Merge branch 'master' into update-objc

Conflicts: AsyncDisplayKit/ASCellNode.h
2025-12-23 22:55:00 +00:00 · 2015-11-02 09:36:46 -08:00
parent 82c1549d8f 7b112a2dcd
commit b4b88da8cd
39 changed files with 592 additions and 206 deletions
--- a/AsyncDisplayKit.xcodeproj/project.pbxproj
+++ b/AsyncDisplayKit.xcodeproj/project.pbxproj
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 /* Begin PBXContainerItemProxy section */
@@ -607,11 +609,11 @@
 		9C8221941BA237B80037F19A /* ASStackBaselinePositionedLayout.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = ASStackBaselinePositionedLayout.mm; sourceTree = "<group>"; };
 		9CDC18CB1B910E12004965E2 /* ASLayoutablePrivate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ASLayoutablePrivate.h; path = AsyncDisplayKit/Layout/ASLayoutablePrivate.h; sourceTree = "<group>"; };
 		9F06E5CC1B4CAF4200F015D8 /* ASCollectionViewTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ASCollectionViewTests.m; sourceTree = "<group>"; };
+		AC026B571BD3F61800BBC17E /* ASStaticLayoutSpecSnapshotTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ASStaticLayoutSpecSnapshotTests.m; sourceTree = "<group>"; };
 		AC026B671BD57D6F00BBC17E /* ASChangeSetDataController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASChangeSetDataController.h; sourceTree = "<group>"; };
 		AC026B681BD57D6F00BBC17E /* ASChangeSetDataController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ASChangeSetDataController.m; sourceTree = "<group>"; };
 		AC026B6D1BD57DBF00BBC17E /* _ASHierarchyChangeSet.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = _ASHierarchyChangeSet.h; sourceTree = "<group>"; };
 		AC026B6E1BD57DBF00BBC17E /* _ASHierarchyChangeSet.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = _ASHierarchyChangeSet.m; sourceTree = "<group>"; };
-		AC026B571BD3F61800BBC17E /* ASStaticLayoutSpecSnapshotTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ASStaticLayoutSpecSnapshotTests.m; sourceTree = "<group>"; };
 		AC21EC0F1B3D0BF600C8B19A /* ASStackLayoutDefines.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = ASStackLayoutDefines.h; path = AsyncDisplayKit/Layout/ASStackLayoutDefines.h; sourceTree = "<group>"; };
 		AC3C4A4F1A1139C100143C57 /* ASCollectionView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASCollectionView.h; sourceTree = "<group>"; };
 		AC3C4A501A1139C100143C57 /* ASCollectionView.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = ASCollectionView.mm; sourceTree = "<group>"; };
@@ -667,6 +669,8 @@
 		D3779BCFF841AD3EB56537ED /* Pods-AsyncDisplayKitTests.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-AsyncDisplayKitTests.release.xcconfig"; path = "Pods/Target Support Files/Pods-AsyncDisplayKitTests/Pods-AsyncDisplayKitTests.release.xcconfig"; sourceTree = "<group>"; };
 		D785F6601A74327E00291744 /* ASScrollNode.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASScrollNode.h; sourceTree = "<group>"; };
 		D785F6611A74327E00291744 /* ASScrollNode.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ASScrollNode.m; sourceTree = "<group>"; };
+		DECBD6E51BE56E1900CF4905 /* ASButtonNode.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ASButtonNode.h; sourceTree = "<group>"; };
+		DECBD6E61BE56E1900CF4905 /* ASButtonNode.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = ASButtonNode.mm; sourceTree = "<group>"; };
 		EFA731F0396842FF8AB635EE /* libPods-AsyncDisplayKitTests.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-AsyncDisplayKitTests.a"; sourceTree = BUILT_PRODUCTS_DIR; };
 		FB07EABBCF28656C6297BC2D /* Pods-AsyncDisplayKitTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-AsyncDisplayKitTests.debug.xcconfig"; path = "Pods/Target Support Files/Pods-AsyncDisplayKitTests/Pods-AsyncDisplayKitTests.debug.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
@@ -788,6 +792,8 @@
 				AC3C4A531A113EEC00143C57 /* ASCollectionViewProtocols.h */,
 				058D09D5195D050800B7D73C /* ASControlNode.h */,
 				058D09D6195D050800B7D73C /* ASControlNode.m */,
+				DECBD6E51BE56E1900CF4905 /* ASButtonNode.h */,
+				DECBD6E61BE56E1900CF4905 /* ASButtonNode.mm */,
 				058D09D7195D050800B7D73C /* ASControlNode+Subclasses.h */,
 				058D09D8195D050800B7D73C /* ASDisplayNode.h */,
 				058D09D9195D050800B7D73C /* ASDisplayNode.mm */,
@@ -1129,6 +1135,7 @@
 				05A6D05A19D0EB64002DD95E /* ASDealloc2MainObject.h in Headers */,
 				ACF6ED201B17843500DA7C62 /* ASDimension.h in Headers */,
 				058D0A78195D05F900B7D73C /* ASDisplayNode+DebugTiming.h in Headers */,
+				DECBD6E71BE56E1900CF4905 /* ASButtonNode.h in Headers */,
 				058D0A4C195D05CB00B7D73C /* ASDisplayNode+Subclasses.h in Headers */,
 				058D0A4A195D05CB00B7D73C /* ASDisplayNode.h in Headers */,
 				058D0A84195D060300B7D73C /* ASDisplayNodeExtraIvars.h in Headers */,
@@ -1267,6 +1274,7 @@
 				B350625C1B010F070018CF92 /* ASLog.h in Headers */,
 				0442850E1BAA64EC00D16268 /* ASMultidimensionalArrayUtils.h in Headers */,
 				B35062041B010EFD0018CF92 /* ASMultiplexImageNode.h in Headers */,
+				DECBD6E81BE56E1900CF4905 /* ASButtonNode.h in Headers */,
 				B35062241B010EFD0018CF92 /* ASMutableAttributedStringBuilder.h in Headers */,
 				B35062061B010EFD0018CF92 /* ASNetworkImageNode.h in Headers */,
 				34EFC76C1B701CED00AD841F /* ASOverlayLayoutSpec.h in Headers */,
@@ -1355,6 +1363,7 @@
 				058D09B9195D04C000B7D73C /* Frameworks */,
 				058D09BA195D04C000B7D73C /* Resources */,
 				3B9D88CDF51B429C8409E4B6 /* Copy Pods Resources */,
+				6CC5F540055A48FCA8C12BF5 /* Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -1391,7 +1400,7 @@
 		058D09A4195D04C000B7D73C /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0510;
+				LastUpgradeCheck = 0710;
 				ORGANIZATIONNAME = Facebook;
 				TargetAttributes = {
 					057D02BE1AC0A66700C7AC3C = {
@@ -1484,6 +1493,21 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-AsyncDisplayKitTests/Pods-AsyncDisplayKitTests-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
+		6CC5F540055A48FCA8C12BF5 /* Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Embed Pods Frameworks";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-AsyncDisplayKitTests/Pods-AsyncDisplayKitTests-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 /* End PBXShellScriptBuildPhase section */

