feat(mapping): add all native mappings (#1430)

* feat(mapping): fully mimics the behavior of native `<C-n>` and `<C-p>`

Signed-off-by: Wuelner Martínez <wuelner.martinez@outlook.com>

* feat(mapping): added more native mappings to the `cmdline` preset

Signed-off-by: Wuelner Martínez <wuelner.martinez@outlook.com>

* fix(mapping): improved `<Tab>` and `<S-Tab>` mapppings of `cmdline`

Signed-off-by: Wuelner Martínez <wuelner.martinez@outlook.com>

---------

Signed-off-by: Wuelner Martínez <wuelner.martinez@outlook.com>

lua/cmp/config/mapping.lua

@@ -1,6 +1,5 @@
 local types = require('cmp.types')
 local misc = require('cmp.utils.misc')
-local feedkeys = require('cmp.utils.feedkeys')
 local keymap = require('cmp.utils.keymap')
 
 local function merge_keymaps(base, override)
@@ -43,10 +42,24 @@ mapping.preset.insert = function(override)
       i = mapping.select_prev_item({ behavior = types.cmp.SelectBehavior.Select }),
     },
     ['<C-n>'] = {
-      i = mapping.select_next_item({ behavior = types.cmp.SelectBehavior.Insert }),
+      i = function()
+        local cmp = require('cmp')
+        if cmp.visible() then
+          cmp.select_next_item({ behavior = types.cmp.SelectBehavior.Insert })
+        else
+          cmp.complete()
+        end
+      end,
     },
     ['<C-p>'] = {
-      i = mapping.select_prev_item({ behavior = types.cmp.SelectBehavior.Insert }),
+      i = function()
+        local cmp = require('cmp')
+        if cmp.visible() then
+          cmp.select_prev_item({ behavior = types.cmp.SelectBehavior.Insert })
+        else
+          cmp.complete()
+        end
+      end,
     },
     ['<C-y>'] = {
       i = mapping.confirm({ select = false }),
@@ -60,13 +73,23 @@ end
 ---Mapping preset cmdline-mode configuration.
 mapping.preset.cmdline = function(override)
   return merge_keymaps(override or {}, {
+    ['<C-z>'] = {
+      c = function()
+        local cmp = require('cmp')
+        if cmp.visible() then
+          cmp.select_next_item()
+        else
+          cmp.complete()
+        end
+      end,
+    },
     ['<Tab>'] = {
       c = function()
         local cmp = require('cmp')
         if cmp.visible() then
           cmp.select_next_item()
         else
-          feedkeys.call(keymap.t('<C-z>'), 'n')
+          cmp.complete()
         end
       end,
     },
@@ -76,7 +99,7 @@ mapping.preset.cmdline = function(override)
         if cmp.visible() then
           cmp.select_prev_item()
         else
-          feedkeys.call(keymap.t('<C-z>'), 'n')
+          cmp.complete()
         end
       end,
     },
@@ -101,7 +124,10 @@ mapping.preset.cmdline = function(override)
       end,
     },
     ['<C-e>'] = {
-      c = mapping.close(),
+      c = mapping.abort(),
+    },
+    ['<C-y>'] = {
+      c = mapping.confirm({ select = false }),
     },
   })
 end