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52 lines
1.8 KiB
Objective-C
52 lines
1.8 KiB
Objective-C
//
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// ASSupplementaryNodeSource.h
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// Texture
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//
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// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the /ASDK-Licenses directory of this source tree. An additional
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// grant of patent rights can be found in the PATENTS file in the same directory.
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//
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// Modifications to this file made after 4/13/2017 are: Copyright (c) 2017-present,
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// Pinterest, Inc. Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// 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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/**
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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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@optional
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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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