$regions = array_fill_keys($layout_definition->getRegionNames(), []);
foreach ($fields as $name => $field) {
- // Move the field from the top-level of $build into a region-specific
- // section.
+ // If the region is controlled by the layout, move the field from the
+ // top-level of $build into a region-specific section. Custom regions
+ // could be set by other code at run-time; these should be ignored.
// @todo Ideally the array structure would remain unchanged, see
// https://www.drupal.org/node/2846393.
- $regions[$field['region']][$name] = $build[$name];
- unset($build[$name]);
+ if (isset($regions[$field['region']])) {
+ $regions[$field['region']][$name] = $build[$name];
+ unset($build[$name]);
+ }
}
// Ensure this will not conflict with any existing array elements by
// prefixing with an underscore.
// avoids breaking hook_form_alter() implementations by not actually
// moving the field in the form structure. If a #group is already set,
// do not overwrite it.
- if (!isset($build[$name]['#group'])) {
+ if (isset($regions[$field['region']]) && !isset($build[$name]['#group'])) {
$build[$name]['#group'] = $field['region'];
}
}