library/HTMLPurifier/AttrDef/Switch.php

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<?php

class HTMLPurifier_AttrDef_Switch
{
    
    protected $tag;
    protected $withTag, $withoutTag;
    
    public function __construct($tag, $with_tag, $without_tag) {
        $this->tag = $tag;
        $this->withTag = $with_tag;
        $this->withoutTag = $without_tag;
    }
    
    public function validate($string, $config, $context) {
        $token = $context->get('CurrentToken', true);
        if (!$token || $token->name !== $this->tag) {
            return $this->withoutTag->validate($string, $config, $context);
        } else {
            return $this->withTag->validate($string, $config, $context);
        }
    }
    
}

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