public function ParagraphsBackgroundPlugin::view in Paragraphs Collection 8

Extends the paragraph render array with behavior.

Parameters

array &$build: A renderable array representing the paragraph. The module may add elements to $build prior to rendering. The structure of $build is a renderable array as expected by drupal_render().

\Drupal\paragraphs\Entity\Paragraph $paragraph: The paragraph.

\Drupal\Core\Entity\Display\EntityViewDisplayInterface $display: The entity view display holding the display options configured for the entity components.

string $view_mode: The view mode the entity is rendered in.

Return value

array A render array provided by the plugin.

Overrides ParagraphsBehaviorInterface::view

File

modules/paragraphs_collection_demo/src/Plugin/paragraphs/Behavior/ParagraphsBackgroundPlugin.php, line 81

Class

ParagraphsBackgroundPlugin

Provides a background image feature plugin.

Namespace

Drupal\paragraphs_collection_demo\Plugin\paragraphs\Behavior

Code

public function view(array &$build, Paragraph $paragraphs_entity, EntityViewDisplayInterface $display, $view_mode) {
  $build['#attributes']['class'][] = 'paragraphs-behavior-background';
  $build['#attached']['library'][] = 'paragraphs_collection_demo/background';
  foreach (Element::children($build) as $field) {
    if ($field == $this->configuration['background_image_field']) {

      // Put the selected field into the background.
      $build[$field]['#attributes']['class'][] = 'paragraphs-behavior-background--image';
    }
    else {

      // Identify all other elements to put them on top of the background.
      $build[$field]['#attributes']['class'][] = 'paragraphs-behavior-background--element';
    }
  }
}