feat(audio-feedback): Add sound feedback when starting and stopping "…

…tab stops" test (#1851)

Similar to that implemented for event recording, this commit adds an audio
cue when the tab stops test is toggled and "provide feedback with sound"
is enabled.

This commit does duplicate a small quantity of code, but this is not
unprecedented for the project.

Addresses #1833.

src/AccessibilityInsights.SharedUx/Controls/TestTabs/TabStopControl.xaml.cs

@@ -5,6 +5,7 @@
 using AccessibilityInsights.SharedUx.Highlighting;
 using AccessibilityInsights.SharedUx.Settings;
 using AccessibilityInsights.SharedUx.Telemetry;
+using AccessibilityInsights.SharedUx.Utilities;
 using AccessibilityInsights.SharedUx.ViewModels;
 using Axe.Windows.Actions;
 using Axe.Windows.Actions.Contexts;
@@ -19,7 +20,10 @@
 using System;
 using System.Diagnostics;
 using System.Globalization;
+using System.IO;
 using System.Linq;
+using System.Media;
+using System.Reflection;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows;
@@ -146,12 +150,21 @@ private bool IsRecordingActive
             }
         }
 
+        private readonly Stream startRecordingSoundStream;
+        private readonly Stream stopRecordingSoundStream;
+        private readonly SoundPlayer player;
+
         /// <summary>
         /// Constructor
         /// </summary>
         public TabStopControl()
         {
             InitializeComponent();
+
+            player = new SoundPlayer();
+            Assembly assembly = Assembly.GetExecutingAssembly();
+            startRecordingSoundStream = assembly.GetManifestResourceStream(assembly.GetName().Name + ".Resources.Sound.start_event_recording.wav");
+            stopRecordingSoundStream = assembly.GetManifestResourceStream(assembly.GetName().Name + ".Resources.Sound.stop_event_recording.wav");
         }
 
         /// <summary>
@@ -282,6 +295,18 @@ private void TurnOffHighlighter()
             this.HighlightVisibility = false;
         }
 
+        /// <summary>If sounds are enabled, play the passed-in stream. Used to enable sound feedback when toggling recording.</summary>
+        private void PlaySoundIfNeeded(Stream stream)
+        {
+            if (HelperMethods.ShouldPlaySound)
+            {
+                player.Stop();
+                player.Stream = stream;
+                player.Stream.Position = 0;
+                player.Play();
+            }
+        }
+
         /// <summary>
         /// Toggle event recording
         /// </summary>
@@ -354,6 +379,7 @@ private void StartRecordingEvent()
                 EventHandler?.RegisterAutomationEventListener(EventType.UIA_AutomationFocusChangedEventId, this.EventMessageReceived);
                 lvElements.Items.Clear();
                 IsRecordingActive = true;
+                PlaySoundIfNeeded(startRecordingSoundStream);
                 Logger.PublishTelemetryEvent(TelemetryAction.TabStop_Record_On,
                     TelemetryProperty.Scope, SelectAction.GetDefaultInstance().Scope.ToString());
             }
@@ -473,6 +499,7 @@ internal void StopRecordEvents()
             {
                 this.EventHandler.UnregisterAutomationEventListener(EventType.UIA_AutomationFocusChangedEventId);
                 IsRecordingActive = false;
+                PlaySoundIfNeeded(stopRecordingSoundStream);
                 this.Toast.Visibility = Visibility.Collapsed;
             }
         }