Compass 2934 don not autocomplete in comments

lib/stage-autocompleter.js

@@ -124,6 +124,53 @@ class StageAutoCompleter {
   getCompletions(editor, session, position, prefix, done) {
     // Empty prefixes do not return results.
     if (prefix === '') return done(null, []);
+
+    // Comments block do not return results.
+    const getMatches = (str, regex) => {
+      regex.lastIndex = 0;
+
+      const matches = [];
+      let match = regex.exec(str);
+
+      while (match) {
+        matches.push(match);
+
+        if (regex.lastIndex === match.index) {
+          regex.lastIndex++;
+        }
+
+        match = regex.exec(str);
+      }
+
+      return matches;
+    };
+    let value = session.getValue();
+    const findStringsWithSlashesRe = /("(?:[^"\\]*|\\[\S\s])*"|'(?:[^'\\]*|\\[\S\s])*')/gm;
+    const stringSlashes = getMatches(value, findStringsWithSlashesRe);
+
+    stringSlashes.forEach((item) => {
+      value = [
+        value.slice(0, item.index),
+        '#'.repeat(item[0].length),
+        value.slice(item.index + item[0].length)
+      ].join('');
+    });
+
+    const findCommentsRe = /(?:\/\*(?:[\s\S]*?)\*\/)|(?:\s*\/\/(?:.*)$)/gm;
+    const comments = getMatches(value, findCommentsRe);
+    const activePosition = session.getDocument().positionToIndex(position, 0);
+    let isComment = false;
+
+    comments.forEach((item) => {
+      if (item.index < activePosition && activePosition <= (item.index + item[0].length)) {
+        isComment = true;
+      }
+    });
+
+    if (isComment === true) {
+      return done(null, []);
+    }
+
     // If the current token is a string with single or double quotes, then
     // we want to use the local text completer instead of suggesting operators.
     // This is so we can suggest user variable names inside the pipeline that they
@@ -141,7 +188,7 @@ class StageAutoCompleter {
       this.queryAutoCompleter.getCompletions(editor, session, position, prefix, done);
     } else {
       const expressions = BASE_COMPLETIONS.concat(this.accumulators()).concat(this.fields);
-      done(null, filter(this.version, expressions, prefix));
+      return done(null, filter(this.version, expressions, prefix));
     }
   }
 }