c46ea9c6f5
Summary: X-link: https://github.com/facebook/react-native/pull/41317 Pull Request resolved: https://github.com/facebook/yoga/pull/1449 This aims to clean up the public Yoga C API, by: 1. Documenting public YGNode, YGValue, YGConfig APIs 2. Splitting APIs for specific objects into different header files (because Yoga.h was big enough without documentation) 3. Reordering headers and definitions for consistent grouping Changelog: [Internal] Reviewed By: joevilches Differential Revision: D50963424 fbshipit-source-id: 45124b7370256fc63aefd6d5b7641466e9a79d3b
85 lines
1.6 KiB
C++
85 lines
1.6 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 <stdbool.h>
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#include <yoga/YGEnums.h>
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#include <yoga/YGMacros.h>
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/**
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* Float value to represent "undefined" in style values.
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*/
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#ifdef __cplusplus
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#include <limits>
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constexpr float YGUndefined = std::numeric_limits<float>::quiet_NaN();
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#else
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#include <math.h>
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#define YGUndefined NAN
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#endif
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YG_EXTERN_C_BEGIN
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/**
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* Structure used to represent a dimension in a style.
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*/
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typedef struct YGValue {
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float value;
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YGUnit unit;
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} YGValue;
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/**
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* Constant for a dimension of "auto".
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*/
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YG_EXPORT extern const YGValue YGValueAuto;
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/**
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* Constant for a dimension which is not defined.
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*/
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YG_EXPORT extern const YGValue YGValueUndefined;
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/**
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* Constant for a dimension that is zero-length.
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*/
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YG_EXPORT extern const YGValue YGValueZero;
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/**
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* Whether a dimension represented as a float is defined.
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*/
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YG_EXPORT bool YGFloatIsUndefined(float value);
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YG_EXTERN_C_END
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// Equality operators for comparison of YGValue in C++
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#ifdef __cplusplus
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inline bool operator==(const YGValue& lhs, const YGValue& rhs) {
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if (lhs.unit != rhs.unit) {
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return false;
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}
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switch (lhs.unit) {
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case YGUnitUndefined:
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case YGUnitAuto:
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return true;
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case YGUnitPoint:
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case YGUnitPercent:
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return lhs.value == rhs.value;
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}
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return false;
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}
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inline bool operator!=(const YGValue& lhs, const YGValue& rhs) {
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return !(lhs == rhs);
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}
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inline YGValue operator-(const YGValue& value) {
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return {-value.value, value.unit};
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}
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#endif
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