 /* Begin PBXSourcesBuildPhase section */
@@ -1541,6 +1565,7 @@
 				251B8EFA1BBB3D690087C538 /* ASCollectionViewFlowLayoutInspector.m in Sources */,
 				ACF6ED271B17843500DA7C62 /* ASLayoutSpec.mm in Sources */,
 				0516FA411A1563D200B4EBED /* ASMultiplexImageNode.mm in Sources */,
+				DECBD6E91BE56E1900CF4905 /* ASButtonNode.mm in Sources */,
 				058D0A1B195D050800B7D73C /* ASMutableAttributedStringBuilder.m in Sources */,
 				055B9FA91A1C154B00035D6D /* ASNetworkImageNode.mm in Sources */,
 				ACF6ED2C1B17843500DA7C62 /* ASOverlayLayoutSpec.mm in Sources */,
@@ -1657,6 +1682,7 @@
 				34EFC7681B701CDE00AD841F /* ASLayout.mm in Sources */,
 				9C5FA3541B8F6ADF00A62714 /* ASLayoutOptions.mm in Sources */,
 				9C5FA3601B90C9A500A62714 /* ASLayoutOptionsPrivate.mm in Sources */,
+				DECBD6EA1BE56E1900CF4905 /* ASButtonNode.mm in Sources */,
 				34EFC76B1B701CEB00AD841F /* ASLayoutSpec.mm in Sources */,
 				B35062051B010EFD0018CF92 /* ASMultiplexImageNode.mm in Sources */,
 				B35062251B010EFD0018CF92 /* ASMutableAttributedStringBuilder.m in Sources */,
@@ -1771,6 +1797,7 @@
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
+				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_GENERATE_TEST_COVERAGE_FILES = YES;
--- a/AsyncDisplayKit.xcodeproj/xcshareddata/xcschemes/AsyncDisplayKit-iOS.xcscheme
+++ b/AsyncDisplayKit.xcodeproj/xcshareddata/xcschemes/AsyncDisplayKit-iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0700"
+   LastUpgradeVersion = "0710"
   version = "1.3">
   <BuildAction
      parallelizeBuildables = "YES"
--- a/AsyncDisplayKit.xcodeproj/xcshareddata/xcschemes/AsyncDisplayKit.xcscheme
+++ b/AsyncDisplayKit.xcodeproj/xcshareddata/xcschemes/AsyncDisplayKit.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0700"
+   LastUpgradeVersion = "0710"
   version = "1.3">
   <BuildAction
      parallelizeBuildables = "YES"
--- a/AsyncDisplayKit/ASButtonNode.h
+++ b/AsyncDisplayKit/ASButtonNode.h
@@ -0,0 +1,40 @@
+/* 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.
+ */
+
+#import <AsyncDisplayKit/AsyncDisplayKit.h>
+
+typedef enum : NSUInteger {
+  ASButtonStateNormal,
+  ASButtonStateHighlighted,
+  ASButtonStateDisabled,
+} ASButtonState;
+
+@interface ASButtonNode : ASControlNode
+
+@property (nonatomic, readonly) ASTextNode *titleNode;
+@property (nonatomic, readonly) ASImageNode *imageNode;
+
+/**
+ Spacing between image and title. Defaults to 8.0.
+ */
+@property (nonatomic, assign) CGFloat contentSpacing;
+
+/**
+ Whether button should be laid out vertically (image on top of text) or horizontally (image to the left of text).
+ ASButton node does not yet support RTL but it should be fairly easy to implement.
+ Defaults to YES.
+ */
+@property (nonatomic, assign) BOOL laysOutHorizontally;
+
+- (NSAttributedString *)attributedTitleForState:(ASButtonState)state;
+- (void)setAttributedTitle:(NSAttributedString *)title forState:(ASButtonState)state;
+
+- (UIImage *)imageForState:(ASButtonState)state;
+- (void)setImage:(UIImage *)image forState:(ASButtonState)state;
+
+@end
--- a/AsyncDisplayKit/ASButtonNode.mm
+++ b/AsyncDisplayKit/ASButtonNode.mm
@@ -0,0 +1,222 @@
+/* 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.
+ */
+
+#import "ASButtonNode.h"
+
+#import <AsyncDisplayKit/ASThread.h>
+
+@interface ASButtonNode ()
+{
+  ASDN::RecursiveMutex _propertyLock;
+  
+  NSAttributedString *_normalAttributedTitle;
+  NSAttributedString *_highlightedAttributedTitle;
+  NSAttributedString *_disabledAttributedTitle;
+  
+  UIImage *_normalImage;
+  UIImage *_highlightedImage;
+  UIImage *_disabledImage;
+}
+
+@end
+
+@implementation ASButtonNode
+
+@synthesize contentSpacing = _contentSpacing;
+@synthesize laysOutHorizontally = _laysOutHorizontally;
+
+- (instancetype)init
+{
+  if (self = [super init]) {    
+    _contentSpacing = 8.0;
+    _laysOutHorizontally = YES;
+
+    _titleNode = [[ASTextNode alloc] init];
+    _imageNode = [[ASImageNode alloc] init];
+    
+    [self addSubnode:_titleNode];
+    [self addSubnode:_imageNode];
+    
+    [self addTarget:self action:@selector(controlEventUpdated:) forControlEvents:ASControlNodeEventAllEvents];
+  }
+  return self;
+}
+
+- (void)controlEventUpdated:(ASControlNode *)node
+{
+  [self updateImage];
+  [self updateTitle];
+}
+
+- (void)updateImage
+{
+  ASDN::MutexLocker l(_propertyLock);
+  
+  UIImage *newImage;
+  if (self.enabled == NO && _disabledImage) {
+    newImage = _disabledImage;
+  } else if (self.highlighted && _highlightedImage) {
+    newImage = _highlightedImage;
+  } else {
+    newImage = _normalImage;
+  }
+  
+  if (newImage != self.imageNode.image) {
+    self.imageNode.image = newImage;
+    [self setNeedsLayout];
+  }
+}
+
+- (void)updateTitle
+{
+  ASDN::MutexLocker l(_propertyLock);
+  NSAttributedString *newTitle;
+  if (self.enabled == NO && _disabledAttributedTitle) {
+    newTitle = _disabledAttributedTitle;
+  } else if (self.highlighted && _highlightedAttributedTitle) {
+    newTitle = _highlightedAttributedTitle;
+  } else {
+    newTitle = _normalAttributedTitle;
+  }
+  
+  if (newTitle != self.titleNode.attributedString) {
+    self.titleNode.attributedString = newTitle;
+    [self setNeedsLayout];
+  }
+}
+
+- (CGFloat)contentSpacing
+{
+  ASDN::MutexLocker l(_propertyLock);
+  return _contentSpacing;
+}
+
+- (void)setContentSpacing:(CGFloat)contentSpacing
+{
+  ASDN::MutexLocker l(_propertyLock);
+  if (contentSpacing == _contentSpacing)
+    return;
+  
+  _contentSpacing = contentSpacing;
+  [self setNeedsLayout];
+}
+
+- (BOOL)laysOutHorizontally
+{
+  ASDN::MutexLocker l(_propertyLock);
+  return _laysOutHorizontally;
+}
+
+- (void)setLaysOutHorizontally:(BOOL)laysOutHorizontally
+{
+  ASDN::MutexLocker l(_propertyLock);
+  if (laysOutHorizontally == _laysOutHorizontally)
+    return;
+  
+  _laysOutHorizontally = laysOutHorizontally;
+  [self setNeedsLayout];
+}
+
+- (NSAttributedString *)attributedTitleForState:(ASButtonState)state
+{
+  ASDN::MutexLocker l(_propertyLock);
+  switch (state) {
+    case ASButtonStateNormal:
+      return _normalAttributedTitle;
+      
+    case ASButtonStateHighlighted:
+      return _highlightedAttributedTitle;
+      
+    case ASButtonStateDisabled:
+      return _disabledAttributedTitle;
+  }
+}
+
+- (void)setAttributedTitle:(NSAttributedString *)title forState:(ASButtonState)state
+{
+  ASDN::MutexLocker l(_propertyLock);
+  switch (state) {
+    case ASButtonStateNormal:
+      _normalAttributedTitle = [title copy];
+      break;
+      
+    case ASButtonStateHighlighted:
+      _highlightedAttributedTitle = [title copy];
+      break;
+      
+    case ASButtonStateDisabled:
+      _disabledAttributedTitle = [title copy];
+      break;
+  }
+  [self updateTitle];
+}
+
+- (UIImage *)imageForState:(ASButtonState)state
+{
+  ASDN::MutexLocker l(_propertyLock);
+  switch (state) {
+    case ASButtonStateNormal:
+      return _normalImage;
+      
+    case ASButtonStateHighlighted:
+      return _highlightedImage;
+      
+    case ASButtonStateDisabled:
+      return _disabledImage;
+  }
+}
+
+- (void)setImage:(UIImage *)image forState:(ASButtonState)state
+{
+  ASDN::MutexLocker l(_propertyLock);
+  switch (state) {
+    case ASButtonStateNormal:
+      _normalImage = image;
+      break;
+      
+    case ASButtonStateHighlighted:
+      _highlightedImage = image;
+      break;
+      
+    case ASButtonStateDisabled:
+      _disabledImage = image;
+      break;
+  }
+  [self updateImage];
+}
+
+- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
+{
+  ASStackLayoutSpec *stack = [[ASStackLayoutSpec alloc] init];
+  stack.direction = self.laysOutHorizontally ? ASStackLayoutDirectionHorizontal : ASStackLayoutDirectionVertical;
+  stack.spacing = self.contentSpacing;
+  stack.justifyContent = ASStackLayoutJustifyContentCenter;
+  stack.alignItems = ASStackLayoutAlignItemsCenter;
+  
+  NSMutableArray *children = [[NSMutableArray alloc] initWithCapacity:2];
+  if (self.imageNode.image) {
+    [children addObject:self.imageNode];
+  }
+  
+  if (self.titleNode.attributedString.length > 0) {
+    [children addObject:self.titleNode];
+  }
+  
+  stack.children = children;
+  
+  return stack;
+}
+
+- (void)layout
+{
+  [super layout];
+  self.imageNode.hidden = self.imageNode.image == nil;
+  self.titleNode.hidden = self.titleNode.attributedString.length > 0 == NO;
+}
+
+@end
--- a/AsyncDisplayKit/ASCellNode.h
+++ b/AsyncDisplayKit/ASCellNode.h
@@ -10,6 +10,23 @@

