TextureGroup · Adlai-Holler · Oct 10, 2018 · Jul 16, 2017 · Sep 6, 2017 · Oct 4, 2017
diff --git a/AsyncDisplayKit.xcodeproj/project.pbxproj b/AsyncDisplayKit.xcodeproj/project.pbxproj
diff --git a/Source/ASCollectionNode.mm b/Source/ASCollectionNode.mm
@@ -62,7 +62,7 @@ - (instancetype)init
   self = [super init];
   if (self) {
     _rangeMode = ASLayoutRangeModeUnspecified;
-    _tuningParameters = std::vector<std::vector<ASRangeTuningParameters>> (ASLayoutRangeModeCount, std::vector<ASRangeTuningParameters> (ASLayoutRangeTypeCount, ASRangeTuningParametersZero));
+    _tuningParameters = [ASAbstractLayoutController defaultTuningParameters];
     _allowsSelection = YES;
     _allowsMultipleSelection = NO;
     _inverted = NO;
@@ -220,11 +220,9 @@ - (void)didLoad
       let tuningParametersVectorRangeModeSize = tuningparametersRangeModeVector.size();
       for (NSInteger rangeType = 0; rangeType < tuningParametersVectorRangeModeSize; rangeType++) {
         ASRangeTuningParameters tuningParameters = tuningparametersRangeModeVector[rangeType];
-        if (!ASRangeTuningParametersEqualToRangeTuningParameters(tuningParameters, ASRangeTuningParametersZero)) {
-          [_rangeController setTuningParameters:tuningParameters
-                                   forRangeMode:(ASLayoutRangeMode)rangeMode
-                                      rangeType:(ASLayoutRangeType)rangeType];
-        }
+        [_rangeController setTuningParameters:tuningParameters
+                                 forRangeMode:(ASLayoutRangeMode)rangeMode
+                                    rangeType:(ASLayoutRangeType)rangeType];
       }
     }
 

diff --git a/Source/ASTableNode.mm b/Source/ASTableNode.mm
@@ -54,7 +54,7 @@ - (instancetype)init
   self = [super init];
   if (self) {
     _rangeMode = ASLayoutRangeModeUnspecified;
-    _tuningParameters = std::vector<std::vector<ASRangeTuningParameters>> (ASLayoutRangeModeCount, std::vector<ASRangeTuningParameters> (ASLayoutRangeTypeCount, ASRangeTuningParametersZero));
+    _tuningParameters = [ASAbstractLayoutController defaultTuningParameters];
     _allowsSelection = YES;
     _allowsSelectionDuringEditing = NO;
     _allowsMultipleSelection = NO;

diff --git a/Source/Debug/AsyncDisplayKit+Debug.m → Source/Debug/AsyncDisplayKit+Debug.mm b/Source/Debug/AsyncDisplayKit+Debug.m → Source/Debug/AsyncDisplayKit+Debug.mm
diff --git a/Source/Debug/AsyncDisplayKit+Tips.m → Source/Debug/AsyncDisplayKit+Tips.mm b/Source/Debug/AsyncDisplayKit+Tips.m → Source/Debug/AsyncDisplayKit+Tips.mm
diff --git a/Source/Details/ASAbstractLayoutController.h b/Source/Details/ASAbstractLayoutController.h
@@ -10,6 +10,8 @@
 #import <AsyncDisplayKit/ASLayoutController.h>
 #import <AsyncDisplayKit/ASBaseDefines.h>
 
+#include <vector>
+
 NS_ASSUME_NONNULL_BEGIN
 
 AS_EXTERN ASDirectionalScreenfulBuffer ASDirectionalScreenfulBufferHorizontal(ASScrollDirection scrollDirection, ASRangeTuningParameters rangeTuningParameters);
@@ -20,6 +22,8 @@ AS_EXTERN CGRect CGRectExpandToRangeWithScrollableDirections(CGRect rect, ASRang
 
 @interface ASAbstractLayoutController : NSObject <ASLayoutController>
 
++ (std::vector<std::vector<ASRangeTuningParameters>>)defaultTuningParameters;
+
 @end
 
 @interface ASAbstractLayoutController (Unavailable)

diff --git a/Source/Details/ASAbstractLayoutController.mm b/Source/Details/ASAbstractLayoutController.mm
@@ -11,8 +11,6 @@
 
 #import <AsyncDisplayKit/ASAssert.h>
 
-#include <vector>
-
 ASRangeTuningParameters const ASRangeTuningParametersZero = {};
 
 BOOL ASRangeTuningParametersEqualToRangeTuningParameters(ASRangeTuningParameters lhs, ASRangeTuningParameters rhs)
@@ -89,53 +87,60 @@ @interface ASAbstractLayoutController () {
 
