Fixed several screen reader issues during the gameplay

Author: Bianca Marina Stana

Assets/Scripts/Gameplay/GameViewController.cs

@@ -312,17 +312,18 @@ void MoveCard(bool shouldMoveLeft, int count)
                 AssistiveSupport.activeHierarchy.MoveNode(element.node, element.node.parent,
                     element.transform.GetSiblingIndex());
 
-                // Only refresh the frames for now to leave the announcement request to be handled.
-                StartCoroutine(RefreshNodeFrames());
-
-                AssistiveSupport.notificationDispatcher.SendLayoutChanged(element.node);
+                // After the move, the screen reader will refocus on the other card, but with a little delay. Move the
+                // focus to the selected card, but wait a bit to let the first focus change complete. Otherwise, the
+                // screen reader will focus on the selected card first, then still on the other card, triggering an
+                // infinite swap of the two cards.
+                StartCoroutine(DelaySendLayoutChanged());
                 return;
 
-                IEnumerator RefreshNodeFrames()
+                IEnumerator DelaySendLayoutChanged()
                 {
                     yield return new WaitForEndOfFrame();
 
-                    AssistiveSupport.activeHierarchy?.RefreshNodeFrames();
+                    AssistiveSupport.notificationDispatcher.SendLayoutChanged(element.node);
                 }
             }
         }

Assets/Scripts/UITk/MainView.cs

@@ -734,6 +734,10 @@ void MoveCard(bool shouldMoveLeft, int count = 1)
                 m_LetterCardContainer.selectedCard.MoveLeft(count) :
                 m_LetterCardContainer.selectedCard.MoveRight(count);
 
+            // After the move, the screen reader will refocus on the other card, but with a little delay. Move the focus
+            // to the selected card, but wait a bit to let the first focus change complete. Otherwise, the screen reader
+            // will focus on the selected card first, then still on the other card, triggering an infinite swap of the
+            // two cards.
             m_MainView.schedule.Execute(() =>
                 AssistiveSupport.notificationDispatcher.SendLayoutChanged(node)
                 ).ExecuteLater(50);
@@ -743,7 +747,8 @@ void MoveCard(bool shouldMoveLeft, int count = 1)
                 // TODO: This should be localized.
                 var message = $"Moved {selectedCardText} {(shouldMoveLeft ? "before" : "after")} {otherCardText}";
 
-                // Announce that the card was moved.
+                // Announce that the card was moved. Give a bit of time for the layout change notification to be
+                // processed first so that the announcement is not interrupted by the focus change.
                 m_MainView.schedule.Execute(() =>
                     AssistiveSupport.notificationDispatcher.SendAnnouncement(message)
                 ).ExecuteLater(100);