content_translation.module 39.8 KB
Newer Older
1 2 3 4 5 6 7 8
<?php

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

use Drupal\Core\Language\Language;
9
use Drupal\Core\Session\AccountInterface;
10 11 12 13 14 15 16
use Drupal\Core\Entity\EntityFormControllerInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityNG;

/**
 * Implements hook_help().
 */
17
function content_translation_help($path, $arg) {
18
  switch ($path) {
19
    case 'admin/help#content_translation':
20 21
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
22
      $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/entity_translation')) . '</p>';
23 24 25
      $output .= '<h3>' . t('Uses') . '</h3>';
      $output .= '<dl>';
      $output .= '<dt>' . t('Enabling translation') . '</dt>';
26
      $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>';
27
      $output .= '<p>' . t('After adding languages, <a href="!url">configure translation</a>.', array('!url' => url('admin/config/regional/content-language'))) . '</p>';
28
      $output .= '<dt>' . t('Translating content') . '</dt>';
29
      $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>';
30 31 32 33 34
      $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>';
35
      $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>';
36 37
      $output .= '</dl>';
      return $output;
38 39 40 41

    case 'admin/config/regional/content-language':
      $output = '';
      if (!language_multilingual()) {
42
        $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')));
43 44
      }
      return $output;
45 46 47
  }
}

48 49 50
/**
 * Implements hook_module_implements_alter().
 */
51
function content_translation_module_implements_alter(&$implementations, $hook) {
52 53 54 55
  switch ($hook) {
    // Move some of our hook implementations to the end of the list.
    case 'menu_alter':
    case 'entity_info_alter':
56 57 58
      $group = $implementations['content_translation'];
      unset($implementations['content_translation']);
      $implementations['content_translation'] = $group;
59 60 61 62
      break;
  }
}

63 64 65
/**
 * Implements hook_language_type_info_alter().
 */
66
function content_translation_language_types_info_alter(array &$language_types) {
67 68 69
  // Make content language negotiation configurable by removing the 'locked'
  // flag.
  $language_types[Language::TYPE_CONTENT]['locked'] = FALSE;
70
  unset($language_types[Language::TYPE_CONTENT]['fixed']);
71 72 73 74 75
}

/**
 * Implements hook_entity_info_alter().
 */
76
function content_translation_entity_info_alter(array &$entity_info) {
77 78
  // Provide defaults for translation info.
  foreach ($entity_info as $entity_type => &$info) {
79 80 81 82
    if (empty($info['translatable'])) {
      continue;
    }

83 84
    if (!isset($info['translation']['content_translation'])) {
      $info['translation']['content_translation'] = array();
85 86 87 88 89 90
    }

    // 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.
91
    $info['controllers'] += array('translation' => 'Drupal\content_translation\ContentTranslationController');
92

93 94 95 96 97
    // 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;
98 99
    }

100
    $path = $info['menu_base_path'];
101

102 103 104 105 106
    $info += array(
      'menu_view_path' => $path,
      'menu_edit_path' => "$path/edit",
      'menu_path_wildcard' => "%$entity_type",
    );
107

108
    $entity_position = count(explode('/', $path)) - 1;
109 110
    $info['translation']['content_translation'] += array(
      'access_callback' => 'content_translation_translate_access',
111 112 113 114
      'access_arguments' => array($entity_position),
    );
  }
}
115

116 117 118
/**
 * Implements hook_entity_bundle_info_alter().
 */
119
function content_translation_entity_bundle_info_alter(&$bundles) {
120 121
  foreach ($bundles as $entity_type => &$info) {
    foreach ($info as $bundle => &$bundle_info) {
122
      $enabled = content_translation_get_config($entity_type, $bundle, 'enabled');
123
      $bundle_info['translatable'] = !empty($enabled);
124 125 126 127 128 129 130
    }
  }
}

/**
 * Implements hook_menu().
 */
131
function content_translation_menu() {
132 133 134 135 136
  $items = array();

