Support additional custom configuration for each variant

The revised patch (drupal_alter() arguments are more proper).

The module example - setting the active path for taxonomy menu:

function taxonomy_menu_trail_mutator_path_breadcrumbs_settings_form_custom_alter(&$form, $breadcrumb) {
  $item = (isset($breadcrumb->custom['taxonomy_menu_active_item']) ? $breadcrumb->custom['taxonomy_menu_active_item'] : '');
  $form['taxonomy_menu_form_mutator_active_item'] = array(
    '#title' => 'Active menu link (term ID)',
    '#type' => 'textfield',
    '#default_value' => $item,
  );
}

function taxonomy_menu_trail_mutator_path_breadcrumbs_settings_form_submit_custom_alter(&$custom, $form_state) {
  $custom['taxonomy_menu_active_item'] = (isset($form_state['values']['taxonomy_menu_form_mutator_active_item']) ? $form_state['values']['taxonomy_menu_form_mutator_active_item'] : '');
}

function taxonomy_menu_trail_mutator_path_breadcrumbs_view_alter($breadcrumb, $path_breadcrumb, $contexts) {
  $item = isset($path_breadcrumb->custom['taxonomy_menu_active_item']) ? $path_breadcrumb->custom['taxonomy_menu_active_item'] : '';
  $tid = ctools_context_keyword_substitute($item, array(), $contexts);
  if (($tid) && ($term = taxonomy_term_load($tid))) {
    $path = taxonomy_menu_path_get($term->vid, $term->tid); // This will be changed in the next version of taxonomy_menu.
    menu_tree_set_path('main-menu', $path);
  }
}

Any chances to accept this patch? :)

The code is in the comment #2. It enables to select a token expression to configure the active menu item if the main menu is generated by Taxonomy Menu module. So you can map any page of the site to the menu item.

Спасибо, Евгений.