Updated vimtex and snippets

lua/personal/luasnip-helper-funcs.lua

@@ -0,0 +1,42 @@
+local M = {}
+
+local ls = require("luasnip")
+local sn = ls.snippet_node
+local i = ls.insert_node
+local s = ls.snippet
+local isn = ls.indent_snippet_node
+local t = ls.text_node
+local f = ls.function_node
+local c = ls.choice_node
+local d = ls.dynamic_node
+local r = ls.restore_node
+local events = require("luasnip.util.events")
+local ai = require("luasnip.nodes.absolute_indexer")
+local fmt = require("luasnip.extras.fmt").fmt
+local m = require("luasnip.extras").m
+local lambda = require("luasnip.extras").l
+local postfix = require("luasnip.extras.postfix").postfix
+
+ls.config.setup{
+  -- Allow autotrigger snippets
+  enable_autosnippets = true,
+  -- For equivalent of UltiSnips visual selection
+  store_selection_keys = "<Tab>",
+  -- Event on which to check for exiting a snippet's region
+  region_check_events = 'InsertEnter',
+  delete_check_events = 'InsertLeave',
+}
+
+function M.get_ISO_8601_date()
+  return os.date("%Y-%m-%d")
+end
+
+function M.get_visual(args, parent)
+  if (#parent.snippet.env.LS_SELECT_RAW > 0) then
+    return sn(nil, i(1, parent.snippet.env.LS_SELECT_RAW))
+  else
+    return sn(nil, i(1, ''))
+  end
+end
+
+return M