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https://github.com/Swiftgram/Telegram-iOS.git
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e1fd58268c
- -layoutSpecThatFits: must return an ASLayoutSpec. - Move ASDisplayNode's -measureWithSizeRange: redeclaration to ASDisplayNode.h. - Rename ASStackLayoutChild.h to ASStackLayoutDefines.h. - Rename ASStaticLayoutSpecDimension.h to ASRelativeSize.h. - Don't import ASLayout.h in other headers to prevent circular inclusions. - Explain use cases of ASLayout's initializers. - Clean up ASInternalHelpers.h.
63 lines
1.6 KiB
Plaintext
63 lines
1.6 KiB
Plaintext
/*
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* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#import "ASBackgroundLayoutSpec.h"
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#import "ASAssert.h"
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#import "ASBaseDefines.h"
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#import "ASLayout.h"
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@interface ASBackgroundLayoutSpec ()
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{
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id<ASLayoutable> _child;
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id<ASLayoutable> _background;
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}
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@end
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@implementation ASBackgroundLayoutSpec
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+ (instancetype)newWithChild:(id<ASLayoutable>)child background:(id<ASLayoutable>)background
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{
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if (child == nil) {
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return nil;
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}
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ASBackgroundLayoutSpec *spec = [super new];
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spec->_child = child;
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spec->_background = background;
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return spec;
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}
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+ (instancetype)new
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{
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ASDISPLAYNODE_NOT_DESIGNATED_INITIALIZER();
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}
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/**
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First layout the contents, then fit the background image.
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*/
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- (ASLayout *)measureWithSizeRange:(ASSizeRange)constrainedSize
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{
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ASLayout *contentsLayout = [_child measureWithSizeRange:constrainedSize];
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NSMutableArray *sublayouts = [NSMutableArray arrayWithCapacity:2];
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if (_background) {
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// Size background to exactly the same size.
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ASLayout *backgroundLayout = [_background measureWithSizeRange:{contentsLayout.size, contentsLayout.size}];
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backgroundLayout.position = CGPointZero;
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[sublayouts addObject:backgroundLayout];
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}
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contentsLayout.position = CGPointZero;
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[sublayouts addObject:contentsLayout];
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return [ASLayout newWithLayoutableObject:self size:contentsLayout.size sublayouts:sublayouts];
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}
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@end
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