88 lines
2.7 KiB
C++
88 lines
2.7 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 "BitUtils.h"
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#include "YGFloatOptional.h"
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#include "Yoga-internal.h"
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using namespace facebook::yoga;
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struct YGLayout {
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std::array<float, 4> position = {};
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std::array<float, 2> dimensions = {{YGUndefined, YGUndefined}};
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std::array<float, 4> margin = {};
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std::array<float, 4> border = {};
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std::array<float, 4> padding = {};
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private:
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static constexpr size_t directionOffset = 0;
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static constexpr size_t didUseLegacyFlagOffset =
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directionOffset + facebook::yoga::detail::bitWidthFn<YGDirection>();
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static constexpr size_t doesLegacyStretchFlagAffectsLayoutOffset =
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didUseLegacyFlagOffset + 1;
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static constexpr size_t hadOverflowOffset =
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doesLegacyStretchFlagAffectsLayoutOffset + 1;
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uint8_t flags = 0;
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public:
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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 = YGDirectionInherit;
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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 = {{YGUndefined, YGUndefined}};
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YGCachedMeasurement cachedLayout = YGCachedMeasurement();
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YGDirection direction() const {
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return facebook::yoga::detail::getEnumData<YGDirection>(
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flags, directionOffset);
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}
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void setDirection(YGDirection direction) {
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facebook::yoga::detail::setEnumData<YGDirection>(
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flags, directionOffset, direction);
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}
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bool didUseLegacyFlag() const {
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return facebook::yoga::detail::getBooleanData(
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flags, didUseLegacyFlagOffset);
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}
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void setDidUseLegacyFlag(bool val) {
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facebook::yoga::detail::setBooleanData(flags, didUseLegacyFlagOffset, val);
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}
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bool doesLegacyStretchFlagAffectsLayout() const {
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return facebook::yoga::detail::getBooleanData(
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flags, doesLegacyStretchFlagAffectsLayoutOffset);
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}
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void setDoesLegacyStretchFlagAffectsLayout(bool val) {
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facebook::yoga::detail::setBooleanData(
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flags, doesLegacyStretchFlagAffectsLayoutOffset, val);
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}
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bool hadOverflow() const {
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return facebook::yoga::detail::getBooleanData(flags, hadOverflowOffset);
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}
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void setHadOverflow(bool hadOverflow) {
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facebook::yoga::detail::setBooleanData(
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flags, hadOverflowOffset, hadOverflow);
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}
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bool operator==(YGLayout layout) const;
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bool operator!=(YGLayout layout) const { return !(*this == layout); }
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};
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