Implement CharacterSpacing property in ButtonHandlers (#607)

.nuspec/Microsoft.Maui.Controls.MultiTargeting.targets

@@ -32,10 +32,6 @@
   <ItemGroup Condition="$(TargetFramework.Contains('-windows')) != true ">
     <Compile Remove="**\*.Windows.cs" />
     <None Include="**\*.Windows.cs" />
-    <Compile Remove="**\*.xaml.cs" />
-    <None Include="**\*.xaml.cs" />
-    <Compile Remove="**\*.xaml" />
-    <None Include="**\*.xaml" />
     <Compile Remove="**\Windows\*.cs" />
     <None Include="**\Windows\*.cs" />
   </ItemGroup>

src/Compatibility/Core/src/Android/FastRenderers/ButtonRenderer.cs

@@ -361,6 +361,7 @@ namespace Microsoft.Maui.Controls.Compatibility.Platform.Android.FastRenderers
 			_textColorSwitcher.Value.UpdateTextColor(this, Button.TextColor);
 		}
 
+		[PortHandler]
 		void UpdateCharacterSpacing()
 		{
 			if (Forms.IsLollipopOrNewer)

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

@@ -39,7 +39,6 @@ namespace Maui.Controls.Sample.Pages
 			var verticalStack = new VerticalStackLayout() { Spacing = 5, BackgroundColor = Color.AntiqueWhite };
 			var horizontalStack = new HorizontalStackLayout() { Spacing = 2, BackgroundColor = Color.CornflowerBlue };
 
-
 			verticalStack.Add(CreateSampleGrid());
 
 			verticalStack.Add(new Label { Text = " ", Padding = new Thickness(10) });
@@ -55,7 +54,7 @@ namespace Maui.Controls.Sample.Pages
 			verticalStack.Add(new Label { Text = loremIpsum, MaxLines = 2 });
 			verticalStack.Add(new Label { Text = loremIpsum, LineBreakMode = LineBreakMode.TailTruncation });
 			verticalStack.Add(new Label { Text = loremIpsum, MaxLines = 2, LineBreakMode = LineBreakMode.TailTruncation });
-			verticalStack.Add(new Label { Text = "This should have five times the line height!", LineHeight = 5 });
+			verticalStack.Add(new Label { Text = "This should have five times the line height! " + loremIpsum, LineHeight = 5, MaxLines = 2 });
 
 			var visibleClearButtonEntry = new Entry() { ClearButtonVisibility = ClearButtonVisibility.WhileEditing, Placeholder = "This Entry will show clear button if has input." };
 			var hiddenClearButtonEntry = new Entry() { ClearButtonVisibility = ClearButtonVisibility.Never, Placeholder = "This Entry will not..." };
@@ -64,14 +63,6 @@ namespace Maui.Controls.Sample.Pages
 			verticalStack.Add(hiddenClearButtonEntry);
 
 			verticalStack.Add(new Editor { Placeholder = "This is an editor placeholder." });
-			var paddingButton = new Button
-			{
-				Padding = new Thickness(40),
-				Text = "This button has a padding!!",
-				BackgroundColor = Color.Purple,
-			};
-
-			verticalStack.Add(paddingButton);
 
 			var underlineLabel = new Label { Text = "underline", TextDecorations = TextDecorations.Underline };
 			verticalStack.Add(underlineLabel);
@@ -99,10 +90,22 @@ namespace Maui.Controls.Sample.Pages
 
 			horizontalStack.Add(button);
 			horizontalStack.Add(button2);
+
 			horizontalStack.Add(new Label { Text = "And these buttons are in a HorizontalStackLayout", VerticalOptions = LayoutOptions.Center });
 
 			verticalStack.Add(horizontalStack);
 
+			var paddingButton = new Button
+			{
+				Padding = new Thickness(40),
+				Text = "This button has a padding!!",
+				BackgroundColor = Color.Purple,
+			};
+
+			verticalStack.Add(paddingButton);
+			verticalStack.Add(new Button { Text = "CharacterSpacing" });
+			verticalStack.Add(new Button { CharacterSpacing = 8, Text = "CharacterSpacing" });
+
 			verticalStack.Add(new CheckBox());
 			verticalStack.Add(new CheckBox { BackgroundColor = Color.LightPink });
 			verticalStack.Add(new CheckBox { IsChecked = true, Color = Color.Aquamarine });

src/Core/src/Handlers/Button/ButtonHandler.Android.cs

@@ -8,6 +8,8 @@ namespace Microsoft.Maui.Handlers
 {
 	public partial class ButtonHandler : AbstractViewHandler<IButton, AppCompatButton>
 	{
+		static Thickness? DefaultPadding;
+
 		ButtonClickListener ClickListener { get; } = new ButtonClickListener();
 		ButtonTouchListener TouchListener { get; } = new ButtonTouchListener();
 
