[Automatic Hierarchy Management] Rename IHM to automatic hierarchy management and move out of beta header (#2066)

* Rename automaticHierarchy to automaticallyManagesSubnodes

* Comment adjustments

AsyncDisplayKit/ASButtonNode.mm

@@ -14,7 +14,6 @@
 #import "ASDisplayNode+Subclasses.h"
 #import "ASBackgroundLayoutSpec.h"
 #import "ASInsetLayoutSpec.h"
-#import "ASDisplayNode+Beta.h"
 #import "ASStaticLayoutSpec.h"
 
 @interface ASButtonNode ()
@@ -56,7 +55,7 @@
 - (instancetype)init
 {
   if (self = [super init]) {
-    self.usesImplicitHierarchyManagement = YES;
+    self.automaticallyManagesSubnodes = YES;
     
     _contentSpacing = 8.0;
     _laysOutHorizontally = YES;

AsyncDisplayKit/ASCollectionView.mm

@@ -18,7 +18,6 @@
 #import "ASCollectionViewFlowLayoutInspector.h"
 #import "ASDisplayNodeExtras.h"
 #import "ASDisplayNode+FrameworkPrivate.h"
-#import "ASDisplayNode+Beta.h"
 #import "ASInternalHelpers.h"
 #import "UICollectionViewLayout+ASConvenience.h"
 #import "ASRangeController.h"

AsyncDisplayKit/ASDisplayNode+Beta.h

@@ -20,9 +20,6 @@ ASDISPLAYNODE_EXTERN_C_END
 
 @interface ASDisplayNode (Beta)
 
-+ (BOOL)usesImplicitHierarchyManagement;
-+ (void)setUsesImplicitHierarchyManagement:(BOOL)enabled;
-
 /**
  * ASTableView and ASCollectionView now throw exceptions on invalid updates
  * like their UIKit counterparts. If YES, these classes will log messages
@@ -63,8 +60,6 @@ ASDISPLAYNODE_EXTERN_C_END
 
 /** @name Layout Transitioning */
 
-@property (nonatomic) BOOL usesImplicitHierarchyManagement;
-
 /**
  * @abstract Currently used by ASNetworkImageNode and ASMultiplexImageNode to allow their placeholders to stay if they are loading an image from the network.
  * Otherwise, a display pass is scheduled and completes, but does not actually draw anything - and ASDisplayNode considers the element finished.

AsyncDisplayKit/ASDisplayNode.h

@@ -813,8 +813,24 @@ NS_ASSUME_NONNULL_BEGIN
 @end
 
 /*
- ASDisplayNode participates in ASAsyncTransactions, so you can determine when your subnodes are done rendering.
- See: -(void)asyncdisplaykit_asyncTransactionContainerStateDidChange in ASDisplayNodeSubclass.h
+ * ASDisplayNode support for automatic subnode management.
+ */
+@interface ASDisplayNode (AutomaticSubnodeManagement)
+
+/**
+ * @abstract A boolean that shows whether the node automatically inserts and removes nodes based on the presence or
+ * absence of the node and its subnodes is completely determined in its layoutSpecThatFits: method.
+ *
+ * @discussion If flag is YES the node no longer require addSubnode: or removeFromSupernode method calls. The presence
+ * or absence of subnodes is completely determined in its layoutSpecThatFits: method.
+ */
+@property (nonatomic, assign) BOOL automaticallyManagesSubnodes;
+
+@end
+
+/*
+ * ASDisplayNode participates in ASAsyncTransactions, so you can determine when your subnodes are done rendering.
+ * See: -(void)asyncdisplaykit_asyncTransactionContainerStateDidChange in ASDisplayNodeSubclass.h
  */
 @interface ASDisplayNode (ASDisplayNodeAsyncTransactionContainer) <ASDisplayNodeAsyncTransactionContainer>
 @end
@@ -829,7 +845,9 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)addSubnode:(nonnull ASDisplayNode *)node;
 @end
 
-/** CALayer(AsyncDisplayKit) defines convenience method for adding sub-ASDisplayNode to a CALayer. */
+/*
+ * CALayer(AsyncDisplayKit) defines convenience method for adding sub-ASDisplayNode to a CALayer.
+ */
 @interface CALayer (AsyncDisplayKit)
 /**
  * Convenience method, equivalent to [layer addSublayer:node.layer].
@@ -890,6 +908,17 @@ NS_ASSUME_NONNULL_BEGIN
  */
 - (void)cancelLayoutTransitionsInProgress ASDISPLAYNODE_DEPRECATED;
 
