bug#35737: xref--original-command

[Juri Linkov]

> "revert buffer" sounds like undoing changes, and we're repeating a search
> and refreshing (or maybe reloading) the results.

"revert buffer" is a standard term for updating an Emacs buffer.

> I get the idea, but not the goal. I know why we'd want to make
> xref-find-definitions and project-find-regexp to behave differently. The
> rest, I'm not so clear.
>
> Anyway, I was hoping my efforts in improving the default behavior would
> benefit your goals as well, but it seems the split between xref--show-xrefs
> and xref--show-defs goes against them. That's too bad.

Thanks for your efforts.  Your recent changes would be useful for other goals,
e.g. making the xref output to use grep-like output format.

>> The goal was to improve the default behavior to make customization easier.
>
> That's why I added xref-show-definitions-function.
>
> Customizing display-buffer-alist is an arcane art. The hook this variable
> provides should be easier to understand for an average user.
>
> So, to clarify, you're not interested in changing the *visible* default
> behavior, at least for now?

No, not a visual change this time.  I'd also close bug#33992 because
it's also leading nowhere.  But maybe your recent patch with
xref--definitions-buffer-mode is an improvement, I don't know.

I'm looking at xref from customization's point of view, and I see no more
improvements that could simplify xref customization.