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   1  matches.forEach(function(m)
   2  {
   3      // Linkify the trimmed URL
   4      linkifyUrl(m[0][1], trimUrl(m[0][0]));
   5  });
   6  
   7  /**
   8  * Linkify given URL at given position
   9  *
  10  * @param {number} tagPos URL's position in the text
  11  * @param {string} url    URL
  12  */
  13  function linkifyUrl(tagPos, url)
  14  {
  15      // Create a zero-width end tag right after the URL
  16      var endPos = tagPos + url.length,
  17          endTag = addEndTag(config.tagName, endPos, 0);
  18  
  19      // If the URL starts with "www." we prepend "http://"
  20      if (url[3] === '.')
  21      {
  22          url = 'http://' + url;
  23      }
  24  
  25      // Create a zero-width start tag right before the URL, with a slightly worse priority to
  26      // allow specialized plugins to use the URL instead
  27      var startTag = addStartTag(config.tagName, tagPos, 0, 1);
  28      startTag.setAttribute(config.attrName, url);
  29  
  30      // Pair the tags together
  31      startTag.pairWith(endTag);
  32  
  33      // Protect the tag's content from partial replacements with a low priority tag
  34      var contentTag = addVerbatim(tagPos, endPos - tagPos, 1000);
  35      startTag.cascadeInvalidationTo(contentTag);
  36  }
  37  
  38  /**
  39  * Remove trailing punctuation from given URL
  40  *
  41  * We remove most ASCII non-letters from the end of the string.
  42  * Exceptions:
  43  *  - dashes and underscores, (base64 IDs could end with one)
  44  *  - equal signs, (because of "foo?bar=")
  45  *  - plus signs, (used by some file share services to force download)
  46  *  - trailing slashes,
  47  *  - closing parentheses. (they are balanced separately)
  48  *
  49  * @param  {string} url Original URL
  50  * @return {string}     Trimmed URL
  51  */
  52  function trimUrl(url)
  53  {
  54      return url.replace(/(?:(?![-=+)\/_])[\s!-.:-@[-`{-~])+$/, '');
  55  }