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* [License] Simplify the Texture license to be pure Apache 2 (removing ASDK-Licenses) With permission of the Facebook Open Source team, we are simplifying the Texture license so that clients can rely on the Apache 2 terms that most of Texture is already covered by. This means that code originally forked from AsyncDisplayKit will be re-licensed from "BSD 3-clause + PATENTS v2" to Apache 2 without a PATENTS file. After getting confirmation that the updates to these core files look good, we'll propagate this new license header to all files (in this same PR) and get sign-off from all parties before landing. * [License] Update all Texture source files to be pure Apache 2. * Changelog entry for Apache 2 license update. * Revert "[License] Update all Texture source files to be pure Apache 2." This reverts commit ffa0fbbba9717d871dd16c4b07539f2f8208fc2b. * [License] Update all Texture source files to be pure Apache 2, maintaining copyrights. * [License] Update CONTRIBUTING, README, Podspec & Dangerfile.
88 lines
2.1 KiB
Plaintext
88 lines
2.1 KiB
Plaintext
//
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// ASLayoutSpec+Subclasses.mm
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// Texture
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//
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// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
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// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
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// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
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//
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#import <AsyncDisplayKit/ASLayoutSpec+Subclasses.h>
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#import <AsyncDisplayKit/ASLayoutSpec.h>
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#import <AsyncDisplayKit/ASLayoutSpecPrivate.h>
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#pragma mark - ASNullLayoutSpec
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@interface ASNullLayoutSpec : ASLayoutSpec
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- (instancetype)init NS_UNAVAILABLE;
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+ (ASNullLayoutSpec *)null;
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@end
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@implementation ASNullLayoutSpec : ASLayoutSpec
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+ (ASNullLayoutSpec *)null
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{
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static ASNullLayoutSpec *sharedNullLayoutSpec = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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sharedNullLayoutSpec = [[self alloc] init];
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});
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return sharedNullLayoutSpec;
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}
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- (BOOL)isMutable
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{
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return NO;
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}
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- (ASLayout *)calculateLayoutThatFits:(ASSizeRange)constrainedSize
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{
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return [ASLayout layoutWithLayoutElement:self size:CGSizeZero];
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}
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@end
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#pragma mark - ASLayoutSpec (Subclassing)
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@implementation ASLayoutSpec (Subclassing)
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#pragma mark - Child with index
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- (void)setChild:(id<ASLayoutElement>)child atIndex:(NSUInteger)index
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{
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ASDisplayNodeAssert(self.isMutable, @"Cannot set properties when layout spec is not mutable");
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id<ASLayoutElement> layoutElement = child ?: [ASNullLayoutSpec null];
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if (child) {
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if (_childrenArray.count < index) {
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// Fill up the array with null objects until the index
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NSInteger i = _childrenArray.count;
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while (i < index) {
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_childrenArray[i] = [ASNullLayoutSpec null];
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i++;
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}
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}
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}
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// Replace object at the given index with the layoutElement
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_childrenArray[index] = layoutElement;
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}
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- (id<ASLayoutElement>)childAtIndex:(NSUInteger)index
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{
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id<ASLayoutElement> layoutElement = nil;
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if (index < _childrenArray.count) {
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layoutElement = _childrenArray[index];
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}
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// Null layoutElement should not be accessed
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ASDisplayNodeAssert(layoutElement != [ASNullLayoutSpec null], @"Access child at index without set a child at that index");
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return layoutElement;
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}
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@end
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