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a9837f2dc8
* Use NSHashTable to avoid needless -hash and -isEqual: calls * Mark debug-only methods as such for clarity * Address feedback
63 lines
2.4 KiB
Objective-C
63 lines
2.4 KiB
Objective-C
//
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// ASTableLayoutController.m
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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 <AsyncDisplayKit/ASTableLayoutController.h>
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#import <UIKit/UIKit.h>
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#import <AsyncDisplayKit/ASAssert.h>
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#import <AsyncDisplayKit/ASElementMap.h>
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@interface ASTableLayoutController()
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@end
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@implementation ASTableLayoutController
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- (instancetype)initWithTableView:(UITableView *)tableView
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{
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if (!(self = [super init])) {
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return nil;
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}
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_tableView = tableView;
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return self;
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}
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#pragma mark - ASLayoutController
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- (NSHashTable<ASCollectionElement *> *)elementsForScrolling:(ASScrollDirection)scrollDirection rangeMode:(ASLayoutRangeMode)rangeMode rangeType:(ASLayoutRangeType)rangeType map:(ASElementMap *)map
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{
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CGRect bounds = _tableView.bounds;
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ASRangeTuningParameters tuningParameters = [self tuningParametersForRangeMode:rangeMode rangeType:rangeType];
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CGRect rangeBounds = CGRectExpandToRangeWithScrollableDirections(bounds, tuningParameters, ASScrollDirectionVerticalDirections, scrollDirection);
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NSArray *array = [_tableView indexPathsForRowsInRect:rangeBounds];
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return ASPointerTableByFlatMapping(array, NSIndexPath *indexPath, [map elementForItemAtIndexPath:indexPath]);
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}
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- (void)allElementsForScrolling:(ASScrollDirection)scrollDirection rangeMode:(ASLayoutRangeMode)rangeMode displaySet:(NSHashTable<ASCollectionElement *> *__autoreleasing _Nullable *)displaySet preloadSet:(NSHashTable<ASCollectionElement *> *__autoreleasing _Nullable *)preloadSet map:(ASElementMap *)map
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{
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if (displaySet == NULL || preloadSet == NULL) {
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return;
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}
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*displaySet = [self elementsForScrolling:scrollDirection rangeMode:rangeMode rangeType:ASLayoutRangeTypeDisplay map:map];
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*preloadSet = [self elementsForScrolling:scrollDirection rangeMode:rangeMode rangeType:ASLayoutRangeTypePreload map:map];
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return;
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}
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@end
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