locale.module 23.5 KB
Newer Older
Dries's avatar
 
Dries committed
1
<?php
2
// $Id$
Dries's avatar
 
Dries committed
3

Dries's avatar
 
Dries committed
4 5
/**
 * @file
6 7
 *   Add language handling functionality and enables the translation of the
 *   user interface to languages other than English.
Dries's avatar
 
Dries committed
8
 *
9 10 11 12
 *   When enabled, multiple languages can be set up. The site interface
 *   can be displayed in different languages, as well as nodes can have languages
 *   assigned. The setup of languages and translations is completely web based.
 *   Gettext portable object files are supported.
Dries's avatar
 
Dries committed
13 14
 */

15 16 17 18 19 20 21 22 23 24 25
/**
 * Language written left to right. Possible value of $language->direction.
 */
define('LANGUAGE_LTR', 0);

/**
 * Language written right to left. Possible value of $language->direction.
 */
define('LANGUAGE_RTL', 1);


Dries's avatar
 
Dries committed
26
// ---------------------------------------------------------------------------------
27
// Hook implementations
Dries's avatar
 
Dries committed
28

Dries's avatar
 
Dries committed
29 30 31
/**
 * Implementation of hook_help().
 */
32 33
function locale_help($path, $arg) {
  switch ($path) {
34
    case 'admin/help#locale':
35
      $output = '<p>'. t('The locale module allows you to present your Drupal site in a language other than the default English. You can use it to set up a multi-lingual website or replace given <em>built-in</em> text with text which has been customized for your site. Whenever the locale module encounters text which needs to be displayed, it tries to translate it into the currently selected language. If a translation is not available, then the string is remembered, so you can look up untranslated strings easily.') .'</p>';
36
      $output .= '<p>'. t('The locale module provides two options for providing translations. The first is the integrated web interface, via which you can search for untranslated strings, and specify their translations. An easier and less time-consuming method is to import existing translations for your language. These translations are available as <em>GNU gettext Portable Object files</em> (<em>.po</em> files for short). Translations for many languages are available for download from the translation page.') .'</p>';
37
      $output .= '<p>'. t("If an existing translation does not meet your needs, the <em>.po</em> files are easily edited with special editing tools. The locale module's import feature allows you to add strings from such files into your site's database. The export functionality enables you to share your translations with others, generating Portable Object files from your site strings.") .'</p>';
38
      $output .= '<p>'. t('For more information please read the configuration and customization handbook <a href="@locale">Locale page</a>.', array('@locale' => 'http://drupal.org/handbook/modules/locale/')) .'</p>';
39
      return $output;
40 41 42 43 44 45 46 47 48 49 50

    case 'admin/settings/language':
      return t("<p>Drupal provides support for the translation of its interface text into different languages. This page provides an overview of the installed languages. You can add a language on the <a href=\"@add-language\">add language page</a>, or directly by <a href=\"@import\">importing a translation</a>. If multiple languages are enabled, registered users will be able to set their preferred language. The site default will be used for anonymous visitors and for users without their own settings.</p><p>Drupal interface translations may be added or extended by several courses: by <a href=\"@import\">importing</a> an existing translation, by <a href=\"@search\">translating everything</a> from scratch, or by a combination of these approaches.</p>", array("@search" => url("admin/build/translate/search"), "@import" => url("admin/build/translate/import"), "@add-language" => url("admin/settings/language/add")));
    case 'admin/settings/language/add':
      return '<p>'. t("You need to add all languages in which you would like to display the site interface. If you can't find the desired language in the quick-add dropdown, then you will need to provide the proper language code yourself. The language code may be used to negotiate with browsers and to present flags, etc., so it is important to pick a code that is standardised for the desired language. You can also add a language by <a href=\"@import\">importing a translation</a>.", array("@import" => url("admin/build/translate/import"))) .'</p>';
    case 'admin/settings/language/configure':
      return '<p>'. t('The language used to display a web page is determined with a negotiation algorithm. You can choose how this algorithm should work. By default, there is no negotiation and the default language is used. You can use path prefixes (like "de" and "it" for German and Italian content) with different fallback options, so you can have web addresses like /de/contact and /it/contact. Alternatively you can use custom domains like de.example.com and it.example.com. Customize path prefixes and set domain names on the <a href="@languages">language editing pages</a>.', array('@languages' => url('admin/settings/language'))) .'</p>';

