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95 lines
2.5 KiB
Objective-C
95 lines
2.5 KiB
Objective-C
//
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// ASLayoutTransition.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 <UIKit/UIKit.h>
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#import <AsyncDisplayKit/ASDimension.h>
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#import <AsyncDisplayKit/_ASTransitionContext.h>
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#import "ASDisplayNodeLayout.h"
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#import <AsyncDisplayKit/ASBaseDefines.h>
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#import <AsyncDisplayKit/ASDisplayNode.h>
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#import <AsyncDisplayKit/ASLayoutSpec.h>
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NS_ASSUME_NONNULL_BEGIN
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#pragma mark - ASLayoutElementTransition
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/**
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* Objects conform to this project returns if it's possible to layout asynchronous
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*/
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@protocol ASLayoutElementTransition <NSObject>
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/**
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* @abstract Returns if the layoutElement can be used to layout in an asynchronous way on a background thread.
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*/
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@property (nonatomic, readonly) BOOL canLayoutAsynchronous;
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@end
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@interface ASDisplayNode () <ASLayoutElementTransition>
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@end
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@interface ASLayoutSpec () <ASLayoutElementTransition>
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@end
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#pragma mark - ASLayoutTransition
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AS_SUBCLASSING_RESTRICTED
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@interface ASLayoutTransition : NSObject <_ASTransitionContextLayoutDelegate>
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/**
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* Node to apply layout transition on
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*/
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@property (nonatomic, weak, readonly) ASDisplayNode *node;
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/**
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* Previous layout to transition from
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*/
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@property (nonatomic, readonly) const ASDisplayNodeLayout &previousLayout NS_RETURNS_INNER_POINTER;
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/**
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* Pending layout to transition to
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*/
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@property (nonatomic, readonly) const ASDisplayNodeLayout &pendingLayout NS_RETURNS_INNER_POINTER;
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/**
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* Returns if the layout transition needs to happen synchronously
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*/
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@property (nonatomic, readonly) BOOL isSynchronous;
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/**
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* Returns a newly initialized layout transition
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*/
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- (instancetype)initWithNode:(ASDisplayNode *)node
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pendingLayout:(const ASDisplayNodeLayout &)pendingLayout
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previousLayout:(const ASDisplayNodeLayout &)previousLayout NS_DESIGNATED_INITIALIZER;
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/**
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* Insert and remove subnodes that were added or removed between the previousLayout and the pendingLayout
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*/
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- (void)commitTransition;
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/**
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* Insert all new subnodes that were added and move the subnodes that moved between the previous layout and
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* the pending layout.
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*/
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- (void)applySubnodeInsertionsAndMoves;
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/**
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* Remove all subnodes that are removed between the previous layout and the pending layout
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*/
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- (void)applySubnodeRemovals;
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- (instancetype)init NS_UNAVAILABLE;
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- (instancetype)new NS_UNAVAILABLE;
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@end
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NS_ASSUME_NONNULL_END
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