From 4491fa1fdde439e840beb1281b19b521947eb5b4 Mon Sep 17 00:00:00 2001
From: Difegue <sugoi@cock.li>
Date: Tue, 24 Sep 2024 18:16:28 +0200
Subject: [PATCH] Add narration support to NavigationViewItem

---
 .../NavigationView/NavigationViewItem.cs      |  6 ++
 .../NavigationViewItemAutomationPeer.cs       | 72 +++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 src/Wpf.Ui/Controls/NavigationView/NavigationViewItemAutomationPeer.cs

diff --git a/src/Wpf.Ui/Controls/NavigationView/NavigationViewItem.cs b/src/Wpf.Ui/Controls/NavigationView/NavigationViewItem.cs
index e85c80677..3eaa41b40 100644
--- a/src/Wpf.Ui/Controls/NavigationView/NavigationViewItem.cs
+++ b/src/Wpf.Ui/Controls/NavigationView/NavigationViewItem.cs
@@ -8,6 +8,7 @@
 using System.Collections;
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
+using System.Windows.Automation.Peers;
 using System.Windows.Controls;
 using System.Windows.Input;
 
@@ -438,6 +439,11 @@ protected override void OnMouseDown(MouseButtonEventArgs e)
         e.Handled = true;
     }
 
+    protected override AutomationPeer OnCreateAutomationPeer()
+    {
+        return new NavigationViewItemAutomationPeer(this);
+    }
+
     private void OnMenuItems_CollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
     {
         SetValue(HasMenuItemsPropertyKey, MenuItems.Count > 0);
diff --git a/src/Wpf.Ui/Controls/NavigationView/NavigationViewItemAutomationPeer.cs b/src/Wpf.Ui/Controls/NavigationView/NavigationViewItemAutomationPeer.cs
new file mode 100644
index 000000000..7a78729c5
--- /dev/null
+++ b/src/Wpf.Ui/Controls/NavigationView/NavigationViewItemAutomationPeer.cs
@@ -0,0 +1,72 @@
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+// All Rights Reserved.
+
+using System.Windows.Automation;
+using System.Windows.Automation.Peers;
+
+namespace Wpf.Ui.Controls;
+
+internal class NavigationViewItemAutomationPeer : FrameworkElementAutomationPeer
+{
+    private readonly NavigationViewItem _owner;
+
+    public NavigationViewItemAutomationPeer(NavigationViewItem owner)
+        : base(owner)
+    {
+        _owner = owner;
+    }
+
+    protected override string GetClassNameCore()
+    {
+        return "NavigationItem";
+    }
+
+    protected override AutomationControlType GetAutomationControlTypeCore()
+    {
+        return AutomationControlType.TabItem;
+    }
+
+    public override object GetPattern(PatternInterface patternInterface)
+    {
+        if (patternInterface == PatternInterface.ItemContainer)
+        {
+            return this;
+        }
+
+        return base.GetPattern(patternInterface);
+    }
+
+    protected override AutomationPeer GetLabeledByCore()
+    {
+        if (_owner.Content is UIElement element)
+        {
+            return CreatePeerForElement(element);
+        }
+
+        return base.GetLabeledByCore();
+    }
+
+    protected override string GetNameCore()
+    {
+        var result = base.GetNameCore() ?? string.Empty;
+
+        if (result == string.Empty)
+        {
+            result = AutomationProperties.GetName(_owner);
+        }
+
+        if (result == string.Empty && _owner.Content is DependencyObject d)
+        {
+            result = AutomationProperties.GetName(d);
+        }
+
+        if (result == string.Empty && _owner.Content is string s)
+        {
+            result = s;
+        }
+
+        return result;
+    }
+}