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
65 lines
1.8 KiB
C++
65 lines
1.8 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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#include <memory>
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#include <react/renderer/attributedstring/AttributedString.h>
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#include <react/renderer/attributedstring/AttributedStringBox.h>
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#include <react/renderer/attributedstring/ParagraphAttributes.h>
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#include <react/renderer/core/LayoutConstraints.h>
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#include <react/renderer/textlayoutmanager/TextMeasureCache.h>
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#include <react/utils/ContextContainer.h>
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namespace facebook {
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namespace react {
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class TextLayoutManager;
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using SharedTextLayoutManager = std::shared_ptr<const TextLayoutManager>;
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/*
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* Cross platform facade for Android-specific TextLayoutManager.
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*/
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class TextLayoutManager {
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public:
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TextLayoutManager(const ContextContainer::Shared &contextContainer) {}
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/*
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* Measures `attributedStringBox` using native text rendering infrastructure.
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*/
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TextMeasurement measure(
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AttributedStringBox attributedStringBox,
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ParagraphAttributes paragraphAttributes,
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LayoutConstraints layoutConstraints,
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std::shared_ptr<void>) const;
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/*
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* Measures lines of `attributedString` using native text rendering
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* infrastructure.
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*/
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LinesMeasurements measureLines(
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AttributedString attributedString,
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ParagraphAttributes paragraphAttributes,
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Size size) const;
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/*
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* Returns an opaque pointer to platform-specific TextLayoutManager.
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* Is used on a native views layer to delegate text rendering to the manager.
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*/
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void *getNativeTextLayoutManager() const;
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std::shared_ptr<void> getHostTextStorage(
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AttributedString attributedStringBox,
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ParagraphAttributes paragraphAttributes,
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LayoutConstraints layoutConstraints) const;
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};
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} // namespace react
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} // namespace facebook
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