    case 'admin/build/translate':
      return '<p>'. t("This page provides an overview of interface translation on the site. Drupal groups all translatable strings in so called 'text groups'. Text groups are useful, because you can focus your translation efforts on the groups of text you care most about.  For example, a translation team could choose not to fully translate the text group that includes all the long help texts on the administration pages. Similarly, text groups are useful to ensure that certain aspects of the site are always fully translated.") . '</p>';
    case 'admin/build/translate/import':
51
      return '<p>'. t("This page allows you to import a translation provided in the gettext Portable Object (.po) format. The easiest way to get your site translated is to obtain an existing Drupal translation and to import it. You can find existing translations on the <a href=\"@url\">Drupal translation page</a>. Note that importing a translation file might take a while.", array('@url' => 'http://drupal.org/project/translations')) .'</p>';
52
    case 'admin/build/translate/export':
53
      return '<p>'. t("This page allows you to export Drupal strings. The first option is to export a translation so it can be shared. The second option generates a translation template, which contains all Drupal strings, but without their translations. You can use this template to start a new translation using various software packages designed for this task.") .'</p>';
54 55
    case 'admin/build/translate/search':
      return '<p>'. t("It is often convenient to get the strings from your setup on the <a href=\"@export\">export page</a>, and use a desktop Gettext translation editor to edit the translations. On this page you can search in the translated and untranslated strings, and the default English texts provided by Drupal.", array("@export" => url("admin/build/translate/export"))) .'</p>';
56

57 58 59 60 61
    case 'admin/build/block/configure':
      if ($arg[4] == 'locale' && $arg[5] == 0) {
        return '<p>'. t("This block is only shown if you have <a href=\"@languages\">at least two languages enabled</a> and you have a <a href=\"@configuration\">language negotiation setting</a> different from 'none', so you have different web addresses for different language versions.", array('@languages' => url('admin/settings/language'), '@configuration' => url('admin/settings/language/configure'))) .'</p>';
      }
      break;
Dries's avatar
 
Dries committed
62
  }
Dries's avatar
 
Dries committed
63 64
}

Dries's avatar
 
Dries committed
65
/**
Dries's avatar
 
Dries committed
66
 * Implementation of hook_menu().
67 68 69
 *
 * Locale module only provides administrative menu items, so all
 * menu items are invoked through locale_inc_callback().
Dries's avatar
 
Dries committed
70
 */
71
function locale_menu() {
72 73
  // Manage languages
  $items['admin/settings/language'] = array(
74
    'title' => 'Languages',
75 76 77 78
    'description' => 'Configure languages for content and the user interface.',
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('drupal_get_form', 'locale_languages_overview_form'),
    'access arguments' => array('administer languages'),
79
  );
80
  $items['admin/settings/language/overview'] = array(
81
    'title' => 'List',
82 83 84
    'weight' => 0,
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
85
  $items['admin/settings/language/add'] = array(
86
    'title' => 'Add language',
87 88
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('locale_languages_add_screen'), // two forms concatenated
89 90 91
    'weight' => 5,
    'type' => MENU_LOCAL_TASK,
  );
92
  $items['admin/settings/language/configure'] = array(
93
    'title' => 'Configure',
94 95
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('drupal_get_form', 'locale_languages_configure_form'),
96 97 98
    'weight' => 10,
    'type' => MENU_LOCAL_TASK,
  );
99
  $items['admin/settings/language/edit/%'] = array(
100
    'title' => 'Edit language',
101 102 103 104 105 106 107 108
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('drupal_get_form', 'locale_languages_edit_form', 4),
    'type' => MENU_CALLBACK,
  );
  $items['admin/settings/language/delete/%'] = array(
    'title' => 'Confirm',
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('drupal_get_form', 'locale_languages_delete_form', 4),
109 110 111
    'type' => MENU_CALLBACK,
  );

