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52 lines
1.7 KiB
Objective-C
52 lines
1.7 KiB
Objective-C
//
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// ASSupplementaryNodeSource.h
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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 <Foundation/Foundation.h>
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#import <AsyncDisplayKit/ASBlockTypes.h>
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#import <AsyncDisplayKit/ASDimension.h>
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NS_ASSUME_NONNULL_BEGIN
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@protocol ASSupplementaryNodeSource <NSObject>
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@optional
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/**
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* A method to provide the node-block for the supplementary element.
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*
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* @param elementKind The kind of supplementary element.
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* @param index The index of the item.
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* @return A node block for the supplementary element.
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* @see collectionNode:nodeForSupplementaryElementOfKind:atIndexPath:
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*/
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- (ASCellNodeBlock)nodeBlockForSupplementaryElementOfKind:(NSString *)elementKind atIndex:(NSInteger)index;
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/**
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* Asks the controller to provide a node to display for the given supplementary element.
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*
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* @param kind The kind of supplementary element.
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* @param index The index of the item.
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*/
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- (ASCellNode *)nodeForSupplementaryElementOfKind:(NSString *)kind atIndex:(NSInteger)index;
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/**
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* A method to provide the size range used for measuring the supplementary
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* element of the given kind at the given index.
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*
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* @param elementKind The kind of supplementary element.
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* @param index The index of the item.
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* @return A size range used for asynchronously measuring the node.
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* @see collectionNode:constrainedSizeForSupplementaryElementOfKind:atIndexPath:
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*/
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- (ASSizeRange)sizeRangeForSupplementaryElementOfKind:(NSString *)elementKind atIndex:(NSInteger)index;
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@end
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NS_ASSUME_NONNULL_END
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