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Added method to ASLayoutable to allow a layoutable to override how it will be added to the layoutSpec.

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Also moved ASStaticLayoutSpec to act more like the other layouts.
This commit is contained in:
rcancro
2015-08-25 14:04:06 -07:00
parent 9c51bde8e8
commit 499adb5145
17 changed files with 191 additions and 169 deletions
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45
AsyncDisplayKit/Layout/ASStackLayoutSpec.mm
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@@ -23,9 +23,6 @@
#import "ASThread.h"
@implementation ASStackLayoutSpec
{
std::vector<id<ASStackLayoutable>> _children;
}
- (instancetype)init
{
@@ -47,26 +44,10 @@
_spacing = spacing;
_justifyContent = justifyContent;
_children = std::vector<id<ASStackLayoutable>>();
for (id<ASStackLayoutable> child in children) {
_children.push_back(child);
}
[self setChildren:children];
return self;
}
- (void)addChild:(id<ASStackLayoutable>)child
{
ASDisplayNodeAssert(self.isMutable, @"Cannot set properties when layout spec is not mutable");
_children.push_back(child);
}
- (void)addChildren:(NSArray *)children
{
for (id<ASStackLayoutable> child in children) {
[self addChild:child];
}
}
- (void)setDirection:(ASStackLayoutDirection)direction
{
ASDisplayNodeAssert(self.isMutable, @"Cannot set properties when layout spec is not mutable");
@@ -91,10 +72,32 @@
_spacing = spacing;
}
- (void)setChildren:(NSArray *)children
{
[super setChildren:children];
#if DEBUG
for (id<ASStackLayoutable> child in children) {
ASDisplayNodeAssert(([child finalLayoutable] == child && [child conformsToProtocol:@protocol(ASStackLayoutable)]) || ([child finalLayoutable] != child && [[child finalLayoutable] conformsToProtocol:@protocol(ASStackLayoutable)]), @"child must conform to ASBaselineLayoutable");
}
#endif
}
- (void)setChild:(id<ASLayoutable>)child forIdentifier:(NSString *)identifier
{
ASDisplayNodeAssert(NO, @"ASStackLayoutSpec only supports setChildren");
}
- (ASLayout *)measureWithSizeRange:(ASSizeRange)constrainedSize
{
ASStackLayoutSpecStyle style = {.direction = _direction, .spacing = _spacing, .justifyContent = _justifyContent, .alignItems = _alignItems};
const auto unpositionedLayout = ASStackUnpositionedLayout::compute(_children, style, constrainedSize);
std::vector<id<ASStackLayoutable>> stackChildren = std::vector<id<ASStackLayoutable>>();
for (id<ASStackLayoutable> child in self.children) {
NSAssert([child conformsToProtocol:@protocol(ASStackLayoutable)], @"Child must implement ASStackLayoutable");
stackChildren.push_back(child);
}
const auto unpositionedLayout = ASStackUnpositionedLayout::compute(stackChildren, style, constrainedSize);
const auto positionedLayout = ASStackPositionedLayout::compute(unpositionedLayout, style, constrainedSize);
const CGSize finalSize = directionSize(style.direction, unpositionedLayout.stackDimensionSum, positionedLayout.crossSize);
NSArray *sublayouts = [NSArray arrayWithObjects:&positionedLayout.sublayouts[0] count:positionedLayout.sublayouts.size()];