shila_theme.theme

<?php

/**
 * @file
 * Functions to support theming in Shila theme.
 */

/**
 * Adds classes to field items.
 *
 * Implements hook_preprocess_HOOK() for field.html.twig.
 */
function shila_theme_preprocess_field(&$variables) {
  if ($variables['label_hidden']) {
    if ($variables['multiple']) {
      foreach ($variables['items'] as &$item) {
        $item['attributes']->addClass('field__item');
      }
    }
  }
  else {
    foreach ($variables['items'] as &$item) {
      $item['attributes']->addClass('field__item');
    }
  }
}

/**
 * Adds classes and generated links to menu items.
 *
 * Implements hook_preprocess_HOOK() for menu.html.twig.
 */
function shila_theme_preprocess_menu(&$variables) {
  _menu_links($variables['items'], 0, \Drupal::service('twig.extension'));
}

/**
 * Helper function for adding classes and generated links to menu items.
 */
function _menu_links(&$items, $menu_level, $twig_extension) {
  foreach ($items as &$item) {
    $classes = ['menu-item'];
    if ($item['is_expanded']) {
      $classes[] = 'menu-item--expanded';
    }
    if ($item['is_collapsed']) {
      $classes[] = 'menu-item--collapsed';
    }
    if ($item['in_active_trail']) {
      $classes[] = 'menu-item--active-trail';
    }
    $item['attributes']->addClass($classes);
    if ($item['title'] && $item['url']) {
      $item['link'] = $twig_extension->getLink($item['title'], $item['url']);
    }
    if ($item['below']) {
      _menu_links($item['below'], $menu_level + 1, $twig_extension);
    }
  }
}

/**
 * Removes specific attributes from pagers.
 *
 * Implements hook_preprocess_HOOK() for pager.html.twig.
 */
function shila_theme_preprocess_pager(&$variables) {
  $keys = [
    'first' => ['href', 'title'],
    'previous' => ['href', 'title', 'rel'],
    'next' => ['href', 'title', 'rel'],
    'last' => ['href', 'title'],
  ];
  foreach ($keys as $key => $remove) {
    _remove_attributes($variables, $key, $remove);
  }
  if (isset($variables['items']['pages'])) {
    foreach ($variables['items']['pages'] as $item) {
      if (isset($item['attributes'])) {
        $item['attributes']->removeAttribute('href')->removeAttribute('title');
      }
    }
  }
}

/**
 * Helper function for removing attributes.
 */
function _remove_attributes(&$variables, $key, $remove) {
  if (isset($variables['items'][$key]['attributes'])) {
    foreach ($remove as $attribute) {
      $variables['items'][$key]['attributes']->removeAttribute($attribute);
    }
  }
}

/**
 * Creates attributes for each message type.
 *
 * Implements template_preprocess_status_messages().
 */
function shila_theme_preprocess_status_messages(&$variables) {
  $variables['type_attributes'] = [];
  foreach ($variables['message_list'] as $type => $messages) {
    $attributes = $variables['attributes'];
    $attributes['class'][] = 'messages';
    $attributes['class'][] = 'messages--' . $type;
    unset($attributes['role']);
    unset($attributes['aria-label']);
    $variables['type_attributes'][$type] = new \Drupal\Core\Template\Attribute($attributes);
  }
}

/**
 * Conditionally adds default views classes.
 *
 * Implements template_preprocess_views_view_table().
 */
function shila_theme_preprocess_views_view_table(&$variables) {
  if ($variables['header']) {
    foreach ($variables['header'] as $key => &$column) {
      if ($column['default_classes']) {
        $column_classes = [
          'views-field',
          'views-field-' . $variables['fields'][$key]
        ];
        $column['attributes']->addClass($column_classes)->setAttribute('scope', 'col');
      }
    }
  }
  foreach ($variables['rows'] as &$row) {
    foreach ($row['columns'] as $key => &$column) {
      if ($column['default_classes']) {
        $column_classes = ['views-field'];
        foreach ($column['fields'] as $field) {
          $column_classes[] = 'views-field-' . $field;
        }
        $column['attributes']->addClass($column_classes);
      }
    }
  }
}

/**
 * Conditionally adds default views row classes.
 *
 * Implements template_preprocess_views_view_unformatted().
 */
function shila_theme_preprocess_views_view_unformatted(&$variables) {
  if ($variables['default_row_class']) {
    foreach ($variables['rows'] as &$row) {
      $row['attributes']->addClass('views-row');
    }
  }
}