  // Create tabs for all possible entity types.
  foreach (entity_get_info() as $entity_type => $info) {
    // Provide the translation UI only for enabled types.
137
    if (content_translation_enabled($entity_type)) {
138 139 140
      $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'));
141
      $menu_info = array_intersect_key($info['translation']['content_translation'], $keys) + array('file' => 'content_translation.pages.inc');
142 143 144 145 146 147 148 149 150
      $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(
151
        'title' => 'Translate',
152
        'page callback' => 'content_translation_overview',
153 154
        'page arguments' => array($entity_position),
        'type' => MENU_LOCAL_TASK,
155
        'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
156 157 158
        'weight' => 2,
      ) + $item;

159 160 161 162 163 164
      $items["$path/translations/overview"] = array(
        'title' => 'Overview',
        'type' => MENU_DEFAULT_LOCAL_TASK,
        'weight' => 0,
      );

165 166 167 168 169
      // 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);
170
      $items["$path/translations/add/%language/%language"] = array(
171
        'title' => 'Add',
172
        'page callback' => 'content_translation_add_page',
173
        'page arguments' => $args,
174
        'access callback' => 'content_translation_add_access',
175
        'access arguments' => $args,
176 177 178 179 180 181 182 183
        'type' => MENU_LOCAL_TASK,
        'weight' => 1,
      ) + $item;

      // Edit translation callback.
      $args = array($entity_position, $language_position);
      $items["$path/translations/edit/%language"] = array(
        'title' => 'Edit',
184
        'page callback' => 'content_translation_edit_page',
185
        'page arguments' => $args,
186
        'access callback' => 'content_translation_edit_access',
187 188 189
        'access arguments' => $args,
        'type' => MENU_LOCAL_TASK,
        'weight' => 1,
190 191 192 193 194 195
      ) + $item;

      // Delete translation callback.
      $items["$path/translations/delete/%language"] = array(
        'title' => 'Delete',
        'page callback' => 'drupal_get_form',
196 197
        'page arguments' => array('content_translation_delete_confirm', $entity_position, $language_position),
        'access callback' => 'content_translation_delete_access',
198
        'access arguments' => $args,
199 200 201 202
      ) + $item;
    }
  }

203
  $items['admin/config/regional/content_translation/translatable/%'] = array(
204 205
    'title' => 'Confirm change in translatability.',
    'description' => 'Confirm page for changing field translatability.',
206
    'route_name' => 'content_translation_translatable',
207 208 209 210 211 212 213 214
  );

  return $items;
}

/**
 * Implements hook_menu_alter().
 */
215
function content_translation_menu_alter(array &$items) {
216 217
  // Check that the declared menu base paths are actually valid.
  foreach (entity_get_info() as $entity_type => $info) {
218
    if (content_translation_enabled($entity_type)) {
219 220
      $path = $info['menu_base_path'];

221 222 223 224
      // 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().
225
      if (!isset($items[$path]) && !isset($items["$path/edit"])
226
          && !isset($items[_content_translation_menu_strip_loaders($path)])) {
227 228
        unset(
          $items["$path/translations"],
229
          $items["$path/translations/add/%language/%language"],
230 231
          $items["$path/translations/delete/%language"]
        );
232
        $t_args = array('@entity_type' => isset($info['label']) ? $info['label'] : $entity_type);
233
        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);
234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258
      }
      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;
          }
        }
      }
    }
  }
}

259 260 261 262 263 264 265 266 267
/**
 * Strips out menu loaders from the given path.
 *
 * @param string $path
 *   The path to process.
 *
 * @return
 *   The given path where all the menu loaders are replaced with "%".
 */
268
function _content_translation_menu_strip_loaders($path) {
269 270 271
  return preg_replace('|%[^/]+|', '%', $path);
}

272 273 274 275 276 277
/**
 * Access callback for the translation overview page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity whose translation overview should be displayed.
 */
278
function content_translation_translate_access(EntityInterface $entity) {
279
  $entity_type = $entity->entityType();
280
  return empty($entity->getUntranslated()->language()->locked) && language_multilingual() && $entity->isTranslatable() &&
281
    (user_access('create content translations') || user_access('update content translations') || user_access('delete content translations'));
282 283
}

