mirror of
https://github.com/Swiftgram/Telegram-iOS.git
synced 2025-09-04 20:00:53 +00:00
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.
70 lines
2.1 KiB
Plaintext
70 lines
2.1 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"
|
|
|
|
#import "ASLayoutNodeSubclass.h"
|
|
|
|
@interface ASBackgroundLayoutNode ()
|
|
{
|
|
ASLayoutNode *_node;
|
|
ASLayoutNode *_background;
|
|
}
|
|
@end
|
|
|
|
@implementation ASBackgroundLayoutNode
|
|
|
|
+ (instancetype)newWithNode:(ASLayoutNode *)node
|
|
background:(ASLayoutNode *)background
|
|
{
|
|
if (node == nil) {
|
|
return nil;
|
|
}
|
|
ASBackgroundLayoutNode *n = [super newWithSize:{}];
|
|
n->_node = node;
|
|
n->_background = background;
|
|
return n;
|
|
}
|
|
|
|
+ (instancetype)newWithSize:(ASLayoutNodeSize)size
|
|
{
|
|
ASDISPLAYNODE_NOT_DESIGNATED_INITIALIZER();
|
|
}
|
|
|
|
/**
|
|
First layout the contents, then fit the background image.
|
|
*/
|
|
- (ASLayout *)computeLayoutThatFits:(ASSizeRange)constrainedSize
|
|
restrictedToSize:(ASLayoutNodeSize)size
|
|
relativeToParentSize:(CGSize)parentSize
|
|
{
|
|
ASDisplayNodeAssert(ASLayoutNodeSizeEqualToNodeSize(size, ASLayoutNodeSizeZero),
|
|
@"ASBackgroundLayoutNode only passes size {} to the super class initializer, but received size %@ "
|
|
"(node=%@, background=%@)", NSStringFromASLayoutNodeSize(size), _node, _background);
|
|
|
|
ASLayout *contentsLayout = [_node layoutThatFits:constrainedSize parentSize:parentSize];
|
|
|
|
NSMutableArray *children = [NSMutableArray arrayWithCapacity:2];
|
|
if (_background) {
|
|
// Size background to exactly the same size.
|
|
ASLayout *backgroundLayout = [_background layoutThatFits:{contentsLayout.size, contentsLayout.size}
|
|
parentSize:contentsLayout.size];
|
|
[children addObject:[ASLayoutChild newWithPosition:{0,0} layout:backgroundLayout]];
|
|
}
|
|
[children addObject:[ASLayoutChild newWithPosition:{0,0} layout:contentsLayout]];
|
|
|
|
return [ASLayout newWithNode:self size:contentsLayout.size children:children];
|
|
}
|
|
|
|
@end
|