How to capture export prepended header numbering

How to capture export prepended header numbering

[Lawrence Bottorff]

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Basically, I'd like to know what level each heading of an org file is and
in what order they appear. So if my org file looks like this

* heading a
** sub-heading a.1
** sub-heading a.2
*** sub-sub-heading a.2.1
* heading b
** sub-heading b.1
*** sub-sub-heading b.1.1
* heading c

And an HTML export creates this

1 heading a
1.1 sub-heading a.1
1.2 sub-heading a.2
1.2.1 sub-sub-heading a.2.1
2 heading b
2.1 sub-heading b.1
2.1.1 sub-sub-heading b.1.1
3 heading c

is there a way to capture that prepended export numbering? Actually, I'd
like to capture every heading's rank and order and keep it in a PROPERTIES
drawer. There's obviously some baked in mechanism doing this for exporting.
Is it possible for a mere mortal to know, have?

LB

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Re: How to capture export prepended header numbering

[Adam Porter]

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There is no built-in way to do that, and no way independent of
org-export to get the numbers, AFAIK.

Here's some ugly old code that shows outline numbering as overlays in an
Org buffer.  It doesn't update automatically, so you have to run it
again when the outline changes.  But it seems to work well.  It uses
dash.el and let-alist, in case you don't have them loaded.

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Re: How to capture export prepended header numbering

[Adam Porter]

FYI, I tidied the code a tiny bit and posted it here:

https://github.com/alphapapa/unpackaged.el#outline-number-overlays

Re: How to capture export prepended header numbering

[Adam Porter]

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Adam Porter <adam@alphapapa.net> writes:

> There is no built-in way to do that, and no way independent of
> org-export to get the numbers, AFAIK.
>
> Here's some ugly old code that shows outline numbering as overlays in an
> Org buffer.  It doesn't update automatically, so you have to run it
> again when the outline changes.  But it seems to work well.  It uses
> dash.el and let-alist, in case you don't have them loaded.

Please do disregard that monstrosity.  I rewrote it in a much simpler
way.  It seems fast on a reasonably large Org buffer.  It doesn't
account for org-indent-mode or org-bullets, but that wouldn't be too
hard to fix, I think.

No third-party packages are required.  See attached file, or
<https://github.com/alphapapa/unpackaged.el#outline-number-overlays>.


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Re: How to capture export prepended header numbering

[Adam Porter]

Someone reminded me that Org has org-num-mode now, so please disregard
all of that.  At least it was good exercise.