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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.
79 lines
3.0 KiB
Objective-C
79 lines
3.0 KiB
Objective-C
//
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// ASCollectionFlowLayoutDelegate.m
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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/ASCollectionFlowLayoutDelegate.h>
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#import <AsyncDisplayKit/ASCellNode+Internal.h>
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#import <AsyncDisplayKit/ASCollectionLayoutState.h>
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#import <AsyncDisplayKit/ASCollectionElement.h>
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#import <AsyncDisplayKit/ASCollectionLayoutContext.h>
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#import <AsyncDisplayKit/ASCollectionLayoutDefines.h>
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#import <AsyncDisplayKit/ASCollections.h>
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#import <AsyncDisplayKit/ASElementMap.h>
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#import <AsyncDisplayKit/ASLayout.h>
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#import <AsyncDisplayKit/ASStackLayoutSpec.h>
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@implementation ASCollectionFlowLayoutDelegate {
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ASScrollDirection _scrollableDirections;
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}
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- (instancetype)init
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{
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return [self initWithScrollableDirections:ASScrollDirectionVerticalDirections];
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}
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- (instancetype)initWithScrollableDirections:(ASScrollDirection)scrollableDirections
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{
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self = [super init];
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if (self) {
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_scrollableDirections = scrollableDirections;
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}
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return self;
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}
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- (ASScrollDirection)scrollableDirections
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{
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ASDisplayNodeAssertMainThread();
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return _scrollableDirections;
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}
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- (id)additionalInfoForLayoutWithElements:(ASElementMap *)elements
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{
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ASDisplayNodeAssertMainThread();
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return nil;
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}
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+ (ASCollectionLayoutState *)calculateLayoutWithContext:(ASCollectionLayoutContext *)context
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{
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ASElementMap *elements = context.elements;
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NSArray<ASCellNode *> *children = ASArrayByFlatMapping(elements.itemElements, ASCollectionElement *element, element.node);
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if (children.count == 0) {
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return [[ASCollectionLayoutState alloc] initWithContext:context];
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}
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ASStackLayoutSpec *stackSpec = [ASStackLayoutSpec stackLayoutSpecWithDirection:ASStackLayoutDirectionHorizontal
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spacing:0
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justifyContent:ASStackLayoutJustifyContentStart
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alignItems:ASStackLayoutAlignItemsStart
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flexWrap:ASStackLayoutFlexWrapWrap
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alignContent:ASStackLayoutAlignContentStart
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children:children];
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stackSpec.concurrent = YES;
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ASSizeRange sizeRange = ASSizeRangeForCollectionLayoutThatFitsViewportSize(context.viewportSize, context.scrollableDirections);
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ASLayout *layout = [stackSpec layoutThatFits:sizeRange];
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return [[ASCollectionLayoutState alloc] initWithContext:context layout:layout getElementBlock:^ASCollectionElement * _Nullable(ASLayout * _Nonnull sublayout) {
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ASCellNode *node = ASDynamicCast(sublayout.layoutElement, ASCellNode);
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return node ? node.collectionElement : nil;
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}];
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}
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@end
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