Is it possible to jump to the next closed fold in Vim?
Let me propose the following implementation of the described behavior.
nnoremap <silent> <leader>zj :call NextClosedFold('j')<cr>
nnoremap <silent> <leader>zk :call NextClosedFold('k')<cr>
function! NextClosedFold(dir)
let cmd = 'norm!z' . a:dir
let view = winsaveview()
let [l0, l, open] = [0, view.lnum, 1]
while l != l0 && open
exe cmd
let [l0, l] = [l, line('.')]
let open = foldclosed(l) < 0
endwhile
if open
call winrestview(view)
endif
endfunction
If it is desirable for the mappings to accept a count for the number of repetitions of the corresponding movement, one can implement a simple function for repeating any given command:
function! RepeatCmd(cmd) range abort
let n = v:count < 1 ? 1 : v:count
while n > 0
exe a:cmd
let n -= 1
endwhile
endfunction
and then redefine the above mappings as follows:
nnoremap <silent> <leader>zj :<c-u>call RepeatCmd('call NextClosedFold("j")')<cr>
nnoremap <silent> <leader>zk :<c-u>call RepeatCmd('call NextClosedFold("k")')<cr>
No, there isn't, as far as I know, a build-in method to do that. Interesting idea, though.
If I had some time at the moment, I might try to figure out a way to do it — unfortunately, being busy nowadays, all I can suggest you is to look at the Detecting a folded line or an incremental search question (particularly the foldclosed
function) and try to make a function yourself. Checking every line, if fold is open, skip… something along those lines.