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<?php
/**
* @file
* API for the Drupal menu system.
*/
/**
* @defgroup menu Menu system
* @{
* Define the navigation menus, and route page requests to code based on URLs.
*
* The Drupal menu system drives both the navigation system from a user
* perspective and the callback system that Drupal uses to respond to URLs
* passed from the browser. For this reason, a good understanding of the
* menu system is fundamental to the creation of complex modules. As a note,
* this is related to, but separate from menu.module, which allows menus
* (which in this context are hierarchical lists of links) to be customized from
* the Drupal administrative interface.
*
* Drupal's menu system follows a simple hierarchy defined by paths.
* Implementations of hook_menu() define menu items and assign them to
* paths (which should be unique). The menu system aggregates these items
* and determines the menu hierarchy from the paths. For example, if the
* paths defined were a, a/b, e, a/b/c/d, f/g, and a/b/h, the menu system
* would form the structure:
* - a
* - a/b
* - a/b/c/d
* - a/b/h
* - e
* - f/g
* Note that the number of elements in the path does not necessarily
* determine the depth of the menu item in the tree.
*
* When responding to a page request, the menu system looks to see if the
* path requested by the browser is registered as a menu item with a
* callback. If not, the system searches up the menu tree for the most
* complete match with a callback it can find. If the path a/b/i is
* requested in the tree above, the callback for a/b would be used.
*
* The found callback function is called with any arguments specified
* in the "page arguments" attribute of its menu item. The
* attribute must be an array. After these arguments, any remaining
* components of the path are appended as further arguments. In this
* way, the callback for a/b above could respond to a request for
* a/b/i differently than a request for a/b/j.
*
* For an illustration of this process, see page_example.module.
*
* Access to the callback functions is also protected by the menu system.
* The "access callback" with an optional "access arguments" of each menu
* item is called before the page callback proceeds. If this returns TRUE,
* then access is granted; if FALSE, then access is denied. Default local task
* menu items (see next paragraph) may omit this attribute to use the value
* provided by the parent item.
*
* In the default Drupal interface, you will notice many links rendered as
* tabs. These are known in the menu system as "local tasks", and they are
* rendered as tabs by default, though other presentations are possible.
* Local tasks function just as other menu items in most respects. It is
* convention that the names of these tasks should be short verbs if
* possible. In addition, a "default" local task should be provided for
* each set. When visiting a local task's parent menu item, the default
* local task will be rendered as if it is selected; this provides for a
* normal tab user experience. This default task is special in that it
* links not to its provided path, but to its parent item's path instead.
* The default task's path is only used to place it appropriately in the
* menu hierarchy.
*
* Everything described so far is stored in the menu_router table. The
* menu_links table holds the visible menu links. By default these are
* derived from the same hook_menu definitions, however you are free to
* add more with menu_link_save().
*/
/**
* @defgroup menu_flags Menu flags
* @{
* Flags for use in the "type" attribute of menu items.
*/
/**
* Internal menu flag -- menu item is the root of the menu tree.
*/
define('MENU_IS_ROOT', 0x0001);
/**
* Internal menu flag -- menu item is visible in the menu tree.
*/
define('MENU_VISIBLE_IN_TREE', 0x0002);
/**
* Internal menu flag -- menu item is visible in the breadcrumb.
*/
define('MENU_VISIBLE_IN_BREADCRUMB', 0x0004);
/**
* Internal menu flag -- menu item links back to its parent.
*/
define('MENU_LINKS_TO_PARENT', 0x0008);
/**
* Internal menu flag -- menu item can be modified by administrator.
*/
define('MENU_MODIFIED_BY_ADMIN', 0x0020);
/**
* Internal menu flag -- menu item was created by administrator.
*/
define('MENU_CREATED_BY_ADMIN', 0x0040);
/**
* Internal menu flag -- menu item is a local task.
*/
define('MENU_IS_LOCAL_TASK', 0x0080);
/**
* Internal menu flag -- menu item is a local action.
*/
define('MENU_IS_LOCAL_ACTION', 0x0100);
/**
* @} End of "Menu flags".
*/
/**
* @defgroup menu_item_types Menu item types
* @{
* Definitions for various menu item types.
*
* Menu item definitions provide one of these constants, which are shortcuts for
* combinations of @link menu_flags Menu flags @endlink.
*/
/**
* Menu type -- A "normal" menu item that's shown in menu and breadcrumbs.
*
* Normal menu items show up in the menu tree and can be moved/hidden by
* the administrator. Use this for most menu items. It is the default value if
* no menu item type is specified.
*/
define('MENU_NORMAL_ITEM', MENU_VISIBLE_IN_TREE | MENU_VISIBLE_IN_BREADCRUMB);
/**
* Menu type -- A hidden, internal callback, typically used for API calls.
*
* Callbacks simply register a path so that the correct function is fired
* when the URL is accessed. They do not appear in menus or breadcrumbs.
*/
define('MENU_CALLBACK', 0x0000);
/**
* Menu type -- A normal menu item, hidden until enabled by an administrator.
*
* Modules may "suggest" menu items that the administrator may enable. They act
* just as callbacks do until enabled, at which time they act like normal items.
* Note for the value: 0x0010 was a flag which is no longer used, but this way
* the values of MENU_CALLBACK and MENU_SUGGESTED_ITEM are separate.
*/
define('MENU_SUGGESTED_ITEM', MENU_VISIBLE_IN_BREADCRUMB | 0x0010);
/**
* Menu type -- A task specific to the parent item, usually rendered as a tab.
*
* Local tasks are menu items that describe actions to be performed on their
* parent item. An example is the path "node/52/edit", which performs the
* "edit" task on "node/52".
*/
define('MENU_LOCAL_TASK', MENU_IS_LOCAL_TASK | MENU_VISIBLE_IN_BREADCRUMB);
/**
* Menu type -- The "default" local task, which is initially active.
*
* Every set of local tasks should provide one "default" task, that links to the
* same path as its parent when clicked.
*/
define('MENU_DEFAULT_LOCAL_TASK', MENU_IS_LOCAL_TASK | MENU_LINKS_TO_PARENT | MENU_VISIBLE_IN_BREADCRUMB);
/**
* Menu type -- An action specific to the parent, usually rendered as a link.
*
* Local actions are menu items that describe actions on the parent item such
* as adding a new user, taxonomy term, etc.
*/
define('MENU_LOCAL_ACTION', MENU_IS_LOCAL_TASK | MENU_IS_LOCAL_ACTION | MENU_VISIBLE_IN_BREADCRUMB);
/**
* @} End of "Menu item types".
*/
/**
* @defgroup menu_context_types Menu context types
* @{
* Flags for use in the "context" attribute of menu router items.
*/
/**
* Internal menu flag: Invisible local task.
*
* This flag may be used for local tasks like "Delete", so custom modules and
* themes can alter the default context and expose the task by altering menu.
*/
define('MENU_CONTEXT_NONE', 0x0000);
/**
* Internal menu flag: Local task should be displayed in page context.
*/
define('MENU_CONTEXT_PAGE', 0x0001);
/**
* Internal menu flag: Local task should be displayed inline.
*/
define('MENU_CONTEXT_INLINE', 0x0002);
/**
* @} End of "Menu context types".
*/
/**
* @defgroup menu_status_codes Menu status codes
* @{
* Status codes for menu callbacks.
*/
/**
* Internal menu status code -- Menu item was found.
*/
define('MENU_FOUND', 1);
/**
* Internal menu status code -- Menu item was not found.
*/
define('MENU_NOT_FOUND', 2);
/**
* Internal menu status code -- Menu item access is denied.
*/
define('MENU_ACCESS_DENIED', 3);
/**
* Internal menu status code -- Menu item inaccessible because site is offline.
*/
define('MENU_SITE_OFFLINE', 4);
/**
* Internal menu status code -- Everything is working fine.
*/
define('MENU_SITE_ONLINE', 5);
/**
* @} End of "Menu status codes".
*/
/**
* @defgroup menu_tree_parameters Menu tree parameters
* @{
* Parameters for a menu tree.
*/
/**
* The maximum number of path elements for a menu callback
*/
define('MENU_MAX_PARTS', 9);
/**
* The maximum depth of a menu links tree - matches the number of p columns.
*/
define('MENU_MAX_DEPTH', 9);
/**
* @} End of "Menu tree parameters".
*/
/**
* Reserved key to identify the most specific menu link for a given path.
*
* The value of this constant is a hash of the constant name. We use the hash
* so that the reserved key is over 32 characters in length and will not
* collide with allowed menu names:
* @code
* sha1('MENU_PREFERRED_LINK') = 1cf698d64d1aa4b83907cf6ed55db3a7f8e92c91
* @endcode
*
* @see menu_link_get_preferred()
*/
define('MENU_PREFERRED_LINK', '1cf698d64d1aa4b83907cf6ed55db3a7f8e92c91');
/**
* Returns the ancestors (and relevant placeholders) for any given path.
*
* For example, the ancestors of node/12345/edit are:
* - node/12345/edit
* - node/12345/%
* - node/%/edit
* - node/%/%
* - node/12345
* - node/%
* - node
*
* To generate these, we will use binary numbers. Each bit represents a
* part of the path. If the bit is 1, then it represents the original
* value while 0 means wildcard. If the path is node/12/edit/foo
* then the 1011 bitstring represents node/%/edit/foo where % means that
* any argument matches that part. We limit ourselves to using binary
* numbers that correspond the patterns of wildcards of router items that
* actually exists. This list of 'masks' is built in menu_rebuild().
*
* @param $parts
* An array of path parts; for the above example,
* array('node', '12345', 'edit').