@@ -21,6 +23,17 @@ namespace Microsoft.Maui.Handlers
 			return nativeButton;
 		}
 
+		protected override void SetupDefaults(AppCompatButton nativeView)
+		{
+			DefaultPadding = new Thickness(
+				nativeView.PaddingLeft,
+				nativeView.PaddingTop,
+				nativeView.PaddingRight,
+				nativeView.PaddingBottom);
+
+			base.SetupDefaults(nativeView);
+		}
+
 		protected override void ConnectHandler(AppCompatButton nativeView)
 		{
 			ClickListener.Handler = this;
@@ -58,6 +71,11 @@ namespace Microsoft.Maui.Handlers
 			handler.TypedNativeView?.UpdateTextColor(button);
 		}
 
+		public static void MapCharacterSpacing(ButtonHandler handler, IButton button)
+		{
+			handler.TypedNativeView?.UpdateCharacterSpacing(button);
+		}
+
 		public static void MapFont(ButtonHandler handler, IButton button)
 		{
 			_ = handler.Services ?? throw new InvalidOperationException($"{nameof(Services)} should have been set by base class.");
@@ -69,10 +87,10 @@ namespace Microsoft.Maui.Handlers
 
 		public static void MapPadding(ButtonHandler handler, IButton button)
 		{
-			handler.TypedNativeView?.UpdatePadding(button);
+			handler.TypedNativeView?.UpdatePadding(button, DefaultPadding);
 		}
 
-		public bool OnTouch(IButton? button, AView? v, MotionEvent? e)
+		bool OnTouch(IButton? button, AView? v, MotionEvent? e)
 		{
 			switch (e?.ActionMasked)
 			{
@@ -87,12 +105,12 @@ namespace Microsoft.Maui.Handlers
 			return false;
 		}
 
-		public void OnClick(IButton? button, AView? v)
+		void OnClick(IButton? button, AView? v)
 		{
 			button?.Clicked();
 		}
 
-		public class ButtonClickListener : Java.Lang.Object, AView.IOnClickListener
+		class ButtonClickListener : Java.Lang.Object, AView.IOnClickListener
 		{
 			public ButtonHandler? Handler { get; set; }
 
@@ -102,7 +120,7 @@ namespace Microsoft.Maui.Handlers
 			}
 		}
 
-		public class ButtonTouchListener : Java.Lang.Object, AView.IOnTouchListener
+		class ButtonTouchListener : Java.Lang.Object, AView.IOnTouchListener
 		{
 			public ButtonHandler? Handler { get; set; }
 

src/Core/src/Handlers/Button/ButtonHandler.Standard.cs

@@ -9,6 +9,7 @@ namespace Microsoft.Maui.Handlers
 		public static void MapBackgroundColor(ButtonHandler handler, IButton button) { }
 		public static void MapText(ButtonHandler handler, IButton button) { }
 		public static void MapTextColor(ButtonHandler handler, IButton button) { }
+		public static void MapCharacterSpacing(ButtonHandler handler, IButton button) { }
 		public static void MapFont(ButtonHandler handler, IButton button) { }
 		public static void MapPadding(ButtonHandler handler, IButton button) { }
 	}

src/Core/src/Handlers/Button/ButtonHandler.Windows.cs

@@ -59,6 +59,8 @@ namespace Microsoft.Maui.Handlers
 			handler.TypedNativeView?.UpdateTextColor(button, DefaultForeground);
 		}
 
+		public static void MapCharacterSpacing(ButtonHandler handler, IButton button) { }
+
 		public static void MapFont(ButtonHandler handler, IButton button)
 		{
 			_ = handler.Services ?? throw new InvalidOperationException($"{nameof(Services)} should have been set by base class.");

src/Core/src/Handlers/Button/ButtonHandler.cs

@@ -7,6 +7,7 @@ namespace Microsoft.Maui.Handlers
 			[nameof(IButton.BackgroundColor)] = MapBackgroundColor,
 			[nameof(IButton.Text)] = MapText,
 			[nameof(IButton.TextColor)] = MapTextColor,
+			[nameof(IButton.CharacterSpacing)] = MapCharacterSpacing,
 			[nameof(IButton.Font)] = MapFont,
 			[nameof(IButton.Padding)] = MapPadding,
 		};