284 285 286 287 288 289 290
/**
 * 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.
291
 * @param \Drupal\Core\Session\AccountInterface $account
292 293 294
 *   (optional) The account for which view access should be checked. Defaults to
 *   the current user.
 */
295
function content_translation_view_access(EntityInterface $entity, $langcode, AccountInterface $account = NULL) {
296 297 298 299
  $entity_type = $entity->entityType();
  return !empty($entity->translation[$langcode]['status']) || user_access('translate any entity', $account) || user_access("translate $entity_type entities", $account);
}

300 301 302 303 304 305
/**
 * Access callback for the translation addition page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity being translated.
 * @param \Drupal\Core\Language\Language $source
306 307
 *   (optional) The language of the values being translated. Defaults to the
 *   entity language.
308
 * @param \Drupal\Core\Language\Language $target
309 310
 *   (optional) The language of the translated values. Defaults to the current
 *   content language.
311
 */
312
function content_translation_add_access(EntityInterface $entity, Language $source = NULL, Language $target = NULL) {
313
  $source = !empty($source) ? $source : $entity->language();
314
  $target = !empty($target) ? $target : language(Language::TYPE_CONTENT);
315 316
  $translations = $entity->getTranslationLanguages();
  $languages = language_list();
317
  return $source->id != $target->id && isset($languages[$source->id]) && isset($languages[$target->id]) && !isset($translations[$target->id]) && content_translation_access($entity, 'create');
318 319 320 321 322 323 324 325 326 327 328
}

/**
 * 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.
 */
329
function content_translation_edit_access(EntityInterface $entity, Language $language = NULL) {
330
  $language = !empty($language) ? $language : language(Language::TYPE_CONTENT);
331 332
  $translations = $entity->getTranslationLanguages();
  $languages = language_list();
333
  return isset($languages[$language->id]) && $language->id != $entity->getUntranslated()->language()->id && isset($translations[$language->id]) && content_translation_access($entity, 'update');
334 335 336 337 338 339 340 341 342 343 344
}

/**
 * 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.
 */
345
function content_translation_delete_access(EntityInterface $entity, Language $language = NULL) {
346
  $language = !empty($language) ? $language : language(Language::TYPE_CONTENT);
347 348
  $translations = $entity->getTranslationLanguages();
  $languages = language_list();
349
  return isset($languages[$language->id]) && $language->id != $entity->getUntranslated()->language()->id && isset($translations[$language->id]) && content_translation_access($entity, 'delete');
350 351
}

352 353 354
/**
 * Implements hook_library_info().
 */
355 356 357 358
function content_translation_library_info() {
  $path = drupal_get_path('module', 'content_translation');
  $libraries['drupal.content_translation.admin'] = array(
    'title' => 'Content translation UI',
359 360
    'version' => VERSION,
    'js' => array(
361
      $path . '/content_translation.admin.js' => array(),
362 363
    ),
    'css' => array(
364
      $path . '/css/content_translation.admin.css' => array(),
365 366 367 368 369 370 371 372 373 374 375
    ),
    'dependencies' => array(
      array('system', 'jquery'),
      array('system', 'drupal'),
      array('system', 'jquery.once'),
    ),
  );

  return $libraries;
}

376
/**
377
 * Returns the key name used to store the configuration setting.
378
 *
379 380
 * Based on the entity type and bundle, the keys used to store configuration
 * will have a common root name.
381 382 383 384 385 386 387 388 389
 *
 * @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 $setting
 *   The name of the setting.
 *
 * @return string
390
 *   The key name of the configuration setting.
391 392 393 394
 *
 * @todo Generalize this logic so that it is available to any module needing
 *   per-bundle configuration.
 */
395
function content_translation_get_config_key($entity_type, $bundle, $setting) {
396 397
  $entity_type = preg_replace('/[^0-9a-zA-Z_]/', "_", $entity_type);
  $bundle = preg_replace('/[^0-9a-zA-Z_]/', "_", $bundle);
398
  return $entity_type . '.' . $bundle . '.content_translation.' . $setting;
399 400 401 402 403 404 405 406 407 408 409 410 411 412 413
}

/**
 * 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 $setting
 *   The name of the setting.
 *
 * @returns mixed
 *   The stored value for the given setting.
 */
414 415 416
function content_translation_get_config($entity_type, $bundle, $setting) {
  $key = content_translation_get_config_key($entity_type, $bundle, $setting);
  return config('content_translation.settings')->get($key);
417 418 419 420 421 422 423 424 425 426 427 428 429 430
}

