change approach

src/language-css/parser-postcss.js

@@ -14,13 +14,7 @@ const isSCSS = require("./utils/is-scss.js");
 const isSCSSNestedPropertyNode = require("./utils/is-scss-nested-property-node.js");
 const isSCSSVariable = require("./utils/is-scss-variable.js");
 const isModuleRuleName = require("./utils/is-module-rule-name.js");
-
-const getHighestAncestor = (node) => {
-  while (node.parent) {
-    node = node.parent;
-  }
-  return node;
-};
+const getHighestAncestor = require("./utils/get-highest-ancestor.js");
 
 function parseValueNode(valueNode, options) {
   const { nodes } = valueNode;
@@ -156,24 +150,6 @@ function flattenGroups(node) {
   return node;
 }
 
-function purgeNodes(node) {
-  if (!node || typeof node !== "object") {
-    return;
-  }
-  if (node.type?.startsWith("selector-")) {
-    return;
-  }
-  if ("nodes" in node) {
-    delete node.nodes;
-  }
-  for (const key in node) {
-    if (key === "parent") {
-      continue;
-    }
-    purgeNodes(node[key]);
-  }
-}
-
 function addTypePrefix(node, prefix, skipPrefix) {
   if (node && typeof node === "object") {
     delete node.parent;
@@ -212,10 +188,10 @@ function parseNestedValue(node, options) {
         parseNestedValue(node[key], options);
         if (key === "nodes") {
           node.group = flattenGroups(parseValueNode(node, options));
+          delete node[key];
         }
       }
     }
-    delete node.parent;
   }
   return node;
 }
@@ -238,8 +214,6 @@ function parseValue(value, options) {
 
   const parsedResult = parseNestedValue(result, options);
 
-  purgeNodes(parsedResult);
-
   return addTypePrefix(parsedResult, "value-", /^selector-/);
 }
 

src/language-css/utils/get-highest-ancestor.js

@@ -0,0 +1,10 @@
+"use strict";
+
+const getHighestAncestor = (node) => {
+  while (node.parent) {
+    node = node.parent;
+  }
+  return node;
+};
+
+module.exports = getHighestAncestor;

src/language-css/utils/stringify-func-param.js

@@ -1,16 +1,17 @@
 "use strict";
 
+const getHighestAncestor = require("./get-highest-ancestor.js");
+
 /**
  * @param {*} node
  * @returns {string}
  */
 function stringifyFuncParam(node) {
-  const text = node.toString();
-  const innerText = text
-    .trim()
-    .replace(new RegExp(`^${node.value}\\(`), "")
-    .replace(/\)$/, "")
-    .trim();
+  const text = getHighestAncestor(node).text.slice(
+    node.group.open.sourceIndex + 1,
+    node.group.close.sourceIndex
+  );
+  const innerText = text.trim();
   return innerText;
 }