720 lines
24 KiB
PHP
720 lines
24 KiB
PHP
<?php
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/**
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* @file
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* Functions to support theming in the Olivero theme.
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*/
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use Drupal\olivero\OliveroPreRender;
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use Drupal\Component\Utility\Html;
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use Drupal\Core\Form\FormStateInterface;
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use Drupal\Core\Template\Attribute;
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use Drupal\Core\Render\Element;
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use Drupal\user\UserInterface;
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/**
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* Implements hook_preprocess_HOOK() for HTML document templates.
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*
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* Adds body classes if certain regions have content.
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*/
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function olivero_preprocess_html(&$variables): void {
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if (theme_get_setting('mobile_menu_all_widths') === 1) {
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$variables['attributes']['class'][] = 'is-always-mobile-nav';
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}
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// Convert custom hex to hsl so we can use the hue value
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$brand_color_hex = theme_get_setting('base_primary_color') ?? '#1b9ae4';
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[$h, $s, $l] = _olivero_hex_to_hsl($brand_color_hex);
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$variables['html_attributes']->setAttribute('style', "--color--primary-hue:$h;--color--primary-saturation:$s%;--color--primary-lightness:$l");
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// So fonts can be preloaded from base theme in the event Olivero is used as a
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// subtheme.
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$variables['olivero_path'] = \Drupal::request()->getBasePath() . '/' . \Drupal::service('extension.list.theme')->getPath('olivero');
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$query_string = \Drupal::service('asset.query_string')->get();
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// Create render array with noscript tag to output non-JavaScript
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// stylesheet for primary menu.
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$variables['noscript_styles'] = [
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'#type' => 'html_tag',
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'#noscript' => TRUE,
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'#tag' => 'link',
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'#attributes' => [
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'rel' => 'stylesheet',
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'href' => $variables['olivero_path'] . '/css/components/navigation/nav-primary-no-js.css?' . $query_string,
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],
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];
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}
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/**
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* Implements hook_preprocess_HOOK() for page title templates.
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*/
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function olivero_preprocess_page_title(&$variables): void {
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// Since the title and the shortcut link are both block level elements,
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// positioning them next to each other is much simpler with a wrapper div.
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if (!empty($variables['title_suffix']['add_or_remove_shortcut']) && $variables['title']) {
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// Add a wrapper div using the title_prefix and title_suffix render
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// elements.
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$variables['title_prefix']['shortcut_wrapper'] = [
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'#markup' => '<div class="shortcut-wrapper">',
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'#weight' => 100,
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];
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$variables['title_suffix']['shortcut_wrapper'] = [
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'#markup' => '</div>',
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'#weight' => -99,
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];
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// Make sure the shortcut link is the first item in title_suffix.
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$variables['title_suffix']['add_or_remove_shortcut']['#weight'] = -100;
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}
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// Unset shortcut link on front page.
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$variables['is_front'] = \Drupal::service('path.matcher')->isFrontPage();
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if ($variables['is_front'] === TRUE) {
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unset($variables['title_suffix']['add_or_remove_shortcut']);
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}
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}
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/**
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* Implements hook_preprocess_HOOK() for maintenance-page.html.twig.
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*/
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function olivero_preprocess_maintenance_page(&$variables): void {
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// By default, site_name is set to Drupal if no db connection is available
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// or during site installation. Setting site_name to an empty string makes
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// the site and update pages look cleaner.
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// @see template_preprocess_maintenance_page
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if (!$variables['db_is_active']) {
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$variables['site_name'] = '';
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}
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// Olivero has custom styling for the maintenance page.
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$variables['#attached']['library'][] = 'olivero/maintenance-page';
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}
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/**
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* Implements hook_preprocess_HOOK() for node.html.twig.
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*/
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function olivero_preprocess_node(&$variables): void {
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// Remove the "Add new comment" link on teasers or when the comment form is
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// displayed on the page.
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if ($variables['view_mode'] === 'teaser' || !empty($variables['content']['comments']['comment_form'])) {
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unset($variables['content']['links']['comment']['#links']['comment-add']);
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}
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// Apply custom date formatter to "date" field.
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if (!empty($variables['date']) && !empty($variables['display_submitted']) && $variables['display_submitted'] === TRUE) {
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$variables['date'] = \Drupal::service('date.formatter')->format($variables['node']->getCreatedTime(), 'olivero_medium');
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}
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// Pass layout variable to template if content type is article in full view
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// mode. This is then used in the template to create a BEM style CSS class to
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// control the layout.
