Add optional nofollow parameter to linky

Author: stianjensen

src/ngSanitize/filter/linky.js

@@ -15,6 +15,7 @@
  *
  * @param {string} text Input text.
  * @param {string} target Window (_blank|_self|_parent|_top) or named frame to open links in.
+ * @param {boolean} nofollow Add rel=nofollow to links.
  * @returns {string} Html-linkified text.
  *
  * @usage
@@ -61,6 +62,15 @@
             <div ng-bind-html="snippetWithTarget | linky:'_blank'"></div>
           </td>
          </tr>
+         <tr id="linky-nofollow">
+          <td>linky nofollow</td>
+          <td>
+            <pre>&lt;div ng-bind-html="snippetWithNofollow | linky:'_self':true"&gt;<br>&lt;/div&gt;</pre>
+          </td>
+          <td>
+            <div ng-bind-html="snippetWithNofollow | linky:'_self':true"></div>
+          </td>
+         </tr>
          <tr id="escaped-html">
            <td>no filter</td>
            <td><pre>&lt;div ng-bind="snippet"&gt;<br>&lt;/div&gt;</pre></td>
@@ -99,6 +109,13 @@
             toBe('http://angularjs.org/');
         expect(element(by.css('#linky-target a')).getAttribute('target')).toEqual('_blank');
        });
+
+       it('should optionally add nofollow', function() {
+        expect(element(by.id('linky-nofollow')).
+            element(by.binding("snippetWithNofollow | linky:'_self':true")).getText()).
+            toBe('http://angularjs.org/');
+        expect(element(by.css('#linky-nofollow a')).getAttribute('rel')).toEqual('nofollow');
+       });
      </file>
    </example>
  */
@@ -107,7 +124,7 @@ angular.module('ngSanitize').filter('linky', ['$sanitize', function($sanitize) {
         /((ftp|https?):\/\/|(www\.)|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>"\u201d\u2019]/i,
       MAILTO_REGEXP = /^mailto:/i;
 
-  return function(text, target) {
+  return function(text, target, nofollow) {
     if (!text) return text;
     var match;
     var raw = text;
@@ -143,6 +160,9 @@ angular.module('ngSanitize').filter('linky', ['$sanitize', function($sanitize) {
                   target,
                   '" ');
       }
+      if (nofollow) {
+        html.push('rel="nofollow" ');
+      }
       html.push('href="',
                 url.replace(/"/g, '&quot;'),
                 '">');