drupal/core/modules/toolbar/toolbar.module

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<?php
/**
* @file
* Administration toolbar for quick access to top level administration items.
*/
use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\Core\Language\Language;
use Drupal\Core\Template\Attribute;
use Drupal\Component\Utility\Crypt;
use Symfony\Component\HttpFoundation\Response;
use Drupal\menu_link\MenuLinkInterface;
use Drupal\user\RoleInterface;
use Drupal\user\UserInterface;
/**
* 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 components 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' => 'element',
);
$items['toolbar_item'] = array(
'render element' => 'element',
);
$items['toolbar_tab_wrapper'] = array(
'render element' => 'element',
);
$items['toolbar_tray_wrapper'] = array(
'render element' => 'element',
);
$items['toolbar_tray_heading_wrapper'] = array(
'render element' => 'element',
);
return $items;
}
/**
* Implements hook_element_info().
*/
function toolbar_element_info() {
$elements = array();
$elements['toolbar'] = array(
'#pre_render' => array('toolbar_pre_render'),
'#theme' => 'toolbar',
'#attached' => array(
'library' => array(
array('toolbar', 'toolbar'),
),
),
// Metadata for the toolbar wrapping element.
'#attributes' => 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',
'class' => array('toolbar'),
'role' => 'navigation',
),
// Metadata for the administration bar.
'#bar' => array(
'#heading' => t('Toolbar items'),
'#attributes' => array(
'id' => 'toolbar-bar',
'class' => array('toolbar-bar', 'clearfix'),
),
),
);
// A toolbar item is wrapped in markup for common styling. The 'tray'
// property contains a renderable array. theme_toolbar_tab() is a light
// wrapper around the l() function. The contents of tray are rendered in
// theme_toolbar_tab().
$elements['toolbar_item'] = array(
'#pre_render' => array('toolbar_pre_render_item'),
'#theme' => 'toolbar_item',
'#theme_wrappers' => array('toolbar_tab_wrapper'),
'tab' => array(
'#type' => 'link',
'#title' => NULL,
'#href' => '',
),
);
return $elements;
}
/**
* 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()
$request = \Drupal::request();
$cache = drupal_page_get_cache($request);
if (is_object($cache)) {
$response = new Response();
$response->headers->set('X-Drupal-Cache', 'HIT');
date_default_timezone_set(drupal_get_user_timezone());
drupal_serve_page_from_cache($cache, $response, $request);
$response->prepare($request);
$response->send();
// We are done.
exit;
}
// Otherwise, create a new page response (that will be cached).
drupal_add_http_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(
'#type' => 'toolbar',
'#access' => user_access('access toolbar'),
);
}
/**
* Builds the Toolbar as a structured array ready for drupal_render().
*
* 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.
*
* @param array $element
* A renderable array.
*
* @return
* A renderable array.
*
* @see toolbar_page_build().
*/
function toolbar_pre_render($element) {
// Get the configured breakpoints 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->getBreakpoints()
);
$element['#attached']['js'][] = array(
'data' => $media_queries,
'type' => 'setting',
);
}
// Get toolbar items from all modules that implement hook_toolbar().
$items = \Drupal::moduleHandler()->invokeAll('toolbar');
// Allow for altering of hook_toolbar().
drupal_alter('toolbar', $items);
// Sort the children.
uasort($items, 'element_sort');
// Merge in the original toolbar values.
$element = array_merge($element, $items);
// Render the children.
$element['#children'] = drupal_render_children($element);
return $element;
}
/**
* Returns HTML that wraps the administration toolbar.
*
* @param array $variables
* An associative array containing:
* - element: An associative array containing the properties and children of
* the tray. Properties used: #children, #attributes and #bar.
*/
function theme_toolbar(&$variables) {
if (!empty($variables['element']['#children'])) {
$element = $variables['element'];
$trays = '';
foreach (element_children($element) as $key) {
$trays .= drupal_render($element[$key]['tray']);
}
return '<nav' . new Attribute($element['#attributes']) . '>'
. '<div' . new Attribute($element['#bar']['#attributes']) . '>'
. '<h2 class="visually-hidden">' . $element['#bar']['#heading'] . '</h2>'
. $element['#children'] . '</div>' . $trays . '</nav>';
}
}
/**
* Provides markup for associating a tray trigger with a tray element.
*
* A tray is a responsive container that wraps renderable content. Trays present
* content well on small and large screens alike.
*
* @param array $element
* A renderable array.
*
* @return
* A renderable array.
*/
function toolbar_pre_render_item($element) {
// Assign each item a unique ID.
$id = drupal_html_id('toolbar-item');
// Provide attributes for a toolbar item.
$attributes = array(
'id' => $id,
);
// If tray content is present, markup the tray and its associated trigger.
if (!empty($element['tray'])) {
// Provide attributes necessary for trays.
$attributes += array(
'data-toolbar-tray' => $id . '-tray',
'aria-owns' => $id,
'role' => 'button',
'aria-pressed' => 'false',
);
// Merge in module-provided attributes.
$element['tab'] += array('#attributes' => array());
$element['tab']['#attributes'] += $attributes;
$element['tab']['#attributes']['class'][] = 'trigger';
// Provide attributes for the tray theme wrapper.
$attributes = array(
'id' => $id . '-tray',
'data-toolbar-tray' => $id . '-tray',
'aria-owned-by' => $id,
);
// Merge in module-provided attributes.
if (!isset($element['tray']['#wrapper_attributes'])) {
$element['tray']['#wrapper_attributes'] = array();
}
$element['tray']['#wrapper_attributes'] += $attributes;
$element['tray']['#wrapper_attributes']['class'][] = 'toolbar-tray';
if (!isset($element['tray']['#theme_wrappers'])) {
$element['tray']['#theme_wrappers'] = array();
}
// Add the standard theme_wrapper for trays.
array_unshift($element['tray']['#theme_wrappers'], 'toolbar_tray_wrapper');
// Add the theme wrapper for the tray heading.
array_unshift($element['tray']['#theme_wrappers'], 'toolbar_tray_heading_wrapper');
}
return $element;
}
/**
* Implements template_preprocess_HOOK().
*/
function template_preprocess_toolbar_tab_wrapper(&$variables) {
if (!isset($variables['element']['#wrapper_attributes'])) {
$variables['element']['#wrapper_attributes'] = array();
}
$variables['element']['#wrapper_attributes']['class'][] = 'toolbar-tab';
}
/**
* Returns HTML for a toolbar item.
*
* This theme function only renders the tab portion of the toolbar item. The
* tray portion will be rendered later.
*
* @param array $variables
* An associative array containing:
* - element: An associative array containing the properties and children of
* the tray. Property used: tab.
*
* @see toolbar_pre_render_item().
* @see theme_toolbar().
*/
function theme_toolbar_item(&$variables) {
return drupal_render($variables['element']['tab']);
}
/**
* Returns HTML for wrapping a toolbar tab.
*
* Toolbar tabs have a common styling and placement with the toolbar's bar area.
*
* @param array $variables
* An associative array containing:
* - element: An associative array containing the properties and children of
* the tray. Properties used: #children and #attributes.
*/
function theme_toolbar_tab_wrapper(&$variables) {
if (!empty($variables['element']['#children'])) {
$element = $variables['element'];
return '<div' . new Attribute($element['#wrapper_attributes']) . '>' . $element['#children'] . '</div>';
}
}
/**
* Returns HTML for wrapping a toolbar tray.
*
* Used in combination with theme_toolbar_tab() to create an
* association between a link tag in the administration bar and a tray.
*
* @param array $variables
* An associative array containing:
* - element: An associative array containing the properties and children of
* the tray. Properties used: #children, #toolbar_identifier and
* #attributes.
