function ThemeInitialization::loadActiveTheme

File

core/lib/Drupal/Core/Theme/ThemeInitialization.php, line 129

Class

ThemeInitialization

Provides the theme initialization logic.

Namespace

Code

public function loadActiveTheme(ActiveTheme $active_theme) {
  // Initialize the theme.
  if ($theme_engine = $active_theme->getEngine()) {
    // Include the engine.
    include_once $this->root . '/' . $active_theme->getOwner();
    if (function_exists($theme_engine . '_init')) {
      @trigger_error('THEME_ENGINE_init() is deprecated in drupal:9.3.0 and removed in drupal:10.0.0. There is no replacement. See https://www.drupal.org/node/3246978', E_USER_DEPRECATED);
      foreach ($active_theme->getBaseThemeExtensions() as $base) {
        call_user_func($theme_engine . '_init', $base);
      }
      call_user_func($theme_engine . '_init', $active_theme->getExtension());
    }
    else {
      foreach ($active_theme->getBaseThemeExtensions() as $base) {
        $base->load();
      }
      $active_theme->getExtension()
        ->load();
    }
  }
  else {
    // include non-engine theme files
    foreach ($active_theme->getBaseThemeExtensions() as $base) {
      // Include the theme file or the engine.
      if ($base->owner) {
        include_once $this->root . '/' . $base->owner;
      }
    }
    // and our theme gets one too.
    if ($active_theme->getOwner()) {
      include_once $this->root . '/' . $active_theme->getOwner();
    }
  }
  // Always include Twig as the default theme engine.
  include_once $this->root . '/core/themes/engines/twig/twig.engine';
}