refine completion keybinds

lua/conf/plugins/cmp.lua

@@ -7,7 +7,6 @@ end
 
 return { 'hrsh7th/nvim-cmp',
   requires = {
-    'danymat/neogen',
     'nvim-treesitter/nvim-treesitter',
     'lukas-reineke/cmp-under-comparator' -- better results
   },
@@ -26,7 +25,6 @@ return { 'hrsh7th/nvim-cmp',
   function()
     local cmp = require('cmp')
     local luasnip = require('luasnip')
-    local neogen = require('neogen')
 
     cmp.setup {
       -- disable when in comments
@@ -116,54 +114,30 @@ return { 'hrsh7th/nvim-cmp',
 
       -- mappings
       mapping = cmp.mapping.preset.insert {
-        ["<Tab>"] = cmp.mapping(function(fallback)
-          if #cmp.get_entries() == 1 then
+        ["<C-y>"] = cmp.mapping(function()
+          if cmp.get_active_entry() then
             cmp.confirm({ select = true })
-          elseif cmp.visible() then
+          elseif cmp.visible() and not cmp.get_active_entry() then
             cmp.select_next_item()
-          elseif luasnip.expand_or_locally_jumpable() then
-            luasnip.expand_or_jump()
-          elseif has_words_before() then
-            cmp.complete()
-            if #cmp.get_entries() == 1 then
-              cmp.confirm({ select = true })
-            end
-          elseif neogen.jumpable() then
-            neogen.jump_next()
-          else
-            fallback()
+            cmp.confirm({ select = true })
           end
-        end, { "i", "s" }),
+        end, { "i", "c" }),
 
-        ["<S-Tab>"] = cmp.mapping(function(fallback)
+        ["<C-n>"] = cmp.mapping(function()
+          if cmp.visible() then
+            cmp.select_next_item()
+          end
+        end),
+
+        ["<C-p>"] = cmp.mapping(function()
           if cmp.visible() then
             cmp.select_prev_item()
-          elseif luasnip.jumpable(-1) then
-            luasnip.jump(-1)
-          elseif neogen.jumpable(-1) then
-            neogen.jump_prev()
-          else
-            fallback()
           end
-        end, { "i", "s" }),
-
-        ['<CR>'] = cmp.mapping {
-          i = function(fallback)
-            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 }),
-        },
+        end),
 
         ["<C-u>"] = cmp.mapping.scroll_docs(-4),
         ["<C-d>"] = cmp.mapping.scroll_docs(4),
-        ['<ESC>'] = cmp.mapping.close(),
-        ["<C-e>"] = cmp.mapping.abort()
+        ['<ESC>'] = cmp.mapping.close()
       }
     }
   end