<?php

/**

 * @file

 * Administration toolbar for quick access to top level administration items.

 */

/**

 * Implements hook_help().

 */

function toolbar_help($path, $arg) {

  switch ($path) {

    case 'admin/help#toolbar':

      $output = '<h3>' . t('About') . '</h3>';

      $output .= '<p>' . t('The Toolbar module displays links to top-level administration menu items and links from other modules at the top of the screen. For more information, see the online handbook entry for <a href="@toolbar">Toolbar module</a>.', array('@toolbar' => 'http://drupal.org/documentation/modules/toolbar/')) . '</p>';

      $output .= '<h3>' . t('Uses') . '</h3>';

      $output .= '<dl>';

      $output .= '<dt>' . t('Displaying administrative links') . '</dt>';

      $output .= '<dd>' . t('The Toolbar module displays a bar containing top-level administrative links across the top of the screen. Below that, the Toolbar module has a <em>drawer</em> section where it displays links provided by other modules, such as the core <a href="@shortcuts-help">Shortcut module</a>. The drawer can be hidden/shown by using the show/hide shortcuts link at the end of the toolbar.', array('@shortcuts-help' => url('admin/help/shortcut'))) . '</dd>';

      $output .= '</dl>';

      return $output;

  }

}

/**

 * Implements hook_permission().

 */

function toolbar_permission() {

  return array(

    'access toolbar' => array(

      'title' => t('Use the administration toolbar'),

    ),

  );

}

/**

 * Implements hook_theme().

 */

function toolbar_theme($existing, $type, $theme, $path) {

  $items['toolbar'] = array(

    'render element' => 'toolbar',

    'template' => 'toolbar',

    'path' => drupal_get_path('module', 'toolbar'),

  );

  $items['toolbar_toggle'] = array(

    'variables' => array(

      'collapsed' => NULL,

      'attributes' => array(),

    ),

  );

  return $items;

}

/**

 * Implements hook_menu().

 */

function toolbar_menu() {

  $items['toolbar/toggle'] = array(

    'title' => 'Toggle drawer visibility',

    'type' => MENU_CALLBACK,

    'page callback' => 'toolbar_toggle_page',

    'access arguments' => array('access toolbar'),

  );

  return $items;

}

/**

 * Menu callback; toggles the visibility of the toolbar drawer.

 */

function toolbar_toggle_page() {

  global $base_path;

  // Toggle the value in the cookie.

  setcookie('Drupal.toolbar.collapsed', !_toolbar_is_collapsed(), NULL, $base_path);

  // Redirect the user from where he used the toggle element.

  drupal_goto();

}

/**

 * Formats an element used to toggle the toolbar drawer's visibility.

 *

 * @param $variables

 *   An associative array containing:

 *   - collapsed: A boolean value representing the toolbar drawer's visibility.

 *   - attributes: An associative array of HTML attributes.

 *

 * @return

 *   An HTML string representing the element for toggling.

 *

 * @ingroup themable

 */

function theme_toolbar_toggle($variables) {

  if ($variables['collapsed']) {

    $toggle_text = t('Show shortcuts');

  }

  else {

    $toggle_text = t('Hide shortcuts');

    $variables['attributes']['class'][] = 'toggle-active';

  }

  return l($toggle_text, 'toolbar/toggle', array('query' => drupal_get_destination(), 'attributes' => array('title' => $toggle_text) + $variables['attributes']));

}

/**

 * Determines the current state of the toolbar drawer's visibility.

 *

 * @return

 *   TRUE when drawer is collapsed, FALSE when it is expanded.

 */

function _toolbar_is_collapsed() {

  // PHP converts dots into underscores in cookie names to avoid problems with

  // its parser, so we use a converted cookie name.

  return isset($_COOKIE['Drupal_toolbar_collapsed']) ? $_COOKIE['Drupal_toolbar_collapsed'] : 0;

}

/**

 * Implements hook_page_build().

 *

 * Add admin toolbar to the page_top region automatically.

 */

function toolbar_page_build(&$page) {

  $page['page_top']['toolbar'] = array(

    '#pre_render' => array('toolbar_pre_render'),

    '#access' => user_access('access toolbar'),

    'toolbar_drawer' => array(),

  );

}

/**

 * Prerender function for the toolbar.

 *

 * Since building the toolbar takes some time, it is done just prior to

 * rendering to ensure that it is built only if it will be displayed.

 */

function toolbar_pre_render($toolbar) {

  $toolbar = array_merge($toolbar, toolbar_view());

  return $toolbar;

}

/**

 * Implements hook_preprocess_html().

 *

 * Add some page classes, so global page theming can adjust to the toolbar.

 */

function toolbar_preprocess_html(&$vars) {

  if (isset($vars['page']['page_top']['toolbar']) && user_access('access toolbar')) {

    $vars['classes_array'][] = 'toolbar';

    if (!_toolbar_is_collapsed()) {

      $vars['classes_array'][] = 'toolbar-drawer';

    }

  }

}

/**

 * Implements hook_preprocess_toolbar().

 *

 * Adding the 'overlay-displace-top' class to the toolbar pushes the overlay

 * down, so it appears below the toolbar.

 */

function toolbar_preprocess_toolbar(&$variables) {

  $variables['classes_array'][] = "overlay-displace-top";

}

/**

 * Implements hook_system_info_alter().

 *

 * Indicate that the 'page_top' region (in which the toolbar will be displayed)

 * is an overlay supplemental region that should be refreshed whenever its

 * content is updated.

 *

 * This information is provided for any module that might need to use it, not

 * just the core Overlay module.

 */

function toolbar_system_info_alter(&$info, $file, $type) {

  if ($type == 'theme') {

    $info['overlay_supplemental_regions'][] = 'page_top';

  }

}

/**

 * Builds the admin menu as a structured array ready for drupal_render().

