Issue #2888733: Drupal 8 version

src/Plugin/views/area/ViewsBlockArea.php

@@ -0,0 +1,120 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\block\Plugin\views\area\Block.
+ */
+
+namespace Drupal\views_block_area\Plugin\views\area;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\views\Plugin\views\area\AreaPluginBase;
+
+/**
+ * Provides an area handler which renders a block entity in a certain view mode.
+ *
+ * @ingroup views_area_handlers
+ *
+ * @ViewsArea("views_block_area")
+ */
+class ViewsBlockArea extends AreaPluginBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function defineOptions() {
+    $options = parent::defineOptions();
+
+    $options['block_id'] = ['default' => NULL];
+
+    return $options;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
+    parent::buildOptionsForm($form, $form_state);
+
+    $options = [];
+    /** @var \Drupal\block_field\BlockFieldManagerInterface $block_field_manager */
+    $block_field_manager = \Drupal::service('block_field.manager');
+    $definitions = $block_field_manager->getBlockDefinitions();
+    foreach ($definitions as $id => $definition) {
+      // If allowed plugin ids are set then check that this block should be
+      // included.
+      $category = (string) $definition['category'];
+      $options[$category][$id] = $definition['admin_label'];
+    }
+
+    $form['block_id'] = [
+      '#type' => 'select',
+      '#title' => $this->t('Block'),
+      '#options' => $options,
+      '#empty_option' => $this->t('Please select'),
+      '#default_value' => $this->options['block_id'],
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function render($empty = FALSE) {
+    $element = [];
+    /** @var \Drupal\block_field\BlockFieldItemInterface $item */
+    $block_instance = $this->getBlock();
+    // Make sure the block exists and is accessible.
+    if (!$block_instance || !$block_instance->access(\Drupal::currentUser())) {
+      return NULL;
+    }
+
+    // @see \Drupal\block\BlockViewBuilder::buildPreRenderableBlock
+    // @see template_preprocess_block()
+    $element = [
+      '#theme' => 'block',
+      '#attributes' => [],
+      '#configuration' => $block_instance->getConfiguration(),
+      '#plugin_id' => $block_instance->getPluginId(),
+      '#base_plugin_id' => $block_instance->getBaseId(),
+      '#derivative_plugin_id' => $block_instance->getDerivativeId(),
+      '#id' => $block_instance->getPluginId(),
+      'content' => $block_instance->build(),
+    ];
+    /** @var \Drupal\Core\Render\RendererInterface $renderer */
+    $renderer = \Drupal::service('renderer');
+    $renderer->addCacheableDependency($element, $block_instance);
+    return $element;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getBlock() {
+    if (empty($this->options['block_id'])) {
+      return NULL;
+    }
+
+    /** @var \Drupal\Core\Block\BlockManagerInterface $block_manager */
+    $block_manager = \Drupal::service('plugin.manager.block');
+
+    /** @var \Drupal\Core\Block\BlockPluginInterface $block_instance */
+    $block_instance = $block_manager->createInstance($this->options['block_id'], []);
+
+    $plugin_definition = $block_instance->getPluginDefinition();
+
+    // Don't return broken block plugin instances.
+    if ($plugin_definition['id'] == 'broken') {
+      return NULL;
+    }
+
+    // Don't return broken block content instances.
+    if ($plugin_definition['id'] == 'block_content') {
+      $uuid = $block_instance->getDerivativeId();
+      if (!\Drupal::entityManager()->loadEntityByUuid('block_content', $uuid)) {
+        return NULL;
+      }
+    }
+
+    return $block_instance;
+  }
+}

views_block_area.info.yml

@@ -0,0 +1,7 @@
+name: Views block area
+type: module
+description: Exposes all blocks as a views area.
+core: 8.x
+package: Views
+dependencies:
+  - views

views_block_area.views.inc

@@ -0,0 +1,23 @@
+<<?php
+
+/**
+ * @file
+ * Provide views data for views_block_area module.
+ */
+
+/**
+ * Implements hook_views_data().
+ */
+function views_block_area_views_data() {
+  $data = [];
+
+  $data['views']['views_block_area'] = [
+    'title' => t('Block area'),
+    'help' => t('Insert a block inside an area.'),
+    'area' => [
+      'id' => 'views_block_area',
+    ],
+  ];
+
+  return $data;
+}