public function SystemController::themesPage in Drupal 8

Same name and namespace in other branches
9 core/modules/system/src/Controller/SystemController.php \Drupal\system\Controller\SystemController::themesPage()
Returns a theme listing.
@todo Move into ThemeController.
Return value

string An HTML string of the theme listing page.
1 string reference to 'SystemController::themesPage'
system.routing.yml in core/modules/system/system.routing.yml: core/modules/system/system.routing.yml
File

core/modules/system/src/Controller/SystemController.php, line 202
Class

SystemController: Returns responses for System routes.
Namespace

Drupal\system\Controller
Code

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 || $theme->is_default && empty($admin_theme);
    $theme->is_experimental = isset($theme->info['experimental']) && $theme->info['experimental'];

    // 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)) {

      // 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);

      // Confirm that module dependencies are available.
      $theme->incompatible_module = FALSE;

      // Confirm that the user has permission to enable modules.
      $theme->insufficient_module_permissions = FALSE;
    }

    // Check module dependencies.
    if ($theme->module_dependencies) {
      $modules = $this->moduleExtensionList
        ->getList();
      foreach ($theme->module_dependencies as $dependency => $dependency_object) {
        if ($incompatible = $this
          ->checkDependencyMessage($modules, $dependency, $dependency_object)) {
          $theme->module_dependencies_list[$dependency] = $incompatible;
          $theme->incompatible_module = TRUE;
          continue;
        }

        // @todo Add logic for not displaying hidden modules in
        //   https://drupal.org/node/3117829.
        $module_name = $modules[$dependency]->info['name'];
        $theme->module_dependencies_list[$dependency] = $modules[$dependency]->status ? $this
          ->t('@module_name', [
          '@module_name' => $module_name,
        ]) : $this
          ->t('@module_name (<span class="admin-disabled">disabled</span>)', [
          '@module_name' => $module_name,
        ]);

        // Create an additional property that contains only disabled module
        // dependencies. This will determine if it is possible to install the
        // theme, or if modules must first be enabled.
        if (!$modules[$dependency]->status) {
          $theme->module_dependencies_disabled[$dependency] = $module_name;
          if (!$this
            ->currentUser()
            ->hasPermission('administer modules')) {
            $theme->insufficient_module_permissions = TRUE;
          }
        }
      }
    }
    $theme->operations = [];
    if (!empty($theme->status) || !$theme->info['core_incompatible'] && !$theme->incompatible_php && !$theme->incompatible_base && !$theme->incompatible_engine && !$theme->incompatible_module && empty($theme->module_dependencies_disabled)) {

      // 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()] = $theme->info['name'] . ($theme->is_experimental ? ' (' . t('Experimental') . ')' : '');
      }
      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 theme, administration theme and experimental
    // themes.
    $theme->notes = [];
    if ($theme->is_default) {
      $theme->notes[] = $this
        ->t('default theme');
    }
    if ($theme->is_admin) {
      $theme->notes[] = $this
        ->t('administration theme');
    }
    if ($theme->is_experimental) {
      $theme->notes[] = $this
        ->t('experimental 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;
}
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public function SystemController::themesPage in Drupal 8

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