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<?php
/**
* Rule checking that the field is empty
*
* PHP version 5
*
* LICENSE:
*
* Copyright (c) 2006-2014, 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
* @link http://pear.php.net/package/HTML_QuickForm2
*/
/**
* Base class for HTML_QuickForm2 rules
*/
require_once 'HTML/QuickForm2/Rule.php';
/**
* Rule checking that the field is empty
*
* Handles both simple form fields and file uploads, the latter are considered
* valid iff no file upload was attempted.
*
* The rule doesn't make much sense if used separately, but can be very helpful
* if chained:
* <code>
* $spamCheck->addRule('empty')
* ->or_($email->createRule('nonempty', 'Supply a valid email if you want to receive our spam')
* ->and_($email->createRule('email')));
* </code>
*
* @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 Release: 2.0.2
* @link http://pear.php.net/package/HTML_QuickForm2
*/
class HTML_QuickForm2_Rule_Empty extends HTML_QuickForm2_Rule
{
protected function validateOwner()
{
$value = $this->owner->getValue();
if ($this->owner instanceof HTML_QuickForm2_Element_InputFile) {
return isset($value['error']) && UPLOAD_ERR_NO_FILE == $value['error'];
} elseif (is_array($value)) {
return 0 == count(array_filter($value, 'strlen'));
} else {
return 0 == strlen($value);
}
}
protected function getJavascriptCallback()
{
return "function() { return qf.rules.empty(" . $this->owner->getJavascriptValue() . "); }";
}
}
?>
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