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

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

submodules/AsyncDisplayKit/Source/Private/ASBatchFetching.h

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+//
+//  ASBatchFetching.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 <UIKit/UIKit.h>
+
+#import <AsyncDisplayKit/ASScrollDirection.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class ASBatchContext;
+@protocol ASBatchFetchingDelegate;
+
+@protocol ASBatchFetchingScrollView <NSObject>
+
+- (BOOL)canBatchFetch;
+- (ASBatchContext *)batchContext;
+- (CGFloat)leadingScreensForBatching;
+- (nullable id<ASBatchFetchingDelegate>)batchFetchingDelegate;
+
+@end
+
+/**
+ @abstract Determine if batch fetching should begin based on the state of the parameters.
+ @discussion This method is broken into a category for unit testing purposes and should be used with the ASTableView and
+ * ASCollectionView batch fetching API.
+ @param scrollView The scroll view that in-flight fetches are happening.
+ @param scrollDirection The current scrolling direction of the scroll view.
+ @param scrollableDirections The possible scrolling directions of the scroll view.
+ @param contentOffset The offset that the scrollview will scroll to.
+ @param velocity The velocity of the scroll view (in points) at the moment the touch was released.
+ @return Whether or not the current state should proceed with batch fetching.
+ */
+AS_EXTERN BOOL ASDisplayShouldFetchBatchForScrollView(UIScrollView<ASBatchFetchingScrollView> *scrollView,
+                                            ASScrollDirection scrollDirection,
+                                            ASScrollDirection scrollableDirections,
+                                            CGPoint contentOffset,
+                                            CGPoint velocity);
+
+
+/**
+ @abstract Determine if batch fetching should begin based on the state of the parameters.
+ @param context The batch fetching context that contains knowledge about in-flight fetches.
+ @param scrollDirection The current scrolling direction of the scroll view.
+ @param scrollableDirections The possible scrolling directions of the scroll view.
+ @param bounds The bounds of the scrollview.
+ @param contentSize The content size of the scrollview.
+ @param targetOffset The offset that the scrollview will scroll to.
+ @param leadingScreens How many screens in the remaining distance will trigger batch fetching.
+ @param visible Whether the view is visible or not.
+ @param velocity The velocity of the scroll view (in points) at the moment the touch was released.
+ @param delegate The delegate to be consulted if needed.
+ @return Whether or not the current state should proceed with batch fetching.
+ @discussion This method is broken into a category for unit testing purposes and should be used with the ASTableView and
+ * ASCollectionView batch fetching API.
+ */
+AS_EXTERN BOOL ASDisplayShouldFetchBatchForContext(ASBatchContext *context,
+                                                ASScrollDirection scrollDirection,
+                                                ASScrollDirection scrollableDirections,
+                                                CGRect bounds,
+                                                CGSize contentSize,
+                                                CGPoint targetOffset,
+                                                CGFloat leadingScreens,
+                                                BOOL visible,
+                                                CGPoint velocity,
+                                                _Nullable id<ASBatchFetchingDelegate> delegate);
+
+NS_ASSUME_NONNULL_END
+
+#endif