easyopac_second_menu.module

<?php

/**
 * @file
 * Add second tier menu right below the main menu.
 */

/**
 * Implements hook_ctools_plugin_pre_alter().
 */
function easyopac_second_menu_ctools_plugin_pre_alter(&$plugin, &$info) {
  if ($plugin['module'] == 'ding_frontend' && $plugin['name'] == 'ding2_site_template') {
    $plugin['regions']['second_menu_tier'] = 'Second Menu Tier';
    $plugin['path'] = drupal_get_path('module', 'easyopac_second_menu') . '/plugins/layouts/site_template';
    $plugin['theme'] = 'ding2_site_template';
  }
}

/**
 * Implements hook_theme_registry_alter().
 */
function easyopac_second_menu_theme_registry_alter(&$theme_registry) {
  $module_path = drupal_get_path('module', 'easyopac_second_menu');
  // Find all .tpl.php files in this module's folder recursively.
  $template_file_objects = drupal_find_theme_templates($theme_registry, '.tpl.php', $module_path);
  // Iterate through all found template file objects.
  foreach ($template_file_objects as $key => $template_file_object) {
    // If the template has not already been overridden by a theme.
    // Alter the theme path and template elements.
    $theme_registry[$key]['theme path'] = $module_path;
    $theme_registry[$key] = array_merge($theme_registry[$key], $template_file_object);
    $theme_registry[$key]['type'] = 'module';
  }
}

/**
 * Implements hook_block_view_alter().
 */
function easyopac_second_menu_block_view_alter(&$data, $block) {
  if ($block->delta === 'second_tier_menu') {
    if (!empty($data['content'])) {
      $data['content']['#attached']['css'][] = drupal_get_path('module', 'easyopac_second_menu') . '/css/easyopac_second_menu.css';
    }
  }
}

/**
 * Implements hook_form_system_theme_settings_alter().
 */
function easyopac_second_menu_form_system_theme_settings_alter(&$form, &$form_state) {
  if (isset($form_state['build_info']['args'][0]) && ($theme = $form_state['build_info']['args'][0]) && color_get_info($theme) && function_exists('gd_info')) {
    $theme_colors = color_get_palette($theme);

    $form['color']['palette']['second_menu_background'] = [
      '#type' => 'textfield',
      '#title' => t('Second Menu Background'),
      '#value_callback' => 'color_paletter_color_value',
      '#description' => t('Is used e.g. as background-color for the secondary menu.'),
      '#default_value' => isset($theme_colors['second_menu_background']) ? $theme_colors['second_menu_background'] : $theme_colors['primary'],
      '#size' => 8,
    ];
  }
}

/**
 * Implements hook_preprocess().
 */
function easyopac_second_menu_preprocess(&$variables, $hook) {
  if ($hook == 'panels_pane' && $variables['pane']->panel === 'second_menu_tier') {
    $theme = variable_get('theme_default', 'ddbasic');
    $theme_colors = color_get_palette($theme);
    // @todo: Move color to data attributes and process from css directly.
    $variables['attributes_array']['style'] = ['background-color: ' . $theme_colors['second_menu_background']];
  }
}