112 113 114 115 116 117 118 119 120 121
  // Translation functionality
  $items['admin/build/translate'] = array(
    'title' => 'Translate interface',
    'description' => 'Translate the built in interface as well as menu items and taxonomies.',
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('locale_translate_overview_screen'), // not a form, just a table
    'access arguments' => array('translate interface'),
  );
  $items['admin/build/translate/overview'] = array(
    'title' => 'Overview',
122 123 124
    'weight' => 0,
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
125 126
  $items['admin/build/translate/search'] = array(
    'title' => 'Search',
127 128
    'weight' => 10,
    'type' => MENU_LOCAL_TASK,
129 130
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('locale_translate_seek_screen'), // search results and form concatenated
131
  );
132 133 134 135
  $items['admin/build/translate/import'] = array(
    'title' => 'Import',
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('drupal_get_form', 'locale_translate_import_form'),
136 137 138
    'weight' => 20,
    'type' => MENU_LOCAL_TASK,
  );
139 140 141 142 143 144
  $items['admin/build/translate/export'] = array(
    'title' => 'Export',
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('locale_translate_export_screen'), // possibly multiple forms concatenated
    'weight' => 30,
    'type' => MENU_LOCAL_TASK,
145
  );
146
  $items['admin/build/translate/edit/%'] = array(
147
    'title' => 'Edit string',
148 149
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('drupal_get_form', 'locale_translate_edit_form', 4),
150 151
    'type' => MENU_CALLBACK,
  );
152
  $items['admin/build/translate/delete/%'] = array(
153
    'title' => 'Delete string',
154 155
    'page callback' => 'locale_inc_callback',
    'page arguments' => array('locale_translate_delete', 4),  // directly deletes, no confirmation
156 157
    'type' => MENU_CALLBACK,
  );
Dries's avatar
 
Dries committed
158

Dries's avatar
 
Dries committed
159
  return $items;
Dries's avatar
 
Dries committed
160 161
}

162 163 164 165 166 167 168 169 170 171
/**
 * Wrapper function to be able to set callbacks in locale.inc
 */
function locale_inc_callback() {
  $args = func_get_args();
  $function = array_shift($args);
  include_once './includes/locale.inc';
  return call_user_func_array($function, $args);
}

Dries's avatar
 
Dries committed
172
/**
Dries's avatar
 
Dries committed
173
 * Implementation of hook_perm().
Dries's avatar
 
Dries committed
174
 */
Dries's avatar
 
Dries committed
175
function locale_perm() {
176 177 178 179 180 181 182 183 184 185 186
  return array('administer languages', 'translate interface');
}

/**
 * Implementation of hook_locale().
 */
function locale_locale($op = 'groups') {
  switch ($op) {
    case 'groups':
      return array('default' => t('Built-in interface'));
  }
Dries's avatar
 
Dries committed
187 188 189 190 191 192
}

/**
 * Implementation of hook_user().
 */
function locale_user($type, $edit, &$user, $category = NULL) {
193 194 195 196 197
  global $language;

  // If we have more then one language and either creating a user on the
  // admin interface or edit the user, show the language selector.
  if (variable_get('language_count', 1) > 1 && ($type == 'register' && user_access('administer users') || $type == 'form' && $category == 'account' )) {
198 199
    $languages = language_list('enabled');
    $languages = $languages['1'];
200 201 202 203

    // If the user is being created, we set the user language to the page language.
    $user_language = $user ? user_language($user) : $language;

204
    $names = array();
205
    foreach ($languages as $langcode => $language) {
206
      $names[$langcode] = t($language->name) .' ('. $language->native .')';
Dries's avatar
 
Dries committed
207
    }
208 209 210
    $form['locale'] = array(
      '#type' => 'fieldset',
      '#title' => t('Language settings'),
211 212
      '#weight' => 1,
    );
213 214 215
    
    $form['locale']['language'] = array(
      '#type' => 'radios',
216
      '#title' => t('Language'),
217
      '#default_value' => $user_language->language,
218
      '#options' => $names,
219
      '#description' => t('Sets the default site interface and e-mail language for this account.'),
220
    );
221
    return $form;
Dries's avatar
 
Dries committed
222 223 224
  }
}

225 226 227
/**
 * Implementation of hook_form_alter(). Adds language fields to forms.
 */
228
function locale_form_alter(&$form, $form_state, $form_id) {
229
  switch ($form_id) {
230 231

