How to implement Super Tab like behavior?

[BerkeleyTrue]

issue description

If I enable auto_trigger for suggestions, and have my accept keymap set to , when there are no suggestions, tab key does nothing.

expected behavior

I'd expect the tab key to feed tab to the editor when there are no suggestion.

[MunifTanjim]

For super tab like mapping, disable the built-in mapping:

require("copilot").setup({
  suggestion = {
    accept = false,
  },
})

and define the mapping yourself:

vim.keymap.set("i", '<Tab>', function()
  if require("copilot.suggestion").is_visible() then
    require("copilot.suggestion").accept()
  else
    vim.api.nvim_feedkeys(vim.api.nvim_replace_termcodes("<Tab>", true, false, true), "n", false)
  end
end, {
  silent = true,
})

or if you're using nvim-cmp, you can do something like this:

cmp.setup({
  -- ...
  mapping = {
    -- ...
    ["<Tab>"] = cmp.mapping(function(fallback)
      if require("copilot.suggestion").is_visible() then
        require("copilot.suggestion").accept()
      elseif cmp.visible() then
        cmp.select_next_item({ behavior = cmp.SelectBehavior.Insert })
      elseif luasnip.expandable() then
        luasnip.expand()
      elseif has_words_before() then
        cmp.complete()
      else
        fallback()
      end
    end, {
      "i",
      "s",
    }),
    -- ...
  },
  -- ...
})

[BerkeleyTrue]

@MunifTanjim That worked for me.

Should I close this issue?

[MunifTanjim]

Yep. That is the recommended way of setting up custom keymap behavior.