+/**
+ * @abstract A boolean that shows whether the node automatically inserts and removes nodes based on the presence or
+ * absence of the node and its subnodes is completely determined in its layoutSpecThatFits: method.
+ *
+ * @discussion If flag is YES the node no longer require addSubnode: or removeFromSupernode method calls. The presence
+ * or absence of subnodes is completely determined in its layoutSpecThatFits: method.
+ *
+ * @deprecated Deprecated in version 2.0: Use automaticallyManagesSubnodes
+ */
+@property (nonatomic, assign) BOOL usesImplicitHierarchyManagement ASDISPLAYNODE_DEPRECATED;
+
 - (void)reclaimMemory ASDISPLAYNODE_DEPRECATED;
 - (void)recursivelyReclaimMemory ASDISPLAYNODE_DEPRECATED;
 @property (nonatomic, assign) BOOL placeholderFadesOut ASDISPLAYNODE_DEPRECATED;

AsyncDisplayKit/ASDisplayNode.mm

@@ -77,18 +77,6 @@ NSString * const ASRenderingEngineDidDisplayNodesScheduledBeforeTimestamp = @"AS
 @synthesize isFinalLayoutable = _isFinalLayoutable;
 @synthesize threadSafeBounds = _threadSafeBounds;
 
-static BOOL usesImplicitHierarchyManagement = NO;
-
-+ (BOOL)usesImplicitHierarchyManagement
-{
-  return usesImplicitHierarchyManagement;
-}
-
-+ (void)setUsesImplicitHierarchyManagement:(BOOL)enabled
-{
-  usesImplicitHierarchyManagement = enabled;
-}
-
 static BOOL suppressesInvalidCollectionUpdateExceptions = YES;
 
 + (BOOL)suppressesInvalidCollectionUpdateExceptions
@@ -703,6 +691,20 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c)
   return !self.isNodeLoaded;
 }
 
+#pragma mark - Automatic Hierarchy
+
+- (BOOL)automaticallyManagesSubnodes
+{
+  ASDN::MutexLocker l(__instanceLock__);
+  return _automaticallyManagesSubnodes;
+}
+
+- (void)setAutomaticallyManagesSubnodes:(BOOL)automaticallyManagesSubnodes
+{
+  ASDN::MutexLocker l(__instanceLock__);
+  _automaticallyManagesSubnodes = automaticallyManagesSubnodes;
+}
+
 #pragma mark - Layout Transition
 
 - (void)transitionLayoutAnimated:(BOOL)animated measurementCompletion:(void (^)())completion
@@ -751,11 +753,11 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c)
       ASLayoutableSetCurrentContext(ASLayoutableContextMake(transitionID, NO));
 
       ASDN::MutexLocker l(__instanceLock__);
-      BOOL disableImplicitHierarchyManagement = self.usesImplicitHierarchyManagement == NO;
-      self.usesImplicitHierarchyManagement = YES; // Temporary flag for 1.9.x
+      BOOL automaticallyManagesSubnodesDisabled = (self.automaticallyManagesSubnodes == NO);
+      self.automaticallyManagesSubnodes = YES; // Temporary flag for 1.9.x
       newLayout = [self calculateLayoutThatFits:constrainedSize];
-      if (disableImplicitHierarchyManagement) {
-        self.usesImplicitHierarchyManagement = NO; // Temporary flag for 1.9.x
+      if (automaticallyManagesSubnodesDisabled) {
+        self.automaticallyManagesSubnodes = NO; // Temporary flag for 1.9.x
       }
       
       ASLayoutableClearCurrentContext();
@@ -820,18 +822,6 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c)
   }
 }
 
