library/HTMLPurifier/ChildDef/StrictBlockquote.php

   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