library/HTMLPurifier/AttrDef/ListStyle.php

   1 <?php
   2
   3 require_once 'HTMLPurifier/AttrDef.php';
   4
   5 /**
   6  * Validates shorthand CSS property list-style.
   7  * @note This currently does not support list-style-image, as that functionality
   8  *       is not implemented yet elsewhere.
   9  */
  10 class HTMLPurifier_AttrDef_ListStyle extends HTMLPurifier_AttrDef
  11 {
  12
  13     /**
  14      * Local copy of component validators.
  15      * @note See HTMLPurifier_AttrDef_Font::$info for a similar impl.
  16      */
  17     var $info;
  18
  19     function HTMLPurifier_AttrDef_ListStyle($config) {
  20         $def = $config->getCSSDefinition();
  21         $this->info['list-style-type']     = $def->info['list-style-type'];
  22         $this->info['list-style-position'] = $def->info['list-style-position'];
  23     }
  24
  25     function validate($string, $config, &$context) {
  26
  27         // regular pre-processing
  28         $string = $this->parseCDATA($string);
  29         if ($string === '') return false;
  30
  31         $bits = explode(' ', strtolower($string)); // bits to process
  32
  33         $caught_type = false;
  34         $caught_position = false;
  35         $caught_none = false; // as in keyword none, which is in all of them
  36
  37         $ret = '';
  38
  39         foreach ($bits as $bit) {
  40             if ($caught_none && ($caught_type || $caught_position)) break;
  41             if ($caught_type && $caught_position) break;
  42
  43             if ($bit === '') continue;
  44
  45             if ($bit === 'none') {
  46                 if ($caught_none) continue;
  47                 $caught_none = true;
  48                 $ret .= 'none ';
  49                 continue;
  50             }
  51
  52             // if we add anymore, roll it into a loop
  53
  54             $r = $this->info['list-style-type']->validate($bit, $config, $context);
  55             if ($r !== false) {
  56                 if ($caught_type) continue;
  57                 $caught_type = true;
  58                 $ret .= $r . ' ';
  59                 continue;
  60             }
  61
  62             $r = $this->info['list-style-position']->validate($bit, $config, $context);
  63             if ($r !== false) {
  64                 if ($caught_position) continue;
  65                 $caught_position = true;
  66                 $ret .= $r . ' ';
  67                 continue;
  68             }
  69         }
  70
  71         $ret = rtrim($ret);
  72         return $ret ? $ret : false;
  73
  74     }
  75
  76 }
  77
  78 ?>