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01dbc86778
* make variable naming reflect ASEnvironmentTraitCollection vs ASTraitCollection * move trait propagation to cell allocation instead of via a nested block * move trait propagation when setting a displaynode's supernode instead of when adding a subnode * fixed misspelling of "colection"
48 lines
1.3 KiB
Plaintext
48 lines
1.3 KiB
Plaintext
//
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// ASIndexedNodeContext.m
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// AsyncDisplayKit
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//
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// Created by Huy Nguyen on 2/28/16.
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// Copyright © 2016 Facebook. All rights reserved.
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//
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#import "ASIndexedNodeContext.h"
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#import "ASEnvironmentInternal.h"
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#import "ASCellNode.h"
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@interface ASIndexedNodeContext ()
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/// Required node block used to allocate a cell node. Nil after the first execution.
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@property (nonatomic, strong) ASCellNodeBlock nodeBlock;
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@end
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@implementation ASIndexedNodeContext
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- (instancetype)initWithNodeBlock:(ASCellNodeBlock)nodeBlock
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indexPath:(NSIndexPath *)indexPath
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constrainedSize:(ASSizeRange)constrainedSize
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environmentTraitCollection:(ASEnvironmentTraitCollection)environmentTraitCollection
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{
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NSAssert(nodeBlock != nil && indexPath != nil, @"Node block and index path must not be nil");
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self = [super init];
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if (self) {
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_nodeBlock = nodeBlock;
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_indexPath = indexPath;
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_constrainedSize = constrainedSize;
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_environmentTraitCollection = environmentTraitCollection;
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}
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return self;
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}
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- (ASCellNode *)allocateNode
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{
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NSAssert(_nodeBlock != nil, @"Node block is gone. Should not execute it more than once");
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ASCellNode *node = _nodeBlock();
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_nodeBlock = nil;
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ASEnvironmentStatePropagateDown(node, _environmentTraitCollection);
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return node;
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}
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@end
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