content_translation.module 40.2 KB
Newer Older
1 2 3 4 5 6 7
<?php

/**
 * @file
 * Allows entities to be translated into different languages.
 */

8
use Drupal\content_translation\Plugin\Derivative\ContentTranslationLocalTasks;
9
use Drupal\Core\Entity\ContentEntityInterface;
10 11
use Drupal\Core\Entity\EntityFormControllerInterface;
use Drupal\Core\Entity\EntityInterface;
12 13 14
use Drupal\Core\Language\Language;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\TypedData\TranslatableInterface;
15 16 17 18

/**
 * Implements hook_help().
 */
19
function content_translation_help($path, $arg) {
20
  switch ($path) {
21
    case 'admin/help#content_translation':
22 23
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
24
      $output .= '<p>' . t('The Content Translation module allows you to create and manage translations for your Drupal site content. You can specify which elements need to be translated at the content-type level for content items and comments, at the vocabulary level for taxonomy terms, and at the site level for user accounts. Other modules may provide additional elements that can be translated. For more information, see the online handbook entry for <a href="!url">Content Translation</a>.', array('!url' => 'http://drupal.org/documentation/modules/translation_entity')) . '</p>';
25 26 27
      $output .= '<h3>' . t('Uses') . '</h3>';
      $output .= '<dl>';
      $output .= '<dt>' . t('Enabling translation') . '</dt>';
28
      $output .= '<dd><p>' . t('Before you can translate content, there must be at least two languages added on the <a href="!url">languages administration</a> page.', array('!url' => url('admin/config/regional/language'))) . '</p>';
29
      $output .= '<p>' . t('After adding languages, <a href="!url">configure translation</a>.', array('!url' => url('admin/config/regional/content-language'))) . '</p>';
30
      $output .= '<dt>' . t('Translating content') . '</dt>';
31
      $output .= '<dd>' . t('After enabling translation you can create a new piece of content, or edit existing content and assign it a language. Then, you will see a <em>Translate</em> tab or link that will gives an overview of the translation status for the current content. From there, you can add translations and edit or delete existing translations. This process is similar for every translatable element on your site, such as taxonomy terms, comments or user accounts.') . '</dd>';
32 33 34 35 36
      $output .= '<dt>' . t('Changing source language') . '</dt>';
      $output .= '<dd>' . t('When there are two or more possible source languages, selecting a <em>Source language</em> will repopulate the form using the specified source\'s values. For example, French is much closer to Spanish than to Chinese, so changing the French translation\'s source language to Spanish can assist translators.') . '</dd>';
      $output .= '<dt>' . t('Maintaining translations') . '</dt>';
      $output .= '<dd>' . t('If editing content in one language requires that translated versions also be updated to reflect the change, use the <em>Flag other translations as outdated</em> check box to mark the translations as outdated and in need of revision.') . '</dd>';
      $output .= '<dt>' . t('Translation permissions') . '</dt>';
37
      $output .= '<dd>' . t('The Content Translation module makes a basic set of permissions available. Additional <a href="@permissions">permissions</a> are made available after translation is enabled for each translatable element.', array('@permissions' => url('admin/people/permissions', array('fragment' => 'module-content_translation')))) . '</dd>';
38 39
      $output .= '</dl>';
      return $output;
40 41 42 43

    case 'admin/config/regional/content-language':
      $output = '';
      if (!language_multilingual()) {
44
        $output .= '<br/>' . t('Before you can translate content, there must be at least two languages added on the <a href="!url">languages administration</a> page.', array('!url' => url('admin/config/regional/language')));
45 46
      }
      return $output;
47 48 49
  }
}

50 51 52
/**
 * Implements hook_module_implements_alter().
 */
53
function content_translation_module_implements_alter(&$implementations, $hook) {
54 55 56 57
  switch ($hook) {
    // Move some of our hook implementations to the end of the list.
    case 'menu_alter':
    case 'entity_info_alter':
58 59 60
      $group = $implementations['content_translation'];
      unset($implementations['content_translation']);
      $implementations['content_translation'] = $group;
61 62 63 64
      break;
  }
}

65 66 67
/**
 * Implements hook_language_type_info_alter().
 */
68
function content_translation_language_types_info_alter(array &$language_types) {
69 70 71
  // Make content language negotiation configurable by removing the 'locked'
  // flag.
  $language_types[Language::TYPE_CONTENT]['locked'] = FALSE;
72
  unset($language_types[Language::TYPE_CONTENT]['fixed']);
73 74 75 76 77
}

/**
 * Implements hook_entity_info_alter().
 */
78
function content_translation_entity_info_alter(array &$entity_info) {
79 80
  // Provide defaults for translation info.
  foreach ($entity_info as $entity_type => &$info) {
81 82 83 84
    if (empty($info['translatable'])) {
      continue;
    }

