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# Conflicts: # AsyncDisplayKit/Layout/ASLayoutSpec.h # AsyncDisplayKit/Layout/ASStackLayoutSpec.mm
64 lines
2.9 KiB
Objective-C
64 lines
2.9 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/ASStackLayoutSpec.h>
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#import <AsyncDisplayKit/ASBaselineLayoutable.h>
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typedef NS_ENUM(NSUInteger, ASBaselineLayoutBaselineAlignment) {
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/** No baseline alignment. This is only valid for a vertical stack */
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ASBaselineLayoutBaselineAlignmentNone,
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/** Align all children to the first baseline. This is only valid for a horizontal stack */
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ASBaselineLayoutBaselineAlignmentFirst,
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/** Align all children to the last baseline. This is useful when a text node wraps and you want to align
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to the bottom baseline. This is only valid for a horizontal stack */
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ASBaselineLayoutBaselineAlignmentLast,
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};
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/**
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A specialized version of a stack layout that aligns its children on a baseline. This spec only works with
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ASBaselineLayoutable children.
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If the spec is created with a horizontal direction, the children will be laid on a common baseline.
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If the spec is created with a vertical direction, a child's vertical spacing will be measured from its
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baseline instead of from the child's bounding box.
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*/
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@interface ASBaselineLayoutSpec : ASLayoutSpec <ASBaselineLayoutable>
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/** Specifies the direction children are stacked in. */
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@property (nonatomic, assign) ASStackLayoutDirection direction;
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/** The amount of space between each child. */
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@property (nonatomic, assign) CGFloat spacing;
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/** The amount of space between each child. */
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@property (nonatomic, assign) ASStackLayoutJustifyContent justifyContent;
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/** Orientation of children along cross axis */
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@property (nonatomic, assign) ASStackLayoutAlignItems alignItems;
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/** The type of baseline alignment */
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@property (nonatomic, assign) ASBaselineLayoutBaselineAlignment baselineAlignment;
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- (void)addChild:(id<ASBaselineLayoutable>)child;
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- (void)addChildren:(NSArray *)children;
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/**
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@param direction The direction of the stack view (horizontal or vertical)
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@param spacing The spacing between the children
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@param baselineAlignment The baseline to align to
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@param justifyContent If no children are flexible, this describes how to fill any extra space
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@param alignItems Orientation of the children along the cross axis
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@param children ASLayoutable children to be positioned.
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*/
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+ (instancetype)baselineLayoutSpecWithDirection:(ASStackLayoutDirection)direction
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spacing:(CGFloat)spacing
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baselineAlignment:(ASBaselineLayoutBaselineAlignment)baselineAlignment
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justifyContent:(ASStackLayoutJustifyContent)justifyContent
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alignItems:(ASStackLayoutAlignItems)alignItems
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children:(NSArray *)children;
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@end
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