[FEATURE] On line-numbers inside Org Babel Source Blocks.

[FEATURE] On line-numbers inside Org Babel Source Blocks.

[divya]

Hello, Org Mode!

I've been using Org Mode for literate programming purposes, and would like to have line-numbers within `src` blocks. I am able to export the Org buffer and get the line-numbers, but I am unable to do the same with regards to just in Org buffers. I am aware of `org-edit-special`, but I would rather appreciate if I can just look at a piece of code and know how long it is. I believe a header argument can be useful in toggling this.

Since the source blocks can already implement syntax highlighting, font and other means of interacting with displaying Babel source blocks, theoretically this shouldn't be that difficult to implement? I'd be glad to help implementing this feature, if I can be slightly guided on where to refer to look for in the codebase.

Regards,

Divya Ranjan

Re: [FEATURE] On line-numbers inside Org Babel Source Blocks.

[Divya]

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On 7 August 2024 13:59:16 GMT, divya@subvertising.org wrote:
>Hello, Org Mode!
>
>I've been using Org Mode for literate programming purposes, and would like to have line-numbers within `src` blocks. I am able to export the Org buffer and get the line-numbers, but I am unable to do the same with regards to just in Org buffers. I am aware of `org-edit-special`, but I would rather appreciate if I can just look at a piece of code and know how long it is. I believe a header argument can be useful in toggling this.
>
>Since the source blocks can already implement syntax highlighting, font and other means of interacting with displaying Babel source blocks, theoretically this shouldn't be that difficult to implement? I'd be glad to help implementing this feature, if I can be slightly guided on where to refer to look for in the codebase.
>
>Regards,
>
>Divya Ranjan
>

Any suggestions, Ihor?

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Re: [FEATURE] On line-numbers inside Org Babel Source Blocks.

[Ihor Radchenko]

divya@subvertising.org writes:

> I've been using Org Mode for literate programming purposes, and would
> like to have line-numbers within `src` blocks. I am able to export the
> Org buffer and get the line-numbers, but I am unable to do the same
> with regards to just in Org buffers. I am aware of `org-edit-special`,
> but I would rather appreciate if I can just look at a piece of code
> and know how long it is. I believe a header argument can be useful in
> toggling this.

I agree that it would be nice to have line numbering in code blocks.

> Since the source blocks can already implement syntax highlighting,
> font and other means of interacting with displaying Babel source
> blocks, theoretically this shouldn't be that difficult to implement?
> I'd be glad to help implementing this feature, if I can be slightly
> guided on where to refer to look for in the codebase.

AFAIK, it is not very easy. Syntax highlighting is just a matter of
applying the right text properties, but not line numbers.

Native line numbering in Emacs is implemented on low level, and is not
very exposed to Elisp. There is a limited set of options available for
customization - all in `display-line-numbers' variable. See "16.24
Customization of Display" section in Emacs manual.

I do not know anything built-in that can help in our situation, with
line numbers to be applied selectively.

We may try the approach taken by the old linum-mode, except that linum
is infamous for its poor performance. So, it might be better to hack on
https://git.savannah.gnu.org/cgit/emacs/elpa.git/tree/nlinum.el?h=externals/nlinum
as suggested in lisp/obsolete/linum.el commentary.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>

Re: [FEATURE] On line-numbers inside Org Babel Source Blocks.

[Phil Estival]

 > I've been using Org Mode for literate programming purposes, and
 > would like to have line-numbers within `src` blocks. [...]
 > I'd be glad to help implementing this feature, if I can be slightly
 > guided on where to refer to look for in the codebase.

https://kitchingroup.cheme.cmu.edu/blog/2015/10/13/Line-numbers-in-org-mode-code-blocks/