[Summary view] [Print] [Text view]

   1  <?php
   2  
   3  class HTMLPurifier_Injector_RemoveEmpty extends HTMLPurifier_Injector
   4  {
   5      /**
   6       * @type HTMLPurifier_Context
   7       */
   8      private $context;
   9  
  10      /**
  11       * @type HTMLPurifier_Config
  12       */
  13      private $config;
  14  
  15      /**
  16       * @type HTMLPurifier_AttrValidator
  17       */
  18      private $attrValidator;
  19  
  20      /**
  21       * @type bool
  22       */
  23      private $removeNbsp;
  24  
  25      /**
  26       * @type bool
  27       */
  28      private $removeNbspExceptions;
  29  
  30      /**
  31       * Cached contents of %AutoFormat.RemoveEmpty.Predicate
  32       * @type array
  33       */
  34      private $exclude;
  35  
  36      /**
  37       * @param HTMLPurifier_Config $config
  38       * @param HTMLPurifier_Context $context
  39       * @return void
  40       */
  41      public function prepare($config, $context)
  42      {
  43          parent::prepare($config, $context);
  44          $this->config = $config;
  45          $this->context = $context;
  46          $this->removeNbsp = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp');
  47          $this->removeNbspExceptions = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions');
  48          $this->exclude = $config->get('AutoFormat.RemoveEmpty.Predicate');
  49          $this->attrValidator = new HTMLPurifier_AttrValidator();
  50      }
  51  
  52      /**
  53       * @param HTMLPurifier_Token $token
  54       */
  55      public function handleElement(&$token)
  56      {
  57          if (!$token instanceof HTMLPurifier_Token_Start) {
  58              return;
  59          }
  60          $next = false;
  61          $deleted = 1; // the current tag
  62          for ($i = count($this->inputZipper->back) - 1; $i >= 0; $i--, $deleted++) {
  63              $next = $this->inputZipper->back[$i];
  64              if ($next instanceof HTMLPurifier_Token_Text) {
  65                  if ($next->is_whitespace) {
  66                      continue;
  67                  }
  68                  if ($this->removeNbsp && !isset($this->removeNbspExceptions[$token->name])) {
  69                      $plain = str_replace("\xC2\xA0", "", $next->data);
  70                      $isWsOrNbsp = $plain === '' || ctype_space($plain);
  71                      if ($isWsOrNbsp) {
  72                          continue;
  73                      }
  74                  }
  75              }
  76              break;
  77          }
  78          if (!$next || ($next instanceof HTMLPurifier_Token_End && $next->name == $token->name)) {
  79              $this->attrValidator->validateToken($token, $this->config, $this->context);
  80              $token->armor['ValidateAttributes'] = true;
  81              if (isset($this->exclude[$token->name])) {
  82                  $r = true;
  83                  foreach ($this->exclude[$token->name] as $elem) {
  84                      if (!isset($token->attr[$elem])) $r = false;
  85                  }
  86                  if ($r) return;
  87              }
  88              if (isset($token->attr['id']) || isset($token->attr['name'])) {
  89                  return;
  90              }
  91              $token = $deleted + 1;
  92              for ($b = 0, $c = count($this->inputZipper->front); $b < $c; $b++) {
  93                  $prev = $this->inputZipper->front[$b];
  94                  if ($prev instanceof HTMLPurifier_Token_Text && $prev->is_whitespace) {
  95                      continue;
  96                  }
  97                  break;
  98              }
  99              // This is safe because we removed the token that triggered this.
 100              $this->rewindOffset($b+$deleted);
 101              return;
 102          }
 103      }
 104  }
 105  
 106  // vim: et sw=4 sts=4