function template_preprocess_system_themes_page

Prepares variables for appearance page templates.

Default template: system-themes-page.html.twig.

Parameters

$variables: An associative array containing:

• theme_groups: An associative array containing groups of themes.
• theme_group_titles: An associative array containing titles of themes.

File

core/modules/system/system.admin.inc, line 258

Code

function template_preprocess_system_themes_page(&$variables) {
    $groups = [];
    $theme_groups = $variables['theme_groups'];
    $variables['attributes']['id'] = 'system-themes-page';
    foreach ($variables['theme_group_titles'] as $state => $title) {
        if (!count($theme_groups[$state])) {
            // Skip this group of themes if no theme is there.
            continue;
        }
        // Start new theme group.
        $theme_group = [];
        $theme_group['state'] = $state;
        $theme_group['title'] = $title;
        $theme_group['themes'] = [];
        $theme_group['attributes'] = new Attribute();
        foreach ($theme_groups[$state] as $theme) {
            $current_theme = [];
            // Screenshot depicting the theme.
            if ($theme->screenshot) {
                $current_theme['screenshot'] = [
                    '#theme' => 'image',
                    '#uri' => $theme->screenshot['uri'],
                    '#alt' => $theme->screenshot['alt'],
                    '#title' => $theme->screenshot['title'],
                    '#attributes' => $theme->screenshot['attributes'],
                ];
            }
            else {
                $current_theme['screenshot'] = [
                    '#theme' => 'image',
                    '#uri' => \Drupal::service('extension.list.module')->getPath('system') . '/images/no_screenshot.png',
                    '#alt' => t('No screenshot'),
                    '#title' => t('No screenshot'),
                    '#attributes' => new Attribute([
                        'class' => [
                            'no-screenshot',
                        ],
                    ]),
                ];
            }
            // Localize the theme description.
            $current_theme['description'] = t($theme->info['description']);
            $current_theme['attributes'] = new Attribute();
            $current_theme['name'] = $theme->info['name'];
            $current_theme['version'] = $theme->info['version'] ?? '';
            $current_theme['notes'] = $theme->notes;
            $current_theme['is_default'] = $theme->is_default;
            $current_theme['is_admin'] = $theme->is_admin;
            $current_theme['module_dependencies'] = !empty($theme->module_dependencies_list) ? [
                '#theme' => 'item_list',
                '#items' => $theme->module_dependencies_list,
                '#context' => [
                    'list_style' => 'comma-list',
                ],
            ] : [];
            // Make sure to provide feedback on compatibility.
            $current_theme['incompatible'] = '';
            if (!empty($theme->info['core_incompatible'])) {
                $current_theme['incompatible'] = t("This theme is not compatible with Drupal @core_version. Check that the .info.yml file contains a compatible 'core' or 'core_version_requirement' value.", [
                    '@core_version' => \Drupal::VERSION,
                ]);
            }
            elseif (!empty($theme->incompatible_region)) {
                $current_theme['incompatible'] = t("This theme is missing a 'content' region.");
            }
            elseif (!empty($theme->incompatible_php)) {
                if (substr_count($theme->info['php'], '.') < 2) {
                    $theme->info['php'] .= '.*';
                }
                $current_theme['incompatible'] = t('This theme requires PHP version @php_required and is incompatible with PHP version @php_version.', [
                    '@php_required' => $theme->info['php'],
                    '@php_version' => phpversion(),
                ]);
            }
            elseif (!empty($theme->incompatible_base)) {
                $current_theme['incompatible'] = t('This theme requires the base theme @base_theme to operate correctly.', [
                    '@base_theme' => $theme->info['base theme'],
                ]);
            }
            elseif (!empty($theme->incompatible_engine)) {
                $current_theme['incompatible'] = t('This theme requires the theme engine @theme_engine to operate correctly.', [
                    '@theme_engine' => $theme->info['engine'],
                ]);
            }
            elseif (!empty($theme->incompatible_module)) {
                $current_theme['incompatible'] = t('This theme requires the listed modules to operate correctly.');
            }
            elseif (!empty($theme->module_dependencies_disabled)) {
                if (!empty($theme->insufficient_module_permissions)) {
                    $current_theme['incompatible'] = t('This theme requires the listed modules to operate correctly. They must first be enabled by a user with permissions to do so.');
                }
                else {
                    $modules_url = (string) Url::fromRoute('system.modules_list')->toString();
                    $current_theme['incompatible'] = t('This theme requires the listed modules to operate correctly. They must first be enabled via the <a href=":modules_url">Extend page</a>.', [
                        ':modules_url' => $modules_url,
                    ]);
                }
            }
            // Build operation links.
            $current_theme['operations'] = [
                '#theme' => 'links',
                '#links' => $theme->operations,
                '#attributes' => [
                    'class' => [
                        'operations',
                        'clearfix',
                    ],
                ],
            ];
            $theme_group['themes'][] = $current_theme;
        }
        $groups[] = $theme_group;
    }
    $variables['theme_groups'] = $groups;
}