vim remap fold navigation using leader key

Question

I picked up this handy function for skipping up and down closed folds in vim:

let mapleader = ","
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

As you can see, my leader key is set to , .

So now if I issue the command ,zj my cursor is moved to the next closed fold. However, what I want is to have the zj command defaulted to moving to the next closed fold, and I want ,zj to move to the next fold (open or closed).

What is the most elegant way to write the remapping so my vim behaves the way I want it to?

Answer 1

It sounds like you want this.

nnoremap <silent> <leader>zj zj
nnoremap <silent> <leader>zk zk
nnoremap <silent> zj :call NextClosedFold('j')<cr>
nnoremap <silent> 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

nnoremap makes mapping non recursive so even if you redefine what zj and zk do you can always get back their default behavior. Then we just map zj and zk to the behavior you want.