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https://github.com/Swiftgram/Telegram-iOS.git
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f8531f467d
- The code is forked from LayoutComponents in ComponentKit. - Public interfaces are modified to be strictly Objective-C. As a result, users are not forced to switch to Objective-C++, the linker can happily compile and Swift fans can continue using the mighty ASDK.
94 lines
2.7 KiB
Plaintext
94 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 "ASStaticLayoutNode.h"
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#import "ASLayoutNodeUtilities.h"
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#import "ASLayoutNodeSubclass.h"
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#import "ASInternalHelpers.h"
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@implementation ASStaticLayoutNodeChild
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+ (instancetype)newWithPosition:(CGPoint)position node:(ASLayoutNode *)node size:(ASRelativeSizeRange)size
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{
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ASStaticLayoutNodeChild *c = [super new];
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if (c) {
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c->_position = position;
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c->_node = node;
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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 node:(ASLayoutNode *)node
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{
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return [self newWithPosition:position node:node size:{}];
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}
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@end
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@implementation ASStaticLayoutNode
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{
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NSArray *_children;
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}
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+ (instancetype)newWithSize:(ASLayoutNodeSize)size
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children:(NSArray *)children
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{
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ASStaticLayoutNode *n = [super newWithSize:size];
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if (n) {
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n->_children = children;
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}
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return n;
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}
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+ (instancetype)newWithChildren:(NSArray *)children
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{
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return [self newWithSize:{} children:children];
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}
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- (ASLayout *)computeLayoutThatFits:(ASSizeRange)constrainedSize
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{
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CGSize size = {
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isinf(constrainedSize.max.width) ? kASLayoutNodeParentDimensionUndefined : constrainedSize.max.width,
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isinf(constrainedSize.max.height) ? kASLayoutNodeParentDimensionUndefined : constrainedSize.max.height
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};
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NSMutableArray *layoutChildren = [NSMutableArray arrayWithCapacity:_children.count];
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for (ASStaticLayoutNodeChild *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 = ASRelativeSizeRangeResolveSizeRange(child.size, size, {{0,0}, autoMaxSize});
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ASLayoutChild *layoutChild = [ASLayoutChild newWithPosition:child.position
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layout:[child.node layoutThatFits:childConstraint parentSize: size]];
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[layoutChildren addObject:layoutChild];
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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 (ASLayoutChild *child in layoutChildren) {
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size.width = MAX(size.width, child.position.x + child.layout.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 (ASLayoutChild *child in layoutChildren) {
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size.height = MAX(size.height, child.position.y + child.layout.size.height);
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}
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}
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return [ASLayout newWithNode:self size:ASSizeRangeClamp(constrainedSize, size) children:layoutChildren];
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}
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@end
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