Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/InstantPageUI/Sources/InstantPageTileNode.swift

@@ -0,0 +1,47 @@
+import Foundation
+import UIKit
+import AsyncDisplayKit
+
+private final class InstantPageTileNodeParameters: NSObject {
+    let tile: InstantPageTile
+    let backgroundColor: UIColor
+    
+    init(tile: InstantPageTile, backgroundColor: UIColor) {
+        self.tile = tile
+        self.backgroundColor = backgroundColor
+        
+        super.init()
+    }
+}
+
+public final class InstantPageTileNode: ASDisplayNode {
+    private let tile: InstantPageTile
+    
+    public init(tile: InstantPageTile, backgroundColor: UIColor) {
+        self.tile = tile
+        
+        super.init()
+        
+        self.isLayerBacked = true
+        self.isOpaque = false
+        self.backgroundColor = backgroundColor
+    }
+    
+    public override func drawParameters(forAsyncLayer layer: _ASDisplayLayer) -> NSObjectProtocol? {
+        return InstantPageTileNodeParameters(tile: self.tile, backgroundColor: self.backgroundColor ?? UIColor.white)
+    }
+    
+    @objc override public class func draw(_ bounds: CGRect, withParameters parameters: Any?, isCancelled: () -> Bool, isRasterizing: Bool) {
+        let context = UIGraphicsGetCurrentContext()!
+        
+        if let parameters = parameters as? InstantPageTileNodeParameters {
+            if !isRasterizing {
+                context.setBlendMode(.copy)
+                context.setFillColor(parameters.backgroundColor.cgColor)
+                context.fill(bounds)
+            }
+            
+            parameters.tile.draw(context: context)
+        }
+    }
+}