library/HTMLPurifier/AttrTransform/EnumToCSS.php

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