Add window numbers to Vim

No shot I can write vim lisp on my own, but this is relatively straightforward. When using vim with a lot of tabs and windows, I want to know which window number I’m on. Vim has 2 built in convenience functions: win_getid, win_id2win.

We can then write a function that just returns a string with the window number. This function can be called by our vim-airline plugin.

Add this to your .vimrc

" Function to get window number
function! WindowNumber()
  return '(' . win_id2win(win_getid()) . ')'
endfunction
 
" Customize vim-airline section c
let g:airline_section_c = airline#section#create_left([
      \ '%f',
      \ '%{WindowNumber()}'
      \ ])