template_preprocess_html(&$variables)
Prepares variables for HTML document templates.
Default template: html.html.twig.
Parameters
array $variables: An associative array containing:
- page: A render element representing the page.
File
- core/includes/theme.inc, line 1254
- The theme system, which controls the output of Drupal.
Code
function template_preprocess_html(&$variables) {
$variables['page'] = $variables['html']['page'];
unset($variables['html']['page']);
$variables['page_top'] = NULL;
if (isset($variables['html']['page_top'])) {
$variables['page_top'] = $variables['html']['page_top'];
unset($variables['html']['page_top']);
}
$variables['page_bottom'] = NULL;
if (isset($variables['html']['page_bottom'])) {
$variables['page_bottom'] = $variables['html']['page_bottom'];
unset($variables['html']['page_bottom']);
}
$variables['html_attributes'] = new Attribute();
// <html> element attributes.
$language_interface = \Drupal::languageManager()->getCurrentLanguage();
$variables['html_attributes']['lang'] = $language_interface->getId();
$variables['html_attributes']['dir'] = $language_interface->getDirection();
if (isset($variables['db_is_active']) && !$variables['db_is_active']) {
$variables['db_offline'] = TRUE;
}
// Add a variable for the root path. This can be used to create a class and
// theme the page depending on the current path (e.g. node, admin, user) as
// well as more specific data like path-frontpage.
$is_front_page = \Drupal::service('path.matcher')->isFrontPage();
if ($is_front_page) {
$variables['root_path'] = FALSE;
}
else {
$system_path = \Drupal::service('path.current')->getPath();
$variables['root_path'] = explode('/', $system_path) [1];
}
$site_config = \Drupal::config('system.site');
// Construct page title.
if (isset($variables['page']['#title']) && is_array($variables['page']['#title'])) {
// Do an early render if the title is a render array.
$variables['page']['#title'] = (string) \Drupal::service('renderer')->render($variables['page']['#title']);
}
if (!empty($variables['page']['#title'])) {
$head_title = array(
// Marking the title as safe since it has had the tags stripped.
'title' => Markup::create(trim(strip_tags($variables['page']['#title']))),
'name' => $site_config->get('name'),
);
}
// @todo Remove once views is not bypassing the view subscriber anymore.
// @see https://www.drupal.org/node/2068471
elseif ($is_front_page) {
$head_title = array(
'title' => t('Home'),
'name' => $site_config->get('name'),
);
}
else {
$head_title = ['name' => $site_config->get('name')];
if ($site_config->get('slogan')) {
$head_title['slogan'] = strip_tags($site_config->get('slogan'));
}
}
$variables['head_title'] = $head_title;
// @deprecated in Drupal 8.0.0, will be removed before Drupal 9.0.0.
$variables['head_title_array'] = $head_title;
// Create placeholder strings for these keys.
// @see \Drupal\Core\Render\HtmlResponseSubscriber
$types = [
'styles' => 'css',
'scripts' => 'js',
'scripts_bottom' => 'js-bottom',
'head' => 'head',
];
$variables['placeholder_token'] = Crypt::randomBytesBase64(55);
foreach ($types as $type => $placeholder_name) {
$placeholder = '<' . $placeholder_name . '-placeholder token="' . $variables['placeholder_token'] . '">';
$variables['#attached']['html_response_attachment_placeholders'][$type] = $placeholder;
}
}
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