--- /dev/null
+<?php
+
+namespace Drupal\system\Controller;
+
+use Drupal\Core\Cache\CacheableMetadata;
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\Extension\ThemeHandlerInterface;
+use Drupal\Core\Form\FormBuilderInterface;
+use Drupal\Core\Menu\MenuLinkTreeInterface;
+use Drupal\Core\Menu\MenuTreeParameters;
+use Drupal\Core\Theme\ThemeAccessCheck;
+use Drupal\Core\Url;
+use Drupal\system\SystemManager;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Returns responses for System routes.
+ */
+class SystemController extends ControllerBase {
+
+ /**
+ * System Manager Service.
+ *
+ * @var \Drupal\system\SystemManager
+ */
+ protected $systemManager;
+
+ /**
+ * The theme access checker service.
+ *
+ * @var \Drupal\Core\Theme\ThemeAccessCheck
+ */
+ protected $themeAccess;
+
+ /**
+ * The form builder service.
+ *
+ * @var \Drupal\Core\Form\FormBuilderInterface
+ */
+ protected $formBuilder;
+
+ /**
+ * The theme handler service.
+ *
+ * @var \Drupal\Core\Extension\ThemeHandlerInterface
+ */
+ protected $themeHandler;
+
+ /**
+ * The menu link tree service.
+ *
+ * @var \Drupal\Core\Menu\MenuLinkTreeInterface
+ */
+ protected $menuLinkTree;
+
+ /**
+ * Constructs a new SystemController.
+ *
+ * @param \Drupal\system\SystemManager $systemManager
+ * System manager service.
+ * @param \Drupal\Core\Theme\ThemeAccessCheck $theme_access
+ * The theme access checker service.
+ * @param \Drupal\Core\Form\FormBuilderInterface $form_builder
+ * The form builder.
+ * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
+ * The theme handler.
+ * @param \Drupal\Core\Menu\MenuLinkTreeInterface $menu_link_tree
+ * The menu link tree service.
+ */
+ public function __construct(SystemManager $systemManager, ThemeAccessCheck $theme_access, FormBuilderInterface $form_builder, ThemeHandlerInterface $theme_handler, MenuLinkTreeInterface $menu_link_tree) {
+ $this->systemManager = $systemManager;
+ $this->themeAccess = $theme_access;
+ $this->formBuilder = $form_builder;
+ $this->themeHandler = $theme_handler;
+ $this->menuLinkTree = $menu_link_tree;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static(
+ $container->get('system.manager'),
+ $container->get('access_check.theme'),
+ $container->get('form_builder'),
+ $container->get('theme_handler'),
+ $container->get('menu.link_tree')
+ );
+ }
+
+ /**
+ * Provide the administration overview page.
+ *
+ * @param string $link_id
+ * The ID of the administrative path link for which to display child links.
+ *
+ * @return array
+ * A renderable array of the administration overview page.
+ */
+ public function overview($link_id) {
+ // Check for status report errors.
+ if ($this->systemManager->checkRequirements() && $this->currentUser()->hasPermission('administer site configuration')) {
+ drupal_set_message($this->t('One or more problems were detected with your Drupal installation. Check the <a href=":status">status report</a> for more information.', [':status' => $this->url('system.status')]), 'error');
+ }
+ // Load all menu links below it.
+ $parameters = new MenuTreeParameters();
+ $parameters->setRoot($link_id)->excludeRoot()->setTopLevelOnly()->onlyEnabledLinks();
+ $tree = $this->menuLinkTree->load(NULL, $parameters);
+ $manipulators = [
+ ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+ ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+ ];
+ $tree = $this->menuLinkTree->transform($tree, $manipulators);
+ $tree_access_cacheability = new CacheableMetadata();
+ $blocks = [];
+ foreach ($tree as $key => $element) {
+ $tree_access_cacheability = $tree_access_cacheability->merge(CacheableMetadata::createFromObject($element->access));
+
+ // Only render accessible links.
