Fixed infinite recursion in finalLayoutable, removed child properties from ASLayoutSpecs

AsyncDisplayKit/ASDisplayNode.mm

@@ -1849,8 +1849,9 @@ static void _recursivelySetDisplaySuspended(ASDisplayNode *node, CALayer *layer,
     return !self.layerBacked && [self.view canPerformAction:action withSender:sender];
 }
 
-- (id<ASLayoutable>)finalLayoutable {
+- (ASLayoutSpec *)finalLayoutableWithParent:(ASLayoutSpec *)parentSpec
-  return self;
+{
+  return nil;
 }
 
 @end

AsyncDisplayKit/Layout/ASBackgroundLayoutSpec.h

@@ -15,7 +15,6 @@
  */
 @interface ASBackgroundLayoutSpec : ASLayoutSpec
 
-@property (nonatomic, strong) id<ASLayoutable> child;
 @property (nonatomic, strong) id<ASLayoutable> background;
 
 /**

AsyncDisplayKit/Layout/ASCenterLayoutSpec.h

@@ -39,7 +39,6 @@ typedef NS_OPTIONS(NSUInteger, ASCenterLayoutSpecSizingOptions) {
 
 @property (nonatomic, assign) ASCenterLayoutSpecCenteringOptions centeringOptions;
 @property (nonatomic, assign) ASCenterLayoutSpecSizingOptions sizingOptions;
-@property (nonatomic, strong) id<ASLayoutable> child;
 
 /**
  * Initializer.

AsyncDisplayKit/Layout/ASInsetLayoutSpec.h

@@ -29,7 +29,6 @@
  */
 @interface ASInsetLayoutSpec : ASLayoutSpec
 
-@property (nonatomic, strong) id<ASLayoutable> child;
 @property (nonatomic, assign) UIEdgeInsets insets;
 
 /**

AsyncDisplayKit/Layout/ASLayoutOptionsPrivate.mm

@@ -16,11 +16,18 @@
 - (ASLayoutOptions *)layoutOptions\
 {\
 dispatch_once(&_layoutOptionsInitializeToken, ^{\
+if (_layoutOptions == nil) {\
 _layoutOptions = [[[ASLayoutOptions defaultLayoutOptionsClass] alloc] init];\
+}\
 });\
 return _layoutOptions;\
 }\
 \
+- (void)setLayoutOptions:(ASLayoutOptions *)layoutOptions\
+{\
+  _layoutOptions = layoutOptions;\
+}\
+\
 - (CGFloat)spacingBefore\
 {\
 return self.layoutOptions.spacingBefore;\

AsyncDisplayKit/Layout/ASLayoutSpec.mm

@@ -49,9 +49,9 @@ static NSString * const kDefaultChildrenKey = @"kDefaultChildrenKey";
   return [ASLayout layoutWithLayoutableObject:self size:constrainedSize.min];
 }
 
-- (id<ASLayoutable>)finalLayoutable
+- (ASLayoutSpec *)finalLayoutableWithParent:(ASLayoutSpec *)parentSpec;
 {
-  return self;
+  return nil;
 }
 
 - (void)setChild:(id<ASLayoutable>)child;
@@ -61,14 +61,14 @@ static NSString * const kDefaultChildrenKey = @"kDefaultChildrenKey";
 
 - (id<ASLayoutable>)layoutableToAddFromLayoutable:(id<ASLayoutable>)child
 {
-  ASLayoutOptions *layoutOptions = [ASLayoutSpec layoutOptionsForChild:child];
+  ASLayoutOptions *layoutOptions = [child layoutOptions];
-  id<ASLayoutable> finalLayoutable = [child finalLayoutable];
   layoutOptions.isMutable = NO;
   
-  if (finalLayoutable != child) {
+  id<ASLayoutable> finalLayoutable = [child finalLayoutableWithParent:self];
+  if (finalLayoutable) {
     ASLayoutOptions *finalLayoutOptions = [layoutOptions copy];
     finalLayoutOptions.isMutable = NO;
-    [ASLayoutSpec associateLayoutOptions:finalLayoutOptions withChild:finalLayoutable];
+    finalLayoutable.layoutOptions = finalLayoutOptions;
     return finalLayoutable;
   }
   return child;
@@ -107,35 +107,5 @@ static NSString * const kDefaultChildrenKey = @"kDefaultChildrenKey";
   return self.layoutChildren[kDefaultChildrenKey];
 }
 
