[ASDisplayNode] Ensure all subclasses are using base class __instanceLock__ and not re-defining their own. (#2754)

* [ASDisplayNode] Ensure all subclasses are using base class __instanceLock__ and not re-defining their own.

This also moves the @package definition of the instance variable to +FrameworkPrivate instead of Internal.h,
because Internal.h should ideally not be used outside of the ASDisplayNode file setup.  This has greatly reduced
the number of imports of Internal.h.

* [ASDisplayNode] Add ASDisplayNode+FrameworkSubclasses.h to share __instanceLock__ definition.

AsyncDisplayKit.xcodeproj/project.pbxproj

@@ -475,6 +475,7 @@
 		DE0702FC1C3671E900D7DE62 /* libAsyncDisplayKit.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 058D09AC195D04C000B7D73C /* libAsyncDisplayKit.a */; };
 		DE4843DC1C93EAC100A1F33B /* ASLayoutTransition.h in Headers */ = {isa = PBXBuildFile; fileRef = E52405B41C8FEF16004DC8E7 /* ASLayoutTransition.h */; };
 		DE6EA3231C14000600183B10 /* ASDisplayNode+FrameworkPrivate.h in Headers */ = {isa = PBXBuildFile; fileRef = DE6EA3211C14000600183B10 /* ASDisplayNode+FrameworkPrivate.h */; };
+		DE7EF4F81DFF77720082B84A /* ASDisplayNode+FrameworkSubclasses.h in Headers */ = {isa = PBXBuildFile; fileRef = DE7EF4F71DFF77720082B84A /* ASDisplayNode+FrameworkSubclasses.h */; };
 		DE84918D1C8FFF2B003D89E9 /* ASRunLoopQueue.h in Headers */ = {isa = PBXBuildFile; fileRef = 81EE384D1C8E94F000456208 /* ASRunLoopQueue.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		DE84918E1C8FFF9F003D89E9 /* ASRunLoopQueue.mm in Sources */ = {isa = PBXBuildFile; fileRef = 81EE384E1C8E94F000456208 /* ASRunLoopQueue.mm */; };
 		DE89C1701DCEB9CC00D49D74 /* ASLayoutElementInspectorCell.h in Headers */ = {isa = PBXBuildFile; fileRef = DE89C16A1DCEB9CC00D49D74 /* ASLayoutElementInspectorCell.h */; };
@@ -1177,6 +1178,7 @@
 		DBDB83921C6E879900D0098C /* ASPagerFlowLayout.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASPagerFlowLayout.h; sourceTree = "<group>"; };
 		DBDB83931C6E879900D0098C /* ASPagerFlowLayout.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ASPagerFlowLayout.m; sourceTree = "<group>"; };
 		DE6EA3211C14000600183B10 /* ASDisplayNode+FrameworkPrivate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "ASDisplayNode+FrameworkPrivate.h"; sourceTree = "<group>"; };
+		DE7EF4F71DFF77720082B84A /* ASDisplayNode+FrameworkSubclasses.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "ASDisplayNode+FrameworkSubclasses.h"; sourceTree = "<group>"; };
 		DE89C16A1DCEB9CC00D49D74 /* ASLayoutElementInspectorCell.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASLayoutElementInspectorCell.h; sourceTree = "<group>"; };
 		DE89C16B1DCEB9CC00D49D74 /* ASLayoutElementInspectorCell.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ASLayoutElementInspectorCell.m; sourceTree = "<group>"; };
 		DE89C16C1DCEB9CC00D49D74 /* ASLayoutElementInspectorNode.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASLayoutElementInspectorNode.h; sourceTree = "<group>"; };
@@ -1598,6 +1600,7 @@
 				058D0A09195D050800B7D73C /* ASDisplayNode+DebugTiming.h */,
 				058D0A0A195D050800B7D73C /* ASDisplayNode+DebugTiming.mm */,
 				DE6EA3211C14000600183B10 /* ASDisplayNode+FrameworkPrivate.h */,
+				DE7EF4F71DFF77720082B84A /* ASDisplayNode+FrameworkSubclasses.h */,
 				058D0A0B195D050800B7D73C /* ASDisplayNode+UIViewBridge.mm */,
 				058D0A0C195D050800B7D73C /* ASDisplayNodeInternal.h */,
 				6959433D1D70815300B0EE1F /* ASDisplayNodeLayout.h */,
@@ -1814,6 +1817,7 @@
 				69F10C871C84C35D0026140C /* ASRangeControllerUpdateRangeProtocol+Beta.h in Headers */,
 				B350623C1B010EFD0018CF92 /* _ASAsyncTransaction.h in Headers */,
 				9C70F20D1CDBE9CB007D6C76 /* ASDefaultPlayButton.h in Headers */,
+				DE7EF4F81DFF77720082B84A /* ASDisplayNode+FrameworkSubclasses.h in Headers */,
 				68355B411CB57A6C001D4E68 /* ASImageContainerProtocolCategories.h in Headers */,
 				7630FFA81C9E267E007A7C0E /* ASVideoNode.h in Headers */,
 				B350623F1B010EFD0018CF92 /* _ASAsyncTransactionContainer.h in Headers */,

