Beef up the properties, beef up the demo app

AsyncDisplayKit/ASCellNode.m

@@ -94,13 +94,12 @@
 
 - (void)setNeedsLayout
 {
-  ASDisplayNodeAssertThreadAffinity(self);  
   CGSize oldSize = self.calculatedSize;
   [super setNeedsLayout];
 
   if (_layoutDelegate != nil && self.isNodeLoaded) {
-    BOOL sizeChanged = !CGSizeEqualToSize(oldSize, self.calculatedSize);
     ASPerformBlockOnMainThread(^{
+      BOOL sizeChanged = !CGSizeEqualToSize(oldSize, self.calculatedSize);
       [_layoutDelegate nodeDidRelayout:self sizeChanged:sizeChanged];
     });
   }

AsyncDisplayKit/ASDisplayNode.mm

@@ -628,7 +628,6 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c)
 
 - (ASLayout *)measureWithSizeRange:(ASSizeRange)constrainedSize completion:(void(^)())completion
 {
-  ASDisplayNodeAssertThreadAffinity(self);
   ASDN::MutexLocker l(_propertyLock);
   if (![self __shouldSize])
     return nil;
@@ -1868,7 +1867,7 @@ void recursivelyTriggerDisplayForLayer(CALayer *layer, BOOL shouldBlock)
 
 - (ASLayout *)calculateLayoutThatFits:(ASSizeRange)constrainedSize
 {
-  ASDisplayNodeAssertThreadAffinity(self);
+  ASDN::MutexLocker l(_propertyLock);
   if (_methodOverrides & ASDisplayNodeMethodOverrideLayoutSpecThatFits) {
     ASLayoutSpec *layoutSpec = [self layoutSpecThatFits:constrainedSize];
     layoutSpec.isMutable = NO;
@@ -1895,25 +1894,25 @@ void recursivelyTriggerDisplayForLayer(CALayer *layer, BOOL shouldBlock)
 
 - (CGSize)calculateSizeThatFits:(CGSize)constrainedSize
 {
-  ASDisplayNodeAssertThreadAffinity(self);
+  ASDN::MutexLocker l(_propertyLock);
   return _preferredFrameSize;
 }
 
 - (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
 {
-  ASDisplayNodeAssertThreadAffinity(self);
+  ASDN::MutexLocker l(_propertyLock);
   return nil;
 }
 
 - (ASLayout *)calculatedLayout
 {
-  ASDisplayNodeAssertThreadAffinity(self);
+  ASDN::MutexLocker l(_propertyLock);
   return _layout;
 }
 
 - (CGSize)calculatedSize
 {
-  ASDisplayNodeAssertThreadAffinity(self);
+  ASDN::MutexLocker l(_propertyLock);
   return _layout.size;
 }
 
@@ -1944,7 +1943,7 @@ void recursivelyTriggerDisplayForLayer(CALayer *layer, BOOL shouldBlock)
 
 - (void)invalidateCalculatedLayout
 {
-  ASDisplayNodeAssertThreadAffinity(self);
+  ASDN::MutexLocker l(_propertyLock);
   // This will cause -measureWithSizeRange: to actually compute the size instead of returning the previously cached size
   _flags.isMeasured = NO;
 }

AsyncDisplayKit/Private/ASDisplayNode+UIViewBridge.mm

@@ -335,9 +335,9 @@ if (shouldApply) { _layer.layerProperty = (layerValueExpr); } else { _pendingVie
 {
   _bridge_prologue_write;
   _setToLayer(opaque, newOpaque);
-
+  // NOTE: If we're in the background, then when the pending state
-  // FIXME: Would like to setNeedsDisplay if opaqueness changed, but
+  // is applied to the view on main, we will call `setNeedsDisplay` if
-  // not safe to read old value in background.
+  // the new opaque value doesn't match the one on the layer.
 }
 
 - (BOOL)isUserInteractionEnabled
@@ -539,8 +539,9 @@ if (shouldApply) { _layer.layerProperty = (layerValueExpr); } else { _pendingVie
 {
   _bridge_prologue_write;
   _setToLayer(backgroundColor, newBackgroundColor.CGColor);
-  // FIXME: Would like to setNeedsDisplay if background color changed, but
+  // NOTE: If we're in the background, then when the pending state
-  // not safe to read old color in background.
+  // is applied to the view on main, we will call `setNeedsDisplay` if
+  // the new background color doesn't match the one on the layer.
 }
 
