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95e787b226
- ASLayoutable requires mutable properties that are used when attached to a stack layout. - Thus, ASLayoutable objects (including ASDisplayNode) can be injected into stack layout directly. - ASStackLayoutNodeChild no longer needed. - Tests and Kitten sample updated.
69 lines
2.2 KiB
Objective-C
69 lines
2.2 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 <AsyncDisplayKit/ASDimension.h>
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#import <AsyncDisplayKit/ASStackLayoutChild.h>
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@class ASLayout;
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@protocol ASLayoutable <NSObject>
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/**
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* @abstract Additional space to place before this object in the stacking direction.
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* Used when attached to a stack layout.
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*/
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@property (nonatomic, readwrite) CGFloat spacingBefore;
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/**
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* @abstract Additional space to place after this object in the stacking direction.
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* Used when attached to a stack layout.
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*/
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@property (nonatomic, readwrite) CGFloat spacingAfter;
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/**
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* @abstract If the sum of childrens' stack dimensions is less than the minimum size, should this object grow?
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* Used when attached to a stack layout.
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*/
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@property (nonatomic, readwrite) BOOL flexGrow;
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/**
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* @abstract If the sum of childrens' stack dimensions is greater than the maximum size, should this object shrink?
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* Used when attached to a stack layout.
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*/
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@property (nonatomic, readwrite) BOOL flexShrink;
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/**
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* @abstract Specifies the initial size in the stack dimension for this object.
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* Default to ASRelativeDimensionUnconstrained.
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* Used when attached to a stack layout.
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*/
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@property (nonatomic, readwrite) ASRelativeDimension flexBasis;
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/**
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* @abstract Orientation of the object along cross axis, overriding alignItems
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* Used when attached to a stack layout.
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*/
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@property (nonatomic, readwrite) ASStackLayoutAlignSelf alignSelf;
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/**
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* @abstract Calculate a layout based on given size range.
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*
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* @param constrainedSize The minimum and maximum sizes the receiver should fit in.
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*
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* @return An ASLayout instance defining the layout of the receiver and its children.
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*
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* @discussion This method is called on a non-main thread. Other expensive work that needs to
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* be done before display can be performed here, and using ivars to cache any valuable intermediate results is
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* encouraged.
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*/
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- (ASLayout *)calculateLayoutThatFits:(ASSizeRange)constrainedSize;
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@end
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