 NS_ASSUME_NONNULL_BEGIN

+@class ASCellNode;
+
+typedef NSUInteger ASCellNodeAnimation;
+
+@protocol ASCellNodeLayoutDelegate <NSObject>
+
+/**
+ * Notifies the delegate that the specified cell node has done a relayout.
+ * The notification is done on main thread.
+ *
+ * @param node A node informing the delegate about the relayout.
+ *
+ * @param suggestedAnimation A constant indicates how the delegate should animate. See UITableViewRowAnimation.
+ */
+- (void)node:(ASCellNode *)node didRelayoutWithSuggestedAnimation:(ASCellNodeAnimation)animation;
+@end
+
 /**
 * Generic cell node.  Subclass this instead of `ASDisplayNode` to use with `ASTableView` and `ASCollectionView`.
 */
@@ -54,6 +71,18 @@ NS_ASSUME_NONNULL_BEGIN
 */
@property (nonatomic, assign) BOOL highlighted;

+/*
+ * A delegate to be notified (on main thread) after a relayout.
+ */
+@property (nonatomic, weak) id<ASCellNodeLayoutDelegate> layoutDelegate;
+
+/*
+ * A constant that is passed to the delegate to indicate how a relayout is to be animated.
+ * 
+ * @see UITableViewRowAnimation
+ */
+@property (nonatomic, assign) ASCellNodeAnimation relayoutAnimation;
+
 /*
 * ASCellNode must forward touch events in order for UITableView and UICollectionView tap handling to work. Overriding
 * these methods (e.g. for highlighting) requires the super method be called.
@@ -63,6 +92,17 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event ASDISPLAYNODE_REQUIRES_SUPER;
 - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event ASDISPLAYNODE_REQUIRES_SUPER;

+/**
+ * Marks the node as needing layout. Convenience for use whether the view / layer is loaded or not. Safe to call from a background thread.
+ *
+ * If this node was measured, calling this method triggers an internal relayout: the calculated layout is invalidated,
+ * and the supernode is notified or (if this node is the root one) a full measurement pass is executed using the old constrained size.
+ * The delegate will then be notified on main thread.
+ *
+ * This method can be called inside of an animation block (to animate all of the layout changes).
+ */
+- (void)setNeedsLayout;
+
@end


--- a/AsyncDisplayKit/ASCellNode.m
+++ b/AsyncDisplayKit/ASCellNode.m
@@ -8,6 +8,7 @@

 #import "ASCellNode.h"

+#import "ASInternalHelpers.h"
 #import <AsyncDisplayKit/_ASDisplayView.h>
 #import <AsyncDisplayKit/ASDisplayNode+Subclasses.h>
 #import <AsyncDisplayKit/ASTextNode.h>
@@ -27,6 +28,7 @@
  // use UITableViewCell defaults
  _selectionStyle = UITableViewCellSelectionStyleDefault;
  self.clipsToBounds = YES;
+  _relayoutAnimation = UITableViewRowAnimationAutomatic;

  return self;
 }
@@ -49,6 +51,18 @@
  ASDisplayNodeAssert(!layerBacked, @"ASCellNode does not support layer-backing.");
 }

+- (void)setNeedsLayout
+{
+  ASDisplayNodeAssertThreadAffinity(self);  
+  [super setNeedsLayout];
+  
+  if (_layoutDelegate != nil) {
+    ASPerformBlockOnMainThread(^{
+      [_layoutDelegate node:self didRelayoutWithSuggestedAnimation:_relayoutAnimation];
+    });
+  }
+}
+
 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
 {
  ASDisplayNodeAssertMainThread();
@@ -122,7 +136,7 @@ static const CGFloat kFontSize = 18.0f;
  _text = [text copy];
  _textNode.attributedString = [[NSAttributedString alloc] initWithString:_text
                                                               attributes:@{NSFontAttributeName: [UIFont systemFontOfSize:kFontSize]}];
-
+  [self setNeedsLayout];
 }

@end
--- a/AsyncDisplayKit/ASCollectionView.h
+++ b/AsyncDisplayKit/ASCollectionView.h
@@ -225,16 +225,6 @@ NS_ASSUME_NONNULL_BEGIN
 */
 - (void)reloadItemsAtIndexPaths:(NSArray<NSIndexPath *> *)indexPaths;

-/**
- * Relayouts the specified item.
- *
- * @param indexPath The index path identifying the item to relayout.
- *
- * @discussion This method must be called from the main thread. The relayout is excuted on main thread.
- * The node of the specified item must be updated to cause layout changes before this method is called.
- */
- (void)relayoutItemAtIndexPath:(NSIndexPath *)indexPath;
-
 /**
 * Moves the item at a specified location to a destination location.
 *
--- a/AsyncDisplayKit/ASCollectionView.mm
+++ b/AsyncDisplayKit/ASCollectionView.mm
@@ -12,7 +12,6 @@
 #import "ASCollectionViewLayoutController.h"
 #import "ASRangeController.h"
 #import "ASCollectionDataController.h"
-#import "ASDisplayNodeInternal.h"
 #import "ASBatchFetching.h"
 #import "UICollectionViewLayout+ASConvenience.h"
 #import "ASInternalHelpers.h"
@@ -131,7 +130,7 @@ static BOOL _isInterceptedSelector(SEL sel)
 #pragma mark -
 #pragma mark ASCollectionView.

-@interface ASCollectionView () <ASRangeControllerDelegate, ASDataControllerSource> {
+@interface ASCollectionView () <ASRangeControllerDelegate, ASDataControllerSource, ASCellNodeLayoutDelegate> {
  _ASCollectionViewProxy *_proxyDataSource;
  _ASCollectionViewProxy *_proxyDelegate;

@@ -269,7 +268,7 @@ static BOOL _isInterceptedSelector(SEL sel)
 - (void)reloadDataWithCompletion:(void (^)())completion
 {
  ASDisplayNodeAssert(self.asyncDelegate, @"ASCollectionView's asyncDelegate property must be set.");
-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    _superIsPendingDataLoad = YES;
    [super reloadData];
  });
@@ -458,14 +457,6 @@ static BOOL _isInterceptedSelector(SEL sel)
  [_dataController reloadRowsAtIndexPaths:indexPaths withAnimationOptions:kASCollectionViewAnimationNone];
 }

