diff options
author | Andrew Dolgov <[email protected]> | 2012-06-05 21:52:21 +0400 |
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committer | Andrew Dolgov <[email protected]> | 2012-06-05 21:52:21 +0400 |
commit | 010efc9b814b433bc60353caec185d905688a32b (patch) | |
tree | b2b4f62cbc2d10cf75386e992434be1f4013dc13 /lib/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php | |
parent | 705b97b7fca9ea70820af5fcd926f88903eaa430 (diff) |
Revert "remove htmlpurifier"
This reverts commit c21a462d52bd32737c32c29b060da03b38f1c2e6.
Diffstat (limited to 'lib/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php')
-rw-r--r-- | lib/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php b/lib/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php new file mode 100644 index 000000000..b68047b4b --- /dev/null +++ b/lib/htmlpurifier/library/HTMLPurifier/ChildDef/Custom.php @@ -0,0 +1,90 @@ +<?php + +/** + * Custom validation class, accepts DTD child definitions + * + * @warning Currently this class is an all or nothing proposition, that is, + * it will only give a bool return value. + */ +class HTMLPurifier_ChildDef_Custom extends HTMLPurifier_ChildDef +{ + public $type = 'custom'; + public $allow_empty = false; + /** + * Allowed child pattern as defined by the DTD + */ + public $dtd_regex; + /** + * PCRE regex derived from $dtd_regex + * @private + */ + private $_pcre_regex; + /** + * @param $dtd_regex Allowed child pattern from the DTD + */ + public function __construct($dtd_regex) { + $this->dtd_regex = $dtd_regex; + $this->_compileRegex(); + } + /** + * Compiles the PCRE regex from a DTD regex ($dtd_regex to $_pcre_regex) + */ + protected function _compileRegex() { + $raw = str_replace(' ', '', $this->dtd_regex); + if ($raw{0} != '(') { + $raw = "($raw)"; + } + $el = '[#a-zA-Z0-9_.-]+'; + $reg = $raw; + + // COMPLICATED! AND MIGHT BE BUGGY! I HAVE NO CLUE WHAT I'M + // DOING! Seriously: if there's problems, please report them. + + // collect all elements into the $elements array + preg_match_all("/$el/", $reg, $matches); + foreach ($matches[0] as $match) { + $this->elements[$match] = true; + } + + // setup all elements as parentheticals with leading commas + $reg = preg_replace("/$el/", '(,\\0)', $reg); + + // remove commas when they were not solicited + $reg = preg_replace("/([^,(|]\(+),/", '\\1', $reg); + + // remove all non-paranthetical commas: they are handled by first regex + $reg = preg_replace("/,\(/", '(', $reg); + + $this->_pcre_regex = $reg; + } + public function validateChildren($tokens_of_children, $config, $context) { + $list_of_children = ''; + $nesting = 0; // depth into the nest + foreach ($tokens_of_children as $token) { + if (!empty($token->is_whitespace)) continue; + + $is_child = ($nesting == 0); // direct + + if ($token instanceof HTMLPurifier_Token_Start) { + $nesting++; + } elseif ($token instanceof HTMLPurifier_Token_End) { + $nesting--; + } + + if ($is_child) { + $list_of_children .= $token->name . ','; + } + } + // add leading comma to deal with stray comma declarations + $list_of_children = ',' . rtrim($list_of_children, ','); + $okay = + preg_match( + '/^,?'.$this->_pcre_regex.'$/', + $list_of_children + ); + + return (bool) $okay; + } +} + +// vim: et sw=4 sts=4 |