drupal/core/modules/toolbar/toolbar.module

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<?php
/**
* @file
* Administration toolbar for quick access to top level administration items.
*/
use Symfony\Component\HttpFoundation\JsonResponse;
use Drupal\Core\Template\Attribute;
/**
* 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 clicking on its corresponding tab.', 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',
);
return $items;
}
/**
* Implements hook_menu().
*/
function toolbar_menu() {
$items['toolbar/subtrees/%'] = array(
'page callback' => 'toolbar_subtrees_jsonp',
'page arguments' => array(2),
'access callback' => '_toolbar_subtrees_access',
'access arguments' => array(2),
'type' => MENU_CALLBACK,
);
return $items;
}
/**
* Access callback: Returns if the user has access to the rendered subtree requested by the hash.
*
* @see toolbar_menu().
*/
function _toolbar_subtrees_access($hash) {
return user_access('access toolbar') && ($hash == _toolbar_get_subtree_hash());
}
/**
* Page callback: Returns the rendered subtree of each top-level toolbar link.
*
* @see toolbar_menu().
*/
function toolbar_subtrees_jsonp($hash) {
_toolbar_initialize_page_cache();
$subtrees = toolbar_get_rendered_subtrees();
$response = new JsonResponse($subtrees);
$response->setCallback('Drupal.toolbar.setSubtrees');
return $response;
}
/**
* Use Drupal's page cache for toolbar/subtrees/*, even for authenticated users.
*
* This gets invoked after full bootstrap, so must duplicate some of what's
* done by _drupal_bootstrap_page_cache().
*
* @todo Replace this hack with something better integrated with DrupalKernel
* once Drupal's page caching itself is properly integrated.
*/
function _toolbar_initialize_page_cache() {
$GLOBALS['conf']['system.performance']['cache']['page']['enabled'] = TRUE;
drupal_page_is_cacheable(TRUE);
// If we have a cache, serve it.
// @see _drupal_bootstrap_page_cache()
$cache = drupal_page_get_cache();
if (is_object($cache)) {
header('X-Drupal-Cache: HIT');
// Restore the metadata cached with the page.
$_GET['q'] = $cache->data['path'];
date_default_timezone_set(drupal_get_user_timezone());
drupal_serve_page_from_cache($cache);
// We are done.
exit;
}
// Otherwise, create a new page response (that will be cached).
header('X-Drupal-Cache: MISS');
// The Expires HTTP header is the heart of the client-side HTTP caching. The
// additional server-side page cache only takes effect when the client
// accesses the callback URL again (e.g., after clearing the browser cache or
// when force-reloading a Drupal page).
$max_age = 3600 * 24 * 365;
drupal_add_http_header('Expires', gmdate(DATE_RFC1123, REQUEST_TIME + $max_age));
drupal_add_http_header('Cache-Control', 'private, max-age=' . $max_age);
}
/**
* Implements hook_page_build().
*
* Add admin toolbar to the page_top region automatically.
*/
function toolbar_page_build(&$page) {
$page['page_top']['toolbar'] = array(
'#pre_render' => array('toolbar_pre_render'),
'#access' => user_access('access toolbar'),
);
}
/**
* Provides pre_render function for the toolbar.
*
* Since building the toolbar takes some time, it is done just prior to
* rendering to ensure that it is built only if it will be displayed.
*
* @see toolbar_page_build().
*/
function toolbar_pre_render($toolbar) {
$toolbar = array_merge($toolbar, toolbar_view());
return $toolbar;
}
/**
* Implements template_preprocess_HOOK().
*/
function template_preprocess_toolbar(&$variables) {
// Metadata for the toolbar wrapping element.
$variables['attributes'] = new Attribute(array(
// The id cannot be simply "toolbar" or it will clash with the simpletest
// tests listing which produces a checkbox with attribute id="toolbar"
'id' => 'toolbar-administration',
// The 'overlay-displace-top' class pushes the overlay down, so it appears
// below the toolbar.
'class' => array('toolbar', 'overlay-displace-top'),
'role' => 'navigation'
));
// Provide a convenience variable for the themed tabs.
$variables['toolbar']['tabs']['#attributes']['class'][] = 'overlay-displace-top';
$variables['tabs'] = $variables['toolbar']['tabs'];
// Place the tabs in a top-level variable so that attribute information
// can be associated with each one.
foreach ($variables['toolbar']['trays'] as $key => $tray) {
// Create tray heading text. Prefer the provided heading text if it exists.
$heading = isset($tray['#heading']) ? $tray['#heading'] : t('@group actions', array('@group' => $key));
$variables['trays'][$key] = array(
'heading' => $heading,
'content' => $variables['toolbar']['trays'][$key],
'attributes' => new Attribute(array(
'id' => 'toolbar-tray-' . $key,
'class' => array('tray', 'overlay-displace-top', $key),
'data-toolbar-tray' => $key,
'aria-owned-by' => 'toolbar-tab-' . $key,
)
),
);
}
}
/**
* Implements hook_system_info_alter().
