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;
        }
}