mirror of
https://github.com/Swiftgram/Telegram-iOS.git
synced 2025-09-01 10:23:15 +00:00
62 lines
1.6 KiB
Plaintext
62 lines
1.6 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 "ASBackgroundLayoutNode.h"
|
|
|
|
#import "ASAssert.h"
|
|
#import "ASBaseDefines.h"
|
|
|
|
@interface ASBackgroundLayoutNode ()
|
|
{
|
|
id<ASLayoutable> _child;
|
|
id<ASLayoutable> _background;
|
|
}
|
|
@end
|
|
|
|
@implementation ASBackgroundLayoutNode
|
|
|
|
+ (instancetype)newWithChild:(id<ASLayoutable>)child background:(id<ASLayoutable>)background
|
|
{
|
|
if (child == nil) {
|
|
return nil;
|
|
}
|
|
ASBackgroundLayoutNode *n = [super new];
|
|
n->_child = child;
|
|
n->_background = background;
|
|
return n;
|
|
}
|
|
|
|
+ (instancetype)new
|
|
{
|
|
ASDISPLAYNODE_NOT_DESIGNATED_INITIALIZER();
|
|
}
|
|
|
|
/**
|
|
First layout the contents, then fit the background image.
|
|
*/
|
|
- (ASLayout *)calculateLayoutThatFits:(ASSizeRange)constrainedSize
|
|
{
|
|
ASLayout *contentsLayout = [_child calculateLayoutThatFits:constrainedSize];
|
|
contentsLayout.position = CGPointZero;
|
|
|
|
NSMutableArray *children = [NSMutableArray arrayWithCapacity:2];
|
|
if (_background) {
|
|
// Size background to exactly the same size.
|
|
ASLayout *backgroundLayout = [_background calculateLayoutThatFits:{contentsLayout.size, contentsLayout.size}];
|
|
backgroundLayout.position = CGPointZero;
|
|
[children addObject:backgroundLayout];
|
|
}
|
|
[children addObject:contentsLayout];
|
|
|
|
return [ASLayout newWithLayoutableObject:self size:contentsLayout.size children:children];
|
|
}
|
|
|
|
@end
|