AsyncDisplayKit/ASButtonNode.mm

@@ -11,15 +11,13 @@
 #import "ASButtonNode.h"
 #import "ASStackLayoutSpec.h"
 #import "ASThread.h"
-#import "ASDisplayNode+Subclasses.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
 #import "ASBackgroundLayoutSpec.h"
 #import "ASInsetLayoutSpec.h"
 #import "ASAbsoluteLayoutSpec.h"
 
 @interface ASButtonNode ()
 {
-  ASDN::RecursiveMutex __instanceLock__;
-  
   NSAttributedString *_normalAttributedTitle;
   NSAttributedString *_highlightedAttributedTitle;
   NSAttributedString *_selectedAttributedTitle;

AsyncDisplayKit/ASCellNode.mm

@@ -12,7 +12,6 @@
 
 #import "ASEqualityHelpers.h"
 #import "ASInternalHelpers.h"
-#import "ASDisplayNodeInternal.h"
 #import "ASDisplayNode+FrameworkPrivate.h"
 #import "ASCollectionView+Undeprecated.h"
 #import "ASTableView+Undeprecated.h"

AsyncDisplayKit/ASCollectionNode.mm

@@ -13,8 +13,8 @@
 #import "ASCollectionInternal.h"
 #import "ASCollectionViewLayoutFacilitatorProtocol.h"
 #import "ASCollectionNode.h"
-#import "ASDisplayNodeInternal.h"
 #import "ASDisplayNode+Subclasses.h"
+#import "ASDisplayNode+FrameworkPrivate.h"
 #import "ASEnvironmentInternal.h"
 #import "ASInternalHelpers.h"
 #import "ASCellNode+Internal.h"
@@ -228,7 +228,7 @@
     // and asserting here isn't an option – it is a common pattern for users to clear
     // the delegate/dataSource in dealloc, which may be running on a background thread.
     // It is important that we avoid retaining self in this block, so that this method is dealloc-safe.
-    ASCollectionView *view = (ASCollectionView *)_view;
+    ASCollectionView *view = self.view;
     ASPerformBlockOnMainThread(^{
       view.asyncDelegate = delegate;
     });
@@ -254,7 +254,7 @@
     // and asserting here isn't an option – it is a common pattern for users to clear
     // the delegate/dataSource in dealloc, which may be running on a background thread.
     // It is important that we avoid retaining self in this block, so that this method is dealloc-safe.
-    ASCollectionView *view = (ASCollectionView *)_view;
+    ASCollectionView *view = self.view;
     ASPerformBlockOnMainThread(^{
       view.asyncDataSource = dataSource;
     });

AsyncDisplayKit/ASDisplayNode.mm

@@ -9,8 +9,7 @@
 //
 
 #import "ASDisplayNodeInternal.h"
-#import "ASDisplayNode+Subclasses.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
-#import "ASDisplayNode+FrameworkPrivate.h"
 #import "ASDisplayNode+Beta.h"
 #import "AsyncDisplayKit+Debug.h"
 

AsyncDisplayKit/ASImageNode.mm

@@ -15,22 +15,22 @@
 #import "_ASDisplayLayer.h"
 #import "ASAssert.h"
 #import "ASDimension.h"
-#import "ASDisplayNode+Subclasses.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
-#import "ASDisplayNodeInternal.h"
 #import "ASDisplayNodeExtras.h"
 #import "ASDisplayNode+Beta.h"
 #import "ASLayout.h"
 #import "ASTextNode.h"
 #import "ASImageNode+AnimatedImagePrivate.h"
-
 #import "ASImageNode+CGExtras.h"
 #import "AsyncDisplayKit+Debug.h"
-
 #import "ASInternalHelpers.h"
 #import "ASEqualityHelpers.h"
 #import "ASEqualityHashHelpers.h"
 #import "ASWeakMap.h"
 
