vim/plugin/autocmds.vim
augroup focus
autocmd!
autocmd BufEnter,FocusGained,VimEnter,WinEnter * setlocal colorcolumn=+1,+2
autocmd FocusLost,WinLeave * setlocal colorcolumn=0
autocmd BufEnter,FocusGained,VimEnter,WinEnter * setlocal cursorline
autocmd FocusLost,WinLeave * setlocal nocursorline
autocmd BufEnter,FocusGained,VimEnter,WinEnter * call autocmds#focus_statusline()
autocmd FocusLost,WinLeave * call autocmds#blur_statusline()
augroup END