VoiceOver: Fix not being able to select account from conversation main status cell

Closes #285

Tusker/Views/Profile Header/ProfileHeaderView.swift

@@ -150,6 +150,7 @@ class ProfileHeaderView: UIView {
         accessibilityElements = [
             displayNameLabel!,
             usernameLabel!,
+            relationshipLabel!,
             noteTextView!,
             fieldsView!,
             moreButton!,

Tusker/Views/Status/ConversationMainStatusTableViewCell.swift

@@ -26,12 +26,12 @@ class ConversationMainStatusTableViewCell: BaseStatusTableViewCell {
     @IBOutlet weak var totalReblogsButton: UIButton!
     @IBOutlet weak var timestampAndClientLabel: UILabel!
 
-    var profileAccessibilityElement: UIAccessibilityElement!
+    private var profileAccessibilityElement: ConversationMainStatusProfileAccessibilityElement!
     
     override func awakeFromNib() {
         super.awakeFromNib()
 
-        profileAccessibilityElement = UIAccessibilityElement(accessibilityContainer: self)
+        profileAccessibilityElement = ConversationMainStatusProfileAccessibilityElement(accessibilityContainer: self)
         profileAccessibilityElement.accessibilityFrameInContainerSpace = profileDetailContainerView.convert(profileDetailContainerView.frame, to: self)
         accessibilityElements = [
             profileAccessibilityElement!,
@@ -101,8 +101,8 @@ class ConversationMainStatusTableViewCell: BaseStatusTableViewCell {
     
     override func updateUI(account: AccountMO) {
         super.updateUI(account: account)
-
-        profileAccessibilityElement.accessibilityLabel = account.displayNameWithoutCustomEmoji
+        profileAccessibilityElement.navigationDelegate = delegate
+        profileAccessibilityElement.accountID = account.id
     }
     
     override func updateUIForPreferences(account: AccountMO, status: StatusMO) {
@@ -130,6 +130,27 @@ class ConversationMainStatusTableViewCell: BaseStatusTableViewCell {
     }
 }
 
+private class ConversationMainStatusProfileAccessibilityElement: UIAccessibilityElement {
+    var navigationDelegate: TuskerNavigationDelegate!
+    var mastodonController: MastodonController { navigationDelegate.apiController }
+    var accountID: String!
+    
+    override var accessibilityLabel: String? {
+        get { mastodonController.persistentContainer.account(for: accountID)?.displayNameWithoutCustomEmoji }
+        set {}
+    }
+    
+    override var accessibilityHint: String? {
+        get { "Double tap to show profile." }
+        set {}
+    }
+    
+    override func accessibilityActivate() -> Bool {
+        navigationDelegate.selected(account: accountID)
+        return true
+    }
+}
+
 extension ConversationMainStatusTableViewCell: UIContextMenuInteractionDelegate {
     func contextMenuInteraction(_ interaction: UIContextMenuInteraction, configurationForMenuAtLocation location: CGPoint) -> UIContextMenuConfiguration? {
         return UIContextMenuConfiguration(identifier: nil) {

Tusker/Views/Status/TimelineStatusCollectionViewCell.swift

@@ -429,10 +429,16 @@ class TimelineStatusCollectionViewCell: UICollectionViewListCell, StatusCollecti
     
     override var accessibilityCustomActions: [UIAccessibilityCustomAction]? {
         get {
-            guard let text = contentTextView.attributedText else {
+            guard let text = contentTextView.attributedText,
+                  let status = mastodonController.persistentContainer.status(for: statusID) else {
                 return nil
             }
-            var actions: [UIAccessibilityCustomAction] = []
+            var actions = [
+                UIAccessibilityCustomAction(name: "Show \(status.account.displayNameWithoutCustomEmoji)", actionHandler: { [unowned self] _ in
+                    self.delegate?.selected(account: status.account.id)
+                    return true
+                })
+            ]
             text.enumerateAttribute(.link, in: NSRange(location: 0, length: text.length)) { value, range, stop in
                 guard let value = value as? URL else {
                     return

Tusker/Views/Status/TimelineStatusTableViewCell.swift

@@ -310,10 +310,16 @@ class TimelineStatusTableViewCell: BaseStatusTableViewCell {
     
     override var accessibilityCustomActions: [UIAccessibilityCustomAction]? {
         get {
-            guard let text = contentTextView.attributedText else {
+            guard let text = contentTextView.attributedText,
+                  let status = mastodonController.persistentContainer.status(for: statusID) else {
                 return nil
             }
-            var actions: [UIAccessibilityCustomAction] = []
+            var actions = [
+                UIAccessibilityCustomAction(name: "Show \(status.account.displayNameWithoutCustomEmoji)", actionHandler: { [unowned self] _ in
+                    self.delegate?.selected(account: status.account.id)
+                    return true
+                })
+            ]
             text.enumerateAttribute(.link, in: NSRange(location: 0, length: text.length)) { value, range, stop in
                 guard let value = value as? URL else {
                     return