Implement CharacterSpacing property in EntryHandlers (#566)

* CharacterSpacing  added in Entry

* PortHandled attribute added.

src/Compatibility/Core/src/Android/Renderers/EntryRenderer.cs

@@ -390,6 +390,7 @@ namespace Microsoft.Maui.Controls.Compatibility.Platform.Android
 				EditText.Text = currentControlText.Substring(0, Element.MaxLength);
 		}
 
+		[PortHandler]
 		void UpdateCharacterSpacing()
 		{
 			if (Forms.IsLollipopOrNewer)

src/Compatibility/Core/src/iOS/Renderers/EntryRenderer.cs

@@ -375,6 +375,7 @@ namespace Microsoft.Maui.Controls.Compatibility.Platform.iOS
 				Control.Text = text;
 		}
 
+		[PortHandler ("Partially ported ...")]
 		void UpdateCharacterSpacing()
 		{
 			var textAttr = Control.AttributedText.AddCharacterSpacing(Element.Text, Element.CharacterSpacing);

src/Controls/samples/Controls.Sample/Pages/MainPage.cs

@@ -101,6 +101,7 @@ namespace Maui.Controls.Sample.Pages
 			verticalStack.Add(new Entry { Placeholder = "This should be placeholder text" });
 			verticalStack.Add(new Entry { Text = "This should be read only property", IsReadOnly = true });
 			verticalStack.Add(new Entry { MaxLength = 5, Placeholder = "MaxLength text" });
+			verticalStack.Add(new Entry { Text = "This should be text with character spacing", CharacterSpacing = 10 });
 
 			verticalStack.Add(new ProgressBar { Progress = 0.5 });
 			verticalStack.Add(new ProgressBar { Progress = 0.5, BackgroundColor = Color.LightCoral });

src/Core/src/Handlers/Entry/EntryHandler.Android.cs

@@ -89,6 +89,11 @@ namespace Microsoft.Maui.Handlers
 			handler.TypedNativeView?.UpdateReturnType(entry);
 		}
 
+		public static void MapCharacterSpacing(EntryHandler handler, IEntry entry)
+		{
+			handler.TypedNativeView?.UpdateCharacterSpacing(entry);
+		}
+
 		void OnTextChanged(string? text)
 		{
 			if (VirtualView == null || TypedNativeView == null)

src/Core/src/Handlers/Entry/EntryHandler.Standard.cs

@@ -16,5 +16,6 @@ namespace Microsoft.Maui.Handlers
 		public static void MapIsReadOnly(IViewHandler handler, IEntry entry) { }
 		public static void MapFont(IViewHandler handler, IEntry entry) { }
 		public static void MapReturnType(IViewHandler handler, IEntry entry) { }
+		public static void MapCharacterSpacing(IViewHandler handler, IEntry entry) { }
 	}
 }

src/Core/src/Handlers/Entry/EntryHandler.cs

@@ -13,7 +13,8 @@
 			[nameof(IEntry.Placeholder)] = MapPlaceholder,
 			[nameof(IEntry.IsReadOnly)] = MapIsReadOnly,
 			[nameof(IEntry.Font)] = MapFont,
-			[nameof(IEntry.ReturnType)] = MapReturnType
+			[nameof(IEntry.ReturnType)] = MapReturnType,
+			[nameof(IEntry.CharacterSpacing)] = MapCharacterSpacing
 		};
 
 		public EntryHandler() : base(EntryMapper)

src/Core/src/Handlers/Entry/EntryHandler.iOS.cs

@@ -114,6 +114,11 @@ namespace Microsoft.Maui.Handlers
 			handler.TypedNativeView?.UpdateHorizontalTextAlignment(entry);
 		}
 
+		public static void MapCharacterSpacing(EntryHandler handler, IEntry entry)
+		{
+			handler.TypedNativeView?.UpdateCharacterSpacing(entry);
+		}
+
 		void OnEditingChanged(object? sender, EventArgs e) => OnTextChanged();
 
 		void OnEditingEnded(object? sender, EventArgs e) => OnTextChanged();

src/Core/src/Platform/Android/EditTextExtensions.cs

@@ -139,6 +139,11 @@ namespace Microsoft.Maui
 			editText.LetterSpacing = editor.CharacterSpacing.ToEm();
 		}
 