*
* @return
* An array which contains the ancestors and placeholders. Placeholders
* simply contain as many '%s' as the ancestors.
*/
function menu_get_ancestors($parts) {
$number_parts = count($parts);
$ancestors = array();
$length = $number_parts - 1;
$end = (1 << $number_parts) - 1;
$masks = variable_get('menu_masks');
// If the optimized menu_masks array is not available use brute force to get
// the correct $ancestors and $placeholders returned. Do not use this as the
// default value of the menu_masks variable to avoid building such a big
// array.
if (!$masks) {
$masks = range(511, 1);
}
// Only examine patterns that actually exist as router items (the masks).
foreach ($masks as $i) {
if ($i > $end) {
// Only look at masks that are not longer than the path of interest.
continue;
}
elseif ($i < (1 << $length)) {
// We have exhausted the masks of a given length, so decrease the length.
--$length;
}
$current = '';
for ($j = $length; $j >= 0; $j--) {
// Check the bit on the $j offset.
if ($i & (1 << $j)) {
// Bit one means the original value.
$current .= $parts[$length - $j];
}
else {
// Bit zero means means wildcard.
$current .= '%';
}
// Unless we are at offset 0, add a slash.
if ($j) {
$current .= '/';
}
}
$ancestors[] = $current;
}
return $ancestors;
}
/**
* Unserializes menu data, using a map to replace path elements.
*
* The menu system stores various path-related information (such as the 'page
* arguments' and 'access arguments' components of a menu item) in the database
* using serialized arrays, where integer values in the arrays represent
* arguments to be replaced by values from the path. This function first
* unserializes such menu information arrays, and then does the path
* replacement.
*
* The path replacement acts on each integer-valued element of the unserialized
* menu data array ($data) using a map array ($map, which is typically an array
* of path arguments) as a list of replacements. For instance, if there is an
* element of $data whose value is the number 2, then it is replaced in $data
* with $map[2]; non-integer values in $data are left alone.
*
* As an example, an unserialized $data array with elements ('node_load', 1)
* represents instructions for calling the node_load() function. Specifically,
* this instruction says to use the path component at index 1 as the input
* parameter to node_load(). If the path is 'node/123', then $map will be the
* array ('node', 123), and the returned array from this function will have
* elements ('node_load', 123), since $map[1] is 123. This return value will
* indicate specifically that node_load(123) is to be called to load the node
* whose ID is 123 for this menu item.
*
* @param $data
* A serialized array of menu data, as read from the database.
* @param $map
* A path argument array, used to replace integer values in $data; an integer
* value N in $data will be replaced by value $map[N]. Typically, the $map
* array is generated from a call to the arg() function.
*
* @return
* The unserialized $data array, with path arguments replaced.
*/
function menu_unserialize($data, $map) {
if ($data = unserialize($data)) {
foreach ($data as $k => $v) {
if (is_int($v)) {
$data[$k] = isset($map[$v]) ? $map[$v] : '';
}
}
return $data;
}
else {
return array();
}
}
/**
* Replaces the statically cached item for a given path.
*
* @param $path
* The path.
* @param $router_item
* The router item. Usually a router entry from menu_get_item() is either
* modified or set to a different path. This allows the navigation block,
* the page title, the breadcrumb, and the page help to be modified in one
* call.
*/
function menu_set_item($path, $router_item) {
menu_get_item($path, $router_item);
}
/**
* Gets a router item.
*
* @param $path
* The path; for example, 'node/5'. The function will find the corresponding
* node/% item and return that.
* @param $router_item
* Internal use only.
*
* @return
* The router item or, if an error occurs in _menu_translate(), FALSE. A
* router item is an associative array corresponding to one row in the
* menu_router table. The value corresponding to the key 'map' holds the
* loaded objects. The value corresponding to the key 'access' is TRUE if the
* current user can access this page. The values corresponding to the keys
* 'title', 'page_arguments', 'access_arguments', and 'theme_arguments' will
* be filled in based on the database values and the objects loaded.
*/
function menu_get_item($path = NULL, $router_item = NULL) {
$router_items = &drupal_static(__FUNCTION__);
if (!isset($path)) {
$path = $_GET['q'];
}
if (isset($router_item)) {
$router_items[$path] = $router_item;
}
if (!isset($router_items[$path])) {
// Rebuild if we know it's needed, or if the menu masks are missing which
// occurs rarely, likely due to a race condition of multiple rebuilds.
if (variable_get('menu_rebuild_needed', FALSE) || !variable_get('menu_masks', array())) {
if (_menu_check_rebuild()) {
menu_rebuild();
}
}
$original_map = arg(NULL, $path);
$parts = array_slice($original_map, 0, MENU_MAX_PARTS);
$ancestors = menu_get_ancestors($parts);
$router_item = db_query_range('SELECT * FROM {menu_router} WHERE path IN (:ancestors) ORDER BY fit DESC', 0, 1, array(':ancestors' => $ancestors))->fetchAssoc();
if ($router_item) {
// Allow modules to alter the router item before it is translated and
// checked for access.
drupal_alter('menu_get_item', $router_item, $path, $original_map);
$map = _menu_translate($router_item, $original_map);
$router_item['original_map'] = $original_map;
if ($map === FALSE) {
$router_items[$path] = FALSE;
return FALSE;
}
if ($router_item['access']) {
$router_item['map'] = $map;
$router_item['page_arguments'] = array_merge(menu_unserialize($router_item['page_arguments'], $map), array_slice($map, $router_item['number_parts']));
$router_item['theme_arguments'] = array_merge(menu_unserialize($router_item['theme_arguments'], $map), array_slice($map, $router_item['number_parts']));
}
}
$router_items[$path] = $router_item;
}
return $router_items[$path];
}
/**
* Execute the page callback associated with the current path.
*
* @param $path
* The drupal path whose handler is to be be executed. If set to NULL, then
* the current path is used.
* @param $deliver
* (optional) A boolean to indicate whether the content should be sent to the
* browser using the appropriate delivery callback (TRUE) or whether to return
* the result to the caller (FALSE).
*/
function menu_execute_active_handler($path = NULL, $deliver = TRUE) {
// Check if site is offline.
$page_callback_result = _menu_site_is_offline() ? MENU_SITE_OFFLINE : MENU_SITE_ONLINE;
// Allow other modules to change the site status but not the path because that
// would not change the global variable. hook_url_inbound_alter() can be used
// to change the path. Code later will not use the $read_only_path variable.
$read_only_path = !empty($path) ? $path : $_GET['q'];
drupal_alter('menu_site_status', $page_callback_result, $read_only_path);
// Only continue if the site status is not set.
if ($page_callback_result == MENU_SITE_ONLINE) {
if ($router_item = menu_get_item($path)) {
if ($router_item['access']) {
if ($router_item['include_file']) {
require_once DRUPAL_ROOT . '/' . $router_item['include_file'];
}
$page_callback_result = call_user_func_array($router_item['page_callback'], $router_item['page_arguments']);
}
else {
$page_callback_result = MENU_ACCESS_DENIED;
}
}
else {
$page_callback_result = MENU_NOT_FOUND;
}
}
// Deliver the result of the page callback to the browser, or if requested,
// return it raw, so calling code can do more processing.
if ($deliver) {
$default_delivery_callback = (isset($router_item) && $router_item) ? $router_item['delivery_callback'] : NULL;
drupal_deliver_page($page_callback_result, $default_delivery_callback);
}
else {
return $page_callback_result;
}
}
/**
* Loads objects into the map as defined in the $item['load_functions'].
*
* @param $item
* A menu router or menu link item
* @param $map
* An array of path arguments; for example, array('node', '5').
*
* @return
* Returns TRUE for success, FALSE if an object cannot be loaded.
* Names of object loading functions are placed in $item['load_functions'].
* Loaded objects are placed in $map[]; keys are the same as keys in the
* $item['load_functions'] array.
* $item['access'] is set to FALSE if an object cannot be loaded.
*/
function _menu_load_objects(&$item, &$map) {
if ($load_functions = $item['load_functions']) {
// If someone calls this function twice, then unserialize will fail.
if (!is_array($load_functions)) {
$load_functions = unserialize($load_functions);
}
$path_map = $map;
foreach ($load_functions as $index => $function) {
if ($function) {
$value = isset($path_map[$index]) ? $path_map[$index] : '';
if (is_array($function)) {
// Set up arguments for the load function. These were pulled from
// 'load arguments' in the hook_menu() entry, but they need
// some processing. In this case the $function is the key to the
// load_function array, and the value is the list of arguments.
list($function, $args) = each($function);
$load_functions[$index] = $function;
// Some arguments are placeholders for dynamic items to process.
foreach ($args as $i => $arg) {
if ($arg === '%index') {
// Pass on argument index to the load function, so multiple
// occurrences of the same placeholder can be identified.
$args[$i] = $index;
}
if ($arg === '%map') {
// Pass on menu map by reference. The accepting function must
// also declare this as a reference if it wants to modify
// the map.
$args[$i] = &$map;
}
if (is_int($arg)) {
$args[$i] = isset($path_map[$arg]) ? $path_map[$arg] : '';
}
}
array_unshift($args, $value);
$return = call_user_func_array($function, $args);
}
else {
$return = $function($value);
}
// If callback returned an error or there is no callback, trigger 404.
if ($return === FALSE) {
$item['access'] = FALSE;
$map = FALSE;
return FALSE;
}
$map[$index] = $return;
}
}
$item['load_functions'] = $load_functions;
}
return TRUE;
}
/**
* Checks access to a menu item using the access callback.