85 86
    if (!isset($info['translation']['content_translation'])) {
      $info['translation']['content_translation'] = array();
87 88 89 90 91 92
    }

    // Every fieldable entity type must have a translation controller class, no
    // matter if it is enabled for translation or not. As a matter of fact we
    // might need it to correctly switch field translatability when a field is
    // shared accross different entities.
93
    $info['controllers'] += array('translation' => 'Drupal\content_translation\ContentTranslationController');
94

95 96 97 98 99
    // If no menu base path is provided we default to the usual
    // "entity_type/%entity_type" pattern.
    if (!isset($info['menu_base_path'])) {
      $path = "$entity_type/%$entity_type";
      $info['menu_base_path'] = $path;
100 101
    }

102
    $path = $info['menu_base_path'];
103

104 105 106 107 108
    $info += array(
      'menu_view_path' => $path,
      'menu_edit_path' => "$path/edit",
      'menu_path_wildcard' => "%$entity_type",
    );
109

110
    $entity_position = count(explode('/', $path)) - 1;
111 112
    $info['translation']['content_translation'] += array(
      'access_callback' => 'content_translation_translate_access',
113 114 115 116
      'access_arguments' => array($entity_position),
    );
  }
}
117

118 119 120
/**
 * Implements hook_entity_bundle_info_alter().
 */
121
function content_translation_entity_bundle_info_alter(&$bundles) {
122 123
  foreach ($bundles as $entity_type => &$info) {
    foreach ($info as $bundle => &$bundle_info) {
124
      $enabled = content_translation_get_config($entity_type, $bundle, 'enabled');
125
      $bundle_info['translatable'] = !empty($enabled);
126 127 128 129
    }
  }
}

130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156
/**
 * Implements hook_entity_field_info_alter().
 */
function content_translation_entity_field_info_alter(&$info, $entity_type) {
  $translation_settings = config('content_translation.settings')->get($entity_type);

  if ($translation_settings) {
    // Currently field translatability is defined per-field but we may want to
    // make it per-instance instead, so leaving the possibility open for further
    // easier refactoring.
    $fields = array();
    foreach ($translation_settings as $bundle => $settings) {
      $fields += !empty($settings['content_translation']['fields']) ? $settings['content_translation']['fields'] : array();
    }

    $keys = array('definitions', 'optional');
    foreach ($fields as $name => $translatable) {
      foreach ($keys as $key) {
        if (isset($info[$key][$name])) {
          $info[$key][$name]['translatable'] = (bool) $translatable;
          break;
        }
      }
    }
  }
}

157 158 159
/**
 * Implements hook_menu().
 */
160
function content_translation_menu() {
161 162 163 164 165
  $items = array();

  // Create tabs for all possible entity types.
  foreach (entity_get_info() as $entity_type => $info) {
    // Provide the translation UI only for enabled types.
166
    if (content_translation_enabled($entity_type)) {
167 168 169
      $path = $info['menu_base_path'];
      $entity_position = count(explode('/', $path)) - 1;
      $keys = array_flip(array('theme_callback', 'theme_arguments', 'access_callback', 'access_arguments', 'load_arguments'));
170
      $menu_info = array_intersect_key($info['translation']['content_translation'], $keys) + array('file' => 'content_translation.pages.inc');
171 172 173 174 175 176 177 178 179
      $item = array();

      // Plugin annotations cannot contain spaces, thus we need to restore them
      // from underscores.
      foreach ($menu_info as $key => $value) {
        $item[str_replace('_', ' ', $key)] = $value;
      }

      $items["$path/translations"] = array(
180
        'title' => 'Translate',
181
        'route_name' => "content_translation.translation_overview_$entity_type",
182
        'type' => MENU_LOCAL_TASK,
183
        'context' => MENU_CONTEXT_PAGE,
184 185 186
        'weight' => 2,
      ) + $item;

187 188 189 190 191 192
      $items["$path/translations/overview"] = array(
        'title' => 'Overview',
        'type' => MENU_DEFAULT_LOCAL_TASK,
        'weight' => 0,
      );

193 194 195 196 197
      // Add translation callback.
      // @todo Add the access callback instead of replacing it as soon as the
      // routing system supports multiple callbacks.
      $language_position = $entity_position + 3;
      $args = array($entity_position, $language_position, $language_position + 1);
198
      $items["$path/translations/add/%language/%language"] = array(
199
        'title' => 'Add',
200
        'route_name' => "content_translation.translation_add_$entity_type",
201
        'weight' => 1,
202
      );
203 204 205 206 207

      // Edit translation callback.
      $args = array($entity_position, $language_position);
      $items["$path/translations/edit/%language"] = array(
        'title' => 'Edit',
208
        'route_name' => "content_translation.translation_edit_$entity_type",
209
        'weight' => 1,
210
      );
211 212 213 214