    // Language field for paths
232 233
    case 'path_admin_edit':
      $form['language'] = array(
234
        '#type' => 'select',
235 236
        '#title' => t('Language'),
        '#options' => array('' => t('All languages')) + locale_language_list('name'),
237 238 239
        '#default_value' => $form['language']['#value'],
        '#weight' => -10,
        '#description' => t('Path aliases added for languages take precedence over path aliases added for all languages for the same Drupal path.'),
240 241
      );
      break;
242 243 244 245 246 247 248 249 250

    // Language setting for content types
    case 'node_type_form':
      if (isset($form['identity']['type'])) {
        $form['workflow']['language'] = array(
          '#type' => 'radios',
          '#title' => t('Multilingual support'),
          '#default_value' => variable_get('language_'. $form['#node_type']->type, 0),
          '#options' => array(t('Disabled'), t('Enabled')),
251
          '#description' => t('Enable multilingual support for this content type. If enabled, a language selection field will be added to the editing form, allowing you to select from one of the <a href="!languages">enabled languages</a>. If disabled, new posts are saved with the default language. Existing content will not be affected by changing this option.', array('!languages' => url('admin/settings/language'))),
252 253 254 255 256 257 258
        );
      }
      break;

    // Language field for nodes
    default:
      if ($form['#id'] == 'node-form') {
259
        if (isset($form['#node']->type) && variable_get('language_' . $form['#node']->type, 0)) {
260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275
          $form['language'] = array(
            '#type' => 'select',
            '#title' => t('Language'),
            '#default_value' => (isset($form['#node']->language) ? $form['#node']->language : ''),
            '#options' => array('' => t('Language neutral')) + locale_language_list('name'),
          );
        }
        // Node type without language selector: assign the default for new nodes
        elseif (!isset($form['#node']->nid)) {
          $default = language_default();
          $form['language'] = array(
            '#type' => 'value',
            '#value' => $default->language
          );
        }
      }
276 277 278
  }
}

279 280 281 282 283 284 285 286 287 288
/**
 * Implementation of hook_theme()
 */
function locale_theme() {
  return array(
    'locale_languages_overview_form' => array(
      'arguments' => array('form' => array()),
    ),
  );
}
289

Dries's avatar
 
Dries committed
290
// ---------------------------------------------------------------------------------
291
// Locale core functionality
Dries's avatar
 
Dries committed
292

Dries's avatar
 
Dries committed
293
/**
294
 * Provides interface translation services.
Dries's avatar
 
Dries committed
295 296
 *
 * This function is called from t() to translate a string if needed.
297 298 299
 *
 * @param $string
 *   A string to look up translation for. If omitted, all the
300
 *   cached strings will be returned in all languages already
301 302 303
 *   used on the page.
 * @param $langcode
 *   Language code to use for the lookup.
Dries's avatar
 
Dries committed
304
 */
305
function locale($string = NULL, $langcode = NULL) {
306
  global $language;
Dries's avatar
 
Dries committed
307
  static $locale_t;
Dries's avatar
 
Dries committed
308

309 310 311 312 313
  // Return all cached strings if no string was specified
  if (!isset($string)) {
    return $locale_t;
  }

314 315
  $langcode = isset($langcode) ? $langcode : $language->language;

316
  // Store database cached translations in a static var.
317 318
  if (!isset($locale_t[$langcode])) {
    $locale_t[$langcode] = array();
319 320 321
    // Disabling the usage of string caching allows a module to watch for
    // the exact list of strings used on a page. From a performance
    // perspective that is a really bad idea, so we have no user
322 323 324 325 326 327 328 329 330
    // interface for this. Be careful when turning this option off!
    if (variable_get('locale_cache_strings', 1) == 1) {
      if (!($cache = cache_get('locale:'. $langcode, 'cache'))) {
        locale_refresh_cache();
        $cache = cache_get('locale:'. $langcode, 'cache');
      }
      if ($cache) {
        $locale_t[$langcode] = $cache->data;
      }
331
    }
Dries's avatar
 
Dries committed
332 333
  }

Dries's avatar
 
Dries committed
334 335
  // We have the translation cached (if it is TRUE, then there is no
  // translation, so there is no point in checking the database)
336 337
  if (isset($locale_t[$langcode][$string])) {
    $string = ($locale_t[$langcode][$string] === TRUE ? $string : $locale_t[$langcode][$string]);
Dries's avatar
 
