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<?php
namespace Drupal\Core\Render;
use Drupal\Component\Utility\UrlHelper;
/**
* Default bare HTML page renderer.
*/
class BareHtmlPageRenderer implements BareHtmlPageRendererInterface {
/**
* The renderer service.
*
* @var \Drupal\Core\Render\Renderer
*/
protected $renderer;
/**
* The HTML response attachments processor service.
*
* @var \Drupal\Core\Render\AttachmentsResponseProcessorInterface
*/
protected $htmlResponseAttachmentsProcessor;
/**
* Constructs a new BareHtmlPageRenderer.
*
* @param \Drupal\Core\Render\RendererInterface $renderer
* The renderer service.
* @param \Drupal\Core\Render\AttachmentsResponseProcessorInterface $html_response_attachments_processor
* The HTML response attachments processor service.
*/
public function __construct(RendererInterface $renderer, AttachmentsResponseProcessorInterface $html_response_attachments_processor) {
$this->renderer = $renderer;
$this->htmlResponseAttachmentsProcessor = $html_response_attachments_processor;
}
/**
* {@inheritdoc}
*/
public function renderBarePage(array $content, $title, $page_theme_property, array $page_additions = []) {
$attributes = [
'class' => [
str_replace('_', '-', $page_theme_property),
],
];
$html = [
'#type' => 'html',
'#attributes' => $attributes,
'page' => [
'#type' => 'page',
'#theme' => $page_theme_property,
'#title' => $title,
'content' => $content,
] + $page_additions,
];
// For backwards compatibility.
// @todo In Drupal 9, add a $show_messages function parameter.
if (!isset($page_additions['#show_messages']) || $page_additions['#show_messages'] === TRUE) {
$html['page']['highlighted'] = ['#type' => 'status_messages'];
}
// Add the bare minimum of attachments from the system module and the
// current maintenance theme.
$this->systemPageAttachments($html['page']);
$this->renderer->renderRoot($html);
$response = new HtmlResponse();
$response->setContent($html);
// Process attachments, because this does not go via the regular render
// pipeline, but will be sent directly.
$response = $this->htmlResponseAttachmentsProcessor->processAttachments($response);
return $response;
}
/**
* Helper for system_page_attachments.
*
* SystemPageAttachment needs to be on BareHtmlPageRenderer.
* When BareHtmlPageRenderer is called, the system module is not available.
* PageAttachmentsHook can inject BareHtmlPageRenderer to use for
* system_page_attachments.
*
* @param array $page
* The page to attach to.
*/
public function systemPageAttachments(array &$page): void {
// Ensure the same CSS is loaded in template_preprocess_maintenance_page().
$page['#attached']['library'][] = 'system/base';
if (\Drupal::service('router.admin_context')->isAdminRoute()) {
$page['#attached']['library'][] = 'system/admin';
}
// Attach libraries used by this theme.
$active_theme = \Drupal::theme()->getActiveTheme();
foreach ($active_theme->getLibraries() as $library) {
$page['#attached']['library'][] = $library;
}
// Attach favicon.
if (theme_get_setting('features.favicon')) {
$favicon = theme_get_setting('favicon.url');
$type = theme_get_setting('favicon.mimetype');
$page['#attached']['html_head_link'][][] = [
'rel' => 'icon',
'href' => UrlHelper::stripDangerousProtocols($favicon),
'type' => $type,
];
}
// Get the major Drupal version.
[$version] = explode('.', \Drupal::VERSION);
// Attach default meta tags.
$meta_default = [
// Make sure the Content-Type comes first because the IE browser may be
// vulnerable to XSS via encoding attacks from any content that comes
// before this META tag, such as a TITLE tag.
'system_meta_content_type' => [
'#tag' => 'meta',
'#attributes' => [
'charset' => 'utf-8',
],
// Security: This always has to be output first.
'#weight' => -1000,
],
// Show Drupal and the major version number in the META GENERATOR tag.
'system_meta_generator' => [
'#type' => 'html_tag',
'#tag' => 'meta',
'#attributes' => [
'name' => 'Generator',
'content' => 'Drupal ' . $version . ' (https://www.drupal.org)',
],
],
// Attach default mobile meta tags for responsive design.
'MobileOptimized' => [
'#tag' => 'meta',
'#attributes' => [
'name' => 'MobileOptimized',
'content' => 'width',
],
],
'HandheldFriendly' => [
'#tag' => 'meta',
'#attributes' => [
'name' => 'HandheldFriendly',
'content' => 'true',
],
],
'viewport' => [
'#tag' => 'meta',
'#attributes' => [
'name' => 'viewport',
'content' => 'width=device-width, initial-scale=1.0',
],
],
];
foreach ($meta_default as $key => $value) {
$page['#attached']['html_head'][] = [$value, $key];
}
// Handle setting the "active" class on links by:
// - loading the active-link library if the current user is authenticated;
// - applying a response filter if the current user is anonymous.
// @see \Drupal\Core\Link
// @see \Drupal\Core\Utility\LinkGenerator::generate()
// @see \Drupal\Core\Theme\ThemePreprocess::preprocessLinks()
// @see \Drupal\Core\EventSubscriber\ActiveLinkResponseFilter
$page['#cache']['contexts'][] = 'user.roles:authenticated';
if (\Drupal::currentUser()->isAuthenticated()) {
$page['#attached']['library'][] = 'core/drupal.active-link';
}
}
}
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