--- /dev/null
+<?php
+
+namespace Drupal\entity_browser\Plugin\EntityBrowser\SelectionDisplay;
+
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\entity_browser\SelectionDisplayBase;
+use Drupal\views\Views;
+use Drupal\views\Entity\View as ViewEntity;
+
+/**
+ * Displays current selection in a View.
+ *
+ * @EntityBrowserSelectionDisplay(
+ * id = "view",
+ * label = @Translation("View selection display"),
+ * description = @Translation("Use a pre-configured view as selection area."),
+ * acceptPreselection = TRUE,
+ * provider = "views",
+ * js_commands = FALSE
+ * )
+ */
+class View extends SelectionDisplayBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function defaultConfiguration() {
+ return array(
+ 'view' => NULL,
+ 'view_display' => NULL,
+ ) + parent::defaultConfiguration();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getForm(array &$original_form, FormStateInterface $form_state) {
+ $form = [];
+
+ // TODO - do we need better error handling for view and view_display (in case
+ // either of those is nonexistent or display not of correct type)?
+ $storage = &$form_state->getStorage();
+ if (empty($storage['selection_display_view']) || $form_state->isRebuilding()) {
+ $storage['selection_display_view'] = $this->entityTypeManager
+ ->getStorage('view')
+ ->load($this->configuration['view'])
+ ->getExecutable();
+ }
+
+ // TODO - if there are entities that are selected multiple times this displays
+ // them only once. Reason for that is how SQL and Views work and we probably
+ // can't do much about it.
+ $selected_entities = $form_state->get(['entity_browser', 'selected_entities']);
+ if (!empty($selected_entities)) {
+ $ids = array_map(function (EntityInterface $item) {
+ return $item->id();
+ }, $selected_entities);
+ $storage['selection_display_view']->setArguments([implode(',', $ids)]);
+ }
+
+ $form['view'] = $storage['selection_display_view']->executeDisplay($this->configuration['view_display']);
+
+ $form['use_selected'] = array(
+ '#type' => 'submit',
+ '#value' => $this->t('Use selection'),
+ '#name' => 'use_selected',
+ );
+
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submit(array &$form, FormStateInterface $form_state) {
+ if ($form_state->getTriggeringElement()['#name'] == 'use_selected') {
+ $this->selectionDone($form_state);
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+ $options = [];
+
+ // Get all views displays.
+ $views = Views::getAllViews();
+ foreach ($views as $view_id => $view) {
+ foreach ($view->get('display') as $display_id => $display) {
+ $options[$view_id . '.' . $display_id] = $this->t('@view : @display', array('@view' => $view->label(), '@display' => $display['display_title']));
+ }
+ }
+
+ $form['view'] = [
+ '#type' => 'select',
+ '#title' => $this->t('View : View display'),
+ '#default_value' => $this->configuration['view'] . '.' . $this->configuration['view_display'],
+ '#options' => $options,
+ '#required' => TRUE,
+ '#description' => $this->t('View display to use for displaying currently selected items. Do note that to get something usefull out of this display, its first contextual filter should be a filter on the primary identifier field of your entity type (e.g., Node ID, Media ID).'),
+ ];
+
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
+ $values = $form_state->getValues();
+
+ if (!empty($values['view'])) {
+ list($view_id, $display_id) = explode('.', $values['view']);
+ $this->configuration['view'] = $view_id;
+ $this->configuration['view_display'] = $display_id;
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function calculateDependencies() {
+ $dependencies = [];
+ if ($this->configuration['view']) {
+ $view = ViewEntity::load($this->configuration['view']);
+ $dependencies[$view->getConfigDependencyKey()] = [$view->getConfigDependencyName()];
+ }
+ return $dependencies;
+ }
+
+}