95 lines
1.9 KiB
C
95 lines
1.9 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 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 "YGMacros.h"
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YG_EXTERN_C_BEGIN
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typedef struct YGNode* YGNodeRef;
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typedef struct YGConfig* YGConfigRef;
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typedef YG_ENUM_BEGIN(YGMarker){
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YGMarkerLayout,
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YGMarkerMeasure,
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YGMarkerBaselineFn,
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} YG_ENUM_END(YGMarker);
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typedef struct {
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int layouts;
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int measures;
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int maxMeasureCache;
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int cachedLayouts;
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int cachedMeasures;
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} YGMarkerLayoutData;
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typedef struct {
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bool _unused;
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} YGMarkerNoData;
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typedef union {
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YGMarkerLayoutData* layout;
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YGMarkerNoData* noData;
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} YGMarkerData;
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typedef struct {
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// accepts marker type, a node ref, and marker data (depends on marker type)
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// can return a handle or id that Yoga will pass to endMarker
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void* (*startMarker)(YGMarker, YGNodeRef, YGMarkerData);
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// accepts marker type, a node ref, marker data, and marker id as returned by
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// startMarker
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void (*endMarker)(YGMarker, YGNodeRef, YGMarkerData, void* id);
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} YGMarkerCallbacks;
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void YGConfigSetMarkerCallbacks(YGConfigRef, YGMarkerCallbacks);
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YG_EXTERN_C_END
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#ifdef __cplusplus
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namespace facebook {
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namespace yoga {
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namespace marker {
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namespace detail {
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template <YGMarker M>
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struct MarkerData;
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template <>
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struct MarkerData<YGMarkerLayout> {
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using type = YGMarkerLayoutData;
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static type*& get(YGMarkerData& d) {
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return d.layout;
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}
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};
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struct NoMarkerData {
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using type = YGMarkerNoData;
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static type*& get(YGMarkerData& d) {
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return d.noData;
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}
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};
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template <>
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struct MarkerData<YGMarkerMeasure> : NoMarkerData {};
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template <>
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struct MarkerData<YGMarkerBaselineFn> : NoMarkerData {};
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} // namespace detail
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template <YGMarker M>
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typename detail::MarkerData<M>::type* data(YGMarkerData d) {
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return detail::MarkerData<M>::get(d);
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}
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} // namespace marker
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} // namespace yoga
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} // namespace facebook
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#endif // __cplusplus
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