Sindbad~EG File Manager

<?php

/**
 * @file
 * Determines which content to show depending on the current page language and the default language of the site
 */

/**
 * Implements hook_permission().
 */
function language_switcher_permission() {
  return array(
    'administer language_switcher' => array(
      'title' => t('Administer Language Switcher'),
    ),
  );
}

/**
 * Implements hook_menu().
 */
function language_switcher_menu() {
  $items['admin/config/regional/language/language_switcher'] = array(
    'title' => 'Language Switcher',
    'description' => 'Determines which content to show depending on the current page language and the default language of the site.',
    'page arguments' => array('language_switcher_admin_settings'),
    'page callback' => 'drupal_get_form',
    'access arguments' => array('administer language_switcher'),
    'weight' => 20,
    'file' => 'language_switcher.admin.inc',
    'type' => MENU_LOCAL_TASK,
  );

  return $items;
}

/**
 * Get enabled languages.
 */
function language_switcher_enabled_languages() {
  $enabled = language_list('enabled');
  $enabled = $enabled[1];
  $languages = array();

  foreach ($enabled as $langcode => $language) {
    $languages[] = $langcode;
  }

  return $languages;
}

/**
 * Implements hook_page_alter().
 *
 * Re-sort and group nodes in respect to each node's language.
 */
function language_switcher_page_alter(&$page) {
  $enabled = language_switcher_enabled_languages();
  $mode = variable_get('language_switcher_mode', 'off');

  if ($mode == 'multi') {
    foreach ($page as $region => $item) {
      if (is_array($item) && isset($item['system_main']) && isset($item['system_main']['nodes'])) {
        $nodes = $page[$region]['system_main']['nodes'];

        $lang_sorted_nodes = array();
        foreach ($nodes as $key => $value) {
          // If it's a node with language.
          if (isset($value['#node']->language)) {
            // If node listing page, e.g. frontpage.
            if ($value['#view_mode'] == 'teaser') {
              $langcode = $value['#node']->language;
              if (in_array($langcode, $enabled)) {
                $lang_sorted_nodes[$langcode][] = $value;
              }
            }
            elseif ($value['#view_mode'] == 'full') {
              // @TODO fix single node view
              // @TODO support entity_translation
              return;

              $node = node_load($key);
              if ($node->tnid) {
                $translations = translation_node_get_translations($node->tnid);
                $nids = array();
                foreach ($translations as $translation) {
                  $nids[] = $translation->nid;
                }

                $translations_nodes = node_load_multiple($nids);
                $builds = node_view_multiple($translations_nodes, $value['#view_mode']);
                $page[$region]['system_main']['nodes'] = $builds;

                // @TODO do we have a page with many full nodes?
                return;
              }
            }
          }
          else {
            // Other than node, usually #sorted prop.
            $prop[$key] = $value;
          }
        }

        language_switcher_add_files();
        $items = $lang_sorted_nodes + $prop;
        $page['content']['system_main']['nodes'] = $items;
      }
    }
  }
}

/**
 * Implements hook_preprocess_node().
 */
function language_switcher_preprocess_node(&$vars) {
  $vars['classes_array'][] = $vars['language'];
}

/**
 * Implements hook_query_TAG_alter().
 *
 * Rewrite node queries so language selection options are enforced.
 */
function language_switcher_query_node_access_alter(QueryAlterableInterface $query) {
  global $language_content;
  $mode = variable_get('language_switcher_mode', 'off');

  $tables =& $query->getTables();

  if (($mode == 'strict') && (isset($tables['n']))) {
    // if the language field is present we don't want to do any filtering.
    $fields = $query->getFields();

    if (array_key_exists('language', $query->getFields())) {
      return;
    }
    else {
      $query->condition('n.language', $language_content->language, '=');
    }
  }
}

/**
 * Add required files to override default language switcher block behaviour.
 */
function language_switcher_add_files() {
  drupal_add_js(array('languages' => language_switcher_enabled_languages()), 'setting');
  drupal_add_js(drupal_get_path('module', 'language_switcher') . '/language_switcher.js');
  drupal_add_css(drupal_get_path('module', 'language_switcher') . '/language_switcher.css');
}