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     /**
  13      * @type HTMLPurifier_URIParser
  14      */
  15     private $parser;
  16
  17     public function __construct()
  18     {
  19         $this->parser = new HTMLPurifier_URIParser();
  20     }
  21
  22     /**
  23      * @param array $attr
  24      * @param HTMLPurifier_Config $config
  25      * @param HTMLPurifier_Context $context
  26      * @return array
  27      */
  28     public function transform($attr, $config, $context)
  29     {
  30         if (!isset($attr['href'])) {
  31             return $attr;
  32         }
  33
  34         // XXX Kind of inefficient
  35         $url = $this->parser->parse($attr['href']);
  36         $scheme = $url->getSchemeObj($config, $context);
  37
  38         if ($scheme->browsable && !$url->isBenign($config, $context)) {
  39             $attr['target'] = '_blank';
  40         }
  41         return $attr;
  42     }
  43 }
  44
  45 // vim: et sw=4 sts=4