-static Class gLayoutOptionsClass = [ASLayoutOptions class];
-+ (void)setLayoutOptionsClass:(Class)layoutOptionsClass
-{
-  gLayoutOptionsClass = layoutOptionsClass;
-}
-
-+ (ASLayoutOptions *)optionsForChild:(id<ASLayoutable>)child
-{
-  ASLayoutOptions *layoutOptions = [[gLayoutOptionsClass alloc] init];;
-  [layoutOptions setValuesFromLayoutable:child];
-  layoutOptions.isMutable = NO;
-  return layoutOptions;
-}
-
-+ (void)associateLayoutOptions:(ASLayoutOptions *)layoutOptions withChild:(id<ASLayoutable>)child
-{
-  objc_setAssociatedObject(child, @selector(setChild:), layoutOptions, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
-}
-
-+ (ASLayoutOptions *)layoutOptionsForChild:(id<ASLayoutable>)child
-{
-  ASLayoutOptions *layoutOptions = objc_getAssociatedObject(child, @selector(setChild:));
-  if (layoutOptions == nil) {
-    layoutOptions = [self optionsForChild:child];
-    [self associateLayoutOptions:layoutOptions withChild:child];
-  }
-  return objc_getAssociatedObject(child, @selector(setChild:));
-}
-
-                     
                      
 @end

AsyncDisplayKit/Layout/ASLayoutablePrivate.h

@@ -14,6 +14,6 @@
 @class ASLayoutOptions;
 
 @protocol ASLayoutablePrivate <NSObject>
-- (ASLayoutSpec *)finalLayoutable;
+- (ASLayoutSpec *)finalLayoutableWithParent:(ASLayoutSpec *)parentSpec;
-@property (nonatomic, strong, readonly) ASLayoutOptions *layoutOptions;
+@property (nonatomic, strong) ASLayoutOptions *layoutOptions;
 @end

AsyncDisplayKit/Layout/ASOverlayLayoutSpec.h

@@ -15,7 +15,6 @@
  */
 @interface ASOverlayLayoutSpec : ASLayoutSpec
 
-@property (nonatomic, strong) id<ASLayoutable> child;
 @property (nonatomic, strong) id<ASLayoutable> overlay;
 
 + (instancetype)overlayLayoutSpecWithChild:(id<ASLayoutable>)child overlay:(id<ASLayoutable>)overlay;

AsyncDisplayKit/Layout/ASOverlayLayoutSpec.mm

@@ -49,7 +49,7 @@ static NSString * const kOverlayChildKey = @"kOverlayChildKey";
  */
 - (ASLayout *)measureWithSizeRange:(ASSizeRange)constrainedSize
 {
-  ASLayout *contentsLayout = [_child measureWithSizeRange:constrainedSize];
+  ASLayout *contentsLayout = [self.child measureWithSizeRange:constrainedSize];
   contentsLayout.position = CGPointZero;
   NSMutableArray *sublayouts = [NSMutableArray arrayWithObject:contentsLayout];
   if (self.overlay) {

AsyncDisplayKit/Layout/ASRatioLayoutSpec.h

@@ -31,8 +31,6 @@
  **/
 @interface ASRatioLayoutSpec : ASLayoutSpec
 
-
-@property (nonatomic, strong) id<ASLayoutable> child;
 @property (nonatomic, assign) CGFloat ratio;
 
 + (instancetype)ratioLayoutSpecWithRatio:(CGFloat)ratio child:(id<ASLayoutable>)child;

AsyncDisplayKit/Private/ASDisplayNodeInternal.h

@@ -154,8 +154,6 @@ typedef NS_OPTIONS(NSUInteger, ASDisplayNodeMethodOverrides) {
 
 @property (nonatomic, assign) CGFloat contentsScaleForDisplay;
 
-- (id<ASLayoutable>)finalLayoutable;
-
 @end
 
 @interface UIView (ASDisplayNodeInternal)