language.module 29.5 KB
Newer Older
1 2 3 4 5 6 7
<?php

/**
 * @file
 * Add language handling functionality to Drupal.
 */

8
use Drupal\Core\Form\FormStateInterface;
9
use Drupal\Core\Language\LanguageInterface;
10
use Drupal\Core\Routing\RouteMatchInterface;
11
use Drupal\language\Entity\ConfigurableLanguage;
12 13 14 15
use Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationUI;
use Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationUrl;
use Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationUrlFallback;
use Drupal\node\NodeTypeInterface;
16

17 18 19
/**
 * Implements hook_help().
 */
20
function language_help($route_name, RouteMatchInterface $route_match) {
21 22
  switch ($route_name) {
    case 'help.page.language':
23 24
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
25
      $output .= '<p>' . t('The Language module allows you to configure the languages used on your site, and provides information for the for <a href="!content">Content Translation</a>, <a href="!interface">Interface Translation</a>, and <a href="!configuration">Configuration Translation</a> modules, if they are enabled. For more information, see <a href="!doc_url">the online documentation for the Language module</a>.', array('!doc_url' => 'https://drupal.org/documentation/modules/language', '!content' => (\Drupal::moduleHandler()->moduleExists('content_translation')) ? \Drupal::url('help.page', array('name' => 'content_translation')) : '#', '!interface' => (\Drupal::moduleHandler()->moduleExists('locale')) ? \Drupal::url('help.page', array('name' => 'locale')) : '#', '!configuration' => (\Drupal::moduleHandler()->moduleExists('config_translation')) ? \Drupal::url('help.page', array('name' => 'config_translation')) : '#')) . '</p>';
26 27
      $output .= '<h3>' . t('Uses') . '</h3>';
      $output .= '<dl>';
28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
      $output .= '<dt>' . t('Adding languages') . '</dt>';
      $output .= '<dd>' . t('You can add languages on the <a href="!language_list">Languages</a> page by selecting <em>Add language</em> and choosing a language from the drop-down menu. This language is then displayed in the languages list, where it can be configured further. If the <a href="!interface">Interface translation module</a> is enabled, and the <em>translation server</em> is set as a translation source, then the interface translation for this language is automatically downloaded as well.' , array('!language_list' => \Drupal::url('language.admin_overview'), '!interface' => (\Drupal::moduleHandler()->moduleExists('locale')) ? \Drupal::url('help.page', array('name' => 'locale')) : '#')) . '</dd>';
      $output .= '<dt>' . t('Adding custom languages') . '</dt>';
      $output .= '<dd>' . t('You can add a language that is not provided in the drop-down list by choosing <em>Custom language</em> at the end of the list. You then have to configure its language code, name, and direction in the form provided.') . '</dd>';
      $output .= '<dt>' . t('Configuring content languages') . '</dt>';
      $output .= '<dd>' . t('By default, content is created in the site\'s default language and no language selector is displayed on content creation pages. On the <a href="!content_language">Content language</a> page you can customize the language configuration for any supported content entity on your site (for example for content types or menu links). After choosing an entity, you are provided with a drop-down menu to set the default language and a check-box to display language selectors.', array('!content_language' => \Drupal::url('language.content_settings_page'))) . '</dd>';
      $output .= '<dt>' . t('Adding a language switcher block') . '</dt>';
      $output .= '<dd>' . t('If the Block module is enabled, then you can add a language switcher block on the <a href="!blocks">Block layout</a> page to allow users to switch between languages.', array('!blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</dd>';
      $output .= '<dt>' . t('Making a block visible per language') . '</dt>';
      $output .= '<dd>' . t('If the Block module is enabled, then the Language module allows you to set the visibility of a block based on selected languages on the <a href="!blocks">Block layout</a> page.', array('!blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</dd>';
      $output .= '<dt>' . t('Choosing user languages') . '</dt>';
      $output .= '<dd>' . t('Users can choose a <em>Site language</em> on their profile page. This language is used for email messages, and can be used by modules to determine a user\'s language. It can also be used for interface text, if the <em>User</em> method is enabled as a <em>Detection and selection</em> method (see below). Administrative users can choose a separate <em>Administration pages language</em> for the interface text on administration pages. This configuration is only available on the user\'s profile page if the <em>Account administration pages</em> method is enabled (see below).') . '</dd>';
      $output .= '<dt>' . t('Language detection and selection') . '</dt>';
      $output .= '<dd>' . t('The <a href="!detection">Detection and selection</a> page provides several methods for deciding which language is used for displaying interface text. When a method detects and selects an interface language, then the following methods in the list are not applied. You can order them by importance, with your preferred method at the top of the list, followed by one or several fall-back methods.', array('!detection' => \Drupal::url('language.negotiation')));
      $output .= '<ul><li>' . t('<em>URL</em> sets the interface language based on a path prefix or domain (for example specifying <em>de</em> for German would result in URLs like <em>example.com/de/contact</em>). The default language does not require a path prefix, but can have one assigned as well. If the language detection is done by domain name, a domain needs to be specified for each language.') . '</li>';
      $output .= '<li>' . t('<em>Session</em> determines the interface language from a request or session parameter (for example <em>example.com?language=de</em> would set the interface language to German based on the use of <em>de</em> as the <em>language</em> parameter).') . '</li>';
      $output .= '<li>' . t('<em>User</em> follows the language configuration set on the user\'s profile page.') . '</li>';
      $output .= '<li>' . t('<em>Browser</em> sets the interface language based on the browser\'s language settings. Since browsers use different language codes to refer to the same languages, you can add and edit languages codes to map the browser language codes to the <a href="!language_list">language codes</a> used on your site.',  array('!language_list' => \Drupal::url('language.admin_overview'))) . '</li>';
      $output .= '<li>' . t('<em>Account administration pages</em> follows the configuration set as <em>Administration pages language</em> on the profile page of an administrative user. This method is similar to the <em>User</em> method, but only sets the interface text language on administration pages, independent of the interface text language on other pages.') . '</li>';
      $output .= '<li>' . t('<em>Selected language</em> allows you to specify the site\'s default language or a specific language as the fall-back language. This method should be listed last.') . '</li></ul></dd>';
48 49 50
      $output .= '</dl>';
      return $output;

