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Display/ContextMenuController.swift

@@ -0,0 +1,72 @@
+import Foundation
+import AsyncDisplayKit
+
+public final class ContextMenuControllerPresentationArguments {
+    fileprivate let sourceNodeAndRect: () -> (ASDisplayNode, CGRect)?
+    
+    public init(sourceNodeAndRect: @escaping () -> (ASDisplayNode, CGRect)?) {
+        self.sourceNodeAndRect = sourceNodeAndRect
+    }
+}
+
+public final class ContextMenuController: ViewController {
+    private var contextMenuNode: ContextMenuNode {
+        return self.displayNode as! ContextMenuNode
+    }
+    
+    private let actions: [ContextMenuAction]
+    
+    private var layout: ContainerViewLayout?
+    
+    public init(actions: [ContextMenuAction]) {
+        self.actions = actions
+        
+        super.init()
+    }
+    
+    required public init(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    open override func loadDisplayNode() {
+        self.displayNode = ContextMenuNode(actions: self.actions, dismiss: { [weak self] in
+            self?.contextMenuNode.animateOut { [weak self] in
+                self?.presentingViewController?.dismiss(animated: false)
+            }
+        })
+        self.displayNodeDidLoad()
+        self.navigationBar.isHidden = true
+    }
+    
+    override public func viewDidAppear(_ animated: Bool) {
+        super.viewDidAppear(animated)
+        
+        self.contextMenuNode.animateIn()
+    }
+    
+    override open func containerLayoutUpdated(_ layout: ContainerViewLayout, transition: ContainedViewLayoutTransition) {
+        super.containerLayoutUpdated(layout, transition: transition)
+        
+        if self.layout != nil && self.layout! != layout {
+            self.contextMenuNode.animateOut { [weak self] in
+                self?.presentingViewController?.dismiss(animated: false)
+            }
+        } else {
+            self.layout = layout
+            
+            if let presentationArguments = self.presentationArguments as? ContextMenuControllerPresentationArguments, let (sourceNode, sourceRect) = presentationArguments.sourceNodeAndRect() {
+                self.contextMenuNode.sourceRect = sourceNode.view.convert(sourceRect, to: nil)
+            } else {
+                self.contextMenuNode.sourceRect = nil
+            }
+            
+            self.contextMenuNode.containerLayoutUpdated(layout, transition: transition)
+        }
+    }
+    
+    open override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        
+        self.contextMenuNode.animateIn()
+    }
+}