nvim/lua/plugins/tabline.lua

return {
  'nvim-lualine/lualine.nvim',
  dependencies = {
    { 'kyazdani42/nvim-web-devicons', lazy = true },
    'nvim-lua/lsp-status.nvim',
    'crater2150/vim-theme-chroma',
  },
  event = "VeryLazy",
  opts = function(_, opts) return {
    options = {
      theme = require('chroma-theme.lualine')
    },
    tabline = {
      lualine_a = { 'branch' },
      lualine_b = {},
      lualine_c = { { 'buffers', show_filename_only = false, symbols = { modified = " ✏️]", alternate_file = " 🔃", folder = " 📁"} ,}},
      lualine_x = {},
      lualine_y = {},
      lualine_z = {
        {'tabs',
          mode=1,
          fmt = function(name, context)
            local buflist = vim.fn.tabpagebuflist(context.tabnr)
            local mod = not vim.tbl_isempty(vim.tbl_filter(
              function(bufnr) return vim.fn.getbufvar(bufnr, '&mod') == 1 end,
              buflist))

            local wincount = #vim.tbl_filter(
              function(i) return i == 'leaf' end,
              vim.tbl_flatten(vim.fn.winlayout(context.tabnr))
            )

            return name .. (wincount > 1 and ' +' .. (wincount - 1) or '') .. (mod and ' [✏️]]' or '')
          end
      } }
    },
    sections = {
      lualine_a = { 'filename' },
      lualine_b = { 'diff', 'diagnostics' },
      lualine_x = { "require'lsp-status'.status()" },
      lualine_y = { 'filetype' },
      lualine_z = { 'searchcount', 'selectioncount', 'location' }
    },
    inactive_sections = {
      lualine_a = {},
      lualine_b = {},
      lualine_c = { 'filename' },
      lualine_x = { 'location' },
      lualine_y = {},
      lualine_z = {}
    },
    winbar = {},
    inactive_winbar = {},
    extensions = {}
  }
  end,
}