<?php

/**
 * Validates the HTML attribute ID.
 * @warning Even though this is the id processor, it
 *          will ignore the directive Attr:IDBlacklist, since it will only
 *          go according to the ID accumulator. Since the accumulator is
 *          automatically generated, it will have already absorbed the
 *          blacklist. If you're hacking around, make sure you use load()!
 */
class HTMLPurifier_AttrDef_HTML_ID extends HTMLPurifier_AttrDef
{
    /**
     * Determines whether or not we're validating an ID in a CSS
     * selector context.
     * @type bool
     */
    protected $selector;

    /**
     * @param bool $selector
     */
    public function __construct($selector = false)
    {
        $this->selector = $selector;
    }

    /**
     * @param string $id
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return bool|string
     */
    public function validate($id, $config, $context)
    {
        if (!$this->selector && !$config->get('Attr.EnableID')) {
            return false;
        }

        $id = trim($id); // trim it first

        if ($id === '') {
            return false;
        }

        $prefix = $config->get('Attr.IDPrefix');
        if ($prefix !== '') {
            $prefix .= $config->get('Attr.IDPrefixLocal');
            // prevent re-appending the prefix
            if (strpos($id, $prefix) !== 0) {
                $id = $prefix . $id;
            }
        } elseif ($config->get('Attr.IDPrefixLocal') !== '') {
            trigger_error(
                '%Attr.IDPrefixLocal cannot be used unless ' .
                '%Attr.IDPrefix is set',
                E_USER_WARNING
            );
        }

        if (!$this->selector) {
            $id_accumulator =& $context->get('IDAccumulator');
            if (isset($id_accumulator->ids[$id])) {
                return false;
            }
        }

        // we purposely avoid using regex, hopefully this is faster

        if ($config->get('Attr.ID.HTML5') === true) {
            if (preg_match('/[\t\n\x0b\x0c ]/', $id)) {
                return false;
            }
        } else {
            if (ctype_alpha($id)) {
                // OK
            } else {
                if (!ctype_alpha(@$id[0])) {
                    return false;
                }
                // primitive style of regexps, I suppose
                $trim = trim(
                    $id,
                    'A..Za..z0..9:-._'
                );
                if ($trim !== '') {
                    return false;
                }
            }
        }

        $regexp = $config->get('Attr.IDBlacklistRegexp');
        if ($regexp && preg_match($regexp, $id)) {
            return false;
        }

        if (!$this->selector) {
            $id_accumulator->add($id);
        }

        // if no change was made to the ID, return the result
        // else, return the new id if stripping whitespace made it
        //     valid, or return false.
        return $id;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NTI4MzE5MDEyNDQwODMyNiA5OTYyNzI2NjMwNzAzNTAzIDI4OTI3OTU0NDI0MDA3NjQ=