/**
 * 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 $value
 *   The value to be stored for the given setting.
 */
431 432 433
function content_translation_set_config($entity_type, $bundle, $setting, $value) {
  $key = content_translation_get_config_key($entity_type, $bundle, $setting);
  return config('content_translation.settings')->set($key, $value)->save();
434 435 436 437 438 439 440 441 442 443 444 445 446 447 448
}

/**
 * Determines whether the given entity type is translatable.
 *
 * @param string $entity_type
 *   The type of the entity.
 * @param string $bundle
 *   (optional) The bundle of the entity. If no bundle is provided, all the
 *   available bundles are checked.
 *
 * @returns
 *   TRUE if the specified bundle is translatable. If no bundle is provided
 *   returns TRUE if at least one of the entity bundles is translatable.
 */
449
function content_translation_enabled($entity_type, $bundle = NULL) {
450
  $enabled = FALSE;
451
  $info = entity_get_info($entity_type);
452

453 454 455
  if (!empty($info['translatable'])) {
    $bundles = !empty($bundle) ? array($bundle) : array_keys(entity_get_bundles($entity_type));
    foreach ($bundles as $bundle) {
456
      if (content_translation_get_config($entity_type, $bundle, 'enabled')) {
457 458 459
        $enabled = TRUE;
        break;
      }
460 461 462
    }
  }

463
  return $enabled;
464 465
}

466 467 468 469 470 471
/**
 * Returns all the translatable entity types.
 *
 * @return array
 *   An array of entity types keyed by entity type.
 */
472
function content_translation_types_translatable() {
473 474 475
  $entity_types = &drupal_static(__FUNCTION__, array());

  foreach (entity_get_info() as $entity_type => $info) {
476
    if (content_translation_enabled($entity_type)) {
477 478 479 480 481 482 483
      // 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.
484
      $path = _content_translation_menu_strip_loaders($info['menu_base_path']);
485 486 487 488 489 490 491 492 493
      if (!empty($items[$path]) && !empty($items[$path . '/translations'])) {
        $entity_types[$entity_type] = $entity_type;
      }
    }
  }

  return $entity_types;
}

494
/**
495
 * Content translation controller factory.
496 497 498 499
 *
 * @param string $entity_type
 *   The type of the entity being translated.
 *
500 501
 * @return \Drupal\content_translation\ContentTranslationControllerInterface
 *   An instance of the content translation controller interface.
502
 */
503
function content_translation_controller($entity_type) {
504 505
  $entity_info = entity_get_info($entity_type);
  // @todo Throw an exception if the key is missing.
506
  return new $entity_info['controllers']['translation']($entity_type, $entity_info);
507 508 509 510 511 512 513 514 515
}

/**
 * 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;
516
 *   An instance of the content translation form interface or FALSE if not an
517 518
 *   entity form.
 */
519
function content_translation_form_controller(array $form_state) {
520 521 522 523
  return isset($form_state['controller']) && $form_state['controller'] instanceof EntityFormControllerInterface ? $form_state['controller'] : FALSE;
}

/**
524
 * Checks whether a content translation is accessible.
525 526 527
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity to be accessed.
528 529 530 531 532 533
 * @param $op
 *   The operation to be performed on the translation. Possible values are:
 *   - "view"
 *   - "update"
 *   - "delete"
 *   - "create"
534 535 536 537
 *
 * @return
 *   TRUE if the current user is allowed to view the translation.
 */
538 539
function content_translation_access(EntityInterface $entity, $op) {
  return content_translation_controller($entity->entityType())->getTranslationAccess($entity, $op) ;
540 541 542 543 544
}

/**
 * Implements hook_permission().
 */
545
function content_translation_permission() {
546
  $permission = array(
547
    'administer content translation' => array(
548
      'title' => t('Administer translation settings'),
549
      'description' => t('Configure translatability of entities and fields.'),
550
    ),
551
    'create content translations' => array(
552 553
      'title' => t('Create translations'),
    ),
554
    'update content translations' => array(
555 556
      'title' => t('Edit translations'),
    ),
557
    'delete content translations' => array(
558 559
      'title' => t('Delete translations'),
    ),
560 561 562 563 564
    'translate any entity' => array(
      'title' => t('Translate any entity'),
    ),
  );

