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Editing: NotRegex.php

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<?php
/**
 * Checks that the element's value does not match a regular expression
 *
 * PHP version 5
 *
 * LICENSE:
 *
 * Copyright (c) 2006-2010, Alexey Borzov <avb@php.net>,
 *                          Bertrand Mansion <golgote@mamasam.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *    * The names of the authors may not be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @category   HTML
 * @package    HTML_QuickForm2
 * @author     Alexey Borzov <avb@php.net>
 * @author     Bertrand Mansion <golgote@mamasam.com>
 * @license    http://opensource.org/licenses/bsd-license.php New BSD License
 * @version    SVN: $Id: NotRegex.php 304176 2010-10-07 10:46:52Z avb $
 * @link       http://pear.php.net/package/HTML_QuickForm2
 */

/**
 * Validates values using regular expressions
 */
require_once 'HTML/QuickForm2/Rule/Regex.php';

/**
 * Checks that the element's value does not match a regular expression
 *
 * The Rule behaves like Regex Rule, but it considers the element valid if its
 * value does not match the given regular expression.
 *
 * @category   HTML
 * @package    HTML_QuickForm2
 * @author     Alexey Borzov <avb@php.net>
 * @author     Bertrand Mansion <golgote@mamasam.com>
 * @version    Release: @package_version@
 */
class HTML_QuickForm2_Rule_NotRegex extends HTML_QuickForm2_Rule_Regex
{
   /**
    * Validates the owner element
    *
    * @return   bool    whether element's value does not match given regular expression
    */
    protected function validateOwner()
    {
        $value = $this->owner->getValue();
        if ($this->owner instanceof HTML_QuickForm2_Element_InputFile) {
            if (!isset($value['error']) || UPLOAD_ERR_NO_FILE == $value['error']) {
                return true;
            }
            $value = $value['name'];
        } elseif (!strlen($value)) {
            return true;
        }
        return !preg_match($this->getConfig() . 'D', $value);
    }

/**
    * Returns the client-side validation callback
    *
    * For this to work properly, slashes have to be used as regex delimiters.
    * The method takes care of transforming PHP unicode escapes in regexps to
    * JS unicode escapes if using 'u' modifier (see bug #12376)
    *
    * @return   string
    */
    protected function getJavascriptCallback()
    {
        $regex = $this->getConfig();

if ($pos = strpos($regex, 'u', strrpos($regex, '/'))) {
            $regex = substr($regex, 0, $pos) . substr($regex, $pos + 1);
            $regex = preg_replace('/(?<!\\\\)(?>\\\\\\\\)*\\\\x{([a-fA-F0-9]+)}/', '\\u$1', $regex);
        }

return "function() { var value = " . $this->owner->getJavascriptValue() .
               "; return qf.rules.empty(value) || !{$regex}.test(value); }";
    }
}
?>

Editing: NotRegex.php

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