htmlpurifier/library/HTMLPurifier/HTMLModule/Scripting.php

<?php

/*

WARNING: THIS MODULE IS EXTREMELY DANGEROUS AS IT ENABLES INLINE SCRIPTING
INSIDE HTML PURIFIER DOCUMENTS. USE ONLY WITH TRUSTED USER INPUT!!!

*/

/**
 * Implements required attribute stipulation for <script>
 */
class HTMLPurifier_AttrTransform_ScriptRequired extends HTMLPurifier_AttrTransform
{
    public function transform($attr, $config, $context) {
        if (!isset($attr['type'])) {
            $attr['type'] = 'text/javascript';
        }
        return $attr;
    }
}

/**
 * XHTML 1.1 Scripting module, defines elements that are used to contain
 * information pertaining to executable scripts or the lack of support
 * for executable scripts.
 * @note This module does not contain inline scripting elements
 */
class HTMLPurifier_HTMLModule_Scripting extends HTMLPurifier_HTMLModule
{
    public $name = 'Scripting';
    public $elements = array('script', 'noscript');
    public $content_sets = array('Block' => 'script | noscript', 'Inline' => 'script | noscript');
    public $safe = false;
    
    public function __construct() {
        // TODO: create custom child-definition for noscript that
        // auto-wraps stray #PCDATA in a similar manner to 
        // blockquote's custom definition (we would use it but
        // blockquote's contents are optional while noscript's contents
        // are required)
        
        // TODO: convert this to new syntax, main problem is getting
        // both content sets working
        
        // In theory, this could be safe, but I don't see any reason to
        // allow it.
        $this->info['noscript'] = new HTMLPurifier_ElementDef();
        $this->info['noscript']->attr = array( 0 => array('Common') );
        $this->info['noscript']->content_model = 'Heading | List | Block';
        $this->info['noscript']->content_model_type = 'required';
        
        $this->info['script'] = new HTMLPurifier_ElementDef();
        $this->info['script']->attr = array(
            'defer' => new HTMLPurifier_AttrDef_Enum(array('defer')),
            'src'   => new HTMLPurifier_AttrDef_URI(true),
            'type'  => new HTMLPurifier_AttrDef_Enum(array('text/javascript'))
        );
        $this->info['script']->content_model = '#PCDATA';
        $this->info['script']->content_model_type = 'optional';
        $this->info['script']->attr_transform_pre['type'] =
        $this->info['script']->attr_transform_post['type'] =
            new HTMLPurifier_AttrTransform_ScriptRequired();
    }
}