Same name in other branches

1. 9 core/modules/block/src/Controller/BlockController.php \Drupal\block\Controller\BlockController::demo()
2. 8.9.x core/modules/block/src/Controller/BlockController.php \Drupal\block\Controller\BlockController::demo()
3. 11.x core/modules/block/src/Controller/BlockController.php \Drupal\block\Controller\BlockController::demo()

Returns a block theme demo page.

Parameters

string $theme: The name of the theme.

Return value

array A #type 'page' render array containing the block region demo.

1 string reference to 'BlockController::demo'

block.routing.yml in core/modules/block/block.routing.yml

core/modules/block/block.routing.yml

File

core/modules/block/src/Controller/BlockController.php, line 59

Class

BlockController

Controller routines for admin block routes.

Namespace

Drupal\block\Controller

Code

public function demo($theme) {
    if (!$this->themeHandler
        ->hasUi($theme)) {
        throw new NotFoundHttpException();
    }
    $page = [
        '#title' => Html::escape($this->themeHandler
            ->getName($theme)),
        '#type' => 'page',
        '#attached' => [
            'drupalSettings' => [
                // The block demonstration page is not marked as an administrative
                // page by \Drupal::service('router.admin_context')->isAdminRoute()
                // function in order to use the frontend theme. Since JavaScript
                // relies on a proper separation of admin pages, it needs to know this
                // is an actual administrative page.
'path' => [
                    'currentPathIsAdmin' => TRUE,
                ],
            ],
            'library' => [
                'block/drupal.block.admin',
            ],
        ],
    ];
    // Show descriptions in each visible page region, nothing else.
    $visible_regions = $this->getVisibleRegionNames($theme);
    foreach (array_keys($visible_regions) as $region) {
        $page[$region]['block_description'] = [
            '#type' => 'inline_template',
            '#template' => '<div class="block-region demo-block">{{ region_name }}</div>',
            '#context' => [
                'region_name' => $visible_regions[$region],
            ],
        ];
    }
    return $page;
}

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