Make table and collection view focusable

Tusker.xcodeproj/xcshareddata/xcschemes/Tusker.xcscheme

@@ -88,6 +88,10 @@
             argument = "-com.apple.CoreData.ConcurrencyDebug 1"
             isEnabled = "YES">
          </CommandLineArgument>
+         <CommandLineArgument
+            argument = "-UIFocusLoggingEnabled YES"
+            isEnabled = "NO">
+         </CommandLineArgument>
          <CommandLineArgument
             argument = "-UIFocusLoopDebuggerEnabled YES"
             isEnabled = "YES">

Tusker/Screens/Account List/AccountListViewController.swift

@@ -36,6 +36,7 @@ class AccountListViewController: UIViewController, CollectionViewController {
         view = UICollectionView(frame: .zero, collectionViewLayout: layout)
         collectionView.delegate = self
         collectionView.dragDelegate = self
+        collectionView.allowsFocus = true
         dataSource = createDataSource()
     }
     

Tusker/Screens/Asset Picker/AssetCollectionViewController.swift

@@ -79,6 +79,7 @@ class AssetCollectionViewController: UIViewController, UICollectionViewDelegate
         collectionView.alwaysBounceVertical = true
         collectionView.allowsMultipleSelection = true
         collectionView.allowsSelection = true
+        collectionView.allowsFocus = true
         
         collectionView.register(UINib(nibName: "AssetCollectionViewCell", bundle: .main), forCellWithReuseIdentifier: reuseIdentifier)
         

Tusker/Screens/Asset Picker/AssetCollectionsListViewController.swift

@@ -33,6 +33,8 @@ class AssetCollectionsListViewController: UITableViewController {
         tableView.register(UINib(nibName: "AllPhotosTableViewCell", bundle: .main), forCellReuseIdentifier: "allPhotosCell")
         tableView.register(UINib(nibName: "AlbumTableViewCell", bundle: .main), forCellReuseIdentifier: "albumCell")
         
+        tableView.allowsFocus = true
+        
         dataSource = DataSource(tableView: tableView, cellProvider: { (tableView, indexPath, item) -> UITableViewCell? in
             switch item {
             case .cameraRoll:

Tusker/Screens/Bookmarks/BookmarksTableViewController.swift

@@ -41,7 +41,8 @@ class BookmarksTableViewController: EnhancedTableViewController {
 
         tableView.rowHeight = UITableView.automaticDimension
         tableView.estimatedRowHeight = 140
-       
+        tableView.allowsFocus = true
+        
         tableView.register(UINib(nibName: "TimelineStatusTableViewCell", bundle: .main), forCellReuseIdentifier: statusCell)
         
         tableView.prefetchDataSource = self

Tusker/Screens/Conversation/ConversationTableViewController.swift

@@ -61,13 +61,13 @@ class ConversationTableViewController: EnhancedTableViewController {
 
         tableView.delegate = self
         tableView.dataSource = self
+        tableView.prefetchDataSource = self
         
         tableView.register(UINib(nibName: "TimelineStatusTableViewCell", bundle: nil), forCellReuseIdentifier: "statusCell")
         tableView.register(UINib(nibName: "ConversationMainStatusTableViewCell", bundle: nil), forCellReuseIdentifier: "mainStatusCell")
         tableView.register(UINib(nibName: "ExpandThreadTableViewCell", bundle: .main), forCellReuseIdentifier: "expandThreadCell")
         
-        tableView.prefetchDataSource = self
+        tableView.allowsFocus = true
-        
         tableView.backgroundColor = .secondarySystemBackground
         // separators are disabled on the table view so we can re-add them ourselves
         // so they're not inserted in between statuses in the ame sub-thread

Tusker/Screens/Explore/AddSavedHashtagViewController.swift

@@ -42,6 +42,7 @@ class AddSavedHashtagViewController: UIViewController {
         collectionView = UICollectionView(frame: view.bounds, collectionViewLayout: layout)
         collectionView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
         collectionView.delegate = self
+        collectionView.allowsFocus = true
         view.addSubview(collectionView)
         
         let sectionHeaderCell = UICollectionView.SupplementaryRegistration<UICollectionViewListCell>(elementKind: UICollectionView.elementKindSectionHeader) { (headerView, collectionView, indexPath) in

Tusker/Screens/Explore/ExploreViewController.swift

@@ -50,6 +50,7 @@ class ExploreViewController: UIViewController, UICollectionViewDelegate, Collect
         collectionView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
         collectionView.delegate = self
         collectionView.dragDelegate = self
+        collectionView.allowsFocus = true
         view.addSubview(collectionView)
         
         dataSource = createDataSource()

Tusker/Screens/Explore/ProfileDirectoryViewController.swift

@@ -68,6 +68,7 @@ class ProfileDirectoryViewController: UIViewController {
         collectionView.register(UINib(nibName: "FeaturedProfileCollectionViewCell", bundle: .main), forCellWithReuseIdentifier: "featuredProfileCell")
         collectionView.delegate = self
         collectionView.dragDelegate = self
+        collectionView.allowsFocus = true
         view.addSubview(collectionView)
         
         dataSource = createDataSource()

Tusker/Screens/Explore/TrendingHashtagsViewController.swift

@@ -40,6 +40,7 @@ class TrendingHashtagsViewController: UIViewController {
         collectionView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
         collectionView.delegate = self
         collectionView.dragDelegate = self
+        collectionView.allowsFocus = true
         view.addSubview(collectionView)
         
         let registration = UICollectionView.CellRegistration<TrendingHashtagCollectionViewCell, Hashtag> { cell, indexPath, hashtag in

