library/HTMLPurifier/Injector/PurifierLinkify.php

   1 <?php
   2
   3 /**
   4  * Injector that converts configuration directive syntax %Namespace.Directive
   5  * to links
   6  */
   7 class HTMLPurifier_Injector_PurifierLinkify extends HTMLPurifier_Injector
   8 {
   9     /**
  10      * @type string
  11      */
  12     public $name = 'PurifierLinkify';
  13
  14     /**
  15      * @type string
  16      */
  17     public $docURL;
  18
  19     /**
  20      * @type array
  21      */
  22     public $needed = array('a' => array('href'));
  23
  24     /**
  25      * @param HTMLPurifier_Config $config
  26      * @param HTMLPurifier_Context $context
  27      * @return string
  28      */
  29     public function prepare($config, $context)
  30     {
  31         $this->docURL = $config->get('AutoFormat.PurifierLinkify.DocURL');
  32         return parent::prepare($config, $context);
  33     }
  34
  35     /**
  36      * @param HTMLPurifier_Token $token
  37      */
  38     public function handleText(&$token)
  39     {
  40         if (!$this->allowsElement('a')) {
  41             return;
  42         }
  43         if (strpos($token->data, '%') === false) {
  44             return;
  45         }
  46
  47         $bits = preg_split('#%([a-z0-9]+\.[a-z0-9]+)#Si', $token->data, -1, PREG_SPLIT_DELIM_CAPTURE);
  48         $token = array();
  49
  50         // $i = index
  51         // $c = count
  52         // $l = is link
  53         for ($i = 0, $c = count($bits), $l = false; $i < $c; $i++, $l = !$l) {
  54             if (!$l) {
  55                 if ($bits[$i] === '') {
  56                     continue;
  57                 }
  58                 $token[] = new HTMLPurifier_Token_Text($bits[$i]);
  59             } else {
  60                 $token[] = new HTMLPurifier_Token_Start(
  61                     'a',
  62                     array('href' => str_replace('%s', $bits[$i], $this->docURL))
  63                 );
  64                 $token[] = new HTMLPurifier_Token_Text('%' . $bits[$i]);
  65                 $token[] = new HTMLPurifier_Token_End('a');
  66             }
  67         }
  68     }
  69 }
  70
  71 // vim: et sw=4 sts=4