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   1  <?php
   2  
   3  /**
   4   * Takes the contents of blockquote when in strict and reformats for validation.
   5   */
   6  class HTMLPurifier_ChildDef_StrictBlockquote extends HTMLPurifier_ChildDef_Required
   7  {
   8      protected $real_elements;
   9      protected $fake_elements;
  10      public $allow_empty = true;
  11      public $type = 'strictblockquote';
  12      protected $init = false;
  13  
  14      /**
  15       * @note We don't want MakeWellFormed to auto-close inline elements since
  16       *       they might be allowed.
  17       */
  18      public function getAllowedElements($config) {
  19          $this->init($config);
  20          return $this->fake_elements;
  21      }
  22  
  23      public function validateChildren($tokens_of_children, $config, $context) {
  24  
  25          $this->init($config);
  26  
  27          // trick the parent class into thinking it allows more
  28          $this->elements = $this->fake_elements;
  29          $result = parent::validateChildren($tokens_of_children, $config, $context);
  30          $this->elements = $this->real_elements;
  31  
  32          if ($result === false) return array();
  33          if ($result === true) $result = $tokens_of_children;
  34  
  35          $def = $config->getHTMLDefinition();
  36          $block_wrap_start = new HTMLPurifier_Token_Start($def->info_block_wrapper);
  37          $block_wrap_end   = new HTMLPurifier_Token_End(  $def->info_block_wrapper);
  38          $is_inline = false;
  39          $depth = 0;
  40          $ret = array();
  41  
  42          // assuming that there are no comment tokens
  43          foreach ($result as $i => $token) {
  44              $token = $result[$i];
  45              // ifs are nested for readability
  46              if (!$is_inline) {
  47                  if (!$depth) {
  48                       if (
  49                          ($token instanceof HTMLPurifier_Token_Text && !$token->is_whitespace) ||
  50                          (!$token instanceof HTMLPurifier_Token_Text && !isset($this->elements[$token->name]))
  51                       ) {
  52                          $is_inline = true;
  53                          $ret[] = $block_wrap_start;
  54                       }
  55                  }
  56              } else {
  57                  if (!$depth) {
  58                      // starting tokens have been inline text / empty
  59                      if ($token instanceof HTMLPurifier_Token_Start || $token instanceof HTMLPurifier_Token_Empty) {
  60                          if (isset($this->elements[$token->name])) {
  61                              // ended
  62                              $ret[] = $block_wrap_end;
  63                              $is_inline = false;
  64                          }
  65                      }
  66                  }
  67              }
  68              $ret[] = $token;
  69              if ($token instanceof HTMLPurifier_Token_Start) $depth++;
  70              if ($token instanceof HTMLPurifier_Token_End)   $depth--;
  71          }
  72          if ($is_inline) $ret[] = $block_wrap_end;
  73          return $ret;
  74      }
  75  
  76      private function init($config) {
  77          if (!$this->init) {
  78              $def = $config->getHTMLDefinition();
  79              // allow all inline elements
  80              $this->real_elements = $this->elements;
  81              $this->fake_elements = $def->info_content_sets['Flow'];
  82              $this->fake_elements['#PCDATA'] = true;
  83              $this->init = true;
  84          }
  85      }
  86  }
  87  
  88  // vim: et sw=4 sts=4