Extract out TouchTransparentStackView

Mastodon/Scene/MediaPreview/MediaPreviewViewController.swift

@@ -26,22 +26,6 @@ final class MediaPreviewViewController: UIViewController, NeedsDependency {
     let pagingViewController = MediaPreviewPagingViewController()
 
     let topToolbar: UIStackView = {
-        class TouchTransparentStackView: UIStackView {
-            // allow button hit boxes to grow outside of this view’s bounds
-            override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
-                subviews.contains { $0.point(inside: $0.convert(point, from: self), with: event) }
-            }
-
-            // allow taps on blank areas to pass through
-            override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
-                let view = super.hitTest(point, with: event)
-                if view == self {
-                    return nil
-                }
-                return view
-            }
-        }
-
         let stackView = TouchTransparentStackView()
         stackView.axis = .horizontal
         stackView.distribution = .equalSpacing

MastodonSDK/Sources/MastodonUI/View/Container/TouchTransparentStackView.swift

@@ -0,0 +1,26 @@
+//
+//  TouchTransparentStackView.swift
+//  
+//
+//  Created by Jed Fox on 2022-12-21.
+//
+
+import UIKit
+
+/// A subclass of `UIStackView` that allows touches that aren’t captured by any
+/// of its subviews to pass through to views beneath this view in the Z-order.
+public class TouchTransparentStackView: UIStackView {
+    // allow subview hit boxes to grow outside of this view’s bounds
+    public override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
+        subviews.contains { $0.point(inside: $0.convert(point, from: self), with: event) }
+    }
+    
+    // allow taps on blank areas to pass through
+    public override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
+        let view = super.hitTest(point, with: event)
+        if view == self {
+            return nil
+        }
+        return view
+    }
+}