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if ($variables['node']->bundle() === 'article' && $variables['view_mode'] === 'full') {
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$variables['layout'] = 'content-narrow';
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}
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}
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/**
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* Implements hook_preprocess_HOOK() for block.html.twig.
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*/
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function olivero_preprocess_block(&$variables): void {
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if (!empty($variables['elements']['#id'])) {
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/** @var \Drupal\block\BlockInterface $block */
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$block = \Drupal::entityTypeManager()
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->getStorage('block')
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->load($variables['elements']['#id']);
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if ($block) {
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$region = $block->getRegion();
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if ($variables['base_plugin_id'] === 'system_menu_block') {
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$variables['content']['#attributes']['region'] = $region;
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if ($region === 'sidebar') {
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$variables['#attached']['library'][] = 'olivero/menu-sidebar';
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}
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}
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if ($variables['base_plugin_id'] === 'search_form_block') {
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if ($region === 'primary_menu') {
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$variables['#attached']['library'][] = 'olivero/search-narrow';
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$variables['content']['actions']['submit']['#theme_wrappers'] = ['input__submit__header_search'];
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}
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elseif ($region === 'secondary_menu') {
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$variables['#attached']['library'][] = 'olivero/search-wide';
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$variables['content']['actions']['submit']['#theme_wrappers'] = ['input__submit__header_search'];
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}
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}
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}
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}
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if ($variables['plugin_id'] === 'system_branding_block') {
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$site_branding_color = theme_get_setting('site_branding_bg_color');
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if ($site_branding_color && $site_branding_color !== 'default') {
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$variables['attributes']['class'][] = 'site-branding--bg-' . $site_branding_color;
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}
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}
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// Add a primary-nav class to main menu navigation block.
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if ($variables['plugin_id'] === 'system_menu_block:main') {
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$variables['attributes']['class'][] = 'primary-nav';
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}
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}
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/**
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* Implements hook_theme_suggestions_HOOK_alter() for menu.
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*/
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function olivero_theme_suggestions_menu_alter(&$suggestions, array $variables): void {
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if (isset($variables['attributes']['region'])) {
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$suggestions[] = 'menu__' . $variables['attributes']['region'];
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}
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}
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/**
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* Implements hook_preprocess_HOOK().
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*/
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function olivero_preprocess_menu(&$variables): void {
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if (isset($variables['attributes']['region'])) {
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if ($variables['attributes']['region'] === 'sidebar') {
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$variables['attributes']['class'][] = 'menu--sidebar';
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}
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unset($variables['attributes']['region']);
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}
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}
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/**
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* Implements hook_theme_suggestions_HOOK_alter() for form templates.
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*/
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function olivero_theme_suggestions_form_alter(array &$suggestions, array $variables): void {
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if ($variables['element']['#form_id'] === 'search_block_form') {
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$suggestions[] = 'form__search_block_form';
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}
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}
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/**
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* Implements hook_form_alter() for adding classes and placeholder text to the search forms.
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*/
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function olivero_form_alter(&$form, FormStateInterface $form_state, $form_id): void {
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if (isset($form['actions']['submit']) && (count($form['actions'])) <= 2) {
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$form['actions']['submit']['#attributes']['class'][] = 'button--primary';
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}
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switch ($form_id) {
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case 'search_block_form':
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// Add placeholder text to keys input.
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$form['keys']['#attributes']['placeholder'] = t('Search by keyword or phrase.');
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// Add classes to the search form submit input.
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$form['actions']['submit']['#attributes']['class'][] = 'search-form__submit';
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break;
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case 'search_form':
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$form['basic']['keys']['#attributes']['placeholder'] = t('Search by keyword or phrase.');
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$form['basic']['submit']['#attributes']['class'][] = 'button--primary';
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$form['advanced']['submit']['#attributes']['class'][] = 'button--primary';
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break;
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}
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}
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/**
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* Implements hook_theme_suggestions_HOOK_alter() for block().
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*/
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function olivero_theme_suggestions_block_alter(&$suggestions, array $variables): void {
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if (!empty($variables['elements']['#id'])) {
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/** @var \Drupal\block\BlockInterface $block */
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$block = \Drupal::entityTypeManager()
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->getStorage('block')
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->load($variables['elements']['#id']);
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if ($block) {
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// Add region-specific block theme suggestions.