+// TODO: It would be nice to remove this dependency; it's the only subclass using more than +FrameworkSubclasses.h
+#import "ASDisplayNodeInternal.h"
+
 #include <functional>
 
 struct ASImageNodeDrawParameters {
@@ -244,7 +244,7 @@ struct ASImageNodeDrawParameters {
   _drawParameter = {
     .bounds = self.bounds,
     .opaque = self.opaque,
-    .contentsScale = _contentsScaleForDisplay,
+    .contentsScale = self.contentsScaleForDisplay,
     .backgroundColor = self.backgroundColor,
     .contentMode = self.contentMode,
     .cropEnabled = _cropEnabled,

AsyncDisplayKit/ASMapNode.mm

@@ -13,8 +13,7 @@
 
 #import <tgmath.h>
 
-#import "ASDisplayNodeInternal.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
-#import "ASDisplayNode+Subclasses.h"
 #import "ASDisplayNodeExtras.h"
 #import "ASInsetLayoutSpec.h"
 #import "ASInternalHelpers.h"

AsyncDisplayKit/ASMultiplexImageNode.mm

@@ -14,8 +14,7 @@
 #import <AssetsLibrary/AssetsLibrary.h>
 
 #import "ASAvailability.h"
-#import "ASDisplayNode+Subclasses.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
-#import "ASDisplayNode+FrameworkPrivate.h"
 #import "ASDisplayNodeExtras.h"
 #import "ASLog.h"
 #import "ASPhotosFrameworkImageRequest.h"
@@ -84,7 +83,6 @@ typedef void(^ASMultiplexImageLoadCompletionBlock)(UIImage *image, id imageIdent
   id _downloadIdentifier;
   
   // Properties
-  ASDN::RecursiveMutex __instanceLock__;
   BOOL _shouldRenderProgressImages;
   
   //set on init only

AsyncDisplayKit/ASNetworkImageNode.mm

@@ -11,10 +11,8 @@
 #import "ASNetworkImageNode.h"
 
 #import "ASBasicImageDownloader.h"
-#import "ASDisplayNodeInternal.h"
 #import "ASDisplayNodeExtras.h"
-#import "ASDisplayNode+Subclasses.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
-#import "ASDisplayNode+FrameworkPrivate.h"
 #import "ASEqualityHelpers.h"
 #import "ASInternalHelpers.h"
 #import "ASImageContainerProtocolCategories.h"

AsyncDisplayKit/ASTableNode.mm

@@ -13,8 +13,8 @@
 #import "ASTableNode.h"
 #import "ASTableViewInternal.h"
 #import "ASEnvironmentInternal.h"
-#import "ASDisplayNodeInternal.h"
 #import "ASDisplayNode+Subclasses.h"
+#import "ASDisplayNode+FrameworkPrivate.h"
 #import "ASInternalHelpers.h"
 #import "ASCellNode+Internal.h"
 #import "AsyncDisplayKit+Debug.h"
@@ -197,7 +197,7 @@
     // and asserting here isn't an option – it is a common pattern for users to clear
     // the delegate/dataSource in dealloc, which may be running on a background thread.
     // It is important that we avoid retaining self in this block, so that this method is dealloc-safe.
-    ASTableView *view = (ASTableView *)_view;
+    ASTableView *view = self.view;
     ASPerformBlockOnMainThread(^{
       view.asyncDelegate = delegate;
     });
@@ -224,7 +224,7 @@
     // and asserting here isn't an option – it is a common pattern for users to clear
     // the delegate/dataSource in dealloc, which may be running on a background thread.
     // It is important that we avoid retaining self in this block, so that this method is dealloc-safe.
-    ASTableView *view = (ASTableView *)_view;
+    ASTableView *view = self.view;
     ASPerformBlockOnMainThread(^{
       view.asyncDataSource = dataSource;
     });

AsyncDisplayKit/ASTextNode.mm

@@ -15,8 +15,7 @@
 #import <tgmath.h>
 
 #import "_ASDisplayLayer.h"
-#import "ASDisplayNode+Subclasses.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
-#import "ASDisplayNodeInternal.h"
 #import "ASHighlightOverlayLayer.h"
 #import "ASDisplayNodeExtras.h"
 

