function theme_get_setting

Retrieves a setting for the current theme or for a given theme.

The final setting is obtained from the last value found in the following sources:

• the saved values from the global theme settings form
• the saved values from the theme's settings form

To only retrieve the default global theme setting, an empty string should be given for $theme.

Parameters

$setting_name: The name of the setting to be retrieved.

$theme: The name of a given theme; defaults to the current theme.

Return value

mixed The value of the requested setting, NULL if the setting does not exist.

File

core/includes/theme.inc, line 264

The theme system, which controls the output of Drupal.

Code

function theme_get_setting($setting_name, $theme = NULL) {

  /** @var \Drupal\Core\Theme\ThemeSettings[] $cache */
  $cache =& drupal_static(__FUNCTION__, []);

  // If no key is given, use the current theme if we can determine it.
  if (!isset($theme)) {
    $theme = \Drupal::theme()
      ->getActiveTheme()
      ->getName();
  }
  if (empty($cache[$theme])) {

    // Create a theme settings object.
    $cache[$theme] = new ThemeSettings($theme);

    // Get the global settings from configuration.
    $cache[$theme]
      ->setData(\Drupal::config('system.theme.global')
      ->get());

    // Get the values for the theme-specific settings from the .info.yml files
    // of the theme and all its base themes.
    $themes = \Drupal::service('theme_handler')
      ->listInfo();
    if (isset($themes[$theme])) {
      $theme_object = $themes[$theme];

      // Retrieve configured theme-specific settings, if any.
      try {
        if ($theme_settings = \Drupal::config($theme . '.settings')
          ->get()) {
          $cache[$theme]
            ->merge($theme_settings);
        }
      } catch (StorageException $e) {
      }

      // If the theme does not support a particular feature, override the global
      // setting and set the value to NULL.
      if (!empty($theme_object->info['features'])) {
        foreach (_system_default_theme_features() as $feature) {
          if (!in_array($feature, $theme_object->info['features'])) {
            $cache[$theme]
              ->set('features.' . $feature, NULL);
          }
        }
      }

      /** @var \Drupal\Core\File\FileUrlGeneratorInterface $file_url_generator */
      $file_url_generator = \Drupal::service('file_url_generator');

      // Generate the path to the logo image.
      if ($cache[$theme]
        ->get('logo.use_default')) {
        $logo = \Drupal::service('theme.initialization')
          ->getActiveThemeByName($theme)
          ->getLogo();
        $cache[$theme]
          ->set('logo.url', $file_url_generator
          ->generateString($logo));
      }
      elseif ($logo_path = $cache[$theme]
        ->get('logo.path')) {
        $cache[$theme]
          ->set('logo.url', $file_url_generator
          ->generateString($logo_path));
      }

      // Generate the path to the favicon.
      if ($cache[$theme]
        ->get('features.favicon')) {
        $favicon_path = $cache[$theme]
          ->get('favicon.path');
        if ($cache[$theme]
          ->get('favicon.use_default')) {
          if (file_exists($favicon = $theme_object
            ->getPath() . '/favicon.ico')) {
            $cache[$theme]
              ->set('favicon.url', $file_url_generator
              ->generateString($favicon));
          }
          else {
            $cache[$theme]
              ->set('favicon.url', $file_url_generator
              ->generateString('core/misc/favicon.ico'));
          }
        }
        elseif ($favicon_path) {
          $cache[$theme]
            ->set('favicon.url', $file_url_generator
            ->generateString($favicon_path));
        }
        else {
          $cache[$theme]
            ->set('features.favicon', FALSE);
        }
      }
    }
  }
  return $cache[$theme]
    ->get($setting_name);
}