*
* @param $item
* A menu router or menu link item
* @param $map
* An array of path arguments; for example, array('node', '5').
*
* @return
* $item['access'] becomes TRUE if the item is accessible, FALSE otherwise.
*/
function _menu_check_access(&$item, $map) {
$item['access'] = FALSE;
// Determine access callback, which will decide whether or not the current
// user has access to this path.
$callback = empty($item['access_callback']) ? 0 : trim($item['access_callback']);
// Check for a TRUE or FALSE value.
if (is_numeric($callback)) {
$item['access'] = (bool) $callback;
}
else {
$arguments = menu_unserialize($item['access_arguments'], $map);
// As call_user_func_array is quite slow and user_access is a very common
// callback, it is worth making a special case for it.
if ($callback == 'user_access') {
$item['access'] = (count($arguments) == 1) ? user_access($arguments[0]) : user_access($arguments[0], $arguments[1]);
}
elseif (function_exists($callback)) {
$item['access'] = call_user_func_array($callback, $arguments);
}
}
}
/**
* Localizes the router item title using t() or another callback.
*
* Translate the title and description to allow storage of English title
* strings in the database, yet display of them in the language required
* by the current user.
*
* @param $item
* A menu router item or a menu link item.
* @param $map
* The path as an array with objects already replaced. E.g., for path
* node/123 $map would be array('node', $node) where $node is the node
* object for node 123.
* @param $link_translate
* TRUE if we are translating a menu link item; FALSE if we are
* translating a menu router item.
*
* @return
* No return value.
* $item['title'] is localized according to $item['title_callback'].
* If an item's callback is check_plain(), $item['options']['html'] becomes
* TRUE.
* $item['description'] is translated using t().
* When doing link translation and the $item['options']['attributes']['title']
* (link title attribute) matches the description, it is translated as well.
*/
function _menu_item_localize(&$item, $map, $link_translate = FALSE) {
$callback = $item['title_callback'];
$item['localized_options'] = $item['options'];
// All 'class' attributes are assumed to be an array during rendering, but
// links stored in the database may use an old string value.
// @todo In order to remove this code we need to implement a database update
// including unserializing all existing link options and running this code
// on them, as well as adding validation to menu_link_save().
if (isset($item['options']['attributes']['class']) && is_string($item['options']['attributes']['class'])) {
$item['localized_options']['attributes']['class'] = explode(' ', $item['options']['attributes']['class']);
}
// If we are translating the title of a menu link, and its title is the same
// as the corresponding router item, then we can use the title information
// from the router. If it's customized, then we need to use the link title
// itself; can't localize.
// If we are translating a router item (tabs, page, breadcrumb), then we
// can always use the information from the router item.
if (!$link_translate || ($item['title'] == $item['link_title'])) {
// t() is a special case. Since it is used very close to all the time,
// we handle it directly instead of using indirect, slower methods.
if ($callback == 't') {
if (empty($item['title_arguments'])) {
$item['title'] = t($item['title']);
}
else {
$item['title'] = t($item['title'], menu_unserialize($item['title_arguments'], $map));
}
}
elseif ($callback && function_exists($callback)) {
if (empty($item['title_arguments'])) {
$item['title'] = $callback($item['title']);
}
else {
$item['title'] = call_user_func_array($callback, menu_unserialize($item['title_arguments'], $map));
}
// Avoid calling check_plain again on l() function.
if ($callback == 'check_plain') {
$item['localized_options']['html'] = TRUE;
}
}
}
elseif ($link_translate) {
$item['title'] = $item['link_title'];
}
// Translate description, see the motivation above.
if (!empty($item['description'])) {
$original_description = $item['description'];
$item['description'] = t($item['description']);
if ($link_translate && isset($item['options']['attributes']['title']) && $item['options']['attributes']['title'] == $original_description) {
$item['localized_options']['attributes']['title'] = $item['description'];
}
}
}
/**
* Handles dynamic path translation and menu access control.
*
* When a user arrives on a page such as node/5, this function determines
* what "5" corresponds to, by inspecting the page's menu path definition,
* node/%node. This will call node_load(5) to load the corresponding node
* object.
*
* It also works in reverse, to allow the display of tabs and menu items which
* contain these dynamic arguments, translating node/%node to node/5.
*
* Translation of menu item titles and descriptions are done here to
* allow for storage of English strings in the database, and translation
* to the language required to generate the current page.
*
* @param $router_item
* A menu router item
* @param $map
* An array of path arguments; for example, array('node', '5').
* @param $to_arg
* Execute $item['to_arg_functions'] or not. Use only if you want to render a
* path from the menu table, for example tabs.
*
* @return
* Returns the map with objects loaded as defined in the
* $item['load_functions']. $item['access'] becomes TRUE if the item is
* accessible, FALSE otherwise. $item['href'] is set according to the map.
* If an error occurs during calling the load_functions (like trying to load
* a non-existent node) then this function returns FALSE.
*/
function _menu_translate(&$router_item, $map, $to_arg = FALSE) {
if ($to_arg && !empty($router_item['to_arg_functions'])) {
// Fill in missing path elements, such as the current uid.
_menu_link_map_translate($map, $router_item['to_arg_functions']);
}
// The $path_map saves the pieces of the path as strings, while elements in
// $map may be replaced with loaded objects.
$path_map = $map;
if (!empty($router_item['load_functions']) && !_menu_load_objects($router_item, $map)) {
// An error occurred loading an object.
$router_item['access'] = FALSE;
return FALSE;
}
// Generate the link path for the page request or local tasks.
$link_map = explode('/', $router_item['path']);
if (isset($router_item['tab_root'])) {
$tab_root_map = explode('/', $router_item['tab_root']);
}
if (isset($router_item['tab_parent'])) {
$tab_parent_map = explode('/', $router_item['tab_parent']);
}
for ($i = 0; $i < $router_item['number_parts']; $i++) {
if ($link_map[$i] == '%') {
$link_map[$i] = $path_map[$i];
}
if (isset($tab_root_map[$i]) && $tab_root_map[$i] == '%') {
$tab_root_map[$i] = $path_map[$i];
}
if (isset($tab_parent_map[$i]) && $tab_parent_map[$i] == '%') {
$tab_parent_map[$i] = $path_map[$i];
}
}
$router_item['href'] = implode('/', $link_map);
$router_item['tab_root_href'] = implode('/', $tab_root_map);
$router_item['tab_parent_href'] = implode('/', $tab_parent_map);
$router_item['options'] = array();
_menu_check_access($router_item, $map);
// For performance, don't localize an item the user can't access.
if ($router_item['access']) {
_menu_item_localize($router_item, $map);
}
return $map;
}
/**
* Translates the path elements in the map using any to_arg helper function.
*
* @param $map
* An array of path arguments; for example, array('node', '5').
* @param $to_arg_functions
* An array of helper functions; for example, array(2 => 'menu_tail_to_arg').
*
* @see hook_menu()
*/
function _menu_link_map_translate(&$map, $to_arg_functions) {
$to_arg_functions = unserialize($to_arg_functions);
foreach ($to_arg_functions as $index => $function) {
// Translate place-holders into real values.
$arg = $function(!empty($map[$index]) ? $map[$index] : '', $map, $index);
if (!empty($map[$index]) || isset($arg)) {
$map[$index] = $arg;
}
else {
unset($map[$index]);
}
}
}
/**
* Returns a string containing the path relative to the current index.
*/
function menu_tail_to_arg($arg, $map, $index) {
return implode('/', array_slice($map, $index));
}
/**
* Loads the path as one string relative to the current index.
*
* To use this load function, you must specify the load arguments
* in the router item as:
* @code
* $item['load arguments'] = array('%map', '%index');
* @endcode
*
* @see search_menu().
*/
function menu_tail_load($arg, &$map, $index) {
$arg = implode('/', array_slice($map, $index));
$map = array_slice($map, 0, $index);
return $arg;
}
/**
* Provides menu link access control, translation, and argument handling.
*
* This function is similar to _menu_translate(), but it also does
* link-specific preparation (such as always calling to_arg() functions).
*
* @param $item
* A menu link.
* @param $translate
* (optional) Whether to try to translate a link containing dynamic path
* argument placeholders (%) based on the menu router item of the current
* path. Defaults to FALSE. Internally used for breadcrumbs.
*
* @return
* Returns the map of path arguments with objects loaded as defined in the
* $item['load_functions'].
* $item['access'] becomes TRUE if the item is accessible, FALSE otherwise.
* $item['href'] is generated from link_path, possibly by to_arg functions.
* $item['title'] is generated from link_title, and may be localized.
* $item['options'] is unserialized; it is also changed within the call here
* to $item['localized_options'] by _menu_item_localize().
*/
function _menu_link_translate(&$item, $translate = FALSE) {
if (!is_array($item['options'])) {
$item['options'] = unserialize($item['options']);
}
if ($item['external']) {
$item['access'] = 1;
$map = array();
$item['href'] = $item['link_path'];
$item['title'] = $item['link_title'];
$item['localized_options'] = $item['options'];
}
else {
// Complete the path of the menu link with elements from the current path,
// if it contains dynamic placeholders (%).
$map = explode('/', $item['link_path']);
if (strpos($item['link_path'], '%') !== FALSE) {
// Invoke registered to_arg callbacks.
if (!empty($item['to_arg_functions'])) {
_menu_link_map_translate($map, $item['to_arg_functions']);
}
// Or try to derive the path argument map from the current router item,
// if this $item's path is within the router item's path. This means
// that if we are on the current path 'foo/%/bar/%/baz', then
// menu_get_item() will have translated the menu router item for the
// current path, and we can take over the argument map for a link like
// 'foo/%/bar'. This inheritance is only valid for breadcrumb links.
