70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
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/*
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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 "Bitfield.h"
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#include "YGFloatOptional.h"
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#include "Yoga-internal.h"
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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 directionIdx = 0;
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static constexpr size_t didUseLegacyFlagIdx = 1;
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static constexpr size_t doesLegacyStretchFlagAffectsLayoutIdx = 2;
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static constexpr size_t hadOverflowIdx = 3;
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facebook::yoga::Bitfield<uint8_t, YGDirection, bool, bool, bool> flags_ =
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{YGDirectionInherit, false, false, false};
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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 = (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 = {{YGUndefined, YGUndefined}};
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YGCachedMeasurement cachedLayout = YGCachedMeasurement();
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YGDirection direction() const { return flags_.at<directionIdx>(); }
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decltype(flags_)::Ref<directionIdx> direction() {
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return flags_.at<directionIdx>();
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}
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bool didUseLegacyFlag() const { return flags_.at<didUseLegacyFlagIdx>(); }
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decltype(flags_)::Ref<didUseLegacyFlagIdx> didUseLegacyFlag() {
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return flags_.at<didUseLegacyFlagIdx>();
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}
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bool doesLegacyStretchFlagAffectsLayout() const {
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return flags_.at<doesLegacyStretchFlagAffectsLayoutIdx>();
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}
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decltype(flags_)::Ref<doesLegacyStretchFlagAffectsLayoutIdx>
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doesLegacyStretchFlagAffectsLayout() {
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return flags_.at<doesLegacyStretchFlagAffectsLayoutIdx>();
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}
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bool hadOverflow() const { return flags_.at<hadOverflowIdx>(); }
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decltype(flags_)::Ref<hadOverflowIdx> hadOverflow() {
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return flags_.at<hadOverflowIdx>();
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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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