Hide tabline when there is less than 1 tab

[Gael-Lopes-Da-Silva]

Contributing guidelines

• I have read CODE_OF_CONDUCT.md

Module(s)

mini.tabline

Question

Is there a way to hide the tabline when there is no tab open ?

I tried to do an auto command but it didn't work:

    vim.api.nvim_create_autocmd({ "TabNew", "TabClosed" }, {
        desc = "Hide the tabline when empty",
        group = group,
        callback = function()
            local show = #vim.api.nvim_list_tabpages() > 1
            vim.opt.showtabline = show and 2 or 0
        end,
    })

#vim.api.nvim_list_tabpages() > 1 seems to always return 1.

[echasnovski]

'mini.tabline' shows listed buffers instead of tab (a.k.a. tabpages, see :h window).
I'd it is rare to have only a single listed buffer opened when working with Neovim, but it can be done with something like this:

local get_n_listed_bufs = function()
  local n = 0
  for _, buf_id in ipairs(vim.api.nvim_list_bufs()) do
    n = n + (vim.bo[buf_id].buflisted and 1 or 0)
  end
  return n
end

vim.api.nvim_create_autocmd({ 'BufAdd', 'BufDelete' }, {
  desc = 'Hide the tabline when empty',
  group = group,
  -- Schedule because 'BufDelete' is triggered when buffer is still present
  callback = vim.schedule_wrap(function() vim.o.showtabline = get_n_listed_bufs() > 1 and 2 or 0 end),
})