+		public static void UpdateCharacterSpacing(this AppCompatEditText editText, IEntry editor)
+		{
+			editText.LetterSpacing = editor.CharacterSpacing.ToEm();
+		}
+
 		internal static void SetInputType(this AppCompatEditText editText, IEntry entry)
 		{
 			editText.InputType = InputTypes.ClassText;

src/Core/src/Platform/iOS/TextFieldExtensions.cs

@@ -91,6 +91,14 @@ namespace Microsoft.Maui
 				textField.AttributedText = textAttr;
 		}
 
+		public static void UpdateCharacterSpacing(this UITextField textField, IEntry textView)
+		{
+			var textAttr = textField.AttributedText?.WithCharacterSpacing(textView.CharacterSpacing);
+
+			if (textAttr != null)
+				textField.AttributedText = textAttr;
+		}
+
 		public static void UpdateFont(this UITextField textField, IText textView, IFontManager fontManager)
 		{
 			var uiFont = fontManager.GetFont(textView.Font);

src/Core/tests/DeviceTests/Handlers/Entry/EntryHandlerTests.Android.cs

@@ -142,5 +142,43 @@ namespace Microsoft.Maui.DeviceTests
 
 		ImeAction GetNativeReturnType(EntryHandler entryHandler) =>
 			GetNativeEntry(entryHandler).ImeOptions;
+
+		[Fact(DisplayName = "CharacterSpacing Initializes Correctly")]
+		public async Task CharacterSpacingInitializesCorrectly()
+		{
+			var xplatCharacterSpacing = 4;
+
+			var entry = new EntryStub()
+			{
+				CharacterSpacing = xplatCharacterSpacing,
+				Text = "Some Test Text"
+			};
+
+			float expectedValue = entry.CharacterSpacing.ToEm();
+
+			var values = await GetValueAsync(entry, (handler) =>
+			{
+				return new
+				{
+					ViewValue = entry.CharacterSpacing,
+					NativeViewValue = GetNativeCharacterSpacing(handler)
+				};
+			});
+
+			Assert.Equal(xplatCharacterSpacing, values.ViewValue);
+			Assert.Equal(expectedValue, values.NativeViewValue, EmCoefficientPrecision);
+		}
+
+		double GetNativeCharacterSpacing(EntryHandler entryHandler)
+		{
+			var editText = GetNativeEntry(entryHandler);
+
+			if (editText != null)
+			{
+				return editText.LetterSpacing;
+			}
+
+			return -1;
+		}
 	}
 }

src/Core/tests/DeviceTests/Handlers/Entry/EntryHandlerTests.iOS.cs

@@ -85,6 +85,37 @@ namespace Microsoft.Maui.DeviceTests
 			Assert.Equal(expectedValue, values.NativeViewValue);
 		}
 
+		[Fact(DisplayName = "CharacterSpacing Initializes Correctly")]
+		public async Task CharacterSpacingInitializesCorrectly()
+		{
+			string originalText = "Some Test Text";
+			var xplatCharacterSpacing = 4;
+
+			var entry = new EntryStub()
+			{
+				CharacterSpacing = xplatCharacterSpacing,
+				Text = originalText
+			};
+
+			var values = await GetValueAsync(entry, (handler) =>
+			{
+				return new
+				{
+					ViewValue = entry.CharacterSpacing,
+					NativeViewValue = GetNativeCharacterSpacing(handler)
+				};
+			});
+
+			Assert.Equal(xplatCharacterSpacing, values.ViewValue);
+			Assert.Equal(xplatCharacterSpacing, values.NativeViewValue);
+		}
+
+		double GetNativeCharacterSpacing(EntryHandler entryHandler)
+		{
+			var entry = GetNativeEntry(entryHandler);
+			return entry.AttributedText.GetCharacterSpacing();
+		}
+
 		UITextField GetNativeEntry(EntryHandler entryHandler) =>
 			(UITextField)entryHandler.View;