51
    case 'language.admin_overview':
52
      return '<p>' . t('Reorder the added languages to set their order in the language switcher block and, when editing content, in the list of selectable languages. This ordering does not impact <a href="@detection">detection and selection</a>.', array('@detection' => url('admin/config/regional/language/detection'))) . '</p>';
53

54
    case 'language.add':
55
      return '<p>' . t('Add a language to be supported by your site. If your desired language is not available, pick <em>Custom language...</em> at the end and provide a language code and other details manually.') . '</p>';
56

57
    case 'language.negotiation':
58
      $output = '<p>' . t('Define how to decide which language is used to display page elements (primarily text provided by modules, such as field labels and help text). This decision is made by evaluating a series of detection methods for languages; the first detection method that gets a result will determine which language is used for that type of text. Be aware that some language negotiation methods are unreliable under certain conditions, such as browser detection when page-caching is enabled and a user is not currently logged in. Define the order of evaluation of language detection methods on this page. The default language can be changed at the <a href="!region-settings">Regional settings</a> page.', array('!region-settings' => \Drupal::url('system.regional_settings'))) . '</p>';
59 60
      return $output;

61
    case 'language.negotiation_session':
62 63 64
      $output = '<p>' . t('Determine the language from a request/session parameter. Example: "http://example.com?language=de" sets language to German based on the use of "de" within the "language" parameter.') . '</p>';
      return $output;

65
    case 'language.negotiation_browser':
66
      $output = '<p>' . t('Browsers use different language codes to refer to the same languages. You can add and edit mappings from browser language codes to the <a href="!configure-languages">languages used</a>.', array('!configure-languages' => \Drupal::url('language.admin_overview'))) . '</p>';
67 68
      return $output;

