Add 'submodules/AsyncDisplayKit/' from commit '02bedc12816e251ad71777f9d2578329b6d2bef6'

git-subtree-dir: submodules/AsyncDisplayKit
git-subtree-mainline: d06f423e0e
git-subtree-split: 02bedc1281

submodules/AsyncDisplayKit/Source/Details/ASCollectionLayoutState.h

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+//
+//  ASCollectionLayoutState.h
+//  Texture
+//
+//  Copyright (c) Facebook, Inc. and its affiliates.  All rights reserved.
+//  Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc.  All rights reserved.
+//  Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
+//
+
+#ifndef MINIMAL_ASDK
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+#import <AsyncDisplayKit/ASBaseDefines.h>
+
+@class ASCollectionLayoutContext, ASLayout, ASCollectionElement;
+
+NS_ASSUME_NONNULL_BEGIN
+
+typedef ASCollectionElement * _Nullable (^ASCollectionLayoutStateGetElementBlock)(ASLayout *);
+
+@interface NSMapTable (ASCollectionLayoutConvenience)
+
++ (NSMapTable<ASCollectionElement *, UICollectionViewLayoutAttributes *> *)elementToLayoutAttributesTable;
+
+@end
+
+AS_SUBCLASSING_RESTRICTED
+
+/// An immutable state of the collection layout
+@interface ASCollectionLayoutState : NSObject
+
+/// The context used to calculate this object
+@property (readonly) ASCollectionLayoutContext *context;
+
+/// The final content size of the collection's layout
+@property (readonly) CGSize contentSize;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Designated initializer.
+ *
+ * @param context The context used to calculate this object
+ *
+ * @param contentSize The content size of the collection's layout
+ *
+ * @param table A map between elements to their layout attributes. It must contain all elements.
+ * It should have NSMapTableObjectPointerPersonality and NSMapTableWeakMemory as key options.
+ */
+- (instancetype)initWithContext:(ASCollectionLayoutContext *)context
+                    contentSize:(CGSize)contentSize
+ elementToLayoutAttributesTable:(NSMapTable<ASCollectionElement *, UICollectionViewLayoutAttributes *> *)table NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Convenience initializer. Returns an object with zero content size and an empty table.
+ *
+ * @param context The context used to calculate this object
+ */
+- (instancetype)initWithContext:(ASCollectionLayoutContext *)context;
+
+/**
+ * Convenience initializer.
+ *
+ * @param context The context used to calculate this object
+ *
+ * @param layout The layout describes size and position of all elements.
+ *
+ * @param getElementBlock A block that can retrieve the collection element from a sublayout of the root layout.
+ */
+- (instancetype)initWithContext:(ASCollectionLayoutContext *)context
+                         layout:(ASLayout *)layout
+                getElementBlock:(ASCollectionLayoutStateGetElementBlock)getElementBlock;
+
+/**
+ * Returns all layout attributes present in this object.
+ */
+- (NSArray<UICollectionViewLayoutAttributes *> *)allLayoutAttributes;
+
+/**
+ * Returns layout attributes of elements in the specified rect.
+ *
+ * @param rect The rect containing the target elements.
+ */
+- (NSArray<UICollectionViewLayoutAttributes *> *)layoutAttributesForElementsInRect:(CGRect)rect;
+
+/**
+ * Returns layout attributes of the element at the specified index path.
+ *
+ * @param indexPath The index path of the item.
+ */
+- (nullable UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)indexPath;
+
+/**
+ * Returns layout attributes of the specified supplementary element.
+ *
+ * @param kind A string that identifies the type of the supplementary element.
+ *
+ * @param indexPath The index path of the element.
+ */
+- (nullable UICollectionViewLayoutAttributes *)layoutAttributesForSupplementaryElementOfKind:(NSString *)kind
+                                                                                 atIndexPath:(NSIndexPath *)indexPath;
+
+/**
+ * Returns layout attributes of the specified element.
+ *
+ * @element The element.
+ */
+- (nullable UICollectionViewLayoutAttributes *)layoutAttributesForElement:(ASCollectionElement *)element;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif