bear_skin.theme

<?php
/**
 * @file
 * Functions to support theming in the bear_skin theme.
 */

/**
 * Implements hook_preprocess_html().
 */
function bear_skin_preprocess_html(&$variables, $hook) {
  // Add variables and paths needed for HTML5 and responsive support.
  $variables['base_path'] = base_path();
  $variables['path_to_bear_skin'] = drupal_get_path('theme','bear_skin');
  $variables['is_front'] = \Drupal::service('path.matcher')->isFrontPage();

  // Add a class that tells us whether the page is viewed by an authenticated user or not.
  $variables['attributes']['class'][] = $variables['logged_in'] ? 'logged-in' : 'not-logged-in';

  // if the sticky footer option is selected, set a class
  if (theme_get_setting('sticky_footer')) {
    $variables['attributes']['class'][] = 'sticky-footer';
  }

  // adding classes for basic layouts
  if (!empty($variables['page']['sidebar_first']) && !empty($variables['page']['sidebar_second'])) {
    $variables['attributes']['class'][] = 'layout-two-sidebars';
  }
  elseif (!empty($variables['page']['sidebar_first'])) {
    $variables['attributes']['class'][] = 'layout-one-sidebar';
    $variables['attributes']['class'][] = 'layout-sidebar-first';
  }
  elseif (!empty($variables['page']['sidebar_second'])) {
    $variables['attributes']['class'][] = 'layout-one-sidebar';
    $variables['attributes']['class'][] = 'layout-sidebar-second';
  }
  else {
    $variables['attributes']['class'][] = 'layout-no-sidebars';
  }
}

/**
 * Implements hook_preprocess_region().
 */
function bear_skin_preprocess_region(&$variables) {
  $variables['attributes']['class'][] = 'region';
  $variables['attributes']['class'][] = 'region--' . $variables['elements']['#region'];
}

/**
 * Implements hook_preprocess_block().
 */
function bear_skin_preprocess_block(&$variables) {
  // All blocks get block and block__title classes.
  $variables['attributes']['class'][] = 'block';
  $variables['title_attributes']['class'][] = 'block__title';

  // plugin_id => class
  $map = array(
    // Site branding block.
    'system_branding_block' => 'block--branding',
    // Search form block.
    'search_form_block' => 'block--search-form',
    // Page title block.
    'page_title_block' => 'block--page-title',
    // Status messages block.
    'system_messages_block' => 'block--messages',
    // Tabs block.
    'local_tasks_block' => 'block--local-tasks',
    // Main page content block.
    'system_main_block' => 'block--main',
    // Powered by Drupal block.
    'system_powered_by_block' => 'block--powered-by'
  );

  if (array_key_exists($variables['plugin_id'], $map)) {
    // Block found in map.
    $variables['attributes']['class'][] = $map[$variables['plugin_id']];
  }
  elseif (substr($variables['plugin_id'], 0, 18) === 'system_menu_block:') {
    // Menu blocks, including main navigation.
    $variables['attributes']['class'][] = 'nav';
    $variables['attributes']['class'][] = 'nav--' . substr($variables['plugin_id'], 18);
  }
}

/**
 * Implements hook_preprocess_HOOK() for page-title.html.twig.
 */
function bear_skin_preprocess_page_title(&$variables) {
  $variables['title_attributes']['class'][] = 'page-title';
}

/**
 * Implements hook_preprocess_HOOK() for status-messages.html.twig.
 */
function bear_skin_preprocess_status_messages(&$variables) {
  $variables['attributes']['class'][] = 'messages';
}

/**
 * Implements hook_pre_render_HOOK() for menu-local-tasks templates.
 *
 * Use preprocess hook to convert menu_local_task into variables needed by the
 * tabs component.
 */
function bear_skin_preprocess_menu_local_tasks(&$variables) {
  foreach (array('primary', 'secondary') as $type) {
    $tabs = array();

    // Sort the tabs by #weight.
    uasort($variables[$type], array('Drupal\Component\Utility\SortArray', 'sortByWeightProperty'));

    foreach (array_keys($variables[$type]) as $key) {
      // Add the tab to a new array.
      $tabs[$key] = array(
        'active' => $variables[$type][$key]['#active'],
        'url' => $variables[$type][$key]['#link']['url']->toString(),
        'text' => \Drupal\Component\Utility\Html::escape($variables[$type][$key]['#link']['title'])
      );

      // Check if the tab should be shown by rendering the original.
      $link = drupal_render($variables[$type][$key]);
      if (!$link) {
        unset($tabs[$key]);
      }
    }

    // Overwrite the original tabs data.
    $variables[$type] = $tabs;
  }
}

/**
 * Implements hook_preprocess_HOOK() for node.html.twig.
 */
function bear_skin_preprocess_node(&$variables) {
  $variables['attributes']['class'][] = 'node';
  $variables['attributes']['class'][] = 'node--' . $variables['node']->getType();
  $variables['attributes']['class'][] = $variables['view_mode'];

  if ($variables['view_mode'] !== 'page') {
    $variables['title_attributes']['class'][] = 'node__title';
  }
}

function bear_skin_preprocess_links__node(&$variables) {
  $variables['attributes']['class'][] = 'node__links';
}

function bear_skin_preprocess_views_view(&$variables) {
  $variables['attributes']['class'][] = 'view';
  $variables['attributes']['class'][] = 'view--' . $variables['css_name'];
}

function bear_skin_preprocess_field(&$variables) {
  $variables['attributes']['class'][] = 'field';
  $variables['attributes']['class'][] = 'field--' . $variables['field_name'];
  $variables['title_attributes']['class'][] = 'field--comment__title';
}

function bear_skin_preprocess_comment(&$variables) {
  $variables['attributes']['class'][] = 'comment';
  $variables['title_attributes']['class'][] = 'comment__title';
  $url = $variables['elements']['#comment']->permalink();
  $options = $url->getOptions();
  $options['attributes']['class'][] = 'comment__permalink';
  $url->setOptions($options);
  $variables['permalink'] = \Drupal::l(t('Permalink'), $url);
  $variables['content_attributes']['class'][] = 'comment__content';
}

function bear_skin_preprocess_form(&$variables) {
  $variables['attributes']['class'][] = 'form';
}