 @implementation ASAbstractLayoutController
 
-- (instancetype)init
++ (std::vector<std::vector<ASRangeTuningParameters>>)defaultTuningParameters
 {
-  if (!(self = [super init])) {
-    return nil;
-  }
-  ASDisplayNodeAssert(self.class != [ASAbstractLayoutController class], @"Should never create instances of abstract class ASAbstractLayoutController.");
-
-  _tuningParameters = std::vector<std::vector<ASRangeTuningParameters>> (ASLayoutRangeModeCount, std::vector<ASRangeTuningParameters> (ASLayoutRangeTypeCount));
-
-  _tuningParameters[ASLayoutRangeModeFull][ASLayoutRangeTypeDisplay] = {
+  var tuningParameters = std::vector<std::vector<ASRangeTuningParameters>> (ASLayoutRangeModeCount, std::vector<ASRangeTuningParameters> (ASLayoutRangeTypeCount));
+
+  tuningParameters[ASLayoutRangeModeFull][ASLayoutRangeTypeDisplay] = {
     .leadingBufferScreenfuls = 1.0,
     .trailingBufferScreenfuls = 0.5
   };
-  _tuningParameters[ASLayoutRangeModeFull][ASLayoutRangeTypePreload] = {
+
+  tuningParameters[ASLayoutRangeModeFull][ASLayoutRangeTypePreload] = {
     .leadingBufferScreenfuls = 2.5,
     .trailingBufferScreenfuls = 1.5
   };
-  
-  _tuningParameters[ASLayoutRangeModeMinimum][ASLayoutRangeTypeDisplay] = {
+
+  tuningParameters[ASLayoutRangeModeMinimum][ASLayoutRangeTypeDisplay] = {
     .leadingBufferScreenfuls = 0.25,
     .trailingBufferScreenfuls = 0.25
   };
-  _tuningParameters[ASLayoutRangeModeMinimum][ASLayoutRangeTypePreload] = {
+  tuningParameters[ASLayoutRangeModeMinimum][ASLayoutRangeTypePreload] = {
     .leadingBufferScreenfuls = 0.5,
     .trailingBufferScreenfuls = 0.25
   };
 
-  _tuningParameters[ASLayoutRangeModeVisibleOnly][ASLayoutRangeTypeDisplay] = {
+  tuningParameters[ASLayoutRangeModeVisibleOnly][ASLayoutRangeTypeDisplay] = {
     .leadingBufferScreenfuls = 0,
     .trailingBufferScreenfuls = 0
   };
-  _tuningParameters[ASLayoutRangeModeVisibleOnly][ASLayoutRangeTypePreload] = {
+  tuningParameters[ASLayoutRangeModeVisibleOnly][ASLayoutRangeTypePreload] = {
     .leadingBufferScreenfuls = 0,
     .trailingBufferScreenfuls = 0
   };
-  
+
   // The Low Memory range mode has special handling. Because a zero range still includes the visible area / bounds,
   // in order to implement the behavior of releasing all graphics memory (backing stores), ASRangeController must check
   // for this range mode and use an empty set for displayIndexPaths rather than querying the ASLayoutController for the indexPaths.
-  _tuningParameters[ASLayoutRangeModeLowMemory][ASLayoutRangeTypeDisplay] = {
+  tuningParameters[ASLayoutRangeModeLowMemory][ASLayoutRangeTypeDisplay] = {
     .leadingBufferScreenfuls = 0,
     .trailingBufferScreenfuls = 0
   };
-  _tuningParameters[ASLayoutRangeModeLowMemory][ASLayoutRangeTypePreload] = {
+  tuningParameters[ASLayoutRangeModeLowMemory][ASLayoutRangeTypePreload] = {
     .leadingBufferScreenfuls = 0,
     .trailingBufferScreenfuls = 0
   };
+  return tuningParameters;
+}
+
+- (instancetype)init
+{
+  if (!(self = [super init])) {
+    return nil;
+  }
+  ASDisplayNodeAssert(self.class != [ASAbstractLayoutController class], @"Should never create instances of abstract class ASAbstractLayoutController.");
+
+  _tuningParameters = [[self class] defaultTuningParameters];
 
   return self;
 }

diff --git a/...etails/ASCollectionViewLayoutController.m → ...tails/ASCollectionViewLayoutController.mm b/...etails/ASCollectionViewLayoutController.m → ...tails/ASCollectionViewLayoutController.mm
@@ -21,7 +21,6 @@
 };
 typedef struct ASRangeGeometry ASRangeGeometry;
 
-
 #pragma mark -
 #pragma mark ASCollectionViewLayoutController
 

diff --git a/Source/Details/ASTableLayoutController.m → Source/Details/ASTableLayoutController.mm b/Source/Details/ASTableLayoutController.m → Source/Details/ASTableLayoutController.mm