nvim: Add better support for lsp via omnifunc

Only reason I'm not using this is that there is no floating preview window

neovim/lua/_settings.lua

@@ -1,5 +1,6 @@
 local o = vim.o
 local g = vim.g
+local utils = require("utils")
 
 -- Set leader to space
 g.mapleader = " "
@@ -19,5 +20,11 @@ o.scrolloff = 3
 -- o.mousehide = true
 o.mouse = "a"
 
+-- Autocomplete options
+o.completeopt = "menuone,noinsert,noselect,preview"
+utils.augroup("close_preview", function()
+    vim.cmd("autocmd! CompleteDone * if pumvisible() == 0 | pclose | endif")
+end)
+
 local has = vim.fn.has
 g.is_mac = (has("mac") or has("macunix") or has("gui_macvim") or vim.fn.system("uname"):find("^darwin") ~= nil)

neovim/lua/plugins/lsp.lua

@@ -1,6 +1,10 @@
 -- luacheck: globals packer_plugins
+local utils = require("utils")
+
 local function default_attach(client, bufnr)
-    require('completion').on_attach()
+    if utils.is_plugin_loaded("completion-nvim") then
+        require('completion').on_attach()
+    end
 
     local function buf_set_keymap(...) vim.api.nvim_buf_set_keymap(bufnr, ...) end
     local function buf_set_option(...) vim.api.nvim_buf_set_option(bufnr, ...) end