Hello,

When we resize the syntaxEditor control, the folding buttons moved. You can reproduce this isssue in your demos.

 

1. Reduce the contents of the sample
2. Increase the size of sample window and see the buttons are not besides the line

 

Best regards,

The GotoLine method is not implemented

For example "//====" will not be commented in C#. 

If you have an XML attribute with a string value, but the value is not fully rendered into the viewport, its color defaults to black, instead of the expected blue color.

To work this around, you can create a custom XmlTagger and override its GetTags() method. This will allow you to properly catch the string value and return it as a tag span element with its ClassificationType set to "string".

If secondary wpf window is opened in an application, the enter key does not work in SyntaxEditor. It does not produce new line as expected.

When the control is inside ScrollViewer and you click it, focus is lost and caret disappears. Some controls have built in ScrollViewer , for example LayoutControl so placing the editor in LayoutControl also leads to the same issue.

Generally placing the syntaxeditor in scrollviewer is risky for the vertical virtualization so at least a height should be set to the control. In R2 2020 SP, an exception will be thrown if Syntax Editor with no height is added in scroll viewer or stack panel or other panel which measures vertically with infinity.

Workaround for this issue:

        private void syntaxEditor_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            e.Handled = true;
        }

In some scenarios, an ArgumentException is thrown when a folding region with selected text is collapsed. An example can be seen below:

After putting a folding region out of the viewport by scrolling and then bringing it back, the folding region is not drawn correctly when typing new lines into it.

The highlighting of tags becomes invalid when scrolling horizontally.

/* and */ words are start /end words for multiline comments in C#/SQL/VB 

They should be outside strings when they form a comment block.

Big text with many lines or lines long enough to cover the viewport height when wrapped with word wrapping break the virtualization mechanism in RadSyntaxEditor. This makes the scrolling and resizing performance slow.

Enter key is improperly handled internally and this results in inability to use the key in combination with other modifier keys for custom commands.

For example this custom code completion command does not fire when pressing Ctrl + Enter:

        private void syntaxEditor_Loaded(object sender, RoutedEventArgs e)
        {
            var completionCommand = this.syntaxEditor.Commands.CodeCompletionCommand;
            InputBinding keyBinding = null;
            foreach (InputBinding item in this.syntaxEditor.EditorPresenter.Caret.InputBindings)
            {
                if (item.Command == completionCommand)
                {
                    keyBinding = item;
                    break;
                }
            }

            // unregister old key binding via Caret InputBindings
            this.syntaxEditor.EditorPresenter.Caret.InputBindings.Remove(keyBinding);

            // register new command in Syntaxeditor
            this.syntaxEditor.KeyBindings.RegisterCommand(completionCommand, Key.Enter, ModifierKeys.Control);
        }

Searching "windows" in the text "Windows Windows Windows" with option MatchCase highlights all windows which is wrong - no highlight should be performed

Folding tagger does not work for other languages than C#.

'Cannot find resource named 'DragVisualStyle' error occurs in in the error list when using implicit styles.

SyntaxEditor showing XML/Html/XAML File and XMlFoldingTagger is registered.

Deleting the last bracket symbol ">" results in exception in XMLFoldingTagger.cs

SyntaxEditor is in RadListBoxItem.

Entering space key does not produce text change and gets the focus lost our of the editor.

Workaround:

    private void RadSyntaxEditor_PreviewKeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Space)
            {
                (sender as RadSyntaxEditor).Insert(" ");
                e.Handled = true;
            }
        }

For example:

some text // some comment

some text 2 // some comment 2

Specified argument was out of the range of valid values.
Parameter name: span

 

StackTrace:

at Telerik.Windows.SyntaxEditor.Core.Text.DataStructures.ConcatenationRopeNode.GetText(Span span) in C:\WPF_Scrum\Current\Controls\SyntaxEditor\SyntaxEditor.Core\Text\DataStructures\ConcatenationRopeNode.cs:line 140
   at Telerik.Windows.SyntaxEditor.Core.Text.TextSnapshot.GetText(Span span) in C:\WPF_Scrum\Current\Controls\SyntaxEditor\SyntaxEditor.Core\Text\TextSnapshot.cs:line 118
   at Telerik.Windows.Controls.SyntaxEditor.Taggers.CSharpFoldingTagger.GetFoldingRegionTitle(String inputValue, Span span, String startText) in C:\WPF_Scrum\Current\Controls\SyntaxEditor\SyntaxEditor\Taggers\Folding\CSharpFoldingTagger.cs:line 202

Keyboard focus is lost on CompletionListWindow when setting runtime new collection to the CompletionListItems property. The values inside CompletionListWindow can't be selected through the keyboard arrow keys.