Code completions menu with cmp

init.lua

@@ -1,2 +1,4 @@
 require ("vanilla")
 require ("plugin")
+require ("snippets")
+require ("completion")

lua/completion.lua

@@ -0,0 +1,121 @@
+vim.opt.completeopt = { "menu", "menuone", "popup" }
+
+local cmp = require("cmp")
+
+cmp.setup({
+	-- snippet setup configuration
+	snippet = {
+		expand = function(args)
+			vim.fn["UltiSnips#Anon"](args.body)
+		end,
+	},
+
+	-- Window/Menu
+	view = {
+		entries = "custom"
+	},
+
+	window = {
+		completion = cmp.config.window.bordered(),
+		documentation = cmp.config.window.bordered(),
+	},
+
+	-- Add ghost text because it's fancy
+	experimental = {
+		ghost_text = {},
+	},
+
+	-- mapping
+	mapping = cmp.mapping.preset.insert({
+		-- Shift+TAB to go to the Previous Suggested item
+		["<C-k>"] = cmp.mapping.select_prev_item(),
+		-- Tab to go to the next suggestion
+		["<C-j>"] = cmp.mapping.select_next_item(),
+		-- CTRL+SHIFT+f to scroll backwards in description
+		["<C-S-f>"] = cmp.mapping.scroll_docs(-4),
+		-- CTRL+F to scroll forwards in the description
+		["<C-f>"] = cmp.mapping.scroll_docs(4),
+		-- CTRL+SPACE to bring up completion at current Cursor location
+		["<C-Space>"] = cmp.mapping.complete(),
+		-- CTRL+e to exit suggestion and close it
+		["<C-d>"] = cmp.mapping.close(), -- TODO: Search better option
+		-- CR (enter or return) to CONFIRM the currently selection suggestion
+		-- We set the ConfirmBehavior to insert the Selected suggestion
+		["<CR>"] = cmp.mapping.confirm({
+			behavior = cmp.ConfirmBehavior.Insert,
+			select = true,
+		}),
+	}),
+
+	-- sources
+	sources = cmp.config.sources({
+		{ name = "path" },
+		{ name = "ultisnips", keyword_length = 1 },
+		{ name = "calc" },
+		{ name = "lua-latex-symbols", option = { cache = true } },
+		{ name = "buffer", keyword_length = 3 },
+		{ name = "nvim_lsp", keyword_length = 2},
+	}),
+	
+	-- formatting
+	formatting = {
+		fields = { "menu", "abbr", "kind" },
+		format = function (entry, item)
+			local menu_icon = {
+				path = "𝦶",
+				ultisnips = "✂",
+				calc = "Σ",
+				lualatexsymbols = "󰿈",
+				buffer = "󰘝",
+				nvim_lsp = "⌨"
+			}
+			item.menu = menu_icon[entry.source.name]
+			return item
+		end,
+	},
+})
+
+cmp.setup.cmdline({ "/", "?" }, {
+	mapping = cmp.mapping.preset.cmdline(),
+	sources = {
+		{ name = "buffer" },
+		{ name = "fuzzy_path", keyword_length = 4 },
+	},
+	formatting = {
+		fields = { "menu", "abbr", "kind" },
+		format = function(entry, item)
+			local menu_icon = {
+				buffer = "󰱼",
+				fuzzy_path = "",
+			}
+			item.menu = menu_icon[entry.source.name]
+			return item
+		end,
+	},
+})
+
+-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
+cmp.setup.cmdline(":", {
+	view = {
+		entries = { name = 'wildmenu', separator = "|" }
+	},
+	mapping = cmp.mapping.preset.cmdline(),
+	sources = cmp.config.sources({
+		{ name = "path" },
+		{ name = "cmdline_history", keyword_length = 24 },
+	}, {
+		{ name = "cmdline", keyword_length = 1 },
+	}),
+	formatting = {
+		fields = { "menu", "abbr", "kind" },
+		format = function(entry, item)
+			local menu_icon = {
+				path = "󰙅",
+				cmdline = "",
+				cmdline_history = "󰂺 ",
+			}
+			item.menu = menu_icon[entry.source.name]
+			return item
+		end,
+	},
+})

lua/plugin.lua

@@ -1,4 +1,31 @@
 require "paq" {
 	'savq/paq-nvim',
-	'mhartington/formatter.nvim'
+
+	-- Optics
+	'vim-airline/vim-airline',
+	'vim-airline/vim-airline-themes',
+	'ryanoasis/vim-devicons',
+	'mhinz/vim-startify',
+
+	-- Mason related stuff
+	-- 	Language server protocol
+	'neovim/nvim-lspconfig',
+	-- 	Formatter
+	'mhartington/formatter.nvim',
+
+	-- Editing
+	'cohama/lexima.vim',
+	'tpope/vim-surround',
+	'SirVer/UltiSnips',
+
+	-- Behavior
+	'dstein64/vim-startuptime',
+
+	-- Completions
+	'hrsh7th/cmp-nvim-lsp',
+	'hrsh7th/cmp-buffer',
+	'hrsh7th/cmp-path',
+	'hrsh7th/cmp-cmdline',
+	'hrsh7th/nvim-cmp',
+	'quangnguyen30192/cmp-nvim-ultisnips'
 }

lua/vanilla.lua

@@ -17,6 +17,7 @@ vim.opt.encoding = "UTF-8"
 vim.opt.conceallevel = 2
 vim.g.tex_flavor = "latex"
 vim.opt.showmatch = true
+vim.opt.colorscheme = "murphy"
 
 -- Spell
 vim.opt.spell = true