AsyncDisplayKit/ASVideoNode.mm

@@ -9,9 +9,7 @@
 //
 #if TARGET_OS_IOS
 #import <AVFoundation/AVFoundation.h>
-#import "ASDisplayNodeInternal.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
-#import "ASDisplayNode+Subclasses.h"
-#import "ASDisplayNode+FrameworkPrivate.h"
 #import "ASVideoNode.h"
 #import "ASEqualityHelpers.h"
 #import "ASInternalHelpers.h"

AsyncDisplayKit/ASVideoPlayerNode.mm

@@ -12,7 +12,7 @@
 
 #import "ASVideoPlayerNode.h"
 #import "ASDefaultPlaybackButton.h"
-#import "ASDisplayNodeInternal.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
 
 static void *ASVideoPlayerNodeContext = &ASVideoPlayerNodeContext;
 

AsyncDisplayKit/ASViewController.mm

@@ -13,7 +13,6 @@
 #import "ASViewController.h"
 #import "ASAssert.h"
 #import "ASAvailability.h"
-#import "ASDisplayNodeInternal.h"
 #import "ASDisplayNode+FrameworkPrivate.h"
 #import "ASLayout.h"
 #import "ASTraitCollection.h"

AsyncDisplayKit/Details/ASRangeController.mm

@@ -13,8 +13,7 @@
 #import "ASAssert.h"
 #import "ASCellNode.h"
 #import "ASDisplayNodeExtras.h"
-#import "ASDisplayNodeInternal.h"
+#import "ASDisplayNodeInternal.h" // Required for interfaceState and hierarchyState setter methods.
-#import "ASMultidimensionalArrayUtils.h"
 #import "ASInternalHelpers.h"
 #import "ASMultiDimensionalArrayUtils.h"
 #import "ASWeakSet.h"

AsyncDisplayKit/Layout/ASLayout.h

@@ -82,9 +82,9 @@ ASDISPLAYNODE_EXTERN_C_END
  * Designated initializer
  */
 - (instancetype)initWithLayoutElement:(id<ASLayoutElement>)layoutElement
-                              size:(CGSize)size
+                                 size:(CGSize)size
-                          position:(CGPoint)position
+                             position:(CGPoint)position
-                        sublayouts:(nullable NSArray<ASLayout *> *)sublayouts NS_DESIGNATED_INITIALIZER;
+                           sublayouts:(nullable NSArray<ASLayout *> *)sublayouts NS_DESIGNATED_INITIALIZER;
 
 /**
  * Convenience class initializer for layout construction.

AsyncDisplayKit/Layout/ASLayoutElement.mm

@@ -10,7 +10,7 @@
 //  of patent rights can be found in the PATENTS file in the same directory.
 //
 
-#import "ASDisplayNodeInternal.h"
+#import "ASDisplayNode+FrameworkPrivate.h"
 
 #import <map>
 #import <atomic>

AsyncDisplayKit/Layout/ASStackLayoutSpec.mm

@@ -20,9 +20,6 @@
 #import "ASThread.h"
 
 @implementation ASStackLayoutSpec
-{
-  ASDN::RecursiveMutex __instanceLock__;
-}
 
 - (instancetype)init
 {

AsyncDisplayKit/Private/ASDisplayNode+AsyncDisplay.mm

@@ -13,7 +13,7 @@
 #import "_ASDisplayLayer.h"
 #import "ASAssert.h"
 #import "ASDisplayNodeInternal.h"
-#import "ASDisplayNode+FrameworkPrivate.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
 #import "ASInternalHelpers.h"
 
 @interface ASDisplayNode () <_ASDisplayLayerDelegate>

AsyncDisplayKit/Private/ASDisplayNode+FrameworkPrivate.h

@@ -15,6 +15,7 @@
 
 #import "ASDisplayNode.h"
 #import "ASThread.h"
+#import "ASObjectDescriptionHelpers.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -95,7 +96,7 @@ __unused static NSString * _Nonnull NSStringFromASHierarchyState(ASHierarchyStat
 	return [NSString stringWithFormat:@"{ %@ }", [states componentsJoinedByString:@" | "]];
 }
 
-@interface ASDisplayNode ()
+@interface ASDisplayNode () <ASDescriptionProvider, ASDebugDescriptionProvider>
 {
 @protected
   ASInterfaceState _interfaceState;
@@ -105,6 +106,9 @@ __unused static NSString * _Nonnull NSStringFromASHierarchyState(ASHierarchyStat
 // The view class to use when creating a new display node instance. Defaults to _ASDisplayView.
 + (Class)viewClass;
 
