di...@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>
