[ASCollectionView] Fix index space translation of Flow Layout Delegate methods.

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## master
 
 * Add your own contributions to the next release on the line below this with your name.
+- [ASCollectionView] Improve index space translation of Flow Layout Delegate methods. [Scott Goodson](https://github.com/appleguy)
 - [ASVideoNode] Fix unreleased time observer. [Flo Vouin](https://github.com/flovouin)
 - [PINCache] Set a default .byteLimit to reduce disk usage and startup time. [#595](https://github.com/TextureGroup/Texture/pull/595) [Scott Goodson](https://github.com/appleguy)
 - [ASNetworkImageNode] Fix deadlock in GIF handling. [#582](https://github.com/TextureGroup/Texture/pull/582) [Garrett Moon](https://github.com/garrettmoon)

Source/ASCollectionNode+Beta.h

@@ -67,6 +67,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (void)endUpdatesAnimated:(BOOL)animated completion:(nullable void (^)(BOOL))completion ASDISPLAYNODE_DEPRECATED_MSG("Use -performBatchUpdates:completion: instead.");
 
+- (void)invalidateFlowLayoutDelegateMetrics;
+
 @end
 
 NS_ASSUME_NONNULL_END

Source/ASCollectionNode.h

@@ -876,6 +876,10 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (void)collectionView:(UICollectionView *)collectionView didEndDisplayingCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath;
 
+- (void)collectionView:(UICollectionView *)collectionView willDisplaySupplementaryView:(UICollectionReusableView *)view forElementKind:(NSString *)elementKind atIndexPath:(NSIndexPath *)indexPath;
+
+- (void)collectionView:(UICollectionView *)collectionView didEndDisplayingSupplementaryView:(UICollectionReusableView *)view forElementOfKind:(NSString *)elementKind atIndexPath:(NSIndexPath *)indexPath;
+
 @end
 
 NS_ASSUME_NONNULL_END

Source/ASCollectionNode.mm

@@ -805,6 +805,13 @@ - (void)endUpdatesAnimated:(BOOL)animated completion:(void (^)(BOOL))completion
   }
 }
 
+- (void)invalidateFlowLayoutDelegateMetrics {
+  ASDisplayNodeAssertMainThread();
+  if (self.nodeLoaded) {
+    [self.view invalidateFlowLayoutDelegateMetrics];
+  }
+}
+
 - (void)insertSections:(NSIndexSet *)sections
 {
   ASDisplayNodeAssertMainThread();

Source/Base/ASAssert.h

@@ -64,8 +64,8 @@
 #define ASDisplayNodeConditionalAssert(shouldTestCondition, condition, desc, ...) ASDisplayNodeAssert((!(shouldTestCondition) || (condition)), desc, ##__VA_ARGS__)
 #define ASDisplayNodeConditionalCAssert(shouldTestCondition, condition, desc, ...) ASDisplayNodeCAssert((!(shouldTestCondition) || (condition)), desc, ##__VA_ARGS__)
 
-#define ASDisplayNodeCAssertPositiveReal(description, num) ASDisplayNodeCAssert(num >= 0 && num <= CGFLOAT_MAX, @"%@ must be a real positive integer.", description)
-#define ASDisplayNodeCAssertInfOrPositiveReal(description, num) ASDisplayNodeCAssert(isinf(num) || (num >= 0 && num <= CGFLOAT_MAX), @"%@ must be infinite or a real positive integer.", description)
+#define ASDisplayNodeCAssertPositiveReal(description, num) ASDisplayNodeCAssert(num >= 0 && num <= CGFLOAT_MAX, @"%@ must be a real positive integer: %f.", description, (CGFloat)num)
+#define ASDisplayNodeCAssertInfOrPositiveReal(description, num) ASDisplayNodeCAssert(isinf(num) || (num >= 0 && num <= CGFLOAT_MAX), @"%@ must be infinite or a real positive integer: %f.", description, (CGFloat)num)
 
 #define ASDisplayNodeErrorDomain @"ASDisplayNodeErrorDomain"
 #define ASDisplayNodeNonFatalErrorCode 1

Source/Details/ASDataController.mm

@@ -791,7 +791,7 @@ - (void)_relayoutAllNodes
       element.constrainedSize = newConstrainedSize;
 
       // Node may not be allocated yet (e.g node virtualization or same size optimization)
-      // Call context.nodeIfAllocated here to avoid immature node allocation and layout
+      // Call context.nodeIfAllocated here to avoid premature node allocation and layout
       ASCellNode *node = element.nodeIfAllocated;
       if (node) {
         [self _layoutNode:node withConstrainedSize:newConstrainedSize];

Source/Private/ASCollectionView+Undeprecated.h

@@ -296,6 +296,11 @@ NS_ASSUME_NONNULL_BEGIN
  */
 - (nullable NSIndexPath *)indexPathForNode:(ASCellNode *)cellNode AS_WARN_UNUSED_RESULT;
 
+/**
+ *  Invalidates and recalculates the cached sizes stored for pass-through cells used in interop mode.
+ */
+- (void)invalidateFlowLayoutDelegateMetrics;
+
 - (void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated;
 
 @end