From 3855d2ca4d14ce598cfbbd48c255e069e500b299 Mon Sep 17 00:00:00 2001
From: Andreas Lind <andreaslindpetersen@gmail.com>
Date: Sun, 18 Aug 2019 22:15:18 +0200
Subject: [PATCH] WIP, carried over from assetgraph/assetgraph#989

Awaiting https://github.com/shellscape/postcss-values-parser/issues/75
---
 lib/injectSubsetDefinitions.js  | 37 +++++++++++++++++----------------
 package.json                    |  2 +-
 test/injectSubsetDefinitions.js |  2 +-
 3 files changed, 21 insertions(+), 20 deletions(-)

diff --git a/lib/injectSubsetDefinitions.js b/lib/injectSubsetDefinitions.js
index ee531a96..4ddd0c75 100644
--- a/lib/injectSubsetDefinitions.js
+++ b/lib/injectSubsetDefinitions.js
@@ -5,30 +5,28 @@ function injectSubsetDefinitions(cssValue, webfontNameMap, replaceOriginal) {
   const subsetFontNames = new Set(
     Object.values(webfontNameMap).map(name => name.toLowerCase())
   );
-  const tokens = postcssValuesParser(cssValue).tokens;
-  let resultStr = '';
+  const rootNode = postcssValuesParser.parse(cssValue);
   let isPreceededByWords = false;
-  for (let i = 0; i < tokens.length; i += 1) {
-    const token = tokens[i];
+  for (const [i, node] of rootNode.nodes.entries()) {
     let possibleFontFamily;
     let lastFontFamilyTokenIndex = i;
-    if (token[0] === 'string') {
-      possibleFontFamily = unquote(token[1]);
-    } else if (token[0] === 'word') {
+    if (node.type === 'quoted') {
+      possibleFontFamily = unquote(node.value);
+    } else if (node.type === 'word') {
       if (!isPreceededByWords) {
         const wordSequence = [];
-        for (let j = i; j < tokens.length; j += 1) {
-          if (tokens[j][0] === 'word') {
-            wordSequence.push(tokens[j][1]);
+        for (let j = i; j < rootNode.nodes.length; j += 1) {
+          if (rootNode.nodes[j].type === 'word') {
+            wordSequence.push(rootNode.nodes[j].value);
             lastFontFamilyTokenIndex = j;
-          } else if (tokens[j][0] !== 'space') {
+          } else {
             break;
           }
         }
         possibleFontFamily = wordSequence.join(' ');
       }
       isPreceededByWords = true;
-    } else if (token[0] !== 'space') {
+    } else {
       isPreceededByWords = false;
     }
     if (possibleFontFamily) {
@@ -37,10 +35,14 @@ function injectSubsetDefinitions(cssValue, webfontNameMap, replaceOriginal) {
         // Bail out, a subset font is already listed
         return cssValue;
       } else if (webfontNameMap[possibleFontFamilyLowerCase]) {
-        resultStr += `'${webfontNameMap[possibleFontFamilyLowerCase].replace(
-          /'/g,
-          "\\'"
-        )}'`;
+        rootNode.insertBefore(
+          node,
+          `'${webfontNameMap[possibleFontFamilyLowerCase].replace(
+            /'/g,
+            "\\'"
+          )}', `
+        );
+        return rootNode.toString();
         if (replaceOriginal) {
           tokens.splice(i, lastFontFamilyTokenIndex - i + 1);
           i -= 1;
@@ -50,9 +52,8 @@ function injectSubsetDefinitions(cssValue, webfontNameMap, replaceOriginal) {
         }
       }
     }
-    resultStr += token[1];
   }
-  return resultStr;
+  return cssValue;
 }
 
 module.exports = injectSubsetDefinitions;
diff --git a/package.json b/package.json
index 5f17c055..f91ed2eb 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "font-tracer": "^1.1.0",
     "fontkit": "^1.8.0",
     "lodash.groupby": "^4.6.0",
-    "postcss-values-parser": "^2.0.1",
+    "postcss-values-parser": "^3.0.5",
     "pretty-bytes": "^5.1.0",
     "urltools": "^0.4.1",
     "yargs": "^12.0.2"
diff --git a/test/injectSubsetDefinitions.js b/test/injectSubsetDefinitions.js
index 4559690d..8773f971 100644
--- a/test/injectSubsetDefinitions.js
+++ b/test/injectSubsetDefinitions.js
@@ -42,7 +42,7 @@ describe('injectSubsetDefinitions', function() {
     expect(
       injectSubsetDefinitions('times   new   roman', webfontNameMap),
       'to equal',
-      "'times new roman__subset', times   new   roman"
+      "'times new roman__subset', times new roman"
     );
   });