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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.
57 lines
1.5 KiB
Plaintext
57 lines
1.5 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 "ASOverlayLayoutSpec.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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@implementation ASOverlayLayoutSpec
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{
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id<ASLayoutable> _overlay;
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id<ASLayoutable> _child;
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}
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+ (instancetype)newWithChild:(id<ASLayoutable>)child overlay:(id<ASLayoutable>)overlay
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{
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ASOverlayLayoutSpec *spec = [super new];
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if (spec) {
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ASDisplayNodeAssertNotNil(child, @"Child that will be overlayed on shouldn't be nil");
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spec->_overlay = overlay;
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spec->_child = child;
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}
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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 overlay on top of it.
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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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contentsLayout.position = CGPointZero;
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NSMutableArray *sublayouts = [NSMutableArray arrayWithObject:contentsLayout];
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if (_overlay) {
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ASLayout *overlayLayout = [_overlay measureWithSizeRange:{contentsLayout.size, contentsLayout.size}];
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overlayLayout.position = CGPointZero;
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[sublayouts addObject:overlayLayout];
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}
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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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