- (void)relayoutItemAtIndexPath:(NSIndexPath *)indexPath
-{
-  ASDisplayNodeAssertMainThread();
-  ASCellNode *node = [self nodeForItemAtIndexPath:indexPath];
-  [node setNeedsLayout];
-  [super reloadItemsAtIndexPaths:@[indexPath]];
-}
-
 - (void)moveItemAtIndexPath:(NSIndexPath *)indexPath toIndexPath:(NSIndexPath *)newIndexPath
 {
  ASDisplayNodeAssertMainThread();
@@ -664,6 +655,7 @@ static BOOL _isInterceptedSelector(SEL sel)
 {
  ASCellNode *node = [_asyncDataSource collectionView:self nodeForItemAtIndexPath:indexPath];
  ASDisplayNodeAssert([node isKindOfClass:ASCellNode.class], @"invalid node class, expected ASCellNode");
+  node.layoutDelegate = self;
  return node;
 }

@@ -790,25 +782,13 @@ static BOOL _isInterceptedSelector(SEL sel)
    return; // if the asyncDataSource has become invalid while we are processing, ignore this request to avoid crashes
  }
  
-  BOOL animationsEnabled = NO;
-
-  if (!animated) {
-    animationsEnabled = [UIView areAnimationsEnabled];
-    [UIView setAnimationsEnabled:NO];
-  }
-
-  [super performBatchUpdates:^{
-    [_batchUpdateBlocks enumerateObjectsUsingBlock:^(dispatch_block_t block, NSUInteger idx, BOOL *stop) {
-      block();
-    }];
-  } completion:^(BOOL finished) {
-    if (!animated) {
-      [UIView setAnimationsEnabled:animationsEnabled];
-    }
-    if (completion) {
-      completion(finished);
-    }
-  }];
+  ASPerformBlockWithoutAnimation(!animated, ^{
+    [super performBatchUpdates:^{
+      for (dispatch_block_t block in _batchUpdateBlocks) {
+        block();
+      }
+    } completion:completion];
+  });

  [_batchUpdateBlocks removeAllObjects];
  _performingBatchUpdates = NO;
@@ -907,4 +887,15 @@ static BOOL _isInterceptedSelector(SEL sel)
  }
 }

+#pragma mark - ASCellNodeDelegate
+
+- (void)node:(ASCellNode *)node didRelayoutWithSuggestedAnimation:(ASCellNodeAnimation)animation
+{
+  ASDisplayNodeAssertMainThread();
+  NSIndexPath *indexPath = [self indexPathForNode:node];
+  if (indexPath != nil) {
+    [super reloadItemsAtIndexPaths:@[indexPath]];
+  }
+}
+
@end
--- a/AsyncDisplayKit/ASDisplayNode.h
+++ b/AsyncDisplayKit/ASDisplayNode.h
@@ -561,14 +561,6 @@ typedef void (^ASDisplayNodeDidLoadBlock)(ASDisplayNode *node);
 * 
 * If this node was measured, calling this method triggers an internal relayout: the calculated layout is invalidated,
 * and the supernode is notified or (if this node is the root one) a full measurement pass is executed using the old constrained size.
- * 
- * Note: If the relayout causes a change in size of the root node that is attached to a container view, 
- * the container view must be notified to relayout. 
- * For ASTableView and ASCollectionView, instead of calling this method directly, 
- * it is recommended to call -relayoutRowAtIndexPath:withRowAnimation and -relayoutItemAtIndexPath: respectively.
- *
- * @see [ASTableView relayoutRowAtIndexPath:withRowAnimation:]
- * @see [ASCollectionView relayoutItemAtIndexPath:]
 */
 - (void)setNeedsLayout;

--- a/AsyncDisplayKit/ASDisplayNode.mm
+++ b/AsyncDisplayKit/ASDisplayNode.mm
@@ -57,17 +57,6 @@ BOOL ASDisplayNodeSubclassOverridesSelector(Class subclass, SEL selector)
    return ASSubclassOverridesSelector([ASDisplayNode class], subclass, selector);
 }

-void ASDisplayNodePerformBlockOnMainThread(void (^block)())
-{
-  if ([NSThread isMainThread]) {
-    block();
-  } else {
-    dispatch_async(dispatch_get_main_queue(), ^{
-      block();
-    });
-  }
-}
-
 void ASDisplayNodeRespectThreadAffinityOfNode(ASDisplayNode *node, void (^block)())
 {
  ASDisplayNodeCAssertNotNil(block, @"block is required");
@@ -79,7 +68,7 @@ void ASDisplayNodeRespectThreadAffinityOfNode(ASDisplayNode *node, void (^block)
    // Hold the lock to avoid a race where the node gets loaded while the block is in-flight.
    ASDN::MutexLocker l(node->_propertyLock);
    if (node.nodeLoaded) {
-      ASDisplayNodePerformBlockOnMainThread(^{
+      ASPerformBlockOnMainThread(^{
        block();
      });
    } else {
--- a/AsyncDisplayKit/ASEditableTextNode.h
+++ b/AsyncDisplayKit/ASEditableTextNode.h
@@ -60,6 +60,11 @@ NS_ASSUME_NONNULL_BEGIN
 //! @abstract The text input mode used by the receiver's keyboard, if it is visible. This value is undefined if the receiver is not the first responder.
@property (nonatomic, readonly) UITextInputMode *textInputMode;

+/*
+ @abstract The textContainerInset of both the placeholder and typed textView. This value defaults to UIEdgeInsetsZero.
+ */
+@property (nonatomic, readwrite) UIEdgeInsets textContainerInset;
+
 /*
 @abstract The returnKeyType of the keyboard. This value defaults to UIReturnKeyDefault.
 */
--- a/AsyncDisplayKit/ASEditableTextNode.mm
+++ b/AsyncDisplayKit/ASEditableTextNode.mm
@@ -78,6 +78,7 @@
  _textKitComponents.layoutManager.delegate = self;
  _wordKerner = [[ASTextNodeWordKerner alloc] init];
  _returnKeyType = UIReturnKeyDefault;
+  _textContainerInset = UIEdgeInsetsZero;
  
  // Create the placeholder scaffolding.
  _placeholderTextKitComponents = [ASTextKitComponents componentsWithAttributedSeedString:nil textContainerSize:CGSizeZero];
@@ -122,7 +123,7 @@
      textView.backgroundColor = nil;
      textView.opaque = NO;
    }
-    textView.textContainerInset = UIEdgeInsetsZero;
+    textView.textContainerInset = self.textContainerInset;
    textView.clipsToBounds = NO; // We don't want selection handles cut off.
  };

@@ -175,6 +176,15 @@
  _placeholderTextKitComponents.textView.backgroundColor = backgroundColor;
 }

+- (void)setTextContainerInset:(UIEdgeInsets)textContainerInset
+{
+  ASDN::MutexLocker l(_textKitLock);
+
+  _textContainerInset = textContainerInset;
+  _textKitComponents.textView.textContainerInset = textContainerInset;
+  _placeholderTextKitComponents.textView.textContainerInset = textContainerInset;
+}
+
 - (void)setOpaque:(BOOL)opaque
 {
  [super setOpaque:opaque];
--- a/AsyncDisplayKit/ASImageNode.mm
+++ b/AsyncDisplayKit/ASImageNode.mm
@@ -128,7 +128,7 @@
    _image = image;

    ASDN::MutexUnlocker u(_imageLock);
-    ASDisplayNodePerformBlockOnMainThread(^{
+    ASPerformBlockOnMainThread(^{
      [self invalidateCalculatedLayout];
      [self setNeedsDisplay];
    });
@@ -306,7 +306,7 @@
  // If we have an image to display, display it, respecting our recrop flag.
  if (self.image)
  {
-    ASDisplayNodePerformBlockOnMainThread(^{
+    ASPerformBlockOnMainThread(^{
      if (recropImmediately)
        [self displayImmediately];
      else
@@ -334,7 +334,7 @@
  BOOL isCroppingImage = ((boundsSize.width < imageSize.width) || (boundsSize.height < imageSize.height));

  // Re-display if we need to.
-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    if (self.nodeLoaded && self.contentMode == UIViewContentModeScaleAspectFill && isCroppingImage)
      [self setNeedsDisplay];
  });
--- a/AsyncDisplayKit/ASNetworkImageNode.h
+++ b/AsyncDisplayKit/ASNetworkImageNode.h
@@ -24,10 +24,10 @@ NS_ASSUME_NONNULL_BEGIN
@interface ASNetworkImageNode : ASImageNode

