How to make arrow bindings work in the c mode?

[nagisa]

Hi,

I have been trying to make <Down> and <Up> arrows work for autocompletions in the command mode.

Here's what my current setup looks like:

local cmp = require('cmp')
cmp.setup {
  sources = cmp.config.sources {
    { name = 'nvim_lsp' },
  },
  view = {
    entries = "custom"
  },
  experimental = {
    ghost_text = true,
  },
  snippet = {
    expand = function(args)
    end,
  },
  mapping = {
    -- Confirm selections with tab
    ['<Tab>'] = cmp.mapping(function(fallback)
      if cmp.visible()
      then cmp.confirm({ select = true })
      else fallback()
      end
    end, {'i', 'c'}),
    ['<C-e>'] = cmp.mapping({
      i = cmp.mapping.abort(),
      c = cmp.mapping.close(),
    }),
    ['<Down>'] = cmp.mapping(cmp.mapping.select_next_item({
      behavior = cmp.SelectBehavior.Select
    }), {'i', 'c'}),
    ['<Up>'] = cmp.mapping(cmp.mapping.select_prev_item({
      behavior = cmp.SelectBehavior.Select
    }), {'i', 'c'}),
  }
}

And while I am able to use the arrows to move between autocompletion items in the insert mode (i.e. when writing code), the autocompletion dialog closes immediately when I'm in the c mode (i.e. autocompleting a : command.) The default <C-n> and <C-p> bindings work just fine.

Does anybody have a clue as to what might be happening here? This is the output of cmap showing the c mode bindings:

c  <S-Tab>     * <Cmd>call v:lua.cmp.utils.keymap.set_map(10)<CR>
c  <Down>      * <Cmd>call v:lua.cmp.utils.keymap.set_map(9)<CR>
c  <Up>        * <Cmd>call v:lua.cmp.utils.keymap.set_map(5)<CR>
c  <Plug>(TelescopeFuzzyCommandSearch) * <C-\>e "lua require('telescope.builtin').command_history { defaul
t_text = [=[" . escape(getcmdline(), '"') . "]=] }"<CR><CR>
c  <C-E>       * <Cmd>call v:lua.cmp.utils.keymap.set_map(7)<CR>
c  <Tab>       * <Cmd>call v:lua.cmp.utils.keymap.set_map(3)<CR>
c  <C-N>       * <Cmd>call v:lua.cmp.utils.keymap.set_map(12)<CR>
c  <C-P>       * <Cmd>call v:lua.cmp.utils.keymap.set_map(14)<CR>

[sonnybox]

Did you figure it out in the last two years lol? If you haven't, here is the solution:

cmp.setup.cmdline({ '/', '?' }, {
	mapping = cmp.mapping.preset.cmdline({
		["<Down>"] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_next_item()
				-- You could replace the expand_or_jumpable() calls with expand_or_locally_jumpable()
				-- that way you will only jump inside the snippet region
			elseif luasnip.expand_or_jumpable() then
				luasnip.expand_or_jump()
			elseif has_words_before() then
				cmp.complete()
			else
				fallback()
			end
		end, { 'c' }),
		["<Up>"] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_prev_item()
			elseif luasnip.jumpable(-1) then
				luasnip.jump(-1)
			else
				fallback()
			end
		end, { 'c' }),

	}),
	sources = {
		{ name = 'buffer' }
	}
})

cmp.setup.cmdline(':', {
	mapping = cmp.mapping.preset.cmdline({
		["<Down>"] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_next_item()
				-- You could replace the expand_or_jumpable() calls with expand_or_locally_jumpable()
				-- that way you will only jump inside the snippet region
			elseif luasnip.expand_or_jumpable() then
				luasnip.expand_or_jump()
			elseif has_words_before() then
				cmp.complete()
			else
				fallback()
			end
		end, { 'c' }),
		["<Up>"] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_prev_item()
			elseif luasnip.jumpable(-1) then
				luasnip.jump(-1)
			else
				fallback()
			end
		end, { 'c' }),

	}),
	sources = cmp.config.sources({
		{ name = 'path' }
	}, {
		{ name = 'cmdline' }
	}),
	matching = { disallow_symbol_nonprefix_matching = false }
})