function BlockForm::themeSwitch

Handles switching the available regions based on the selected theme.

File

core/modules/block/src/BlockForm.php, line 212

Class

BlockForm
Provides form for block instance forms.

Namespace

Drupal\block

Code

public function themeSwitch($form, FormStateInterface $form_state) {
  $form['region']['#options'] = system_region_list($form_state->getValue('theme'), REGIONS_VISIBLE);
  return $form['region'];
}

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