mirror of
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.
97 lines
2.7 KiB
Plaintext
97 lines
2.7 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 "ASStaticLayoutSpec.h"
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#import "ASLayoutSpecUtilities.h"
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#import "ASInternalHelpers.h"
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#import "ASLayout.h"
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@implementation ASStaticLayoutSpecChild
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+ (instancetype)newWithPosition:(CGPoint)position layoutableObject:(id<ASLayoutable>)layoutableObject size:(ASRelativeSizeRange)size
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{
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ASStaticLayoutSpecChild *c = [super new];
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if (c) {
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c->_position = position;
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c->_layoutableObject = layoutableObject;
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c->_size = size;
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}
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return c;
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}
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+ (instancetype)newWithPosition:(CGPoint)position layoutableObject:(id<ASLayoutable>)layoutableObject
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{
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return [self newWithPosition:position layoutableObject:layoutableObject size:ASRelativeSizeRangeUnconstrained];
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}
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@end
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@implementation ASStaticLayoutSpec
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{
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NSArray *_children;
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}
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+ (instancetype)newWithChildren:(NSArray *)children
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{
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ASStaticLayoutSpec *spec = [super new];
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if (spec) {
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spec->_children = children;
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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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- (ASLayout *)measureWithSizeRange:(ASSizeRange)constrainedSize
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{
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CGSize size = {
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constrainedSize.max.width,
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constrainedSize.max.height
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};
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NSMutableArray *sublayouts = [NSMutableArray arrayWithCapacity:_children.count];
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for (ASStaticLayoutSpecChild *child in _children) {
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CGSize autoMaxSize = {
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constrainedSize.max.width - child.position.x,
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constrainedSize.max.height - child.position.y
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};
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ASSizeRange childConstraint = ASRelativeSizeRangeEqualToRelativeSizeRange(ASRelativeSizeRangeUnconstrained, child.size)
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? ASSizeRangeMake({0, 0}, autoMaxSize)
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: ASRelativeSizeRangeResolve(child.size, size);
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ASLayout *sublayout = [child.layoutableObject measureWithSizeRange:childConstraint];
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sublayout.position = child.position;
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[sublayouts addObject:sublayout];
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}
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if (isnan(size.width)) {
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size.width = constrainedSize.min.width;
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for (ASLayout *sublayout in sublayouts) {
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size.width = MAX(size.width, sublayout.position.x + sublayout.size.width);
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}
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}
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if (isnan(size.height)) {
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size.height = constrainedSize.min.height;
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for (ASLayout *sublayout in sublayouts) {
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size.height = MAX(size.height, sublayout.position.y + sublayout.size.height);
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}
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}
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return [ASLayout newWithLayoutableObject:self
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size:ASSizeRangeClamp(constrainedSize, size)
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sublayouts:sublayouts];
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}
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@end
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