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   1  <?php
   2  
   3  /**
   4   * Pre-transform that changes deprecated hspace and vspace attributes to CSS
   5   */
   6  class HTMLPurifier_AttrTransform_ImgSpace extends HTMLPurifier_AttrTransform {
   7  
   8      protected $attr;
   9      protected $css = array(
  10          'hspace' => array('left', 'right'),
  11          'vspace' => array('top', 'bottom')
  12      );
  13  
  14      public function __construct($attr) {
  15          $this->attr = $attr;
  16          if (!isset($this->css[$attr])) {
  17              trigger_error(htmlspecialchars($attr) . ' is not valid space attribute');
  18          }
  19      }
  20  
  21      public function transform($attr, $config, $context) {
  22  
  23          if (!isset($attr[$this->attr])) return $attr;
  24  
  25          $width = $this->confiscateAttr($attr, $this->attr);
  26          // some validation could happen here
  27  
  28          if (!isset($this->css[$this->attr])) return $attr;
  29  
  30          $style = '';
  31          foreach ($this->css[$this->attr] as $suffix) {
  32              $property = "margin-$suffix";
  33              $style .= "$property:{$width}px;";
  34          }
  35  
  36          $this->prependCSS($attr, $style);
  37  
  38          return $attr;
  39  
  40      }
  41  
  42  }
  43  
  44  // vim: et sw=4 sts=4