scroll_progress-9.1.x-dev/scroll_progress.module

<?php

/**
 * @file
 * This file is used to write hooks that used in the module.
 */

use Drupal\Core\Cache\Cache;

/**
 * Implements template_preprocess_html().
 */
function scroll_progress_preprocess_html(&$variables) {
  /** @var \Drupal\scroll_progress\ScrollProgressHelperInterface $helper */
  $helper = \Drupal::service('scroll_progress.helper');
  $config = $helper->getConfiguration();
  if (!isset($variables['#cache']['tags'])) {
    $variables['#cache']['tags'] = [];
  }
  $variables['#cache']['tags'] = Cache::mergeTags($variables['#cache']['tags'], $config->getCacheTags());
  if (!$helper->isEnabled()) {
    return;
  }
  if ($helper->evaluate()) {
    $selected_theme = $config->get('scroll_progress_theme');
    $color = $config->get('scroll_progress_color');
    $element = $config->get('element') ?: 'body';
    $admin_context = \Drupal::service('router.admin_context');
    if ($admin_context->isAdminRoute()) {
      $admin_flag = $config->get('scroll_progress_load_on_admin_enabled');
      if ($admin_flag == 1) {
        $variables['#attached']['library'][] = 'scroll_progress/scroll_progress_' . $selected_theme . '_js';
        $variables['#attached']['drupalSettings']['scroll_progress_color'] = $color;
        $variables['#attached']['drupalSettings']['scroll_progress_element'] = $element;
      }
    }
    else {
      $variables['#attached']['library'][] = 'scroll_progress/scroll_progress_' . $selected_theme . '_js';
      $variables['#attached']['drupalSettings']['scroll_progress_color'] = $color;
      $variables['#attached']['drupalSettings']['scroll_progress_element'] = $element;
    }
  }
}

/**
 * Implements hook_help().
 */
function scroll_progress_help($path, $arg) {
  switch ($path) {
    case 'help.page.scroll_progress':
      $output = '<p>' . t('It provides a beautiful progress indicator for page scroll') . '</p>';
      $output .= '<p>' . t('Current version of the module allows you to choose any of the 5 available Scroll themes.You can choose color scheme for indication.') . '</p>';
      $output .= '<ul>' . t('Themes are as follow:');
      $output .= '<li>' . t('Straight line') . '</li>';
      $output .= '<li>' . t('Circular progress') . '</li>';
      $output .= '<li>' . t('Animated progress') . '</li>';
      $output .= '<li>' . t('Tooltip progress') . '</li>';
      $output .= '<li>' . t('Bottom progress bar') . '</li>';
      $output .= '</ul>';
      return $output;
  }
}