-- (BOOL)usesImplicitHierarchyManagement
-{
-  ASDN::MutexLocker l(__instanceLock__);
-  return _usesImplicitHierarchyManagement ? : [[self class] usesImplicitHierarchyManagement];
-}
-
-- (void)setUsesImplicitHierarchyManagement:(BOOL)value
-{
-  ASDN::MutexLocker l(__instanceLock__);
-  _usesImplicitHierarchyManagement = value;
-}
-
 - (BOOL)_isTransitionInProgress
 {
   ASDN::MutexLocker l(__instanceLock__);
@@ -1019,8 +1009,8 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c)
  */
 - (void)_completeLayoutTransition:(ASLayoutTransition *)layoutTransition
 {
-  // Layout transition is not supported for non implicit hierarchy managed nodes yet
-  if (layoutTransition == nil || self.usesImplicitHierarchyManagement == NO) {
+  // Layout transition is not supported for nodes that are not have automatic subnode management enabled
+  if (layoutTransition == nil || self.automaticallyManagesSubnodes == NO) {
     return;
   }
 
@@ -1186,7 +1176,7 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c)
   ASDN::MutexLocker l(__instanceLock__);
 
   // FIXME: Ideally we'd call this as soon as the node receives -setNeedsLayout
-  // but implicit hierarchy management would require us to modify the node tree
+  // but automatic subnode management would require us to modify the node tree
   // in the background on a loaded node, which isn't currently supported.
   if (_pendingViewState.hasSetNeedsLayout) {
     [self __setNeedsLayout];
@@ -1982,7 +1972,7 @@ static NSInteger incrementIfFound(NSInteger i) {
       
       // If a node was added to a supernode, the supernode could be in a layout pending state. All of the hierarchy state
       // properties related to the transition need to be copied over as well as propagated down the subtree.
-      // This is especially important as with Implicit Hierarchy Management adding subnodes can happen while a transition
+      // This is especially important as with automatic subnode management, adding subnodes can happen while a transition
       // is in fly
       if (ASHierarchyStateIncludesLayoutPending(stateToEnterOrExit)) {
         int32_t pendingTransitionId = newSupernode.pendingTransitionID;
@@ -2701,7 +2691,7 @@ void recursivelyTriggerDisplayForLayer(CALayer *layer, BOOL shouldBlock)
   ASDisplayNodeAssertTrue(layout.size.width >= 0.0);
   ASDisplayNodeAssertTrue(layout.size.height >= 0.0);
   
-  if (layoutTransition == nil || self.usesImplicitHierarchyManagement == NO) {
+  if (layoutTransition == nil || self.automaticallyManagesSubnodes == NO) {
     return;
   }
 
@@ -3294,6 +3284,16 @@ static const char *ASDisplayNodeAssociatedNodeKey = "ASAssociatedNode";
   [self cancelLayoutTransition];
 }
 
+- (BOOL)usesImplicitHierarchyManagement
+{
+  return self.automaticallyManagesSubnodes;
+}
+
+- (void)setUsesImplicitHierarchyManagement:(BOOL)enabled
+{
+  self.automaticallyManagesSubnodes = enabled;
+}
+
 - (void)setPlaceholderFadesOut:(BOOL)placeholderFadesOut
 {
   self.placeholderFadeDuration = placeholderFadesOut ? 0.1 : 0.0;

AsyncDisplayKit/ASTableView.mm

@@ -17,7 +17,6 @@
 #import "ASChangeSetDataController.h"
 #import "ASDelegateProxy.h"
 #import "ASDisplayNodeExtras.h"
-#import "ASDisplayNode+Beta.h"
 #import "ASDisplayNode+FrameworkPrivate.h"
 #import "ASInternalHelpers.h"
 #import "ASLayout.h"

AsyncDisplayKit/Private/ASDisplayNode+UIViewBridge.mm

@@ -344,7 +344,7 @@ if (shouldApply) { _layer.layerProperty = (layerValueExpr); } else { ASDisplayNo
     // The node is loaded but we're not on main.
     // We will call [self __setNeedsLayout] when we apply
     // the pending state. We need to call it on main if the node is loaded
-    // to support implicit hierarchy management.
+    // to support automatic subnode management.
     [ASDisplayNodeGetPendingState(self) setNeedsLayout];
   } else {
     // The node is not loaded and we're not on main.