*
* Indicate that the 'page_top' region (in which the toolbar will be displayed)
* is an overlay supplemental region that should be refreshed whenever its
* content is updated.
*
* This information is provided for any module that might need to use it, not
* just the core Overlay module.
*/
function toolbar_system_info_alter(&$info, $file, $type) {
if ($type == 'theme') {
$info['overlay_supplemental_regions'][] = 'page_top';
}
}
/**
* Implements hook_toolbar().
*/
function toolbar_toolbar() {
$items = array();
// The 'Home' tab is a simple link, with no corresponding tray.
$items['home'] = array(
'tab' => array(
'title' => t('Home'),
'href' => '<front>',
'html' => FALSE,
'attributes' => array(
'title' => t('Home page'),
'class' => array('icon', 'icon-home'),
),
),
'weight' => -20,
);
// Retrieve the administration menu from the database.
$tree = toolbar_get_menu_tree();
// Add attributes to the links before rendering.
toolbar_menu_navigation_links($tree);
$menu = array(
'toolbar_administration' => array(
'#type' => 'container',
'#attributes' => array(
'class' => array('toolbar-menu',),
),
'administration_menu' => menu_tree_output($tree),
),
'#heading' => t('Administration menu'),
);
// To conserve bandwidth, we only include the top-level links in the HTML.
// The subtrees are included in a JSONP script, cached by the browser. Here we
// add that JSONP script. We add it as an external script, because it's a
// Drupal path, not a file available via a stream wrapper.
// @see toolbar_subtrees_jsonp()
$menu['toolbar_administration']['#attached']['js'][url('toolbar/subtrees/' . _toolbar_get_subtree_hash())] = array('type' => 'external');
$items['administration'] = array(
'tab' => array(
'title' => t('Menu'),
'href' => 'admin',
'html' => FALSE,
'attributes' => array(
'title' => t('Admin menu'),
'class' => array('icon', 'icon-menu'),
),
),
'tray' => $menu,
'weight' => -15,
);
return $items;
}
/**
* Builds the Toolbar as a structured array ready for drupal_render().
*
* @return
* A renderable arrray, with two children:
* - 'tabs': an array of links, rendered by theme('links').
* - 'trays': an array of render elements displayed when the corresponding tab
* is activated.
*/
function toolbar_view() {
$build = array('#theme' => 'toolbar');
$build['#attached']['library'][] = array('toolbar', 'toolbar');
// Get the configured breakpoint to switch from vertical to horizontal
// toolbar presentation.
$breakpoints = entity_load('breakpoint_group', 'module.toolbar.toolbar');
if (!empty($breakpoints)) {
$media_queries = array();
$media_queries['toolbar']['breakpoints'] = array_map(
function($object) {return $object->mediaQuery;},
$breakpoints->breakpoints);
$build['#attached']['js'][] = array(
'data' => $media_queries,
'type' => 'setting',
);
// // Load the breakpoints for toolbar.
foreach ($breakpoints->breakpoints as $key => $breakpoint) {
$build['#attached']['js'][0]['data']['toolbar']['breakpoints'][$key] = $breakpoint->mediaQuery;
}
}
// Get toolbar items from all modules that implement hook_toolbar() or
// hook_toolbar_alter().
$toolbar_groups = module_invoke_all('toolbar');
drupal_alter('toolbar', $toolbar_groups);
uasort($toolbar_groups, 'drupal_sort_weight');
// Build the tabs and trays from the toolbar groups.
$build['trays'] = array();
$build['tabs'] = array(
'#theme' => 'links',
'#links' => array(),
'#attributes' => array(
'class' => array('bar', 'clearfix'),
),
'#heading' => array('text' => t('Toolbar'), 'level' => 'h2', 'class' => 'element-invisible'),
);
$tab_defaults = array(
'title' => '',
'href' => '',
'html' => FALSE,
'attributes' => new Attribute(),
);
foreach ($toolbar_groups as $group => $items) {
if ($tab = $items['tab']) {
// Merge in the defaults.
$tab += $tab_defaults;
}
// Register a tray if one is associated with this tab.
if (!empty($items['tray'])) {
// Provide an id, a data attribute linking each tab to the corresponding
// tray and aria information.
$tab['attributes']['id'] = 'toolbar-tab-' . $group;
$tab['attributes']['data-toolbar-tray'] = $group;
$tab['attributes']['aria-owns'] = 'toolbar-tray-' . $group;
$tab['attributes']['role'] = 'button';
$tab['attributes']['aria-pressed'] = 'false';
if (array_key_exists($group, $build['trays'])) {
array_merge($build['trays'][$group], $items['tray']);
}
else {
// Assign the tray to the build.