565 566
  // Create a translate permission for each enabled entity type and (optionally)
  // bundle.
567
  foreach (entity_get_info() as $entity_type => $info) {
568 569 570 571 572 573
    if (!empty($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 => $bundle_info) {
574
            if (content_translation_enabled($entity_type, $bundle)) {
575
              $t_args['%bundle_label'] = isset($bundle_info['label']) ? $bundle_info['label'] : $bundle;
576
              $permission["translate $bundle $entity_type"] = array(
577
                'title' => t('Translate %bundle_label @entity_label', $t_args),
578 579 580 581 582 583
              );
            }
          }
          break;

        case 'entity_type':
584
          if (content_translation_enabled($entity_type)) {
585 586 587 588 589 590
            $permission["translate $entity_type"] = array(
              'title' => t('Translate @entity_label', $t_args),
            );
          }
          break;
      }
591 592 593 594 595 596 597 598 599
    }
  }

  return $permission;
}

/**
 * Implements hook_form_alter().
 */
600 601 602
function content_translation_form_alter(array &$form, array &$form_state) {
  if (($form_controller = content_translation_form_controller($form_state)) && ($entity = $form_controller->getEntity()) && !$entity->isNew() && $entity->isTranslatable()) {
    $controller = content_translation_controller($entity->entityType());
603 604 605 606 607 608 609 610 611 612
    $controller->entityFormAlter($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)) {
613
      $entity = $entity->getNGEntity();
614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632
      if ($entity instanceof EntityNG) {
        foreach ($entity->getPropertyDefinitions() as $property_name => $definition) {
          if (isset($form[$property_name])) {
            $form[$property_name]['#multilingual'] = !empty($definition['translatable']);
          }
        }
      }
      else {
        foreach (field_info_instances($entity->entityType(), $entity->bundle()) as $instance) {
          $field_name = $instance['field_name'];
          $field = field_info_field($field_name);
          $form[$field_name]['#multilingual'] = !empty($field['translatable']);
        }
      }
    }

  }
}

633 634 635 636 637
/**
 * Implements hook_field_language_alter().
 *
 * Performs language fallback for unaccessible translations.
 */
638
function content_translation_field_language_alter(&$display_language, $context) {
639 640 641
  $entity = $context['entity'];
  $entity_type = $entity->entityType();

642
  if (isset($entity->translation[$context['langcode']]) && $entity->isTranslatable() && !content_translation_view_access($entity, $context['langcode'])) {
643 644 645
    $instances = field_info_instances($entity_type, $entity->bundle());
    // Avoid altering the real entity.
    $entity = clone($entity);
646
    $entity_langcode = $entity->getUntranslated()->language()->id;
647 648

    foreach ($entity->translation as $langcode => $translation) {
649
      if ($langcode == $context['langcode'] || !content_translation_view_access($entity, $langcode)) {
650
        // Unset unaccessible field translations: if the field is untranslatable
651
        // unsetting a language different from Language::LANGCODE_NOT_SPECIFIED has no
652 653 654
        // effect.
        foreach ($instances as $instance) {
          // @todo BC entities have the same value accessibile both with the
655
          //   entity language and with Language::LANGCODE_DEFAULT. We need need to unset
656 657
          //   both until we remove the BC layer.
          if ($langcode == $entity_langcode) {
658
            unset($entity->{$instance['field_name']}[Language::LANGCODE_DEFAULT]);
659 660 661 662 663 664 665 666 667 668 669
          }
          unset($entity->{$instance['field_name']}[$langcode]);
        }
      }
    }

    // Find the new fallback values.
    field_language_fallback($display_language, $entity, $context['langcode']);
  }
}

670 671 672
/**
 * Implements hook_entity_load().
 */
673
function content_translation_entity_load(array $entities, $entity_type) {
674 675
  $enabled_entities = array();

