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Display/PeekControllerMenuItemNode.swift

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+import Foundation
+import AsyncDisplayKit
+
+public enum PeekControllerMenuItemColor {
+    case accent
+    case destructive
+}
+
+public struct PeekControllerMenuItem {
+    public let title: String
+    public let color: PeekControllerMenuItemColor
+    public let action: () -> Void
+    
+    public init(title: String, color: PeekControllerMenuItemColor, action: @escaping () -> Void) {
+        self.title = title
+        self.color = color
+        self.action = action
+    }
+}
+
+final class PeekControllerMenuItemNode: HighlightTrackingButtonNode {
+    private let item: PeekControllerMenuItem
+    private let activatedAction: () -> Void
+    
+    private let separatorNode: ASDisplayNode
+    private let highlightedBackgroundNode: ASDisplayNode
+    private let textNode: ASTextNode
+    
+    init(theme: PeekControllerTheme, item: PeekControllerMenuItem, activatedAction: @escaping () -> Void) {
+        self.item = item
+        self.activatedAction = activatedAction
+        
+        self.separatorNode = ASDisplayNode()
+        self.separatorNode.isLayerBacked = true
+        self.separatorNode.backgroundColor = theme.menuItemSeparatorColor
+        
+        self.highlightedBackgroundNode = ASDisplayNode()
+        self.highlightedBackgroundNode.isLayerBacked = true
+        self.highlightedBackgroundNode.backgroundColor = theme.menuItemHighligtedColor
+        self.highlightedBackgroundNode.alpha = 0.0
+        
+        self.textNode = ASTextNode()
+        self.textNode.isLayerBacked = true
+        self.textNode.displaysAsynchronously = false
+        
+        let textColor: UIColor
+        switch item.color {
+            case .accent:
+                textColor = theme.accentColor
+            case .destructive:
+                textColor = theme.destructiveColor
+        }
+        self.textNode.attributedText = NSAttributedString(string: item.title, font: Font.regular(20.0), textColor: textColor)
+        
+        super.init()
+        
+        self.addSubnode(self.separatorNode)
+        self.addSubnode(self.highlightedBackgroundNode)
+        self.addSubnode(self.textNode)
+        
+        self.highligthedChanged = { [weak self] highlighted in
+            if let strongSelf = self {
+                if highlighted {
+                    strongSelf.view.superview?.bringSubview(toFront: strongSelf.view)
+                    strongSelf.highlightedBackgroundNode.alpha = 1.0
+                } else {
+                    strongSelf.highlightedBackgroundNode.alpha = 0.0
+                    strongSelf.highlightedBackgroundNode.layer.animateAlpha(from: 1.0, to: 0.0, duration: 0.3)
+                }
+            }
+        }
+        
+        self.addTarget(self, action: #selector(self.buttonPressed), forControlEvents: .touchUpInside)
+    }
+    
+    func updateLayout(width: CGFloat, transition: ContainedViewLayoutTransition) -> CGFloat {
+        let height: CGFloat = 57.0
+        transition.updateFrame(node: self.highlightedBackgroundNode, frame: CGRect(origin: CGPoint(), size: CGSize(width: width, height: height)))
+        transition.updateFrame(node: self.separatorNode, frame: CGRect(origin: CGPoint(x: 0.0, y: height), size: CGSize(width: width, height: UIScreenPixel)))
+        
+        let textSize = self.textNode.measure(CGSize(width: width - 10.0, height: height))
+        transition.updateFrame(node: self.textNode, frame: CGRect(origin: CGPoint(x: floor((width - textSize.width) / 2.0), y: floor((height - textSize.height) / 2.0)), size: textSize))
+        
+        return height
+    }
+    
+    @objc func buttonPressed() {
+        self.activatedAction()
+        self.item.action()
+    }
+}