      // Delete translation callback.
      $items["$path/translations/delete/%language"] = array(
        'title' => 'Delete',
215
        'route_name' => "content_translation.delete_$entity_type",
216 217 218 219
      ) + $item;
    }
  }

220
  $items['admin/config/regional/content_translation/translatable/%/%'] = array(
221 222
    'title' => 'Confirm change in translatability.',
    'description' => 'Confirm page for changing field translatability.',
223
    'route_name' => 'content_translation.translatable',
224 225 226 227 228 229 230 231
  );

  return $items;
}

/**
 * Implements hook_menu_alter().
 */
232
function content_translation_menu_alter(array &$items) {
233 234 235 236
  // Clarify where translation settings are located.
  $items['admin/config/regional/content-language']['title'] = 'Content language and translation';
  $items['admin/config/regional/content-language']['description'] = 'Configure language and translation support for content.';

237 238
  // Check that the declared menu base paths are actually valid.
  foreach (entity_get_info() as $entity_type => $info) {
239
    if (content_translation_enabled($entity_type)) {
240 241
      $path = $info['menu_base_path'];

242 243 244 245
      // If the base path is not defined we cannot provide the translation UI
      // for this entity type. In some cases the actual base path might not have
      // a menu loader associated, hence we need to check also for the plain "%"
      // variant. See for instance comment_menu().
246
      if (!isset($items[$path]) && !isset($items["$path/edit"])
247
          && !isset($items[_content_translation_menu_strip_loaders($path)])) {
248 249
        unset(
          $items["$path/translations"],
250
          $items["$path/translations/add/%language/%language"],
251 252
          $items["$path/translations/delete/%language"]
        );
253
        $t_args = array('@entity_type' => isset($info['label']) ? $info['label'] : $entity_type);
254
        watchdog('content translation', 'The entities of type @entity_type do not define a valid base path: it will not be possible to translate them.', $t_args, WATCHDOG_WARNING);
255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279
      }
      else {
        $entity_position = count(explode('/', $path)) - 1;
        $edit_path = $info['menu_edit_path'];

        if (isset($items[$edit_path])) {
          // If the edit path is a default local task we need to find the parent
          // item.
          $edit_path_split = explode('/', $edit_path);
          do {
            $entity_form_item = &$items[implode('/', $edit_path_split)];
            array_pop($edit_path_split);
          }
          while (!empty($entity_form_item['type']) && $entity_form_item['type'] == MENU_DEFAULT_LOCAL_TASK);

          // Make the "Translate" tab follow the "Edit" one when possibile.
          if (isset($entity_form_item['weight'])) {
            $items["$path/translations"]['weight'] = $entity_form_item['weight'] + 0.01;
          }
        }
      }
    }
  }
}

280 281 282 283 284 285 286 287 288
/**
 * Implements hook_local_tasks_alter().
 */
function content_translation_local_tasks_alter(&$local_tasks) {
  // Alters in tab_root_id onto the content translation local task.
  $derivative = ContentTranslationLocalTasks::create(\Drupal::getContainer(), 'content_translation.local_tasks');
  $derivative->alterLocalTasks($local_tasks);
}

289 290 291 292 293 294 295 296 297
/**
 * Strips out menu loaders from the given path.
 *
 * @param string $path
 *   The path to process.
 *
 * @return
 *   The given path where all the menu loaders are replaced with "%".
 */
298
function _content_translation_menu_strip_loaders($path) {
299 300 301
  return preg_replace('|%[^/]+|', '%', $path);
}

302 303 304 305 306 307
/**
 * Access callback for the translation overview page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity whose translation overview should be displayed.
 */
308
function content_translation_translate_access(EntityInterface $entity) {
309
  return $entity instanceof ContentEntityInterface && empty($entity->getUntranslated()->language()->locked) && language_multilingual() && $entity->isTranslatable() &&
310
    (user_access('create content translations') || user_access('update content translations') || user_access('delete content translations'));
311 312
}

313 314 315 316 317 318 319
/**
 * Checks whether the given user can view the specified translation.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity whose translation overview should be displayed.
 * @param $langcode
 *   The language code of the translation to be displayed.
320
 * @param \Drupal\Core\Session\AccountInterface $account
321 322 323
 *   (optional) The account for which view access should be checked. Defaults to
 *   the current user.
 */
324
function content_translation_view_access(EntityInterface $entity, $langcode, AccountInterface $account = NULL) {
325
  $entity_type = $entity->entityType();
326 327 328 329 330 331
  $info = $entity->entityInfo();
  $permission = "translate $entity_type";
  if (!empty($info['permission_granularity']) && $info['permission_granularity'] == 'bundle') {
    $permission = "translate {$entity->bundle()} $entity_type";
  }
  return !empty($entity->translation[$langcode]['status']) || user_access('translate any entity', $account) || user_access($permission, $account);
332 333
}

