[Settings] Announces open/close navigation pane (#12648)

* [Settings] Announces open/close navigation pane

* Add localization support

src/settings-ui/Microsoft.PowerToys.Settings.UI/Strings/en-us/Resources.resw

@@ -249,6 +249,14 @@ Disabling this module or closing PowerToys will unmute the microphone and camera
     <value>Keyboard Manager</value>
     <comment>Product name: Navigation view item name for Keyboard Manager</comment>
   </data>
+  <data name="Shell_NavigationMenu_Announce_Collapse" xml:space="preserve">
+    <value>Navigation closed</value>
+    <comment>Accessibility announcement when the navigation pane collapses</comment>
+  </data>
+  <data name="Shell_NavigationMenu_Announce_Open" xml:space="preserve">
+    <value>Navigation opened</value>
+    <comment>Accessibility announcement when the navigation pane opens</comment>
+  </data>
   <data name="KeyboardManager_ConfigHeader.Text" xml:space="preserve">
     <value>Current configuration</value>
     <comment>Keyboard Manager current configuration header</comment>
@@ -1376,14 +1384,14 @@ From there, simply click on a Markdown file or SVG icon in the File Explorer and
   <data name="Delete_Dialog_Description" xml:space="preserve">
     <value>Are you sure you want to delete this item?</value>
   </data>
-	<data name="Yes" xml:space="preserve">
+  <data name="Yes" xml:space="preserve">
     <value>Yes</value>
     <comment>Label of a confirmation button</comment>
-	  </data>
+  </data>
   <data name="Learn_More_Description.AutomationProperties.Name" xml:space="preserve">
     <value>Learn more</value>
   </data>
-    <data name="ColorPicker_ColorFormat_ToggleSwitch.AutomationProperties.Name" xml:space="preserve">
+  <data name="ColorPicker_ColorFormat_ToggleSwitch.AutomationProperties.Name" xml:space="preserve">
     <value>Show format in editor</value>
   </data>
 </root>

src/settings-ui/Microsoft.PowerToys.Settings.UI/Views/ShellPage.xaml

@@ -28,6 +28,8 @@
         OpenPaneLength="296"
         CompactModeThresholdWidth="0"
         Background="{ThemeResource SystemControlBackgroundAltHighBrush}"
+        PaneOpened="NavigationView_PaneOpened"
+        PaneClosed="NavigationView_PaneClosed"
         SelectionChanged="NavigationView_SelectionChanged">
             <winui:NavigationView.MenuItems>
                 <winui:NavigationViewItem x:Uid="Shell_General" helpers:NavHelper.NavigateTo="views:GeneralPage">

src/settings-ui/Microsoft.PowerToys.Settings.UI/Views/ShellPage.xaml.cs

@@ -7,7 +7,9 @@ using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using Microsoft.PowerToys.Settings.UI.Services;
 using Microsoft.PowerToys.Settings.UI.ViewModels;
+using Windows.ApplicationModel.Resources;
 using Windows.Data.Json;
+using Windows.UI.Xaml.Automation.Peers;
 using Windows.UI.Xaml.Controls;
 
 namespace Microsoft.PowerToys.Settings.UI.Views
@@ -161,5 +163,61 @@ namespace Microsoft.PowerToys.Settings.UI.Views
         {
             scrollViewer.ChangeView(null, 0, null, true);
         }
+
+        private bool navigationViewInitialStateProcessed; // avoid announcing initial state of the navigation pane.
+
+        [SuppressMessage("Usage", "CA1801:Review unused parameters", Justification = "Params are required for event handler signature requirements.")]
+#pragma warning disable CA1822 // Mark members as static
+        private void NavigationView_PaneOpened(Microsoft.UI.Xaml.Controls.NavigationView sender, object args)
+        {
+            if (!navigationViewInitialStateProcessed)
+            {
+                navigationViewInitialStateProcessed = true;
+                return;
+            }
+
+            var peer = FrameworkElementAutomationPeer.FromElement(sender);
+            if (peer == null)
+            {
+                peer = FrameworkElementAutomationPeer.CreatePeerForElement(sender);
+            }
+
+            if (AutomationPeer.ListenerExists(AutomationEvents.MenuOpened))
+            {
+                var loader = Windows.ApplicationModel.Resources.ResourceLoader.GetForCurrentView();
+                peer.RaiseNotificationEvent(
+                    AutomationNotificationKind.ActionCompleted,
+                    AutomationNotificationProcessing.ImportantMostRecent,
+                    loader.GetString("Shell_NavigationMenu_Announce_Open"),
+                    "navigationMenuPaneOpened");
+            }
+        }
+
+        [SuppressMessage("Usage", "CA1801:Review unused parameters", Justification = "Params are required for event handler signature requirements.")]
+        private void NavigationView_PaneClosed(Microsoft.UI.Xaml.Controls.NavigationView sender, object args)
+        {
+            if (!navigationViewInitialStateProcessed)
+            {
+                navigationViewInitialStateProcessed = true;
+                return;
+            }
+
+            var peer = FrameworkElementAutomationPeer.FromElement(sender);
+            if (peer == null)
+            {
+                peer = FrameworkElementAutomationPeer.CreatePeerForElement(sender);
+            }
+
+            if (AutomationPeer.ListenerExists(AutomationEvents.MenuClosed))
+            {
+                var loader = Windows.ApplicationModel.Resources.ResourceLoader.GetForCurrentView();
+                peer.RaiseNotificationEvent(
+                    AutomationNotificationKind.ActionCompleted,
+                    AutomationNotificationProcessing.ImportantMostRecent,
+                    loader.GetString("Shell_NavigationMenu_Announce_Collapse"),
+                    "navigationMenuPaneClosed");
+            }
+        }
+#pragma warning restore CA1822 // Mark members as static
     }
 }