Release v2.0.0-rc.6

Terminal.Gui/Views/TextInput/TextField/TextField.Commands.cs

@@ -522,6 +522,14 @@ public bool Copy ()
 
         App?.Clipboard?.SetClipboardData (SelectedText);
 
+        if (!ReadOnly)
+        {
+            return true;
+        }
+        _insertionPoint = 0;
+        ScrollOffset = 0;
+        ClearAllSelection ();
+
         return true;
     }
 

Terminal.Gui/Views/TextInput/TextField/TextField.cs

@@ -112,9 +112,12 @@ public TextField ()
 
     private void TextField_Initialized (object? sender, EventArgs e)
     {
-        _insertionPoint = GraphemeHelper.GetGraphemeCount (Text);
+        if (!ReadOnly)
+        {
+            _insertionPoint = GraphemeHelper.GetGraphemeCount (Text);
+        }
 
-        if (Viewport.Width > 0)
+        if (!ReadOnly && Viewport.Width > 0)
         {
             int colsWidth = Text.GetColumns ();
             ScrollOffset = colsWidth > Viewport.Width + 1 ? colsWidth - Viewport.Width + 1 : 0;
@@ -145,12 +148,27 @@ protected override void OnHasFocusChanged (bool newHasFocus, View? previousFocus
             App.Mouse.UngrabMouse ();
         }
 
-        // If gaining focus via keyboard (not mouse), select all text
-        if (newHasFocus && !_focusSetByMouse && _text.Count > 0)
+        // If gaining focus via keyboard (not mouse), select all text if not ReadOnly
+        if (newHasFocus && !ReadOnly && !_focusSetByMouse && _text.Count > 0)
         {
             SelectAll ();
         }
 
+        if (ReadOnly && InsertionPoint > 0)
+        {
+            _insertionPoint = 0;
+        }
+
+        if (ReadOnly && ScrollOffset > 0)
+        {
+            ScrollOffset = 0;
+        }
+
+        if (ReadOnly && SelectedLength > 0)
+        {
+            ClearAllSelection ();
+        }
+
         // Reset the flag after handling focus change
         _focusSetByMouse = false;
 

Tests/UnitTestsParallelizable/Views/TextFieldTests.cs

@@ -1539,4 +1539,125 @@ public void CtrlKey_With_AssociatedText_Does_Not_Insert_Into_TextField ()
 
         Assert.Equal ("", tf.Text);
     }
+
+    [Fact]
+    public void ReadOnly_ShouldNotAllowAutomaticallyScrolling_AndMustSetInsertionPointToZeroAtInitialization ()
+    {
+        TextField tf = new () { Width = 5, ReadOnly = true, Text = "hello world" };
+        tf.BeginInit ();
+        tf.EndInit ();
+
+        Assert.Equal (0, tf.InsertionPoint);
+        Assert.Equal (0, tf.ScrollOffset);
+        Assert.Null (tf.SelectedText);
+    }
+
+    [Fact]
+    public void ReadOnly_ShouldNotSelectAllText_OnFocus ()
+    {
+        TextField tf = new () { Width = 5, ReadOnly = true, Text = "hello world" };
+        tf.BeginInit ();
+        tf.EndInit ();
+
+        tf.SetFocus ();
+
+        Assert.Equal (0, tf.InsertionPoint);
+        Assert.Equal (0, tf.ScrollOffset);
+        Assert.Null (tf.SelectedText);
+    }
+
+     [Fact]
+     public void ReadOnly_ShouldSetInsertionPointAndScrollOffsetToZero_OnFocus ()
+     {
+         TextField tf = new () { Width = 5, ReadOnly = true, Text = "hello world" };
+         tf.BeginInit ();
+         tf.EndInit ();
+
+         // Move insertion point to end of text
+         tf.InsertionPoint = tf.Text.Length;
+         Assert.Equal (11, tf.InsertionPoint);
+         Assert.Equal (7, tf.ScrollOffset);
+
+         // Set focus and verify insertion point is still at zero
+         tf.SetFocus ();
+         Assert.Equal (0, tf.InsertionPoint);
+         Assert.Equal (0, tf.ScrollOffset);
+     }
+
+     [Fact]
+     public void ReadOnly_ShouldSetInsertionPointAndScrollOffsetToZero_LeavingFocus ()
+     {
+         TextField tf = new () { Width = 5, ReadOnly = true, Text = "hello world" };
+
+         // Create another view to take focus away
+         View otherView = new () { CanFocus = true };
+
+         // Create a container to hold both views
+         Runnable container = new () { Id = "container", Width = 20, Height = 5 };
+         container.Add (tf, otherView);
+         container.BeginInit ();
+         container.EndInit ();
+
+         // Set focus to TextField and verify insertion point and scroll offset are at zero
+         tf.SetFocus ();
+         Assert.Equal (0, tf.InsertionPoint);
+         Assert.Equal (0, tf.ScrollOffset);
+
+         // Move insertion point to end of text and then move focus away to verify insertion point is still at zero
+         tf.InsertionPoint = tf.Text.Length;
+         Assert.Equal (11, tf.InsertionPoint);
+         Assert.Equal (7, tf.ScrollOffset);
+
+         otherView.SetFocus ();
+         Assert.Equal (0, tf.InsertionPoint);
+         Assert.Equal (0, tf.ScrollOffset);
+     }
+
+     [Fact]
+     public void ReadOnly_ShouldSetInsertionPointAndScrollOffsetToZero_AfterCopyingText ()
+     {
+         TextField tf = new () { Width = 5, ReadOnly = true, Text = "hello world" };
+         tf.BeginInit ();
+         tf.EndInit ();
+
+         // Select all text
+         tf.SelectAll ();
+         Assert.Equal (11, tf.InsertionPoint);
+         Assert.Equal (7, tf.ScrollOffset);
+         Assert.Equal ("hello world", tf.SelectedText);
+
+         // Copy text and verify insertion point and scroll offset are still at zero
+         tf.Copy ();
+         Assert.Equal (0, tf.InsertionPoint);
+         Assert.Equal (0, tf.ScrollOffset);
+         Assert.Null (tf.SelectedText);
+     }
+
+     [Fact]
+     public void ReadOnly_ShouldSetInsertionPointAndScrollOffsetToZeroAndClearAllSelection_OnLeavingFocus ()
+     {
+         TextField tf = new () { Width = 5, ReadOnly = true, Text = "hello world" };
+
+         // Create another view to take focus away
+         View otherView = new () { CanFocus = true };
+
+         // Create a container to hold both views
+         Runnable container = new () { Id = "container", Width = 20, Height = 5 };
+         container.Add (tf, otherView);
+         container.BeginInit ();
+         container.EndInit ();
+
+         // Set focus to TextField and select all text
+         tf.SetFocus ();
+         tf.SelectAll ();
+         Assert.Equal (11, tf.InsertionPoint);
+         Assert.Equal (7, tf.ScrollOffset);
+         Assert.Equal ("hello world", tf.SelectedText);
+
+         // Move focus away and verify insertion point and scroll offset are at zero and selection is cleared
+         otherView.SetFocus ();
+         Assert.Equal (0, tf.InsertionPoint);
+         Assert.Equal (0, tf.ScrollOffset);
+         Assert.Null (tf.SelectedText);
+     }
 }