 - (UIColor *)tintColor

AsyncDisplayKit/Private/_ASPendingState.m

@@ -557,6 +557,13 @@ static UIColor *defaultTintColor = nil;
 - (void)applyToLayer:(CALayer *)layer
 {
   ASPendingStateFlags flags = _flags;
+
+  if (flags.needsDisplay
+      || (flags.setOpaque && opaque != layer.opaque)
+      || (flags.setBackgroundColor && !CGColorEqualToColor(backgroundColor, layer.backgroundColor))) {
+    [layer setNeedsDisplay];
+  }
+
   if (flags.setAnchorPoint)
     layer.anchorPoint = anchorPoint;
 
@@ -629,9 +636,6 @@ static UIColor *defaultTintColor = nil;
   if (flags.setEdgeAntialiasingMask)
     layer.edgeAntialiasingMask = edgeAntialiasingMask;
 
-  if (flags.needsDisplay)
-    [layer setNeedsDisplay];
-
   if (flags.needsLayout)
     [layer setNeedsLayout];
 
@@ -658,6 +662,12 @@ static UIColor *defaultTintColor = nil;
   CALayer *layer = view.layer;
 
   ASPendingStateFlags flags = _flags;
+  if (flags.needsDisplay
+      || (flags.setOpaque && opaque != view.opaque)
+      || (flags.setBackgroundColor && !CGColorEqualToColor(backgroundColor, layer.backgroundColor))) {
+    [view setNeedsDisplay];
+  }
+
   if (flags.setAnchorPoint)
     layer.anchorPoint = anchorPoint;
 
@@ -752,9 +762,6 @@ static UIColor *defaultTintColor = nil;
   if (flags.setEdgeAntialiasingMask)
     layer.edgeAntialiasingMask = edgeAntialiasingMask;
 
-  if (flags.needsDisplay)
-    [view setNeedsDisplay];
-
   if (flags.needsLayout)
     [view setNeedsLayout];
 

examples/BackgroundPropertySetting/BackgroundPropertySetting.xcodeproj/project.pbxproj

@@ -11,6 +11,8 @@
 		CCD3736F1C751C8A00AB7199 /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = CCD3736E1C751C8A00AB7199 /* ViewController.swift */; };
 		CCD373741C751C8A00AB7199 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = CCD373731C751C8A00AB7199 /* Assets.xcassets */; };
 		CCD373771C751C8A00AB7199 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = CCD373751C751C8A00AB7199 /* LaunchScreen.storyboard */; };
+		CCD3737F1C7520AB00AB7199 /* DemoCellNode.swift in Sources */ = {isa = PBXBuildFile; fileRef = CCD3737E1C7520AB00AB7199 /* DemoCellNode.swift */; };
+		CCD373811C75228900AB7199 /* Utilities.swift in Sources */ = {isa = PBXBuildFile; fileRef = CCD373801C75228900AB7199 /* Utilities.swift */; };
 		FE56E788869496B3522E8AE2 /* Pods.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D966CA4D089E4178A58E447C /* Pods.framework */; };
 /* End PBXBuildFile section */
 
@@ -23,6 +25,8 @@
 		CCD373731C751C8A00AB7199 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		CCD373761C751C8A00AB7199 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		CCD373781C751C8A00AB7199 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		CCD3737E1C7520AB00AB7199 /* DemoCellNode.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DemoCellNode.swift; sourceTree = "<group>"; };
+		CCD373801C75228900AB7199 /* Utilities.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Utilities.swift; sourceTree = "<group>"; };
 		D966CA4D089E4178A58E447C /* Pods.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
 
@@ -78,6 +82,8 @@
 			children = (
 				CCD3736C1C751C8A00AB7199 /* AppDelegate.swift */,
 				CCD3736E1C751C8A00AB7199 /* ViewController.swift */,
+				CCD373801C75228900AB7199 /* Utilities.swift */,
+				CCD3737E1C7520AB00AB7199 /* DemoCellNode.swift */,
 				CCD373731C751C8A00AB7199 /* Assets.xcassets */,
 				CCD373751C751C8A00AB7199 /* LaunchScreen.storyboard */,
 				CCD373781C751C8A00AB7199 /* Info.plist */,
@@ -206,7 +212,9 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				CCD3737F1C7520AB00AB7199 /* DemoCellNode.swift in Sources */,
 				CCD3736F1C751C8A00AB7199 /* ViewController.swift in Sources */,
+				CCD373811C75228900AB7199 /* Utilities.swift in Sources */,
 				CCD3736D1C751C8A00AB7199 /* AppDelegate.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

