Neovim/lua/plugins/cmp.lua

return {
    {
        'hrsh7th/nvim-cmp',
        dependencies = {
            -- extra completion plugins
            'hrsh7th/cmp-cmdline',
            'hrsh7th/cmp-path',
            'hrsh7th/cmp-buffer',
            'hrsh7th/cmp-nvim-lsp',
            'hrsh7th/cmp-calc',
            'hrsh7th/cmp-emoji',
            'kdheepak/cmp-latex-symbols',
            -- snippets
            'hrsh7th/cmp-vsnip',
            'hrsh7th/vim-vsnip',
            'onsails/lspkind.nvim'
        },
        config = function(_, _)
            local cmp = require("cmp");
            cmp.setup({
                window = {
                    completion = {
                        border = "single",
                        scrollbar = false,
                        winhighlight = "Normal:CmpPmenu,FloatBorder:FloatBorder,Search:None"
                    },
                    documentation = {
                        border = "single",
                        scrollbar = false,
                        winhighlight = "Normal:CmpPmenu,FloatBorder:FloatBorder,Search:None"
                    },
                },
                snippet = {
                    expand = function(args)
                        vim.fn["vsnip#anonymous"](args.body)
                    end,
                },
                completion = {
                    preselect = 'none',
                    completeopt = "menu,menuone,noinser,noselectt",
                },
                sources = cmp.config.sources({
                    { name = 'nvim_lsp' },
                    { name = 'nvim_lsp_signature_help' },
                    { name = 'vsnip' },
                    { name = 'buffer' },
                    { name = "path" },
                    { name = 'calc' },
                }, {
                    { name = 'emoji' },
                    { name = "cmdline" },
                    { name = "latex_symbols" }
                }),
                mapping = cmp.mapping.preset.insert({
                    ['<C-b>'] = cmp.mapping.scroll_docs(-4),
                    ['<C-f>'] = cmp.mapping.scroll_docs(4),
                    ['<C-Space>'] = cmp.mapping.complete(),
                    ['<C-e>'] = cmp.mapping.abort(),
                    ["<CR>"] = cmp.mapping({
       i = function(fallback)
         if cmp.visible() and cmp.get_active_entry() then
           cmp.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = false })
         else
           fallback()
         end
       end,
       s = cmp.mapping.confirm({ select = true }),
       c = cmp.mapping.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = true }),
     }),
                }),
                formatting = {
                    fields = { "abbr", "kind", "menu" },
                    format = function(entry, item)
                         return require("lspkind").cmp_format()(entry, item)
                    end
                },
                experimental = {
        ghost_text = {
          hl_group = "NonText",
        },
      },
            })
        end
    }
}