protected function BlockListBuilder::buildBlocksForm

Builds the main "Blocks" portion of the form.

Return value

array

File

core/modules/block/src/BlockListBuilder.php, line 154

Class

BlockListBuilder

Defines a class to build a listing of block entities.

Namespace

Code

protected function buildBlocksForm() {

  // Build blocks first for each region.
  $blocks = [];
  $entities = $this
    ->load();

  /** @var \Drupal\block\BlockInterface[] $entities */
  foreach ($entities as $entity_id => $entity) {
    $definition = $entity
      ->getPlugin()
      ->getPluginDefinition();
    $blocks[$entity
      ->getRegion()][$entity_id] = [
      'label' => $entity
        ->label(),
      'entity_id' => $entity_id,
      'weight' => $entity
        ->getWeight(),
      'entity' => $entity,
      'category' => $definition['category'],
      'status' => $entity
        ->status(),
    ];
  }
  $form = [
    '#type' => 'table',
    '#header' => [
      $this
        ->t('Block'),
      $this
        ->t('Category'),
      $this
        ->t('Region'),
      $this
        ->t('Weight'),
      $this
        ->t('Operations'),
    ],
    '#attributes' => [
      'id' => 'blocks',
    ],
  ];

  // Weights range from -delta to +delta, so delta should be at least half
  // of the amount of blocks present. This makes sure all blocks in the same
  // region get a unique weight.
  $weight_delta = round(count($entities) / 2);
  $placement = FALSE;
  if ($this->request->query
    ->has('block-placement')) {
    $placement = $this->request->query
      ->get('block-placement');
    $form['#attached']['drupalSettings']['blockPlacement'] = $placement;

    // Remove the block placement from the current request so that it is not
    // passed on to any redirect destinations.
    $this->request->query
      ->remove('block-placement');
  }

  // Loop over each region and build blocks.
  $regions = $this
    ->systemRegionList($this
    ->getThemeName(), REGIONS_VISIBLE);
  foreach ($regions as $region => $title) {
    $form['#tabledrag'][] = [
      'action' => 'match',
      'relationship' => 'sibling',
      'group' => 'block-region-select',
      'subgroup' => 'block-region-' . $region,
      'hidden' => FALSE,
    ];
    $form['#tabledrag'][] = [
      'action' => 'order',
      'relationship' => 'sibling',
      'group' => 'block-weight',
      'subgroup' => 'block-weight-' . $region,
    ];
    $form['region-' . $region] = [
      '#attributes' => [
        'class' => [
          'region-title',
          'region-title-' . $region,
        ],
        'no_striping' => TRUE,
      ],
    ];
    $form['region-' . $region]['title'] = [
      '#theme_wrappers' => [
        'container' => [
          '#attributes' => [
            'class' => 'region-title__action',
          ],
        ],
      ],
      '#prefix' => $title,
      '#type' => 'link',
      '#title' => $this
        ->t('Place block <span class="visually-hidden">in the %region region</span>', [
        '%region' => $title,
      ]),
      '#url' => Url::fromRoute('block.admin_library', [
        'theme' => $this
          ->getThemeName(),
      ], [
        'query' => [
          'region' => $region,
        ],
      ]),
      '#wrapper_attributes' => [
        'colspan' => 5,
      ],
      '#attributes' => [
        'class' => [
          'use-ajax',
          'button',
          'button--small',
        ],
        'data-dialog-type' => 'modal',
        'data-dialog-options' => Json::encode([
          'width' => 880,
        ]),
      ],
    ];
    $form['region-' . $region . '-message'] = [
      '#attributes' => [
        'class' => [
          'region-message',
          'region-' . $region . '-message',
          empty($blocks[$region]) ? 'region-empty' : 'region-populated',
        ],
      ],
    ];
    $form['region-' . $region . '-message']['message'] = [
      '#markup' => '<em>' . $this
        ->t('No blocks in this region') . '</em>',
      '#wrapper_attributes' => [
        'colspan' => 5,
      ],
    ];
    if (isset($blocks[$region])) {
      foreach ($blocks[$region] as $info) {
        $entity_id = $info['entity_id'];
        $form[$entity_id] = [
          '#attributes' => [
            'class' => [
              'draggable',
            ],
          ],
        ];
        $form[$entity_id]['#attributes']['class'][] = $info['status'] ? 'block-enabled' : 'block-disabled';
        if ($placement && $placement == Html::getClass($entity_id)) {
          $form[$entity_id]['#attributes']['class'][] = 'color-success';
          $form[$entity_id]['#attributes']['class'][] = 'js-block-placed';
        }
        $form[$entity_id]['info'] = [
          '#wrapper_attributes' => [
            'class' => [
              'block',
            ],
          ],
        ];

        // Ensure that the label is always rendered as plain text. Render
        // array #plain_text key is essentially treated same as @ placeholder
        // in translatable markup.
        if ($info['status']) {
          $form[$entity_id]['info']['#plain_text'] = $info['label'];
        }
        else {
          $form[$entity_id]['info']['#markup'] = $this
            ->t('@label (disabled)', [
            '@label' => $info['label'],
          ]);
        }
        $form[$entity_id]['type'] = [
          '#markup' => $info['category'],
        ];
        $form[$entity_id]['region-theme']['region'] = [
          '#type' => 'select',
          '#default_value' => $region,
          '#required' => TRUE,
          '#title' => $this
            ->t('Region for @block block', [
            '@block' => $info['label'],
          ]),
          '#title_display' => 'invisible',
          '#options' => $regions,
          '#attributes' => [
            'class' => [
              'block-region-select',
              'block-region-' . $region,
            ],
          ],
          '#parents' => [
            'blocks',
            $entity_id,
            'region',
          ],
        ];
        $form[$entity_id]['region-theme']['theme'] = [
          '#type' => 'hidden',
          '#value' => $this
            ->getThemeName(),
          '#parents' => [
            'blocks',
            $entity_id,
            'theme',
          ],
        ];
        $form[$entity_id]['weight'] = [
          '#type' => 'weight',
          '#default_value' => $info['weight'],
          '#delta' => $weight_delta,
          '#title' => $this
            ->t('Weight for @block block', [
            '@block' => $info['label'],
          ]),
          '#title_display' => 'invisible',
          '#attributes' => [
            'class' => [
              'block-weight',
              'block-weight-' . $region,
            ],
          ],
        ];
        $form[$entity_id]['operations'] = $this
          ->buildOperations($info['entity']);
      }
    }
  }

  // Do not allow disabling the main system content block when it is present.
  if (isset($form['system_main']['region'])) {
    $form['system_main']['region']['#required'] = TRUE;
  }
  return $form;
}