--- /dev/null
+<?php
+
+namespace Drupal\views\Plugin\Block;
+
+use Drupal\Component\Utility\Xss;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\views\Element\View;
+use Drupal\Core\Entity\EntityInterface;
+
+/**
+ * Provides a generic Views block.
+ *
+ * @Block(
+ * id = "views_block",
+ * admin_label = @Translation("Views Block"),
+ * deriver = "Drupal\views\Plugin\Derivative\ViewsBlock"
+ * )
+ */
+class ViewsBlock extends ViewsBlockBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function build() {
+ $this->view->display_handler->preBlockBuild($this);
+
+ $args = [];
+ foreach ($this->view->display_handler->getHandlers('argument') as $argument_name => $argument) {
+ // Initialize the argument value. Work around a limitation in
+ // \Drupal\views\ViewExecutable::_buildArguments() that skips processing
+ // later arguments if an argument with default action "ignore" and no
+ // argument is provided.
+ $args[$argument_name] = $argument->options['default_action'] == 'ignore' ? 'all' : NULL;
+
+ if (!empty($this->context[$argument_name])) {
+ if ($value = $this->context[$argument_name]->getContextValue()) {
+
+ // Context values are often entities, but views arguments expect to
+ // receive just the entity ID, convert it.
+ if ($value instanceof EntityInterface) {
+ $value = $value->id();
+ }
+ $args[$argument_name] = $value;
+ }
+ }
+ }
+
+ // We ask ViewExecutable::buildRenderable() to avoid creating a render cache
+ // entry for the view output by passing FALSE, because we're going to cache
+ // the whole block instead.
+ if ($output = $this->view->buildRenderable($this->displayID, array_values($args), FALSE)) {
+ // Before returning the block output, convert it to a renderable array
+ // with contextual links.
+ $this->addContextualLinks($output);
+
+ // Block module expects to get a final render array, without another
+ // top-level #pre_render callback. So, here we make sure that Views'
+ // #pre_render callback has already been applied.
+ $output = View::preRenderViewElement($output);
+
+ // Override the label to the dynamic title configured in the view.
+ if (empty($this->configuration['views_label']) && $this->view->getTitle()) {
+ $output['#title'] = ['#markup' => $this->view->getTitle(), '#allowed_tags' => Xss::getHtmlTagList()];
+ }
+
+ // When view_build is empty, the actual render array output for this View
+ // is going to be empty. In that case, return just #cache, so that the
+ // render system knows the reasons (cache contexts & tags) why this Views
+ // block is empty, and can cache it accordingly.
+ if (empty($output['view_build'])) {
+ $output = ['#cache' => $output['#cache']];
+ }
+
+ return $output;
+ }
+
+ return [];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getConfiguration() {
+ $configuration = parent::getConfiguration();
+
+ // Set the label to the static title configured in the view.
+ if (!empty($configuration['views_label'])) {
+ $configuration['label'] = $configuration['views_label'];
+ }
+
+ return $configuration;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function defaultConfiguration() {
+ $settings = parent::defaultConfiguration();
+
+ if ($this->displaySet) {
+ $settings += $this->view->display_handler->blockSettings($settings);
+ }
+
+ // Set custom cache settings.
+ if (isset($this->pluginDefinition['cache'])) {
+ $settings['cache'] = $this->pluginDefinition['cache'];
+ }
+
+ return $settings;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function blockForm($form, FormStateInterface $form_state) {
+ if ($this->displaySet) {
+ return $this->view->display_handler->blockForm($this, $form, $form_state);
+ }
+
+ return [];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function blockValidate($form, FormStateInterface $form_state) {
+ if ($this->displaySet) {
+ $this->view->display_handler->blockValidate($this, $form, $form_state);
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function blockSubmit($form, FormStateInterface $form_state) {
+ parent::blockSubmit($form, $form_state);
+ if ($this->displaySet) {
+ $this->view->display_handler->blockSubmit($this, $form, $form_state);
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getMachineNameSuggestion() {
+ $this->view->setDisplay($this->displayID);
+ return 'views_block__' . $this->view->storage->id() . '_' . $this->view->current_display;
+ }
+
+}