clean up autocompletion

.config/nvim/lua/plugins/config/cmp.lua

@@ -3,22 +3,15 @@ if not cmp_status_ok then
   return
 end
 
-local function border(hl_name)
-  return {
-    { "╭", hl_name },
-    { "─", hl_name },
-    { "╮", hl_name },
-    { "│", hl_name },
-    { "╯", hl_name },
-    { "─", hl_name },
-    { "╰", hl_name },
-    { "│", hl_name },
-  }
+local luasnip_status_ok, luasnip = pcall(require, 'luasnip')
+if not luasnip_status_ok then
+  return
 end
 
-local check_backspace = function()
-  local col = vim.fn.col(".") - 1
-  return col == 0 or vim.fn.getline("."):sub(col, col):match("%s")
+local has_words_before = function()
+  unpack = unpack or table.unpack
+  local line, col = unpack(vim.api.nvim_win_get_cursor(0))
+  return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil
 end
 
 local cmp_window = require "cmp.utils.window"
@@ -33,23 +26,25 @@ end
 cmp.setup({
   window = {
     completion = {
-      border = border "CmpBorder",
-      winhighlight = "Normal:CmpPmenu,CursorLine:PmenuSel,Search:None",
-    },
-    documentation = {
-      border = border "CmpDocBorder",
+      winhighlight = "Normal:Pmenu,FloatBorder:Pmenu,Search:None",
+      col_offset = -3,
+      side_padding = 0,
     },
   },
+  formatting = {
+    fields = { "kind", "abbr", "menu" },
+    format = function(entry, vim_item)
+      local kind = require("lspkind").cmp_format({ mode = "symbol_text", maxwidth = 50 })(entry, vim_item)
+      local strings = vim.split(kind.kind, "%s", { trimempty = true })
+      kind.kind = " " .. (strings[1] or "") .. " "
+      kind.menu = "    (" .. (strings[2] or "") .. ")"
+
+      return kind
+    end,
+  },
   snippet = {
     expand = function(args)
-      require("luasnip").lsp_expand(args.body)
-    end,
-  },
-  formatting = {
-    format = function(_, vim_item)
-      local icons = require('config.iconlist').kind
-      vim_item.kind = string.format("%s %s", icons[vim_item.kind], vim_item.kind)
-      return vim_item
+      luasnip.lsp_expand(args.body)
     end,
   },
   mapping = {
@@ -62,35 +57,29 @@ cmp.setup({
       i = cmp.mapping.abort(),
       c = cmp.mapping.close(),
     }),
-    ["<CR>"] = cmp.mapping.confirm({ select = true }),
     ["<Tab>"] = cmp.mapping(function(fallback)
       if cmp.visible() then
         cmp.select_next_item()
-      elseif require('luasnip').expandable() then
-        require('luasnip').expand()
-      elseif require('luasnip').expand_or_jumpable() then
-        require('luasnip').expand_or_jump()
-      elseif check_backspace() then
-        fallback()
+        -- You could replace the expand_or_jumpable() calls with expand_or_locally_jumpable()
+        -- they way you will only jump inside the snippet region
+      elseif luasnip.expand_or_jumpable() then
+        luasnip.expand_or_jump()
+      elseif has_words_before() then
+        cmp.complete()
       else
         fallback()
       end
-    end, {
-      "i",
-      "s",
-    }),
+    end, { "i", "s" }),
+
     ["<S-Tab>"] = cmp.mapping(function(fallback)
       if cmp.visible() then
         cmp.select_prev_item()
-      elseif require('luasnip').jumpable(-1) then
-        require('luasnip').jump(-1)
+      elseif luasnip.jumpable(-1) then
+        luasnip.jump(-1)
       else
         fallback()
       end
-    end, {
-      "i",
-      "s",
-    }),
+    end, { "i", "s" }),
   },
   sources = {
     { name = "nvim_lsp" },