Feat: set nice completion mapping with tab and enter

nvim/.config/nvim/lua/completion.lua

@@ -41,7 +41,7 @@ local lsp_symbols = {
 local cmp = require'cmp'
 cmp.setup{
     completion = {
-        completeopt =  'menuone,noselect',
+        completeopt =  'menuone,noinsert,noselect',
     },
     formatting = {
         format = function(entry, vim_item)
@@ -64,8 +64,27 @@ cmp.setup{
         end,
     },
     mapping = {
-        -- ["<cr>"] = cmp.mapping.confirm({select = true, behavior = cmp.ConfirmBehavior.Replace}),
+        ["<cr>"] = cmp.mapping.confirm({select = false, behavior = cmp.ConfirmBehavior.Replace}),
-        ["<Tab>"] = cmp.mapping.confirm({select = true, behavior = cmp.ConfirmBehavior.Insert}),
+        -- ["<Tab>"] = cmp.mapping.confirm({select = true, behavior = cmp.ConfirmBehavior.Insert}),
+        ["<Tab>"] = cmp.mapping(function(fallback)
+            if cmp.visible() then
+                cmp.select_next_item()
+            elseif vim.fn["vsnip#available"](1) == 1 then
+                feedkey("<Plug>(vsnip-expand-or-jump)", "")
+            elseif has_words_before() then
+                cmp.complete()
+            else
+                fallback() -- The fallback function sends a already mapped key. In this case, it's probably `<Tab>`.
+            end
+        end, { "i", "s" }),
+
+        ["<S-Tab>"] = cmp.mapping(function()
+            if cmp.visible() then
+                cmp.select_prev_item()
+            elseif vim.fn["vsnip#jumpable"](-1) == 1 then
+                feedkey("<Plug>(vsnip-jump-prev)", "")
+            end
+        end, { "i", "s" }),
     },
     sources = {
         { name = 'vsnip' },
@@ -91,5 +110,14 @@ cmp.setup{
     },
 }
 
+-- Use buffer source for `/` (if you enabled `native_menu`, this won't work anymore).
+cmp.setup.cmdline('/', {
+    mapping = cmp.mapping.preset.cmdline(),
+    sources = {
+        { name = 'buffer' }
+    }
+})
+
+
 vim.cmd [[autocmd FileType TelescopePrompt lua require('cmp').setup.buffer { enabled = false }]]
 vim.g.vsnip_snippet_dir = '~/.config/nvim/vsnips'