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$region = $block
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->getRegion();
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$suggestions[] = 'block__' . $region;
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$suggestions[] = 'block__' . $region . '__plugin_id__' . $variables['elements']['#plugin_id'];
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$suggestions[] = 'block__' . $region . '__id__' . $variables['elements']['#id'];
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}
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}
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}
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/**
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* Implements hook_preprocess_HOOK() for menu-local-tasks templates.
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*/
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function olivero_preprocess_menu_local_tasks(&$variables): void {
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foreach (Element::children($variables['primary']) as $key) {
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$variables['primary'][$key]['#level'] = 'primary';
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}
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foreach (Element::children($variables['secondary']) as $key) {
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$variables['secondary'][$key]['#level'] = 'secondary';
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}
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}
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/**
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* Implements hook_preprocess_form_element().
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*/
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function olivero_preprocess_form_element(&$variables): void {
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if (in_array($variables['element']['#type'] ?? FALSE, ['checkbox', 'radio'], TRUE)) {
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$variables['attributes']['class'][] = 'form-type-boolean';
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}
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if (!empty($variables['description']['attributes'])) {
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$variables['description']['attributes']->addClass('form-item__description');
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}
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if ($variables['disabled']) {
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$variables['label']['#attributes']['class'][] = 'is-disabled';
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}
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}
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/**
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* Implements hook_preprocess_HOOK().
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*/
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function olivero_preprocess_form_element_label(&$variables): void {
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$variables['attributes']['class'][] = 'form-item__label';
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}
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/**
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* Implements hook_preprocess_HOOK().
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*/
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function olivero_preprocess_input(&$variables): void {
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if (
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!empty($variables['element']['#title_display']) &&
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$variables['element']['#title_display'] === 'attribute' &&
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!empty((string) $variables['element']['#title'])
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) {
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$variables['attributes']['title'] = (string) $variables['element']['#title'];
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}
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$type_api = $variables['element']['#type'];
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$type_html = $variables['attributes']['type'];
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$text_types_html = [
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'text',
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'email',
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'tel',
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'number',
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'search',
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'password',
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'date',
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'time',
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'file',
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'color',
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'datetime-local',
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'url',
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'month',
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'week',
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];
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if (in_array($type_html, $text_types_html, TRUE)) {
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$variables['attributes']['class'][] = 'form-element';
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$variables['attributes']['class'][] = Html::getClass('form-element--type-' . $type_html);
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$variables['attributes']['class'][] = Html::getClass('form-element--api-' . $type_api);
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// This logic is functioning as expected, but there is nothing in the theme
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// that renders the result. As a result it can't currently be covered by a
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// functional test.
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if (!empty($variables['element']['#autocomplete_route_name'])) {
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$variables['autocomplete_message'] = t('Loading…');
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}
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}
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if (in_array($type_html, ['checkbox', 'radio'], TRUE)) {
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$variables['attributes']['class'][] = 'form-boolean';
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$variables['attributes']['class'][] = Html::getClass('form-boolean--type-' . $type_html);
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}
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}
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/**
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* Implements hook_preprocess_HOOK().
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*/
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function olivero_preprocess_textarea(&$variables): void {
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$variables['attributes']['class'][] = 'form-element';
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$variables['attributes']['class'][] = 'form-element--type-textarea';
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$variables['attributes']['class'][] = 'form-element--api-textarea';
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}
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/**
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* Implements hook_preprocess_HOOK().
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*/
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function olivero_preprocess_select(&$variables): void {
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$variables['attributes']['class'][] = 'form-element';
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$variables['attributes']['class'][] = $variables['element']['#multiple'] ?
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'form-element--type-select-multiple' :
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'form-element--type-select';
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}
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/**
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* Implements hook_preprocess_HOOK().
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*/
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function olivero_preprocess_checkboxes(&$variables): void {
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$variables['attributes']['class'][] = 'form-boolean-group';
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}
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/**
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* Implements hook_preprocess_HOOK().
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*/
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function olivero_preprocess_radios(&$variables): void {
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$variables['attributes']['class'][] = 'form-boolean-group';
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}
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/**
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* Implements hook_preprocess_HOOK().
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*/
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function olivero_preprocess_field(&$variables): void {
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$rich_field_types = ['text_with_summary', 'text', 'text_long'];
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if (in_array($variables['field_type'], $rich_field_types, TRUE)) {
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$variables['attributes']['class'][] = 'text-content';
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}
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if ($variables['field_type'] == 'image' && $variables['element']['#view_mode'] == 'full' && !$variables["element"]["#is_multiple"] && $variables['field_name'] !== 'user_picture') {
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$variables['attributes']['class'][] = 'wide-content';
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}
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}
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/**
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* Implements hook_preprocess_HOOK().