Dries committed
338
  }
Dries's avatar
 
Dries committed
339

340
  // We do not have this translation cached, so get it from the DB.
Dries's avatar
 
Dries committed
341
  else {
342 343 344 345 346 347 348
    $translation = db_fetch_object(db_query("SELECT s.lid, t.translation FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid WHERE s.source = '%s' AND t.language = '%s' AND s.textgroup = 'default'", $string, $langcode));
    if ($translation) {
      // We have the source string at least.
      if ($translation->lid) {
        // Cache translation string or TRUE if no translation exists.
        $translation = (empty($translation->translation) ? TRUE : $translation->translation);
        $locale_t[$langcode][$string] = $translation;
349
      }
Dries's avatar
 
Dries committed
350 351
    }
    else {
352 353 354 355
      // We don't have the source string, cache this as untranslated.
      db_query("INSERT INTO {locales_source} (location, source, textgroup) VALUES ('%s', '%s', 'default')", request_uri(), $string);
      $locale_t[$langcode][$string] = TRUE;
      // Clear locale cache so this string can be added in a later request.
356
      cache_clear_all('locale:'. $langcode, 'cache');
Dries's avatar
 
Dries committed
357
    }
Dries's avatar
 
Dries committed
358 359
  }

Dries's avatar
 
Dries committed
360 361
  return $string;
}
Dries's avatar
 
Dries committed
362

Dries's avatar
 
Dries committed
363
/**
364
 * Refreshes database stored cache of translations.
Dries's avatar
 
Dries committed
365 366 367 368
 *
 * We only store short strings to improve performance and consume less memory.
 */
function locale_refresh_cache() {
369 370
  $languages = language_list('enabled');
  $languages = $languages['1'];
Dries's avatar
 
Dries committed
371

372
  foreach ($languages as $language) {
373
    $result = db_query("SELECT s.source, t.translation, t.language FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid WHERE t.language = '%s' AND s.textgroup = 'default' AND LENGTH(s.source) < 75", $language->language);
374
    $t = array();
Dries's avatar
 
Dries committed
375 376
    while ($data = db_fetch_object($result)) {
      $t[$data->source] = (empty($data->translation) ? TRUE : $data->translation);
Dries's avatar
 
Dries committed
377
    }
378
    cache_set('locale:'. $language->language, $t);
Dries's avatar
 
Dries committed
379 380 381
  }
}

Dries's avatar
 
Dries committed
382
/**
383
 * Returns plural form index for a specific number.
Dries's avatar
 
Dries committed
384
 *
385
 * The index is computed from the formula of this language.
386
 *
387 388 389 390 391
 * @param $count
 *   Number to return plural for.
 * @param $langcode
 *   Optional language code to translate to a language other than
 *   what is used to display the page.
Dries's avatar
 
Dries committed
392
 */
393
function locale_get_plural($count, $langcode = NULL) {
394
  global $language;
Dries's avatar
 
Dries committed
395 396
  static $locale_formula, $plurals = array();

397
  $langcode = $langcode ? $langcode : $language->language;
398

399
  if (!isset($plurals[$langcode][$count])) {
Dries's avatar
 
Dries committed
400
    if (!isset($locale_formula)) {
401 402
      $language_list = language_list();
      $locale_formula[$langcode] = $language_list[$langcode]->formula;
Dries's avatar
 
Dries committed
403
    }
404
    if ($locale_formula[$langcode]) {
Dries's avatar
 
Dries committed
405
      $n = $count;
406 407
      $plurals[$langcode][$count] = @eval('return intval('. $locale_formula[$langcode] .');');
      return $plurals[$langcode][$count];
Dries's avatar
 
Dries committed
408 409
    }
    else {
410
      $plurals[$langcode][$count] = -1;
Dries's avatar
 
Dries committed
411
      return -1;
412
    }
Dries's avatar
 
Dries committed
413
  }
414
  return $plurals[$langcode][$count];
415
}
Dries's avatar
 
