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ca2885cf06
* Implement ASPageTable - It is a screen page table that can be used to quickly filter out objects in a certain rect without checking each and every one of them. - ASCollectionLayoutState generates and keeps a table that maps page to layout attributes within that page. - ASCollectionLayout (and later, ASCollectionGalleryLayoutDelegate) consults its layout state for `layoutAttributesForElementsInRect:`. This ensures the method can return as quickly as possible, especially on a large data set (I heard some people have galleries with thousands of photos!). * Address comments * Handle items that span multiple pages * Make danger happy
38 lines
1.4 KiB
Objective-C
38 lines
1.4 KiB
Objective-C
//
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// ASCollectionFlowLayoutDelegate.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 <AsyncDisplayKit/ASCollectionLayoutDelegate.h>
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#import <AsyncDisplayKit/ASScrollDirection.h>
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NS_ASSUME_NONNULL_BEGIN
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AS_SUBCLASSING_RESTRICTED
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/**
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* A thread-safe, high performant layout delegate that arranges items into a flow layout.
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* It uses a concurrent and multi-line ASStackLayoutSpec under the hood. Thus, per-child flex properties (i.e alignSelf,
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* flexShrink, flexGrow, etc - see @ASStackLayoutElement) can be set directly on cell nodes to be used
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* to calculate the final collection layout.
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*/
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@interface ASCollectionFlowLayoutDelegate : NSObject <ASCollectionLayoutDelegate>
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- (instancetype)initWithScrollableDirections:(ASScrollDirection)scrollableDirections NS_DESIGNATED_INITIALIZER;
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@end
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NS_ASSUME_NONNULL_END
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