fixtrail.php

<?php

/**
 * Implements hook_page_delivery_callback_alter().
 */
function fixtrail_page_delivery_callback_alter(&$callback) {
  $current_path = current_path();
  // Only work on normal pages, not ajax nor admin pages.
  if ($callback != 'drupal_deliver_html_page' || path_is_admin($current_path)) {
    return;
  }
  $parent_path = NULL;

  // Set the nearest parent given certain conditions.
  $item = menu_get_item();
  if ($item['path'] == 'node/%') {
    $node = $item['map'][1];

    if ($node->type == 'evenement') {
      $parent_path = 'evenements';
    }
    elseif ($node->type == 'dossier') {
      $parent_path = 'dossiers';
    }
    elseif ($node->type == 'produit') {
      $parent_path = 'produits';
    }
  }
  elseif ($item['path'] == 'taxonomy/term/%') {
    $term = $item['map'][2];
    if ($term->vocabulary_machine_name == 'lexique') {
      $parent_path = 'lexique';
    }
  }

  // If parent found, set it for menu tree trail future build.
  if ($parent_path) {
    menu_tree_set_path('menu-header-main', $parent_path);
    menu_link_get_preferred($parent_path);

    // Fool drupal so that it take the correct link to build the breadcrumb.
    $preferred_links = &drupal_static('menu_link_get_preferred');
    $preferred_links[$current_path] = $preferred_links[$parent_path];
  }
}

/**
 * Implements hook_menu_breadcrumb_alter().
 */
function fixtrail_menu_breadcrumb_alter(&$active_trail, $item) {
  // Add the current page to the breadcrumb, if not already done.
  $end = end($active_trail);
  if (current_path() != $end['href']) {
    $active_trail[] = $item;
  }
}