mirror of
https://github.com/Swiftgram/Telegram-iOS.git
synced 2025-09-07 13:09:49 +00:00
103 lines
3.0 KiB
Plaintext
103 lines
3.0 KiB
Plaintext
/*
|
|
* Copyright (c) 2014-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*
|
|
*/
|
|
|
|
#import "ASStaticLayoutSpec.h"
|
|
|
|
#import "ASLayoutSpecUtilities.h"
|
|
#import "ASInternalHelpers.h"
|
|
#import "ASLayout.h"
|
|
|
|
@implementation ASStaticLayoutSpecChild
|
|
|
|
+ (instancetype)staticLayoutChildWithPosition:(CGPoint)position layoutableObject:(id<ASLayoutable>)layoutableObject size:(ASRelativeSizeRange)size;
|
|
{
|
|
ASStaticLayoutSpecChild *c = [[super alloc] init];
|
|
if (c) {
|
|
c->_position = position;
|
|
c->_layoutableObject = layoutableObject;
|
|
c->_size = size;
|
|
}
|
|
return c;
|
|
}
|
|
|
|
+ (instancetype)staticLayoutChildWithPosition:(CGPoint)position layoutableObject:(id<ASLayoutable>)layoutableObject
|
|
{
|
|
return [self staticLayoutChildWithPosition:position layoutableObject:layoutableObject size:ASRelativeSizeRangeUnconstrained];
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation ASStaticLayoutSpec
|
|
{
|
|
NSArray *_children;
|
|
}
|
|
|
|
+ (instancetype)staticLayoutSpecWithChildren:(NSArray *)children
|
|
{
|
|
return [[self alloc] initWithChildren:children];
|
|
}
|
|
|
|
- (instancetype)initWithChildren:(NSArray *)children
|
|
{
|
|
if (!(self = [super init])) {
|
|
return nil;
|
|
}
|
|
_children = children;
|
|
return self;
|
|
}
|
|
|
|
- (void)addChild:(ASStaticLayoutSpecChild *)child
|
|
{
|
|
ASDisplayNodeAssert(self.isMutable, @"Cannot set properties when layout spec is not mutable");
|
|
_children = [_children arrayByAddingObject:child];
|
|
}
|
|
|
|
- (ASLayout *)measureWithSizeRange:(ASSizeRange)constrainedSize
|
|
{
|
|
CGSize size = {
|
|
constrainedSize.max.width,
|
|
constrainedSize.max.height
|
|
};
|
|
|
|
NSMutableArray *sublayouts = [NSMutableArray arrayWithCapacity:_children.count];
|
|
for (ASStaticLayoutSpecChild *child in _children) {
|
|
CGSize autoMaxSize = {
|
|
constrainedSize.max.width - child.position.x,
|
|
constrainedSize.max.height - child.position.y
|
|
};
|
|
ASSizeRange childConstraint = ASRelativeSizeRangeEqualToRelativeSizeRange(ASRelativeSizeRangeUnconstrained, child.size)
|
|
? ASSizeRangeMake({0, 0}, autoMaxSize)
|
|
: ASRelativeSizeRangeResolve(child.size, size);
|
|
ASLayout *sublayout = [child.layoutableObject measureWithSizeRange:childConstraint];
|
|
sublayout.position = child.position;
|
|
[sublayouts addObject:sublayout];
|
|
}
|
|
|
|
if (isnan(size.width)) {
|
|
size.width = constrainedSize.min.width;
|
|
for (ASLayout *sublayout in sublayouts) {
|
|
size.width = MAX(size.width, sublayout.position.x + sublayout.size.width);
|
|
}
|
|
}
|
|
|
|
if (isnan(size.height)) {
|
|
size.height = constrainedSize.min.height;
|
|
for (ASLayout *sublayout in sublayouts) {
|
|
size.height = MAX(size.height, sublayout.position.y + sublayout.size.height);
|
|
}
|
|
}
|
|
|
|
return [ASLayout layoutWithLayoutableObject:self
|
|
size:ASSizeRangeClamp(constrainedSize, size)
|
|
sublayouts:sublayouts];
|
|
}
|
|
|
|
@end
|