+ if (!$element->access->isAllowed()) {
+ continue;
+ }
+
+ $link = $element->link;
+ $block['title'] = $link->getTitle();
+ $block['description'] = $link->getDescription();
+ $block['content'] = [
+ '#theme' => 'admin_block_content',
+ '#content' => $this->systemManager->getAdminBlock($link),
+ ];
+
+ if (!empty($block['content']['#content'])) {
+ $blocks[$key] = $block;
+ }
+ }
+
+ if ($blocks) {
+ ksort($blocks);
+ $build = [
+ '#theme' => 'admin_page',
+ '#blocks' => $blocks,
+ ];
+ $tree_access_cacheability->applyTo($build);
+ return $build;
+ }
+ else {
+ $build = [
+ '#markup' => $this->t('You do not have any administrative items.'),
+ ];
+ $tree_access_cacheability->applyTo($build);
+ return $build;
+ }
+ }
+
+ /**
+ * Sets whether the admin menu is in compact mode or not.
+ *
+ * @param string $mode
+ * Valid values are 'on' and 'off'.
+ *
+ * @return \Symfony\Component\HttpFoundation\RedirectResponse
+ */
+ public function compactPage($mode) {
+ user_cookie_save(['admin_compact_mode' => ($mode == 'on')]);
+ return $this->redirect('<front>');
+ }
+
+ /**
+ * Provides a single block from the administration menu as a page.
+ */
+ public function systemAdminMenuBlockPage() {
+ return $this->systemManager->getBlockContents();
+ }
+
+ /**
+ * Returns a theme listing.
+ *
+ * @return string
+ * An HTML string of the theme listing page.
+ *
+ * @todo Move into ThemeController.
+ */
+ public function themesPage() {
+ $config = $this->config('system.theme');
+ // Get all available themes.
+ $themes = $this->themeHandler->rebuildThemeData();
+ uasort($themes, 'system_sort_modules_by_info_name');
+
+ $theme_default = $config->get('default');
+ $theme_groups = ['installed' => [], 'uninstalled' => []];
+ $admin_theme = $config->get('admin');
+ $admin_theme_options = [];
+
+ foreach ($themes as &$theme) {
+ if (!empty($theme->info['hidden'])) {
+ continue;
+ }
+ $theme->is_default = ($theme->getName() == $theme_default);
+ $theme->is_admin = ($theme->getName() == $admin_theme || ($theme->is_default && $admin_theme == '0'));
+
+ // Identify theme screenshot.
+ $theme->screenshot = NULL;
+ // Create a list which includes the current theme and all its base themes.
+ if (isset($themes[$theme->getName()]->base_themes)) {
+ $theme_keys = array_keys($themes[$theme->getName()]->base_themes);
+ $theme_keys[] = $theme->getName();
+ }
+ else {
+ $theme_keys = [$theme->getName()];
+ }
+ // Look for a screenshot in the current theme or in its closest ancestor.
+ foreach (array_reverse($theme_keys) as $theme_key) {
+ if (isset($themes[$theme_key]) && file_exists($themes[$theme_key]->info['screenshot'])) {
+ $theme->screenshot = [
+ 'uri' => $themes[$theme_key]->info['screenshot'],
+ 'alt' => $this->t('Screenshot for @theme theme', ['@theme' => $theme->info['name']]),
+ 'title' => $this->t('Screenshot for @theme theme', ['@theme' => $theme->info['name']]),
+ 'attributes' => ['class' => ['screenshot']],
+ ];
+ break;
+ }
+ }
+
+ if (empty($theme->status)) {
+ // Ensure this theme is compatible with this version of core.
+ $theme->incompatible_core = !isset($theme->info['core']) || ($theme->info['core'] != \DRUPAL::CORE_COMPATIBILITY);
+ // Require the 'content' region to make sure the main page
+ // content has a common place in all themes.
+ $theme->incompatible_region = !isset($theme->info['regions']['content']);
+ $theme->incompatible_php = version_compare(phpversion(), $theme->info['php']) < 0;
+ // Confirm that all base themes are available.
+ $theme->incompatible_base = (isset($theme->info['base theme']) && !($theme->base_themes === array_filter($theme->base_themes)));
+ // Confirm that the theme engine is available.
