Implement IsTextPredictionEnabled property on Editor (#515)

* Initial implementation

* Added Tests

* Added PortHandler Attributes

* Added Tests

* Handle turning text prediction back on

Co-authored-by: E.Z. Hart <[email protected]>

Author: hevey

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

@@ -216,6 +216,7 @@ protected virtual void UpdateFont()
 			EditText.SetTextSize(ComplexUnitType.Sp, (float)Element.FontSize);
 		}
 
+		[PortHandler("Partially Ported")]
 		void UpdateInputType()
 		{
 			Editor model = Element;

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

@@ -306,6 +306,7 @@ protected internal virtual void UpdateFont()
 			TextView.Font = font;
 		}
 
+		[PortHandler("Partially Ported")]
 		void UpdateKeyboard()
 		{
 			var keyboard = Element.Keyboard;

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

@@ -85,6 +85,7 @@ void SetupMauiLayout()
 
 			verticalStack.Add(new Editor());
 			verticalStack.Add(new Editor { Text = "Editor" });
+			verticalStack.Add(new Editor { Text = "Predictive Text Off", IsTextPredictionEnabled = false });
 
 			var entry = new Entry();
 			entry.TextChanged += (sender, e) =>

src/Core/src/Core/IEditor.cs

@@ -5,6 +5,9 @@
 	/// </summary>
 	public interface IEditor : IView, IText
 	{
-
+		/// <summary>
+		/// Gets a value that controls whether text prediction and automatic text correction is on or off.
+		/// </summary>
+		bool IsTextPredictionEnabled { get; }
 	}
 }

src/Core/src/Handlers/Editor/EditorHandler.Android.cs

@@ -30,5 +30,10 @@ public static void MapCharacterSpacing(EditorHandler handler, IEditor editor)
 		{
 			handler.TypedNativeView?.UpdateCharacterSpacing(editor);
 		}
+			
+		public static void MapPredictiveText(EditorHandler handler, IEditor editor)
+		{
+			handler.TypedNativeView?.UpdatePredictiveText(editor);
+		}
 	}
 }

src/Core/src/Handlers/Editor/EditorHandler.Standard.cs

@@ -7,6 +7,9 @@ public partial class EditorHandler : AbstractViewHandler<IEditor, object>
 		protected override object CreateNativeView() => throw new NotImplementedException();
 
 		public static void MapText(IViewHandler handler, IEditor editor) { }
+
 		public static void MapCharacterSpacing(IViewHandler handler, IEditor editor) { }
+		
+		public static void MapPredictiveText(EditorHandler handler, IEditor editor) { }
 	}
 }

src/Core/src/Handlers/Editor/EditorHandler.cs

@@ -5,7 +5,8 @@ public partial class EditorHandler
 		public static PropertyMapper<IEditor, EditorHandler> EditorMapper = new PropertyMapper<IEditor, EditorHandler>(ViewHandler.ViewMapper)
 		{
 			[nameof(IEditor.Text)] = MapText,
-			[nameof(IEditor.CharacterSpacing)] = MapCharacterSpacing
+			[nameof(IEditor.CharacterSpacing)] = MapCharacterSpacing,
+			[nameof(IEditor.IsTextPredictionEnabled)] = MapPredictiveText
 		};
 
 		public EditorHandler() : base(EditorMapper)

src/Core/src/Handlers/Editor/EditorHandler.iOS.cs

@@ -1,4 +1,5 @@
-using CoreGraphics;
+using System;
+using CoreGraphics;
 using UIKit;
 
 namespace Microsoft.Maui.Handlers
@@ -24,5 +25,10 @@ public static void MapCharacterSpacing(EditorHandler handler, IEditor editor)
 		{
 			handler.TypedNativeView?.UpdateCharacterSpacing(editor);
 		}
+			
+		public static void MapPredictiveText(EditorHandler handler, IEditor editor)
+		{
+			handler.TypedNativeView?.UpdatePredictiveText(editor);
+		}
 	}
 }