69
    case 'language.negotiation_selected':
70
      $output = '<p>' . t('Changing the selected language here (and leaving this option as the last among the detection and selection options) is the easiest way to change the fallback language for the website, if you need to change how your site works by default (e.g., when using an empty path prefix or using the default domain). <a href="!admin-change-language">Changing the site\'s default language</a> itself might have other undesired side effects.', array('!admin-change-language' => \Drupal::url('language.admin_overview'))) . '</p>';
71 72
      return $output;

73
    case 'entity.block.edit_form':
74
      if (($block = $route_match->getParameter('block')) && $block->get('plugin') == 'language_block:language_interface') {
75
        return '<p>' . t('With multiple languages added, registered users can select their preferred language and authors can assign a specific language to content.') . '</p>';
76 77
      }
      break;
78

79
    case 'block.admin_add':
80
      if ($route_match->getParameter('plugin_id') == 'language_block:language_interface') {
81 82 83 84 85
        return '<p>' . t('With multiple languages added, registered users can select their preferred language and authors can assign a specific language to content.') . '</p>';
      }
      break;

    case 'language.content_settings_page':
86
      return t('Change language settings for <em>content types</em>, <em>taxonomy vocabularies</em>, <em>user profiles</em>, or any other supported element on your site. By default, language settings hide the language selector and the language is the site\'s default language.');
87 88 89 90 91 92 93 94
  }
}

/**
 * Implements hook_theme().
 */
function language_theme() {
  return array(
95 96
    'language_negotiation_configure_form' => array(
      'render element' => 'form',
97
      'file' => 'language.admin.inc',
98
      'template' => 'language-negotiation-configure-form',
99
    ),
100 101 102 103
    'language_negotiation_configure_browser_form_table' => array(
      'render element' => 'form',
      'file' => 'language.admin.inc',
    ),
104 105 106 107
    'language_content_settings_table' => array(
      'render element' => 'element',
      'file' => 'language.admin.inc',
    ),
108 109 110
  );
}

111 112 113 114 115 116 117 118 119 120 121 122 123
/**
 * Implements hook_element_info_alter().
 */
function language_element_info_alter(&$type) {
  // Alter the language_select element so that it will be rendered like a select
  // field.
  if (isset($type['language_select'])) {
    if (!isset($type['language_select']['#process'])) {
      $type['language_select']['#process'] = array();
    }
    if (!isset($type['language_select']['#theme_wrappers'])) {
      $type['language_select']['#theme_wrappers'] = array();
    }
124 125 126 127 128
    $type['language_select']['#process'] = array_merge($type['language_select']['#process'], array(
      'language_process_language_select',
      array('Drupal\Core\Render\Element\Select', 'processSelect'),
      array('Drupal\Core\Render\Element\RenderElement', 'processAjaxForm'),
    ));
129 130
    $type['language_select']['#theme'] = 'select';
    $type['language_select']['#theme_wrappers'] = array_merge($type['language_select']['#theme_wrappers'], array('form_element'));
131
    $type['language_select']['#languages'] = LanguageInterface::STATE_CONFIGURABLE;
132 133 134 135 136 137 138 139 140 141 142 143 144 145
    $type['language_select']['#multiple'] = FALSE;
  }
}

/**
 * Processes a language select list form element.
 *
 * @param array $element
 *   The form element to process.
 *
 * @return array $element
 *   The processed form element.
 */
function language_process_language_select($element) {
146
  // Don't set the options if another module (translation for example) already
147 148 149
  // set the options.
  if (!isset($element['#options'])) {
    $element['#options'] = array();
150
    foreach (\Drupal::languageManager()->getLanguages($element['#languages']) as $langcode => $language) {
151 152 153
      $element['#options'][$langcode] = $language->locked ? t('- @name -', array('@name' => $language->name)) : $language->name;
    }
  }
154 155 156 157 158 159 160 161 162 163 164 165 166 167 168
  // Add "Built-in English" language to the select when the default value is
  // set to English but it does not exist in the options list.
  //
  // Drupal core includes configuration shipped in English, including default
  // views, content types, user roles, filter formats, etc. To keep the Drupal
  // software update-able, as well as translations update-able, we keep these
  // configuration files in English even when installed in a foreign language.
  // However, administrators can remove English, in which case editing such a
  // configuration would lead to the language settings being changed on it. We
  // avoid that by including this option and letting administrators keep it
  // in English.
  if (isset($element['#default_value']) && $element['#default_value'] == 'en' && !isset($element['#options']['en'])) {
    // Prepend the default language at the beginning of the list.
    $element['#options'] = array('en' => t('Built-in English')) + $element['#options'];
  }
169 170 171
  return $element;
}

