Issue #1896268 by tim.plunkett: Add Views integration for translation_entity().

core/modules/comment/comment.views.inc

@@ -376,6 +376,17 @@ function comment_views_data() {
     ),
   );
 
+  // Entity translation field.
+  if (drupal_container()->get('module_handler')->moduleExists('translation_entity')) {
+    $data['comment']['translation_link'] = array(
+      'title' => t('Translation link'),
+      'help' => t('Provide a link to the translations overview for comments.'),
+      'field' => array(
+        'id' => 'translation_entity_link',
+      ),
+    );
+  }
+
   // node_comment_statistics table
 
   // define the group

core/modules/node/node.views.inc

@@ -226,6 +226,17 @@ function node_views_data() {
     );
   }
 
+  // Entity translation field.
+  if (drupal_container()->get('module_handler')->moduleExists('translation_entity')) {
+    $data['node']['translation_link'] = array(
+      'title' => t('Translation link'),
+      'help' => t('Provide a link to the translations overview for nodes.'),
+      'field' => array(
+        'id' => 'translation_entity_link',
+      ),
+    );
+  }
+
   // Define some fields based upon views_handler_field_entity in the entity
   // table so they can be re-used with other query backends.
   // @see views_handler_field_entity

core/modules/taxonomy/taxonomy.views.inc

@@ -176,6 +176,17 @@ function taxonomy_views_data() {
     ),
   );
 
+  // Entity translation field.
+  if (drupal_container()->get('module_handler')->moduleExists('translation_entity')) {
+    $data['taxonomy_term_data']['translation_link'] = array(
+      'title' => t('Translation link'),
+      'help' => t('Provide a link to the translations overview for taxonomy terms.'),
+      'field' => array(
+        'id' => 'translation_entity_link',
+      ),
+    );
+  }
+
   // taxonomy_index table
 
   $data['taxonomy_index']['table']['group']  = t('Taxonomy term');

core/modules/translation_entity/lib/Drupal/translation_entity/Plugin/views/field/TranslationLink.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\translation_entity\Plugin\views\field\TranslationLink.
+ */
+
+namespace Drupal\translation_entity\Plugin\views\field;
+
+use Drupal\views\Plugin\views\field\FieldPluginBase;
+use Drupal\Core\Annotation\Plugin;
+use Drupal\Core\Entity\EntityInterface;
+
+/**
+ * Provides a translation link for an entity.
+ *
+ * @ingroup views_field_handlers
+ *
+ * @Plugin(
+ *   id = "translation_entity_link",
+ *   module = "translation_entity"
+ * )
+ */
+class TranslationLink extends FieldPluginBase {
+
+  /**
+   * Overrides \Drupal\views\Plugin\views\field\FieldPluginBase::defineOptions().
+   */
+  protected function defineOptions() {
+    $options = parent::defineOptions();
+    $options['text'] = array('default' => '', 'translatable' => TRUE);
+    return $options;
+  }
+
+  /**
+   * Overrides \Drupal\views\Plugin\views\field\FieldPluginBase::buildOptionsForm().
+   */
+  public function buildOptionsForm(&$form, &$form_state) {
+    $form['text'] = array(
+      '#type' => 'textfield',
+      '#title' => t('Text to display'),
+      '#default_value' => $this->options['text'],
+    );
+    parent::buildOptionsForm($form, $form_state);
+  }
+
+  /**
+   * Overrides \Drupal\views\Plugin\views\field\FieldPluginBase::render().
+   */
+  function render($values) {
+    return $this->render_link($this->get_entity($values), $values);
+  }
+
+  /**
+   * Alters the field to render a link.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface $entity
+   *   The entity being rendered.
+   * @param \stdClass $values
+   *   The current row of the views result.
+   *
+   * @return string
+   *   The acutal rendered text (without the link) of this field.
+   */
+  public function render_link(EntityInterface $entity, \stdClass $values) {
+    if (translation_entity_translate_access($entity)) {
+      $text = !empty($this->options['text']) ? $this->options['text'] : t('translate');
+
+      $this->options['alter']['make_link'] = TRUE;
+      $uri = $entity->uri();
+      $this->options['alter']['path'] = $uri['path'] . '/translations';
+
+      return $text;
+    }
+  }
+
+  /**
+   * Overrides \Drupal\views\Plugin\views\Plugin\field\FieldPluginBase::query().
+   */
+  public function query() {
+  }
+
+  /**
+   * Overrides \Drupal\views\Plugin\views\Plugin\field\FieldPluginBase::click_sortable().
+   */
+  public function click_sortable() {
+    return FALSE;
+  }
+
+}