src/Core/src/Handlers/Button/ButtonHandler.iOS.cs

@@ -59,6 +59,12 @@ namespace Microsoft.Maui.Handlers
 		{
 			handler.TypedNativeView?.UpdateTextColor(button, ButtonTextColorDefaultNormal, ButtonTextColorDefaultHighlighted, ButtonTextColorDefaultDisabled);
 		}
+
+		public static void MapCharacterSpacing(ButtonHandler handler, IButton button)
+		{
+			handler.TypedNativeView?.UpdateCharacterSpacing(button);
+		}
+
 		public static void MapPadding(ButtonHandler handler, IButton button)
 		{
 			handler.TypedNativeView?.UpdatePadding(button);

src/Core/src/Handlers/Label/LabelHandler.Android.cs

@@ -74,6 +74,7 @@ namespace Microsoft.Maui.Handlers
 
 			handler.TypedNativeView?.UpdateFont(label, fontManager);
 		}
+
 		public static void MapLineHeight(LabelHandler handler, ILabel label)
 		{
 			handler.TypedNativeView?.UpdateLineHeight(label, LineSpacingAddDefault, LineSpacingMultDefault);

src/Core/src/Platform/Android/ButtonExtensions.cs

@@ -24,6 +24,9 @@ namespace Microsoft.Maui
 		public static void UpdateTextColor(this AppCompatButton appCompatButton, IButton button, XColor defaultColor) =>
 			appCompatButton.SetTextColor(button.TextColor.Cleanse(defaultColor).ToNative());
 
+		public static void UpdateCharacterSpacing(this AppCompatButton appCompatButton, IButton button) =>
+			appCompatButton.LetterSpacing = button.CharacterSpacing.ToEm();
+
 		public static void UpdateFont(this AppCompatButton appCompatButton, IButton button, IFontManager fontManager)
 		{
 			var font = button.Font;
@@ -35,21 +38,26 @@ namespace Microsoft.Maui
 			appCompatButton.SetTextSize(ComplexUnitType.Sp, sp);
 		}
 
-		public static void UpdatePadding(this AppCompatButton appCompatButton, IButton button)
+		public static void UpdatePadding(this AppCompatButton appCompatButton, IButton button, Thickness? defaultPadding = null)
 		{
 			var context = appCompatButton.Context;
-
 			if (context == null)
-			{
 				return;
-			}
-			var padding = button.Padding;
+
+			// TODO: have a way to use default padding
+			//       Windows keeps the default as a base but this is also wrong.
+			// var padding = defaultPadding ?? new Thickness();
+			var padding = new Thickness();
+			padding.Left += context.ToPixels(button.Padding.Left);
+			padding.Top += context.ToPixels(button.Padding.Top);
+			padding.Right += context.ToPixels(button.Padding.Right);
+			padding.Bottom += context.ToPixels(button.Padding.Bottom);
 
 			appCompatButton.SetPadding(
-					(int)context.ToPixels(padding.Left),
-					(int)context.ToPixels(padding.Top),
-					(int)context.ToPixels(padding.Right),
-					(int)context.ToPixels(padding.Bottom));
+				(int)padding.Left,
+				(int)padding.Top,
+				(int)padding.Right,
+				(int)padding.Bottom);
 		}
 
 		static XColor Cleanse(this XColor color, XColor defaultColor) => color.IsDefault ? defaultColor : color;

src/Core/src/Platform/Windows/ControlExtensions.cs

@@ -23,6 +23,8 @@ namespace Microsoft.Maui
 
 		public static void UpdatePadding(this Control nativeControl, Thickness padding, UI.Xaml.Thickness? defaultThickness = null)
 		{
+			// TODO: have a way to reset the padding
+			//       This is used for button, but this also means there can never be a 0 padding button
 			var newPadding = defaultThickness ?? new UI.Xaml.Thickness();
 
 			newPadding.Left += padding.Left;

src/Core/src/Platform/iOS/ButtonExtensions.cs

@@ -1,4 +1,3 @@
-using Microsoft.Maui;
 using UIKit;
 
 namespace Microsoft.Maui
@@ -8,8 +7,8 @@ namespace Microsoft.Maui
 		public static void UpdateText(this UIButton nativeButton, IButton button) =>
 			nativeButton.SetTitle(button.Text, UIControlState.Normal);
 
