Change mappings for cmp

lua/plugins/cmp.lua

@@ -32,7 +32,7 @@ return {
             }
           },
         },
-        config = function ()
+        config = function()
           require("copilot_cmp").setup()
         end
       },
@@ -40,6 +40,12 @@ return {
     config = function()
       local cmp = require('cmp')
       local lspkind = require('lspkind')
+      local luasnip = require('luasnip')
+      local has_words_before = function()
+        unpack = unpack or table.unpack
+        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 = {
@@ -53,18 +59,44 @@ return {
           ['<C-b>'] = cmp.mapping.scroll_docs(-4),
           ['<C-f>'] = cmp.mapping.scroll_docs(4),
           ['<C-Space>'] = cmp.mapping.complete(),
-          ['<C-e>'] = cmp.mapping.close(),
+          ['<C-e>'] = cmp.mapping.abort(),
           ['<C-CR>'] = cmp.mapping.confirm({
             behavior = cmp.ConfirmBehavior.Replace,
             select = true,
           }),
-          ['<Tab>'] = function(fallback)
+          ["<CR>"] = cmp.mapping({
-            if cmp.visible() then
+            i = function(fallback)
-              cmp.select_next_item()
+              if cmp.visible() and cmp.get_active_entry() then
+                cmp.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = false })
               else
                 fallback()
               end
+            end,
+            s = cmp.mapping.confirm({ select = true }),
+            c = cmp.mapping.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = true }),
+          }),
+          ["<Tab>"] = cmp.mapping(function(fallback)
+            if cmp.visible() then
+              cmp.select_next_item()
+              -- You could replace the expand_or_jumpable() calls with expand_or_locally_jumpable()
+              -- they way you will only jump inside the snippet region
+            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' },