From 85394f09b42d841fade0d56a80b36c2282e9128e Mon Sep 17 00:00:00 2001
From: Samuel Hsiung <hsiung@gmail.com>
Date: Fri, 4 Mar 2016 21:33:08 -0800
Subject: [PATCH] Account for alwaysBounce(Vertical|Horizontal) when
 calculating scrollable directions

---
 AsyncDisplayKit/ASCollectionView.mm | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/AsyncDisplayKit/ASCollectionView.mm b/AsyncDisplayKit/ASCollectionView.mm
index 27f2026335..925c189e9d 100644
--- a/AsyncDisplayKit/ASCollectionView.mm
+++ b/AsyncDisplayKit/ASCollectionView.mm
@@ -637,10 +637,13 @@ static NSString * const kCellReuseIdentifier = @"_ASCollectionViewCell";
 - (ASScrollDirection)nonFlowLayoutScrollableDirections
 {
   ASScrollDirection scrollableDirection = ASScrollDirectionNone;
-  if (self.contentSize.width + self.contentInset.left + self.contentInset.right > self.bounds.size.width) { // Can scroll horizontally.
+  CGFloat totalContentWidth = self.contentSize.width + self.contentInset.left + self.contentInset.right;
+  CGFloat totalContentHeight = self.contentSize.height + self.contentInset.top + self.contentInset.bottom;
+  
+  if (self.alwaysBounceHorizontal || totalContentWidth > self.bounds.size.width) { // Can scroll horizontally.
     scrollableDirection |= ASScrollDirectionHorizontalDirections;
   }
-  if (self.contentSize.height + self.contentInset.top + self.contentInset.bottom > self.bounds.size.height) { // Can scroll vertically.
+  if (self.alwaysBounceVertical || totalContentHeight > self.bounds.size.height) { // Can scroll vertically.
     scrollableDirection |= ASScrollDirectionVerticalDirections;
   }
   return scrollableDirection;