<?php
// $Id: advanced_menu.module,v 1.2 2007/02/25 18:12:56 timcn Exp $

/**
 * @file
 * Enables options for every menu item whether it should appear in the breadcrumb,
 * if it should appear in the menu tree, or if should be visible even if it does
 * not have any children.
 *
 * @author Konstantin K?fer
 */

/**
 * Implementation of hook_form_alter().
 */
function advanced_menu_form_menu_edit_item_alter(&$form, $form_state) {

  $item = menu_get_item();
  $type = (int)$item['map'][4]['type'];
  $hidden = (int)$item['map'][4]['hidden'];
  unset($item);

  $form['submit']['#weight'] = 5;

  $form['menu']['options'] = array(
    '#title' => t('Advanced options'),
    '#type' => 'fieldset',
    '#collapsible' => true,
    '#collapsed' => ($hidden == 1) && (($type & MENU_VISIBLE_IN_BREADCRUMB) > 0),
    '#weight' => 1,
    '#tree' => false,
  );

  $form['menu']['options']['tree'] = array(
    '#type' => 'checkbox',
    '#title' => t('Visible in tree views') . (empty($hidden) ? '' : ' ' . t('(currently invisible)')),
    '#default_value' => empty($hidden),
    '#description' => t('Defines whether the menu item should be visible in tree views. (Affects the enabled/disabled option directly)'),
  );

  $form['menu']['options']['breadcrumb'] = array(
    '#type' => 'checkbox',
    '#title' => t('Visible in breadcrumbs'),
    '#default_value' => ($type & MENU_VISIBLE_IN_BREADCRUMB) > 0,
    '#description' => t('Defines whether the menu item should be shown in breadcrumbs.'),
  );

  $form['#submit'][] = 'advanced_menu_edit_item_submit';
}


/**
 * Validate the additional fields and merge them into $form_state['values']['type']
 */
function advanced_menu_edit_item_submit($form, &$form_state) {
//die(var_dump($form, $form_state));
  form_set_value(array('#parents' => array('menu', 'customized')), 1, $form_state);

  if ($form_state['values']['tree']) {
    form_set_value(array('#parents' => array('menu', 'hidden')), 0, $form_state);
//    form_set_value(array('#parents' => array('menu', 'original_item', 'hidden')), 0, $form_state);
//    form_set_value(array('#parents' => array('menu', 'original_item', 'type')), $form_state['values']['menu']['original_item']['type'] |= MENU_VISIBLE_IN_TREE, $form_state);
  }
  else {
    form_set_value(array('#parents' => array('menu', 'hidden')), 1, $form_state);
//    form_set_value(array('#parents' => array('menu', 'original_item', 'hidden')), 1, $form_state);
//    form_set_value(array('#parents' => array('menu', 'original_item', 'type')), $form_state['values']['menu']['original_item']['type'] &= ~MENU_VISIBLE_IN_TREE, $form_state);
  }

  if ($form_state['values']['breadcrumb']) {
    $form_state['values']['menu']['original_item']['type'] |= MENU_VISIBLE_IN_BREADCRUMB;
  }
  else {
    $form_state['values']['menu']['original_item']['type'] &= ~MENU_VISIBLE_IN_BREADCRUMB;
  }
}