function block_page_top in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/block/block.module \block_page_top()

Implements hook_page_top().

File

core/modules/block/block.module, line 67

Controls the visual building blocks a page is constructed with.

Code

function block_page_top(array &$page_top) {
  if (\Drupal::routeMatch()
    ->getRouteName() === 'block.admin_demo') {
    $theme = \Drupal::theme()
      ->getActiveTheme()
      ->getName();
    $page_top['backlink'] = [
      '#type' => 'link',
      '#title' => t('Exit block region demonstration'),
      '#options' => [
        'attributes' => [
          'class' => [
            'block-demo-backlink',
          ],
        ],
      ],
      '#weight' => -10,
    ];
    if (\Drupal::config('system.theme')
      ->get('default') == $theme) {
      $page_top['backlink']['#url'] = Url::fromRoute('block.admin_display');
    }
    else {
      $page_top['backlink']['#url'] = Url::fromRoute('block.admin_display_theme', [
        'theme' => $theme,
      ]);
    }
  }
}