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https://github.com/renbaoshuo/S2OJ.git
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46 lines
1.2 KiB
PHP
46 lines
1.2 KiB
PHP
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<?php
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/**
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* Definition that allows a set of elements, and allows no children.
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* @note This is a hack to reuse code from HTMLPurifier_ChildDef_Required,
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* really, one shouldn't inherit from the other. Only altered behavior
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* is to overload a returned false with an array. Thus, it will never
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* return false.
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*/
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class HTMLPurifier_ChildDef_Optional extends HTMLPurifier_ChildDef_Required
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{
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/**
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* @type bool
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*/
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public $allow_empty = true;
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/**
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* @type string
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*/
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public $type = 'optional';
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/**
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* @param array $children
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* @param HTMLPurifier_Config $config
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* @param HTMLPurifier_Context $context
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* @return array
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*/
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public function validateChildren($children, $config, $context)
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{
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$result = parent::validateChildren($children, $config, $context);
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// we assume that $children is not modified
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if ($result === false) {
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if (empty($children)) {
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return true;
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} elseif ($this->whitespace) {
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return $children;
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} else {
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return array();
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}
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}
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return $result;
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}
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}
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// vim: et sw=4 sts=4
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