inc/3rdparty/htmlpurifier/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php

   1 <?php
   2
   3 /**
   4  * Decorator which enables !important to be used in CSS values.
   5  */
   6 class HTMLPurifier_AttrDef_CSS_ImportantDecorator extends HTMLPurifier_AttrDef
   7 {
   8     /**
   9      * @type HTMLPurifier_AttrDef
  10      */
  11     public $def;
  12     /**
  13      * @type bool
  14      */
  15     public $allow;
  16
  17     /**
  18      * @param HTMLPurifier_AttrDef $def Definition to wrap
  19      * @param bool $allow Whether or not to allow !important
  20      */
  21     public function __construct($def, $allow = false)
  22     {
  23         $this->def = $def;
  24         $this->allow = $allow;
  25     }
  26
  27     /**
  28      * Intercepts and removes !important if necessary
  29      * @param string $string
  30      * @param HTMLPurifier_Config $config
  31      * @param HTMLPurifier_Context $context
  32      * @return bool|string
  33      */
  34     public function validate($string, $config, $context)
  35     {
  36         // test for ! and important tokens
  37         $string = trim($string);
  38         $is_important = false;
  39         // :TODO: optimization: test directly for !important and ! important
  40         if (strlen($string) >= 9 && substr($string, -9) === 'important') {
  41             $temp = rtrim(substr($string, 0, -9));
  42             // use a temp, because we might want to restore important
  43             if (strlen($temp) >= 1 && substr($temp, -1) === '!') {
  44                 $string = rtrim(substr($temp, 0, -1));
  45                 $is_important = true;
  46             }
  47         }
  48         $string = $this->def->validate($string, $config, $context);
  49         if ($this->allow && $is_important) {
  50             $string .= ' !important';
  51         }
  52         return $string;
  53     }
  54 }
  55
  56 // vim: et sw=4 sts=4