File indexing completed on 2024-05-12 06:02:05

 <?php
 
 class HTMLPurifier_Injector_RemoveEmpty extends HTMLPurifier_Injector
 {
     /**
      * @type HTMLPurifier_Context
      */
     private $context;
 
     /**
      * @type HTMLPurifier_Config
      */
     private $config;
 
     /**
      * @type HTMLPurifier_AttrValidator
      */
     private $attrValidator;
 
     /**
      * @type bool
      */
     private $removeNbsp;
 
     /**
      * @type bool
      */
     private $removeNbspExceptions;
 
     /**
      * Cached contents of %AutoFormat.RemoveEmpty.Predicate
      * @type array
      */
     private $exclude;
 
     /**
      * @param HTMLPurifier_Config $config
      * @param HTMLPurifier_Context $context
      * @return void
      */
     public function prepare($config, $context)
     {
         parent::prepare($config, $context);
         $this->config = $config;
         $this->context = $context;
         $this->removeNbsp = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp');
         $this->removeNbspExceptions = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions');
         $this->exclude = $config->get('AutoFormat.RemoveEmpty.Predicate');
         foreach ($this->exclude as $key => $attrs) {
             if (!is_array($attrs)) {
                 // HACK, see HTMLPurifier/Printer/ConfigForm.php
                 $this->exclude[$key] = explode(';', $attrs);
             }
         }
         $this->attrValidator = new HTMLPurifier_AttrValidator();
     }
 
     /**
      * @param HTMLPurifier_Token $token
      */
     public function handleElement(&$token)
     {
         if (!$token instanceof HTMLPurifier_Token_Start) {
             return;
         }
         $next = false;
         $deleted = 1; // the current tag
         for ($i = count($this->inputZipper->back) - 1; $i >= 0; $i--, $deleted++) {
             $next = $this->inputZipper->back[$i];
             if ($next instanceof HTMLPurifier_Token_Text) {
                 if ($next->is_whitespace) {
                     continue;
                 }
                 if ($this->removeNbsp && !isset($this->removeNbspExceptions[$token->name])) {
                     $plain = str_replace("\xC2\xA0", "", $next->data);
                     $isWsOrNbsp = $plain === '' || ctype_space($plain);
                     if ($isWsOrNbsp) {
                         continue;
                     }
                 }
             }
             break;
         }
         if (!$next || ($next instanceof HTMLPurifier_Token_End && $next->name == $token->name)) {
             $this->attrValidator->validateToken($token, $this->config, $this->context);
             $token->armor['ValidateAttributes'] = true;
             if (isset($this->exclude[$token->name])) {
                 $r = true;
                 foreach ($this->exclude[$token->name] as $elem) {
                     if (!isset($token->attr[$elem])) $r = false;
                 }
                 if ($r) return;
             }
             if (isset($token->attr['id']) || isset($token->attr['name'])) {
                 return;
             }
             $token = $deleted + 1;
             for ($b = 0, $c = count($this->inputZipper->front); $b < $c; $b++) {
                 $prev = $this->inputZipper->front[$b];
                 if ($prev instanceof HTMLPurifier_Token_Text && $prev->is_whitespace) {
                     continue;
                 }
                 break;
             }
             // This is safe because we removed the token that triggered this.
             $this->rewindOffset($b+$deleted);
             return;
         }
     }
 }
 
 // vim: et sw=4 sts=4