*/
function theme_toolbar_tray_wrapper(&$variables) {
if (!empty($variables['element']['#children'])) {
$element = $variables['element'];
return '<div' . new Attribute($element['#wrapper_attributes']) . '><div class="toolbar-lining clearfix">' . $element['#children'] . '</div></div>';
}
}
/**
* Returns HTML for prepending a heading to a toolbar tray.
*
* @param array $variables
* An associative array containing:
* - element: An associative array containing the properties and children of
* the tray. Properties used: #children and #heading.
*/
function theme_toolbar_tray_heading_wrapper(&$variables) {
$element = $variables['element'];
if (!empty($element['#children'])) {
$heading = '';
if (!empty($element['#heading'])) {
$heading = '<h3 class="toolbar-tray-name visually-hidden">' . $element['#heading'] . '</h3>';
}
return $heading . $element['#children'];
}
}
/**
* Implements hook_toolbar().
*/
function toolbar_toolbar() {
$items = array();
// The 'Home' tab is a simple link, with no corresponding tray.
$items['home'] = array(
'#type' => 'toolbar_item',
'tab' => array(
'#type' => 'link',
'#title' => t('Back to site'),
'#href' => '<front>',
'#options' => array(
'attributes' => array(
'title' => t('Return to site content'),
'class' => array('toolbar-icon', 'toolbar-icon-escape-admin'),
'data-toolbar-escape-admin' => TRUE,
),
),
),
'#wrapper_attributes' => array(
'class' => array('hidden'),
),
'#attached' => array(
'library' => array(
array('toolbar', 'toolbar.escapeAdmin'),
),
),
'#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);
$menu = array(
'#heading' => t('Administration menu'),
'toolbar_administration' => array(
'#type' => 'container',
'#attributes' => array(
'class' => array('toolbar-menu-administration'),
),
'administration_menu' => menu_tree_output($tree),
),
);
// To conserve bandwidth, we only include the top-level links in the HTML.
// The subtrees are fetched through a JSONP script that is generated at the
// toolbar_subtrees route. We provide the JavaScript requesting that JSONP
// script here with the hash parameter that is needed for that route.
// @see toolbar_subtrees_jsonp()
$menu['toolbar_administration']['#attached']['js'][] = array(
'type' => 'setting',
'data' => array('toolbar' => array(
'subtreesHash' => _toolbar_get_subtrees_hash(),
)),
);
// The administration element has a link that is themed to correspond to
// a toolbar tray. The tray contains the full administrative menu of the site.
$items['administration'] = array(
'#type' => 'toolbar_item',
'tab' => array(
'#type' => 'link',
'#title' => t('Menu'),
'#href' => 'admin',
'#options' => array(
'attributes' => array(
'title' => t('Admin menu'),
'class' => array('toolbar-icon', 'toolbar-icon-menu'),
// A data attribute that indicates to the client to defer loading of
// the admin menu subtrees until this tab is activated. Admin menu
// subtrees will not render to the DOM if this attribute is removed.
// The value of the attribute is intentionally left blank. Only the
// presence of the attribute is necessary.
'data-drupal-subtrees' => '',
),
),
),
'tray' => $menu,
'#weight' => -15,
);
return $items;
}
/**
* 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();
$query = \Drupal::entityQuery('menu_link')
->condition('menu_name', 'admin')
->condition('module', 'system')
->condition('link_path', 'admin');
$result = $query->execute();
if (!empty($result)) {
$admin_link = menu_link_load(reset($result));
$tree = menu_build_tree('admin', array(
'expanded' => array($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(
'toolbar-icon',
'toolbar-icon-' . strtolower(str_replace(' ', '-', $item['link']['link_title'])),
),
'title' => check_plain($item['link']['description']),
);
}
}
/**
* 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;
}
/**
* Implements hook_library_info().
