library/HTMLPurifier/Injector/RemoveEmpty.php

   1 <?php
   2
   3 class HTMLPurifier_Injector_RemoveEmpty extends HTMLPurifier_Injector
   4 {
   5
   6     private $context, $config, $attrValidator, $removeNbsp, $removeNbspExceptions;
   7
   8     public function prepare($config, $context) {
   9         parent::prepare($config, $context);
  10         $this->config = $config;
  11         $this->context = $context;
  12         $this->removeNbsp = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp');
  13         $this->removeNbspExceptions = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions');
  14         $this->attrValidator = new HTMLPurifier_AttrValidator();
  15     }
  16
  17     public function handleElement(&$token) {
  18         if (!$token instanceof HTMLPurifier_Token_Start) return;
  19         $next = false;
  20         for ($i = $this->inputIndex + 1, $c = count($this->inputTokens); $i < $c; $i++) {
  21             $next = $this->inputTokens[$i];
  22             if ($next instanceof HTMLPurifier_Token_Text) {
  23                 if ($next->is_whitespace) continue;
  24                 if ($this->removeNbsp && !isset($this->removeNbspExceptions[$token->name])) {
  25                     $plain = str_replace("\xC2\xA0", "", $next->data);
  26                     $isWsOrNbsp = $plain === '' || ctype_space($plain);
  27                     if ($isWsOrNbsp) continue;
  28                 }
  29             }
  30             break;
  31         }
  32         if (!$next || ($next instanceof HTMLPurifier_Token_End && $next->name == $token->name)) {
  33             if ($token->name == 'colgroup') return;
  34             $this->attrValidator->validateToken($token, $this->config, $this->context);
  35             $token->armor['ValidateAttributes'] = true;
  36             if (isset($token->attr['id']) || isset($token->attr['name'])) return;
  37             $token = $i - $this->inputIndex + 1;
  38             for ($b = $this->inputIndex - 1; $b > 0; $b--) {
  39                 $prev = $this->inputTokens[$b];
  40                 if ($prev instanceof HTMLPurifier_Token_Text && $prev->is_whitespace) continue;
  41                 break;
  42             }
  43             // This is safe because we removed the token that triggered this.
  44             $this->rewind($b - 1);
  45             return;
  46         }
  47     }
  48
  49 }
  50
  51 // vim: et sw=4 sts=4