www.aleph1.co.uk Git - yaffs-website/blob - web/modules/contrib/block_class/block_class.module

   1 <?php
   2
   3 /**
   4  * @file
   5  * Module for adding classes to blocks.
   6  */
   7
   8 use Drupal\block\Entity\Block;
   9
  10 /**
  11  * Implements hook_form_FORM_ID_alter().
  12  */
  13 function block_class_form_block_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
  14   if (\Drupal::currentUser()->hasPermission('administer block classes')) {
  15
  16     /** @var \Drupal\block\BlockInterface $block */
  17     $block = $form_state->getFormObject()->getEntity();
  18
  19     // This will automatically be saved in the third party settings.
  20     $form['third_party_settings']['#tree'] = TRUE;
  21     $form['third_party_settings']['block_class']['classes'] = array(
  22       '#type' => 'textfield',
  23       '#title' => t('CSS class(es)'),
  24       '#description' => t('Customize the styling of this block by adding CSS classes. Separate multiple classes by spaces.'),
  25       '#default_value' => $block->getThirdPartySetting('block_class', 'classes'),
  26     );
  27
  28   }
  29 }
  30
  31 /**
  32  * Implements hook_preprocess_HOOK().
  33  */
  34 function block_class_preprocess_block(&$variables) {
  35   // Blocks coming from page manager widget does not have id.
  36   if (!empty($variables['elements']['#id'])) {
  37     $block = Block::load($variables['elements']['#id']);
  38     if ($classes = $block->getThirdPartySetting('block_class', 'classes')) {
  39       $variables['attributes']['class'][] = $classes;
  40     }
  41   }
  42 }