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Move most of the batch fetching logic to a central place for ASTableView and ASCollectionView usage

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This commit is contained in:
Michael Schneider
2016-04-08 19:42:14 -07:00
parent 40fe1f3ac7
commit 24ca09ee6c
4 changed files with 219 additions and 199 deletions
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27
AsyncDisplayKit/Private/ASBatchFetching.h
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@@ -10,27 +10,26 @@
#import "ASBatchContext.h"
#import "ASScrollDirection.h"
#import "ASBaseDefines.h"
ASDISPLAYNODE_EXTERN_C_BEGIN
@protocol ASBatchFetchingScrollView <NSObject>
- (BOOL)canBatchFetch;
- (ASBatchContext *)batchContext;
- (CGFloat)leadingScreensForBatching;
@end
/**
@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 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.
@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.
@param context The scroll view that in-flight fetches are happening.
@param scrollDirection The current scrolling direction of the scroll view.
@param targetOffset The offset that the scrollview will scroll to.
@return Whether or not the current state should proceed with batch fetching.
*/
extern BOOL ASDisplayShouldFetchBatchForContext(ASBatchContext *context,
ASScrollDirection scrollDirection,
CGRect bounds,
CGSize contentSize,
CGPoint targetOffset,
CGFloat leadingScreens);
BOOL ASDisplayShouldFetchBatchForScrollView(UIScrollView<ASBatchFetchingScrollView> *scrollView, ASScrollDirection scrollDirection, CGPoint contentOffset);
ASDISPLAYNODE_EXTERN_C_END