private Rect GetCaretRect()
{
Rect rect;
if (_editor is TextBox)
{
TextBox textBox = _editor as TextBox;
rect = textBox.GetRectFromCharacterIndex(textBox.CaretIndex);
}
else
{
RichTextBox richTextBox = _editor as RichTextBox;
rect = richTextBox.CaretPosition.GetCharacterRect(LogicalDirection.Forward);
}
rect.Location = _editor.PointToScreenLogical(rect.Location);
return(rect);
}