172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190
/**
 * Implements hook_element_info().
 */
function language_element_info() {
  $types['language_configuration'] = array(
    '#input' => TRUE,
    '#tree' => TRUE,
    '#process' => array('language_configuration_element_process'),
  );
  return $types;
}

/**
 * Returns the default options for the language configuration form element.
 *
 * @return array
 *   An array containing the default options.
 */
function language_configuration_element_default_options() {
191
  $language_options = array(
192
    'site_default' => t("Site's default language (!language)", array('!language' => \Drupal::languageManager()->getDefaultLanguage()->name)),
193 194 195
    'current_interface' => t('Current interface language'),
    'authors_default' => t("Author's preferred language"),
  );
196

197
  $languages = \Drupal::languageManager()->getLanguages(LanguageInterface::STATE_ALL);
198 199 200 201 202 203 204 205 206 207
  foreach ($languages as $langcode => $language) {
    $language_options[$langcode] = $language->locked ? t('- @name -', array('@name' => $language->name)) : $language->name;
  }

  return $language_options;
}

/**
 * Process handler for the language_configuration form element.
 */
208
function language_configuration_element_process($element, FormStateInterface $form_state, &$form) {
209 210 211 212 213 214 215 216 217 218 219 220
  $options = isset($element['#options']) ? $element['#options'] : array();
  // Avoid validation failure since we are moving the '#options' key in the
  // nested 'language' select element.
  unset($element['#options']);
  $element['langcode'] = array(
    '#type' => 'select',
    '#title' => t('Default language'),
    '#options' => $options + language_configuration_element_default_options(),
    '#description' => t('Explanation of the language options is found on the <a href="@languages_list_page">languages list page</a>.', array('@languages_list_page' => url('admin/config/regional/language'))),
    '#default_value' => isset($element['#default_value']['langcode']) ? $element['#default_value']['langcode'] : NULL,
  );

221
  $element['language_show'] = array(
222
    '#type' => 'checkbox',
223 224
    '#title' => t('Show language selector on create and edit pages'),
    '#default_value' => isset($element['#default_value']['language_show']) ? $element['#default_value']['language_show'] : NULL,
225 226 227 228 229 230
  );

  // Add the entity type and bundle information to the form if they are set.
  // They will be used, in the submit handler, to generate the names of the
  // variables that will store the settings and are a way to uniquely identify
  // the entity.
231 232 233
  $language = $form_state->get('language') ?: [];
  $language += [
    $element['#name'] => [
234 235
      'entity_type' => $element['#entity_information']['entity_type'],
      'bundle' => $element['#entity_information']['bundle'],
236 237 238
    ],
  ];
  $form_state->set('language', $language);
239

240 241
  // Do not add the submit callback for the language content settings page,
  // which is handled separately.
242
  if ($form['#form_id'] != 'language_content_settings_form') {
243 244 245 246 247 248 249 250 251
    // Determine where to attach the language_configuration element submit handler.
    // @todo Form API: Allow form widgets/sections to declare #submit handlers.
    if (isset($form['actions']['submit']['#submit']) && array_search('language_configuration_element_submit', $form['actions']['submit']['#submit']) === FALSE) {
      $form['actions']['submit']['#submit'][] = 'language_configuration_element_submit';
    }
    elseif (array_search('language_configuration_element_submit', $form['#submit']) === FALSE) {
      $form['#submit'][] = 'language_configuration_element_submit';
    }
  }
252 253 254 255 256 257
  return $element;
}

/**
 * Submit handler for the forms that have a language_configuration element.
 */
258
function language_configuration_element_submit(&$form, FormStateInterface $form_state) {
259 260
  // Iterate through all the language_configuration elements and save their
  // values.
261 262
  if ($language = $form_state->get('language')) {
    foreach ($language as $element_name => $values) {
263
      language_save_default_configuration($values['entity_type'], $values['bundle'],  $form_state->getValue($element_name));
264 265 266 267 268 269 270 271 272 273 274 275 276 277
    }
  }
}

