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Editing: NotCallback.php

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<?php
/**
 * Rule checking the value via a callback function (method) with logical negation
 *
 * 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: NotCallback.php 303328 2010-09-13 16:36:34Z avb $
 * @link       http://pear.php.net/package/HTML_QuickForm2
 */

/**
 * Rule checking the value via a callback function (method)
 */
require_once 'HTML/QuickForm2/Rule/Callback.php';

/**
 * Rule checking the value via a callback function (method) with logical negation
 *
 * The Rule accepts the same configuration parameters as the Callback Rule
 * does, but the callback is expected to return false if the element is valid
 * and true if it is invalid.
 *
 * @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_NotCallback extends HTML_QuickForm2_Rule_Callback
{
   /**
    * Validates the owner element
    *
    * @return   bool    negated result of a callback function
    */
    protected function validateOwner()
    {
        $value  = $this->owner->getValue();
        $config = $this->getConfig();
        return !call_user_func_array(
            $config['callback'], array_merge(array($value), $config['arguments'])
        );
    }

protected function getJavascriptCallback()
    {
        HTML_QuickForm2_Loader::loadClass('HTML_QuickForm2_JavascriptBuilder');

$config    = $this->getConfig();
        $arguments = array($this->owner->getJavascriptValue());
        foreach ($config['arguments'] as $arg) {
            $arguments[] = HTML_QuickForm2_JavascriptBuilder::encode($arg);
        }
        return "function() { return !" . $this->findJavascriptName() .
               "(" . implode(', ', $arguments) . "); }";
    }
}
?>

Editing: NotCallback.php

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