theme_test.module

<?php


/**
 * @file
 * Test module.
 */
use Drupal\Core\Extension\Extension;

/**
 * Implements hook_theme().
 */
function theme_test_theme($existing, $type, $theme, $path) {
    $items['theme_test'] = [
        'file' => 'theme_test.inc',
        'variables' => [
            'foo' => '',
        ],
    ];
    $items['theme_test_template_test'] = [
        'template' => 'theme_test.template_test',
    ];
    $items['theme_test_template_test_2'] = [
        'template' => 'theme_test.template_test',
    ];
    $items['theme_test_suggestion_provided'] = [
        'variables' => [],
    ];
    $items['theme_test_specific_suggestions'] = [
        'variables' => [],
    ];
    $items['theme_test_suggestions'] = [
        'variables' => [],
    ];
    $items['theme_test_general_suggestions'] = [
        'variables' => [],
    ];
    $items['theme_test_foo'] = [
        'variables' => [
            'foo' => NULL,
        ],
    ];
    $items['theme_test_render_element'] = [
        'render element' => 'elements',
    ];
    $items['theme_test_render_element_children'] = [
        'render element' => 'element',
    ];
    $items['theme_test_preprocess_suggestions'] = [
        'variables' => [
            'foo' => '',
            'bar' => '',
        ],
    ];
    $items['theme_test_registered_by_module'] = [
        'render element' => 'content',
        'base hook' => 'container',
    ];
    $items['theme_test_theme_class'] = [
        'variables' => [
            'message' => '',
        ],
    ];
    return $items;
}

/**
 * Implements hook_preprocess_HOOK() for HTML document templates.
 */
function theme_test_preprocess_html(&$variables) {
    $variables['html_attributes']['theme_test_html_attribute'] = 'theme test html attribute value';
    $variables['attributes']['theme_test_body_attribute'] = 'theme test body attribute value';
    $variables['attributes']['theme_test_page_variable'] = 'Page variable is an array.';
}

/**
 * Implements hook_page_bottom().
 */
function theme_test_page_bottom(array &$page_bottom) {
    $page_bottom['theme_test_page_bottom'] = [
        '#markup' => 'theme test page bottom markup',
    ];
}

/**
 * Implements hook_theme_suggestions_HOOK().
 */
function theme_test_theme_suggestions_theme_test_preprocess_suggestions($variables) {
    return [
        'theme_test_preprocess_suggestions__' . $variables['foo'],
    ];
}

/**
 * Implements hook_preprocess_HOOK().
 */
function theme_test_preprocess_theme_test_preprocess_suggestions(&$variables) {
    $variables['foo'] = 'Theme hook implementor=theme_theme_test_preprocess_suggestions().';
}

/**
 * Tests a module overriding a default hook with a suggestion.
 */
function theme_test_preprocess_theme_test_preprocess_suggestions__monkey(&$variables) {
    $variables['foo'] = 'Monkey';
}

/**
 * Prepares variables for test render element templates.
 *
 * Default template: theme-test-render-element.html.twig.
 *
 * @param array $variables
 *   An associative array containing:
 *   - elements: An associative array containing the properties of the element.
 */
function template_preprocess_theme_test_render_element(&$variables) {
    $variables['attributes']['data-variables-are-preprocessed'] = TRUE;
}

/**
 * Implements hook_theme_suggestions_HOOK().
 */
function theme_test_theme_suggestions_theme_test_suggestion_provided(array $variables) {
    return [
        'theme_test_suggestion_provided__foo',
    ];
}

/**
 * Implements hook_theme_suggestions_alter().
 */
function theme_test_theme_suggestions_alter(array &$suggestions, array $variables, $hook) {
    \Drupal::messenger()->addStatus(__FUNCTION__ . '() executed for ' . $hook . '.');
}

/**
 * Implements hook_theme_suggestions_HOOK_alter().
 */
function theme_test_theme_suggestions_theme_test_suggestions_alter(array &$suggestions, array $variables) {
    \Drupal::messenger()->addStatus(__FUNCTION__ . '() executed.');
}

/**
 * Implements hook_system_info_alter().
 *
 * @see \Drupal\system\Tests\Theme\ThemeInfoTest::testChanges()
 */
function theme_test_system_info_alter(array &$info, Extension $file, $type) {
    if ($type == 'theme' && $file->getName() == 'test_theme' && \Drupal::state()->get('theme_test.modify_info_files')) {
        // Add a library to see if the system picks it up.
        $info += [
            'libraries' => [],
        ];
        $info['libraries'][] = 'core/backbone';
    }
}

/**
 * Implements hook_theme_suggestions_HOOK().
 */
function theme_test_theme_suggestions_node(array $variables) {
    $xss = '<script type="text/javascript">alert(\'yo\');</script>';
    $suggestions[] = 'node__' . $xss;
    return $suggestions;
}

/**
 * Implements template_preprocess_HOOK() for theme_test_registered_by_module.
 */
function template_preprocess_theme_test_registered_by_module() {
}