/**
 * Saves a language configuration that is attached to an entity type and bundle.
 *
 * @param string $entity_type
 *   A string representing the entity type.
 * @param string $bundle
 *   A string representing the bundle.
 * @param array $values
 *   An array holding the values to be saved having the following keys:
 *   - langcode: the language code.
278
 *   - language_show: if the language element should be hidden or not.
279 280
 */
function language_save_default_configuration($entity_type, $bundle, $values = array()) {
281
  \Drupal::config('language.settings')->set(language_get_default_configuration_settings_key($entity_type, $bundle), array('langcode' => $values['langcode'], 'language_show' => $values['language_show']))->save();
282 283 284 285 286 287 288 289 290 291 292 293 294
}

/**
 * Returns the language configuration stored for an entity type and bundle.
 *
 * @param string $entity_type
 *   A string representing the entity type.
 * @param string $bundle
 *   A string representing the bundle.
 *
 * @return array
 *   An array with the following keys:
 *   - langcode: the language code.
295
 *   - language_show: if the language element is hidden or not.
296 297
 */
function language_get_default_configuration($entity_type, $bundle) {
298
  $configuration = \Drupal::config('language.settings')->get(language_get_default_configuration_settings_key($entity_type, $bundle));
299 300 301
  if (is_null($configuration)) {
    $configuration = array();
  }
302
  $configuration += array('langcode' => 'site_default', 'language_show' => FALSE);
303 304 305 306 307 308 309 310 311 312 313 314
  return $configuration;
}

/**
 * Clears the default language configuration for an entity type and bundle.
 *
 * @param string $entity_type
 *   A string representing the entity type.
 * @param string $bundle
 *   A string representing the bundle.
 */
function language_clear_default_configuration($entity_type, $bundle) {
315
  \Drupal::config('language.settings')->clear(language_get_default_configuration_settings_key($entity_type, $bundle))->save();
316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335
}

/**
 * Returns the root name of the variables used to store the configuration.
 *
 * Based on the entity type and bundle, the variables used to store the
 * configuration will have a common root name.
 *
 * @param string $entity_type
 *   A string representing the entity type.
 * @param string $bundle
 *   A string representing the bundle.
 *
 * @return string
 *   The root name of the variables.
 */
function language_get_default_configuration_settings_key($entity_type, $bundle) {
  // Replace all the characters that are not letters, numbers or "_" with "_".
  $entity_type = preg_replace('/[^0-9a-zA-Z_]/', "_", $entity_type);
  $bundle = preg_replace('/[^0-9a-zA-Z_]/', "_", $bundle);
336
  return 'entities.' . $entity_type . '.' . $bundle . '.language.default_configuration';
337 338 339
}

/**
340
 * Implements hook_ENTITY_TYPE_update() for node_type entities.
341
 */
342 343 344 345
function language_node_type_update(NodeTypeInterface $type) {
  if ($type->original->id() != $type->id()) {
    language_save_default_configuration('node', $type->id(), language_get_default_configuration('node', $type->original->id()));
    language_clear_default_configuration('node', $type->original->id());
346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367
  }
}

/**
 * Returns the default language code assigned to an entity type and a bundle.
 *
 * @param string $entity_type
 *   The entity type.
 * @param string $bundle
 *   The bundle name.
 *
 * @return string
 *   The language code.
 */
function language_get_default_langcode($entity_type, $bundle) {
  $configuration = language_get_default_configuration($entity_type, $bundle);

  if (!isset($configuration['langcode'])) {
    $configuration['langcode'] = 'site_default';
  }