Dries committed
416

417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434

/**
 * Returns a language name
 */
function locale_language_name($lang) {
  static $list = NULL;
  if (!isset($list)) {
    $list = locale_language_list();
  }
  return ($lang && isset($list[$lang])) ? $list[$lang] : t('All');
}

/**
 * Returns array of language names
 *
 * @param $field
 *   'name' => names in current language, localized
 *   'native' => native names
435 436
 * @param $all
 *   Boolean to return all languages or only enabled ones
437
 */
438 439 440 441 442 443 444 445
function locale_language_list($field = 'name', $all = FALSE) {
  if ($all) {
    $languages = language_list();
  }
  else {
    $languages = language_list('enabled');
    $languages = $languages[1];
  }
446
  $list = array();
447
  foreach ($languages as $language) {
448 449 450 451
    $list[$language->language] = ($field == 'name') ? t($language->name) : $language->$field;
  }
  return $list;
}
452 453 454 455 456 457 458 459 460 461 462 463 464

/**
 * Imports translations when new modules or themes are installed or enabled.
 *
 * This function will either import translation for the component change
 * right away, or start a batch if more files need to be imported.
 *
 * @param $components
 *   An array of component (theme and/or module) names to import
 *   translations for.
 */
function locale_system_update($components) {
  include_once 'includes/locale.inc';
465
  if ($batch = locale_batch_by_component($components)) {
466 467 468 469 470 471 472 473 474 475 476 477 478 479
    batch_set($batch);
  }
}

/**
 * Finished callback of system page locale import batch.
 * Inform the user of translation files imported.
 */
function _locale_batch_system_finished($success, $results) {
  if ($success) {
    drupal_set_message(format_plural(count($results), 'One translation file imported for the newly installed modules.', '@count translation files imported for the newly installed modules.'));
  }
}

480 481 482 483 484 485 486 487 488 489
/**
 * Finished callback of language addition locale import batch.
 * Inform the user of translation files imported.
 */
function _locale_batch_language_finished($success, $results) {
  if ($success) {
    drupal_set_message(format_plural(count($results), 'One translation file imported for the enabled modules.', '@count translation files imported for the enabled modules.'));
  }
}

490 491 492 493 494 495 496 497 498 499 500 501 502 503
/**
 * Perform interface translation import as a batch step.
 *
 * @param $filepath
 *   Path to a file to import.
 * @param $results
 *   Contains a list of files imported.
 */
function _locale_batch_import($filepath, &$context) {
  include_once 'includes/locale.inc';
  // The filename is either {langcode}.po or {prefix}.{langcode}.po, so
  // we can extract the language code to use for the import from the end.
  if (preg_match('!(/|\.)([^\.]+)\.po$!', $filepath, $langcode)) {
    $file = (object) array('filename' => basename($filepath), 'filepath' => $filepath);
504
    _locale_import_read_po('db-store', $file, LOCALE_IMPORT_KEEP, $langcode[2]);
505 506 507
    $context['results'][] = $filepath;
  }
}
508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534

// ---------------------------------------------------------------------------------
// Language switcher block

/**
 * Implementation of hook_block().
 * Displays a language switcher. Translation links may be provided by other modules.
 */
function locale_block($op = 'list', $delta = 0) {
  if ($op == 'list') {
    $block[0]['info'] = t('Language switcher');
    return $block;
  }

  // Only show if we have at least two languages and language dependent
  // web addresses, so we can actually link to other language versions.
  elseif ($op == 'view' && variable_get('language_count', 1) > 1 && variable_get('language_negotiation', LANGUAGE_NEGOTIATION_NONE) != LANGUAGE_NEGOTIATION_NONE) {
    $languages = language_list('enabled');
    $links = array();
    foreach ($languages[1] as $language) {
      $links[$language->language] = array(
        'href'       => $_GET['q'],
        'title'      => $language->native,
        'language'   => $language,
        'attributes' => array('class' => 'language-link'),
      );
    }
535

536 537 538 539 540
    // Allow modules to provide translations for specific links.
    // A translation link may need to point to a different path or use
    // a translated link text before going through l(), which will just
    // handle the path aliases.
    drupal_alter('translation_link', $links, $_GET['q']);
541

542 543 544 545 546
    $block['subject'] = t('Languages');
    $block['content'] = theme('links', $links, array());
    return $block;
  }
}