 /**
- * The designated initializer.
+ * The designated initializer.  Cache and Downloader are WEAK references.
 *
- * @param cache The object that implements a cache of images for the image node.
- * @param downloader The object that implements image downloading for the image node.  Must not be nil.
+ * @param cache The object that implements a cache of images for the image node.  Weak reference.
+ * @param downloader The object that implements image downloading for the image node.  Must not be nil.  Weak reference.
 *
 * @discussion If `cache` is nil, the receiver will not attempt to retrieve images from a cache before downloading them.
 *
--- a/AsyncDisplayKit/ASNetworkImageNode.mm
+++ b/AsyncDisplayKit/ASNetworkImageNode.mm
@@ -16,8 +16,8 @@
@interface ASNetworkImageNode ()
 {
  ASDN::RecursiveMutex _lock;
-  id<ASImageCacheProtocol> _cache;
-  id<ASImageDownloaderProtocol> _downloader;
+  __weak id<ASImageCacheProtocol> _cache;
+  __weak id<ASImageDownloaderProtocol> _downloader;

  // Only access any of these with _lock.
  __weak id<ASNetworkImageNodeDelegate> _delegate;
@@ -51,7 +51,7 @@

 - (instancetype)init
 {
-  return [self initWithCache:nil downloader:[[ASBasicImageDownloader alloc] init]];
+  return [self initWithCache:nil downloader:[ASBasicImageDownloader sharedImageDownloader]];
 }

 - (void)dealloc
--- a/AsyncDisplayKit/ASTableView.h
+++ b/AsyncDisplayKit/ASTableView.h
@@ -215,18 +215,6 @@ NS_ASSUME_NONNULL_BEGIN
 */
 - (void)reloadRowsAtIndexPaths:(NSArray<NSIndexPath *> *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation;

-/**
- * Relayouts the specified row using a given animation effect.
- *
- * @param indexPath The index path identifying the row to relayout.
- *
- * @param animation A constant that indicates how the relayout is to be animated. See UITableViewRowAnimation.
- *
- * @discussion This method must be called from the main thread. The relayout is excuted on main thread. 
- * The node of the specified row must be updated to cause layout changes before this method is called.
- */
- (void)relayoutRowAtIndexPath:(NSIndexPath *)indexPath withRowAnimation:(UITableViewRowAnimation)animation;
-
 /**
 * Moves the row at a specified location to a destination location.
 *
@@ -255,7 +243,7 @@ NS_ASSUME_NONNULL_BEGIN
 *
 * @returns an indexPath for this cellNode
 */
- (NSIndexPath *)indexPathForNode:(ASCellNode *)cellNode;
+- (nullable NSIndexPath *)indexPathForNode:(ASCellNode *)cellNode;

 /**
 * Similar to -visibleCells.
--- a/AsyncDisplayKit/ASTableView.mm
+++ b/AsyncDisplayKit/ASTableView.mm
@@ -14,7 +14,6 @@
 #import "ASCollectionViewLayoutController.h"
 #import "ASLayoutController.h"
 #import "ASRangeController.h"
-#import "ASDisplayNodeInternal.h"
 #import "ASBatchFetching.h"
 #import "ASInternalHelpers.h"
 #import "ASLayout.h"
@@ -152,7 +151,7 @@ static BOOL _isInterceptedSelector(SEL sel)
 #pragma mark -
 #pragma mark ASTableView

-@interface ASTableView () <ASRangeControllerDelegate, ASDataControllerSource, _ASTableViewCellDelegate> {
+@interface ASTableView () <ASRangeControllerDelegate, ASDataControllerSource, _ASTableViewCellDelegate, ASCellNodeLayoutDelegate> {
  _ASTableViewProxy *_proxyDataSource;
  _ASTableViewProxy *_proxyDelegate;

@@ -180,26 +179,6 @@ static BOOL _isInterceptedSelector(SEL sel)

@implementation ASTableView

-/**
- @summary Conditionally performs UIView geometry changes in the given block without animation.
- 
- Used primarily to circumvent UITableView forcing insertion animations when explicitly told not to via
- `UITableViewRowAnimationNone`. More info: https://github.com/facebook/AsyncDisplayKit/pull/445
- 
- @param withoutAnimation Set to `YES` to perform given block without animation
- @param block Perform UIView geometry changes within the passed block
- */
-void ASPerformBlockWithoutAnimation(BOOL withoutAnimation, void (^block)()) {
-  if (withoutAnimation) {
-    BOOL animationsEnabled = [UIView areAnimationsEnabled];
-    [UIView setAnimationsEnabled:NO];
-    block();
-    [UIView setAnimationsEnabled:animationsEnabled];
-  } else {
-    block();
-  }
-}
-
 + (Class)dataControllerClass
 {
  return [ASChangeSetDataController class];
@@ -334,7 +313,7 @@ void ASPerformBlockWithoutAnimation(BOOL withoutAnimation, void (^block)()) {
 - (void)reloadDataWithCompletion:(void (^)())completion
 {
  ASDisplayNodeAssert(self.asyncDelegate, @"ASTableView's asyncDelegate property must be set.");
-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    [super reloadData];
  });
  [_dataController reloadDataWithAnimationOptions:UITableViewRowAnimationNone completion:completion];
@@ -477,14 +456,6 @@ void ASPerformBlockWithoutAnimation(BOOL withoutAnimation, void (^block)()) {
  [_dataController reloadRowsAtIndexPaths:indexPaths withAnimationOptions:animation];
 }

- (void)relayoutRowAtIndexPath:(NSIndexPath *)indexPath withRowAnimation:(UITableViewRowAnimation)animation
-{
-  ASDisplayNodeAssertMainThread();
-  ASCellNode *node = [self nodeForRowAtIndexPath:indexPath];
-  [node setNeedsLayout];
-  [super reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:animation];
-}
-
 - (void)moveRowAtIndexPath:(NSIndexPath *)indexPath toIndexPath:(NSIndexPath *)newIndexPath
 {
  ASDisplayNodeAssertMainThread();
@@ -849,6 +820,7 @@ void ASPerformBlockWithoutAnimation(BOOL withoutAnimation, void (^block)()) {
 {
  ASCellNode *node = [_asyncDataSource tableView:self nodeForRowAtIndexPath:indexPath];
  ASDisplayNodeAssert([node isKindOfClass:ASCellNode.class], @"invalid node class, expected ASCellNode");
+  node.layoutDelegate = self;
  return node;
 }

@@ -923,4 +895,15 @@ void ASPerformBlockWithoutAnimation(BOOL withoutAnimation, void (^block)()) {
  }
 }

+#pragma mark - ASCellNodeDelegate
+
+- (void)node:(ASCellNode *)node didRelayoutWithSuggestedAnimation:(ASCellNodeAnimation)animation
+{
+  ASDisplayNodeAssertMainThread();
+  NSIndexPath *indexPath = [self indexPathForNode:node];
+  if (indexPath != nil) {
+    [super reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:(UITableViewRowAnimation)animation];
+  }
+}
+
@end
--- a/AsyncDisplayKit/ASTextNode.h
+++ b/AsyncDisplayKit/ASTextNode.h
@@ -81,6 +81,15 @@ typedef NS_ENUM(NSUInteger, ASTextNodeHighlightStyle) {

 #pragma mark - Placeholders

+/**
+ * @abstract ASTextNode has a special placeholder behavior when placeholderEnabled is YES.
+ *
+ * @discussion Defaults to NO.  When YES, it draws rectangles for each line of text,
+ * following the true shape of the text's wrapping.  This visually mirrors the overall
+ * shape and weight of paragraphs, making the appearance of the finished text less jarring.
+ */
+@property (nonatomic, assign) BOOL placeholderEnabled;
+
 /**
 @abstract The placeholder color.
 */
--- a/AsyncDisplayKit/ASTextNode.mm
+++ b/AsyncDisplayKit/ASTextNode.mm
@@ -96,6 +96,7 @@ static NSString *ASTextNodeTruncationTokenAttributeName = @"ASTextNodeTruncation

  UILongPressGestureRecognizer *_longPressGestureRecognizer;
 }
+@dynamic placeholderEnabled;

