Fixed insertion of snippets

nvim/init.lua

@@ -1,4 +1,5 @@
 -- install packer if not already there
+local is_bootstrap = false
 local install_path = vim.fn.stdpath 'data' .. '/site/pack/packer/start/packer.nvim'
 if vim.fn.empty(vim.fn.glob(install_path)) > 0 then
   is_bootstrap = true
@@ -13,7 +14,7 @@ require('packer').startup(function(use)
   use 'nvim-treesitter/nvim-treesitter'
   use {
     'hrsh7th/nvim-cmp',
-    requires = { 'hrsh7th/cmp-nvim-lsp', 'hrsh7th/cmp-buffer', 'hrsh7th/cmp-cmdline', 'hrsh7th/cmp-path', 'hrsh7th/cmp-nvim-lua', 'onsails/lspkind.nvim' }
+    requires = { 'hrsh7th/cmp-nvim-lsp', 'hrsh7th/cmp-buffer', 'hrsh7th/cmp-cmdline', 'hrsh7th/cmp-path', 'hrsh7th/cmp-nvim-lua', 'onsails/lspkind.nvim', 'L3MON4D3/LuaSnip', 'saadparwaiz1/cmp_luasnip' }
   }
   if is_bootstrap then
     require('packer').sync()
@@ -46,6 +47,10 @@ local lsp_flags = {
   
 }
 
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+-- capabilities.textDocument.completion.completionItem.snippetSupport = true
+capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)
+
 -- lsp configs
 require('lspconfig')['tsserver'].setup{
   on_attach = on_attach,
@@ -62,6 +67,12 @@ require('lspconfig')['gopls'].setup{
   flags = lsp_flags
 }
 
+require('lspconfig')['emmet_ls'].setup{
+  on_attach = on_attach,
+  flags = lsp_flags,
+  capabilities = capabilities
+}
+
 -- TreeSitter Config
 require('nvim-treesitter.configs').setup{
   ensure_installed = {'go', 'vim', 'typescript', 'help', 'lua', 'javascript', 'python'},
@@ -73,24 +84,48 @@ require('nvim-treesitter.configs').setup{
 -- autocompletion
 local cmp = require 'cmp'
 local lspkind = require 'lspkind'
+local luasnip = require 'luasnip'
+
+luasnip.config.setup {}
+
 cmp.setup {
-  sources = {
-    { name = 'nvim_lsp' },
-    { name = 'buffer' },
-    { name = 'cmdline' },
-    { name = 'path' },
-    { name = 'nvim-lua' }
-  },
   formatting = {
     format = lspkind.cmp_format()
   },
+  snippet = {
+    expand = function(args)
+      luasnip.lsp_expand(args.body)
+    end,
+  },
   mapping = cmp.mapping.preset.insert {
+    ['<C-d>'] = cmp.mapping.scroll_docs(-4),
+    ['<C-f>'] = cmp.mapping.scroll_docs(4),
+    ['<C-Space>'] = cmp.mapping.complete {},
+    ['<CR>'] = cmp.mapping.confirm {
+      behavior = cmp.ConfirmBehavior.Replace,
+      select = true,
+    },
     ['<Tab>'] = cmp.mapping(function(fallback)
       if cmp.visible() then
         cmp.select_next_item()
+      elseif luasnip.expand_or_jumpable() then
+        luasnip.expand_or_jump()
       else
         fallback()
       end
-    end, {'i', 's'})
-  }
+    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 = {
+    { name = 'nvim_lsp' },
+    { name = 'luasnip' },
+  },
 }