lib/htmlpurifier/HTMLPurifier/AttrTransform/EnumToCSS.php

   1 <?php
   2
   3 require_once 'HTMLPurifier/AttrTransform.php';
   4
   5 /**
   6  * Generic pre-transform that converts an attribute with a fixed number of
   7  * values (enumerated) to CSS.
   8  */
   9 class HTMLPurifier_AttrTransform_EnumToCSS extends HTMLPurifier_AttrTransform {
  10
  11     /**
  12      * Name of attribute to transform from
  13      */
  14     var $attr;
  15
  16     /**
  17      * Lookup array of attribute values to CSS
  18      */
  19     var $enumToCSS = array();
  20
  21     /**
  22      * Case sensitivity of the matching
  23      * @warning Currently can only be guaranteed to work with ASCII
  24      *          values.
  25      */
  26     var $caseSensitive = false;
  27
  28     /**
  29      * @param $attr String attribute name to transform from
  30      * @param $enumToCSS Lookup array of attribute values to CSS
  31      * @param $case_sensitive Boolean case sensitivity indicator, default false
  32      */
  33     function HTMLPurifier_AttrTransform_EnumToCSS($attr, $enum_to_css, $case_sensitive = false) {
  34         $this->attr = $attr;
  35         $this->enumToCSS = $enum_to_css;
  36         $this->caseSensitive = (bool) $case_sensitive;
  37     }
  38
  39     function transform($attr, $config, &$context) {
  40
  41         if (!isset($attr[$this->attr])) return $attr;
  42
  43         $value = trim($attr[$this->attr]);
  44         unset($attr[$this->attr]);
  45
  46         if (!$this->caseSensitive) $value = strtolower($value);
  47
  48         if (!isset($this->enumToCSS[$value])) {
  49             return $attr;
  50         }
  51
  52         $this->prependCSS($attr, $this->enumToCSS[$value]);
  53
  54         return $attr;
  55
  56     }
  57
  58 }
  59