// @see _menu_tree_check_access()
// @see menu_get_active_breadcrumb()
elseif ($translate && ($current_router_item = menu_get_item())) {
// If $translate is TRUE, then this link is in the active trail.
// Only translate paths within the current path.
if (strpos($current_router_item['path'], $item['link_path']) === 0) {
$count = count($map);
$map = array_slice($current_router_item['original_map'], 0, $count);
$item['original_map'] = $map;
if (isset($current_router_item['map'])) {
$item['map'] = array_slice($current_router_item['map'], 0, $count);
}
// Reset access to check it (for the first time).
unset($item['access']);
}
}
}
$item['href'] = implode('/', $map);
// Skip links containing untranslated arguments.
if (strpos($item['href'], '%') !== FALSE) {
$item['access'] = FALSE;
return FALSE;
}
// menu_tree_check_access() may set this ahead of time for links to nodes.
if (!isset($item['access'])) {
if (!empty($item['load_functions']) && !_menu_load_objects($item, $map)) {
// An error occurred loading an object.
$item['access'] = FALSE;
return FALSE;
}
_menu_check_access($item, $map);
}
// For performance, don't localize a link the user can't access.
if ($item['access']) {
_menu_item_localize($item, $map, TRUE);
}
}
// Allow other customizations - e.g. adding a page-specific query string to the
// options array. For performance reasons we only invoke this hook if the link
// has the 'alter' flag set in the options array.
if (!empty($item['options']['alter'])) {
drupal_alter('translated_menu_link', $item, $map);
}
return $map;
}
/**
* Gets a loaded object from a router item.
*
* menu_get_object() provides access to objects loaded by the current router
* item. For example, on the page node/%node, the router loads the %node object,
* and calling menu_get_object() will return that. Normally, it is necessary to
* specify the type of object referenced, however node is the default.
* The following example tests to see whether the node being displayed is of the
* "story" content type:
* @code
* $node = menu_get_object();
* $story = $node->type == 'story';
* @endcode
*
* @param $type
* Type of the object. These appear in hook_menu definitions as %type. Core
* provides aggregator_feed, aggregator_category, contact, filter_format,
* forum_term, menu, menu_link, node, taxonomy_vocabulary, user. See the
* relevant {$type}_load function for more on each. Defaults to node.
* @param $position
* The position of the object in the path, where the first path segment is 0.
* For node/%node, the position of %node is 1, but for comment/reply/%node,
* it's 2. Defaults to 1.
* @param $path
* See menu_get_item() for more on this. Defaults to the current path.
*/
function menu_get_object($type = 'node', $position = 1, $path = NULL) {
$router_item = menu_get_item($path);
if (isset($router_item['load_functions'][$position]) && !empty($router_item['map'][$position]) && $router_item['load_functions'][$position] == $type . '_load') {
return $router_item['map'][$position];
}
}
/**
* Renders a menu tree based on the current path.
*
* The tree is expanded based on the current path and dynamic paths are also
* changed according to the defined to_arg functions (for example the 'My
* account' link is changed from user/% to a link with the current user's uid).
*
* @param $menu_name
* The name of the menu.
*
* @return
* A structured array representing the specified menu on the current page, to
* be rendered by drupal_render().
*/
function menu_tree($menu_name) {
$menu_output = &drupal_static(__FUNCTION__, array());
if (!isset($menu_output[$menu_name])) {
$tree = menu_tree_page_data($menu_name);
$menu_output[$menu_name] = menu_tree_output($tree);
}
return $menu_output[$menu_name];
}
/**
* Returns an output structure for rendering a menu tree.
*
* The menu item's LI element is given one of the following classes:
* - expanded: The menu item is showing its submenu.
* - collapsed: The menu item has a submenu which is not shown.
* - leaf: The menu item has no submenu.
*
* @param $tree
* A data structure representing the tree as returned from menu_tree_data.
*
* @return
* A structured array to be rendered by drupal_render().
*/
function menu_tree_output($tree) {
$build = array();
$items = array();
// Pull out just the menu links we are going to render so that we
// get an accurate count for the first/last classes.
foreach ($tree as $data) {
if ($data['link']['access'] && !$data['link']['hidden']) {
$items[] = $data;
}
}
$router_item = menu_get_item();
$num_items = count($items);
foreach ($items as $i => $data) {
$class = array();
if ($i == 0) {
$class[] = 'first';
}
if ($i == $num_items - 1) {
$class[] = 'last';
}
// Set a class for the <li>-tag. Since $data['below'] may contain local
// tasks, only set 'expanded' class if the link also has children within
// the current menu.
if ($data['link']['has_children'] && $data['below']) {
$class[] = 'expanded';
}
elseif ($data['link']['has_children']) {
$class[] = 'collapsed';
}
else {
$class[] = 'leaf';
}
// Set a class if the link is in the active trail.
if ($data['link']['in_active_trail']) {
$class[] = 'active-trail';
$data['link']['localized_options']['attributes']['class'][] = 'active-trail';
}
// Normally, l() compares the href of every link with $_GET['q'] and sets
// the active class accordingly. But local tasks do not appear in menu
// trees, so if the current path is a local task, and this link is its
// tab root, then we have to set the class manually.
if ($data['link']['href'] == $router_item['tab_root_href'] && $data['link']['href'] != $_GET['q']) {
$data['link']['localized_options']['attributes']['class'][] = 'active';
}
// Allow menu-specific theme overrides.
$element['#theme'] = 'menu_link__' . strtr($data['link']['menu_name'], '-', '_');
$element['#attributes']['class'] = $class;
$element['#title'] = $data['link']['title'];
$element['#href'] = $data['link']['href'];
$element['#localized_options'] = !empty($data['link']['localized_options']) ? $data['link']['localized_options'] : array();
$element['#below'] = $data['below'] ? menu_tree_output($data['below']) : $data['below'];
$element['#original_link'] = $data['link'];
// Index using the link's unique mlid.
$build[$data['link']['mlid']] = $element;
}
if ($build) {
// Make sure drupal_render() does not re-order the links.
$build['#sorted'] = TRUE;
// Add the theme wrapper for outer markup.
// Allow menu-specific theme overrides.
$build['#theme_wrappers'][] = 'menu_tree__' . strtr($data['link']['menu_name'], '-', '_');
}
return $build;
}
/**
* Gets the data structure representing a named menu tree.
*
* Since this can be the full tree including hidden items, the data returned
* may be used for generating an an admin interface or a select.
*
* @param $menu_name
* The named menu links to return
* @param $link
* A fully loaded menu link, or NULL. If a link is supplied, only the
* path to root will be included in the returned tree - as if this link
* represented the current page in a visible menu.
* @param $max_depth
* Optional maximum depth of links to retrieve. Typically useful if only one
* or two levels of a sub tree are needed in conjunction with a non-NULL
* $link, in which case $max_depth should be greater than $link['depth'].
*
* @return
* An tree of menu links in an array, in the order they should be rendered.
*/
function menu_tree_all_data($menu_name, $link = NULL, $max_depth = NULL) {
$tree = &drupal_static(__FUNCTION__, array());
// Use $mlid as a flag for whether the data being loaded is for the whole tree.
$mlid = isset($link['mlid']) ? $link['mlid'] : 0;
// Generate a cache ID (cid) specific for this $menu_name, $link, $language, and depth.
$cid = 'links:' . $menu_name . ':all:' . $mlid . ':' . $GLOBALS['language']->language . ':' . (int) $max_depth;
if (!isset($tree[$cid])) {
// If the static variable doesn't have the data, check {cache_menu}.
$cache = cache_get($cid, 'cache_menu');
if ($cache && isset($cache->data)) {
// If the cache entry exists, it contains the parameters for
// menu_build_tree().
$tree_parameters = $cache->data;
}
// If the tree data was not in the cache, build $tree_parameters.
if (!isset($tree_parameters)) {
$tree_parameters = array(
'min_depth' => 1,
'max_depth' => $max_depth,
);
if ($mlid) {
// The tree is for a single item, so we need to match the values in its
// p columns and 0 (the top level) with the plid values of other links.
$parents = array(0);
for ($i = 1; $i < MENU_MAX_DEPTH; $i++) {
if (!empty($link["p$i"])) {
$parents[] = $link["p$i"];
}
}
$tree_parameters['expanded'] = $parents;
$tree_parameters['active_trail'] = $parents;
$tree_parameters['active_trail'][] = $mlid;
}
// Cache the tree building parameters using the page-specific cid.
cache_set($cid, $tree_parameters, 'cache_menu');
}
// Build the tree using the parameters; the resulting tree will be cached
// by _menu_build_tree()).
$tree[$cid] = menu_build_tree($menu_name, $tree_parameters);
}
return $tree[$cid];
}
/**
* Sets the path for determining the active trail of the specified menu tree.
*
* This path will also affect the breadcrumbs under some circumstances.
* Breadcrumbs are built using the preferred link returned by
* menu_link_get_preferred(). If the preferred link is inside one of the menus
* specified in calls to menu_tree_set_path(), the preferred link will be
* overridden by the corresponding path returned by menu_tree_get_path().
*
* Setting this path does not affect the main content; for that use
* menu_set_active_item() instead.
*
* @param $menu_name
* The name of the affected menu tree.
* @param $path
* The path to use when finding the active trail.
*/
function menu_tree_set_path($menu_name, $path = NULL) {
$paths = &drupal_static(__FUNCTION__);
if (isset($path)) {
$paths[$menu_name] = $path;
}
return isset($paths[$menu_name]) ? $paths[$menu_name] : NULL;
}
/**
* Gets the path for determining the active trail of the specified menu tree.
