lib/htmlpurifier/HTMLPurifier/Injector/PurifierLinkify.php

   1 <?php
   2
   3 require_once 'HTMLPurifier/Injector.php';
   4
   5 HTMLPurifier_ConfigSchema::define(
   6     'AutoFormat', 'PurifierLinkify', false, 'bool', '
   7 <p>
   8   Internal auto-formatter that converts configuration directives in
   9   syntax <a>%Namespace.Directive</a> to links. <code>a</code> tags
  10   with the <code>href</code> attribute must be allowed.
  11   This directive has been available since 2.0.1.
  12 </p>
  13 ');
  14
  15 HTMLPurifier_ConfigSchema::define(
  16     'AutoFormatParam', 'PurifierLinkifyDocURL', '#%s', 'string', '
  17 <p>
  18   Location of configuration documentation to link to, let %s substitute
  19   into the configuration\'s namespace and directive names sans the percent
  20   sign. This directive has been available since 2.0.1.
  21 </p>
  22 ');
  23
  24 /**
  25  * Injector that converts configuration directive syntax %Namespace.Directive
  26  * to links
  27  */
  28 class HTMLPurifier_Injector_PurifierLinkify extends HTMLPurifier_Injector
  29 {
  30
  31     var $name = 'PurifierLinkify';
  32     var $docURL;
  33     var $needed = array('a' => array('href'));
  34
  35     function prepare($config, &$context) {
  36         $this->docURL = $config->get('AutoFormatParam', 'PurifierLinkifyDocURL');
  37         return parent::prepare($config, $context);
  38     }
  39
  40     function handleText(&$token) {
  41         if (!$this->allowsElement('a')) return;
  42         if (strpos($token->data, '%') === false) return;
  43
  44         $bits = preg_split('#%([a-z0-9]+\.[a-z0-9]+)#Si', $token->data, -1, PREG_SPLIT_DELIM_CAPTURE);
  45         $token = array();
  46
  47         // $i = index
  48         // $c = count
  49         // $l = is link
  50         for ($i = 0, $c = count($bits), $l = false; $i < $c; $i++, $l = !$l) {
  51             if (!$l) {
  52                 if ($bits[$i] === '') continue;
  53                 $token[] = new HTMLPurifier_Token_Text($bits[$i]);
  54             } else {
  55                 $token[] = new HTMLPurifier_Token_Start('a',
  56                     array('href' => str_replace('%s', $bits[$i], $this->docURL)));
  57                 $token[] = new HTMLPurifier_Token_Text('%' . $bits[$i]);
  58                 $token[] = new HTMLPurifier_Token_End('a');
  59             }
  60         }
  61
  62     }
  63
  64 }
  65