Vim Automatic List Continuation

_vim_auto_list.markdown

Vim Auto List Completion

This snippet makes Vim automatically continue/end lists in insert mode, similar to the way word processors do:

• It automatically adds the bullet/number for the next list item when you press Return at the end of an existing item,
• When you press Return on an empty list item, it removes the bullet/number, ending the list.

It supports ordered lists with markers like 1. and unordered lists with - markers (because those are the markers I use.)

(It's particularly useful when using an iOS keyboard where punctuation and numerals are slow to access.)

Installation

If you're not sure how to install, just drop the markdown.vim file itself in ~/vim/after/, or if that file already exists, copy the code into it.

N.B.

1. I just use this for Markdown, but the code itself doesn't care about the filetype. It should be fairly easy to adjust it for different list styles. Making it a robust, multi-format extension would be a bit more work.
2. It supports lists with markers like - and 1., because those are the list markers I use, but it would be easy to make it support more types of bullet/numbering.
3. I've just got it enabled for when I hit Return, but it'd be fairly easy to also enable it for normal mode o and O.

Let me know if you want to tweak it but don't know how to.

markdown.vim

" Auto lists: Automatically continue/end lists by adding markers if the
" previous line is a list item, or removing them when they are empty
function! s:auto_list()
  let l:preceding_line = getline(line(".") - 1)
  if l:preceding_line =~ '\v^\d+\.\s.'
    " The previous line matches any number of digits followed by a full-stop
    " followed by one character of whitespace followed by one more character
    " i.e. it is an ordered list item

    " Continue the list
    let l:list_index = matchstr(l:preceding_line, '\v^\d*')
    call setline(".", l:list_index + 1. ". ")
  elseif l:preceding_line =~ '\v^\d+\.\s$'
    " The previous line matches any number of digits followed by a full-stop
    " followed by one character of whitespace followed by nothing
    " i.e. it is an empty ordered list item

    " End the list and clear the empty item
    call setline(line(".") - 1, "")
  elseif l:preceding_line[0] == "-" && l:preceding_line[1] == " "
    " The previous line is an unordered list item
    if strlen(l:preceding_line) == 2
      " ...which is empty: end the list and clear the empty item
      call setline(line(".") - 1, "")
    else
      " ...which is not empty: continue the list
      call setline(".", "- ")
    endif
  endif
endfunction

" N.B. Currently only enabled for return key in insert mode, not for normal
" mode 'o' or 'O'
inoremap <buffer> <CR> <CR><Esc>:call <SID>auto_list()<CR>A

I found this really useful but wanted the same functionality for indented lists so I've added that for myself. I'm not sure what the best way is to share my changes to a gist, but if someone could let me know I'd be happy to make them public.

I'm not sure what the best way is to share my changes to a gist, but if someone could let me know I'd be happy to make them public.

I'm also not sure if there's a better way, but mostly people seem to just publish their own gist and paste a link into a comment on the original.

I've published my changes in a new gist.