Same name in other branches

1. 8.9.x core/modules/system/src/Controller/ThemeController.php \Drupal\system\Controller\ThemeController::setDefaultTheme()
2. 10 core/modules/system/src/Controller/ThemeController.php \Drupal\system\Controller\ThemeController::setDefaultTheme()
3. 11.x core/modules/system/src/Controller/ThemeController.php \Drupal\system\Controller\ThemeController::setDefaultTheme()

Set the default theme.

Parameters

\Symfony\Component\HttpFoundation\Request $request: A request object containing a theme name.

Return value

\Symfony\Component\HttpFoundation\RedirectResponse|array Redirects back to the appearance admin page or the confirmation form if an experimental theme will be installed.

Throws

\Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException Throws access denied when no theme is set in the request.

1 string reference to 'ThemeController::setDefaultTheme'

system.routing.yml in core/modules/system/system.routing.yml

core/modules/system/system.routing.yml

File

core/modules/system/src/Controller/ThemeController.php, line 211

Class

ThemeController

Controller for theme handling.

Namespace

Drupal\system\Controller

Code

public function setDefaultTheme(Request $request) {
    $config = $this->configFactory
        ->getEditable('system.theme');
    $theme = $request->query
        ->get('theme');
    if (isset($theme)) {
        // Get current list of themes.
        $themes = $this->themeHandler
            ->listInfo();
        // Display confirmation form if an experimental theme is being installed.
        if ($this->willInstallExperimentalTheme($theme)) {
            return $this->formBuilder()
                ->getForm(ThemeExperimentalConfirmForm::class, $theme, TRUE);
        }
        // Check if the specified theme is one recognized by the system.
        // Or try to install the theme.
        if (isset($themes[$theme]) || $this->themeInstaller
            ->install([
            $theme,
        ])) {
            $themes = $this->themeHandler
                ->listInfo();
            // Set the default theme.
            $config->set('default', $theme)
                ->save();
            // The status message depends on whether an admin theme is currently in
            // use: a value of 0 means the admin theme is set to be the default
            // theme.
            $admin_theme = $config->get('admin');
            if (!empty($admin_theme) && $admin_theme != $theme) {
                $this->messenger()
                    ->addStatus($this->t('Please note that the administration theme is still set to the %admin_theme theme; consequently, the theme on this page remains unchanged. All non-administrative sections of the site, however, will show the selected %selected_theme theme by default.', [
                    '%admin_theme' => $themes[$admin_theme]->info['name'],
                    '%selected_theme' => $themes[$theme]->info['name'],
                ]));
            }
            else {
                $this->messenger()
                    ->addStatus($this->t('%theme is now the default theme.', [
                    '%theme' => $themes[$theme]->info['name'],
                ]));
            }
        }
        else {
            $this->messenger()
                ->addError($this->t('The %theme theme was not found.', [
                '%theme' => $theme,
            ]));
        }
        return $this->redirect('system.themes_page');
    }
    throw new AccessDeniedHttpException();
}

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