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   1  <?php
   2  
   3  /**
   4   * Performs miscellaneous cross attribute validation and filtering for
   5   * input elements. This is meant to be a post-transform.
   6   */
   7  class HTMLPurifier_AttrTransform_Input extends HTMLPurifier_AttrTransform {
   8  
   9      protected $pixels;
  10  
  11      public function __construct() {
  12          $this->pixels = new HTMLPurifier_AttrDef_HTML_Pixels();
  13      }
  14  
  15      public function transform($attr, $config, $context) {
  16          if (!isset($attr['type'])) $t = 'text';
  17          else $t = strtolower($attr['type']);
  18          if (isset($attr['checked']) && $t !== 'radio' && $t !== 'checkbox') {
  19              unset($attr['checked']);
  20          }
  21          if (isset($attr['maxlength']) && $t !== 'text' && $t !== 'password') {
  22              unset($attr['maxlength']);
  23          }
  24          if (isset($attr['size']) && $t !== 'text' && $t !== 'password') {
  25              $result = $this->pixels->validate($attr['size'], $config, $context);
  26              if ($result === false) unset($attr['size']);
  27              else $attr['size'] = $result;
  28          }
  29          if (isset($attr['src']) && $t !== 'image') {
  30              unset($attr['src']);
  31          }
  32          if (!isset($attr['value']) && ($t === 'radio' || $t === 'checkbox')) {
  33              $attr['value'] = '';
  34          }
  35          return $attr;
  36      }
  37  
  38  }
  39  
  40  // vim: et sw=4 sts=4