*
* @param $menu_name
* The menu name of the requested tree.
*
* @return
* A string containing the path. If no path has been specified with
* menu_tree_set_path(), NULL is returned.
*/
function menu_tree_get_path($menu_name) {
return menu_tree_set_path($menu_name);
}
/**
* Gets the data structure for a named menu tree, based on the current page.
*
* The tree order is maintained by storing each parent in an individual
* field, see http://drupal.org/node/141866 for more.
*
* @param $menu_name
* The named menu links to return.
* @param $max_depth
* (optional) The maximum depth of links to retrieve.
* @param $only_active_trail
* (optional) Whether to only return the links in the active trail (TRUE)
* instead of all links on every level of the menu link tree (FALSE). Defaults
* to FALSE. Internally used for breadcrumbs only.
*
* @return
* An array of menu links, in the order they should be rendered. The array
* is a list of associative arrays -- these have two keys, link and below.
* link is a menu item, ready for theming as a link. Below represents the
* submenu below the link if there is one, and it is a subtree that has the
* same structure described for the top-level array.
*/
function menu_tree_page_data($menu_name, $max_depth = NULL, $only_active_trail = FALSE) {
$tree = &drupal_static(__FUNCTION__, array());
// Check if the active trail has been overridden for this menu tree.
$active_path = menu_tree_get_path($menu_name);
// Load the menu item corresponding to the current page.
if ($item = menu_get_item($active_path)) {
if (isset($max_depth)) {
$max_depth = min($max_depth, MENU_MAX_DEPTH);
}
// Generate a cache ID (cid) specific for this page.
$cid = 'links:' . $menu_name . ':page:' . $item['href'] . ':' . $GLOBALS['language']->language . ':' . (int) $item['access'] . ':' . (int) $max_depth;
// If we are asked for the active trail only, and $menu_name has not been
// built and cached for this page yet, then this likely means that it
// won't be built anymore, as this function is invoked from
// template_process_page(). So in order to not build a giant menu tree
// that needs to be checked for access on all levels, we simply check
// whether we have the menu already in cache, or otherwise, build a minimum
// tree containing the breadcrumb/active trail only.
// @see menu_set_active_trail()
if (!isset($tree[$cid]) && $only_active_trail) {
$cid .= ':trail';
}
if (!isset($tree[$cid])) {
// If the static variable doesn't have the data, check {cache_menu}.
$cache = cache_get($cid, 'cache_menu');
if ($cache && isset($cache->data)) {
// If the cache entry exists, it contains the parameters for
// menu_build_tree().
$tree_parameters = $cache->data;
}
// If the tree data was not in the cache, build $tree_parameters.
if (!isset($tree_parameters)) {
$tree_parameters = array(
'min_depth' => 1,
'max_depth' => $max_depth,
);
// Parent mlids; used both as key and value to ensure uniqueness.
// We always want all the top-level links with plid == 0.
$active_trail = array(0 => 0);
// If the item for the current page is accessible, build the tree
// parameters accordingly.
if ($item['access']) {
// Find a menu link corresponding to the current path. If $active_path
// is NULL, let menu_link_get_preferred() determine the path.
if ($active_link = menu_link_get_preferred($active_path, $menu_name)) {
// The active link may only be taken into account to build the
// active trail, if it resides in the requested menu. Otherwise,
// we'd needlessly re-run _menu_build_tree() queries for every menu
// on every page.
if ($active_link['menu_name'] == $menu_name) {
// Use all the coordinates, except the last one because there
// can be no child beyond the last column.
for ($i = 1; $i < MENU_MAX_DEPTH; $i++) {
if ($active_link['p' . $i]) {
$active_trail[$active_link['p' . $i]] = $active_link['p' . $i];
}
}
// If we are asked to build links for the active trail only, skip
// the entire 'expanded' handling.
if ($only_active_trail) {
$tree_parameters['only_active_trail'] = TRUE;
}
}
}
$parents = $active_trail;
$expanded = variable_get('menu_expanded', array());
// Check whether the current menu has any links set to be expanded.
if (!$only_active_trail && in_array($menu_name, $expanded)) {
// Collect all the links set to be expanded, and then add all of
// their children to the list as well.
do {
$result = db_select('menu_links', NULL, array('fetch' => PDO::FETCH_ASSOC))
->fields('menu_links', array('mlid'))
->condition('menu_name', $menu_name)
->condition('expanded', 1)
->condition('has_children', 1)
->condition('plid', $parents, 'IN')
->condition('mlid', $parents, 'NOT IN')
->execute();
$num_rows = FALSE;
foreach ($result as $item) {
$parents[$item['mlid']] = $item['mlid'];
$num_rows = TRUE;
}
} while ($num_rows);
}
$tree_parameters['expanded'] = $parents;
$tree_parameters['active_trail'] = $active_trail;
}
// If access is denied, we only show top-level links in menus.
else {
$tree_parameters['expanded'] = $active_trail;
$tree_parameters['active_trail'] = $active_trail;
}
// Cache the tree building parameters using the page-specific cid.
cache_set($cid, $tree_parameters, 'cache_menu');
}
// Build the tree using the parameters; the resulting tree will be cached
// by _menu_build_tree().
$tree[$cid] = menu_build_tree($menu_name, $tree_parameters);
}
return $tree[$cid];
}
return array();
}
/**
* Builds a menu tree, translates links, and checks access.
*
* @param $menu_name
* The name of the menu.
* @param $parameters
* (optional) An associative array of build parameters. Possible keys:
* - expanded: An array of parent link ids to return only menu links that are
* children of one of the plids in this list. If empty, the whole menu tree
* is built, unless 'only_active_trail' is TRUE.
* - active_trail: An array of mlids, representing the coordinates of the
* currently active menu link.
* - only_active_trail: Whether to only return links that are in the active
* trail. This option is ignored, if 'expanded' is non-empty. Internally
* used for breadcrumbs.
* - min_depth: The minimum depth of menu links in the resulting tree.
* Defaults to 1, which is the default to build a whole tree for a menu
* (excluding menu container itself).
* - max_depth: The maximum depth of menu links in the resulting tree.
* - conditions: An associative array of custom database select query
* condition key/value pairs; see _menu_build_tree() for the actual query.
*
* @return
* A fully built menu tree.
*/
function menu_build_tree($menu_name, array $parameters = array()) {
// Build the menu tree.
$data = _menu_build_tree($menu_name, $parameters);
// Check access for the current user to each item in the tree.
menu_tree_check_access($data['tree'], $data['node_links']);
return $data['tree'];
}
/**
* Builds a menu tree.
*
* This function may be used build the data for a menu tree only, for example
* to further massage the data manually before further processing happens.
* menu_tree_check_access() needs to be invoked afterwards.
*
* @see menu_build_tree()
*/
function _menu_build_tree($menu_name, array $parameters = array()) {
// Static cache of already built menu trees.
$trees = &drupal_static(__FUNCTION__, array());
// Build the cache id; sort parents to prevent duplicate storage and remove
// default parameter values.
if (isset($parameters['expanded'])) {
sort($parameters['expanded']);
}
$tree_cid = 'links:' . $menu_name . ':tree-data:' . $GLOBALS['language']->language . ':' . hash('sha256', serialize($parameters));
// If we do not have this tree in the static cache, check {cache_menu}.
if (!isset($trees[$tree_cid])) {
$cache = cache_get($tree_cid, 'cache_menu');
if ($cache && isset($cache->data)) {
$trees[$tree_cid] = $cache->data;
}
}
if (!isset($trees[$tree_cid])) {
// Select the links from the table, and recursively build the tree. We
// LEFT JOIN since there is no match in {menu_router} for an external
// link.
$query = db_select('menu_links', 'ml', array('fetch' => PDO::FETCH_ASSOC));
$query->addTag('translatable');
$query->leftJoin('menu_router', 'm', 'm.path = ml.router_path');
$query->fields('ml');
$query->fields('m', array(
'load_functions',
'to_arg_functions',
'access_callback',
'access_arguments',
'page_callback',
'page_arguments',
'delivery_callback',
'tab_parent',
'tab_root',
'title',
'title_callback',
'title_arguments',
'theme_callback',
'theme_arguments',
'type',
'description',
));
for ($i = 1; $i <= MENU_MAX_DEPTH; $i++) {
$query->orderBy('p' . $i, 'ASC');
}
$query->condition('ml.menu_name', $menu_name);
if (!empty($parameters['expanded'])) {
$query->condition('ml.plid', $parameters['expanded'], 'IN');
}
elseif (!empty($parameters['only_active_trail'])) {
$query->condition('ml.mlid', $parameters['active_trail'], 'IN');
}
$min_depth = (isset($parameters['min_depth']) ? $parameters['min_depth'] : 1);
if ($min_depth != 1) {
$query->condition('ml.depth', $min_depth, '>=');
}
if (isset($parameters['max_depth'])) {
$query->condition('ml.depth', $parameters['max_depth'], '<=');
}
// Add custom query conditions, if any were passed.
if (isset($parameters['conditions'])) {
foreach ($parameters['conditions'] as $column => $value) {
$query->condition($column, $value);
}
}
// Build an ordered array of links using the query result object.
$links = array();
foreach ($query->execute() as $item) {
$links[] = $item;
}
$active_trail = (isset($parameters['active_trail']) ? $parameters['active_trail'] : array());
$data['tree'] = menu_tree_data($links, $active_trail, $min_depth);
$data['node_links'] = array();
menu_tree_collect_node_links($data['tree'], $data['node_links']);
// Cache the data, if it is not already in the cache.
cache_set($tree_cid, $data, 'cache_menu');
$trees[$tree_cid] = $data;
}
return $trees[$tree_cid];
}
/**
* Collects node links from a given menu tree recursively.