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*/
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function olivero_preprocess_field_multiple_value_form(&$variables): void {
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// Make disabled available for the template.
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$variables['disabled'] = !empty($variables['element']['#disabled']);
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if (!empty($variables['multiple'])) {
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// Add an additional CSS class for the field label table cell.
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// This repeats the logic of template_preprocess_field_multiple_value_form()
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// without using '#prefix' and '#suffix' for the wrapper element.
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//
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// If the field is multiple, we don't have to check the existence of the
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// table header cell.
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//
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// @see template_preprocess_field_multiple_value_form().
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$header_attributes = ['class' => ['form-item__label', 'form-item__label--multiple-value-form']];
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if (!empty($variables['element']['#required'])) {
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$header_attributes['class'][] = 'js-form-required';
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$header_attributes['class'][] = 'form-required';
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}
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// Using array_key_first() for addressing the first header cell would be
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// more elegant here, but we can rely on the related theme.inc preprocess.
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// @todo change this after https://www.drupal.org/node/3099026 has landed.
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$variables['table']['#header'][0]['data'] = [
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'#type' => 'html_tag',
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'#tag' => 'h4',
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'#value' => $variables['element']['#title'],
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'#attributes' => $header_attributes,
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];
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if ($variables['disabled']) {
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$variables['table']['#attributes']['class'][] = 'tabledrag-disabled';
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$variables['table']['#attributes']['class'][] = 'js-tabledrag-disabled';
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// We will add the 'is-disabled' CSS class to the disabled table header
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// cells.
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$header_attributes['class'][] = 'is-disabled';
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foreach ($variables['table']['#header'] as &$cell) {
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if (is_array($cell) && isset($cell['data'])) {
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$cell = $cell + ['class' => []];
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$cell['class'][] = 'is-disabled';
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}
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else {
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// We have to modify the structure of this header cell.
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$cell = [
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'data' => $cell,
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'class' => ['is-disabled'],
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];
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}
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}
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}
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}
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}
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/**
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* Implements hook_preprocess_HOOK() for menu-local-task templates.
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*/
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function olivero_preprocess_menu_local_task(&$variables): void {
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$variables['link']['#options']['attributes']['class'][] = 'tabs__link';
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$variables['link']['#options']['attributes']['class'][] = 'js-tabs-link';
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// Ensure is-active class is set when the tab is active. The generic active
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// link handler applies stricter comparison rules than what is necessary for
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// tabs.
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if (isset($variables['is_active']) && $variables['is_active'] === TRUE) {
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$variables['link']['#options']['attributes']['class'][] = 'is-active';
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}
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if (isset($variables['element']['#level'])) {
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$variables['level'] = $variables['element']['#level'];
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}
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}
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/**
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* Implements template_preprocess_HOOK() for fieldset.
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*/
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function olivero_preprocess_fieldset(&$variables): void {
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$element = $variables['element'];
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$composite_types = ['checkboxes', 'radios'];
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if (!empty($element['#type']) && in_array($element['#type'], $composite_types) && !empty($variables['element']['#children_errors'])) {
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$variables['legend_span']['attributes']->addClass('has-error');
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}
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if (!empty($element['#disabled'])) {
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$variables['legend_span']['attributes']->addClass('is-disabled');
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if (!empty($variables['description']) && !empty($variables['description']['attributes'])) {
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$variables['description']['attributes']->addClass('is-disabled');
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}
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}
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// Remove 'container-inline' class from the main attributes and add a flag
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// instead.
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// @todo remove this after https://www.drupal.org/node/3059593 has been
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// resolved.
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if (!empty($variables['attributes']['class'])) {
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$container_inline_key = array_search('container-inline', $variables['attributes']['class']);
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if ($container_inline_key !== FALSE) {
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unset($variables['attributes']['class'][$container_inline_key]);
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$variables['inline_items'] = TRUE;
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}
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}
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}
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/**
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* Implements hook_theme_suggestions_HOOK_alter().
