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95 lines
3.6 KiB
Objective-C
95 lines
3.6 KiB
Objective-C
//
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// ASCollectionViewLayoutInspector.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/ASDimension.h>
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#import <AsyncDisplayKit/ASScrollDirection.h>
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@class ASCollectionView;
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@protocol ASCollectionDataSource;
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@protocol ASCollectionDelegate;
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NS_ASSUME_NONNULL_BEGIN
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extern ASSizeRange NodeConstrainedSizeForScrollDirection(ASCollectionView *collectionView);
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@protocol ASCollectionViewLayoutInspecting <NSObject>
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/**
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* Asks the inspector to provide a constrained size range for the given collection view node.
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*/
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- (ASSizeRange)collectionView:(ASCollectionView *)collectionView constrainedSizeForNodeAtIndexPath:(NSIndexPath *)indexPath;
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/**
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* Return the directions in which your collection view can scroll
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*/
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- (ASScrollDirection)scrollableDirections;
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@optional
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/**
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* Asks the inspector to provide a constrained size range for the given supplementary node.
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*/
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- (ASSizeRange)collectionView:(ASCollectionView *)collectionView constrainedSizeForSupplementaryNodeOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath;
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/**
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* Asks the inspector for the number of supplementary views for the given kind in the specified section.
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*/
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- (NSUInteger)collectionView:(ASCollectionView *)collectionView supplementaryNodesOfKind:(NSString *)kind inSection:(NSUInteger)section;
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/**
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* Allow the inspector to respond to delegate changes.
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*
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* @discussion A great time to update perform selector caches!
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*/
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- (void)didChangeCollectionViewDelegate:(nullable id<ASCollectionDelegate>)delegate;
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/**
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* Allow the inspector to respond to dataSource changes.
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*
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* @discussion A great time to update perform selector caches!
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*/
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- (void)didChangeCollectionViewDataSource:(nullable id<ASCollectionDataSource>)dataSource;
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#pragma mark Deprecated Methods
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/**
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* Asks the inspector for the number of supplementary sections in the collection view for the given kind.
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*
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* @deprecated This method will not be called, and it is only deprecated as a reminder to remove it.
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* Supplementary elements must exist in the same sections as regular collection view items i.e. -numberOfSectionsInCollectionView:
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*/
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- (NSUInteger)collectionView:(ASCollectionView *)collectionView numberOfSectionsForSupplementaryNodeOfKind:(NSString *)kind ASDISPLAYNODE_DEPRECATED_MSG("Use ASCollectionNode's method instead.");
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@end
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/**
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* A layout inspector for non-flow layouts that returns a constrained size to let the cells layout itself as
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* far as possible based on the scrollable direction of the collection view.
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* It doesn't support supplementary nodes and therefore doesn't implement delegate methods
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* that are related to supplementary node's management.
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*
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* @warning This class is not meant to be subclassed and will be restricted in the future.
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*/
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@interface ASCollectionViewLayoutInspector : NSObject <ASCollectionViewLayoutInspecting>
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- (instancetype)initWithCollectionView:(ASCollectionView *)collectionView ASDISPLAYNODE_DEPRECATED_MSG("Use -init instead.");
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@end
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NS_ASSUME_NONNULL_END
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