Tusker/Screens/Explore/TrendingLinksViewController.swift

@@ -36,6 +36,7 @@ class TrendingLinksViewController: EnhancedTableViewController {
         
         tableView.register(TrendingLinkTableViewCell.self, forCellReuseIdentifier: "trendingLinkCell")
         tableView.estimatedRowHeight = 100
+        tableView.allowsFocus = true
         
         dataSource = UITableViewDiffableDataSource(tableView: tableView, cellProvider: { tableView, indexPath, item in
             let cell = tableView.dequeueReusableCell(withIdentifier: "trendingLinkCell", for: indexPath) as! TrendingLinkTableViewCell

Tusker/Screens/Explore/TrendingStatusesViewController.swift

@@ -70,6 +70,7 @@ class TrendingStatusesViewController: UIViewController {
         view = UICollectionView(frame: .zero, collectionViewLayout: layout)
         collectionView.delegate = self
         collectionView.dragDelegate = self
+        collectionView.allowsFocus = true
         
         dataSource = createDataSource()
     }

Tusker/Screens/Lists/EditListAccountsViewController.swift

@@ -53,6 +53,7 @@ class EditListAccountsViewController: EnhancedTableViewController {
         
         tableView.rowHeight = UITableView.automaticDimension
         tableView.estimatedRowHeight = 66
+        tableView.allowsSelection = false
         
         dataSource = DataSource(tableView: tableView, cellProvider: { (tableView, indexPath, item) -> UITableViewCell? in
             guard case let .account(id) = item else { fatalError() }

Tusker/Screens/Notifications/NotificationsTableViewController.swift

@@ -55,7 +55,9 @@ class NotificationsTableViewController: DiffableTimelineLikeTableViewController<
         tableView.register(UINib(nibName: "PollFinishedTableViewCell", bundle: .main), forCellReuseIdentifier: pollCell)
         tableView.register(UINib(nibName: "StatusUpdatedNotificationTableViewCell", bundle: .main), forCellReuseIdentifier: updatedCell)
         tableView.register(UINib(nibName: "BasicTableViewCell", bundle: .main), forCellReuseIdentifier: unknownCell)
+        
         tableView.cellLayoutMarginsFollowReadableWidth = true
+        tableView.allowsFocus = true
     }
     
     private func request(range: RequestRange) -> Request<[Pachyderm.Notification]> {

Tusker/Screens/Profile/ProfileStatusesViewController.swift

@@ -94,6 +94,7 @@ class ProfileStatusesViewController: UIViewController, TimelineLikeCollectionVie
         view = UICollectionView(frame: .zero, collectionViewLayout: layout)
         collectionView.delegate = self
         collectionView.dragDelegate = self
+        collectionView.allowsFocus = true
         
         registerTimelineLikeCells()
         dataSource = createDataSource()
@@ -555,6 +556,15 @@ extension ProfileStatusesViewController: UICollectionViewDelegate {
     func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
         MenuPreviewHelper.willPerformPreviewAction(animator: animator, presenter: self)
     }
+    
+    func collectionView(_ collectionView: UICollectionView, canFocusItemAt indexPath: IndexPath) -> Bool {
+        switch dataSource.itemIdentifier(for: indexPath) {
+        case .header(_), .loadingIndicator:
+            return false
+        default:
+            return true
+        }
+    }
 }
 
 extension ProfileStatusesViewController: UICollectionViewDragDelegate {

Tusker/Screens/Search/SearchResultsViewController.swift

@@ -83,6 +83,8 @@ class SearchResultsViewController: EnhancedTableViewController {
         tableView.register(UINib(nibName: "TimelineStatusTableViewCell", bundle: .main), forCellReuseIdentifier: statusCell)
         tableView.register(UINib(nibName: "HashtagTableViewCell", bundle: .main), forCellReuseIdentifier: hashtagCell)
         
+        tableView.allowsFocus = true
+        
         dataSource = DataSource(tableView: tableView, cellProvider: { (tableView, indexPath, item) -> UITableViewCell? in
             switch item {
             case let .account(id):

Tusker/Screens/Search/SearchViewController.swift

@@ -70,6 +70,7 @@ class SearchViewController: UIViewController {
         collectionView.delegate = self
         collectionView.dragDelegate = self
         collectionView.backgroundColor = .secondarySystemBackground
+        collectionView.allowsFocus = true
         view.addSubview(collectionView)
         
         dataSource = createDataSource()

Tusker/Screens/Status Action Account List/StatusActionAccountListViewController.swift

@@ -74,6 +74,7 @@ class StatusActionAccountListViewController: UIViewController, CollectionViewCon
         view = UICollectionView(frame: .zero, collectionViewLayout: layout)
         collectionView.delegate = self
         collectionView.dragDelegate = self
+        collectionView.allowsFocus = true
         dataSource = createDataSource()
     }
     

Tusker/Screens/Timeline/TimelineViewController.swift

@@ -98,6 +98,7 @@ class TimelineViewController: UIViewController, TimelineLikeCollectionViewContro
         collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)
         collectionView.delegate = self
         collectionView.dragDelegate = self
+        collectionView.allowsFocus = true
         collectionView.translatesAutoresizingMaskIntoConstraints = false
         view.addSubview(collectionView)
         NSLayoutConstraint.activate([