+// Thread safe way to access the bounds of the node
+@property (nonatomic, assign) CGRect threadSafeBounds;
+
 // These methods are recursive, and either union or remove the provided interfaceState to all sub-elements.
 - (void)enterInterfaceState:(ASInterfaceState)interfaceState;
 - (void)exitInterfaceState:(ASInterfaceState)interfaceState;

AsyncDisplayKit/Private/ASDisplayNode+FrameworkSubclasses.h

@@ -0,0 +1,33 @@
+//
+//  ASDisplayNode+FrameworkPrivate.h
+//  AsyncDisplayKit
+//
+//  Copyright (c) 2014-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under the BSD-style license found in the
+//  LICENSE file in the root directory of this source tree. An additional grant
+//  of patent rights can be found in the PATENTS file in the same directory.
+//
+
+//
+// The following methods are ONLY for use by _ASDisplayLayer, _ASDisplayView, and ASDisplayNode.
+// These methods must never be called or overridden by other classes.
+//
+
+#import "ASDisplayNode.h"
+#import "ASThread.h"
+
+// These are included because most internal subclasses need it.
+#import "ASDisplayNode+Subclasses.h"
+#import "ASDisplayNode+FrameworkPrivate.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ASDisplayNode ()
+{
+  // Protects access to _view, _layer, _pendingViewState, _subnodes, _supernode, and other properties which are accessed from multiple threads.
+  @package
+  ASDN::RecursiveMutex __instanceLock__;
+}
+@end
+
+NS_ASSUME_NONNULL_END

AsyncDisplayKit/Private/ASDisplayNode+UIViewBridge.mm

@@ -14,6 +14,7 @@
 #import "ASDisplayNodeInternal.h"
 #import "ASDisplayNode+Subclasses.h"
 #import "ASDisplayNode+FrameworkPrivate.h"
+#import "ASDisplayNode+FrameworkSubclasses.h"
 #import "ASPendingStateController.h"
 
 /**

AsyncDisplayKit/Private/ASDisplayNodeInternal.h

@@ -20,7 +20,6 @@
 #import "ASLayoutElement.h"
 #import "ASLayoutTransition.h"
 #import "ASEnvironment.h"
-#import "ASObjectDescriptionHelpers.h"
 #import "ASWeakSet.h"
 
 #import "ASDisplayNode+Beta.h"
@@ -57,13 +56,11 @@ FOUNDATION_EXPORT NSString * const ASRenderingEngineDidDisplayNodesScheduledBefo
 
 #define TIME_DISPLAYNODE_OPS 0 // If you're using this information frequently, try: (DEBUG || PROFILE)
 
-@interface ASDisplayNode () <ASDescriptionProvider, ASDebugDescriptionProvider>
+@interface ASDisplayNode ()
 {
 @package
   _ASPendingState *_pendingViewState;
 
-  // Protects access to _view, _layer, _pendingViewState, _subnodes, _supernode, and other properties which are accessed from multiple threads.
-  ASDN::RecursiveMutex __instanceLock__;
   UIView *_view;
   CALayer *_layer;
 
@@ -197,10 +194,6 @@ FOUNDATION_EXPORT NSString * const ASRenderingEngineDidDisplayNodesScheduledBefo
 /// Bitmask to check which methods an object overrides.
 @property (nonatomic, assign, readonly) ASDisplayNodeMethodOverrides methodOverrides;
 
-/// Thread safe way to access the bounds of the node
-@property (nonatomic, assign) CGRect threadSafeBounds;
-
-
 // Swizzle to extend the builtin functionality with custom logic
 - (BOOL)__shouldLoadViewOrLayer;
 

AsyncDisplayKit/Private/ASLayoutTransition.mm

@@ -11,9 +11,11 @@
 //
 
 #import "ASLayoutTransition.h"
-
-#import "ASDisplayNodeInternal.h"
 #import "ASLayout.h"
+#import "ASThread.h"
+#import "ASDisplayNode+Beta.h"
+
+#import "ASDisplayNodeInternal.h" // Required for _insertSubnode... / _removeFromSupernode.
 
 #import <queue>
 #import <memory>

AsyncDisplayKit/Private/ASPendingStateController.mm

@@ -13,7 +13,7 @@
 #import "ASPendingStateController.h"
 #import "ASThread.h"
 #import "ASWeakSet.h"
-#import "ASDisplayNodeInternal.h"
+#import "ASDisplayNodeInternal.h" // Required for -applyPendingViewState; consider moving this to +FrameworkPrivate
 
 @interface ASPendingStateController()
 {