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eaa875c7f2
* Improve designated initializer usage * Some more changes * Add some whitespace * Fix some warning
101 lines
2.6 KiB
Objective-C
101 lines
2.6 KiB
Objective-C
//
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// ASLayoutTransition.h
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// AsyncDisplayKit
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//
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// Created by Huy Nguyen on 3/8/16.
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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 <AsyncDisplayKit/ASDimension.h>
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#import <AsyncDisplayKit/_ASTransitionContext.h>
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#import <AsyncDisplayKit/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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#import <memory>
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NS_ASSUME_NONNULL_BEGIN
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#pragma mark - ASLayoutElementTransition
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/**
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* Extend the layout element protocol to check if a the element can layout asynchronously.
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*/
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@protocol ASLayoutElementTransition <ASLayoutElement>
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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, assign, 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, readonly, weak) 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, assign) std::shared_ptr<ASDisplayNodeLayout> previousLayout;
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/**
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* Pending layout to transition to
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*/
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@property (nonatomic, readonly, assign) std::shared_ptr<ASDisplayNodeLayout> pendingLayout;
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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, assign) 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:(std::shared_ptr<ASDisplayNodeLayout>)pendingLayout
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previousLayout:(std::shared_ptr<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 between the previous layout and the pending layout
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*/
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- (void)applySubnodeInsertions;
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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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@end
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@interface ASLayoutTransition (Unavailable)
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- (instancetype)init NS_UNAVAILABLE;
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@end
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NS_ASSUME_NONNULL_END
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