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65 lines
2.5 KiB
Objective-C
65 lines
2.5 KiB
Objective-C
//
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// ASCollectionLayoutState.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 <UIKit/UIKit.h>
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#import <AsyncDisplayKit/ASBaseDefines.h>
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@class ASElementMap, ASCollectionElement, ASLayout;
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NS_ASSUME_NONNULL_BEGIN
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AS_SUBCLASSING_RESTRICTED
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@interface ASCollectionLayoutState : NSObject
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/// The elements used to calculate this object
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@property (nonatomic, strong, readonly) ASElementMap *elements;
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@property (nonatomic, assign, readonly) CGSize contentSize;
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/// Element to layout attributes map. Should use weak pointers for elements.
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@property (nonatomic, strong, readonly) NSMapTable<ASCollectionElement *, UICollectionViewLayoutAttributes *> *elementToLayoutArrtibutesMap;
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- (instancetype)init __unavailable;
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/**
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* Designated initializer.
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*
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* @param elements The elements used to calculate this object
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*
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* @param contentSize The content size of the collection's layout
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*
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* @param elementToLayoutArrtibutesMap Map between elements to their layout attributes. The map may contain all elements, or a subset of them and will be updated later.
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* Also, it should have NSMapTableObjectPointerPersonality and NSMapTableWeakMemory as key options.
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*/
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- (instancetype)initWithElements:(ASElementMap *)elements contentSize:(CGSize)contentSize elementToLayoutArrtibutesMap:(NSMapTable<ASCollectionElement *, UICollectionViewLayoutAttributes *> *)elementToLayoutArrtibutesMap NS_DESIGNATED_INITIALIZER;
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/**
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* Convenience initializer.
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*
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* @param elements The elements used to calculate this object
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*
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* @param layout The layout describes size and position of all elements, or a subset of them and will be updated later.
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*
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* @discussion The sublayouts that describe position of elements must be direct children of the root layout object parameter.
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*/
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- (instancetype)initWithElements:(ASElementMap *)elements layout:(ASLayout *)layout;
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@end
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NS_ASSUME_NONNULL_END
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