 #pragma mark - NSObject

@@ -131,7 +132,8 @@ static NSString *ASTextNodeTruncationTokenAttributeName = @"ASTextNodeTruncation
    _constrainedSize = CGSizeMake(-INFINITY, -INFINITY);

    // Placeholders
-    self.placeholderEnabled = YES;
+    // Disabled by default in ASDisplayNode, but add a few options for those who toggle
+    // on the special placeholder behavior of ASTextNode.
    _placeholderColor = ASDisplayNodeDefaultPlaceholderColor();
    _placeholderInsets = UIEdgeInsetsMake(1.0, 0.0, 1.0, 0.0);
  }
@@ -747,6 +749,8 @@ static NSString *ASTextNodeTruncationTokenAttributeName = @"ASTextNodeTruncation

 - (UIImage *)placeholderImage
 {
+  // FIXME: Replace this implementation with reusable CALayers that have .backgroundColor set.
+  // This would completely eliminate the memory and performance cost of the backing store.
  CGSize size = self.calculatedSize;
  UIGraphicsBeginImageContext(size);
  [self.placeholderColor setFill];
--- a/AsyncDisplayKit/ASViewController.h
+++ b/AsyncDisplayKit/ASViewController.h
@@ -22,6 +22,15 @@ NS_ASSUME_NONNULL_BEGIN

 - (instancetype)initWithNode:(ASDisplayNode *)node;

+/**
+ * The constrained size used to measure the backing node.
+ *
+ * @discussion Defaults to providing a size range that uses the view controller view's bounds as
+ * both the min and max definitions. Override this method to provide a custom size range to the
+ * backing node.
+ */
+- (ASSizeRange)nodeConstrainedSize;
+
@end

 NS_ASSUME_NONNULL_END
--- a/AsyncDisplayKit/ASViewController.m
+++ b/AsyncDisplayKit/ASViewController.m
@@ -40,9 +40,7 @@
 - (void)viewWillLayoutSubviews
 {
  [super viewWillLayoutSubviews];
-  CGSize viewSize = self.view.bounds.size;
-  ASSizeRange constrainedSize = ASSizeRangeMake(viewSize, viewSize);
-  [_node measureWithSizeRange:constrainedSize];
+  [_node measureWithSizeRange:[self nodeConstrainedSize]];
 }

 - (void)viewDidLayoutSubviews
@@ -61,4 +59,12 @@
  [_node recursivelyFetchData];
 }

+// MARK: - Layout Helpers
+
+- (ASSizeRange)nodeConstrainedSize
+{
+  CGSize viewSize = self.view.bounds.size;
+  return ASSizeRangeMake(viewSize, viewSize);
+}
+
@end
--- a/AsyncDisplayKit/AsyncDisplayKit.h
+++ b/AsyncDisplayKit/AsyncDisplayKit.h
@@ -12,6 +12,7 @@
 #import <AsyncDisplayKit/ASControlNode.h>
 #import <AsyncDisplayKit/ASImageNode.h>
 #import <AsyncDisplayKit/ASTextNode.h>
+#import <AsyncDisplayKit/ASButtonNode.h>

 #import <AsyncDisplayKit/ASEditableTextNode.h>

--- a/AsyncDisplayKit/Details/ASBasicImageDownloader.h
+++ b/AsyncDisplayKit/Details/ASBasicImageDownloader.h
@@ -15,6 +15,8 @@ NS_ASSUME_NONNULL_BEGIN
 */
@interface ASBasicImageDownloader : NSObject <ASImageDownloaderProtocol>

+ (instancetype)sharedImageDownloader;
+
@end

 NS_ASSUME_NONNULL_END
--- a/AsyncDisplayKit/Details/ASBasicImageDownloader.mm
+++ b/AsyncDisplayKit/Details/ASBasicImageDownloader.mm
@@ -200,6 +200,16 @@ static const char *kContextKey = NSStringFromClass(ASBasicImageDownloaderContext

@implementation ASBasicImageDownloader

+ (instancetype)sharedImageDownloader
+{
+  static ASBasicImageDownloader *sharedImageDownloader = nil;
+  static dispatch_once_t once = 0;
+  dispatch_once(&once, ^{
+    sharedImageDownloader = [[ASBasicImageDownloader alloc] init];
+  });
+  return sharedImageDownloader;
+}
+
 #pragma mark Lifecycle.

 - (instancetype)init
--- a/AsyncDisplayKit/Details/ASDataController.mm
+++ b/AsyncDisplayKit/Details/ASDataController.mm
@@ -14,7 +14,7 @@
 #import "ASCellNode.h"
 #import "ASDisplayNode.h"
 #import "ASMultidimensionalArrayUtils.h"
-#import "ASDisplayNodeInternal.h"
+#import "ASInternalHelpers.h"
 #import "ASLayout.h"

 //#define LOG(...) NSLog(__VA_ARGS__)
@@ -208,7 +208,7 @@ static void *kASSizingQueueContext = &kASSizingQueueContext;
  // Deep copy is critical here, or future edits to the sub-arrays will pollute state between _editing and _complete on different threads.
  NSMutableArray *completedNodes = (NSMutableArray *)ASMultidimensionalArrayDeepMutableCopy(editingNodes);
  
-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    _completedNodes[kind] = completedNodes;
    if (completionBlock) {
      completionBlock(nodes, indexPaths);
@@ -227,7 +227,7 @@ static void *kASSizingQueueContext = &kASSizingQueueContext;
  ASDeleteElementsInMultidimensionalArrayAtIndexPaths(editingNodes, indexPaths);
  _editingNodes[kind] = editingNodes;

-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    NSArray *nodes = ASFindElementsInMultidimensionalArrayAtIndexPaths(_completedNodes[kind], indexPaths);
    ASDeleteElementsInMultidimensionalArrayAtIndexPaths(_completedNodes[kind], indexPaths);
    if (completionBlock) {
@@ -250,7 +250,7 @@ static void *kASSizingQueueContext = &kASSizingQueueContext;
  // Deep copy is critical here, or future edits to the sub-arrays will pollute state between _editing and _complete on different threads.
  NSArray *sectionsForCompleted = (NSMutableArray *)ASMultidimensionalArrayDeepMutableCopy(sections);
  
-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    [_completedNodes[kind] insertObjects:sectionsForCompleted atIndexes:indexSet];
    if (completionBlock) {
      completionBlock(sections, indexSet);
@@ -263,7 +263,7 @@ static void *kASSizingQueueContext = &kASSizingQueueContext;
  if (indexSet.count == 0)
    return;
  [_editingNodes[kind] removeObjectsAtIndexes:indexSet];
-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    [_completedNodes[kind] removeObjectsAtIndexes:indexSet];
    if (completionBlock) {
      completionBlock(indexSet);
@@ -512,7 +512,7 @@ static void *kASSizingQueueContext = &kASSizingQueueContext;
    LOG(@"endUpdatesWithCompletion - beginning");

    [_editingTransactionQueue addOperationWithBlock:^{
-      ASDisplayNodePerformBlockOnMainThread(^{
+      ASPerformBlockOnMainThread(^{
        // Deep copy _completedNodes to _externalCompletedNodes.
        // Any external queries from now on will be done on _externalCompletedNodes, to guarantee data consistency with the delegate.
        _externalCompletedNodes = (NSMutableArray *)ASMultidimensionalArrayDeepMutableCopy(_completedNodes[ASDataControllerRowNodeKind]);
@@ -532,7 +532,7 @@ static void *kASSizingQueueContext = &kASSizingQueueContext;
    [_pendingEditCommandBlocks removeAllObjects];
    
    [_editingTransactionQueue addOperationWithBlock:^{
-      ASDisplayNodePerformBlockOnMainThread(^{
+      ASPerformBlockOnMainThread(^{
        // Now that the transaction is done, _completedNodes can be accessed externally again.
        _externalCompletedNodes = nil;
        