-		public static void UpdateTextColor(this UIButton nativeButton, IButton button)
-			=> nativeButton.UpdateTextColor(button);
+		public static void UpdateTextColor(this UIButton nativeButton, IButton button) =>
+			nativeButton.UpdateTextColor(button);
 
 		public static void UpdateTextColor(this UIButton nativeButton, IButton button, UIColor? buttonTextColorDefaultNormal, UIColor? buttonTextColorDefaultHighlighted, UIColor? buttonTextColorDefaultDisabled)
 		{
@@ -31,6 +30,17 @@ namespace Microsoft.Maui
 			}
 		}
 
+		public static void UpdateCharacterSpacing(this UIButton nativeButton, IButton button)
+		{
+			if (string.IsNullOrEmpty(button.Text))
+				return;
+
+			var textAttr = nativeButton.TitleLabel.AttributedText?.WithCharacterSpacing(button.CharacterSpacing);
+
+			if (textAttr != null)
+				nativeButton.TitleLabel.AttributedText = textAttr;
+		}
+
 		public static void UpdateFont(this UIButton nativeButton, IButton button, IFontManager fontManager)
 		{
 			var uiFont = fontManager.GetFont(button.Font);

src/Core/tests/DeviceTests/Handlers/Button/ButtonHandlerTests.Android.cs

@@ -10,6 +10,32 @@ namespace Microsoft.Maui.DeviceTests
 {
 	public partial class ButtonHandlerTests
 	{
+		[Fact(DisplayName = "CharacterSpacing Initializes Correctly")]
+		public async Task CharacterSpacingInitializesCorrectly()
+		{
+			var xplatCharacterSpacing = 4;
+
+			var button = new ButtonStub()
+			{
+				CharacterSpacing = xplatCharacterSpacing,
+				Text = "Test"
+			};
+
+			float expectedValue = button.CharacterSpacing.ToEm();
+
+			var values = await GetValueAsync(button, (handler) =>
+			{
+				return new
+				{
+					ViewValue = button.CharacterSpacing,
+					NativeViewValue = GetNativeCharacterSpacing(handler)
+				};
+			});
+
+			Assert.Equal(xplatCharacterSpacing, values.ViewValue);
+			Assert.Equal(expectedValue, values.NativeViewValue, EmCoefficientPrecision);
+		}
+
 		[Theory(DisplayName = "Font Family Initializes Correctly")]
 		[InlineData(null)]
 		[InlineData("monospace")]
@@ -111,5 +137,17 @@ namespace Microsoft.Maui.DeviceTests
 
 		bool GetNativeIsItalic(ButtonHandler buttonHandler) =>
 			GetNativeButton(buttonHandler).Typeface.IsItalic;
+
+		double GetNativeCharacterSpacing(ButtonHandler buttonHandler)
+		{
+			var button = GetNativeButton(buttonHandler);
+
+			if (button != null)
+			{
+				return button.LetterSpacing;
+			}
+
+			return -1;
+		}
 	}
 }

src/Core/tests/DeviceTests/Handlers/Button/ButtonHandlerTests.iOS.cs

@@ -9,6 +9,31 @@ namespace Microsoft.Maui.DeviceTests
 {
 	public partial class ButtonHandlerTests
 	{
+		[Fact(DisplayName = "CharacterSpacing Initializes Correctly")]
+		public async Task CharacterSpacingInitializesCorrectly()
+		{
+			string originalText = "Test";
+			var xplatCharacterSpacing = 4;
+
+			var button = new ButtonStub()
+			{
+				CharacterSpacing = xplatCharacterSpacing,
+				Text = originalText
+			};
+
+			var values = await GetValueAsync(button, (handler) =>
+			{
+				return new
+				{
+					ViewValue = button.CharacterSpacing,
+					NativeViewValue = GetNativeCharacterSpacing(handler)
+				};
+			});
+
+			Assert.Equal(xplatCharacterSpacing, values.ViewValue);
+			Assert.Equal(xplatCharacterSpacing, values.NativeViewValue);
+		}
+
 		[Theory(DisplayName = "Font Family Initializes Correctly")]
 		[InlineData(null)]
 		[InlineData("Times New Roman")]
@@ -79,5 +104,14 @@ namespace Microsoft.Maui.DeviceTests
 
 		bool GetNativeIsItalic(ButtonHandler buttonHandler) =>
 			GetNativeButton(buttonHandler).TitleLabel.Font.FontDescriptor.SymbolicTraits.HasFlag(UIFontDescriptorSymbolicTraits.Italic);
+
+		double GetNativeCharacterSpacing(ButtonHandler buttonHandler)
+		{
+			var button = GetNativeButton(buttonHandler);
+
+			var attributedText = button.TitleLabel.AttributedText;
+
+			return attributedText.GetCharacterSpacing();
+		}
 	}
 }