51 lines
1.5 KiB
C++
51 lines
1.5 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 LICENSE
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* file in the root directory of this source tree.
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*/
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#pragma once
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#include "YGFloatOptional.h"
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#include "Yoga-internal.h"
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constexpr std::array<float, 2> kYGDefaultDimensionValues = {
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{YGUndefined, YGUndefined}};
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struct YGLayout {
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std::array<float, 4> position = {};
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std::array<float, 2> dimensions = kYGDefaultDimensionValues;
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std::array<float, 6> margin = {};
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std::array<float, 6> border = {};
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std::array<float, 6> padding = {};
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YGDirection direction : 2;
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bool didUseLegacyFlag : 1;
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bool doesLegacyStretchFlagAffectsLayout : 1;
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bool hadOverflow : 1;
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uint32_t computedFlexBasisGeneration = 0;
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YGFloatOptional computedFlexBasis = {};
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// Instead of recomputing the entire layout every single time, we cache some
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// information to break early when nothing changed
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uint32_t generationCount = 0;
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YGDirection lastOwnerDirection = (YGDirection) -1;
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uint32_t nextCachedMeasurementsIndex = 0;
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std::array<YGCachedMeasurement, YG_MAX_CACHED_RESULT_COUNT>
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cachedMeasurements = {};
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std::array<float, 2> measuredDimensions = kYGDefaultDimensionValues;
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YGCachedMeasurement cachedLayout = YGCachedMeasurement();
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YGLayout()
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: direction(YGDirectionInherit),
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didUseLegacyFlag(false),
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doesLegacyStretchFlagAffectsLayout(false),
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hadOverflow(false) {}
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bool operator==(YGLayout layout) const;
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bool operator!=(YGLayout layout) const {
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return !(*this == layout);
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}
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};
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