@@ -819,7 +819,7 @@ static void *kASSizingQueueContext = &kASSizingQueueContext;
    // i.e there might be some nodes that were measured using the old constrained size but haven't been added to _completedNodes
    // (see _layoutNodes:atIndexPaths:withAnimationOptions:).
    [_editingTransactionQueue addOperationWithBlock:^{
-      ASDisplayNodePerformBlockOnMainThread(^{
+      ASPerformBlockOnMainThread(^{
        for (NSString *kind in [_completedNodes keyEnumerator]) {
          [self _relayoutNodesOfKind:kind];
        }
--- a/AsyncDisplayKit/Details/ASRangeController.mm
+++ b/AsyncDisplayKit/Details/ASRangeController.mm
@@ -10,10 +10,10 @@

 #import "ASAssert.h"
 #import "ASDisplayNodeExtras.h"
-#import "ASDisplayNodeInternal.h"
 #import "ASMultiDimensionalArrayUtils.h"
 #import "ASRangeHandlerRender.h"
 #import "ASRangeHandlerPreload.h"
+#import "ASInternalHelpers.h"

@interface ASRangeController () {
  BOOL _rangeIsValid;
@@ -177,13 +177,13 @@
 #pragma mark - ASDataControllerDelegete

 - (void)dataControllerBeginUpdates:(ASDataController *)dataController {
-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    [_delegate rangeControllerBeginUpdates:self];
  });
 }

 - (void)dataController:(ASDataController *)dataController endUpdatesAnimated:(BOOL)animated completion:(void (^)(BOOL))completion {
-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    [_delegate rangeController:self endUpdatesAnimated:animated completion:completion];
  });
 }
@@ -196,14 +196,14 @@
    [nodeSizes addObject:[NSValue valueWithCGSize:node.calculatedSize]];
  }];

-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    _rangeIsValid = NO;
    [_delegate rangeController:self didInsertNodes:nodes atIndexPaths:indexPaths withAnimationOptions:animationOptions];
  });
 }

 - (void)dataController:(ASDataController *)dataController didDeleteNodes:(NSArray *)nodes atIndexPaths:(NSArray *)indexPaths withAnimationOptions:(ASDataControllerAnimationOptions)animationOptions {
-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    _rangeIsValid = NO;
    [_delegate rangeController:self didDeleteNodes:nodes atIndexPaths:indexPaths withAnimationOptions:animationOptions];
  });
@@ -222,14 +222,14 @@
    [sectionNodeSizes addObject:nodeSizes];
  }];

-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    _rangeIsValid = NO;
    [_delegate rangeController:self didInsertSectionsAtIndexSet:indexSet withAnimationOptions:animationOptions];
  });
 }

 - (void)dataController:(ASDataController *)dataController didDeleteSectionsAtIndexSet:(NSIndexSet *)indexSet withAnimationOptions:(ASDataControllerAnimationOptions)animationOptions {
-  ASDisplayNodePerformBlockOnMainThread(^{
+  ASPerformBlockOnMainThread(^{
    _rangeIsValid = NO;
    [_delegate rangeController:self didDeleteSectionsAtIndexSet:indexSet withAnimationOptions:animationOptions];
  });
--- a/AsyncDisplayKit/Layout/ASStackLayoutSpec.h
+++ b/AsyncDisplayKit/Layout/ASStackLayoutSpec.h
@@ -58,6 +58,16 @@ NS_ASSUME_NONNULL_BEGIN
 */
 + (instancetype)stackLayoutSpecWithDirection:(ASStackLayoutDirection)direction spacing:(CGFloat)spacing justifyContent:(ASStackLayoutJustifyContent)justifyContent alignItems:(ASStackLayoutAlignItems)alignItems children:(NSArray<id<ASLayoutable>> *)children;

+/**
+ * @return A stack layout spec with direction of ASStackLayoutDirectionVertical
+ **/
+ (instancetype)verticalStackLayoutSpec;
+
+/**
+ * @return A stack layout spec with direction of ASStackLayoutDirectionHorizontal
+ **/
+ (instancetype)horizontalStackLayoutSpec;
+
@end

 NS_ASSUME_NONNULL_END
--- a/AsyncDisplayKit/Layout/ASStackLayoutSpec.mm
+++ b/AsyncDisplayKit/Layout/ASStackLayoutSpec.mm
@@ -38,6 +38,20 @@
  return [[self alloc] initWithDirection:direction spacing:spacing justifyContent:justifyContent alignItems:alignItems children:children];
 }

+ (instancetype)verticalStackLayoutSpec
+{
+  ASStackLayoutSpec *stackLayoutSpec = [[self alloc] init];
+  stackLayoutSpec.direction = ASStackLayoutDirectionVertical;
+  return stackLayoutSpec;
+}
+
+ (instancetype)horizontalStackLayoutSpec
+{
+  ASStackLayoutSpec *stackLayoutSpec = [[self alloc] init];
+  stackLayoutSpec.direction = ASStackLayoutDirectionHorizontal;
+  return stackLayoutSpec;
+}
+
 - (instancetype)initWithDirection:(ASStackLayoutDirection)direction spacing:(CGFloat)spacing justifyContent:(ASStackLayoutJustifyContent)justifyContent alignItems:(ASStackLayoutAlignItems)alignItems children:(NSArray *)children
 {
  if (!(self = [super init])) {
--- a/AsyncDisplayKit/Private/ASDisplayNode+UIViewBridge.mm
+++ b/AsyncDisplayKit/Private/ASDisplayNode+UIViewBridge.mm
@@ -85,7 +85,7 @@
  return _getFromLayer(cornerRadius);
 }

-(void)setCornerRadius:(CGFloat)newCornerRadius
+- (void)setCornerRadius:(CGFloat)newCornerRadius
 {
  _bridge_prologue;
  _setToLayer(cornerRadius, newCornerRadius);
--- a/AsyncDisplayKit/Private/ASDisplayNodeInternal.h
+++ b/AsyncDisplayKit/Private/ASDisplayNodeInternal.h
@@ -20,7 +20,6 @@
 #import "ASLayoutOptions.h"

 BOOL ASDisplayNodeSubclassOverridesSelector(Class subclass, SEL selector);
-void ASDisplayNodePerformBlockOnMainThread(void (^block)());
 void ASDisplayNodeRespectThreadAffinityOfNode(ASDisplayNode *node, void (^block)());

 typedef NS_OPTIONS(NSUInteger, ASDisplayNodeMethodOverrides) {
--- a/AsyncDisplayKit/Private/ASInternalHelpers.h
+++ b/AsyncDisplayKit/Private/ASInternalHelpers.h
@@ -10,12 +10,14 @@

 #include <CoreGraphics/CGBase.h>
 #import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
 #import "ASBaseDefines.h"

 ASDISPLAYNODE_EXTERN_C_BEGIN

 BOOL ASSubclassOverridesSelector(Class superclass, Class subclass, SEL selector);
 BOOL ASSubclassOverridesClassSelector(Class superclass, Class subclass, SEL selector);
+void ASPerformBlockOnMainThread(void (^block)());

 CGFloat ASScreenScale();

@@ -27,6 +29,23 @@ CGFloat ASRoundPixelValue(CGFloat f);

 ASDISPLAYNODE_EXTERN_C_END

+/**
+ @summary Conditionally performs UIView geometry changes in the given block without animation.
+ 
+ Used primarily to circumvent UITableView forcing insertion animations when explicitly told not to via
+ `UITableViewRowAnimationNone`. More info: https://github.com/facebook/AsyncDisplayKit/pull/445
+ 
+ @param withoutAnimation Set to `YES` to perform given block without animation
+ @param block Perform UIView geometry changes within the passed block
+ */
+ASDISPLAYNODE_INLINE void ASPerformBlockWithoutAnimation(BOOL withoutAnimation, void (^block)()) {
+  if (withoutAnimation) {
+    [UIView performWithoutAnimation:block];
+  } else {
+    block();
+  }
+}
+
@interface NSIndexPath (ASInverseComparison)
 - (NSComparisonResult)asdk_inverseCompare:(NSIndexPath *)otherIndexPath;
@end
--- a/AsyncDisplayKit/Private/ASInternalHelpers.mm
+++ b/AsyncDisplayKit/Private/ASInternalHelpers.mm
@@ -46,6 +46,17 @@ static void ASDispatchOnceOnMainThread(dispatch_once_t *predicate, dispatch_bloc
  }
 }

