nvim/lua/plugins/configs/cmp.lua

local cmp = require("cmp")
-- require("ui").load_highlight "cmp"


local function border(hl_name)
    return {
        { "╭", hl_name },
        { "─", hl_name },
        { "╮", hl_name },
        { "│", hl_name },
        { "╯", hl_name },
        { "─", hl_name },
        { "╰", hl_name },
        { "│", hl_name },
    }
end

local options = {
    completion = {
        completeopt = "menu,menuone",
    },
    window = {
        completion = {
            border = border "CmpBorder",
            winhighlight = "Normal:CmpPmenu,CursorLine:PmenuSel,Search:None",
            scrollbar = false,
        },
        documentation = {
            border = border "CmpDocBorder",
        },
    },
    snippet = {
        expand = function(args)
            require("luasnip").lsp_expand(args.body)
        end,
    },

    formatting = {
        format = function(_, vim_item)
            local icons = {
                Namespace = "󰌗",
                Text = "󰉿",
                Method = "󰆧",
                Function = "󰆧",
                Constructor = "",
                Field = "󰜢",
                Variable = "󰀫",
                Class = "󰠱",
                Interface = "",
                Module = "",
                Property = "󰜢",
                Unit = "󰑭",
                Value = "󰎠",
                Enum = "",
                Keyword = "󰌋",
                Snippet = "",
                Color = "󰏘",
                File = "󰈚",
                Reference = "󰈇",
                Folder = "󰉋",
                EnumMember = "",
                Constant = "󰏿",
                Struct = "󰙅",
                Event = "",
                Operator = "󰆕",
                TypeParameter = "󰊄",
                Table = "",
                Object = "󰅩",
                Tag = "",
                Array = "[]",
                Boolean = "",
                Number = "",
                Null = "󰟢",
                String = "󰉿",
                Calendar = "",
                Watch = "󰥔",
                Package = "",
                Copilot = "",
            }
            vim_item.kind = string.format("%s %s", icons[vim_item.kind], vim_item.kind)
            return vim_item
        end,
    },

    mapping = {
        ["<C-p>"] = cmp.mapping.select_prev_item(),
        ["<C-n>"] = cmp.mapping.select_next_item(),
        ["<C-d>"] = cmp.mapping.scroll_docs(-4),
        ["<C-f>"] = cmp.mapping.scroll_docs(4),
        ["<C-Space>"] = cmp.mapping.complete(),
        ["<C-e>"] = cmp.mapping.close(),
        ["<CR>"] = cmp.mapping.confirm {
            behavior = cmp.ConfirmBehavior.Replace,
            select = false,
        },
        ["<Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_next_item()
            elseif require("luasnip").expand_or_jumpable() then
                vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<Plug>luasnip-expand-or-jump", true, true, true), "")
            else
                fallback()
            end
        end, {
            "i",
            "s",
        }),
        ["<S-Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_prev_item()
            elseif require("luasnip").jumpable(-1) then
                vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<Plug>luasnip-jump-prev", true, true, true), "")
            else
                fallback()
            end
        end, {
            "i",
            "s",
        }),
    },
    sources = {
        { name = "nvim_lsp" },
        { name = "luasnip" },
        { name = "buffer" },
        { name = "nvim_lua" },
        { name = "path" },
        { name = "crates" },
    },
}

cmp.setup(options)