
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public:
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// Specifies whether the iterator-style prop parsing is enabled.
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static bool enablePropIteratorSetter;
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// This is used as a feature flag for *all* PropsX structs.
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// For MapBuffer to be used for a particular component instance,
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// its ShadowNode traits must set the MapBuffer trait; and this
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// must be set to "true" globally.
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static bool enableMapBuffer;
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// When enabled, Fabric will block paint to allow for state updates in
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// useLayoutEffect hooks to be processed. This changes affects scheduling of
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// when a transaction is mounted.
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static bool blockPaintForUseLayoutEffect;
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// Whether to use Hermes' NativeState instead of HostObject
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// in simple data passing scenarios with JS
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static bool useNativeState;
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// Creating NSTextStorage is relatively expensive operation and we were
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// creating it twice. Once when measuring text and once when rendering it.
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// This flag caches it inside ParagraphState.
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static bool cacheNSTextStorage;
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};
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} // namespace react
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} // namespace facebook
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