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msd2/tracking/piwik/libs/HTML/QuickForm2/Rule/Required.php

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+<?php
+/**
+ * Rule for required elements
+ *
+ * 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: Required.php 294057 2010-01-26 21:10:28Z avb $
+ * @link       http://pear.php.net/package/HTML_QuickForm2
+ */
+
+/**
+ * Rule checking that the form field is not empty
+ */
+// require_once 'HTML/QuickForm2/Rule/Nonempty.php';
+
+/**
+ * Rule for required elements
+ *
+ * The main difference from "nonempty" Rule is that
+ * - elements to which this Rule is attached will be considered required
+ *   ({@link HTML_QuickForm2_Node::isRequired()} will return true for them) and
+ *   marked accordingly when outputting the form
+ * - this Rule can only be added directly to the element and other Rules can
+ *   only be added to it via and_() method
+ *
+ * @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_Required extends HTML_QuickForm2_Rule_Nonempty
+{
+   /**
+    * Disallows adding a rule to the chain with an "or" operator
+    *
+    * Required rules are different from all others because they affect the
+    * visual representation of an element ("* denotes required field").
+    * Therefore we cannot allow chaining other rules to these via or_(), since
+    * this will effectively mean that the field is not required anymore and the
+    * visual difference is bogus.
+    *
+    * @param    HTML_QuickForm2_Rule
+    * @throws   HTML_QuickForm2_Exception
+    */
+    public function or_(HTML_QuickForm2_Rule $next)
+    {
+        throw new HTML_QuickForm2_Exception(
+            'or_(): Cannot add a rule to "required" rule'
+        );
+    }
+}
+?>