334 335 336 337 338 339
/**
 * Access callback for the translation addition page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity being translated.
 * @param \Drupal\Core\Language\Language $source
340 341
 *   (optional) The language of the values being translated. Defaults to the
 *   entity language.
342
 * @param \Drupal\Core\Language\Language $target
343 344
 *   (optional) The language of the translated values. Defaults to the current
 *   content language.
345
 */
346
function content_translation_add_access(EntityInterface $entity, Language $source = NULL, Language $target = NULL) {
347
  $source = !empty($source) ? $source : $entity->language();
348
  $target = !empty($target) ? $target : language(Language::TYPE_CONTENT);
349 350
  $translations = $entity->getTranslationLanguages();
  $languages = language_list();
351
  return $source->id != $target->id && isset($languages[$source->id]) && isset($languages[$target->id]) && !isset($translations[$target->id]) && content_translation_access($entity, 'create');
352 353 354 355 356 357 358 359 360 361 362
}

/**
 * Access callback for the translation edit page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity being translated.
 * @param \Drupal\Core\Language\Language $language
 *   (optional) The language of the translated values. Defaults to the current
 *   content language.
 */
363
function content_translation_edit_access(EntityInterface $entity, Language $language = NULL) {
364
  $language = !empty($language) ? $language : language(Language::TYPE_CONTENT);
365 366
  $translations = $entity->getTranslationLanguages();
  $languages = language_list();
367
  return isset($languages[$language->id]) && $language->id != $entity->getUntranslated()->language()->id && isset($translations[$language->id]) && content_translation_access($entity, 'update');
368 369 370 371 372 373 374 375 376 377 378
}

/**
 * Access callback for the translation delete page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity being translated.
 * @param \Drupal\Core\Language\Language $language
 *   (optional) The language of the translated values. Defaults to the current
 *   content language.
 */
379
function content_translation_delete_access(EntityInterface $entity, Language $language = NULL) {
380
  $language = !empty($language) ? $language : language(Language::TYPE_CONTENT);
381 382
  $translations = $entity->getTranslationLanguages();
  $languages = language_list();
383
  return isset($languages[$language->id]) && $language->id != $entity->getUntranslated()->language()->id && isset($translations[$language->id]) && content_translation_access($entity, 'delete');
384 385
}

386 387 388
/**
 * Implements hook_library_info().
 */
389 390 391 392
function content_translation_library_info() {
  $path = drupal_get_path('module', 'content_translation');
  $libraries['drupal.content_translation.admin'] = array(
    'title' => 'Content translation UI',
393
    'version' => \Drupal::VERSION,
394
    'js' => array(
395
      $path . '/content_translation.admin.js' => array(),
396 397
    ),
    'css' => array(
398
      $path . '/css/content_translation.admin.css' => array(),
399 400 401 402 403 404 405 406 407 408 409
    ),
    'dependencies' => array(
      array('system', 'jquery'),
      array('system', 'drupal'),
      array('system', 'jquery.once'),
    ),
  );

  return $libraries;
}

410
/**
411
 * Returns the key name used to store the configuration setting.
412
 *
413 414
 * Based on the entity type and bundle, the keys used to store configuration
 * will have a common root name.
415 416 417 418 419 420 421 422 423
 *
 * @param string $entity_type
 *   The type of the entity the setting refers to.
 * @param string $bundle
 *   The bundle of the entity the setting refers to.
 * @param string $setting
 *   The name of the setting.
 *
 * @return string
424
 *   The key name of the configuration setting.
425 426 427 428
 *
 * @todo Generalize this logic so that it is available to any module needing
 *   per-bundle configuration.
 */
429
function content_translation_get_config_key($entity_type, $bundle, $setting) {
430 431
  $entity_type = preg_replace('/[^0-9a-zA-Z_]/', "_", $entity_type);
  $bundle = preg_replace('/[^0-9a-zA-Z_]/', "_", $bundle);
432
  return $entity_type . '.' . $bundle . '.content_translation.' . $setting;
433 434 435 436 437 438 439 440 441 442 443 444 445 446 447
}

/**
 * Retrieves the value for the specified setting.
 *
 * @param string $entity_type
 *   The type of the entity the setting refer to.
 * @param string $bundle
 *   The bundle of the entity the setting refer to.
 * @param string $setting
 *   The name of the setting.
 *
 * @returns mixed
 *   The stored value for the given setting.
 */
448 449
function content_translation_get_config($entity_type, $bundle, $setting) {
  $key = content_translation_get_config_key($entity_type, $bundle, $setting);
450
  return \Drupal::config('content_translation.settings')->get($key);
451 452 453 454 455 456 457 458 459 460 461 462 463 464
}