$build['trays'][$group] = $items['tray'];
}
}
// Assign the tabs to the build.
$build['tabs']['#links'][$group] = $tab;
}
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();
$admin_link = db_query('SELECT * FROM {menu_links} WHERE menu_name = :menu_name AND module = :module AND link_path = :path', array(':menu_name' => 'admin', ':module' => 'system', ':path' => 'admin'))->fetchAssoc();
if ($admin_link) {
$tree = menu_build_tree('admin', array(
'expanded' => array($admin_link['mlid']),
'min_depth' => $admin_link['depth'] + 1,
'max_depth' => $admin_link['depth'] + 1,
));
}
return $tree;
}
/**
* Generates an array of links from a menu tree array.
*
* Based on menu_navigation_links(). Adds path based IDs and icon placeholders
* to the links.
*
* @return
* An array of links as defined above.
*/
function toolbar_menu_navigation_links(&$tree) {
foreach ($tree as $key => $item) {
// Configure sub-items.
if (!empty($item['below'])) {
toolbar_menu_navigation_links($tree[$key]['below']);
}
// Make sure we have a path specific ID in place, so we can attach icons
// and behaviors to the items.
$tree[$key]['link']['localized_options']['attributes'] = array(
'id' => 'toolbar-link-' . str_replace(array('/', '<', '>'), array('-', '', ''), $item['link']['link_path']),
'class' => array(
'icon',
'icon-' . strtolower(str_replace(' ', '-', $item['link']['title'])),
),
);
}
}
/**
* Returns the rendered subtree of each top-level toolbar link.
*/
function toolbar_get_rendered_subtrees() {
$subtrees = array();
$tree = toolbar_get_menu_tree();
foreach ($tree as $tree_item) {
$item = $tree_item['link'];
if (!$item['hidden'] && $item['access']) {
if ($item['has_children']) {
$query = db_select('menu_links');
$query->addField('menu_links', 'mlid');
$query->condition('has_children', 1);
for ($i=1; $i <= $item['depth']; $i++) {
$query->condition('p' . $i, $item['p' . $i]);
}
$parents = $query->execute()->fetchCol();
$subtree = menu_build_tree($item['menu_name'], array('expanded' => $parents, 'min_depth' => $item['depth']+1));
toolbar_menu_navigation_links($subtree);
$subtree = menu_tree_output($subtree);
$subtree = drupal_render($subtree);
}
else {
$subtree = '';
}
$id = str_replace(array('/', '<', '>'), array('-', '', ''), $item['href']);
$subtrees[$id] = $subtree;
}
}
return $subtrees;
}
/**
* Checks whether an item is in the active trail.
*
* Useful when using a menu generated by menu_tree_all_data() which does
* not set the 'in_active_trail' flag on items.
*
* @return
* TRUE when path is in the active trail, FALSE if not.
*
* @todo
* Look at migrating to a menu system level function.
*/
function toolbar_in_active_trail($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);
}
/**
* Implements hook_library_info().
*/
function toolbar_library_info() {
$libraries['toolbar'] = array(
'title' => 'Toolbar',
'version' => VERSION,
'js' => array(
drupal_get_path('module', 'toolbar') . '/js/toolbar.js' => array(),
),
'css' => array(
drupal_get_path('module', 'toolbar') . '/css/toolbar.base.css',
drupal_get_path('module', 'toolbar') . '/css/toolbar.theme.css',
drupal_get_path('module', 'toolbar') . '/css/toolbar.icons.css',
),
'dependencies' => array(
array('system', 'jquery'),
array('system', 'drupal'),
array('system', 'drupalSettings'),
array('system', 'matchmedia'),
array('system', 'jquery.once'),
array('system', 'drupal.debounce'),
array('toolbar', 'toolbar.menu'),
),
);
$libraries['toolbar.menu'] = array(
'title' => 'Toolbar nested accordion menus.',
'version' => VERSION,
'js' => array(
drupal_get_path('module', 'toolbar') . '/js/toolbar.menu.js' => array(),
),
'css' => array(
drupal_get_path('module', 'toolbar') . '/css/toolbar.menu.css',
),
'dependencies' => array(
array('system', 'jquery'),
array('system', 'drupal'),
array('system', 'jquery.once'),
),
);
return $libraries;
}
/**
* Implements hook_cache_flush().
*/
function toolbar_cache_flush() {
return array('toolbar');
}
/**
* Returns the hash of the per-user rendered toolbar subtrees.
*/
function _toolbar_get_subtree_hash() {
global $user;
$cid = $user->uid . ':' . language(LANGUAGE_TYPE_INTERFACE)->langcode;
if ($cache = cache('toolbar')->get($cid)) {
$hash = $cache->data;
}
else {
$subtrees = toolbar_get_rendered_subtrees();
$hash = drupal_hash_base64(serialize($subtrees));
cache('toolbar')->set($cid, $hash);
}
return $hash;
}