Such a change is in progress.  I'm just about to stash some re-work of the core logic for `moc-focus' to have general support for most cases.  It's looking like 1k lines of rework and quite annoying.  I suspect there must be a better way.

I can fit visual lines by using their horizontal and vertical height after breaks to calculate what will provide the best aspect ratio.  Such a calculation with reasonable accuracy can be done in one step without troubling Emacs.  With some length of selection there is never anything I can do to make the text big, but we can make it pretty.

The fundamental issue remains that translating overlays after such a reflow is not so trivial.  That is unless I do the reflow within a buffer with editing commands after copying all of the necessary information over instead of stitching and welding overlays and strings together without the aid of a buffer.  This would allow some savings by re-using editing logic to preserve overlays and property applications to injected whitespace.  Instead of calculating things I can just read the final result of all the edits.  This seems more robust and I think I will implement the easiest and most relevant cases first:

- whitespace trimming of indentation

- whitespace injection to maintain column alignment of first line in source

- newline insertion to reflow long logical lines and match the target aspect ratio

I might just need a break lol.