/**
* Returns instance of the layout plugin used by this page variant.
*
* @return \Drupal\layout_plugin\Plugin\Layout\LayoutInterface
* Layout plugin instance.
*/
public function getLayout()
{
if (!isset($this->layout)) {
$this->layout = Layout::layoutPluginManager()->createInstance($this->configuration['layout'], array());
}
return $this->layout;
}
/**
* Gets Display Suite layouts.
*/
public static function getLayouts()
{
static $layouts = FALSE;
if (!$layouts) {
$layouts = Layout::layoutPluginManager()->getDefinitions();
}
return $layouts;
}
/**
* Render API callback: builds the layout settings elements.
*/
public function layoutSettingsProcessCallback(array &$element, FormStateInterface $form_state, array &$complete_form)
{
$parents_base = $element['#parents'];
$layout_parent = array_merge($parents_base, ['layout']);
$layout_settings_parent = array_merge($parents_base, ['layout_settings']);
$settings_element =& $element['layout_settings_wrapper']['layout_settings'];
// Set the #parents on the layout_settings so they end up as a sibling of
// layout.
$layout_settings_parents = array_merge($element['#parents'], ['layout_settings']);
$settings_element['#parents'] = $layout_settings_parents;
$settings_element['#tree'] = TRUE;
// Get the layout name in a way that works regardless of whether we're
// getting the value via AJAX or not.
$layout_name = NestedArray::getValue($form_state->getUserInput(), $layout_parent) ?: $element['layout']['#default_value'];
// Place the layout settings on the form if a layout is selected.
if ($layout_name) {
$layout = Layout::layoutPluginManager()->createInstance($layout_name, $form_state->getValue($layout_settings_parent, $this->configuration['layout_settings'] ?: []));
$settings_element = $layout->buildConfigurationForm($settings_element, $form_state);
}
// Store the array parents for our element so that we can use it to pull out
// the layout settings in the validate and submit functions.
$complete_form['#variant_array_parents'] = $element['#array_parents'];
return $element;
}
