[Yoga] Implement ASYogaLayoutSpec, a simplified integration strategy for Yoga.

AsyncDisplayKit.xcodeproj/project.pbxproj

@@ -180,6 +180,10 @@
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@@ -676,6 +680,10 @@
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@@ -1481,6 +1489,10 @@
 				9C49C36E1B853957000B0DD5 /* ASStackLayoutElement.h */,
 				ACF6ED161B17843500DA7C62 /* ASStackLayoutSpec.h */,
 				ACF6ED171B17843500DA7C62 /* ASStackLayoutSpec.mm */,
+				9019FBB91ED8061D00C45F72 /* ASYogaLayoutSpec.h */,
+				9019FBBA1ED8061D00C45F72 /* ASYogaLayoutSpec.mm */,
+				9019FBBB1ED8061D00C45F72 /* ASYogaUtilities.h */,
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 			);
 			path = Layout;
 			sourceTree = "<group>";
@@ -1643,6 +1655,7 @@
 				B35062571B010F070018CF92 /* ASAssert.h in Headers */,
 				CCBBBF5D1EB161760069AA91 /* ASRangeManagingNode.h in Headers */,
 				B35062581B010F070018CF92 /* ASAvailability.h in Headers */,
+				9019FBBF1ED8061D00C45F72 /* ASYogaUtilities.h in Headers */,
 				DE84918D1C8FFF2B003D89E9 /* ASRunLoopQueue.h in Headers */,
 				CC0F88621E4281E200576FED /* ASSectionController.h in Headers */,
 				A2763D7A1CBDD57D00A9ADBD /* ASPINRemoteImageDownloader.h in Headers */,
@@ -1751,6 +1764,7 @@
 				CCF18FF41D2575E300DF5895 /* NSIndexSet+ASHelpers.h in Headers */,
 				83A7D95C1D44548100BF333E /* ASWeakMap.h in Headers */,
 				E5711A2C1C840C81009619D4 /* ASCollectionElement.h in Headers */,
+				9019FBBD1ED8061D00C45F72 /* ASYogaLayoutSpec.h in Headers */,
 				6947B0BE1E36B4E30007C478 /* ASStackUnpositionedLayout.h in Headers */,
 				CC4C2A771D88E3BF0039ACAB /* ASTraceEvent.h in Headers */,
 				254C6B7B1BF94DF4003EC431 /* ASTextKitRenderer+Positioning.h in Headers */,
@@ -2086,6 +2100,7 @@
 				AC026B721BD57DBF00BBC17E /* _ASHierarchyChangeSet.mm in Sources */,
 				B35062421B010EFD0018CF92 /* _ASAsyncTransactionGroup.m in Sources */,
 				CCA282BD1E9EABDD0037E8B7 /* ASTipProvider.m in Sources */,
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 				B350624A1B010EFD0018CF92 /* _ASCoreAnimationExtras.mm in Sources */,
 				68EE0DC01C1B4ED300BA1B99 /* ASMainSerialQueue.mm in Sources */,
 				B35062101B010EFD0018CF92 /* _ASDisplayLayer.mm in Sources */,
@@ -2167,6 +2182,7 @@
 				6907C25A1DC4ECFE00374C66 /* ASObjectDescriptionHelpers.m in Sources */,
 				B35062051B010EFD0018CF92 /* ASMultiplexImageNode.mm in Sources */,
 				B35062251B010EFD0018CF92 /* ASMutableAttributedStringBuilder.m in Sources */,
+				9019FBBE1ED8061D00C45F72 /* ASYogaLayoutSpec.mm in Sources */,
 				B35062071B010EFD0018CF92 /* ASNetworkImageNode.mm in Sources */,
 				34EFC76D1B701CF100AD841F /* ASOverlayLayoutSpec.mm in Sources */,
 				044285101BAA64EC00D16268 /* ASTwoDimensionalArrayUtils.m in Sources */,

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## master
 
 * Add your own contributions to the next release on the line below this with your name.
+- [Yoga] Implement ASYogaLayoutSpec, a simplified integration strategy for Yoga-powered layout calculation. [Scott Goodson](https://github.com/appleguy)
 - Fixed an issue where calls to setNeedsDisplay and setNeedsLayout would stop working on loaded nodes. [Garrett Moon](https://github.com/garrettmoon)
 - [ASTextKitFontSizeAdjuster] [Ricky Cancro] Replace use of NSAttributedString's boundingRectWithSize:options:context: with NSLayoutManager's boundingRectForGlyphRange:inTextContainer:
 - Add support for IGListKit post-removal-of-IGListSectionType, in preparation for IGListKit 3.0.0 release. [Adlai Holler](https://github.com/Adlai-Holler) [#49](https://github.com/TextureGroup/Texture/pull/49)

Source/ASDisplayNode+Beta.h

@@ -171,15 +171,18 @@ extern void ASDisplayNodePerformBlockOnEveryYogaChild(ASDisplayNode * _Nullable
 @interface ASDisplayNode (Yoga)
 
 @property (nonatomic, strong, nullable) NSArray *yogaChildren;
-@property (nonatomic, strong, nullable) ASLayout *yogaCalculatedLayout;
 
 - (void)addYogaChild:(ASDisplayNode *)child;
 - (void)removeYogaChild:(ASDisplayNode *)child;
 
+- (void)semanticContentAttributeDidChange:(UISemanticContentAttribute)attribute;
+
+#if YOGA_TREE_CONTIGUOUS
+@property (nonatomic, strong, nullable) ASLayout *yogaCalculatedLayout;
 // These methods should not normally be called directly.
 - (void)invalidateCalculatedYogaLayout;
 - (void)calculateLayoutFromYogaRoot:(ASSizeRange)rootConstrainedSize;
-- (void)semanticContentAttributeDidChange:(UISemanticContentAttribute)attribute;
+#endif
 
 @end