mirror of
https://github.com/Swiftgram/Telegram-iOS.git
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64e2323a4e
- ASLayoutNode no longer has 'size' constraint during its initialization.. - ASLayoutNode no longer needs parentSize to calculate its layout.
134 lines
4.1 KiB
Plaintext
134 lines
4.1 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 "ASStackLayoutNode.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 "ASLayoutNodeUtilities.h"
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#import "ASLayoutNodeSubclass.h"
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#import "ASStackLayoutNodeUtilities.h"
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#import "ASStackPositionedLayout.h"
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#import "ASStackUnpositionedLayout.h"
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@implementation ASMutableStackLayoutNodeChild
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@synthesize node, spacingBefore, spacingAfter, flexGrow, flexShrink, flexBasis, alignSelf;
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@end
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@implementation ASStackLayoutNodeChild
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- (instancetype)initWithNode:(ASLayoutNode *)node
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spacingBefore:(CGFloat)spacingBefore
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spacingAfter:(CGFloat)spacingAfter
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flexGrow:(BOOL)flexGrow
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flexShrink:(BOOL)flexShrink
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flexBasis:(ASRelativeDimension)flexBasis
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alignSelf:(ASStackLayoutAlignSelf)alignSelf
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{
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if (node == nil)
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return nil;
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if (self = [super init]) {
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_node = node;
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_spacingBefore = spacingBefore;
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_spacingAfter = spacingAfter;
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_flexGrow = flexGrow;
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_flexShrink = flexShrink;
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_flexBasis = flexBasis;
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_alignSelf = alignSelf;
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}
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return self;
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}
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- (id)copyWithZone:(NSZone *)zone
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{
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if ([self isKindOfClass:[ASMutableStackLayoutNodeChild class]]) {
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return [[ASStackLayoutNodeChild alloc] initWithNode:self.node
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spacingBefore:self.spacingBefore
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spacingAfter:self.spacingAfter
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flexGrow:self.flexGrow
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flexShrink:self.flexShrink
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flexBasis:self.flexBasis
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alignSelf:self.alignSelf];
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} else {
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return self;
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}
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}
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- (id)mutableCopyWithZone:(NSZone *)zone
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{
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ASMutableStackLayoutNodeChild *mutableChild = [[ASMutableStackLayoutNodeChild alloc] init];
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mutableChild.node = self.node;
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mutableChild.spacingBefore = self.spacingBefore;
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mutableChild.spacingAfter = self.spacingAfter;
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mutableChild.flexGrow = self.flexGrow;
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mutableChild.flexShrink = self.flexShrink;
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mutableChild.flexBasis = self.flexBasis;
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mutableChild.alignSelf = self.alignSelf;
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return mutableChild;
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}
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+ (instancetype)newWithInitializer:(void (^)(ASMutableStackLayoutNodeChild *))initializer
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{
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ASStackLayoutNodeChild *c = [super new];
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if (c && initializer) {
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ASMutableStackLayoutNodeChild *mutableChild = [[ASMutableStackLayoutNodeChild alloc] init];
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initializer(mutableChild);
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c = [mutableChild copy];
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}
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return c;
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}
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@end
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@implementation ASStackLayoutNode
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{
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ASStackLayoutNodeStyle _style;
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std::vector<ASStackLayoutNodeChild *> _children;
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}
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+ (instancetype)newWithStyle:(ASStackLayoutNodeStyle)style children:(NSArray *)children
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{
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ASStackLayoutNode *n = [super new];
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if (n) {
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n->_style = style;
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n->_children = std::vector<ASStackLayoutNodeChild *>();
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for (ASStackLayoutNodeChild *child in children) {
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if (child.node != nil) {
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n->_children.push_back(child);
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}
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}
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}
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return n;
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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 *)computeLayoutThatFits:(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 *children = [NSArray arrayWithObjects:&positionedLayout.children[0] count:positionedLayout.children.size()];
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return [ASLayout newWithNode:self
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size:ASSizeRangeClamp(constrainedSize, finalSize)
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children:children];
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}
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@end
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