core/modules/translation_entity/lib/Drupal/translation_entity/Tests/Views/TranslationLinkTest.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\translation_entity\Tests\Views\TranslationLinkTest.
+ */
+
+namespace Drupal\translation_entity\Tests\Views;
+
+use Drupal\views\Tests\ViewTestBase;
+use Drupal\translation_entity\Tests\EntityTranslationUITest;
+use Drupal\views\Tests\ViewTestData;
+
+/**
+ * Tests the Entity translation overview link field handler.
+ *
+ * @see \Drupal\translation_entity\Plugin\views\field\TranslationLink
+ */
+class TranslationLinkTest extends EntityTranslationUITest {
+
+  /**
+   * Views used by this test.
+   *
+   * @var array
+   */
+  public static $testViews = array('test_entity_translations_link');
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('translation_entity_test_views');
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Entity Translation: Link field',
+      'description' => 'Tests the Entity translation overview link field handler.',
+      'group' => 'Views Modules',
+    );
+  }
+
+  function setUp() {
+    // @todo Use entity_type once it is has multilingual Views integration.
+    $this->entityType = 'user';
+
+    parent::setUp();
+
+    ViewTestData::importTestViews(get_class($this), array('translation_entity_test_views'));
+  }
+
+  /**
+   * Implements \Drupal\translation_entity\Tests\EntityTranslationUITest::getTranslatorPermission().
+   */
+  function getTranslatorPermissions() {
+    return array("translate $this->entityType entities", 'edit original values');
+  }
+
+  /**
+   * Tests the Entity translation overview link field handler.
+   */
+  public function testTranslationLink() {
+    $this->drupalGet('test-entity-translations-link');
+    $this->assertLinkByHref('user/1/translations');
+    $this->assertNoLinkByHref('user/2/translations', 'The translations link is not present when translation_entity_translate_access() is FALSE.');
+  }
+
+  /**
+   * Overrides \Drupal\translation_entity\Tests\EntityTranslationUITest::testTranslationUI().
+   */
+  public function testTranslationUI() {
+    // @todo \Drupal\translation_entity\Tests\EntityTranslationUITest contains
+    //   essential helper methods that should be seprarated from test methods.
+  }
+
+}

core/modules/translation_entity/tests/modules/translation_entity_test_views/test_views/views.view.test_entity_translations_link.yml

+base_field: uid
+base_table: users
+core: 8.x
+description: ''
+disabled: '0'
+display:
+  default:
+    display_plugin: default
+    id: default
+    display_title: Master
+    position: ''
+    display_options:
+      access:
+        type: none
+      cache:
+        type: none
+      query:
+        type: views_query
+      exposed_form:
+        type: basic
+        options:
+          submit_button: Filter
+          reset_button: '1'
+          reset_button_label: Reset
+      pager:
+        type: full
+        options:
+          items_per_page: '50'
+      style:
+        type: table
+        options:
+          columns:
+            name: name
+            translation_link: translation_link
+          default: created
+      row:
+        type: fields
+      fields:
+        name:
+          id: name
+          table: users
+          field: name
+          label: Username
+          link_to_user: '1'
+          format_username: '1'
+        translation_link:
+          id: translation_link
+          table: users
+          field: translation_link
+          label: 'Translation link'
+          exclude: '0'
+          alter:
+            alter_text: '0'
+          element_class: ''
+          element_default_classes: '1'
+          empty: ''
+          hide_empty: '0'
+          empty_zero: '0'
+          hide_alter_empty: '1'
+          text: Translate
+      filters:
+        uid_raw:
+          id: uid_raw
+          table: users
+          field: uid_raw
+          operator: '!='
+          value:
+            value: '0'
+          group: '1'
+          exposed: '0'
+      sorts:
+        created:
+          id: created
+          table: users
+          field: created
+          order: DESC
+      title: People
+      empty:
+        area:
+          id: area
+          table: views
+          field: area
+          empty: '1'
+          content: 'No people available.'
+          format: filtered_html
+  page_1:
+    display_plugin: page
+    id: page_1
+    display_title: Page
+    position: ''
+    display_options:
+      path: test-entity-translations-link
+human_name: People
+module: views
+id: test_entity_translations_link
+tag: ''

core/modules/translation_entity/tests/modules/translation_entity_test_views/translation_entity_test_views.info

+name = Entity translation test views
+description = Provides default views for views entity translation tests.
+package = Testing
+version = VERSION
+core = 8.x
+dependencies[] = translation_entity
+dependencies[] = views
+hidden = TRUE

core/modules/translation_entity/tests/modules/translation_entity_test_views/translation_entity_test_views.module

+<?php

core/modules/user/user.views.inc

@@ -295,6 +295,17 @@ function user_views_data() {
     ),
   );
 
+  // Entity translation field.
+  if (drupal_container()->get('module_handler')->moduleExists('translation_entity')) {
+    $data['users']['translation_link'] = array(
+      'title' => t('Translation link'),
+      'help' => t('Provide a link to the translations overview for users.'),
+      'field' => array(
+        'id' => 'translation_entity_link',
+      ),
+    );
+  }
+
   $data['users']['edit_node'] = array(
     'field' => array(
       'title' => t('Edit link'),