feat: Support PasswordBox on Skia

src/Uno.UI.Runtime.Skia.Gtk/UI/Xaml/Controls/TextBoxViewExtension.cs

@@ -13,6 +13,7 @@
 using Object = GLib.Object;
 using Point = Windows.Foundation.Point;
 using Scale = Pango.Scale;
+using System.Diagnostics;
 
 namespace Uno.UI.Runtime.Skia.GTK.Extensions.UI.Xaml.Controls
 {
@@ -38,7 +39,7 @@ public TextBoxViewExtension(TextBoxView owner, GtkWindow window)
 		private Fixed GetWindowTextInputLayer()
 		{
 			// now we have the GtkEventBox
-			var overlay = (Overlay)((EventBox) _window.Child).Child;
+			var overlay = (Overlay)((EventBox)_window.Child).Child;
 			return overlay.Children.OfType<Fixed>().First();
 		}
 
@@ -53,7 +54,7 @@ public void StartEntry()
 
 			_contentElement = textBox.ContentElement;
 
-			EnsureWidgetForAcceptsReturn(textBox.AcceptsReturn);
+			EnsureWidgetForAcceptsReturn(textBox.AcceptsReturn, isPassword: textBox is PasswordBox);
 			var textInputLayer = GetWindowTextInputLayer();
 			textInputLayer.Put(_currentInputWidget!, 0, 0);
 
@@ -107,7 +108,7 @@ public void UpdateNativeView()
 				return;
 			}
 
-			EnsureWidgetForAcceptsReturn(textBox.AcceptsReturn);
+			EnsureWidgetForAcceptsReturn(textBox.AcceptsReturn, isPassword: textBox is PasswordBox);
 
 			var fontDescription = new FontDescription
 			{
@@ -170,24 +171,29 @@ private void UpdateEntryProperties(Entry entry, TextBox textBox)
 		{
 			entry.IsEditable = !textBox.IsReadOnly;
 			entry.MaxLength = textBox.MaxLength;
-
 		}
 
-		private void EnsureWidgetForAcceptsReturn(bool acceptsReturn)
+		private void EnsureWidgetForAcceptsReturn(bool acceptsReturn, bool isPassword)
 		{
+			// On UWP, A PasswordBox doesn't have AcceptsReturn property.
+			// The property exists on Uno because PasswordBox incorrectly inherits TextBox.
+			// If we have PasswordBox, ignore AcceptsReturnValue and always use Gtk.Entry
+			acceptsReturn = acceptsReturn && !isPassword;
+
 			var isIncompatibleInputType =
 				(acceptsReturn && !(_currentInputWidget is TextView)) ||
 				(!acceptsReturn && !(_currentInputWidget is Entry));
 			if (isIncompatibleInputType)
 			{
 				var inputText = GetInputText();
-				_currentInputWidget = CreateInputWidget(acceptsReturn);
+				_currentInputWidget = CreateInputWidget(acceptsReturn, isPassword);
 				SetWidgetText(inputText ?? string.Empty);
 			}
 		}
 
-		private Widget CreateInputWidget(bool acceptsReturn)
+		private Widget CreateInputWidget(bool acceptsReturn, bool isPassword)
 		{
+			Debug.Assert(!acceptsReturn || !isPassword);
 			Widget widget;
 			if (acceptsReturn)
 			{
@@ -199,6 +205,12 @@ private Widget CreateInputWidget(bool acceptsReturn)
 			else
 			{
 				var entry = new Entry();
+				if (isPassword)
+				{
+					entry.InputPurpose = InputPurpose.Password;
+					entry.Visibility = false;
+				}
+
 				entry.Changed += WidgetTextChanged;
 				_textChangedDisposable.Disposable = Disposable.Create(() => entry.Changed -= WidgetTextChanged);
 				widget = entry;
@@ -261,5 +273,15 @@ private void ContentElementSizeChanged(object sender, Windows.UI.Xaml.SizeChange
 			UpdateSize();
 			UpdatePosition();
 		}
+
+		public void SetIsPassword(bool isPassword)
+		{
+			if (_currentInputWidget is Entry entry)
+			{
+				entry.Visibility = !isPassword;
+				// InputPurpose doesn't have any visual effects.
+				entry.InputPurpose = InputPurpose.Password;
+			}
+		}
 	}
 }

src/Uno.UI.Runtime.Skia.Wpf/Extensions/UI/Xaml/Controls/TextBoxViewExtension.cs

@@ -183,5 +183,9 @@ private void ContentElementSizeChanged(object sender, Windows.UI.Xaml.SizeChange
 			UpdatePosition();
 		}
 
+		public void SetIsPassword(bool isPassword)
+		{
+			// No support for now.
+		}
 	}
 }

src/Uno.UI/UI/Xaml/Controls/PasswordBox/PasswordBox.skia.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Windows.UI.Xaml.Controls
+{
+	public partial class PasswordBox
+	{
+		partial void SetPasswordScope(bool shouldHideText)
+		{
+			SetIsPassword(shouldHideText);
+		}
+	}
+}

src/Uno.UI/UI/Xaml/Controls/TextBox/ITextBoxExtension.skia.cs

@@ -15,5 +15,7 @@ internal interface ITextBoxViewExtension
 		void UpdatePosition();
 
 		void SetTextNative(string text);
-    }
+
+		void SetIsPassword(bool isPassword);
+	}
 }

src/Uno.UI/UI/Xaml/Controls/TextBox/TextBox.skia.cs

@@ -22,5 +22,7 @@ private void UpdateTextBoxView()
 		}
 
 		partial void OnFocusStateChangedPartial(FocusState focusState) => _textBoxView?.OnFocusStateChanged(focusState);
+
+		protected void SetIsPassword(bool isPassword) => _textBoxView?.SetIsPassword(isPassword);
 	}
 }

src/Uno.UI/UI/Xaml/Controls/TextBox/TextBoxView.skia.cs

@@ -45,7 +45,7 @@ public TextBox? TextBox
 
 		internal void SetTextNative(string text)
 		{
-			DisplayBlock.Text = text;
+			DisplayBlock.Text = new string('•', text.Length);
 			_textBoxExtension?.SetTextNative(text);
 		}
 
@@ -65,6 +65,8 @@ internal void OnFocusStateChanged(FocusState focusState)
 			}
 		}
 
+		internal void SetIsPassword(bool isPassword) => _textBoxExtension?.SetIsPassword(isPassword);
+
 		internal void UpdateTextFromNative(string newText)
 		{
 			var textBox = _textBox?.GetTarget();