folderlist.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;

jimport('joomla.filesystem.folder');
JFormHelper::loadFieldClass('list');

/**
 * Supports an HTML select list of folder
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @since       11.1
 */
class JFormFieldFolderList extends JFormFieldList
{
        /**
         * The form field type.
         *
         * @var    string
         * @since  11.1
         */
        protected $type = 'FolderList';

        /**
         * The filter.
         *
         * @var    string
         * @since  3.2
         */
        protected $filter;

        /**
         * The exclude.
         *
         * @var    string
         * @since  3.2
         */
        protected $exclude;

        /**
         * The hideNone.
         *
         * @var    boolean
         * @since  3.2
         */
        protected $hideNone = false;

        /**
         * The hideDefault.
         *
         * @var    boolean
         * @since  3.2
         */
        protected $hideDefault = false;

        /**
         * The directory.
         *
         * @var    string
         * @since  3.2
         */
        protected $directory;

        /**
         * Method to get certain otherwise inaccessible properties from the form field object.
         *
         * @param   string  $name  The property name for which to the the value.
         *
         * @return  mixed  The property value or null.
         *
         * @since   3.2
         */
        public function __get($name)
        {
                switch ($name)
                {
                        case 'filter':
                        case 'exclude':
                        case 'hideNone':
                        case 'hideDefault':
                        case 'directory':
                                return $this->$name;
                }

                return parent::__get($name);
        }

        /**
         * Method to set certain otherwise inaccessible properties of the form field object.
         *
         * @param   string  $name   The property name for which to the the value.
         * @param   mixed   $value  The value of the property.
         *
         * @return  void
         *
         * @since   3.2
         */
        public function __set($name, $value)
        {
                switch ($name)
                {
                        case 'filter':
                        case 'directory':
                        case 'exclude':
                                $this->$name = (string) $value;
                                break;

                        case 'hideNone':
                        case 'hideDefault':
                                $value = (string) $value;
                                $this->$name = ($value === 'true' || $value === $name || $value === '1');
                                break;

                        default:
                                parent::__set($name, $value);
                }
        }

        /**
         * Method to attach a JForm object to the field.
         *
         * @param   SimpleXMLElement  $element  The SimpleXMLElement object representing the <field /> tag for the form field object.
         * @param   mixed             $value    The form field value to validate.
         * @param   string            $group    The field name group control value. This acts as as an array container for the field.
         *                                      For example if the field has name="foo" and the group value is set to "bar" then the
         *                                      full field name would end up being "bar[foo]".
         *
         * @return  boolean  True on success.
         *
         * @see     JFormField::setup()
         * @since   3.2
         */
        public function setup(SimpleXMLElement $element, $value, $group = null)
        {
                $return = parent::setup($element, $value, $group);

                if ($return)
                {
                        $this->filter  = (string) $this->element['filter'];
                        $this->exclude = (string) $this->element['exclude'];

                        $hideNone       = (string) $this->element['hide_none'];
                        $this->hideNone = ($hideNone == 'true' || $hideNone == 'hideNone' || $hideNone == '1');

                        $hideDefault       = (string) $this->element['hide_default'];
                        $this->hideDefault = ($hideDefault == 'true' || $hideDefault == 'hideDefault' || $hideDefault == '1');

                        // Get the path in which to search for file options.
                        $this->directory = (string) $this->element['directory'];
                }

                return $return;
        }

        /**
         * Method to get the field options.
         *
         * @return  array  The field option objects.
         *
         * @since   11.1
         */
        protected function getOptions()
        {
                $options = array();

                $path = $this->directory;

                if (!is_dir($path))
                {
                        $path = JPATH_ROOT . '/' . $path;
                }

                // Prepend some default options based on field attributes.
                if (!$this->hideNone)
                {
                        $options[] = JHtml::_('select.option', '-1', JText::alt('JOPTION_DO_NOT_USE', preg_replace('/[^a-zA-Z0-9_\-]/', '_', $this->fieldname)));
                }

                if (!$this->hideDefault)
                {
                        $options[] = JHtml::_('select.option', '', JText::alt('JOPTION_USE_DEFAULT', preg_replace('/[^a-zA-Z0-9_\-]/', '_', $this->fieldname)));
                }

                // Get a list of folders in the search path with the given filter.
                $folders = JFolder::folders($path, $this->filter);

                // Build the options list from the list of folders.
                if (is_array($folders))
                {
                        foreach ($folders as $folder)
                        {
                                // Check to see if the file is in the exclude mask.
                                if ($this->exclude)
                                {
                                        if (preg_match(chr(1) . $this->exclude . chr(1), $folder))
                                        {
                                                continue;
                                        }
                                }

                                $options[] = JHtml::_('select.option', $folder, $folder);
                        }
                }

                // Merge any additional options in the XML definition.
                $options = array_merge(parent::getOptions(), $options);

                return $options;
        }
}