Re: something like linum.el ought to be added

[Davis Herring]

> I see what you mean; the main complication is that existing overlays
> can still be necessary in other windows that show the same buffer. So
> making all overlays available for (re-)consumption would entail
> walking all visible windows and adjusting (new or existing) overlays
> where necessary, which is not a clear improvement over the current
> approach (i.e., keeping overlays in place once they are created, and
> only changing those in the visible portion of the current window), in
> particular since the number of overlays seems to be no problem so far.

If you only change them in the visible portion of the current window, does
that mean that line-number overlays in other windows on the same buffer
would never be updated (so long as they remained unselected)?  Even if,
say, an insertion had changed all the line numbers visible in another
window?

Davis

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