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694 lines
23 KiB
694 lines
23 KiB
<?php |
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/** |
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* @file |
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* Functions to support theming in the Olivera theme. |
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*/ |
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use Drupal\olivera\OliveraPreRender; |
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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 olivera_preprocess_html(&$variables) { |
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if (theme_get_setting('mobile_menu_all_widths') === 1) { |
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$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, $l] = _olivera_hex_to_hsl($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 Olivera is used as a subtheme. |
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$variables['olivera_path'] = \Drupal::request()->getBasePath() . '/' . \Drupal::service('extension.list.theme')->getPath('olivera'); |
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$query_string = \Drupal::state()->get('system.css_js_query_string') ?: '0'; |
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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['olivera_path'] . '/css/components/navigation/nav-primary-no-js.css?' . $query_string, |
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], |
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]; |
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} |
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/** |
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* Implements hook_preprocess_HOOK() for page title templates. |
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*/ |
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function olivera_preprocess_page_title(&$variables) { |
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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($variables['title_suffix']['add_or_remove_shortcut']); |
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} |
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} |
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/** |
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* Implements hook_preprocess_HOOK() for maintenance-page.html.twig. |
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*/ |
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function olivera_preprocess_maintenance_page(&$variables) { |
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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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// Olivera has custom styling for the maintenance page. |
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$variables['#attached']['library'][] = 'olivera/maintenance-page'; |
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} |
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/** |
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* Implements hook_preprocess_HOOK() for node.html.twig. |
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*/ |
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function olivera_preprocess_node(&$variables) { |
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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 ($variables['teaser'] || !empty($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($variables['node']->getCreatedTime(), 'olivera_medium'); |
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} |
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// Pass layout variable to template if content type is article in full view |
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// mode. This is then used in the template to create a BEM style CSS class to |
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// control the layout. |
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if ($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 olivera_preprocess_block(&$variables) { |
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if (!empty($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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$variables['#attached']['library'][] = 'olivera/menu-sidebar'; |
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} |
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} |
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if ($variables['base_plugin_id'] === 'search_form_block') { |
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if ($region === 'primary_menu') { |
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$variables['#attached']['library'][] = 'olivera/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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$variables['#attached']['library'][] = 'olivera/search-wide'; |
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$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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$variables['attributes']['class'][] = 'primary-nav'; |
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} |
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} |
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/** |
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* Implements hook_theme_suggestions_HOOK_alter() for menu. |
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*/ |
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function olivera_theme_suggestions_menu_alter(&$suggestions, array $variables) { |
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if (isset($variables['attributes']['region'])) { |
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$suggestions[] = 'menu__' . $variables['attributes']['region']; |
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} |
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} |
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/** |
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* Implements hook_preprocess_HOOK(). |
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*/ |
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function olivera_preprocess_menu(&$variables) { |
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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 olivera_theme_suggestions_form_alter(array &$suggestions, array $variables) { |
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if ($variables['element']['#form_id'] === 'search_block_form') { |
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$suggestions[] = 'form__search_block_form'; |
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} |
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} |
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/** |
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* Implements hook_form_alter() for adding classes and placeholder text to the search forms. |
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*/ |
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function olivera_form_alter(&$form, FormStateInterface $form_state, $form_id) { |
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if (isset($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 olivera_theme_suggestions_block_alter(&$suggestions, array $variables) { |
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if (!empty($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' . '__' . $variables['elements']['#id']; |
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} |
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} |
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} |