  $default_value = NULL;
368
  $language_interface = \Drupal::languageManager()->getCurrentLanguage();
369 370
  switch ($configuration['langcode']) {
    case 'site_default':
371
      $default_value = \Drupal::languageManager()->getDefaultLanguage()->id;
372 373 374
      break;

    case 'current_interface':
375
      $default_value = $language_interface->id;
376 377 378
      break;

    case 'authors_default':
379
      $user = \Drupal::currentUser();
380 381 382
      $language_code = $user->getPreferredLangcode();
      if (!empty($language_code)) {
        $default_value = $language_code;
383 384
      }
      else {
385
        $default_value = $language_interface->id;
386 387 388 389 390 391 392 393 394 395 396 397
      }
      break;
  }
  if ($default_value) {
    return $default_value;
  }

  // If we still do not have a default value, just return the value stored in
  // the configuration; it has to be an actual language code.
  return $configuration['langcode'];
}

398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413
/**
 * Implements hook_language_types_info().
 *
 * Defines the three core language types:
 * - Interface language is the only configurable language type in core. It is
 *   used by t() as the default language if none is specified.
 * - Content language is by default non-configurable and inherits the interface
 *   language negotiated value. It is used by the Field API to determine the
 *   display language for fields if no explicit value is specified.
 * - URL language is by default non-configurable and is determined through the
 *   URL language negotiation method or the URL fallback language negotiation
 *   method if no language can be detected. It is used by l() as the default
 *   language if none is specified.
 */
function language_language_types_info() {
  return array(
414
    LanguageInterface::TYPE_INTERFACE => array(
415 416
      'name' => t('User interface text'),
      'description' => t('Order of language detection methods for user interface text. If a translation of user interface text is available in the detected language, it will be displayed.'),
417
      'locked' => TRUE,
418
    ),
419
    LanguageInterface::TYPE_CONTENT => array(
420 421
      'name' => t('Content'),
      'description' => t('Order of language detection methods for content. If a version of content is available in the detected language, it will be displayed.'),
422
      'fixed' => array(LanguageNegotiationUI::METHOD_ID),
423
      'locked' => TRUE,
424
    ),
425
    LanguageInterface::TYPE_URL => array(
426
      'fixed' => array(LanguageNegotiationUrl::METHOD_ID, LanguageNegotiationUrlFallback::METHOD_ID),
427
      'locked' => TRUE,
428 429 430 431 432
    ),
  );
}

/**
433
 * Reads language prefixes and uses the langcode if no prefix is set.
434
 */
435 436 437
function language_negotiation_url_prefixes() {
  return \Drupal::config('language.negotiation')->get('url.prefixes');
}
438

439 440 441 442 443
/**
 * Update the list of prefixes from the installed languages.
 */
function language_negotiation_url_prefixes_update() {
  $prefixes = language_negotiation_url_prefixes();
444
  foreach (\Drupal::languageManager()->getLanguages() as $language) {
445 446
    // The prefix for this language should be updated if it's not assigned yet
    // or the prefix is set to the empty string.
447
    if (empty($prefixes[$language->getId()])) {
448 449
      // For the default language, set the prefix to the empty string,
      // otherwise use the langcode.
450
      $prefixes[$language->getId()] = $language->isDefault() ? '' : $language->id;
451 452 453 454 455
    }
    // Otherwise we keep the configured prefix.
  }
  language_negotiation_url_prefixes_save($prefixes);
}
456

457 458 459 460 461 462 463 464
/**
 * Saves language prefix settings.
 */
function language_negotiation_url_prefixes_save(array $prefixes) {
  \Drupal::config('language.negotiation')
  ->set('url.prefixes', $prefixes)
  ->save();
}
465

466 467 468 469 470
/**
 * Reads language domains.
 */
function language_negotiation_url_domains() {
  return \Drupal::config('language.negotiation')->get('url.domains');
471 472 473
}

/**
474
 * Saves the language domain settings.
475
 */
476 477 478 479
function language_negotiation_url_domains_save(array $domains) {
  \Drupal::config('language.negotiation')
  ->set('url.domains', $domains)
  ->save();
480 481 482
}

/**
483
 * Implements hook_modules_installed().
484
 */
485
function language_modules_installed($modules) {
486 487 488 489 490
  if (!in_array('language', $modules)) {
    $negotiator = \Drupal::service('language_negotiator');
    $negotiator->updateConfiguration(array());
    $negotiator->purgeConfiguration();
  }
491 492 493
}