*
* @param $tree
* The menu tree you wish to collect node links from.
* @param $node_links
* An array in which to store the collected node links.
*/
function menu_tree_collect_node_links(&$tree, &$node_links) {
foreach ($tree as $key => $v) {
if ($tree[$key]['link']['router_path'] == 'node/%') {
$nid = substr($tree[$key]['link']['link_path'], 5);
if (is_numeric($nid)) {
$node_links[$nid][$tree[$key]['link']['mlid']] = &$tree[$key]['link'];
$tree[$key]['link']['access'] = FALSE;
}
}
if ($tree[$key]['below']) {
menu_tree_collect_node_links($tree[$key]['below'], $node_links);
}
}
}
/**
* Checks access and performs dynamic operations for each link in the tree.
*
* @param $tree
* The menu tree you wish to operate on.
* @param $node_links
* A collection of node link references generated from $tree by
* menu_tree_collect_node_links().
*/
function menu_tree_check_access(&$tree, $node_links = array()) {
if ($node_links) {
$nids = array_keys($node_links);
$select = db_select('node', 'n');
$select->addField('n', 'nid');
$select->condition('n.status', 1);
$select->condition('n.nid', $nids, 'IN');
$select->addTag('node_access');
$nids = $select->execute()->fetchCol();
foreach ($nids as $nid) {
foreach ($node_links[$nid] as $mlid => $link) {
$node_links[$nid][$mlid]['access'] = TRUE;
}
}
}
_menu_tree_check_access($tree);
}
/**
* Sorts the menu tree and recursively checks access for each item.
*/
function _menu_tree_check_access(&$tree) {
$new_tree = array();
foreach ($tree as $key => $v) {
$item = &$tree[$key]['link'];
_menu_link_translate($item);
if ($item['access'] || ($item['in_active_trail'] && strpos($item['href'], '%') !== FALSE)) {
if ($tree[$key]['below']) {
_menu_tree_check_access($tree[$key]['below']);
}
// The weights are made a uniform 5 digits by adding 50000 as an offset.
// After _menu_link_translate(), $item['title'] has the localized link title.
// Adding the mlid to the end of the index insures that it is unique.
$new_tree[(50000 + $item['weight']) . ' ' . $item['title'] . ' ' . $item['mlid']] = $tree[$key];
}
}
// Sort siblings in the tree based on the weights and localized titles.
ksort($new_tree);
$tree = $new_tree;
}
/**
* Sorts and returns the built data representing a menu tree.
*
* @param $links
* A flat array of menu links that are part of the menu. Each array element
* is an associative array of information about the menu link, containing the
* fields from the {menu_links} table, and optionally additional information
* from the {menu_router} table, if the menu item appears in both tables.
* This array must be ordered depth-first. See _menu_build_tree() for a sample
* query.
* @param $parents
* An array of the menu link ID values that are in the path from the current
* page to the root of the menu tree.
* @param $depth
* The minimum depth to include in the returned menu tree.
*
* @return
* An array of menu links in the form of a tree. Each item in the tree is an
* associative array containing:
* - link: The menu link item from $links, with additional element
* 'in_active_trail' (TRUE if the link ID was in $parents).
* - below: An array containing the sub-tree of this item, where each element
* is a tree item array with 'link' and 'below' elements. This array will be
* empty if the menu item has no items in its sub-tree having a depth
* greater than or equal to $depth.
*/
function menu_tree_data(array $links, array $parents = array(), $depth = 1) {
// Reverse the array so we can use the more efficient array_pop() function.
$links = array_reverse($links);
return _menu_tree_data($links, $parents, $depth);
}
/**
* Builds the data representing a menu tree.
*
* The function is a bit complex because the rendering of a link depends on
* the next menu link.
*/
function _menu_tree_data(&$links, $parents, $depth) {
$tree = array();
while ($item = array_pop($links)) {
// We need to determine if we're on the path to root so we can later build
// the correct active trail and breadcrumb.
$item['in_active_trail'] = in_array($item['mlid'], $parents);
// Add the current link to the tree.
$tree[$item['mlid']] = array(
'link' => $item,
'below' => array(),
);
// Look ahead to the next link, but leave it on the array so it's available
// to other recursive function calls if we return or build a sub-tree.
$next = end($links);
// Check whether the next link is the first in a new sub-tree.
if ($next && $next['depth'] > $depth) {
// Recursively call _menu_tree_data to build the sub-tree.
$tree[$item['mlid']]['below'] = _menu_tree_data($links, $parents, $next['depth']);
// Fetch next link after filling the sub-tree.
$next = end($links);
}
// Determine if we should exit the loop and return.
if (!$next || $next['depth'] < $depth) {
break;
}
}
return $tree;
}
/**
* Implements template_preprocess_HOOK() for theme_menu_tree().
*/
function template_preprocess_menu_tree(&$variables) {
$variables['tree'] = $variables['tree']['#children'];
}
/**
* Returns HTML for a wrapper for a menu sub-tree.
*
* @param $variables
* An associative array containing:
* - tree: An HTML string containing the tree's items.
*
* @see template_preprocess_menu_tree()
* @ingroup themeable
*/
function theme_menu_tree($variables) {
return '<ul class="menu">' . $variables['tree'] . '</ul>';
}
/**
* Returns HTML for a menu link and submenu.
*
* @param $variables
* An associative array containing:
* - element: Structured array data for a menu link.
*
* @ingroup themeable
*/
function theme_menu_link(array $variables) {
$element = $variables['element'];
$sub_menu = '';
if ($element['#below']) {
$sub_menu = drupal_render($element['#below']);
}
$output = l($element['#title'], $element['#href'], $element['#localized_options']);
return '<li' . drupal_attributes($element['#attributes']) . '>' . $output . $sub_menu . "</li>\n";
}
/**
* Returns HTML for a single local task link.
*
* @param $variables
* An associative array containing:
* - element: A render element containing:
* - #link: A menu link array with 'title', 'href', and 'localized_options'
* keys.
* - #active: A boolean indicating whether the local task is active.
*
* @ingroup themeable
*/
function theme_menu_local_task($variables) {
$link = $variables['element']['#link'];
$link_text = $link['title'];
if (!empty($variables['element']['#active'])) {
// Add text to indicate active tab for non-visual users.
$active = '<span class="element-invisible">' . t('(active tab)') . '</span>';
// If the link does not contain HTML already, check_plain() it now.
// After we set 'html'=TRUE the link will not be sanitized by l().
if (empty($link['localized_options']['html'])) {
$link['title'] = check_plain($link['title']);
}
$link['localized_options']['html'] = TRUE;
$link_text = t('!local-task-title!active', array('!local-task-title' => $link['title'], '!active' => $active));
}
return '<li' . (!empty($variables['element']['#active']) ? ' class="active"' : '') . '>' . l($link_text, $link['href'], $link['localized_options']) . "</li>\n";
}
/**
* Returns HTML for a single local action link.
*
* @param $variables
* An associative array containing:
* - element: A render element containing:
* - #link: A menu link array with 'title', 'href', and 'localized_options'
* keys.
*
* @ingroup themeable
*/
function theme_menu_local_action($variables) {
$link = $variables['element']['#link'];
$output = '<li>';
if (isset($link['href'])) {
$output .= l($link['title'], $link['href'], isset($link['localized_options']) ? $link['localized_options'] : array());
}
elseif (!empty($link['localized_options']['html'])) {
$output .= $link['title'];
}
else {
$output .= check_plain($link['title']);
}
$output .= "</li>\n";
return $output;
}
/**
* Generates elements for the $arg array in the help hook.
*/
function drupal_help_arg($arg = array()) {
// Note - the number of empty elements should be > MENU_MAX_PARTS.
return $arg + array('', '', '', '', '', '', '', '', '', '', '', '');
}
/**
* Returns the help associated with the active menu item.
*/
function menu_get_active_help() {
$output = '';
$router_path = menu_tab_root_path();
// We will always have a path unless we are on a 403 or 404.
if (!$router_path) {
return '';
}
$arg = drupal_help_arg(arg(NULL));
foreach (module_implements('help') as $module) {
$function = $module . '_help';
// Lookup help for this path.
if ($help = $function($router_path, $arg)) {
$output .= $help . "\n";
}
}
return $output;
}
/**
* Gets the custom theme for the current page, if there is one.
*
* @param $initialize
* This parameter should only be used internally; it is set to TRUE in order
* to force the custom theme to be initialized for the current page request.
*
* @return
* The machine-readable name of the custom theme, if there is one.
*
* @see menu_set_custom_theme()
*/
function menu_get_custom_theme($initialize = FALSE) {
$custom_theme = &drupal_static(__FUNCTION__);
// Skip this if the site is offline or being installed or updated, since the
// menu system may not be correctly initialized then.
if ($initialize && !_menu_site_is_offline(TRUE) && (!defined('MAINTENANCE_MODE') || (MAINTENANCE_MODE != 'update' && MAINTENANCE_MODE != 'install'))) {
// First allow modules to dynamically set a custom theme for the current
// page. Since we can only have one, the last module to return a valid
// theme takes precedence.
$custom_themes = array_filter(module_invoke_all('custom_theme'), 'drupal_theme_access');
if (!empty($custom_themes)) {
$custom_theme = array_pop($custom_themes);
}
// If there is a theme callback function for the current page, execute it.
// If this returns a valid theme, it will override any theme that was set
// by a hook_custom_theme() implementation above.
