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libraries/joomla/form/fields/integer.php

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+<?php
+/**
+ * @package     Joomla.Platform
+ * @subpackage  Form
+ *
+ * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE
+ */
+
+defined('JPATH_PLATFORM') or die;
+
+JFormHelper::loadFieldClass('list');
+
+/**
+ * Form Field class for the Joomla Platform.
+ * Provides a select list of integers with specified first, last and step values.
+ *
+ * @package     Joomla.Platform
+ * @subpackage  Form
+ * @since       11.1
+ */
+class JFormFieldInteger extends JFormFieldList
+{
+
+	/**
+	 * The form field type.
+	 *
+	 * @var    string
+	 * @since  11.1
+	 */
+	protected $type = 'Integer';
+
+	/**
+	 * Method to get the field options.
+	 *
+	 * @return  array  The field option objects.
+	 *
+	 * @since   11.1
+	 */
+	protected function getOptions()
+	{
+		$options = array();
+
+		// Initialize some field attributes.
+		$first = (int) $this->element['first'];
+		$last = (int) $this->element['last'];
+		$step = (int) $this->element['step'];
+
+		// Sanity checks.
+		if ($step == 0)
+		{
+			// Step of 0 will create an endless loop.
+			return $options;
+		}
+		elseif ($first < $last && $step < 0)
+		{
+			// A negative step will never reach the last number.
+			return $options;
+		}
+		elseif ($first > $last && $step > 0)
+		{
+			// A position step will never reach the last number.
+			return $options;
+		}
+		elseif ($step < 0)
+		{
+			// Build the options array backwards.
+			for ($i = $first; $i >= $last; $i += $step)
+			{
+				$options[] = JHtml::_('select.option', $i);
+			}
+		}
+		else
+		{
+			// Build the options array.
+			for ($i = $first; $i <= $last; $i += $step)
+			{
+				$options[] = JHtml::_('select.option', $i);
+			}
+		}
+
+		// Merge any additional options in the XML definition.
+		$options = array_merge(parent::getOptions(), $options);
+
+		return $options;
+	}
+}