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https://github.com/Swiftgram/Telegram-iOS.git
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d6e5e27c39
* Remove set layout style size helper * Update API to set and get a CGSize / ASRelativeSize from an ASLayoutElementStyle - Expose ASRelativeSize type - Add new helper properties to set a size / relative size to ASLayoutElementStyle - Don't expose the size in ASLayoutElementStyle anymore and move into ASLayoutElementStylePrivate * Update examples * Update comments for size helpers
101 lines
2.9 KiB
Plaintext
101 lines
2.9 KiB
Plaintext
//
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// ASAbsoluteLayoutSpec.mm
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// AsyncDisplayKit
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//
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// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
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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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#import "ASAbsoluteLayoutSpec.h"
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#import "ASLayoutSpecUtilities.h"
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#import "ASLayout.h"
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#import "ASLayoutElementStylePrivate.h"
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@implementation ASAbsoluteLayoutSpec
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+ (instancetype)absoluteLayoutSpecWithChildren:(NSArray *)children
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{
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return [[self alloc] initWithChildren:children];
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}
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- (instancetype)init
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{
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return [self initWithChildren:@[]];
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}
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- (instancetype)initWithChildren:(NSArray *)children
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{
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if (!(self = [super init])) {
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return nil;
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}
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self.children = children;
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return self;
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}
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- (ASLayout *)calculateLayoutThatFits:(ASSizeRange)constrainedSize
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{
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// TODO: layout: isValidForLayout() call should not be necessary if INFINITY is used
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CGSize size = {
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(isinf(constrainedSize.max.width) || !ASPointsAreValidForLayout(constrainedSize.max.width)) ? ASLayoutElementParentDimensionUndefined : constrainedSize.max.width,
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(isinf(constrainedSize.max.height) || !ASPointsAreValidForLayout(constrainedSize.max.height)) ? ASLayoutElementParentDimensionUndefined : constrainedSize.max.height
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};
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NSArray *children = self.children;
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NSMutableArray *sublayouts = [NSMutableArray arrayWithCapacity:children.count];
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for (id<ASLayoutElement> child in children) {
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CGPoint layoutPosition = child.style.layoutPosition;
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CGSize autoMaxSize = {
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constrainedSize.max.width - layoutPosition.x,
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constrainedSize.max.height - layoutPosition.y
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};
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const ASSizeRange childConstraint = ASLayoutElementSizeResolveAutoSize(child.style.size, size, {{0,0}, autoMaxSize});
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ASLayout *sublayout = [child layoutThatFits:childConstraint parentSize:size];
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sublayout.position = layoutPosition;
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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 layoutWithLayoutElement:self size:ASSizeRangeClamp(constrainedSize, size) sublayouts:sublayouts];
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}
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@end
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@implementation ASAbsoluteLayoutSpec (ASEnvironment)
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- (BOOL)supportsUpwardPropagation
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{
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return NO;
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}
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@end
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@implementation ASAbsoluteLayoutSpec (Debugging)
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#pragma mark - ASLayoutElementAsciiArtProtocol
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- (NSString *)debugBoxString
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{
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return [ASLayoutSpec asciiArtStringForChildren:self.children parentName:[self asciiArtName]];
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}
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@end
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