add completion

init.lua

@@ -2,3 +2,4 @@ require "user.options"
 require "user.keymaps"
 require "user.plugins"
 require "user.colorscheme"
+require "user.cmp"

lua/user/cmp.lua

@@ -0,0 +1,129 @@
+local cmp_status_ok, cmp = pcall(require, "cmp")
+if not cmp_status_ok then
+  return
+end
+
+local snip_status_ok, luasnip = pcall(require, "luasnip")
+if not snip_status_ok then
+  return
+end
+
+require("luasnip/loaders/from_vscode").lazy_load()
+
+local check_backspace = function()
+  local col = vim.fn.col "." - 1
+  return col == 0 or vim.fn.getline("."):sub(col, col):match "%s"
+end
+
+--   פּ ﯟ   some other good icons
+local kind_icons = {
+  Text = "",
+  Method = "m",
+  Function = "",
+  Constructor = "",
+  Field = "",
+  Variable = "",
+  Class = "",
+  Interface = "",
+  Module = "",
+  Property = "",
+  Unit = "",
+  Value = "",
+  Enum = "",
+  Keyword = "",
+  Snippet = "",
+  Color = "",
+  File = "",
+  Reference = "",
+  Folder = "",
+  EnumMember = "",
+  Constant = "",
+  Struct = "",
+  Event = "",
+  Operator = "",
+  TypeParameter = "",
+}
+-- find more here: https://www.nerdfonts.com/cheat-sheet
+
+cmp.setup {
+  snippet = {
+    expand = function(args)
+      luasnip.lsp_expand(args.body) -- For `luasnip` users.
+    end,
+  },
+  mapping = {
+    ["<C-k>"] = cmp.mapping.select_prev_item(),
+		["<C-j>"] = cmp.mapping.select_next_item(),
+    ["<C-b>"] = cmp.mapping(cmp.mapping.scroll_docs(-1), { "i", "c" }),
+    ["<C-f>"] = cmp.mapping(cmp.mapping.scroll_docs(1), { "i", "c" }),
+    ["<C-Space>"] = cmp.mapping(cmp.mapping.complete(), { "i", "c" }),
+    ["<C-y>"] = cmp.config.disable, -- Specify `cmp.config.disable` if you want to remove the default `<C-y>` mapping.
+    ["<C-e>"] = cmp.mapping {
+      i = cmp.mapping.abort(),
+      c = cmp.mapping.close(),
+    },
+    -- Accept currently selected item. If none selected, `select` first item.
+    -- Set `select` to `false` to only confirm explicitly selected items.
+    ["<CR>"] = cmp.mapping.confirm { select = true },
+    ["<Tab>"] = cmp.mapping(function(fallback)
+      if cmp.visible() then
+        cmp.select_next_item()
+      elseif luasnip.expandable() then
+        luasnip.expand()
+      elseif luasnip.expand_or_jumpable() then
+        luasnip.expand_or_jump()
+      elseif check_backspace() then
+        fallback()
+      else
+        fallback()
+      end
+    end, {
+      "i",
+      "s",
+    }),
+    ["<S-Tab>"] = cmp.mapping(function(fallback)
+      if cmp.visible() then
+        cmp.select_prev_item()
+      elseif luasnip.jumpable(-1) then
+        luasnip.jump(-1)
+      else
+        fallback()
+      end
+    end, {
+      "i",
+      "s",
+    }),
+  },
+  formatting = {
+    fields = { "kind", "abbr", "menu" },
+    format = function(entry, vim_item)
+      -- Kind icons
+      vim_item.kind = string.format("%s", kind_icons[vim_item.kind])
+      -- vim_item.kind = string.format('%s %s', kind_icons[vim_item.kind], vim_item.kind) -- This concatonates the icons with the name of the item kind
+      vim_item.menu = ({
+        nvim_lsp = "[LSP]",
+        luasnip = "[Snippet]",
+        buffer = "[Buffer]",
+        path = "[Path]",
+      })[entry.source.name]
+      return vim_item
+    end,
+  },
+  sources = {
+    { name = "nvim_lsp" },
+    { name = "luasnip" },
+    { name = "buffer" },
+    { name = "path" },
+  },
+  confirm_opts = {
+    behavior = cmp.ConfirmBehavior.Replace,
+    select = false,
+  },
+  documentation = {
+    border = { "╭", "─", "╮", "│", "╯", "─", "╰", "│" },
+  },
+  experimental = {
+    ghost_text = false,
+    native_menu = false,
+  },
+}

lua/user/plugins.lua

@@ -47,7 +47,18 @@ return packer.startup(function(use)
 
   -- Colorschemes
   -- use "lunarvim/colorschemes" -- A bunch of colorschemes you can try out
-  use "lunarvim/darkplus.nvim" -- A bunch of colorschemes you can try out
+  use "lunarvim/darkplus.nvim"
+
+  -- cmp plugins
+  use "hrsh7th/nvim-cmp" -- The completion plugin
+  use "hrsh7th/cmp-buffer" -- buffer completions
+  use "hrsh7th/cmp-path" -- path completions
+  use "hrsh7th/cmp-cmdline" -- cmdline completions
+  use "saadparwaiz1/cmp_luasnip" -- snippet completions
+
+  -- snippets
+  use "L3MON4D3/LuaSnip" --snippet engine
+  use "rafamadriz/friendly-snippets" -- a bunch of snippets to use
 
   -- Automatically set up your configuration after cloning packer.nvim
   -- Put this at the end after all plugins