$router_item = menu_get_item();
if (!empty($router_item['access']) && !empty($router_item['theme_callback']) && function_exists($router_item['theme_callback'])) {
$theme_name = call_user_func_array($router_item['theme_callback'], $router_item['theme_arguments']);
if (drupal_theme_access($theme_name)) {
$custom_theme = $theme_name;
}
}
}
return $custom_theme;
}
/**
* Sets a custom theme for the current page, if there is one.
*/
function menu_set_custom_theme() {
menu_get_custom_theme(TRUE);
}
/**
* Build a list of named menus.
*/
function menu_get_names() {
$names = &drupal_static(__FUNCTION__);
if (empty($names)) {
$names = db_select('menu_links')
->distinct()
->fields('menu_links', array('menu_name'))
->orderBy('menu_name')
->execute()->fetchCol();
}
return $names;
}
/**
* Returns an array containing the names of system-defined (default) menus.
*/
function menu_list_system_menus() {
return array(
'navigation' => 'Navigation',
'management' => 'Management',
'user-menu' => 'User menu',
'main-menu' => 'Main menu',
);
}
/**
* Returns an array of links to be rendered as the Main menu.
*/
function menu_main_menu() {
return menu_navigation_links(variable_get('menu_main_links_source', 'main-menu'));
}
/**
* Returns an array of links to be rendered as the Secondary links.
*/
function menu_secondary_menu() {
// If the secondary menu source is set as the primary menu, we display the
// second level of the primary menu.
if (variable_get('menu_secondary_links_source', 'user-menu') == variable_get('menu_main_links_source', 'main-menu')) {
return menu_navigation_links(variable_get('menu_main_links_source', 'main-menu'), 1);
}
else {
return menu_navigation_links(variable_get('menu_secondary_links_source', 'user-menu'), 0);
}
}
/**
* Returns an array of links for a navigation menu.
*
* @param $menu_name
* The name of the menu.
* @param $level
* Optional, the depth of the menu to be returned.
*
* @return
* An array of links of the specified menu and level.
*/
function menu_navigation_links($menu_name, $level = 0) {
// Don't even bother querying the menu table if no menu is specified.
if (empty($menu_name)) {
return array();
}
// Get the menu hierarchy for the current page.
$tree = menu_tree_page_data($menu_name, $level + 1);
// Go down the active trail until the right level is reached.
while ($level-- > 0 && $tree) {
// Loop through the current level's items until we find one that is in trail.
while ($item = array_shift($tree)) {
if ($item['link']['in_active_trail']) {
// If the item is in the active trail, we continue in the subtree.
$tree = empty($item['below']) ? array() : $item['below'];
break;
}
}
}
// Create a single level of links.
$router_item = menu_get_item();
$links = array();
foreach ($tree as $item) {
if (!$item['link']['hidden']) {
$class = '';
$l = $item['link']['localized_options'];
$l['href'] = $item['link']['href'];
$l['title'] = $item['link']['title'];
if ($item['link']['in_active_trail']) {
$class = ' active-trail';
$l['attributes']['class'][] = 'active-trail';
}
// Normally, l() compares the href of every link with $_GET['q'] and sets
// the active class accordingly. But local tasks do not appear in menu
// trees, so if the current path is a local task, and this link is its
// tab root, then we have to set the class manually.
if ($item['link']['href'] == $router_item['tab_root_href'] && $item['link']['href'] != $_GET['q']) {
$l['attributes']['class'][] = 'active';
}
// Keyed with the unique mlid to generate classes in theme_links().
$links['menu-' . $item['link']['mlid'] . $class] = $l;
}
}
return $links;
}
/**
* Collects the local tasks (tabs), action links, and the root path.
*
* @param $level
* The level of tasks you ask for. Primary tasks are 0, secondary are 1.
*
* @return
* An array containing
* - tabs: Local tasks for the requested level:
* - count: The number of local tasks.
* - output: The themed output of local tasks.
* - actions: Action links for the requested level:
* - count: The number of action links.
* - output: The themed output of action links.
* - root_path: The router path for the current page. If the current page is
* a default local task, then this corresponds to the parent tab.
*/
function menu_local_tasks($level = 0) {
$data = &drupal_static(__FUNCTION__);
$root_path = &drupal_static(__FUNCTION__ . ':root_path', '');
$empty = array(
'tabs' => array('count' => 0, 'output' => array()),
'actions' => array('count' => 0, 'output' => array()),
'root_path' => &$root_path,
);
if (!isset($data)) {
$data = array();
// Set defaults in case there are no actions or tabs.
$actions = $empty['actions'];
$tabs = array();
$router_item = menu_get_item();
// If this router item points to its parent, start from the parents to
// compute tabs and actions.
if ($router_item && ($router_item['type'] & MENU_LINKS_TO_PARENT)) {
$router_item = menu_get_item($router_item['tab_parent_href']);
}
// If we failed to fetch a router item or the current user doesn't have
// access to it, don't bother computing the tabs.
if (!$router_item || !$router_item['access']) {
return $empty;
}
// Get all tabs (also known as local tasks) and the root page.
$cid = 'local_tasks:' . $router_item['tab_root'];
if ($cache = cache_get($cid, 'cache_menu')) {
$result = $cache->data;
}
else {
$result = db_select('menu_router', NULL, array('fetch' => PDO::FETCH_ASSOC))
->fields('menu_router')
->condition('tab_root', $router_item['tab_root'])
->condition('context', MENU_CONTEXT_INLINE, '<>')
->orderBy('weight')
->orderBy('title')
->execute()
->fetchAll();
cache_set($cid, $result, 'cache_menu');
}
$map = $router_item['original_map'];
$children = array();
$tasks = array();
$root_path = $router_item['path'];
foreach ($result as $item) {
_menu_translate($item, $map, TRUE);
if ($item['tab_parent']) {
// All tabs, but not the root page.
$children[$item['tab_parent']][$item['path']] = $item;
}
// Store the translated item for later use.
$tasks[$item['path']] = $item;
}
// Find all tabs below the current path.
$path = $router_item['path'];
// Tab parenting may skip levels, so the number of parts in the path may not
// equal the depth. Thus we use the $depth counter (offset by 1000 for ksort).
$depth = 1001;
$actions['count'] = 0;
$actions['output'] = array();
while (isset($children[$path])) {
$tabs_current = array();
$actions_current = array();
$next_path = '';
$tab_count = 0;
$action_count = 0;
foreach ($children[$path] as $item) {
// Local tasks can be normal items too, so bitmask with
// MENU_IS_LOCAL_TASK before checking.
if (!($item['type'] & MENU_IS_LOCAL_TASK)) {
// This item is not a tab, skip it.
continue;
}
if ($item['access']) {
$link = $item;
// The default task is always active. As tabs can be normal items
// too, so bitmask with MENU_LINKS_TO_PARENT before checking.
if (($item['type'] & MENU_LINKS_TO_PARENT) == MENU_LINKS_TO_PARENT) {
// Find the first parent which is not a default local task or action.
for ($p = $item['tab_parent']; ($tasks[$p]['type'] & MENU_LINKS_TO_PARENT) == MENU_LINKS_TO_PARENT; $p = $tasks[$p]['tab_parent']);
// Use the path of the parent instead.
$link['href'] = $tasks[$p]['href'];
// Mark the link as active, if the current path happens to be the
// path of the default local task itself (i.e., instead of its
// tab_parent_href or tab_root_href). Normally, links for default
// local tasks link to their parent, but the path of default local
// tasks can still be accessed directly, in which case this link
// would not be marked as active, since l() only compares the href
// with $_GET['q'].
if ($link['href'] != $_GET['q']) {
$link['localized_options']['attributes']['class'][] = 'active';
}
$tabs_current[] = array(
'#theme' => 'menu_local_task',
'#link' => $link,
'#active' => TRUE,
);
$next_path = $item['path'];
$tab_count++;
}
else {
// Actions can be normal items too, so bitmask with
// MENU_IS_LOCAL_ACTION before checking.
if (($item['type'] & MENU_IS_LOCAL_ACTION) == MENU_IS_LOCAL_ACTION) {
// The item is an action, display it as such.
$actions_current[] = array(
'#theme' => 'menu_local_action',
'#link' => $link,
);
$action_count++;
}
else {
// Otherwise, it's a normal tab.
$tabs_current[] = array(
'#theme' => 'menu_local_task',
'#link' => $link,
);
$tab_count++;
}
}
}
}
$path = $next_path;
$tabs[$depth]['count'] = $tab_count;
$tabs[$depth]['output'] = $tabs_current;
$actions['count'] += $action_count;
$actions['output'] = array_merge($actions['output'], $actions_current);
$depth++;
}
$data['actions'] = $actions;
// Find all tabs at the same level or above the current one.
$parent = $router_item['tab_parent'];
$path = $router_item['path'];
$current = $router_item;
$depth = 1000;
while (isset($children[$parent])) {
$tabs_current = array();
$next_path = '';
$next_parent = '';
$count = 0;
foreach ($children[$parent] as $item) {
// Skip local actions.
if ($item['type'] & MENU_IS_LOCAL_ACTION) {
continue;
}
if ($item['access']) {
$count++;
$link = $item;
// Local tasks can be normal items too, so bitmask with
// MENU_LINKS_TO_PARENT before checking.
if (($item['type'] & MENU_LINKS_TO_PARENT) == MENU_LINKS_TO_PARENT) {
// Find the first parent which is not a default local task.
for ($p = $item['tab_parent']; ($tasks[$p]['type'] & MENU_LINKS_TO_PARENT) == MENU_LINKS_TO_PARENT; $p = $tasks[$p]['tab_parent']);
// Use the path of the parent instead.
