neovim: support choice nodes for luasnip

Also turn on short keys for moving between windows

home/.config/nvim/lua/mappings.lua

@@ -38,10 +38,10 @@ wk.register({
     L = {'$', 'End of the line'},
 
     -- Easier moving between windows
-    -- ['<C-h>'] = {'<C-w>h', 'Go to the left window'},
-    -- ['<C-l>'] = {'<C-w>l', 'Go to the right window'},
-    -- ['<C-j>'] = {'<C-w>j', 'Go to the down window'},
-    -- ['<C-k>'] = {'<C-w>k', 'Go to the up window'},
+    ['<C-h>'] = {'<C-w>h', 'Go to the left window'},
+    ['<C-l>'] = {'<C-w>l', 'Go to the right window'},
+    ['<C-j>'] = {'<C-w>j', 'Go to the down window'},
+    ['<C-k>'] = {'<C-w>k', 'Go to the up window'},
 
     -- Copy the whole buffer
     ['<C-a>'] = {'<Cmd>%y+<CR>', 'Copy whole buffer'},

home/.config/nvim/lua/modules/completion.lua

@@ -70,6 +70,21 @@ function M.cmp_conf()
             ['<C-d>'] = cmp.mapping.scroll_docs(-4),
             ['<C-f>'] = cmp.mapping.scroll_docs(4),
             ['<C-e>'] = cmp.mapping.close(),
+            -- Change choice nodes for luasnip
+            ['<C-h>'] = cmp.mapping(function(fallback)
+                if luasnip.choice_active() then
+                    vim.fn.feedkeys(t('<Plug>luasnip-prev-choice'), '')
+                else
+                    fallback()
+                end
+            end, {'i', 's'}),
+            ['<C-l>'] = cmp.mapping(function(fallback)
+                if luasnip.choice_active() then
+                    vim.fn.feedkeys(t('<Plug>luasnip-next-choice'), '')
+                else
+                    fallback()
+                end
+            end, {'i', 's'}),
             -- supertab-like mapping
             ['<Tab>'] = cmp.mapping(function(fallback)
                 if vim.fn.pumvisible() == 1 then
@@ -123,9 +138,23 @@ function M.autopairs_conf()
 end
 
 function M.snippets_conf()
+    local types = require('luasnip.util.types')
+
     require('luasnip').config.set_config({
         updateevents = 'TextChanged, TextChangedI',
-        history = true
+        history = true,
+        ext_opts = {
+            [types.choiceNode] = {
+                active = {
+                    virt_text = {{'●', 'Number'}}
+                }
+            },
+            [types.insertNode] = {
+                active = {
+                    virt_text = {{'●', 'Keyword'}}
+                }
+            }
+        }
     })
 
     -- Loading vscode-like snippets from 'friendly-snippets'