153 lines
4.3 KiB
Plaintext
153 lines
4.3 KiB
Plaintext
// Implementation adapted from `react-native-safe-area-context`:
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// https://github.com/AppAndFlow/react-native-safe-area-context/tree/v5.6.1
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#import "RNSSafeAreaViewShadowView.h"
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#if !RCT_NEW_ARCH_ENABLED
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#import <React/RCTAssert.h>
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#include <math.h>
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#import "RNSSafeAreaViewEdges.h"
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#import "RNSSafeAreaViewLocalData.h"
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// From RCTShadowView.m
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typedef NS_ENUM(unsigned int, meta_prop_t) {
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META_PROP_LEFT,
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META_PROP_TOP,
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META_PROP_RIGHT,
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META_PROP_BOTTOM,
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META_PROP_HORIZONTAL,
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META_PROP_VERTICAL,
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META_PROP_ALL,
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META_PROP_COUNT,
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};
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@implementation RNSSafeAreaViewShadowView {
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RNSSafeAreaViewLocalData *_localData;
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bool _needsUpdate;
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YGValue _marginMetaProps[META_PROP_COUNT];
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}
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- (instancetype)init
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{
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self = [super init];
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if (self) {
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_needsUpdate = false;
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for (unsigned int ii = 0; ii < META_PROP_COUNT; ii++) {
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_marginMetaProps[ii] = YGValueUndefined;
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}
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}
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return self;
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}
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- (void)extractEdges:(YGValue[])_metaProps
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top:(CGFloat *)top
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right:(CGFloat *)right
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bottom:(CGFloat *)bottom
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left:(CGFloat *)left
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{
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if (_metaProps[META_PROP_ALL].unit == YGUnitPoint) {
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*top = _metaProps[META_PROP_ALL].value;
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*right = _metaProps[META_PROP_ALL].value;
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*bottom = _metaProps[META_PROP_ALL].value;
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*left = _metaProps[META_PROP_ALL].value;
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}
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if (_metaProps[META_PROP_HORIZONTAL].unit == YGUnitPoint) {
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*right = _metaProps[META_PROP_HORIZONTAL].value;
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*left = _metaProps[META_PROP_HORIZONTAL].value;
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}
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if (_metaProps[META_PROP_VERTICAL].unit == YGUnitPoint) {
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*top = _metaProps[META_PROP_VERTICAL].value;
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*bottom = _metaProps[META_PROP_VERTICAL].value;
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}
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if (_metaProps[META_PROP_TOP].unit == YGUnitPoint) {
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*top = _metaProps[META_PROP_TOP].value;
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}
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if (_metaProps[META_PROP_RIGHT].unit == YGUnitPoint) {
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*right = _metaProps[META_PROP_RIGHT].value;
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}
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if (_metaProps[META_PROP_BOTTOM].unit == YGUnitPoint) {
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*bottom = _metaProps[META_PROP_BOTTOM].value;
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}
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if (_metaProps[META_PROP_LEFT].unit == YGUnitPoint) {
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*left = _metaProps[META_PROP_LEFT].value;
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}
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}
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- (void)updateInsets
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{
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if (_localData == nil) {
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return;
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}
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UIEdgeInsets insets = _localData.insets;
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RNSSafeAreaViewEdges edges = _localData.edges;
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CGFloat top = 0;
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CGFloat right = 0;
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CGFloat bottom = 0;
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CGFloat left = 0;
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[self extractEdges:_marginMetaProps top:&top right:&right bottom:&bottom left:&left];
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super.marginTop =
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(YGValue){static_cast<float>([self getEdgeValue:edges.top insetValue:insets.top edgeValue:top]), YGUnitPoint};
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super.marginRight = (YGValue){
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static_cast<float>([self getEdgeValue:edges.right insetValue:insets.right edgeValue:right]), YGUnitPoint};
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super.marginBottom = (YGValue){
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static_cast<float>([self getEdgeValue:edges.bottom insetValue:insets.bottom edgeValue:bottom]), YGUnitPoint};
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super.marginLeft =
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(YGValue){static_cast<float>([self getEdgeValue:edges.left insetValue:insets.left edgeValue:left]), YGUnitPoint};
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}
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- (CGFloat)getEdgeValue:(BOOL)edgeMode insetValue:(CGFloat)insetValue edgeValue:(CGFloat)edgeValue
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{
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return edgeMode ? insetValue + edgeValue : edgeValue;
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}
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- (void)didSetProps:(NSArray<NSString *> *)changedProps
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{
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if (_needsUpdate) {
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_needsUpdate = false;
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[self updateInsets];
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}
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[super didSetProps:changedProps];
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}
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- (void)setLocalData:(RNSSafeAreaViewLocalData *)localData
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{
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RCTAssert(
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[localData isKindOfClass:[RNSSafeAreaViewLocalData class]],
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@"Local data object for `RNSSafeAreaViewShadowView` must be `RNSSafeAreaViewLocalData` instance.");
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_localData = localData;
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_needsUpdate = false;
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[self updateInsets];
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[super didSetProps:@[ @"marginTop", @"marginRight", @"marginBottom", @"marginLeft" ]];
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}
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#define SHADOW_VIEW_MARGIN_PROP(edge, metaProp) \
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-(void)setMargin##edge : (YGValue)value \
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{ \
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[super setMargin##edge:value]; \
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_needsUpdate = true; \
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_marginMetaProps[META_PROP_##metaProp] = value; \
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}
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SHADOW_VIEW_MARGIN_PROP(, ALL);
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SHADOW_VIEW_MARGIN_PROP(Vertical, VERTICAL);
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SHADOW_VIEW_MARGIN_PROP(Horizontal, HORIZONTAL);
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SHADOW_VIEW_MARGIN_PROP(Top, TOP);
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SHADOW_VIEW_MARGIN_PROP(Right, RIGHT);
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SHADOW_VIEW_MARGIN_PROP(Bottom, BOTTOM);
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SHADOW_VIEW_MARGIN_PROP(Left, LEFT);
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@end
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#endif // !RCT_NEW_ARCH_ENABLED
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