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67 lines
2.0 KiB
Plaintext
67 lines
2.0 KiB
Plaintext
/*
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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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#import <numeric>
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#import <vector>
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#import "ASBaseDefines.h"
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#import "ASInternalHelpers.h"
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#import "ASLayoutSpecUtilities.h"
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#import "ASStackLayoutSpecUtilities.h"
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#import "ASStackPositionedLayout.h"
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#import "ASStackUnpositionedLayout.h"
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#import "ASThread.h"
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@implementation ASStackLayoutSpec
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{
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ASStackLayoutSpecStyle _style;
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std::vector<id<ASLayoutable>> _children;
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ASDN::RecursiveMutex _propertyLock;
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}
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+ (instancetype)newWithStyle:(ASStackLayoutSpecStyle)style children:(NSArray *)children
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{
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ASStackLayoutSpec *spec = [super new];
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if (spec) {
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spec->_style = style;
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spec->_children = std::vector<id<ASLayoutable>>();
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for (id<ASLayoutable> child in children) {
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spec->_children.push_back(child);
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}
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}
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return spec;
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}
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+ (instancetype)new
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{
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ASDISPLAYNODE_NOT_DESIGNATED_INITIALIZER();
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}
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- (ASLayout *)measureWithSizeRange:(ASSizeRange)constrainedSize
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{
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const auto unpositionedLayout = ASStackUnpositionedLayout::compute(_children, _style, constrainedSize);
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const auto positionedLayout = ASStackPositionedLayout::compute(unpositionedLayout, _style, constrainedSize);
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const CGSize finalSize = directionSize(_style.direction, unpositionedLayout.stackDimensionSum, positionedLayout.crossSize);
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NSArray *sublayouts = [NSArray arrayWithObjects:&positionedLayout.sublayouts[0] count:positionedLayout.sublayouts.size()];
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ASDN::MutexLocker l(_propertyLock);
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self.ascender = positionedLayout.ascender;
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self.descender = positionedLayout.descender;
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return [ASLayout newWithLayoutableObject:self
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size:ASSizeRangeClamp(constrainedSize, finalSize)
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sublayouts:sublayouts];
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}
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@end
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