124 lines
3.0 KiB
Objective-C
124 lines
3.0 KiB
Objective-C
// Copyright 2004-present Facebook. All Rights Reserved.
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#import "RCTWrapperShadowView.h"
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#import <React/RCTBridge.h>
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#import <React/RCTUIManager.h>
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#import "RCTWrapperView.h"
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@implementation RCTWrapperShadowView
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{
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__weak RCTBridge *_bridge;
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RCTWrapperMeasureBlock _measureBlock;
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CGSize _intrinsicContentSize;
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}
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- (instancetype)initWithBridge:(RCTBridge *)bridge
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{
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if (self = [super init]) {
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_bridge = bridge;
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YGNodeSetMeasureFunc(self.yogaNode, RCTWrapperShadowViewMeasure);
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}
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return self;
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}
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static YGSize RCTWrapperShadowViewMeasure(YGNodeRef node, float width, YGMeasureMode widthMode, float height, YGMeasureMode heightMode)
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{
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CGSize minimumSize = CGSizeMake(0, 0);
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CGSize maximumSize = CGSizeMake(INFINITY, INFINITY);
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switch (widthMode) {
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case YGMeasureModeUndefined:
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break;
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case YGMeasureModeExactly:
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minimumSize.width = width;
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maximumSize.width = width;
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break;
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case YGMeasureModeAtMost:
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maximumSize.width = width;
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break;
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}
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switch (heightMode) {
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case YGMeasureModeUndefined:
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break;
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case YGMeasureModeExactly:
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minimumSize.height = height;
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maximumSize.height = height;
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break;
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case YGMeasureModeAtMost:
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maximumSize.height = height;
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break;
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}
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RCTWrapperShadowView *shadowView = (__bridge RCTWrapperShadowView *)YGNodeGetContext(node);
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CGSize size = [shadowView measureWithMinimumSize:minimumSize maximumSize:maximumSize];
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return (YGSize){size.width, size.height};
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}
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- (CGSize)measureWithMinimumSize:(CGSize)minimumSize maximumSize:(CGSize)maximumSize
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{
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dispatch_time_t timeout = dispatch_time(DISPATCH_TIME_NOW, 0.1 * NSEC_PER_SEC);
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if (!_measureBlock) {
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RCTBridge *bridge = _bridge;
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__block RCTWrapperMeasureBlock measureBlock;
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NSNumber *reactTag = self.reactTag;
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dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
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dispatch_async(dispatch_get_main_queue(), ^{
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RCTUIManager *uiManager = bridge.uiManager;
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RCTWrapperView *view = (RCTWrapperView *)[uiManager viewForReactTag:reactTag];
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measureBlock = view.measureBlock;
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dispatch_semaphore_signal(semaphore);
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});
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if (dispatch_semaphore_wait(semaphore, timeout)) {
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RCTLogError(@"Unable to retrieve `measureBlock` for view (%@) because the main thread is busy.", self);
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}
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_measureBlock = measureBlock;
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}
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if (!_measureBlock) {
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return maximumSize;
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}
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__block CGSize size = maximumSize;
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dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
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dispatch_async(dispatch_get_main_queue(), ^{
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size = self->_measureBlock(minimumSize, maximumSize);
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dispatch_semaphore_signal(semaphore);
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});
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if (dispatch_semaphore_wait(semaphore, timeout)) {
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RCTLogError(@"Unable to compute layout for view (%@) because the main thread is busy.", self);
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}
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return size;
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}
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- (BOOL)isYogaLeafNode
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{
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return YES;
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}
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- (CGSize)intrinsicContentSize
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{
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return _intrinsicContentSize;
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}
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- (void)setIntrinsicContentSize:(CGSize)size
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{
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_intrinsicContentSize = size;
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YGNodeMarkDirty(self.yogaNode);
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}
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@end
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