bug#56176: 28.1.50; csv-align-mode misaligns when display-line-numbers-mode is on

[Lars Ingebrigtsen]

Joost Kremers <joostkremers@fastmail.fm> writes:

> I work with csv files with long lines, which do not fit the window. If I
> activate csv-align-mode and display-line-numbers-mode, then move to the end 
> of a
> line (so that the first few columns are not visible anymore), the columns that
> are visible are no longer properly aligned. If I disable
> display-line-numbers-mode, they are propely aligned again.
>
> I could attach some screen shots showing the problem, but I'm not sure
> attachments are allowed here. Let me know if I should.

Attachments are allowed, but I can reproduce the problem without them.

The problem seems to be in the computations in csv--jit-align, which
don't take the line numbers mode area into account.  But after poking at
it for a couple of minutes, it's not immediately clear to me what the
algorithm is actually doing, so I've added Stefan to the CCs.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no