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*/
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function olivero_theme_suggestions_user_alter(&$suggestions, $variables): void {
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$suggestions[] = 'user__' . $variables['elements']['#view_mode'];
|
|
}
|
|
|
|
/**
|
|
* Implements hook_preprocess_HOOK().
|
|
*/
|
|
function olivero_preprocess_field__node__created(&$variables): void {
|
|
foreach (Element::children($variables['items']) as $item) {
|
|
unset($variables['items'][$item]['content']['#prefix']);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Implements hook_preprocess_HOOK() for setting classes.
|
|
*/
|
|
function olivero_preprocess_filter_caption(&$variables): void {
|
|
$variables['classes'] = isset($variables['classes']) && !empty($variables['classes']) ? $variables['classes'] . ' caption' : 'caption';
|
|
}
|
|
|
|
/**
|
|
* Implements hook_form_FORM_ID_alter().
|
|
*/
|
|
function olivero_form_node_preview_form_select_alter(&$form, FormStateInterface $form_state, $form_id): void {
|
|
$form['backlink']['#options']['attributes']['class'][] = 'button';
|
|
$form['backlink']['#options']['attributes']['class'][] = 'button--small';
|
|
$form['backlink']['#options']['attributes']['class'][] = 'button--icon-back';
|
|
$form['backlink']['#options']['attributes']['class'][] = 'button--primary';
|
|
$form['view_mode']['#attributes']['class'][] = 'form-element--small';
|
|
}
|
|
|
|
/**
|
|
* Implements hook_preprocess_HOOK() for comment.html.twig.
|
|
*/
|
|
function olivero_preprocess_comment(&$variables): void {
|
|
// Getting the node creation time stamp from the comment object.
|
|
$date = $variables['comment']->getCreatedTime();
|
|
// Formatting "created" as "X days ago".
|
|
$variables['created'] = t('@time ago', ['@time' => \Drupal::service('date.formatter')->formatInterval(\Drupal::time()->getRequestTime() - $date)]);
|
|
}
|
|
|
|
/**
|
|
* Implements hook_preprocess_HOOK() for field--comment.html.twig.
|
|
*/
|
|
function olivero_preprocess_field__comment(&$variables): void {
|
|
// Add a comment_count.
|
|
$variables['comment_count'] = count(array_filter($variables['comments'], 'is_numeric', ARRAY_FILTER_USE_KEY));
|
|
|
|
// Add user.compact to field-comment if profile's avatar of current user
|
|
// exist.
|
|
$user = \Drupal::currentUser();
|
|
if ($user->isAuthenticated() && $user instanceof UserInterface) {
|
|
if ($user->hasField('user_picture') && !$user->get('user_picture')->isEmpty()) {
|
|
$variables['user_picture'] = \Drupal::entityTypeManager()
|
|
->getViewBuilder('user')
|
|
->view($user, 'compact');
|
|
}
|
|
|
|
$variables['#cache']['contexts'][] = 'user';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Implements hook_element_info_alter().
|
|
*/
|
|
function olivero_element_info_alter(&$info): void {
|
|
if (array_key_exists('text_format', $info)) {
|
|
$info['text_format']['#pre_render'][] = [OliveroPreRender::class, 'textFormat'];
|
|
}
|
|
|
|
if (isset($info['status_messages'])) {
|
|
$info['status_messages']['#pre_render'][] = [OliveroPreRender::class, 'messagePlaceholder'];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Implements template_preprocess_text_format_wrapper().
|
|
*
|
|
* @todo Remove when https://www.drupal.org/node/3016343 is fixed.
|
|
*/
|
|
function olivero_preprocess_text_format_wrapper(&$variables): void {
|
|
$description_attributes = [];
|
|
if (!empty($variables['attributes']['id'])) {
|
|
$description_attributes['id'] = $variables['attributes']['aria-describedby'] = $variables['attributes']['id'];
|
|
unset($variables['attributes']['id']);
|
|
}
|
|
$variables['description_attributes'] = new Attribute($description_attributes);
|
|
}
|
|
|
|
/**
|
|
* Implements hook_preprocess_search_result().
|
|
*/
|
|
function olivero_preprocess_search_result(&$variables): void {
|
|
// Apply custom date formatter to "date" field.
|
|
if (!empty($variables['result']['date'])) {
|
|
$variables['info_date'] = \Drupal::service('date.formatter')->format($variables['result']['node']->getCreatedTime(), 'olivero_medium');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Implements hook_preprocess_item_list__search_results().
|
|
*/
|
|
function olivero_preprocess_item_list__search_results(&$variables): void {
|
|
if (isset($variables['empty'])) {
|
|
$variables['empty']['#attributes']['class'][] = 'empty-search-results-text';
|
|
$variables['empty']['#attached']['library'][] = 'olivero/search-results';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Implements hook_preprocess_links__comment().
