use j and k for popups

init.lua

@@ -453,6 +453,8 @@ require('telescope').setup {
       i = {
         ['<C-u>'] = false,
         ['<C-d>'] = false,
+        ['<C-j>'] = require('telescope.actions').move_selection_next,
+        ['<C-k>'] = require('telescope.actions').move_selection_previous,
       },
     },
   },
@@ -602,28 +604,123 @@ vim.defer_fn(function()
         }
       end, { desc = '[S]earch [/] in Open Files' })
 
-      -- Shortcut for searching your Neovim configuration files
-      vim.keymap.set('n', '<leader>sn', function()
-        builtin.find_files { cwd = vim.fn.stdpath 'config' }
-      end, { desc = '[S]earch [N]eovim files' })
+  -- See `:help K` for why this keymap
+  nmap('K', vim.lsp.buf.hover, 'Hover Documentation')
+  nmap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')
+
+  -- Lesser used LSP functionality
+  nmap('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
+  nmap('<leader>wa', vim.lsp.buf.add_workspace_folder, '[W]orkspace [A]dd Folder')
+  nmap('<leader>wr', vim.lsp.buf.remove_workspace_folder, '[W]orkspace [R]emove Folder')
+  nmap('<leader>wl', function()
+    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
+  end, '[W]orkspace [L]ist Folders')
+
+  -- Create a command `:Format` local to the LSP buffer
+  vim.api.nvim_buf_create_user_command(bufnr, 'Format', function(_)
+    vim.lsp.buf.format()
+  end, { desc = 'Format current buffer with LSP' })
+end
+
+-- document existing key chains
+require('which-key').register {
+  ['<leader>c'] = { name = '[C]ode', _ = 'which_key_ignore' },
+  ['<leader>d'] = { name = '[D]ocument', _ = 'which_key_ignore' },
+  ['<leader>g'] = { name = '[G]it', _ = 'which_key_ignore' },
+  ['<leader>h'] = { name = 'Git [H]unk', _ = 'which_key_ignore' },
+  ['<leader>r'] = { name = '[R]ename', _ = 'which_key_ignore' },
+  ['<leader>s'] = { name = '[S]earch', _ = 'which_key_ignore' },
+  ['<leader>t'] = { name = '[T]oggle', _ = 'which_key_ignore' },
+  ['<leader>w'] = { name = '[W]orkspace', _ = 'which_key_ignore' },
+}
+-- register which-key VISUAL mode
+-- required for visual <leader>hs (hunk stage) to work
+require('which-key').register({
+  ['<leader>'] = { name = 'VISUAL <leader>' },
+  ['<leader>h'] = { 'Git [H]unk' },
+}, { mode = 'v' })
+
+-- mason-lspconfig requires that these setup functions are called in this order
+-- before setting up the servers.
+require('mason').setup()
+require('mason-lspconfig').setup()
+
+-- Enable the following language servers
+--  Feel free to add/remove any LSPs that you want here. They will automatically be installed.
+--
+--  Add any additional override configuration in the following tables. They will be passed to
+--  the `settings` field of the server config. You must look up that documentation yourself.
+--
+--  If you want to override the default filetypes that your language server will attach to you can
+--  define the property 'filetypes' to the map in question.
+local servers = {
+  -- clangd = {},
+  gopls = {},
+  -- pyright = {},
+  -- rust_analyzer = {},
+  -- tsserver = {},
+  html = { filetypes = { 'html' } },
+
+  lua_ls = {
+    Lua = {
+      workspace = { checkThirdParty = false },
+      telemetry = { enable = false },
+      -- NOTE: toggle below to ignore Lua_LS's noisy `missing-fields` warnings
+      -- diagnostics = { disable = { 'missing-fields' } },
+    },
+  },
+}
+
+-- Setup neovim lua configuration
+require('neodev').setup()
+
+-- nvim-cmp supports additional completion capabilities, so broadcast that to servers
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)
+
+-- Ensure the servers above are installed
+local mason_lspconfig = require 'mason-lspconfig'
+
+mason_lspconfig.setup {
+  ensure_installed = vim.tbl_keys(servers),
+}
+
+mason_lspconfig.setup_handlers {
+  function(server_name)
+    require('lspconfig')[server_name].setup {
+      capabilities = capabilities,
+      on_attach = on_attach,
+      settings = servers[server_name],
+      filetypes = (servers[server_name] or {}).filetypes,
+    }
+  end,
+}
+
+-- [[ Configure nvim-cmp ]]
+-- See `:help cmp`
+local cmp = require 'cmp'
+local luasnip = require 'luasnip'
+require('luasnip.loaders.from_vscode').lazy_load()
+luasnip.config.setup {}
+
+cmp.setup {
+  snippet = {
+    expand = function(args)
+      luasnip.lsp_expand(args.body)
     end,
   },
-
-  { -- LSP Configuration & Plugins
-    'neovim/nvim-lspconfig',
-    dependencies = {
-      -- Automatically install LSPs and related tools to stdpath for Neovim
-      { 'williamboman/mason.nvim', config = true }, -- NOTE: Must be loaded before dependants
-      'williamboman/mason-lspconfig.nvim',
-      'WhoIsSethDaniel/mason-tool-installer.nvim',
-
-      -- Useful status updates for LSP.
-      -- NOTE: `opts = {}` is the same as calling `require('fidget').setup({})`
-      { 'j-hui/fidget.nvim', opts = {} },
-
-      -- `neodev` configures Lua LSP for your Neovim config, runtime and plugins
-      -- used for completion, annotations and signatures of Neovim apis
-      { 'folke/neodev.nvim', opts = {} },
+  completion = {
+    completeopt = 'menu,menuone,noinsert',
+  },
+  mapping = cmp.mapping.preset.insert {
+    ['<C-j>'] = cmp.mapping.select_next_item(),
+    ['<C-k>'] = cmp.mapping.select_prev_item(),
+    ['<C-b>'] = cmp.mapping.scroll_docs(-4),
+    ['<C-f>'] = cmp.mapping.scroll_docs(4),
+    ['<C-Space>'] = cmp.mapping.complete {},
+    ['<CR>'] = cmp.mapping.confirm {
+      behavior = cmp.ConfirmBehavior.Replace,
+      select = true,
     },
     config = function()
       -- Brief aside: **What is LSP?**