Use snippets.nvim to handle LSP snippets

lua/completion.lua

@@ -97,6 +97,9 @@ local function hasConfirmedCompletion()
   local completed_item = api.nvim_get_vvar('completed_item')
   if completed_item.user_data.lsp ~= nil then
     applyAddtionalTextEdits(completed_item)
+    if vim.g.completion_enable_snippet == "snippets.nvim" then
+      require 'snippets'.expand_at_cursor(completed_item.user_data.actual_item, completed_item.word)
+    end
   end
   if opt.get_option('enable_auto_paren') == 1 then
     autoAddParens(completed_item)

lua/completion/source/lsp.lua

@@ -24,13 +24,15 @@ local function get_completion_word(item, prefix, suffix)
       else
           newText = item.textEdit.newText
       end
-    if protocol.InsertTextFormat[item.insertTextFormat] == "PlainText" then
+    if protocol.InsertTextFormat[item.insertTextFormat] == "PlainText"
+		or vim.g.completion_enable_snippet == "snippets.nvim" then
       return newText
     else
       return vim.lsp.util.parse_snippet(newText)
     end
   elseif item.insertText ~= nil and item.insertText ~= vim.NIL then
-    if protocol.InsertTextFormat[item.insertTextFormat] == "PlainText" then
+    if protocol.InsertTextFormat[item.insertTextFormat] == "PlainText"
+		or vim.g.completion_enable_snippet == "snippets.nvim" then
       return item.insertText
     else
       return vim.lsp.util.parse_snippet(item.insertText)
@@ -95,6 +97,11 @@ local function text_document_completion_list_to_complete_items(result, params)
         completion_item = completion_item,
       }
     }
+	if protocol.InsertTextFormat[completion_item.insertTextFormat] == 'Snippet'
+		and vim.g.completion_enable_snippet == "snippets.nvim" then
+	  item.user_data.actual_item = item.word
+	  item.word = completion_item.label
+	end
     local kind = protocol.CompletionItemKind[completion_item.kind]
     item.kind = customize_label[kind] or kind
     item.abbr = completion_item.label