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41 lines
1.4 KiB
Objective-C
41 lines
1.4 KiB
Objective-C
/*
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* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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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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*/
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#import <Foundation/Foundation.h>
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@class ASLayoutSpec;
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@class ASLayoutOptions;
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@protocol ASLayoutable;
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@protocol ASLayoutablePrivate <NSObject>
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/**
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* @abstract A display node cannot implement both calculateSizeThatFits: and layoutSpecThatFits:. This
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* method exists to give the user a chance to wrap an ASLayoutable in an ASLayoutSpec just before it is
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* added to a parent ASLayoutSpec. For example, if you wanted an ASTextNode that was always inside of an
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* ASInsetLayoutSpec, you could subclass ASTextNode and implement finalLayoutable so that it wraps
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* self in an inset spec.
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*
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* Note that any ASLayoutable other than self that is returned MUST set isFinalLayoutable to YES BEFORE
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* adding a child.
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*
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* @return The layoutable that will be added to the parent layout spec. Defaults to self.
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*/
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- (id<ASLayoutable>)finalLayoutable;
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/**
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* A flag to indicate that this ASLayoutable was created in finalLayoutable. This MUST be set to YES
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* before adding a child to this layoutable.
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*/
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@property (nonatomic, assign) BOOL isFinalLayoutable;
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@property (nonatomic, strong, readonly) ASLayoutOptions *layoutOptions;
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@end
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