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I'd like to make a plugin to display currently pending keys while in operator-pending mode. As the first part of that, how would I register an autocmd to run when operator-pending mode is entered? I'm using neovim, so I'm totally cool if it only works there.

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  • 4
    Have you seen what :set showcmd displays? What do you intend to show in addition to that?
    – jamessan
    Commented Oct 19, 2016 at 20:17
  • Huh! of course it already exists. I've been getting so addicted to vimscript that I didn't think to check. I do want to go further, though - I'd like to preview changes that will be caused by repeating commands, so it'd still be cool to know if there's a way to get that event.
    – lahwran
    Commented Oct 19, 2016 at 20:55
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    :h autocmd-events gives you all of the available autocommand events, and I don't think there is one for entering operator pending mode. But maybe you could do something with some operator pending mode mappings: :h omap-info
    – statox
    Commented Oct 20, 2016 at 7:52
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    there is no such event.
    – Christian Brabandt
    Commented Oct 20, 2016 at 10:03
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    Now there is! (as at 8.2.3430, (sep 12 2022)) au ModeChanged *:no* {cmd}
    – husB
    Commented Jan 8, 2023 at 15:20

2 Answers 2

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Well, you could always poll Vim:

let s:m = ''

function! MyHandler(timer)
  let m = mode(1)
  if m != s:m
    if m == 'no'
      echo "operator pending"
    else
      echo "-"
    endif
    let s:m = m
  endif
endfunction

Start with:

:call timer_start(250, 'MyHandler', {'repeat': -1})
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Not sure if still useful. But for future Google searches...

See h: ModeChanged

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    Definitely useful, but some some details (say, an example), would make it even better!
    – husB
    Commented Jan 8, 2023 at 15:22

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