/**
 * Stores the given value for the specified setting.
 *
 * @param string $entity_type
 *   The type of the entity the setting refer to.
 * @param string $bundle
 *   The bundle of the entity the setting refer to.
 * @param string $setting
 *   The name of the setting.
 * @param $value
 *   The value to be stored for the given setting.
 */
465 466
function content_translation_set_config($entity_type, $bundle, $setting, $value) {
  $key = content_translation_get_config_key($entity_type, $bundle, $setting);
467
  return \Drupal::config('content_translation.settings')->set($key, $value)->save();
468 469 470 471 472 473 474 475 476 477 478 479 480 481 482
}

/**
 * Determines whether the given entity type is translatable.
 *
 * @param string $entity_type
 *   The type of the entity.
 * @param string $bundle
 *   (optional) The bundle of the entity. If no bundle is provided, all the
 *   available bundles are checked.
 *
 * @returns
 *   TRUE if the specified bundle is translatable. If no bundle is provided
 *   returns TRUE if at least one of the entity bundles is translatable.
 */
483
function content_translation_enabled($entity_type, $bundle = NULL) {
484
  $enabled = FALSE;
485
  $info = entity_get_info($entity_type);
486

487 488 489
  if (!empty($info['translatable'])) {
    $bundles = !empty($bundle) ? array($bundle) : array_keys(entity_get_bundles($entity_type));
    foreach ($bundles as $bundle) {
490
      if (content_translation_get_config($entity_type, $bundle, 'enabled')) {
491 492 493
        $enabled = TRUE;
        break;
      }
494 495 496
    }
  }

497
  return $enabled;
498 499
}

500 501 502 503 504 505
/**
 * Returns all the translatable entity types.
 *
 * @return array
 *   An array of entity types keyed by entity type.
 */
506
function content_translation_types_translatable() {
507 508 509
  $entity_types = &drupal_static(__FUNCTION__, array());

  foreach (entity_get_info() as $entity_type => $info) {
510
    if (content_translation_enabled($entity_type)) {
511 512 513 514 515 516 517
      // Lazy load router items.
      if (!isset($items)) {
        $items = menu_get_router();
      }
      // Check whether the required paths are defined. We need to strip out the
      // menu loader and replace it with a plain "%" as router items have no
      // menu loader in them.
518
      $path = _content_translation_menu_strip_loaders($info['menu_base_path']);
519 520 521 522 523 524 525 526 527
      if (!empty($items[$path]) && !empty($items[$path . '/translations'])) {
        $entity_types[$entity_type] = $entity_type;
      }
    }
  }

  return $entity_types;
}

528
/**
529
 * Content translation controller factory.
530 531 532 533
 *
 * @param string $entity_type
 *   The type of the entity being translated.
 *
534 535
 * @return \Drupal\content_translation\ContentTranslationControllerInterface
 *   An instance of the content translation controller interface.
536
 */
537
function content_translation_controller($entity_type) {
538 539
  $entity_info = entity_get_info($entity_type);
  // @todo Throw an exception if the key is missing.
540
  return new $entity_info['controllers']['translation']($entity_type, $entity_info);
541 542 543 544 545 546 547 548 549
}

/**
 * Returns the entity form controller for the given form.
 *
 * @param array $form_state
 *   The form state array holding the entity form controller.
 *
 * @return \Drupal\Core\Entity\EntityFormControllerInterface;
550
 *   An instance of the content translation form interface or FALSE if not an
551 552
 *   entity form.
 */
553
function content_translation_form_controller(array $form_state) {
554 555 556 557
  return isset($form_state['controller']) && $form_state['controller'] instanceof EntityFormControllerInterface ? $form_state['controller'] : FALSE;
}

/**
558
 * Checks whether a content translation is accessible.
559 560 561
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity to be accessed.
562 563 564 565 566 567
 * @param $op
 *   The operation to be performed on the translation. Possible values are:
 *   - "view"
 *   - "update"
 *   - "delete"
 *   - "create"
568 569 570 571
 *
 * @return
 *   TRUE if the current user is allowed to view the translation.
 */
572 573
function content_translation_access(EntityInterface $entity, $op) {
  return content_translation_controller($entity->entityType())->getTranslationAccess($entity, $op) ;
574 575 576 577 578
}

/**
 * Implements hook_permission().
 */
579
function content_translation_permission() {
580
  $permission = array(
581
    'administer content translation' => array(
582
      'title' => t('Administer translation settings'),
583
      'description' => t('Configure translatability of entities and fields.'),
584
    ),
585
    'create content translations' => array(
586 587
      'title' => t('Create translations'),
    ),
588
    'update content translations' => array(
589 590
      'title' => t('Edit translations'),
    ),
591
    'delete content translations' => array(
592 593
      'title' => t('Delete translations'),
    ),
594 595 596 597 598
    'translate any entity' => array(
      'title' => t('Translate any entity'),
    ),
  );