AsyncDisplayKit/Private/ASDisplayNodeInternal.h

@@ -124,7 +124,7 @@ FOUNDATION_EXPORT NSString * const ASRenderingEngineDidDisplayNodesScheduledBefo
   
   // Main thread only
   _ASTransitionContext *_pendingLayoutTransitionContext;
-  BOOL _usesImplicitHierarchyManagement;
+  BOOL _automaticallyManagesSubnodes;
   NSTimeInterval _defaultLayoutTransitionDuration;
   NSTimeInterval _defaultLayoutTransitionDelay;
   UIViewAnimationOptions _defaultLayoutTransitionOptions;

AsyncDisplayKit/Private/_ASHierarchyChangeSet.mm

@@ -15,6 +15,7 @@
 #import "NSIndexSet+ASHelpers.h"
 #import "ASAssert.h"
 #import "ASDisplayNode+Beta.h"
+
 #import <unordered_map>
 
 #define ASFailUpdateValidation(...)\

AsyncDisplayKitTests/ASDisplayNodeImplicitHierarchyTests.m

@@ -47,28 +47,13 @@
 
 @implementation ASDisplayNodeImplicitHierarchyTests
 
-- (void)setUp {
-  [super setUp];
-  [ASDisplayNode setUsesImplicitHierarchyManagement:YES];
-}
-
-- (void)tearDown {
-  [ASDisplayNode setUsesImplicitHierarchyManagement:NO];
-  [super tearDown];
-}
-
 - (void)testFeatureFlag
 {
-  XCTAssert([ASDisplayNode usesImplicitHierarchyManagement]);
   ASDisplayNode *node = [[ASDisplayNode alloc] init];
-  XCTAssert(node.usesImplicitHierarchyManagement);
-
-  [ASDisplayNode setUsesImplicitHierarchyManagement:NO];
-  XCTAssertFalse([ASDisplayNode usesImplicitHierarchyManagement]);
-  XCTAssertFalse(node.usesImplicitHierarchyManagement);
-
-  node.usesImplicitHierarchyManagement = YES;
-  XCTAssert(node.usesImplicitHierarchyManagement);
+  XCTAssertFalse(node.automaticallyManagesSubnodes);
+  
+  node.automaticallyManagesSubnodes = YES;
+  XCTAssertTrue(node.automaticallyManagesSubnodes);
 }
 
 - (void)testInitialNodeInsertionWithOrdering
@@ -80,6 +65,7 @@
   ASDisplayNode *node5 = [[ASDisplayNode alloc] init];
 
   ASSpecTestDisplayNode *node = [[ASSpecTestDisplayNode alloc] init];
+  node.automaticallyManagesSubnodes = YES;
   node.layoutSpecBlock = ^(ASDisplayNode *weakNode, ASSizeRange constrainedSize) {
     ASStaticLayoutSpec *staticLayout = [ASStaticLayoutSpec staticLayoutSpecWithChildren:@[node4]];
     
@@ -106,6 +92,7 @@
   ASDisplayNode *node3 = [[ASDisplayNode alloc] init];
   
   ASSpecTestDisplayNode *node = [[ASSpecTestDisplayNode alloc] init];
+  node.automaticallyManagesSubnodes = YES;
   node.layoutSpecBlock = ^(ASDisplayNode *weakNode, ASSizeRange constrainedSize){
     ASSpecTestDisplayNode *strongNode = (ASSpecTestDisplayNode *)weakNode;
     if ([strongNode.layoutState isEqualToNumber:@1]) {
@@ -136,6 +123,7 @@
   ASDisplayNode *node2 = [[ASDisplayNode alloc] init];
   
   ASSpecTestDisplayNode *node = [[ASSpecTestDisplayNode alloc] init];
+  node.automaticallyManagesSubnodes = YES;
   node.layoutSpecBlock = ^(ASDisplayNode *weakNode, ASSizeRange constrainedSize) {
     ASSpecTestDisplayNode *strongNode = (ASSpecTestDisplayNode *)weakNode;
     if ([strongNode.layoutState isEqualToNumber:@1]) {
@@ -179,6 +167,7 @@
   ASDisplayNode *node2 = [[ASDisplayNode alloc] init];
   
   ASSpecTestDisplayNode *node = [[ASSpecTestDisplayNode alloc] init];
+  node.automaticallyManagesSubnodes = YES;
   
   node.layoutSpecBlock = ^(ASDisplayNode *weakNode, ASSizeRange constrainedSize) {
     ASSpecTestDisplayNode *strongNode = (ASSpecTestDisplayNode *)weakNode;