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/** |
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* Implements hook_preprocess_HOOK() for menu-local-tasks templates. |
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*/ |
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function olivera_preprocess_menu_local_tasks(&$variables) { |
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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'][$key]['#level'] = 'secondary'; |
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} |
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} |
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/** |
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* Implements hook_preprocess_form_element(). |
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*/ |
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function olivera_preprocess_form_element(&$variables) { |
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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 olivera_preprocess_form_element_label(&$variables) { |
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$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 olivera_preprocess_input(&$variables) { |
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if ( |
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!empty($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-' . $type_api); |
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// This logic is functioning as expected, but there is nothing in the theme that renders the result. |
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// As a result it can't currently be covered by a functional test. |
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if (!empty($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-' . $type_html); |
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} |
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} |
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/** |
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* Implements hook_preprocess_HOOK(). |
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*/ |
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function olivera_preprocess_textarea(&$variables) { |
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$variables['attributes']['class'][] = 'form-element'; |
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$variables['attributes']['class'][] = 'form-element--type-textarea'; |
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$variables['attributes']['class'][] = 'form-element--api-textarea'; |
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} |
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/** |
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* Implements hook_preprocess_HOOK(). |
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*/ |
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function olivera_preprocess_select(&$variables) { |
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$variables['attributes']['class'][] = 'form-element'; |
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$variables['attributes']['class'][] = $variables['element']['#multiple'] ? |
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'form-element--type-select-multiple' : |
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'form-element--type-select'; |
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} |
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/** |
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* Implements hook_preprocess_HOOK(). |
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*/ |
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function olivera_preprocess_checkboxes(&$variables) { |
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$variables['attributes']['class'][] = 'form-boolean-group'; |
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} |
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/** |
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* Implements hook_preprocess_HOOK(). |
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*/ |
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function olivera_preprocess_radios(&$variables) { |
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$variables['attributes']['class'][] = 'form-boolean-group'; |
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} |
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/** |
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* Implements hook_preprocess_HOOK(). |
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*/ |
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function olivera_preprocess_field(&$variables) { |
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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-image'; |
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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 olivera_preprocess_field_multiple_value_form(&$variables) { |
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// Make disabled available for the template. |
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$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' => $cell, |
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'class' => ['is-disabled'], |
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]; |
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} |
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} |
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} |
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} |
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} |
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/** |
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* Implements hook_preprocess_HOOK() for menu-local-task templates. |
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*/ |
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function olivera_preprocess_menu_local_task(&$variables) { |
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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'] = $variables['element']['#level']; |
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} |
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} |
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/** |
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* Implements template_preprocess_HOOK() for fieldset. |
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*/ |
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function olivera_preprocess_fieldset(&$variables) { |
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$element = $variables['element']; |
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$composite_types = ['checkboxes', 'radios']; |
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|
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if (!empty($element['#type']) && in_array($element['#type'], $composite_types) && !empty($variables['element']['#children_errors'])) { |
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$variables['legend_span']['attributes']->addClass('has-error'); |
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} |
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|
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if (!empty($element['#disabled'])) { |
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$variables['legend_span']['attributes']->addClass('is-disabled'); |
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|
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if (!empty($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', $variables['attributes']['class']); |