599 600
  // Create a translate permission for each enabled entity type and (optionally)
  // bundle.
601
  foreach (entity_get_info() as $entity_type => $info) {
602 603 604 605 606 607
    if (!empty($info['permission_granularity'])) {
      $t_args = array('@entity_label' => drupal_strtolower(t($info['label'])));

      switch ($info['permission_granularity']) {
        case 'bundle':
          foreach (entity_get_bundles($entity_type) as $bundle => $bundle_info) {
608
            if (content_translation_enabled($entity_type, $bundle)) {
609
              $t_args['%bundle_label'] = isset($bundle_info['label']) ? $bundle_info['label'] : $bundle;
610
              $permission["translate $bundle $entity_type"] = array(
611
                'title' => t('Translate %bundle_label @entity_label', $t_args),
612 613 614 615 616 617
              );
            }
          }
          break;

        case 'entity_type':
618
          if (content_translation_enabled($entity_type)) {
619 620 621 622 623 624
            $permission["translate $entity_type"] = array(
              'title' => t('Translate @entity_label', $t_args),
            );
          }
          break;
      }
625 626 627 628 629 630 631 632 633
    }
  }

  return $permission;
}

/**
 * Implements hook_form_alter().
 */
634
function content_translation_form_alter(array &$form, array &$form_state) {
635 636 637 638
  $form_controller = content_translation_form_controller($form_state);
  $entity = $form_controller ? $form_controller->getEntity() : NULL;

  if ($entity instanceof ContentEntityInterface && $entity->isTranslatable() && count($entity->getTranslationLanguages()) > 1) {
639
    $controller = content_translation_controller($entity->entityType());
640 641 642 643 644 645 646 647 648 649
    $controller->entityFormAlter($form, $form_state, $entity);

    // @todo Move the following lines to the code generating the property form
    //   elements once we have an official #multilingual FAPI key.
    $translations = $entity->getTranslationLanguages();
    $form_langcode = $form_controller->getFormLangcode($form_state);

    // Handle fields shared between translations when there is at least one
    // translation available or a new one is being created.
    if (!$entity->isNew() && (!isset($translations[$form_langcode]) || count($translations) > 1)) {
650 651 652
      foreach ($entity->getPropertyDefinitions() as $property_name => $definition) {
        if (isset($form[$property_name])) {
          $form[$property_name]['#multilingual'] = !empty($definition['translatable']);
653 654 655 656 657 658 659
        }
      }
    }

  }
}

660
/**
661
 * Implements hook_language_fallback_candidates_OPERATION_alter().
662 663 664
 *
 * Performs language fallback for unaccessible translations.
 */
665 666 667 668 669
function content_translation_language_fallback_candidates_entity_view_alter(&$candidates, $context) {
  $entity = $context['data'];
  foreach ($entity->getTranslationLanguages() as $langcode => $language) {
    if (!content_translation_view_access($entity, $langcode)) {
      unset($candidates[$langcode]);
670 671 672 673
    }
  }
}

674 675 676
/**
 * Implements hook_entity_load().
 */
677
function content_translation_entity_load(array $entities, $entity_type) {
678 679
  $enabled_entities = array();

680
  if (content_translation_enabled($entity_type)) {
681
    foreach ($entities as $entity) {
682
      if ($entity instanceof ContentEntityInterface && $entity->isTranslatable()) {
683 684 685 686 687 688
        $enabled_entities[$entity->id()] = $entity;
      }
    }
  }

  if (!empty($enabled_entities)) {
689
    content_translation_load_translation_metadata($enabled_entities, $entity_type);
690 691 692 693 694 695 696 697 698 699 700
  }
}

/**
 * Loads translation data into the given entities.
 *
 * @param array $entities
 *   The entities keyed by entity ID.
 * @param string $entity_type
 *   The type of the entities.
 */
701 702
function content_translation_load_translation_metadata(array $entities, $entity_type) {
  $query = 'SELECT * FROM {content_translation} te WHERE te.entity_type = :entity_type AND te.entity_id IN (:entity_id)';
703
  $result = db_query($query, array(':entity_type' => $entity_type, ':entity_id' => array_keys($entities)));
704
  $exclude = array('entity_type', 'entity_id', 'langcode');
705 706 707
  foreach ($result as $record) {
    $entity = $entities[$record->entity_id];
    // @todo Declare these as entity (translation?) properties.
708 709
    foreach ($record as $field_name => $value) {
      if (!in_array($field_name, $exclude)) {
710 711 712 713 714
        $langcode = $record->langcode;
        $entity->translation[$langcode][$field_name] = $value;
        if (!$entity->hasTranslation($langcode)) {
          $entity->initTranslation($langcode);
        }
715 716
      }
    }
717 718 719 720 721 722
  }
}

