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* [License] Simplify the Texture license to be pure Apache 2 (removing ASDK-Licenses) With permission of the Facebook Open Source team, we are simplifying the Texture license so that clients can rely on the Apache 2 terms that most of Texture is already covered by. This means that code originally forked from AsyncDisplayKit will be re-licensed from "BSD 3-clause + PATENTS v2" to Apache 2 without a PATENTS file. After getting confirmation that the updates to these core files look good, we'll propagate this new license header to all files (in this same PR) and get sign-off from all parties before landing. * [License] Update all Texture source files to be pure Apache 2. * Changelog entry for Apache 2 license update. * Revert "[License] Update all Texture source files to be pure Apache 2." This reverts commit ffa0fbbba9717d871dd16c4b07539f2f8208fc2b. * [License] Update all Texture source files to be pure Apache 2, maintaining copyrights. * [License] Update CONTRIBUTING, README, Podspec & Dangerfile.
60 lines
2.4 KiB
Objective-C
60 lines
2.4 KiB
Objective-C
//
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// ASCollectionLayoutDelegate.h
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// Texture
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//
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// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
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// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
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// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
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//
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#import <Foundation/Foundation.h>
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#import <UIKit/UIKit.h>
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#import <AsyncDisplayKit/ASScrollDirection.h>
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@class ASElementMap, ASCollectionLayoutContext, ASCollectionLayoutState;
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NS_ASSUME_NONNULL_BEGIN
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@protocol ASCollectionLayoutDelegate <NSObject>
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/**
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* @abstract Returns the scrollable directions of the coming layout (@see @c -calculateLayoutWithContext:).
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* It will be available in the context parameter in +calculateLayoutWithContext:
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*
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* @return The scrollable directions.
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*
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* @discusstion This method will be called on main thread.
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*/
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- (ASScrollDirection)scrollableDirections;
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/**
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* @abstract Returns any additional information needed for a coming layout pass (@see @c -calculateLayoutWithContext:) with the given elements.
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*
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* @param elements The elements to be laid out later.
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*
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* @discussion The returned object must support equality and hashing (i.e `-isEqual:` and `-hash` must be properly implemented).
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* It should contain all the information needed for the layout pass to perform. It will be available in the context parameter in +calculateLayoutWithContext:
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*
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* This method will be called on main thread.
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*/
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- (nullable id)additionalInfoForLayoutWithElements:(ASElementMap *)elements;
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/**
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* @abstract Prepares and returns a new layout for given context.
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*
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* @param context A context that contains all elements to be laid out and any additional information needed.
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*
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* @return The new layout calculated for the given context.
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*
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* @discussion This method is called ahead of time, i.e before the underlying collection/table view is aware of the provided elements.
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* As a result, clients must solely rely on the given context and should not reach out to other objects for information not available in the context.
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*
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* This method can be called on background theads. It must be thread-safe and should not change any internal state of this delegate.
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* It must block the calling thread but can dispatch to other theads to reduce total blocking time.
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*/
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+ (ASCollectionLayoutState *)calculateLayoutWithContext:(ASCollectionLayoutContext *)context;
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@end
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NS_ASSUME_NONNULL_END
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