Adding Text pattern to DataGridViewTextBoxCell

src/System.Windows.Forms/src/System/Windows/Forms/DataGridViewTextBoxEditingControl.DataGridViewTextBoxEditingControlAccessibleObject.cs

@@ -17,9 +17,14 @@ internal class DataGridViewTextBoxEditingControlAccessibleObject : Control.Contr
             ///  The parent is changed when the editing control is attached to another editing cell.
             /// </summary>
             private AccessibleObject? _parentAccessibleObject;
+            private readonly TextBoxBase _owningDataGridViewTextBoxEditingControl;
+            private readonly TextBoxBaseUiaTextProvider _textProvider;
 
             public DataGridViewTextBoxEditingControlAccessibleObject(DataGridViewTextBoxEditingControl ownerControl) : base(ownerControl)
             {
+                _owningDataGridViewTextBoxEditingControl = ownerControl;
+                _textProvider = new TextBoxBaseUiaTextProvider(ownerControl);
+                UseTextProviders(_textProvider, _textProvider);
             }
 
             public override AccessibleObject? Parent => _parentAccessibleObject;
@@ -47,17 +52,23 @@ internal override UiaCore.IRawElementProviderFragmentRoot? FragmentRoot
                 {
                     UiaCore.UIA.ControlTypePropertyId => UiaCore.UIA.EditControlTypeId,
                     UiaCore.UIA.NamePropertyId => Name,
-                    UiaCore.UIA.IsValuePatternAvailablePropertyId => true,
+                    UiaCore.UIA.IsTextPatternAvailablePropertyId => IsPatternSupported(UiaCore.UIA.TextPatternId),
+                    UiaCore.UIA.IsTextPattern2AvailablePropertyId => IsPatternSupported(UiaCore.UIA.TextPattern2Id),
+                    UiaCore.UIA.IsValuePatternAvailablePropertyId => IsPatternSupported(UiaCore.UIA.ValuePatternId),
                     _ => base.GetPropertyValue(propertyID),
                 };
 
             internal override bool IsPatternSupported(UiaCore.UIA patternId)
                 => patternId switch
                 {
                     UiaCore.UIA.ValuePatternId => true,
+                    UiaCore.UIA.TextPatternId => true,
+                    UiaCore.UIA.TextPattern2Id => true,
                     _ => base.IsPatternSupported(patternId)
                 };
 
+            internal override bool IsReadOnly => _owningDataGridViewTextBoxEditingControl.ReadOnly;
+
             /// <summary>
             ///  Sets the parent accessible object for the node which can be added or removed to/from hierachy nodes.
             /// </summary>

src/System.Windows.Forms/tests/UnitTests/System/Windows/Forms/DataGridViewTextBoxEditingControl.DataGridViewTextBoxEditingControlAccessibleObjectTests.cs

@@ -0,0 +1,61 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Xunit;
+using static System.Windows.Forms.DataGridViewTextBoxEditingControl;
+using static Interop;
+
+namespace System.Windows.Forms.Tests
+{
+    public class DataGridViewTextBoxEditingControl_DataGridViewTextBoxEditingControlAccessibleObjectTests : IClassFixture<ThreadExceptionFixture>
+    {
+        [WinFormsFact]
+        public void DataGridViewTextBoxEditingControlAccessibleObject_Ctor_Default()
+        {
+            using DataGridViewTextBoxEditingControl textCellControl = new DataGridViewTextBoxEditingControl();
+            DataGridViewTextBoxEditingControlAccessibleObject accessibleObject = new DataGridViewTextBoxEditingControlAccessibleObject(textCellControl);
+            Assert.Equal(textCellControl, accessibleObject.Owner);
+        }
+
+        [WinFormsFact]
+        public void DataGridViewTextBoxEditingControlAccessibleObject_Ctor_ThrowsException_IfOwnerIsNull()
+        {
+            using DataGridViewTextBoxEditingControl textCellControl = new DataGridViewTextBoxEditingControl();
+            Assert.Throws<ArgumentNullException>(() => new DataGridViewTextBoxEditingControlAccessibleObject(null));
+        }
+
+        [WinFormsTheory]
+        [InlineData(true)]
+        [InlineData(false)]
+        public void ToolStripTextBoxControlAccessibleObject_IsReadOnly_IsExpected(bool readOnly)
+        {
+            using DataGridViewTextBoxEditingControl textCellControl = new DataGridViewTextBoxEditingControl();
+            textCellControl.ReadOnly = readOnly;
+            AccessibleObject accessibleObject = textCellControl.AccessibilityObject;
+            Assert.Equal(readOnly, accessibleObject.IsReadOnly);
+        }
+
+        [WinFormsTheory]
+        [InlineData((int)UiaCore.UIA.IsTextPatternAvailablePropertyId)]
+        [InlineData((int)UiaCore.UIA.IsTextPattern2AvailablePropertyId)]
+        [InlineData((int)UiaCore.UIA.IsValuePatternAvailablePropertyId)]
+        public void ToolStripTextBoxControlAccessibleObject_GetPropertyValue_PatternsSuported(int propertyID)
+        {
+            using DataGridViewTextBoxEditingControl textCellControl = new DataGridViewTextBoxEditingControl();
+            AccessibleObject accessibleObject = textCellControl.AccessibilityObject;
+            Assert.True((bool)accessibleObject.GetPropertyValue((UiaCore.UIA)propertyID));
+        }
+
+        [WinFormsTheory]
+        [InlineData((int)UiaCore.UIA.ValuePatternId)]
+        [InlineData((int)UiaCore.UIA.TextPatternId)]
+        [InlineData((int)UiaCore.UIA.TextPattern2Id)]
+        public void ToolStripTextBoxControlAccessibleObject_IsPatternSupported_PatternsSuported(int patternId)
+        {
+            using DataGridViewTextBoxEditingControl textCellControl = new DataGridViewTextBoxEditingControl();
+            AccessibleObject accessibleObject = textCellControl.AccessibilityObject;
+            Assert.True(accessibleObject.IsPatternSupported((UiaCore.UIA)patternId));
+        }
+    }
+}