react-native/React/Views/RCTRootShadowView.m

44 lines
1.3 KiB
Objective-C

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTRootShadowView.h"
#import "RCTI18nUtil.h"
@implementation RCTRootShadowView
/**
* Init the RCTRootShadowView with RTL status.
* Returns a RTL CSS layout if isRTL is true (Default is LTR CSS layout).
*/
- (instancetype)init
{
self = [super init];
if (self) {
_baseDirection = [[RCTI18nUtil sharedInstance] isRTL] ? YGDirectionRTL : YGDirectionLTR;
_availableSize = CGSizeMake(INFINITY, INFINITY);
}
return self;
}
- (NSSet<RCTShadowView *> *)collectViewsWithUpdatedFrames
{
// Treating `INFINITY` as `YGUndefined` (which equals `NAN`).
float availableWidth = _availableSize.width == INFINITY ? YGUndefined : _availableSize.width;
float availableHeight = _availableSize.height == INFINITY ? YGUndefined : _availableSize.height;
YGNodeCalculateLayout(self.cssNode, availableWidth, availableHeight, _baseDirection);
NSMutableSet<RCTShadowView *> *viewsWithNewFrame = [NSMutableSet set];
[self applyLayoutNode:self.cssNode viewsWithNewFrame:viewsWithNewFrame absolutePosition:CGPointZero];
return viewsWithNewFrame;
}
@end