add neovim configs

nvim/lua/hmsy/cmp.lua

@@ -0,0 +1,51 @@
+local luasnip = require("luasnip")
+local cmp = require('cmp')
+
+local has_words_before = function()
+	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
+
+cmp.setup {
+	snippet = {
+		expand = function(args)
+			luasnip.lsp_expand(args.body)
+		end,
+	},
+	mapping = {
+		['<C-b>'] = cmp.mapping.scroll_docs(-4),
+		['<C-f>'] = cmp.mapping.scroll_docs(4),
+		['<C-Space>'] = cmp.mapping.complete(),
+		['<C-e>'] = cmp.mapping.abort(),
+		['<CR>'] = cmp.mapping.confirm({ select = true }),
+		["<Tab>"] = cmp.mapping(function(fallback)
+			if cmp.visible() then
+				cmp.select_next_item()
+			elseif luasnip.expand_or_jumpable() then
+				luasnip.expand_or_jump()
+			elseif has_words_before() then
+				cmp.complete()
+			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" }),
+	},
+	sources = cmp.config.sources({
+		{ name = 'nvim_lsp' },
+		{ name = 'luasnip' },
+	}, {
+		{ name = 'buffer' },
+	}),
+	expreimental = {
+		ghost_text = true,
+	},
+}