676
  if (content_translation_enabled($entity_type)) {
677
    foreach ($entities as $entity) {
678
      if ($entity->isTranslatable()) {
679 680 681 682 683 684
        $enabled_entities[$entity->id()] = $entity;
      }
    }
  }

  if (!empty($enabled_entities)) {
685
    content_translation_load_translation_metadata($enabled_entities, $entity_type);
686 687 688 689 690 691 692 693 694 695 696
  }
}

/**
 * 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.
 */
697 698
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)';
699
  $result = db_query($query, array(':entity_type' => $entity_type, ':entity_id' => array_keys($entities)));
700
  $exclude = array('entity_type', 'entity_id', 'langcode');
701 702 703
  foreach ($result as $record) {
    $entity = $entities[$record->entity_id];
    // @todo Declare these as entity (translation?) properties.
704 705
    foreach ($record as $field_name => $value) {
      if (!in_array($field_name, $exclude)) {
706 707 708 709 710
        $langcode = $record->langcode;
        $entity->translation[$langcode][$field_name] = $value;
        if (!$entity->hasTranslation($langcode)) {
          $entity->initTranslation($langcode);
        }
711 712
      }
    }
713 714 715 716 717 718
  }
}

/**
 * Implements hook_entity_insert().
 */
719
function content_translation_entity_insert(EntityInterface $entity) {
720
  // Only do something if translation support for the given entity is enabled.
721
  if (!$entity->isTranslatable()) {
722 723 724
    return;
  }

725
  $fields = array('entity_type', 'entity_id', 'langcode', 'source', 'outdated', 'uid', 'status', 'created', 'changed');
726
  $query = db_insert('content_translation')->fields($fields);
727 728

  foreach ($entity->getTranslationLanguages() as $langcode => $language) {
729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750
    $translation = isset($entity->translation[$langcode]) ? $entity->translation[$langcode] : array();

    $translation += array(
      'source' => '',
      'uid' => $GLOBALS['user']->uid,
      '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);
751 752 753 754 755 756 757 758
  }

  $query->execute();
}

/**
 * Implements hook_entity_delete().
 */
759
function content_translation_entity_delete(EntityInterface $entity) {
760
  // Only do something if translation support for the given entity is enabled.
761
  if (!$entity->isTranslatable()) {
762 763 764
    return;
  }

765
  db_delete('content_translation')
766 767 768 769 770 771 772 773
    ->condition('entity_type', $entity->entityType())
    ->condition('entity_id', $entity->id())
    ->execute();
}

/**
 * Implements hook_entity_update().
 */
774
function content_translation_entity_update(EntityInterface $entity) {
775
  // Only do something if translation support for the given entity is enabled.
776
  if (!$entity->isTranslatable()) {
777 778 779
    return;
  }

780
  // Delete and create to ensure no stale value remains behind.
781 782
  content_translation_entity_delete($entity);
  content_translation_entity_insert($entity);
783 784 785 786 787
}

/**
 * Implements hook_field_extra_fields().
 */
788
function content_translation_field_extra_fields() {
789 790 791
  $extra = array();

  foreach (entity_get_info() as $entity_type => $info) {
792
    foreach (entity_get_bundles($entity_type) as $bundle => $bundle_info) {
793
      if (content_translation_enabled($entity_type, $bundle)) {
794 795 796 797 798 799 800 801 802 803 804 805 806
        $extra[$entity_type][$bundle]['form']['translation'] = array(
          'label' => t('Translation'),
          'description' => t('Translation settings'),
          'weight' => 10,
        );
      }
    }
  }

  return $extra;
}

/**
807
 * Implements hook_form_FORM_ID_alter() for 'field_ui_field_edit_form'.
808
 */
809
function content_translation_form_field_ui_field_edit_form_alter(array &$form, array &$form_state, $form_id) {
810 811 812
  $field = $form['#field'];
  $field_name = $field['field_name'];
  $translatable = $field['translatable'];
813
  $label = t('Field translation');
814

