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https://github.com/Swiftgram/Telegram-iOS.git
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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.
71 lines
2.5 KiB
Objective-C
71 lines
2.5 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 "ASStackLayoutSpec.h"
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typedef struct {
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ASStackLayoutDirection direction;
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CGFloat spacing;
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ASStackLayoutJustifyContent justifyContent;
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ASStackLayoutAlignItems alignItems;
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BOOL baselineRelativeArrangement;
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} ASStackLayoutSpecStyle;
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inline CGFloat stackDimension(const ASStackLayoutDirection direction, const CGSize size)
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{
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return (direction == ASStackLayoutDirectionVertical) ? size.height : size.width;
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}
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inline CGFloat crossDimension(const ASStackLayoutDirection direction, const CGSize size)
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{
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return (direction == ASStackLayoutDirectionVertical) ? size.width : size.height;
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}
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inline BOOL compareCrossDimension(const ASStackLayoutDirection direction, const CGSize a, const CGSize b)
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{
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return crossDimension(direction, a) < crossDimension(direction, b);
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}
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inline CGPoint directionPoint(const ASStackLayoutDirection direction, const CGFloat stack, const CGFloat cross)
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{
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return (direction == ASStackLayoutDirectionVertical) ? CGPointMake(cross, stack) : CGPointMake(stack, cross);
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}
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inline CGSize directionSize(const ASStackLayoutDirection direction, const CGFloat stack, const CGFloat cross)
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{
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return (direction == ASStackLayoutDirectionVertical) ? CGSizeMake(cross, stack) : CGSizeMake(stack, cross);
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}
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inline ASSizeRange directionSizeRange(const ASStackLayoutDirection direction,
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const CGFloat stackMin,
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const CGFloat stackMax,
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const CGFloat crossMin,
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const CGFloat crossMax)
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{
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return {directionSize(direction, stackMin, crossMin), directionSize(direction, stackMax, crossMax)};
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}
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inline ASStackLayoutAlignItems alignment(ASStackLayoutAlignSelf childAlignment, ASStackLayoutAlignItems stackAlignment)
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{
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switch (childAlignment) {
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case ASStackLayoutAlignSelfCenter:
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return ASStackLayoutAlignItemsCenter;
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case ASStackLayoutAlignSelfEnd:
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return ASStackLayoutAlignItemsEnd;
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case ASStackLayoutAlignSelfStart:
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return ASStackLayoutAlignItemsStart;
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case ASStackLayoutAlignSelfStretch:
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return ASStackLayoutAlignItemsStretch;
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case ASStackLayoutAlignSelfAuto:
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default:
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return stackAlignment;
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}
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}
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