/**
494
 * Implements hook_modules_uninstalled().
495
 */
496 497
function language_modules_uninstalled($modules) {
  language_modules_installed($modules);
498 499 500
}

/**
501
 * Implements hook_ENTITY_TYPE_insert() for 'configurable_language'.
502
 */
503
function language_configurable_language_insert(ConfigurableLanguage $language) {
504 505 506 507
  if (!empty($language->locked)) {
    return;
  }

508 509
  // Add language to the list of language domains.
  $domains = language_negotiation_url_domains();
510
  $domains[$language->id()] = '';
511 512 513 514
  language_negotiation_url_domains_save($domains);
}

/**
515
 * Implements hook_ENTITY_TYPE_delete() for 'configurable_language'.
516
 */
517
function language_configurable_language_delete(ConfigurableLanguage $language) {
518 519
  // Remove language from language prefix list.
  $prefixes = language_negotiation_url_prefixes();
520
  unset($prefixes[$language->id()]);
521 522 523 524
  language_negotiation_url_prefixes_save($prefixes);

  // Remove language from language domain list.
  $domains = language_negotiation_url_domains();
525
  unset($domains[$language->id()]);
526 527 528 529
  language_negotiation_url_domains_save($domains);
}

/**
530
 * Implements hook_preprocess_HOOK() for block templates.
531 532
 */
function language_preprocess_block(&$variables) {
533
  if ($variables['configuration']['provider'] == 'language') {
534
    $variables['attributes']['role'] = 'navigation';
535 536 537
  }
}

538 539 540 541 542 543 544 545
/**
 * Returns language mappings between browser and Drupal language codes.
 *
 * @return array
 *   An array containing browser language codes as keys with corresponding
 *   Drupal language codes as values.
 */
function language_get_browser_drupal_langcode_mappings() {
546
  $config = \Drupal::config('language.mappings');
547 548 549 550 551 552 553 554 555 556 557 558 559 560
  if ($config->isNew()) {
    return array();
  }
  return $config->get();
}

/**
 * Stores language mappings between browser and Drupal language codes.
 *
 * @param array $mappings
 *   An array containing browser language codes as keys with corresponding
 *   Drupal language codes as values.
 */
function language_set_browser_drupal_langcode_mappings($mappings) {
561
  $config = \Drupal::config('language.mappings');
562 563 564
  $config->setData($mappings);
  $config->save();
}
565

566 567 568 569 570
/**
 * Implements hook_form_FORM_ID_alter for system_regional_settings().
 *
 * @see language_system_regional_settings_form_submit()
 */
571
function language_form_system_regional_settings_alter(&$form, FormStateInterface $form_state) {
572 573
  $languages = \Drupal::languageManager()->getLanguages();
  $default = \Drupal::languageManager()->getDefaultLanguage();
574 575 576 577 578 579
  foreach ($languages as $key => $language) {
    $language_options[$key] = $language->name;
  }
  $form['locale']['site_default_language'] = array(
    '#type' => 'select',
    '#title' => t('Default language'),
580
    '#default_value' => $default->id,
581 582 583 584 585 586 587 588 589 590 591 592 593
    '#options' => $language_options,
    '#description' => t('It is not recommended to change the default language on a working site. <a href="@language-detection">Configure the Selected language</a> setting on the detection and selection page to change the fallback language for language selection.', array('@language-detection' => url('admin/config/regional/language/detection'))),
    '#weight' => -1,
  );
  // Add submit handler to save default language.
  $form['#submit'][] = 'language_system_regional_settings_form_submit';
}

/**
 * Form submission handler for system_regional_settings().
 *
 * @see language_form_system_regional_settings_alter()
 */
594
function language_system_regional_settings_form_submit($form, FormStateInterface $form_state) {
595
  \Drupal::config('system.site')->set('langcode', $form_state->getValue('site_default_language'))->save();
596
}
597 598 599 600 601 602 603 604

/**
 * Implements hook_field_info_alter().
 */
function language_field_info_alter(&$info) {
  // Change the default behavior of language field.
  $info['language']['class'] = '\Drupal\language\DefaultLanguageItem';
}