815
  if ($field->hasData()) {
816
    $form['field']['translatable'] = array(
817 818 819
      '#type' => 'item',
      '#title' => $label,
      '#attributes' => array('class' => 'translatable'),
820 821
      'link' => array(
        '#type' => 'link',
822 823
        '#prefix' => t('This field has data in existing content.') . ' ',
        '#title' => !$translatable ? t('Enable translation') : t('Disable translation'),
824
        '#href' => 'admin/config/regional/content_translation/translatable/' . $field_name,
825
        '#options' => array('query' => drupal_get_destination()),
826
        '#access' => user_access('administer content translation'),
827 828 829 830 831 832
      ),
    );
  }
  else {
    $form['field']['translatable'] = array(
      '#type' => 'checkbox',
833
      '#title' => t('Users may translate this field.'),
834 835 836
      '#default_value' => $translatable,
    );
  }
837 838

  $form['field']['translatable']['#weight'] = 20;
839 840
}

841
/**
842
 * Implements hook_form_FORM_ID_alter() for 'field_ui_field_instance_edit_form'.
843
 */
844
function content_translation_form_field_ui_field_instance_edit_form_alter(array &$form, array &$form_state, $form_id) {
845
  if ($form['#field']['translatable']) {
846 847
    module_load_include('inc', 'content_translation', 'content_translation.admin');
    $element = content_translation_field_sync_widget($form['#field'], $form['#instance']);
848 849 850 851 852 853 854 855 856
    if ($element) {
      $form['instance']['settings']['translation_sync'] = $element;
    }
  }
}

/**
 * Implements hook_field_info_alter().
 */
857
function content_translation_field_info_alter(&$info) {
858 859 860 861 862 863 864 865 866
  foreach ($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);
  }
}

/**
867
 * Implements hook_entity_presave().
868
 */
869
function content_translation_entity_presave(EntityInterface $entity) {
870 871 872
  if ($entity->isTranslatable()) {
    // @todo Avoid using request attributes once translation metadata become
    //   regular fields.
873
    $attributes = Drupal::request()->attributes;
874
    Drupal::service('content_translation.synchronizer')->synchronizeFields($entity, $entity->language()->id, $attributes->get('source_langcode'));
875 876 877
  }
}

878 879 880
/**
 * Implements hook_element_info_alter().
 */
881
function content_translation_element_info_alter(&$type) {
882
  if (isset($type['language_configuration'])) {
883
    $type['language_configuration']['#process'][] = 'content_translation_language_configuration_element_process';
884 885
  }
}
886

887
/**
888
 * Returns a widget to enable content translation per entity bundle.
889 890 891 892 893 894 895 896 897 898 899 900 901 902 903
 *
 * 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 $form_state
 *   The configuration form state array.
 */
904 905
function content_translation_enable_widget($entity_type, $bundle, array &$form, array &$form_state) {
  $key = $form_state['content_translation']['key'];
906 907 908 909
  if (!isset($form_state['language'][$key])) {
    $form_state['language'][$key] = array();
  }
  $form_state['language'][$key] += array('entity_type' => $entity_type, 'bundle' => $bundle);
910 911
  $element = content_translation_language_configuration_element_process(array('#name' => $key), $form_state, $form);
  unset($element['content_translation']['#element_validate']);
912 913 914 915 916 917 918 919 920 921 922 923
  return $element;
}

/**
 * Process callback: Expands the language_configuration form element.
 *
 * @param array $element
 *   Form API element.
 *
 * @return
 *   Processed language configuration element.
 */
924 925 926
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'];
927
    $context = $form_state['language'][$element['#name']];
928

929
    $element['content_translation'] = array(
930 931
      '#type' => 'checkbox',
      '#title' => t('Enable translation'),
932 933
      '#default_value' => content_translation_enabled($context['entity_type'], $context['bundle']),
      '#element_validate' => array('content_translation_language_configuration_element_validate'),
934 935
      '#prefix' => '<label>' . t('Translation') . '</label>',
    );
936

937
    $form['#submit'][] = 'content_translation_language_configuration_element_submit';
938
  }
939 940 941 942
  return $element;
}

/**
943
 * Form validation handler for element added with content_translation_language_configuration_element_process().
944 945 946 947 948
 *
 * 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.
 *
949
 * @see content_translation_language_configuration_element_submit()
950
 */
951 952
function content_translation_language_configuration_element_validate($element, array &$form_state, array $form) {
  $key = $form_state['conten