Swiftgram/Source/Private/ASCollectionLayout.h
appleguy 465abb1ded [License] Simplify the Texture license to be pure Apache 2 (removing ASDK-Licenses). (#1077)
* [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.
2018-08-28 07:39:18 -07:00

51 lines
1.8 KiB
Objective-C

//
// ASCollectionLayout.h
// Texture
//
// Copyright (c) Pinterest, Inc. All rights reserved.
// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
//
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import <AsyncDisplayKit/ASBaseDefines.h>
@protocol ASCollectionLayoutDelegate;
@class ASElementMap, ASCollectionLayout, ASCollectionNode;
NS_ASSUME_NONNULL_BEGIN
AS_SUBCLASSING_RESTRICTED
@interface ASCollectionLayout : UICollectionViewLayout
/**
* The collection node object currently using this layout object.
*
* @discussion The collection node object sets the value of this property when a new layout object is assigned to it.
*
* @discussion To get the truth on the current state of the collection, call methods on the collection node or the data source rather than the collection view because:
* 1. The view might not yet be allocated.
* 2. The collection node and data source are thread-safe.
*/
@property (nonatomic, weak) ASCollectionNode *collectionNode;
@property (nonatomic, readonly) id<ASCollectionLayoutDelegate> layoutDelegate;
/**
* Initializes with a layout delegate.
*
* @discussion For developers' convenience, the delegate is retained by this layout object, similar to UICollectionView retains its UICollectionViewLayout object.
*
* @discussion For simplicity, the delegate is read-only. If a new layout delegate is needed, construct a new layout object with that delegate and notify ASCollectionView about it.
* This ensures the underlying UICollectionView purges its cache and properly loads the new layout.
*/
- (instancetype)initWithLayoutDelegate:(id<ASCollectionLayoutDelegate>)layoutDelegate NS_DESIGNATED_INITIALIZER;
- (instancetype)init __unavailable;
- (instancetype)initWithCoder:(NSCoder *)aDecoder __unavailable;
@end
NS_ASSUME_NONNULL_END