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|
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if ($container_inline_key !== FALSE) { |
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unset($variables['attributes']['class'][$container_inline_key]); |
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$variables['inline_items'] = TRUE; |
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} |
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} |
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} |
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|
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/** |
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* Implements hook_theme_suggestions_HOOK_alter(). |
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*/ |
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function olivera_theme_suggestions_user_alter(&$suggestions, $variables) { |
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$suggestions[] = 'user__' . $variables['elements']['#view_mode']; |
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} |
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|
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/** |
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* Implements hook_preprocess_HOOK(). |
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*/ |
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function olivera_preprocess_field__node__created(&$variables) { |
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foreach (Element::children($variables['items']) as $item) { |
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unset($variables['items'][$item]['content']['#prefix']); |
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} |
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} |
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|
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/** |
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* Implements hook_preprocess_HOOK() for setting classes. |
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*/ |
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function olivera_preprocess_filter_caption(&$variables) { |
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$variables['classes'] = isset($variables['classes']) && !empty($variables['classes']) ? $variables['classes'] . ' caption' : 'caption'; |
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} |
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|
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/** |
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* Implements hook_form_FORM_ID_alter(). |
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*/ |
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function olivera_form_node_preview_form_select_alter(&$form, FormStateInterface $form_state, $form_id) { |
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$form['backlink']['#options']['attributes']['class'][] = 'button'; |
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$form['backlink']['#options']['attributes']['class'][] = 'button--small'; |
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$form['backlink']['#options']['attributes']['class'][] = 'button--icon-back'; |
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$form['backlink']['#options']['attributes']['class'][] = 'button--primary'; |
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$form['view_mode']['#attributes']['class'][] = 'form-element--small'; |
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} |
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/** |
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* Implements hook_preprocess_HOOK() for comment.html.twig. |
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*/ |
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function olivera_preprocess_comment(&$variables) { |
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// Getting the node creation time stamp from the comment object. |
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$date = $variables['comment']->getCreatedTime(); |
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// Formatting "created" as "X days ago". |
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$variables['created'] = t('@time ago', ['@time' => \Drupal::service('date.formatter')->formatInterval(\Drupal::time()->getRequestTime() - $date)]); |
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} |
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|
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/** |
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* Implements hook_preprocess_HOOK() for field--comment.html.twig. |
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*/ |
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function olivera_preprocess_field__comment(&$variables) { |
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// Add a comment_count. |
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$variables['comment_count'] = count(array_filter($variables['comments'], 'is_numeric', ARRAY_FILTER_USE_KEY)); |
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|
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// Add user.compact to field-comment if profile's avatar of current user |
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// exist. |
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$user = \Drupal::currentUser(); |
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if ($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'); |
|
} |
|
|
|
$variables['#cache']['contexts'][] = 'user'; |
|
} |
|
} |
|
|
|
/** |
|
* Implements hook_element_info_alter(). |
|
*/ |
|
function olivera_element_info_alter(&$info) { |
|
if (array_key_exists('text_format', $info)) { |
|
$info['text_format']['#pre_render'][] = [OliveraPreRender::class, 'textFormat']; |
|
} |
|
|
|
if (isset($info['status_messages'])) { |
|
$info['status_messages']['#pre_render'][] = [OliveraPreRender::class, 'messagePlaceholder']; |
|
} |
|
} |
|
|
|
/** |
|
* Implements template_preprocess_text_format_wrapper(). |
|
* |
|
* @todo Remove when https://www.drupal.org/node/3016343 is fixed. |
|
*/ |
|
function olivera_preprocess_text_format_wrapper(&$variables) { |
|
$description_attributes = []; |
|
if (!empty($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 olivera_preprocess_search_result(&$variables) { |
|
// Apply custom date formatter to "date" field. |
|
if (!empty($variables['result']['date'])) { |
|
$variables['info_date'] = \Drupal::service('date.formatter')->format($variables['result']['node']->getCreatedTime(), 'olivera_medium'); |
|
} |
|
} |
|
|
|
/** |
|
* Implements hook_preprocess_links__comment(). |
|
*/ |
|
function olivera_preprocess_links__comment(&$variables) { |
|
foreach ($variables['links'] as &$link) { |
|
$link['link']['#options']['attributes']['class'][] = 'comment__links-link'; |
|
} |
|
} |
|
|
|
/** |
|
* Implements hook_preprocess_table(). |
|
*/ |
|
function olivera_preprocess_table(&$variables) { |
|
// 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'; |
|
$draggable_row_found = TRUE; |
|
} |
|
} |
|
} |
|
} |
|
} |
|
|
|
/** |
|
* Implements hook_form_views_exposed_form_alter(). |
|
*/ |
|
function olivera_form_views_exposed_form_alter(&$form) { |
|
$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 _olivera_hex_to_hsl(string $hex_string) { |
|
// Convert hexcode pairs to rgb values (0-255). |
|
$hex_val = trim($hex_string, '#'); |
|
$r0 = hexdec($hex_val[0] . $hex_val[1]); |
|
$g0 = hexdec($hex_val[2] . $hex_val[3]); |
|
$b0 = hexdec($hex_val[4] . $hex_val[5]); |
|
|
|
// 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]; |
|
}
|
|
|