How to trigger autocomplete suggestion box in vim or neovim (Plugin neoclide/coc.vim)

Question

I'm Neovim user

and I use Plugin neoclide/coc.vim for autocompletion

but when my cursor focus out, I can not get suggestion box again
(How can I call this box? suggest box or hint box? I want to know this box name)

I want to trigger it and see again, Is there any command or variable for this?

Solution 1

I've commented in https://github.com/neoclide/coc.nvim/issues/2299#issuecomment-686293001

The suggestion box in your image is signatureHelp. If you want to reopen it, you need to trigger triggerCharacters in your function, usually is ( and ,. The triggerCharacters is defined by LS.

Solution 2

Yes, the answer is on the front page of CoC's github project. You need to map something to coc#refresh(). For instance, to use Ctrl + Space to trigger completion, you need to put the following in your vimrc:

inoremap <silent><expr> <c-space> coc#refresh()

There are more examples on the project's page.

Solution 3

TLDR: try this Ctrl+@

I found this in README of neoclide/coc.nvim:

" Use <c-space> to trigger completion.
if has('nvim')
  inoremap <silent><expr> <c-space> coc#refresh()
else
  inoremap <silent><expr> <c-@> coc#refresh()
endif

The weirdness here is that, Ctrl+Space is not working, despite using neovim NOT vim.

But there is a good trick to get your desired key binding as it appears from your terminal emulator point of view:

1. Enter insert mode
2. Press Ctrl+v
3. Then press your keys you want to bind, Ctrl+Space

It seems that my terminal doesn't recognize using Ctrl and Space. "I think this is the real problem!"

---

Edit

Steps to solve it:

1. I changed the default coc config a little bit:

   inoremap <silent><expr> <c-space> coc#refresh()
   inoremap <silent><expr> <c-@> coc#refresh()
   

2. I tried bash as I was using zsh as a shell, but the problem is still there.
3. Then I tried another terminal emulator and the problem is solved, alhamdulilah.