/**
 * Implements hook_entity_insert().
 */
723
function content_translation_entity_insert(EntityInterface $entity) {
724
  // Only do something if translation support for the given entity is enabled.
725
  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
726 727 728
    return;
  }

729
  $fields = array('entity_type', 'entity_id', 'langcode', 'source', 'outdated', 'uid', 'status', 'created', 'changed');
730
  $query = db_insert('content_translation')->fields($fields);
731 732

  foreach ($entity->getTranslationLanguages() as $langcode => $language) {
733 734 735 736
    $translation = isset($entity->translation[$langcode]) ? $entity->translation[$langcode] : array();

    $translation += array(
      'source' => '',
737
      'uid' => $GLOBALS['user']->id(),
738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754
      'outdated' => FALSE,
      'status' => TRUE,
      'created' => REQUEST_TIME,
      'changed' => REQUEST_TIME,
    );

    $translation['entity_type'] = $entity->entityType();
    $translation['entity_id'] = $entity->id();
    $translation['langcode'] = $langcode;

    // Reorder values to match the schema.
    $values = array();
    foreach ($fields as $field_name) {
      $value = is_bool($translation[$field_name]) ? intval($translation[$field_name]) : $translation[$field_name];
      $values[$field_name] = $value;
    }
    $query->values($values);
755 756 757 758 759 760 761 762
  }

  $query->execute();
}

/**
 * Implements hook_entity_delete().
 */
763
function content_translation_entity_delete(EntityInterface $entity) {
764
  // Only do something if translation support for the given entity is enabled.
765
  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
766 767 768
    return;
  }

769
  db_delete('content_translation')
770 771 772 773 774 775 776 777
    ->condition('entity_type', $entity->entityType())
    ->condition('entity_id', $entity->id())
    ->execute();
}

/**
 * Implements hook_entity_update().
 */
778
function content_translation_entity_update(EntityInterface $entity) {
779
  // Only do something if translation support for the given entity is enabled.
780
  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
781 782 783
    return;
  }

784
  // Delete and create to ensure no stale value remains behind.
785 786
  content_translation_entity_delete($entity);
  content_translation_entity_insert($entity);
787 788 789 790 791
}

/**
 * Implements hook_field_extra_fields().
 */
792
function content_translation_field_extra_fields() {
793 794 795
  $extra = array();

  foreach (entity_get_info() as $entity_type => $info) {
796
    foreach (entity_get_bundles($entity_type) as $bundle => $bundle_info) {
797
      if (content_translation_enabled($entity_type, $bundle)) {
798 799 800 801 802 803 804 805 806 807 808 809 810
        $extra[$entity_type][$bundle]['form']['translation'] = array(
          'label' => t('Translation'),
          'description' => t('Translation settings'),
          'weight' => 10,
        );
      }
    }
  }

  return $extra;
}

/**
811
 * Implements hook_form_FORM_ID_alter() for 'field_ui_field_edit_form'.
812
 */
813
function content_translation_form_field_ui_field_edit_form_alter(array &$form, array &$form_state, $form_id) {
814
  $field = $form['#field'];
815 816 817
  $field_name = $field->getFieldName();
  $translatable = $field->isFieldTranslatable();
  $entity_type = $field->entity_type;
818
  $label = t('Field translation');
819

820
  if ($field->hasData()) {
821
    $form['field']['translatable'] = array(
822 823 824
      '#type' => 'item',
      '#title' => $label,
      '#attributes' => array('class' => 'translatable'),
825 826
      'link' => array(
        '#type' => 'link',
827 828
        '#prefix' => t('This field has data in existing content.') . ' ',
        '#title' => !$translatable ? t('Enable translation') : t('Disable translation'),
829
        '#href' => "admin/config/regional/content_translation/translatable/$entity_type/$field_name",
830
        '#options' => array('query' => drupal_get_destination()),
831
        '#access' => user_access('administer content translation'),
832 833 834 835 836 837
      ),
    );
  }
  else {
    $form['field']['translatable'] = array(
      '#type' => 'checkbox',
838
      '#title' => t('Users may translate this field.'),
839 840 841
      '#default_value' => $translatable,
    );
  }
842 843

  $form['field']['translatable']['#weight'] = 20;
844 845
}

846
/**
847
 * Implements hook_form_FORM_ID_alter() for 'field_ui_field_instance_edit_form'.
848
 */
849
function content_translation_form_field_ui_field_instance_edit_form_alter(array &$form, array &$form_state, $form_id) {
850
  if ($form['#field']->isFieldTranslatable()) {
851
    module_load_include('inc', 'content_translation', 'content_translation.admin');
852
    $element = content_translation_field_sync_widget($form['#field']);
853 854 855 856 857 858 859 860 861
    if ($element) {
      $form['instance']['settings']['translation_sync'] = $element;
    }
  }
}

