More context menus

Reader/Screens/Home/HomeViewController.swift

@@ -210,4 +210,23 @@ extension HomeViewController: UICollectionViewDelegate {
         vc.title = item.title
         show(vc, sender: nil)
     }
+    
+    func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
+        guard let item = dataSource.itemIdentifier(for: indexPath) else {
+            return nil
+        }
+        return UIContextMenuConfiguration(identifier: nil, previewProvider: {
+            return ItemsViewController(fetchRequest: item.fetchRequest, fervorController: self.fervorController)
+        }, actionProvider: nil)
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
+        guard let vc = animator.previewViewController else {
+            return
+        }
+        animator.preferredCommitStyle = .pop
+        animator.addCompletion {
+            self.show(vc, sender: nil)
+        }
+    }
 }

Reader/Screens/Items/ItemsViewController.swift

@@ -35,6 +35,7 @@ class ItemsViewController: UIViewController {
         configuration.backgroundColor = .appBackground
         let layout = UICollectionViewCompositionalLayout.list(using: configuration)
         collectionView = UICollectionView(frame: view.bounds, collectionViewLayout: layout)
+        collectionView.delegate = self
         collectionView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
         collectionView.register(ItemCollectionViewCell.self, forCellWithReuseIdentifier: "itemCell")
         view.addSubview(collectionView)
@@ -80,6 +81,27 @@ extension ItemsViewController: NSFetchedResultsControllerDelegate {
     }
 }
 
+extension ItemsViewController: UICollectionViewDelegate {
+    func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
+        guard let item = dataSource.itemIdentifier(for: indexPath) else {
+            return nil
+        }
+        return UIContextMenuConfiguration(identifier: nil, previewProvider: {
+            ReadViewController(item: item, fervorController: self.fervorController)
+        }, actionProvider: nil)
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
+        guard let vc = animator.previewViewController else {
+            return
+        }
+        animator.preferredCommitStyle = .pop
+        animator.addCompletion {
+            self.show(vc, sender: nil)
+        }
+    }
+}
+
 extension ItemsViewController: ItemCollectionViewCellDelegate {
     func itemCellSelected(item: Item) {
         show(ReadViewController(item: item, fervorController: fervorController), sender: nil)