library/HTMLPurifier/AttrDef/CSS/Length.php

   1 <?php
   2
   3 /**
   4  * Represents a Length as defined by CSS.
   5  */
   6 class HTMLPurifier_AttrDef_CSS_Length extends HTMLPurifier_AttrDef
   7 {
   8
   9     /**
  10      * @type HTMLPurifier_Length|string
  11      */
  12     protected $min;
  13
  14     /**
  15      * @type HTMLPurifier_Length|string
  16      */
  17     protected $max;
  18
  19     /**
  20      * @param HTMLPurifier_Length|string $min Minimum length, or null for no bound. String is also acceptable.
  21      * @param HTMLPurifier_Length|string $max Maximum length, or null for no bound. String is also acceptable.
  22      */
  23     public function __construct($min = null, $max = null)
  24     {
  25         $this->min = $min !== null ? HTMLPurifier_Length::make($min) : null;
  26         $this->max = $max !== null ? HTMLPurifier_Length::make($max) : null;
  27     }
  28
  29     /**
  30      * @param string $string
  31      * @param HTMLPurifier_Config $config
  32      * @param HTMLPurifier_Context $context
  33      * @return bool|string
  34      */
  35     public function validate($string, $config, $context)
  36     {
  37         $string = $this->parseCDATA($string);
  38
  39         // Optimizations
  40         if ($string === '') {
  41             return false;
  42         }
  43         if ($string === '0') {
  44             return '0';
  45         }
  46         if (strlen($string) === 1) {
  47             return false;
  48         }
  49
  50         $length = HTMLPurifier_Length::make($string);
  51         if (!$length->isValid()) {
  52             return false;
  53         }
  54
  55         if ($this->min) {
  56             $c = $length->compareTo($this->min);
  57             if ($c === false) {
  58                 return false;
  59             }
  60             if ($c < 0) {
  61                 return false;
  62             }
  63         }
  64         if ($this->max) {
  65             $c = $length->compareTo($this->max);
  66             if ($c === false) {
  67                 return false;
  68             }
  69             if ($c > 0) {
  70                 return false;
  71             }
  72         }
  73         return $length->toString();
  74     }
  75 }
  76
  77 // vim: et sw=4 sts=4