react-native/React/Views/SafeAreaView/RCTSafeAreaView.m

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/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#import "RCTSafeAreaView.h"
#import <React/RCTBridge.h>
#import <React/RCTUIManager.h>
#import "RCTSafeAreaViewLocalData.h"
@implementation RCTSafeAreaView {
__weak RCTBridge *_bridge;
UIEdgeInsets _currentSafeAreaInsets;
}
- (instancetype)initWithBridge:(RCTBridge *)bridge
{
if (self = [super initWithFrame:CGRectZero]) {
_bridge = bridge;
}
return self;
}
RCT_NOT_IMPLEMENTED(- (instancetype)initWithCoder:(NSCoder *)decoder)
RCT_NOT_IMPLEMENTED(- (instancetype)initWithFrame:(CGRect)frame)
#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 110000 /* __IPHONE_11_0 */
static BOOL UIEdgeInsetsEqualToEdgeInsetsWithThreshold(UIEdgeInsets insets1, UIEdgeInsets insets2, CGFloat threshold) {
return
ABS(insets1.left - insets2.left) <= threshold &&
ABS(insets1.right - insets2.right) <= threshold &&
ABS(insets1.top - insets2.top) <= threshold &&
ABS(insets1.bottom - insets2.bottom) <= threshold;
}
- (void)safeAreaInsetsDidChange
{
if (![self respondsToSelector:@selector(safeAreaInsets)]) {
return;
}
UIEdgeInsets safeAreaInsets = self.safeAreaInsets;
if (UIEdgeInsetsEqualToEdgeInsetsWithThreshold(safeAreaInsets, _currentSafeAreaInsets, 1.0 / RCTScreenScale())) {
return;
}
_currentSafeAreaInsets = safeAreaInsets;
RCTSafeAreaViewLocalData *localData =
[[RCTSafeAreaViewLocalData alloc] initWithInsets:safeAreaInsets];
[_bridge.uiManager setLocalData:localData forView:self];
}
#endif
@end