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1 efrain 1 
<?php
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/**
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 * Special-case enum attribute definition that lazy loads allowed frame targets
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 */
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class HTMLPurifier_AttrDef_HTML_FrameTarget extends HTMLPurifier_AttrDef_Enum
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{
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    /**
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     * @type array
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     */
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    public $valid_values = false; // uninitialized value
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    /**
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     * @type bool
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     */
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    protected $case_sensitive = false;
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    public function __construct()
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    {
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    }
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    /**
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     * @param string $string
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     * @param HTMLPurifier_Config $config
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     * @param HTMLPurifier_Context $context
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     * @return bool|string
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     */
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    public function validate($string, $config, $context)
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    {
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        if ($this->valid_values === false) {
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            $this->valid_values = $config->get('Attr.AllowedFrameTargets');
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        }
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        return parent::validate($string, $config, $context);
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    }
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}
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// vim: et sw=4 sts=4