library/HTMLPurifier/AttrTransform/TargetBlank.php

   1 <?php
   2
   3 // must be called POST validation
   4
   5 /**
   6  * Adds target="blank" to all outbound links.  This transform is
   7  * only attached if Attr.TargetBlank is TRUE.  This works regardless
   8  * of whether or not Attr.AllowedFrameTargets
   9  */
  10 class HTMLPurifier_AttrTransform_TargetBlank extends HTMLPurifier_AttrTransform
  11 {
  12     private $parser;
  13
  14     public function __construct() {
  15         $this->parser = new HTMLPurifier_URIParser();
  16     }
  17
  18     public function transform($attr, $config, $context) {
  19
  20         if (!isset($attr['href'])) {
  21             return $attr;
  22         }
  23
  24         // XXX Kind of inefficient
  25         $url = $this->parser->parse($attr['href']);
  26         $scheme = $url->getSchemeObj($config, $context);
  27
  28         if ($scheme->browsable && !$url->isBenign($config, $context)) {
  29             $attr['target'] = '_blank';
  30         }
  31
  32         return $attr;
  33
  34     }
  35
  36 }
  37
  38 // vim: et sw=4 sts=4