vendor/ezyang/htmlpurifier/library/HTMLPurifier/Injector/SafeObject.php

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<?php

/**
 * Adds important param elements to inside of object in order to make
 * things safe.
 */
class HTMLPurifier_Injector_SafeObject extends HTMLPurifier_Injector
{
    /**
     * @type string
     */
    public $name = 'SafeObject';

    /**
     * @type array
     */
    public $needed = array('object', 'param');

    /**
     * @type array
     */
    protected $objectStack = array();

    /**
     * @type array
     */
    protected $paramStack = array();

    /**
     * Keep this synchronized with AttrTransform/SafeParam.php.
     * @type array
     */
    protected $addParam = array(
        'allowScriptAccess' => 'never',
        'allowNetworking' => 'internal',
    );

    /**
     * These are all lower-case keys.
     * @type array
     */
    protected $allowedParam = array(
        'wmode' => true,
        'movie' => true,
        'flashvars' => true,
        'src' => true,
        'allowfullscreen' => true, // if omitted, assume to be 'false'
    );

    /**
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return void
     */
    public function prepare($config, $context)
    {
        parent::prepare($config, $context);
    }

    /**