src/Core/src/Platform/Android/EditorExtensions.cs

@@ -1,4 +1,5 @@
-using AndroidX.AppCompat.Widget;
+using Android.Text;
+using AndroidX.AppCompat.Widget;
 
 namespace Microsoft.Maui
 {
@@ -23,5 +24,13 @@ public static void UpdateCharacterSpacing(this AppCompatEditText editText, IEdit
 		{
 			editText.LetterSpacing = editor.CharacterSpacing.ToEm();
 		}
+			
+		public static void UpdatePredictiveText(this AppCompatEditText editText, IEditor editor)
+		{
+			if(editor.IsTextPredictionEnabled)
+				return;
+			
+			editText.InputType |= InputTypes.TextFlagNoSuggestions;
+		}
 	}
 }

src/Core/src/Platform/iOS/EditorExtensions.cs

@@ -23,5 +23,11 @@ public static void UpdateCharacterSpacing(this UITextView textView, IEditor edit
 
 			// TODO: Include AttributedText to Label Placeholder
 		}
+		
+		public static void UpdatePredictiveText(this UITextView textView, IEditor editor)
+		{
+			textView.AutocorrectionType = editor.IsTextPredictionEnabled 
+				? UITextAutocorrectionType.Yes : UITextAutocorrectionType.No;
+		}
 	}
 }

src/Core/tests/DeviceTests/Handlers/Editor/EditorHandlerTests.Android.cs

@@ -1,7 +1,8 @@
-using System.Threading.Tasks;
+using Android.Text;
 using AndroidX.AppCompat.Widget;
 using Microsoft.Maui.DeviceTests.Stubs;
 using Microsoft.Maui.Handlers;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace Microsoft.Maui.DeviceTests
@@ -39,6 +40,9 @@ AppCompatEditText GetNativeEditor(EditorHandler editorHandler) =>
 
 		string GetNativeText(EditorHandler editorHandler) =>
 			GetNativeEditor(editorHandler).Text;
+		
+		bool GetNativeIsTextPredictionEnabled(EditorHandler editorHandler) =>
+			!GetNativeEditor(editorHandler).InputType.HasFlag(InputTypes.TextFlagNoSuggestions);
 
         double GetNativeCharacterSpacing(EditorHandler editorHandler)
         {

src/Core/tests/DeviceTests/Handlers/Editor/EditorHandlerTests.cs

@@ -46,5 +46,18 @@ await ValidatePropertyUpdatesValue(
 				setValue,
 				unsetValue);
 		}
+		
+		[Theory(DisplayName = "Is Text Prediction Enabled")]
+		[InlineData(true)]
+		[InlineData(false)]
+		public async Task IsTextPredictionEnabledCorrectly(bool isEnabled)
+		{
+			var editor = new EditorStub()
+			{
+				IsTextPredictionEnabled = isEnabled
+			};
+
+			await ValidatePropertyInitValue(editor, () => editor.IsTextPredictionEnabled, GetNativeIsTextPredictionEnabled, isEnabled);
+		}
 	}
 }

src/Core/tests/DeviceTests/Handlers/Editor/EditorHandlerTests.iOS.cs

@@ -44,5 +44,8 @@ double GetNativeCharacterSpacing(EditorHandler editorHandler)
             var editor = GetNativeEditor(editorHandler);
             return editor.AttributedText.GetCharacterSpacing();
         }
-    }
+		
+		bool GetNativeIsTextPredictionEnabled(EditorHandler editorHandler) =>
+			GetNativeEditor(editorHandler).AutocorrectionType == UITextAutocorrectionType.Yes;
+	}
 }

src/Core/tests/DeviceTests/Stubs/EditorStub.cs

@@ -9,5 +9,7 @@ public partial class EditorStub : StubBase, IEditor
 		public Font Font { get; set; }
 
 		public double CharacterSpacing { get; set; }
+
+		public bool IsTextPredictionEnabled { get; set; }
 	}
 }