+void ASPerformBlockOnMainThread(void (^block)())
+{
+  if ([NSThread isMainThread]) {
+    block();
+  } else {
+    dispatch_async(dispatch_get_main_queue(), ^{
+      block();
+    });
+  }
+}
+
 CGFloat ASScreenScale()
 {
  static CGFloat _scale;
--- a/examples/Kittens/Sample/KittenNode.mm
+++ b/examples/Kittens/Sample/KittenNode.mm
@@ -185,22 +185,13 @@ static const CGFloat kInnerPadding = 10.0f;
 - (void)toggleImageEnlargement
 {
  _isImageEnlarged = !_isImageEnlarged;
+  [self setNeedsLayout];
 }

 - (void)toggleNodesSwap
 {
  _swappedTextAndImage = !_swappedTextAndImage;
-  
-  [UIView animateWithDuration:0.15 animations:^{
-    self.alpha = 0;
-  } completion:^(BOOL finished) {
-    [self setNeedsLayout];
-    [self.view layoutIfNeeded];
-    
-    [UIView animateWithDuration:0.15 animations:^{
-      self.alpha = 1;
-    }];
-  }];
+  [self setNeedsLayout];
 }

@end
--- a/examples/Kittens/Sample/ViewController.m
+++ b/examples/Kittens/Sample/ViewController.m
@@ -121,7 +121,6 @@ static const NSInteger kMaxLitterSize = 100;        // max number of kitten cell
  // Assume only kitten nodes are selectable (see -tableView:shouldHighlightRowAtIndexPath:).
  KittenNode *node = (KittenNode *)[_tableView nodeForRowAtIndexPath:indexPath];
  [node toggleImageEnlargement];
-  [_tableView relayoutRowAtIndexPath:indexPath withRowAnimation:UITableViewRowAnimationAutomatic];
 }

 - (ASCellNode *)tableView:(ASTableView *)tableView nodeForRowAtIndexPath:(NSIndexPath *)indexPath
@@ -166,8 +165,6 @@ static const NSInteger kMaxLitterSize = 100;        // max number of kitten cell

 - (void)tableView:(UITableView *)tableView willBeginBatchFetchWithContext:(ASBatchContext *)context
 {
-  NSLog(@"adding kitties");
-    
  dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    sleep(1);
    dispatch_async(dispatch_get_main_queue(), ^{
@@ -189,8 +186,6 @@ static const NSInteger kMaxLitterSize = 100;        // max number of kitten cell
      [tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];

      [context completeBatchFetching:YES];
-
-      NSLog(@"kittens added");
    });
  });
 }
--- a/examples/Multiplex/Sample.xcodeproj/project.pbxproj
+++ b/examples/Multiplex/Sample.xcodeproj/project.pbxproj
@@ -123,6 +123,7 @@
 				05E2127E19D4DB510098F589 /* Frameworks */,
 				05E2127F19D4DB510098F589 /* Resources */,
 				F012A6F39E0149F18F564F50 /* Copy Pods Resources */,
+				93B7780A33739EF25F20366B /* Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -179,6 +180,21 @@
 /* End PBXResourcesBuildPhase section */

 /* Begin PBXShellScriptBuildPhase section */
+		93B7780A33739EF25F20366B /* Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Embed Pods Frameworks";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods/Pods-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 		E080B80F89C34A25B3488E26 /* Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
--- a/examples/Multiplex/Sample/ScreenNode.h
+++ b/examples/Multiplex/Sample/ScreenNode.h
@@ -11,7 +11,7 @@
@interface ScreenNode : ASDisplayNode

@property (nonatomic, strong) ASMultiplexImageNode *imageNode;
-@property (nonatomic, strong) ASTextNode *textNode;
+@property (nonatomic, strong) ASButtonNode *buttonNode;

 - (void)start;
 - (void)reload;
--- a/examples/Multiplex/Sample/ScreenNode.m
+++ b/examples/Multiplex/Sample/ScreenNode.m
@@ -31,11 +31,13 @@
  // load low-quality images before high-quality images
  _imageNode.downloadsIntermediateImages = YES;
  
-  // simple status label
-  _textNode = [[ASTextNode alloc] init];
+  // simple status label.  Synchronous to avoid flicker / placeholder state when updating.
+  _buttonNode = [[ASButtonNode alloc] init];
+  [_buttonNode addTarget:self action:@selector(reload) forControlEvents:ASControlNodeEventTouchUpInside];
+  _buttonNode.titleNode.displaysAsynchronously = NO;
  
  [self addSubnode:_imageNode];
-  [self addSubnode:_textNode];
+  [self addSubnode:_buttonNode];
  
  return self;
 }
@@ -43,11 +45,12 @@
 - (void)start
 {
  [self setText:@"loading…"];
-  _textNode.userInteractionEnabled = NO;
+  _buttonNode.userInteractionEnabled = NO;
  _imageNode.imageIdentifiers = @[ @"best", @"medium", @"worst" ]; // go!
 }

- (void)reload {
+- (void)reload
+{
  [self start];
  [_imageNode reloadImageIdentifierSources];
 }
@@ -57,18 +60,21 @@
  NSDictionary *attributes = @{NSFontAttributeName: [UIFont fontWithName:@"HelveticaNeue-Light" size:22.0f]};
  NSAttributedString *string = [[NSAttributedString alloc] initWithString:text
                                                               attributes:attributes];
-  _textNode.attributedString = string;
+  [_buttonNode setAttributedTitle:string forState:ASButtonStateNormal];
  [self setNeedsLayout];
 }

 - (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
 {
  ASRatioLayoutSpec *imagePlaceholder = [ASRatioLayoutSpec ratioLayoutSpecWithRatio:1 child:_imageNode];
-  ASStackLayoutSpec *verticalStack = [ASStackLayoutSpec stackLayoutSpecWithDirection:ASStackLayoutDirectionVertical
-                                                                             spacing:10
-                                                                      justifyContent:ASStackLayoutJustifyContentCenter
-                                                                          alignItems:ASStackLayoutAlignItemsCenter
-                                                                            children:@[imagePlaceholder, _textNode]];
+  
+  ASStackLayoutSpec *verticalStack = [[ASStackLayoutSpec alloc] init];
+  verticalStack.direction = ASStackLayoutDirectionVertical;
+  verticalStack.spacing = 10;
+  verticalStack.justifyContent = ASStackLayoutJustifyContentCenter;
+  verticalStack.alignItems = ASStackLayoutAlignItemsCenter;
+  verticalStack.children = @[imagePlaceholder, _buttonNode];
+                                      
  return [ASInsetLayoutSpec insetLayoutSpecWithInsets:UIEdgeInsetsMake(10, 10, 10, 10) child:verticalStack];
 }

@@ -98,8 +104,8 @@
  [self setText:[NSString stringWithFormat:@"loaded '%@'", imageIdentifier]];
  
  if ([imageIdentifier isEqualToString:@"best"]) {
-    [self setText:[_textNode.attributedString.string stringByAppendingString:@".  tap to reload"]];
-    _textNode.userInteractionEnabled = YES;
+    [self setText:[_buttonNode.titleNode.attributedString.string stringByAppendingString:@".  tap to reload"]];
+    _buttonNode.userInteractionEnabled = YES;
  }
 }

--- a/examples/Multiplex/Sample/ViewController.m
+++ b/examples/Multiplex/Sample/ViewController.m
@@ -12,7 +12,8 @@
 #import "ViewController.h"
 #import "ScreenNode.h"

-@interface ViewController() {
+@interface ViewController()
+{
  ScreenNode *_screenNode;
 }

@@ -28,10 +29,6 @@

  _screenNode = node;

-  // tap to reload
-  UITapGestureRecognizer *gr = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(reload:)];
-  [_screenNode.textNode.view addGestureRecognizer:gr];
-
  return self;
 }

@@ -42,10 +39,6 @@
  [super viewWillAppear:animated];
 }

- (void)reload:(id)sender {
-  [_screenNode reload];
-}
-
 - (BOOL)prefersStatusBarHidden
 {
  return YES;