File indexing completed on 2024-05-26 06:02:31

 <?php
 
 /**
  * Validates shorthand CSS property background.
  * @warning Does not support url tokens that have internal spaces.
  */
 class HTMLPurifier_AttrDef_CSS_Background extends HTMLPurifier_AttrDef
 {
 
     /**
      * Local copy of component validators.
      * @type HTMLPurifier_AttrDef[]
      * @note See HTMLPurifier_AttrDef_Font::$info for a similar impl.
      */
     protected $info;
 
     /**
      * @param HTMLPurifier_Config $config
      */
     public function __construct($config)
     {
         $def = $config->getCSSDefinition();
         $this->info['background-color'] = $def->info['background-color'];
         $this->info['background-image'] = $def->info['background-image'];
         $this->info['background-repeat'] = $def->info['background-repeat'];
         $this->info['background-attachment'] = $def->info['background-attachment'];
         $this->info['background-position'] = $def->info['background-position'];
     }
 
     /**
      * @param string $string
      * @param HTMLPurifier_Config $config
      * @param HTMLPurifier_Context $context
      * @return bool|string
      */
     public function validate($string, $config, $context)
     {
         // regular pre-processing
         $string = $this->parseCDATA($string);
         if ($string === '') {
             return false;
         }
 
         // munge rgb() decl if necessary
         $string = $this->mungeRgb($string);
 
         // assumes URI doesn't have spaces in it
         $bits = explode(' ', $string); // bits to process
 
         $caught = array();
         $caught['color'] = false;
         $caught['image'] = false;
         $caught['repeat'] = false;
         $caught['attachment'] = false;
         $caught['position'] = false;
 
         $i = 0; // number of catches
 
         foreach ($bits as $bit) {
             if ($bit === '') {
                 continue;
             }
             foreach ($caught as $key => $status) {
                 if ($key != 'position') {
                     if ($status !== false) {
                         continue;
                     }
                     $r = $this->info['background-' . $key]->validate($bit, $config, $context);
                 } else {
                     $r = $bit;
                 }
                 if ($r === false) {
                     continue;
                 }
                 if ($key == 'position') {
                     if ($caught[$key] === false) {
                         $caught[$key] = '';
                     }
                     $caught[$key] .= $r . ' ';
                 } else {
                     $caught[$key] = $r;
                 }
                 $i++;
                 break;
             }
         }
 
         if (!$i) {
             return false;
         }
         if ($caught['position'] !== false) {
             $caught['position'] = $this->info['background-position']->
                 validate($caught['position'], $config, $context);
         }
 
         $ret = array();
         foreach ($caught as $value) {
             if ($value === false) {
                 continue;
             }
             $ret[] = $value;
         }
 
         if (empty($ret)) {
             return false;
         }
         return implode(' ', $ret);
     }
 }
 
 // vim: et sw=4 sts=4