 *

 * @return

 *   Array of links and settings relating to the admin menu.

 */

function toolbar_view() {

  global $user;

  $module_path = drupal_get_path('module', 'toolbar');

  $build = array(

    '#theme' => 'toolbar',

    '#attached'=> array(

      'js' => array(

        $module_path . '/toolbar.js',

        array(

          'data' => array('tableHeaderOffset' => 'Drupal.toolbar.height'),

          'type' => 'setting'

        ),

      ),

      'css' => array(

        $module_path . '/toolbar.css',

      ),

      'library' => array(array('system', 'jquery.cookie')),

    ),

  );

  // Retrieve the admin menu from the database.

  $links = toolbar_menu_navigation_links(toolbar_get_menu_tree());

  $build['toolbar_menu'] = array(

    '#theme' => 'links__toolbar_menu',

    '#links' => $links,

    '#attributes' => array('id' => 'toolbar-menu'),

    '#heading' => array('text' => t('Administrative toolbar'), 'level' => 'h2', 'class' => 'element-invisible'),

  );

  // Add logout & user account links or login link.

  if ($user->uid) {

    $links = array(

      'account' => array(

        'title' => t('Hello <strong>@username</strong>', array('@username' => format_username($user))),

        'href' => 'user',

        'html' => TRUE,

        'attributes' => array('title' => t('User account')),

      ),

      'logout' => array(

        'title' => t('Log out'),

        'href' => 'user/logout',

      ),

    );

  }

  else {

     $links = array(

      'login' => array(

        'title' => t('Log in'),

        'href' => 'user',

      ),

    );

  }

  $build['toolbar_user'] = array(

    '#theme' => 'links__toolbar_user',

    '#links' => $links,

    '#attributes' => array('id' => 'toolbar-user'),

  );

  // Add a "home" link.

  $link = array(

    'home' => array(

      'title' => '<span class="home-link">Home</span>',

      'href' => '<front>',

      'html' => TRUE,

      'attributes' => array('title' => t('Home')),

    ),

  );

  $build['toolbar_home'] = array(

    '#theme' => 'links',

    '#links' => $link,

    '#attributes' => array('id' => 'toolbar-home'),

  );

  // Add an anchor to be able to toggle the visibility of the drawer.

  $build['toolbar_toggle'] = array(

    '#theme' => 'toolbar_toggle',

    '#collapsed' => _toolbar_is_collapsed(),

    '#attributes' => array('class' => array('toggle')),

  );

  // Prepare the drawer links CSS classes.

  $toolbar_drawer_classes = array(

    'toolbar-drawer',

    'clearfix',

  );

  if(_toolbar_is_collapsed()) {

    $toolbar_drawer_classes[] = 'collapsed';

  }

  $build['toolbar_drawer_classes'] = implode(' ', $toolbar_drawer_classes);

  return $build;

}

/**

 * Gets only the top level items below the 'admin' path.

 *

 * @return

 *   An array containing a menu tree of top level items below the 'admin' path.

 */

function toolbar_get_menu_tree() {

  $tree = array();

  $admin_link = db_query('SELECT * FROM {menu_links} WHERE menu_name = :menu_name AND module = :module AND link_path = :path', array(':menu_name' => 'management', ':module' => 'system', ':path' => 'admin'))->fetchAssoc();

  if ($admin_link) {

    $tree = menu_build_tree('management', array(

      'expanded' => array($admin_link['mlid']),

      'min_depth' => $admin_link['depth'] + 1,

      'max_depth' => $admin_link['depth'] + 1,

    ));

  }

  return $tree;

}

/**

 * Generates a links array from a menu tree array.

 *

 * Based on menu_navigation_links(). Adds path based IDs and icon placeholders

 * to the links.

 *

 * @return

 *   An array of links as defined above.

 */

function toolbar_menu_navigation_links($tree) {

  $links = array();

  foreach ($tree as $item) {

    if (!$item['link']['hidden'] && $item['link']['access']) {

      // Make sure we have a path specific ID in place, so we can attach icons

      // and behaviors to the items.

      $id = str_replace(array('/', '<', '>'), array('-', '', ''), $item['link']['href']);

      $link = $item['link']['localized_options'];

      $link['href'] = $item['link']['href'];

      // Add icon placeholder.

      $link['title'] = '<span class="icon"></span>' . check_plain($item['link']['title']);

      // Add admin link ID.

      $link['attributes'] = array('id' => 'toolbar-link-' . $id);

      if (!empty($item['link']['description'])) {

        $link['title'] .= ' <span class="element-invisible">(' . $item['link']['description'] . ')</span>';

        $link['attributes']['title'] = $item['link']['description'];

      }

      $link['html'] = TRUE;

      $class = ' path-' . $id;

      if (toolbar_in_active_trail($item['link']['href'])) {

        $class .= ' active-trail';

      }

      $links['menu-' . $item['link']['mlid'] . $class] = $link;

    }

  }

  return $links;

}

/**

 * Checks whether an item is in the active trail.

 *

 * Useful when using a menu generated by menu_tree_all_data() which does

 * not set the 'in_active_trail' flag on items.

 *

 * @return

 *   TRUE when path is in the active trail, FALSE if not.

 *

 * @todo

 *   Look at migrating to a menu system level function.

 */

function toolbar_in_active_trail($path) {

  $active_paths = &drupal_static(__FUNCTION__);

  // Gather active paths.

  if (!isset($active_paths)) {

    $active_paths = array();

    $trail = menu_get_active_trail();

    foreach ($trail as $item) {

      if (!empty($item['href'])) {

        $active_paths[] = $item['href'];

      }

    }

  }

  return in_array($path, $active_paths);

}