library/HTMLPurifier/AttrTransform/ImgSpace.php

   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     /**
   9      * @type string
  10      */
  11     protected $attr;
  12
  13     /**
  14      * @type array
  15      */
  16     protected $css = array(
  17         'hspace' => array('left', 'right'),
  18         'vspace' => array('top', 'bottom')
  19     );
  20
  21     /**
  22      * @param string $attr
  23      */
  24     public function __construct($attr)
  25     {
  26         $this->attr = $attr;
  27         if (!isset($this->css[$attr])) {
  28             trigger_error(htmlspecialchars($attr) . ' is not valid space attribute');
  29         }
  30     }
  31
  32     /**
  33      * @param array $attr
  34      * @param HTMLPurifier_Config $config
  35      * @param HTMLPurifier_Context $context
  36      * @return array
  37      */
  38     public function transform($attr, $config, $context)
  39     {
  40         if (!isset($attr[$this->attr])) {
  41             return $attr;
  42         }
  43
  44         $width = $this->confiscateAttr($attr, $this->attr);
  45         // some validation could happen here
  46
  47         if (!isset($this->css[$this->attr])) {
  48             return $attr;
  49         }
  50
  51         $style = '';
  52         foreach ($this->css[$this->attr] as $suffix) {
  53             $property = "margin-$suffix";
  54             $style .= "$property:{$width}px;";
  55         }
  56         $this->prependCSS($attr, $style);
  57         return $attr;
  58     }
  59 }
  60
  61 // vim: et sw=4 sts=4