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50 lines
1.8 KiB
Objective-C
50 lines
1.8 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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typedef NS_ENUM(NSUInteger, ASStackTextLayoutBaselineAlignment) {
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/** No baseline alignment. This is only valid for a vertical stack */
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ASStackTextLayoutBaselineAlignmentNone,
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/** Align all children to the first baseline. This is only valid for a horizontal stack */
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ASStackTextLayoutBaselineAlignmentFirst,
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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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ASStackTextLayoutBaselineAlignmentLast,
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};
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typedef struct {
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/** Describes how the stack will be laid out */
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ASStackLayoutSpecStyle stackLayoutStyle;
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/** The type of baseline alignment */
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ASStackTextLayoutBaselineAlignment baselineAlignment;
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} ASStackTextLayoutSpecStyle;
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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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ASStackTextLayoutable 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 ASStackTextLayoutSpec : ASLayoutSpec <ASStackTextLayoutable>
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/**
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@param style Specifies how children are laid out.
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@param children ASTextLayoutable children to be positioned.
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*/
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+ (instancetype)newWithStyle:(ASStackTextLayoutSpecStyle)style children:(NSArray *)children;
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@end
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