Move csslint-loader to background

background/csslint-loader.js

@@ -0,0 +1,41 @@
+/* global importScripts parserlib CSSLint parseMozFormat */
+'use strict';
+
+const CSSLINT_PATH = '/vendor-overwrites/csslint/';
+importScripts(CSSLINT_PATH + 'parserlib.js');
+
+parserlib.css.Tokens[parserlib.css.Tokens.COMMENT].hide = false;
+
+self.onmessage = ({data}) => {
+
+  const {action = 'run'} = data;
+
+  if (action === 'parse') {
+    if (!self.parseMozFormat) self.importScripts('/js/moz-parser.js');
+    self.postMessage(parseMozFormat(data));
+    return;
+  }
+
+  if (!self.CSSLint) self.importScripts(CSSLINT_PATH + 'csslint.js');
+
+  switch (action) {
+    case 'getAllRuleIds':
+      // the functions are non-tranferable and we need only an id
+      self.postMessage(CSSLint.getRules().map(rule => rule.id));
+      return;
+
+    case 'getAllRuleInfos':
+      // the functions are non-tranferable
+      self.postMessage(CSSLint.getRules().map(rule => JSON.parse(JSON.stringify(rule))));
+      return;
+
+    case 'run': {
+      const {code, config} = data;
+      const results = CSSLint.verify(code, config).messages
+        //.filter(m => !m.message.includes('/*[[') && !m.message.includes(']]*/'))
+        .map(m => Object.assign(m, {rule: {id: m.rule.id}}));
+      self.postMessage(results);
+      return;
+    }
+  }
+};

js/usercss.js

@@ -599,7 +599,7 @@ var usercss = (() => {
 
   function invokeWorker(message) {
     if (!worker.queue) {
-      worker.instance = new Worker('/edit/csslint-loader.js');
+      worker.instance = new Worker('/background/csslint-loader.js');
       worker.queue = [];
       worker.instance.onmessage = ({data}) => {
         worker.queue.shift().resolve(data.__ERROR__ ? Promise.reject(data.__ERROR__) : data);