diff options
Diffstat (limited to 'library/HTMLPurifier/EntityParser.php')
| -rw-r--r-- | library/HTMLPurifier/EntityParser.php | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/library/HTMLPurifier/EntityParser.php b/library/HTMLPurifier/EntityParser.php deleted file mode 100644 index 61529dcd9..000000000 --- a/library/HTMLPurifier/EntityParser.php +++ /dev/null @@ -1,153 +0,0 @@ -<?php - -// if want to implement error collecting here, we'll need to use some sort -// of global data (probably trigger_error) because it's impossible to pass -// $config or $context to the callback functions. - -/** - * Handles referencing and derefencing character entities - */ -class HTMLPurifier_EntityParser -{ - - /** - * Reference to entity lookup table. - * @type HTMLPurifier_EntityLookup - */ - protected $_entity_lookup; - - /** - * Callback regex string for parsing entities. - * @type string - */ - protected $_substituteEntitiesRegex = - '/&(?:[#]x([a-fA-F0-9]+)|[#]0*(\d+)|([A-Za-z_:][A-Za-z0-9.\-_:]*));?/'; - // 1. hex 2. dec 3. string (XML style) - - /** - * Decimal to parsed string conversion table for special entities. - * @type array - */ - protected $_special_dec2str = - array( - 34 => '"', - 38 => '&', - 39 => "'", - 60 => '<', - 62 => '>' - ); - - /** - * Stripped entity names to decimal conversion table for special entities. - * @type array - */ - protected $_special_ent2dec = - array( - 'quot' => 34, - 'amp' => 38, - 'lt' => 60, - 'gt' => 62 - ); - - /** - * Substitutes non-special entities with their parsed equivalents. Since - * running this whenever you have parsed character is t3h 5uck, we run - * it before everything else. - * - * @param string $string String to have non-special entities parsed. - * @return string Parsed string. - */ - public function substituteNonSpecialEntities($string) - { - // it will try to detect missing semicolons, but don't rely on it - return preg_replace_callback( - $this->_substituteEntitiesRegex, - array($this, 'nonSpecialEntityCallback'), - $string - ); - } - - /** - * Callback function for substituteNonSpecialEntities() that does the work. - * - * @param array $matches PCRE matches array, with 0 the entire match, and - * either index 1, 2 or 3 set with a hex value, dec value, - * or string (respectively). - * @return string Replacement string. - */ - - protected function nonSpecialEntityCallback($matches) - { - // replaces all but big five - $entity = $matches[0]; - $is_num = (@$matches[0][1] === '#'); - if ($is_num) { - $is_hex = (@$entity[2] === 'x'); - $code = $is_hex ? hexdec($matches[1]) : (int) $matches[2]; - // abort for special characters - if (isset($this->_special_dec2str[$code])) { - return $entity; - } - return HTMLPurifier_Encoder::unichr($code); - } else { - if (isset($this->_special_ent2dec[$matches[3]])) { - return $entity; - } - if (!$this->_entity_lookup) { - $this->_entity_lookup = HTMLPurifier_EntityLookup::instance(); - } - if (isset($this->_entity_lookup->table[$matches[3]])) { - return $this->_entity_lookup->table[$matches[3]]; - } else { - return $entity; - } - } - } - - /** - * Substitutes only special entities with their parsed equivalents. - * - * @notice We try to avoid calling this function because otherwise, it - * would have to be called a lot (for every parsed section). - * - * @param string $string String to have non-special entities parsed. - * @return string Parsed string. - */ - public function substituteSpecialEntities($string) - { - return preg_replace_callback( - $this->_substituteEntitiesRegex, - array($this, 'specialEntityCallback'), - $string - ); - } - - /** - * Callback function for substituteSpecialEntities() that does the work. - * - * This callback has same syntax as nonSpecialEntityCallback(). - * - * @param array $matches PCRE-style matches array, with 0 the entire match, and - * either index 1, 2 or 3 set with a hex value, dec value, - * or string (respectively). - * @return string Replacement string. - */ - protected function specialEntityCallback($matches) - { - $entity = $matches[0]; - $is_num = (@$matches[0][1] === '#'); - if ($is_num) { - $is_hex = (@$entity[2] === 'x'); - $int = $is_hex ? hexdec($matches[1]) : (int) $matches[2]; - return isset($this->_special_dec2str[$int]) ? - $this->_special_dec2str[$int] : - $entity; - } else { - return isset($this->_special_ent2dec[$matches[3]]) ? - $this->_special_ent2dec[$matches[3]] : - $entity; - } - } -} - -// vim: et sw=4 sts=4 |