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* Introduce ASCollectionViewLayout - `ASCollectionViewLayout` is an async `UICollectionViewLayout` that encapsulates its layout calculation logic into a separate thread-safe object which can be used ahead of time and/or on multiple threads. - `ASDataController` now can prepare for a new layout resulted from a change set before `ASCollectionView` even knows about it. By the time the change set it ready to be consumed by `ASCollectionView`, its new layout is also ready. - New `ASCollectionViewLayoutCalculating` protocol that is simple and generic enough that many types of calculators can be built on top. `ASCollectionViewLayoutSpecCalculator` conforms to `ASCollectionViewLayoutCalculating` protocol and can be backed by any layout spec (e.g `ASStackLayoutSpec`, `PIMasonryLayoutSpec`, etc). We can even build a `ASCollectionViewLayoutYogaCalculator` that uses Yoga internally. - A built-in `ASCollectionViewFlowLayoutCalculator` that is a subclass of `ASCollectionViewLayoutSpecCalculator` and uses a multi-threaded multi-line `ASStackLayoutSpec` internally. The result is a performant and thread-safe flow layout calculator. - Finally, `ASCollectionViewLayout` can be subclassed to handle a specific type of calculator with optimizations implemented based on the knowledge of such calculator. For example, `ASCollectionViewFlowLayout` can have a highly optimized implementation of `-layoutAttributesForElementsInRect:`. Protocolize layout calculator providing and consuming Add flex wrap documentation Add a `multithreaded` flag to ASStackLayoutSpec that forces it to dispatch even if it's off main - Update ASCollectionViewFlowLayoutSpecCalculator to use that flag. Minor change in ASCollectionViewLayout Implement Mosaic layout calculator Minor change Fix project file Rename and fix project file Skip fetching constrained size only if a layout calculator is available Update examples/ASCollectionView Remove unnecessary change in ASTableView Address comments Rename collection view calculator protocols Minor changes after rebasing with master Add ASLegacyCollectionLayoutCalculator for backward compatibility Remove ASCollectionLayoutSpecCalculator Remove ASLegacyCollectionLayoutCalculator Introduce ASCollectionLayout - A wrapper object that contains content size and an element to rect table. - Collection layout calculators to return this new object instead of an ASLayout. Before adding a content cache Finishing hooking up ASCollectionLayoutDataSource to ASCollectionNode Stash Finish ASCollectionLayout Rough impl of ASCollectionFlowLayout Revert changes in CustomCollectionView example Move ASRectTable back to Private * Rename ASCollectionContentAttributes to ASCollectionLayoutState * Address other comments * Introduce ASCollectionLayoutDelegate and make ASCollectionLayout private * Address comments * API tweaks: - Replace `-layoutContextWithElementMap:` in ASCollectionLayoutDelegate with `-additionalInfoForLayoutWithElements:`. The returned object is then stored in ASCollectionLayoutContext for later lookups. - ASCollectionLayoutContext has no public initializer. - ASDataControllerLayoutDelegate no longer requires a context of type ASCollectionLayoutContext but simply an `id`. This helps decouple ASDataController and ASCollectionLayout. - Rename `elementMap` to `elements`. - Rename `visibleMap` to `visibleElements`. - Other minor changes. * Rename ASCGSizeHash to ASHashFromCGSize * Make sure to call super in -[ASCollectionLayout prepareLayout] * Update example/ASCollectionView to use ASCollectionFlowLayoutDelegate * Remove unnecessary change
54 lines
1.9 KiB
Objective-C
54 lines
1.9 KiB
Objective-C
//
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// ASTwoDimensionalArrayUtils.h
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// AsyncDisplayKit
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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 root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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#import <Foundation/Foundation.h>
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#import <AsyncDisplayKit/ASBaseDefines.h>
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NS_ASSUME_NONNULL_BEGIN
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/**
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* Helper class for operation on two-dimensional array, where the objects of the root array are each arrays
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*/
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ASDISPLAYNODE_EXTERN_C_BEGIN
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/**
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* Deep mutable copy of an array that contains arrays, which contain objects. It will go one level deep into the array to copy.
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* This method is substantially faster than the generalized version, e.g. about 10x faster, so use it whenever it fits the need.
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*/
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extern NSMutableArray<NSMutableArray *> *ASTwoDimensionalArrayDeepMutableCopy(NSArray<NSArray *> *array) AS_WARN_UNUSED_RESULT;
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/**
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* Delete the elements of the mutable two-dimensional array at given index paths – sorted in descending order!
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*/
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extern void ASDeleteElementsInTwoDimensionalArrayAtIndexPaths(NSMutableArray *mutableArray, NSArray<NSIndexPath *> *indexPaths);
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/**
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* Return all the index paths of a two-dimensional array, in ascending order.
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*/
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extern NSArray<NSIndexPath *> *ASIndexPathsForTwoDimensionalArray(NSArray<NSArray *>* twoDimensionalArray) AS_WARN_UNUSED_RESULT;
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/**
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* Return all the elements of a two-dimensional array, in ascending order.
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*/
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extern NSArray *ASElementsInTwoDimensionalArray(NSArray<NSArray *>* twoDimensionalArray) AS_WARN_UNUSED_RESULT;
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/**
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* Attempt to get the object at the given index path. Returns @c nil if the index path is out of bounds.
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*/
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extern id _Nullable ASGetElementInTwoDimensionalArray(NSArray<NSArray *> *array, NSIndexPath *indexPath) AS_WARN_UNUSED_RESULT;
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ASDISPLAYNODE_EXTERN_C_END
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NS_ASSUME_NONNULL_END
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