function block_theme_initialize

Assigns an initial, default set of blocks for a theme.

This function is called the first time a new theme is installed. The new theme gets a copy of the default theme's blocks, with the difference that if a particular region isn't available in the new theme, the block is assigned to the new theme's default region.

Parameters

$theme: The name of a theme.

File

core/modules/block/block.module, line 122

Code

function block_theme_initialize($theme) {
    // Initialize theme's blocks if none already registered.
    $has_blocks = \Drupal::entityTypeManager()->getStorage('block')
        ->loadByProperties([
        'theme' => $theme,
    ]);
    if (!$has_blocks) {
        $default_theme = \Drupal::config('system.theme')->get('default');
        // Apply only to new theme's visible regions.
        $regions = system_region_list($theme, REGIONS_VISIBLE);
        $default_theme_blocks = \Drupal::entityTypeManager()->getStorage('block')
            ->loadByProperties([
            'theme' => $default_theme,
        ]);
        foreach ($default_theme_blocks as $default_theme_block_id => $default_theme_block) {
            if (str_starts_with($default_theme_block_id, $default_theme . '_')) {
                $id = str_replace($default_theme . '_', '', $default_theme_block_id);
            }
            else {
                $id = $default_theme_block_id;
            }
            $id = \Drupal::service('block.repository')->getUniqueMachineName($id, $theme);
            $block = $default_theme_block->createDuplicateBlock($id, $theme);
            // If the region isn't supported by the theme, assign the block to the
            // theme's default region.
            if (!isset($regions[$block->getRegion()])) {
                $block->setRegion(system_default_region($theme));
            }
            $block->save();
        }
    }
}