Optimized typographer replacements

lib/rules_core/replacements.js

@@ -6,9 +6,28 @@
 // - fractionals 1/2, 1/4, 3/4 -> ½, ¼, ¾
 // - miltiplication 2 x 4 -> 2 × 4
 
-var COPY_RE = /\((c|tm|r|p)\)/i;
 var RARE_RE = /\+-|\.\.|\?\?\?\?|!!!!|,,|--/;
 
+var SCOPED_ABBR_RE = /\((c|tm|r|p)\)/ig;
+var SCOPED_ABBR = {
+  'c': '©',
+  'r': '®',
+  'p': '§',
+  'tm': '™'
+};
+
+function replaceScopedAbbr(str) {
+  if (str.indexOf('(') < 0) { return str; }
+
+  return str.replace(SCOPED_ABBR_RE, function(match, name) {
+    if (SCOPED_ABBR.hasOwnProperty(name.toLowerCase())) {
+      return SCOPED_ABBR[name.toLowerCase()];
+    }
+    return match;
+  });
+}
+
+
 module.exports = function replace(state) {
   var i, token, text, inlineTokens, blkIdx;
 
@@ -25,12 +44,7 @@ module.exports = function replace(state) {
       if (token.type === 'text') {
         text = token.content;
 
-        if (COPY_RE.test(text)) {
-          text = text.replace(/\(c\)/gi, '©')
-                      .replace(/\(tm\)/gi, '™')
-                      .replace(/\(r\)/gi, '®')
-                      .replace(/\(p\)/gi, '§');
-        }
+        text = replaceScopedAbbr(text);
 
         if (RARE_RE.test(text)) {
           text = text.replace(/\+-/g, '±')