Refactor typographer replacements functions

lib/rules_core/replacements.js

@@ -55,20 +55,15 @@ function replace_scoped(inlineTokens) {
   }
 }
 
-function replace_rare(inlineTokens) {
+function replace_helper(inlineTokens, re, replacer) {
   var i, token, inside_autolink = 0;
 
   for (i = inlineTokens.length - 1; i >= 0; i--) {
     token = inlineTokens[i];
 
     if (token.type === 'text' && !inside_autolink) {
-      if (RARE_RE.test(token.content)) {
-        token.content = token.content
-          .replace(/\+-/g, '±')
-          // .., ..., ....... -> …
-          // but ?..... & !..... -> ?.. & !..
-          .replace(/\.{2,}/g, '…').replace(/([?!])…/g, '$1..')
-          .replace(/([?!]){4,}/g, '$1$1$1').replace(/,{2,}/g, ',');
+      if (re.test(token.content)) {
+        token.content = replacer(token.content);
       }
     }
 
@@ -82,31 +77,26 @@ function replace_rare(inlineTokens) {
   }
 }
 
-function replace_dashes(inlineTokens) {
-  var i, token, inside_autolink = 0;
-
-  for (i = inlineTokens.length - 1; i >= 0; i--) {
-    token = inlineTokens[i];
-
-    if (token.type === 'text' && !inside_autolink) {
-      if (DASHES_RE.test(token.content)) {
-        token.content = token.content
-          // em-dash
-          .replace(/(^|[^-])---(?=[^-]|$)/mg, '$1\u2014')
-          // en-dash
-          .replace(/(^|\s)--(?=\s|$)/mg, '$1\u2013')
-          .replace(/(^|[^-\s])--(?=[^-\s]|$)/mg, '$1\u2013');
-      }
-    }
-
-    if (token.type === 'link_open' && token.info === 'auto') {
-      inside_autolink--;
-    }
+function replace_rare(inlineTokens) {
+  replace_helper(inlineTokens, RARE_RE, function (content) {
+    return content
+      .replace(/\+-/g, '±')
+      // .., ..., ....... -> …
+      // but ?..... & !..... -> ?.. & !..
+      .replace(/\.{2,}/g, '…').replace(/([?!])…/g, '$1..')
+      .replace(/([?!]){4,}/g, '$1$1$1').replace(/,{2,}/g, ',');
+  });
+}
 
-    if (token.type === 'link_close' && token.info === 'auto') {
-      inside_autolink++;
-    }
-  }
+function replace_dashes(inlineTokens) {
+  replace_helper(inlineTokens, DASHES_RE, function (content) {
+    return content
+      // em-dash
+      .replace(/(^|[^-])---(?=[^-]|$)/mg, '$1\u2014')
+      // en-dash
+      .replace(/(^|\s)--(?=\s|$)/mg, '$1\u2013')
+      .replace(/(^|[^-\s])--(?=[^-\s]|$)/mg, '$1\u2013');
+  });
 }
 
 module.exports = function replace(state) {