examples/BackgroundPropertySetting/BackgroundPropertySetting/DemoCellNode.swift

@@ -0,0 +1,87 @@
+//
+//  DemoCellNode.swift
+//  BackgroundPropertySetting
+//
+//  Created by Adlai Holler on 2/17/16.
+//  Copyright © 2016 Adlai Holler. All rights reserved.
+//
+
+import UIKit
+import AsyncDisplayKit
+
+final class DemoCellNode: ASCellNode {
+	let childA = ASDisplayNode()
+	let childB = ASDisplayNode()
+	var state = State.Right
+
+	override init() {
+		super.init()
+		usesImplicitHierarchyManagement = true
+	}
+
+	override func layoutSpecThatFits(constrainedSize: ASSizeRange) -> ASLayoutSpec {
+		let specA = ASRatioLayoutSpec(ratio: 1, child: childA)
+		specA.flexBasis = ASRelativeDimensionMakeWithPoints(1)
+		specA.flexGrow = true
+		let specB = ASRatioLayoutSpec(ratio: 1, child: childB)
+		specB.flexBasis = ASRelativeDimensionMakeWithPoints(1)
+		specB.flexGrow = true
+		let children = state.isReverse ? [ specB, specA ] : [ specA, specB ]
+		let direction: ASStackLayoutDirection = state.isVertical ? .Vertical : .Horizontal
+		return ASStackLayoutSpec(direction: direction,
+			spacing: 20,
+			justifyContent: .SpaceAround,
+			alignItems: .Center,
+			children: children)
+	}
+
+	override func animateLayoutTransition(context: ASContextTransitioning!) {
+		childA.frame = context.initialFrameForNode(childA)
+		childB.frame = context.initialFrameForNode(childB)
+		let tinyDelay = drand48() / 10
+		UIView.animateWithDuration(0.5, delay: tinyDelay, usingSpringWithDamping: 0.9, initialSpringVelocity: 1.5, options: .BeginFromCurrentState, animations: { () -> Void in
+				self.childA.frame = context.finalFrameForNode(self.childA)
+				self.childB.frame = context.finalFrameForNode(self.childB)
+			}, completion: {
+				context.completeTransition($0)
+		})
+	}
+
+	enum State {
+		case Right
+		case Up
+		case Left
+		case Down
+
+		var isVertical: Bool {
+			switch self {
+			case .Up, .Down:
+				return true
+			default:
+				return false
+			}
+		}
+
+		var isReverse: Bool {
+			switch self {
+			case .Left, .Up:
+				return true
+			default:
+				return false
+			}
+		}
+
+		mutating func advance() {
+			switch self {
+			case .Right:
+				self = .Up
+			case .Up:
+				self = .Left
+			case .Left:
+				self = .Down
+			case .Down:
+				self = .Right
+			}
+		}
+	}
+}

examples/BackgroundPropertySetting/BackgroundPropertySetting/Utilities.swift

@@ -0,0 +1,15 @@
+//
+//  Utilities.swift
+//  BackgroundPropertySetting
+//
+//  Created by Adlai Holler on 2/17/16.
+//  Copyright © 2016 Adlai Holler. All rights reserved.
+//
+
+import UIKit
+
+extension UIColor {
+	static func random() -> UIColor {
+		return UIColor(red: CGFloat(drand48()), green: CGFloat(drand48()), blue: CGFloat(drand48()), alpha: 1.0)
+	}
+}

examples/BackgroundPropertySetting/BackgroundPropertySetting/ViewController.swift

@@ -9,56 +9,87 @@
 import UIKit
 import AsyncDisplayKit
 
-final class ViewController: ASViewController, ASTableDelegate, ASTableDataSource {
+final class ViewController: ASViewController, ASCollectionDelegate, ASCollectionDataSource {
+	let itemCount = 1000
 