|
|
*/
|
|
function olivero_preprocess_links__comment(&$variables): void {
|
|
foreach ($variables['links'] as &$link) {
|
|
$link['link']['#options']['attributes']['class'][] = 'comment__links-link';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Implements hook_preprocess_table().
|
|
*/
|
|
function olivero_preprocess_table(&$variables): void {
|
|
// Mark the whole table and the first cells if rows are draggable.
|
|
if (!empty($variables['rows'])) {
|
|
$draggable_row_found = FALSE;
|
|
foreach ($variables['rows'] as &$row) {
|
|
/** @var \Drupal\Core\Template\Attribute $row['attributes'] */
|
|
if (!empty($row['attributes']) && $row['attributes']->hasClass('draggable')) {
|
|
if (!$draggable_row_found) {
|
|
$variables['attributes']['class'][] = 'draggable-table';
|
|
$draggable_row_found = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Implements hook_form_views_exposed_form_alter().
|
|
*/
|
|
function olivero_form_views_exposed_form_alter(&$form): void {
|
|
$form['#attributes']['class'][] = 'form--inline';
|
|
}
|
|
|
|
/**
|
|
* Converts hex color strings to array of HSL values.
|
|
*
|
|
* @param string $hex_string
|
|
* The 6-character hexadecimal color code, optionally with a leading hash.
|
|
*
|
|
* @return array
|
|
* Array containing hue, saturation, and lightness values.
|
|
* $hue: integer of value 0-360 indicating the hue on a color wheel.
|
|
* $saturation: string of saturation as a percentage (0% all gray, 100% full
|
|
* color).
|
|
* $lightness: string of lightness as a percentage (0% darkened to black, 50%
|
|
* full color, 100% lightened to white).
|
|
*
|
|
* @see https://css-tricks.com/converting-color-spaces-in-javascript
|
|
* Code based on JS version.
|
|
* @see https://www.rapidtables.com/convert/color/rgb-to-hsl.html
|
|
* Mathematical formula for rgb-to-hsl conversion.
|
|
*
|
|
* @internal
|
|
*/
|
|
function _olivero_hex_to_hsl(string $hex_string) {
|
|
// Convert hexcode pairs to rgb values (0-255).
|
|
$hex_val = trim($hex_string, '#');
|
|
|
|
$r0 = $g0 = $b0 = '00';
|
|
|
|
if (strlen($hex_val) === 6) {
|
|
$r0 = hexdec($hex_val[0] . $hex_val[1]);
|
|
$g0 = hexdec($hex_val[2] . $hex_val[3]);
|
|
$b0 = hexdec($hex_val[4] . $hex_val[5]);
|
|
}
|
|
|
|
if (strlen($hex_val) === 3) {
|
|
$r0 = hexdec($hex_val[0] . $hex_val[0]);
|
|
$g0 = hexdec($hex_val[1] . $hex_val[1]);
|
|
$b0 = hexdec($hex_val[2] . $hex_val[2]);
|
|
}
|
|
|
|
// Convert rgb's 0-255 to decimal values.
|
|
$r = fdiv($r0, 255);
|
|
$g = fdiv($g0, 255);
|
|
$b = fdiv($b0, 255);
|
|
|
|
// Calculate Hue.
|
|
$c_min = min($r, $g, $b);
|
|
$c_max = max($r, $g, $b);
|
|
$delta = $c_max - $c_min;
|
|
|
|
if ($delta == 0) {
|
|
$h = 0;
|
|
}
|
|
else {
|
|
switch ($c_max) {
|
|
case $r:
|
|
$h = fmod((($g - $b) / $delta), 6);
|
|
break;
|
|
|
|
case $g:
|
|
$h = (($b - $r) / $delta) + 2;
|
|
break;
|
|
|
|
case $b:
|
|
$h = (($r - $g) / $delta) + 4;
|
|
break;
|
|
|
|
default:
|
|
$h = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
$h = round($h * 60);
|
|
|
|
// Shift hue range from [-60 - 300] to [0 - 360].
|
|
if ($h < 0) {
|
|
$h += 360;
|
|
}
|
|
|
|
// Calculate Lightness.
|
|
$l = ($c_max + $c_min) / 2;
|
|
|
|
// Calculate Saturation.
|
|
$s = $delta == 0 ? 0 : $delta / (1 - abs((2 * $l) - 1));
|
|
|
|
// Convert Saturation and Lightness to percentages.
|
|
$s = round($s * 100);
|
|
$l = round($l * 100);
|
|
|
|
return [$h, $s, $l];
|
|
}
|