[Android & iOS] Fix for SearchHandler Character Spacing Property (#29497)

* [Android & iOS] Fix for character spacing in searchHandler

* Updated test sample concerns

* Update on naming

* Update on formatting

* Allowing updating character spacing to zero

* Updated Andorid, iOS, Mac images

Author: SubhikshaSf4851

src/Controls/src/Core/Compatibility/Handlers/Shell/Android/SearchHandlerAppearanceTracker.cs

@@ -38,6 +38,7 @@ public SearchHandlerAppearanceTracker(IShellSearchView searchView, IShellContext
 			UpdateHorizontalTextAlignment();
 			UpdateVerticalTextAlignment();
 			UpdateInputType();
+			UpdateCharacterSpacing();
 		}
 
 		protected virtual void SearchHandlerPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
@@ -90,6 +91,17 @@ protected virtual void SearchHandlerPropertyChanged(object sender, System.Compon
 			{
 				UpdateText();
 			}
+			else if (e.Is(SearchHandler.CharacterSpacingProperty))
+			{
+				UpdateCharacterSpacing();
+			}
+		}
+		void UpdateCharacterSpacing()
+		{
+			if (_editText is not null)
+			{
+				_editText.LetterSpacing = _searchHandler.CharacterSpacing.ToEm();
+			}
 		}
 
 		void UpdateText()

src/Controls/src/Core/Compatibility/Handlers/Shell/iOS/SearchHandlerAppearanceTracker.cs

@@ -119,6 +119,10 @@ void SearchHandlerPropertyChanged(object sender, System.ComponentModel.PropertyC
 			{
 				UpdateText(_uiSearchBar.FindDescendantView<UITextField>());
 			}
+			else if (e.Is(SearchHandler.CharacterSpacingProperty))
+			{
+				UpdateCharacterSpacing(_uiSearchBar.FindDescendantView<UITextField>());
+			}
 		}
 
 		void UpdateText(UITextField uiTextField)
@@ -128,6 +132,27 @@ void UpdateText(UITextField uiTextField)
 
 			uiTextField.Text = _searchHandler.Query;
 			UpdateTextTransform(uiTextField);
+			UpdateCharacterSpacing(uiTextField);
+		}
+
+		void UpdateCharacterSpacing(UITextField textField)
+		{
+			if (textField is null)
+			{
+				return;
+			}
+
+			var attributedText = textField.AttributedText?.WithCharacterSpacing(_searchHandler.CharacterSpacing);
+			if (attributedText is not null)
+			{
+				textField.AttributedText = attributedText;
+			}
+
+			var placeholderAttributedText = textField.AttributedPlaceholder?.WithCharacterSpacing(_searchHandler.CharacterSpacing);
+			if (placeholderAttributedText is not null)
+			{
+				textField.AttributedPlaceholder = placeholderAttributedText;
+			}
 		}
 
 		void GetDefaultSearchBarColors(UISearchBar searchBar)

src/Controls/tests/TestCases.Android.Tests/snapshots/android/CharacterSpacingShouldApply.png

@@ -0,0 +1,44 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, "29492", "CharacterSpacing should be applied", PlatformAffected.Android | PlatformAffected.iOS)]
+public class Issue29492 : TestShell
+{
+    protected override void Init()
+    {
+        var shellContent = new ShellContent
+        {
+            Title = "Home",
+            Content = new Issue29492ContentPage() { Title = "Home" }
+        };
+
+        Items.Add(shellContent);
+    }
+
+    class Issue29492ContentPage : ContentPage
+    {
+        public Issue29492ContentPage()
+        {
+            var searchHandler = new SearchHandler
+            {
+                CharacterSpacing = 10
+            };
+
+            var button = new Button
+            {
+                Text = "Enter Text",
+                AutomationId = "Entertext",
+                HorizontalOptions = LayoutOptions.Center,
+                VerticalOptions = LayoutOptions.Center,
+            };
+
+            button.Clicked += (s, e) =>
+            {
+                searchHandler.Query = "Hello World";
+            };
+
+            Shell.SetSearchHandler(this, searchHandler);
+
+            Content = button;
+        }
+    }
+}

src/Controls/tests/TestCases.HostApp/Issues/Issue29492.cs

@@ -0,0 +1,25 @@
+#if TEST_FAILS_ON_WINDOWS  // Windows Character Spacing Issue Link - https://github.com/dotnet/maui/issues/29493 
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+public class Issue29492 : _IssuesUITest
+{
+    public Issue29492(TestDevice device)
+        : base(device)
+    {
+    }
+
+    public override string Issue => "CharacterSpacing should be applied";
+
+    [Test]
+    [Category(UITestCategories.Shell)]
+    public void CharacterSpacingShouldApply()
+    {
+        App.WaitForElement("Entertext");
+        App.Tap("Entertext");
+        VerifyScreenshot();
+    }
+}
+#endif