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89a216b90d
1) Set the ascender/descender of an ASTextNode when the attributeString is set. Previously ascender/descender were only being computed in `setValuesFromLayoutable` and only when the attribute string was not nil. May make sense to remove the computation from `setValuesFromLayoutable` entirely. 2) Remove ability to allow different children of a stack spec to aling to different baselines. This wasn't working before and I'm not convinced it is possible to do properly/useful enough to invest the time. 3) Have all stack spec run `ASStackBaselinePositionedLayout::compute` to compute the stack's ascender and descender. Even if the stack isn't aligning its children to a baseline, the stack itself may be a child of another stack that IS aligning to a baseline.
70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/*
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* Copyright (c) 2015-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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/** The direction children are stacked in */
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typedef NS_ENUM(NSUInteger, ASStackLayoutDirection) {
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/** Children are stacked vertically */
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ASStackLayoutDirectionVertical,
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/** Children are stacked horizontally */
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ASStackLayoutDirectionHorizontal,
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};
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/** If no children are flexible, how should this spec justify its children in the available space? */
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typedef NS_ENUM(NSUInteger, ASStackLayoutJustifyContent) {
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/**
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On overflow, children overflow out of this spec's bounds on the right/bottom side.
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On underflow, children are left/top-aligned within this spec's bounds.
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*/
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ASStackLayoutJustifyContentStart,
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/**
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On overflow, children are centered and overflow on both sides.
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On underflow, children are centered within this spec's bounds in the stacking direction.
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*/
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ASStackLayoutJustifyContentCenter,
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/**
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On overflow, children overflow out of this spec's bounds on the left/top side.
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On underflow, children are right/bottom-aligned within this spec's bounds.
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*/
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ASStackLayoutJustifyContentEnd,
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};
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/** Orientation of children along cross axis */
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typedef NS_ENUM(NSUInteger, ASStackLayoutAlignItems) {
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/** Align children to start of cross axis */
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ASStackLayoutAlignItemsStart,
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/** Align children with end of cross axis */
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ASStackLayoutAlignItemsEnd,
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/** Center children on cross axis */
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ASStackLayoutAlignItemsCenter,
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/** Expand children to fill cross axis */
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ASStackLayoutAlignItemsStretch,
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/** Children align to their first baseline. Only available for horizontal stack spec */
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ASStackLayoutAlignItemsBaselineFirst,
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/** Children align to their last baseline. Only available for horizontal stack spec */
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ASStackLayoutAlignItemsBaselineLast,
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};
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/**
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Each child may override their parent stack's cross axis alignment.
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@see ASStackLayoutAlignItems
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*/
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typedef NS_ENUM(NSUInteger, ASStackLayoutAlignSelf) {
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/** Inherit alignment value from containing stack. */
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ASStackLayoutAlignSelfAuto,
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/** Align to start of cross axis */
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ASStackLayoutAlignSelfStart,
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/** Align with end of cross axis */
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ASStackLayoutAlignSelfEnd,
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/** Center on cross axis */
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ASStackLayoutAlignSelfCenter,
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/** Expand to fill cross axis */
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ASStackLayoutAlignSelfStretch,
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};
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