Hydras for vim: proof of concept

hydra.vim

" Based on abo-abo/hydra (an Emacs plugin): hydras for vim.
" maparg can be used to read, store and restore pre-existing mappings.
" also important is having just one place to define hydras
" the rest should be automatically generated

function! Hydra_Move_Enable()
  call Hydra_OpenCheatsheet("move") 
  nmap <buffer> s :m .+1<CR>==
  nmap <buffer> w :m .-2<CR>==
  nmap <buffer> q :call Hydra_Move_Disable()<CR>
endfunction

nmap <silent> <leader>m :call Hydra_Move_Enable()<CR>

function! Hydra_Move_Disable()
  nunmap <buffer> s
  nunmap <buffer> w
  nunmap <buffer> q
  bufdo call Hydra_CloseCheatsheets()
endfunction

function! Hydra_OpenCheatsheet(filename)
  exe "bo split ~/.vim/hydra/cheatsheets/" . a:filename
  setlocal laststatus=0
  exe "resize " . line('$')
  set nonumber
  setlocal filetype=hydracheatsheet
  setlocal nomodifiable
  wincmd p
endfunction
 
function! Hydra_CloseCheatsheets()
  if &ft == "hydracheatsheet"
    bd!
  endif
endfunction

move

[w] move line up
[s] move line down
[q] quit

q should close the cheat sheets that are visible.

If you want hydra for vim, you're going to have to pick up Vimscript.

• https://learnvimscriptthehardway.stevelosh.com/
• :h usr_toc

I know just enough Vimscript to figure there's no reason why this script should close multiple windows. Unfortunately it does on Neovim 0.4.3, so I reached out. Abandoning this in favor of other solutions for the moment.

I changed bufdo call Hydra_CloseCheatsheets() to windo call Hydra_CloseCheatsheets().

Seems to work fine.

It won't close other windows/tabs.