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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.
104 lines
3.1 KiB
Objective-C
104 lines
3.1 KiB
Objective-C
//
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// ASCollectionLayoutContext.m
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// Texture
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//
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// 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/ASCollectionLayoutContext.h>
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#import <AsyncDisplayKit/ASCollectionLayoutContext+Private.h>
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#import <AsyncDisplayKit/ASAssert.h>
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#import <AsyncDisplayKit/ASCollectionLayoutDelegate.h>
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#import <AsyncDisplayKit/ASCollectionLayoutCache.h>
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#import <AsyncDisplayKit/ASElementMap.h>
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#import <AsyncDisplayKit/ASEqualityHelpers.h>
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#import <AsyncDisplayKit/ASHashing.h>
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@implementation ASCollectionLayoutContext {
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Class<ASCollectionLayoutDelegate> _layoutDelegateClass;
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__weak ASCollectionLayoutCache *_layoutCache;
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}
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- (instancetype)initWithViewportSize:(CGSize)viewportSize
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initialContentOffset:(CGPoint)initialContentOffset
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scrollableDirections:(ASScrollDirection)scrollableDirections
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elements:(ASElementMap *)elements
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layoutDelegateClass:(Class<ASCollectionLayoutDelegate>)layoutDelegateClass
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layoutCache:(ASCollectionLayoutCache *)layoutCache
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additionalInfo:(id)additionalInfo
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{
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self = [super init];
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if (self) {
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_viewportSize = viewportSize;
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_initialContentOffset = initialContentOffset;
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_scrollableDirections = scrollableDirections;
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_elements = elements;
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_layoutDelegateClass = layoutDelegateClass;
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_layoutCache = layoutCache;
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_additionalInfo = additionalInfo;
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}
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return self;
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}
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- (Class<ASCollectionLayoutDelegate>)layoutDelegateClass
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{
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return _layoutDelegateClass;
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}
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- (ASCollectionLayoutCache *)layoutCache
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{
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return _layoutCache;
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}
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// NOTE: Some properties, like initialContentOffset and layoutCache are ignored in -isEqualToContext: and -hash.
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// That is because contexts can be equal regardless of the content offsets or layout caches.
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- (BOOL)isEqualToContext:(ASCollectionLayoutContext *)context
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{
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if (context == nil) {
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return NO;
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}
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// NOTE: ASObjectIsEqual returns YES when both objects are nil.
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// So don't use ASObjectIsEqual on _elements.
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// It is a weak property and 2 layouts generated from different sets of elements
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// should never be considered the same even if they are nil now.
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return CGSizeEqualToSize(_viewportSize, context.viewportSize)
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&& _scrollableDirections == context.scrollableDirections
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&& [_elements isEqual:context.elements]
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&& _layoutDelegateClass == context.layoutDelegateClass
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&& ASObjectIsEqual(_additionalInfo, context.additionalInfo);
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}
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- (BOOL)isEqual:(id)other
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{
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if (self == other) {
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return YES;
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}
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if (! [other isKindOfClass:[ASCollectionLayoutContext class]]) {
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return NO;
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}
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return [self isEqualToContext:other];
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}
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- (NSUInteger)hash
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{
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struct {
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CGSize viewportSize;
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ASScrollDirection scrollableDirections;
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NSUInteger elementsHash;
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NSUInteger layoutDelegateClassHash;
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NSUInteger additionalInfoHash;
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} data = {
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_viewportSize,
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_scrollableDirections,
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_elements.hash,
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_layoutDelegateClass.hash,
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[_additionalInfo hash]
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};
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return ASHashBytes(&data, sizeof(data));
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}
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@end
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