Besides caret navigation, the functionality also includes making text selections across multiple sequential `NSTextView`s.
When this is fully implemented in the final project, I think I should try to get `NSTextView` working with `NSTextAttachment`. I do actually have that working, but I chose to abandon this approach temporarily because merging all the blocks into a single `NSTextView` caused problems with incorrect ranges.
Obviously, the problem is because of the logic that is either missing or incorrect somewhere in my code.
But Iām glad I now have the approach with separate text views mostly working.