-	var tableNode: ASTableNode {
+	let itemSize: CGSize
-		return node as! ASTableNode
+	let padding: CGFloat
+	var collectionNode: ASCollectionNode {
+		return node as! ASCollectionNode
 	}
 
 	init() {
-		super.init(node: ASTableNode(style: .Plain))
+		let layout = UICollectionViewFlowLayout()
-		navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Update", style: .Plain, target: self, action: "didTapUpdateButton")
+		(padding, itemSize) = ViewController.computeLayoutSizesForMainScreen()
-		tableNode.delegate = self
+		layout.minimumInteritemSpacing = padding
-		tableNode.dataSource = self
+		layout.minimumLineSpacing = padding
-		title = "Background Node Updating Demo"
+		super.init(node: ASCollectionNode(collectionViewLayout: layout))
+		navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Color", style: .Plain, target: self, action: "didTapColorsButton")
+		navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Layout", style: .Plain, target: self, action: "didTapLayoutButton")
+		collectionNode.delegate = self
+		collectionNode.dataSource = self
+		title = "Background Updating"
 	}
 
 	required init?(coder aDecoder: NSCoder) {
 	    fatalError("init(coder:) has not been implemented")
 	}
-	let rowCount = 20
 
-	func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+	// MARK: ASCollectionDataSource
-		return rowCount
+
+	func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
+		return itemCount
 	}
 
-	func tableView(tableView: ASTableView, nodeBlockForRowAtIndexPath indexPath: NSIndexPath) -> ASCellNodeBlock {
+	func collectionView(collectionView: ASCollectionView, nodeBlockForItemAtIndexPath indexPath: NSIndexPath) -> ASCellNodeBlock {
 		return {
-			let node = ASCellNode()
+			let node = DemoCellNode()
-			node.backgroundColor = getRandomColor()
+			node.backgroundColor = UIColor.random()
+			node.childA.backgroundColor = UIColor.random()
+			node.childB.backgroundColor = UIColor.random()
 			return node
 		}
 	}
 
-	@objc private func didTapUpdateButton() {
+	func collectionView(collectionView: ASCollectionView, constrainedSizeForNodeAtIndexPath indexPath: NSIndexPath) -> ASSizeRange {
-		let currentlyVisibleNodes = tableNode.view.visibleNodes()
+		return ASSizeRangeMake(itemSize, itemSize)
+	}
+
+	// MARK: Action Handling
+
+	@objc private func didTapColorsButton() {
+		let currentlyVisibleNodes = collectionNode.view.visibleNodes()
 		let queue = dispatch_get_global_queue(QOS_CLASS_DEFAULT, 0)
 		dispatch_async(queue) {
-			for case let node as ASCellNode in currentlyVisibleNodes {
+			for case let node as DemoCellNode in currentlyVisibleNodes {
-				node.backgroundColor = getRandomColor()
+				node.backgroundColor = UIColor.random()
 			}
 		}
 	}
+
+	@objc private func didTapLayoutButton() {
+		let currentlyVisibleNodes = collectionNode.view.visibleNodes()
+		let queue = dispatch_get_global_queue(QOS_CLASS_DEFAULT, 0)
+		dispatch_async(queue) {
+			for case let node as DemoCellNode in currentlyVisibleNodes {
+				node.state.advance()
+				node.setNeedsLayout()
+			}
+		}
+	}
+
+	// MARK: Static
+
+	static func computeLayoutSizesForMainScreen() -> (padding: CGFloat, itemSize: CGSize) {
+		let numberOfColumns = 4
+		let screen = UIScreen.mainScreen()
+		let scale = screen.scale
+		let screenWidth = Int(screen.bounds.width * screen.scale)
+		let itemWidthPx = (screenWidth - (numberOfColumns - 1)) / numberOfColumns
+		let leftover = screenWidth - itemWidthPx * numberOfColumns
+		let paddingPx = leftover / (numberOfColumns - 1)
+		let itemDimension = CGFloat(itemWidthPx) / scale
+		let padding = CGFloat(paddingPx) / scale
+		return (padding: padding, itemSize: CGSize(width: itemDimension, height: itemDimension))
+	}
 }
-
-func getRandomColor() -> UIColor{
-
-	let randomRed:CGFloat = CGFloat(drand48())
-
-	let randomGreen:CGFloat = CGFloat(drand48())
-
-	let randomBlue:CGFloat = CGFloat(drand48())
-
-	return UIColor(red: randomRed, green: randomGreen, blue: randomBlue, alpha: 1.0)
-
-}