/**
* {@inheritdoc}
*/
public function mail($module, $key, $to, $langcode, $params = array(), $reply = NULL, $send = TRUE)
{
// Switch the theme to the configured mail theme.
$mail_theme = $this->getMailTheme();
$current_active_theme = $this->themeManager->getActiveTheme();
if ($mail_theme != $current_active_theme->getName()) {
$this->themeManager->setActiveTheme($this->themeInitialization->initTheme($mail_theme));
// The theme registry returns the same registry object no matter which
// theme is currently active. This works around that by having a duplicate
// service, that is only called when the mail theme is acive.
// @todo: This will not work if this can not be called. Remove this once
// https://www.drupal.org/node/2640962 is committed.
if ($this->themeManager instanceof ThemeManager) {
$this->themeManager->setThemeRegistry($this->mailThemeRegistry);
}
}
try {
$message = parent::mail($module, $key, $to, $langcode, $params, $reply, $send);
} finally {
// Revert the active theme, this is done inside a finally block so it is
// executed even if an exception is thrown during sending a mail.
if ($mail_theme != $current_active_theme->getName()) {
$this->themeManager->setActiveTheme($current_active_theme);
if ($this->themeManager instanceof ThemeManager) {
$this->themeManager->setThemeRegistry($this->defaultThemeRegistry);
}
}
}
return $message;
}
/**
* Initializes the active theme for a given route match.
*
* @param \Drupal\Core\Routing\RouteMatchInterface $route_match
* The current route match.
*/
protected function initTheme(RouteMatchInterface $route_match = NULL)
{
// Determine the active theme for the theme negotiator service. This includes
// the default theme as well as really specific ones like the ajax base theme.
if (!$route_match) {
$route_match = \Drupal::routeMatch();
}
if ($route_match instanceof StackedRouteMatchInterface) {
$route_match = $route_match->getMasterRouteMatch();
}
$theme = $this->themeNegotiator->determineActiveTheme($route_match);
$this->activeTheme = $this->themeInitialization->initTheme($theme);
}