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be7f6d4834
Prior to this change, all the line endings in the imported HTMLPurifier library were using CRLF (\r\n aka Windows style), but the HTMLPurifier source and also the downloadable artefacts use LF (\n aka Linux style) as line endings. This has been the case since 510d190382003985eafd6f4407190d43509016a5 when with the commit "MDL-38672 import HTML Purifier 4.5.0" all line endings were changed from LF to CRLF. There was no comment in the commit on why this change was done. As the original source uses LF, this commit partly reverts 510d190382003985eafd6f4407190d43509016a5 and goes back to LF as line endings. Signed-off-by: Daniel Ziegenberg <daniel@ziegenberg.at>
103 lines
2.7 KiB
PHP
103 lines
2.7 KiB
PHP
<?php
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/**
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* Custom validation class, accepts DTD child definitions
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*
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* @warning Currently this class is an all or nothing proposition, that is,
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* it will only give a bool return value.
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*/
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class HTMLPurifier_ChildDef_Custom extends HTMLPurifier_ChildDef
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{
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/**
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* @type string
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*/
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public $type = 'custom';
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/**
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* @type bool
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*/
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public $allow_empty = false;
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/**
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* Allowed child pattern as defined by the DTD.
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* @type string
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*/
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public $dtd_regex;
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/**
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* PCRE regex derived from $dtd_regex.
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* @type string
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*/
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private $_pcre_regex;
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/**
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* @param $dtd_regex Allowed child pattern from the DTD
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*/
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public function __construct($dtd_regex)
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{
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$this->dtd_regex = $dtd_regex;
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$this->_compileRegex();
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}
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/**
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* Compiles the PCRE regex from a DTD regex ($dtd_regex to $_pcre_regex)
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*/
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protected function _compileRegex()
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{
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$raw = str_replace(' ', '', $this->dtd_regex);
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if ($raw[0] != '(') {
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$raw = "($raw)";
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}
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$el = '[#a-zA-Z0-9_.-]+';
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$reg = $raw;
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// COMPLICATED! AND MIGHT BE BUGGY! I HAVE NO CLUE WHAT I'M
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// DOING! Seriously: if there's problems, please report them.
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// collect all elements into the $elements array
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preg_match_all("/$el/", $reg, $matches);
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foreach ($matches[0] as $match) {
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$this->elements[$match] = true;
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}
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// setup all elements as parentheticals with leading commas
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$reg = preg_replace("/$el/", '(,\\0)', $reg);
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// remove commas when they were not solicited
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$reg = preg_replace("/([^,(|]\(+),/", '\\1', $reg);
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// remove all non-paranthetical commas: they are handled by first regex
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$reg = preg_replace("/,\(/", '(', $reg);
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$this->_pcre_regex = $reg;
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}
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/**
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* @param HTMLPurifier_Node[] $children
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* @param HTMLPurifier_Config $config
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* @param HTMLPurifier_Context $context
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* @return bool
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*/
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public function validateChildren($children, $config, $context)
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{
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$list_of_children = '';
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$nesting = 0; // depth into the nest
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foreach ($children as $node) {
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if (!empty($node->is_whitespace)) {
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continue;
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}
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$list_of_children .= $node->name . ',';
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}
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// add leading comma to deal with stray comma declarations
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$list_of_children = ',' . rtrim($list_of_children, ',');
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$okay =
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preg_match(
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'/^,?' . $this->_pcre_regex . '$/',
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$list_of_children
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);
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return (bool)$okay;
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}
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}
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// vim: et sw=4 sts=4
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