+ $theme->incompatible_engine = isset($theme->info['engine']) && !isset($theme->owner);
+ }
+ $theme->operations = [];
+ if (!empty($theme->status) || !$theme->incompatible_core && !$theme->incompatible_php && !$theme->incompatible_base && !$theme->incompatible_engine) {
+ // Create the operations links.
+ $query['theme'] = $theme->getName();
+ if ($this->themeAccess->checkAccess($theme->getName())) {
+ $theme->operations[] = [
+ 'title' => $this->t('Settings'),
+ 'url' => Url::fromRoute('system.theme_settings_theme', ['theme' => $theme->getName()]),
+ 'attributes' => ['title' => $this->t('Settings for @theme theme', ['@theme' => $theme->info['name']])],
+ ];
+ }
+ if (!empty($theme->status)) {
+ if (!$theme->is_default) {
+ $theme_uninstallable = TRUE;
+ if ($theme->getName() == $admin_theme) {
+ $theme_uninstallable = FALSE;
+ }
+ // Check it isn't the base of theme of an installed theme.
+ foreach ($theme->required_by as $themename => $dependency) {
+ if (!empty($themes[$themename]->status)) {
+ $theme_uninstallable = FALSE;
+ }
+ }
+ if ($theme_uninstallable) {
+ $theme->operations[] = [
+ 'title' => $this->t('Uninstall'),
+ 'url' => Url::fromRoute('system.theme_uninstall'),
+ 'query' => $query,
+ 'attributes' => ['title' => $this->t('Uninstall @theme theme', ['@theme' => $theme->info['name']])],
+ ];
+ }
+ $theme->operations[] = [
+ 'title' => $this->t('Set as default'),
+ 'url' => Url::fromRoute('system.theme_set_default'),
+ 'query' => $query,
+ 'attributes' => ['title' => $this->t('Set @theme as default theme', ['@theme' => $theme->info['name']])],
+ ];
+ }
+ $admin_theme_options[$theme->getName()] = $theme->info['name'];
+ }
+ else {
+ $theme->operations[] = [
+ 'title' => $this->t('Install'),
+ 'url' => Url::fromRoute('system.theme_install'),
+ 'query' => $query,
+ 'attributes' => ['title' => $this->t('Install @theme theme', ['@theme' => $theme->info['name']])],
+ ];
+ $theme->operations[] = [
+ 'title' => $this->t('Install and set as default'),
+ 'url' => Url::fromRoute('system.theme_set_default'),
+ 'query' => $query,
+ 'attributes' => ['title' => $this->t('Install @theme as default theme', ['@theme' => $theme->info['name']])],
+ ];
+ }
+ }
+
+ // Add notes to default and administration theme.
+ $theme->notes = [];
+ if ($theme->is_default) {
+ $theme->notes[] = $this->t('default theme');
+ }
+ if ($theme->is_admin) {
+ $theme->notes[] = $this->t('administration theme');
+ }
+
+ // Sort installed and uninstalled themes into their own groups.
+ $theme_groups[$theme->status ? 'installed' : 'uninstalled'][] = $theme;
+ }
+
+ // There are two possible theme groups.
+ $theme_group_titles = [
+ 'installed' => $this->formatPlural(count($theme_groups['installed']), 'Installed theme', 'Installed themes'),
+ ];
+ if (!empty($theme_groups['uninstalled'])) {
+ $theme_group_titles['uninstalled'] = $this->formatPlural(count($theme_groups['uninstalled']), 'Uninstalled theme', 'Uninstalled themes');
+ }
+
+ uasort($theme_groups['installed'], 'system_sort_themes');
+ $this->moduleHandler()->alter('system_themes_page', $theme_groups);
+
+ $build = [];
+ $build[] = [
+ '#theme' => 'system_themes_page',
+ '#theme_groups' => $theme_groups,
+ '#theme_group_titles' => $theme_group_titles,
+ ];
+ $build[] = $this->formBuilder->getForm('Drupal\system\Form\ThemeAdminForm', $admin_theme_options);
+
+ return $build;
+ }
+
+}