/**
 * Implements hook_field_info_alter().
 */
862
function content_translation_field_info_alter(&$info) {
863 864 865 866 867 868 869 870 871
  foreach ($info as $field_type => &$field_type_info) {
    // By default no column has to be synchronized.
    $field_type_info['settings'] += array('translation_sync' => FALSE);
    // Synchronization can be enabled per instance.
    $field_type_info['instance_settings'] += array('translation_sync' => FALSE);
  }
}

/**
872
 * Implements hook_entity_presave().
873
 */
874
function content_translation_entity_presave(EntityInterface $entity) {
875
  if ($entity instanceof ContentEntityInterface && $entity->isTranslatable()) {
876 877
    // @todo Avoid using request attributes once translation metadata become
    //   regular fields.
878 879
    $attributes = \Drupal::request()->attributes;
    \Drupal::service('content_translation.synchronizer')->synchronizeFields($entity, $entity->language()->id, $attributes->get('source_langcode'));
880 881 882
  }
}

883 884 885
/**
 * Implements hook_element_info_alter().
 */
886
function content_translation_element_info_alter(&$type) {
887
  if (isset($type['language_configuration'])) {
888
    $type['language_configuration']['#process'][] = 'content_translation_language_configuration_element_process';
889 890
  }
}
891

892
/**
893
 * Returns a widget to enable content translation per entity bundle.
894 895 896 897 898 899 900 901 902 903 904 905 906 907 908
 *
 * Backward compatibility layer to support entities not using the language
 * configuration form element.
 *
 * @todo Remove once all core entities have language configuration.
 *
 * @param string $entity_type
 *   The type of the entity being configured for translation.
 * @param string $bundle
 *   The bundle of the entity being configured for translation.
 * @param array $form
 *   The configuration form array.
 * @param array $form_state
 *   The configuration form state array.
 */
909 910
function content_translation_enable_widget($entity_type, $bundle, array &$form, array &$form_state) {
  $key = $form_state['content_translation']['key'];
911 912 913 914
  if (!isset($form_state['language'][$key])) {
    $form_state['language'][$key] = array();
  }
  $form_state['language'][$key] += array('entity_type' => $entity_type, 'bundle' => $bundle);
915 916
  $element = content_translation_language_configuration_element_process(array('#name' => $key), $form_state, $form);
  unset($element['content_translation']['#element_validate']);
917 918 919 920 921 922 923 924 925 926 927 928
  return $element;
}

/**
 * Process callback: Expands the language_configuration form element.
 *
 * @param array $element
 *   Form API element.
 *
 * @return
 *   Processed language configuration element.
 */
929 930 931
function content_translation_language_configuration_element_process(array $element, array &$form_state, array &$form) {
  if (empty($element['#content_translation_skip_alter']) && user_access('administer content translation')) {
    $form_state['content_translation']['key'] = $element['#name'];
932
    $context = $form_state['language'][$element['#name']];
933

934
    $element['content_translation'] = array(
935 936
      '#type' => 'checkbox',
      '#title' => t('Enable translation'),
937 938
      '#default_value' => content_translation_enabled($context['entity_type'], $context['bundle']),
      '#element_validate' => array('content_translation_language_configuration_element_validate'),
939 940
      '#prefix' => '<label>' . t('Translation') . '</label>',
    );
941

942
    $form['actions']['submit']['#submit'][] = 'content_translation_language_configuration_element_submit';
943
  }
944 945 946 947
  return $element;
}

/**
948
 * Form validation handler for element added with content_translation_language_configuration_element_process().
949 950 951 952 953
 *
 * Checks whether translation can be enabled: if language is set to one of the
 * special languages and language selector is not hidden, translation cannot be
 * enabled.
 *
954
 * @see content_translation_language_configuration_element_submit()
955
 */
956 957
function content_translation_language_configuration_element_validate($element, array &$form_state, array $form) {
  $key = $form_state['content_translation']['key'];
958
  $values = $form_state['values'][$key];
959
  if (language_is_locked($values['langcode']) && !$values['language_show'] && $values['content_translation']) {
960
    foreach (language_list(Language::STATE_LOCKED) as $language) {
961 962 963 964 965
      $locked_languages[] = $language->name;
    }
    // @todo Set the correct form element name as soon as the element parents
    //   are correctly set. We should be using NestedArray::getValue() but for
    //   now we cannot.
966
    form_set_error('', t('"Show language selector" is not compatible with translating content that has default language: %choice. Either do not hide the language selector or pick a specific language.', array('%choice' => $locked_languages[$values['langcode']])));
967 968 969 970
  }
}

/**
971
 * Form submission handler for element added with content_translation_language_configuration_element_process().
972
 *
973
 * Stores the content translation settings.
974
 *
975
 * @see content_translation_language_configuration_element_validate()
976
 */
977