*/
function toolbar_library_info() {
$libraries['toolbar'] = array(
'title' => 'Toolbar',
'version' => \Drupal::VERSION,
'js' => array(
drupal_get_path('module', 'toolbar') . '/js/toolbar.js' => array(),
),
'css' => array(
drupal_get_path('module', 'toolbar') . '/css/toolbar.module.css',
drupal_get_path('module', 'toolbar') . '/css/toolbar.theme.css',
drupal_get_path('module', 'toolbar') . '/css/toolbar.icons.css',
),
'dependencies' => array(
array('system', 'modernizr'),
array('system', 'jquery'),
array('system', 'drupal'),
array('system', 'drupalSettings'),
array('system', 'drupal.announce'),
array('system', 'backbone'),
array('system', 'matchmedia'),
array('system', 'jquery.once'),
array('system', 'drupal.displace'),
array('toolbar', 'toolbar.menu'),
),
);
$libraries['toolbar.menu'] = array(
'title' => 'Toolbar nested accordion menus.',
'version' => \Drupal::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'),
),
);
$libraries['toolbar.escapeAdmin'] = array(
'title' => 'Provides a button to escape the administration area.',
'version' => \Drupal::VERSION,
'js' => array(
drupal_get_path('module', 'toolbar') . '/js/escapeAdmin.js',
),
'dependencies' => array(
array('system', 'jquery'),
array('system', 'drupal'),
array('system', 'drupalSettings'),
array('system', 'jquery.once'),
),
);
return $libraries;
}
/**
* Returns the hash of the per-user rendered toolbar subtrees.
*
* @return string
* The hash of the admin_menu subtrees.
*/
function _toolbar_get_subtrees_hash() {
$uid = \Drupal::currentUser()->id();
$cid = _toolbar_get_user_cid($uid);
if ($cache = cache('toolbar')->get($cid)) {
$hash = $cache->data;
}
else {
$subtrees = toolbar_get_rendered_subtrees();
$hash = Crypt::hashBase64(serialize($subtrees));
// Cache using a tag 'user' so that we can invalidate all user-specific
// caches later, based on the user's ID regardless of language.
// Clear the cache when the 'locale' tag is deleted. This ensures a fresh
// subtrees rendering when string translations are made.
cache('toolbar')->set($cid, $hash, CacheBackendInterface::CACHE_PERMANENT, array('user' => array($uid), 'locale' => TRUE,));
}
return $hash;
}
/**
* Implements hook_modules_installed().
*/
function toolbar_modules_installed($modules) {
_toolbar_clear_user_cache();
}
/**
* Implements hook_modules_uninstalled().
*/
function toolbar_modules_uninstalled($modules) {
_toolbar_clear_user_cache();
}
/**
* Implements hook_ENTITY_TYPE_update().
*/
function toolbar_menu_link_update(MenuLinkInterface $menu_link) {
if ($menu_link->menu_name === 'admin') {
_toolbar_clear_user_cache();
}
}
/**
* Implements hook_ENTITY_TYPE_update().
*/
function toolbar_user_update(UserInterface $user) {
_toolbar_clear_user_cache($user->id());
}
/**
* Implements hook_ENTITY_TYPE_update().
*/
function toolbar_user_role_update(RoleInterface $role) {
_toolbar_clear_user_cache();
}
/**
* Returns a cache ID from the user and language IDs.
*
* @param int $uid
* A user ID.
*
* @return string
* A unique cache ID for the user.
*/
function _toolbar_get_user_cid($uid) {
return $uid . ':' . \Drupal::languageManager()->getLanguage(Language::TYPE_INTERFACE)->id;
}
/**
* Clears the Toolbar user cache.
*
* @param int $uid
* (optional) The user ID whose toolbar cache entry to clear.
*/
function _toolbar_clear_user_cache($uid = NULL) {
$cache = cache('toolbar');
if (!$cache->isEmpty()) {
// Clear by the 'user' tag in order to delete all caches, in any language,
// associated with this user.
if (isset($uid)) {
$cache->deleteTags(array('user' => array($uid)));
} else {
$cache->deleteAll();
}
}
}