$link['href'] = $tasks[$p]['href'];
if ($item['path'] == $router_item['path']) {
$root_path = $tasks[$p]['path'];
}
}
// We check for the active tab.
if ($item['path'] == $path) {
// Mark the link as active, if the current path is a (second-level)
// local task of a default local task. Since this default local task
// links to its parent, l() will not mark it as active, as it only
// compares the link's href to $_GET['q'].
if ($link['href'] != $_GET['q']) {
$link['localized_options']['attributes']['class'][] = 'active';
}
$tabs_current[] = array(
'#theme' => 'menu_local_task',
'#link' => $link,
'#active' => TRUE,
);
$next_path = $item['tab_parent'];
if (isset($tasks[$next_path])) {
$next_parent = $tasks[$next_path]['tab_parent'];
}
}
else {
$tabs_current[] = array(
'#theme' => 'menu_local_task',
'#link' => $link,
);
}
}
}
$path = $next_path;
$parent = $next_parent;
$tabs[$depth]['count'] = $count;
$tabs[$depth]['output'] = $tabs_current;
$depth--;
}
// Sort by depth.
ksort($tabs);
// Remove the depth, we are interested only in their relative placement.
$tabs = array_values($tabs);
$data['tabs'] = $tabs;
// Allow modules to alter local tasks or dynamically append further tasks.
drupal_alter('menu_local_tasks', $data, $router_item, $root_path);
}
if (isset($data['tabs'][$level])) {
return array(
'tabs' => $data['tabs'][$level],
'actions' => $data['actions'],
'root_path' => $root_path,
);
}
// @todo If there are no tabs, then there still can be actions; for example,
// when added via hook_menu_local_tasks_alter().
elseif (!empty($data['actions']['output'])) {
return array('actions' => $data['actions']) + $empty;
}
return $empty;
}
/**
* Retrieves contextual links for a path based on registered local tasks.
*
* This leverages the menu system to retrieve the first layer of registered
* local tasks for a given system path. All local tasks of the tab type
* MENU_CONTEXT_INLINE are taken into account.
*
* For example, when considering the following registered local tasks:
* - node/%node/view (default local task) with no 'context' defined
* - node/%node/edit with context: MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE
* - node/%node/revisions with context: MENU_CONTEXT_PAGE
* - node/%node/report-as-spam with context: MENU_CONTEXT_INLINE
*
* If the path "node/123" is passed to this function, then it will return the
* links for 'edit' and 'report-as-spam'.
*
* @param $module
* The name of the implementing module. This is used to prefix the key for
* each contextual link, which is transformed into a CSS class during
* rendering by theme_links(). For example, if $module is 'block' and the
* retrieved local task path argument is 'edit', then the resulting CSS class
* will be 'block-edit'.
* @param $parent_path
* The static menu router path of the object to retrieve local tasks for, for
* example 'node' or 'admin/structure/block/manage'.
* @param $args
* A list of dynamic path arguments to append to $parent_path to form the
* fully-qualified menu router path; for example, array(123) for a certain
* node or array('system', 'navigation') for a certain block.
*
* @return
* A list of menu router items that are local tasks for the passed-in path.
*
* @see contextual_links_preprocess()
* @see hook_menu()
*/
function menu_contextual_links($module, $parent_path, $args) {
static $path_empty = array();
$links = array();
// Performance: In case a previous invocation for the same parent path did not
// return any links, we immediately return here.
if (isset($path_empty[$parent_path]) && strpos($parent_path, '%') !== FALSE) {
return $links;
}
// Construct the item-specific parent path.
$path = $parent_path . '/' . implode('/', $args);
// Get the router item for the given parent link path.
$router_item = menu_get_item($path);
if (!$router_item || !$router_item['access']) {
$path_empty[$parent_path] = TRUE;
return $links;
}
$data = &drupal_static(__FUNCTION__, array());
$root_path = $router_item['path'];
// Performance: For a single, normalized path (such as 'node/%') we only query
// available tasks once per request.
if (!isset($data[$root_path])) {
// Get all contextual links that are direct children of the router item and
// not of the tab type 'view'.
$data[$root_path] = db_select('menu_router', 'm')
->fields('m')
->condition('tab_parent', $router_item['tab_root'])
->condition('context', MENU_CONTEXT_NONE, '<>')
->condition('context', MENU_CONTEXT_PAGE, '<>')
->orderBy('weight')
->orderBy('title')
->execute()
->fetchAllAssoc('path', PDO::FETCH_ASSOC);
}
$parent_length = drupal_strlen($root_path) + 1;
$map = $router_item['original_map'];
foreach ($data[$root_path] as $item) {
// Extract the actual "task" string from the path argument.
$key = drupal_substr($item['path'], $parent_length);
// Denormalize and translate the contextual link.
_menu_translate($item, $map, TRUE);
if (!$item['access']) {
continue;
}
// All contextual links are keyed by the actual "task" path argument,
// prefixed with the name of the implementing module.
$links[$module . '-' . $key] = $item;
}
// Allow modules to alter contextual links.
drupal_alter('menu_contextual_links', $links, $router_item, $root_path);
// Performance: If the current user does not have access to any links for this
// router path and no other module added further links, we assign FALSE here
// to skip the entire process the next time the same router path is requested.
if (empty($links)) {
$path_empty[$parent_path] = TRUE;
}
return $links;
}
/**
* Returns the rendered local tasks at the top level.
*/
function menu_primary_local_tasks() {
$links = menu_local_tasks(0);
// Do not display single tabs.
return ($links['tabs']['count'] > 1 ? $links['tabs']['output'] : '');
}
/**
* Returns the rendered local tasks at the second level.
*/
function menu_secondary_local_tasks() {
$links = menu_local_tasks(1);
// Do not display single tabs.
return ($links['tabs']['count'] > 1 ? $links['tabs']['output'] : '');
}
/**
* Returns the rendered local actions at the current level.
*/
function menu_local_actions() {
$links = menu_local_tasks();
return $links['actions']['output'];
}
/**
* Returns the router path, or the path for a default local task's parent.
*/
function menu_tab_root_path() {
$links = menu_local_tasks();
return $links['root_path'];
}
/**
* Returns a renderable element for the primary and secondary tabs.
*/
function menu_local_tabs() {
return array(
'#theme' => 'menu_local_tasks',
'#primary' => menu_primary_local_tasks(),
'#secondary' => menu_secondary_local_tasks(),
);
}
/**
* Returns HTML for primary and secondary local tasks.
*
* @param $variables
* An associative array containing:
* - primary: (optional) An array of local tasks (tabs).
* - secondary: (optional) An array of local tasks (tabs).
*
* @ingroup themeable
* @see menu_local_tasks()
*/
function theme_menu_local_tasks(&$variables) {
$output = '';
if (!empty($variables['primary'])) {
$variables['primary']['#prefix'] = '<h2 class="element-invisible">' . t('Primary tabs') . '</h2>';
$variables['primary']['#prefix'] .= '<ul class="tabs primary">';
$variables['primary']['#suffix'] = '</ul>';
$output .= drupal_render($variables['primary']);
}
if (!empty($variables['secondary'])) {
$variables['secondary']['#prefix'] = '<h2 class="element-invisible">' . t('Secondary tabs') . '</h2>';
$variables['secondary']['#prefix'] .= '<ul class="tabs secondary">';
$variables['secondary']['#suffix'] = '</ul>';
$output .= drupal_render($variables['secondary']);
}
return $output;
}
/**
* Sets (or gets) the active menu for the current page.
*
* The active menu for the page determines the active trail.
*
* @return
* An array of menu machine names, in order of preference. The
* 'menu_default_active_menus' variable may be used to assert a menu order
* different from the order of creation, or to prevent a particular menu from
* being used at all in the active trail.
* E.g., $conf['menu_default_active_menus'] = array('navigation', 'main-menu')
*/
function menu_set_active_menu_names($menu_names = NULL) {
$active = &drupal_static(__FUNCTION__);
if (isset($menu_names) && is_array($menu_names)) {
$active = $menu_names;
}
elseif (!isset($active)) {
$active = variable_get('menu_default_active_menus', array_keys(menu_list_system_menus()));
}
return $active;
}
/**
* Gets the active menu for the current page.
*/
function menu_get_active_menu_names() {
return menu_set_active_menu_names();
}
/**
* Sets the active path, which determines which page is loaded.
*
* Note that this may not have the desired effect unless invoked very early
* in the page load, such as during hook_boot(), or unless you call
* menu_execute_active_handler() to generate your page output.
*
* @param $path
* A Drupal path - not a path alias.
*/
function menu_set_active_item($path) {
$_GET['q'] = $path;
// Since the active item has changed, the active menu trail may also be out
// of date.
drupal_static_reset('menu_set_active_trail');
}
/**
* Sets the active trail (path to the menu tree root) of the current page.
*
* Any trail set by this function will only be used for functionality that calls
* menu_get_active_trail(). Drupal core only uses trails set here for
* breadcrumbs and the page title and not for menu trees or page content.
* Additionally, breadcrumbs set by drupal_set_breadcrumb() will override any
* trail set here.
*
* To affect the trail used by menu trees, use menu_tree_set_path(). To affect
* the page content, use menu_set_active_item() instead.
*
* @param $new_trail
* Menu trail to set; the value is saved in a static variable and can be
* retrieved by menu_get_active_trail(). The format of this array should be
* the same as the return value of menu_get_active_trail().
*
* @return
* The active trail. See menu_get_active_trail() for details.
*/
function menu_set_active_trail($new_trail = NULL) {
$trail = &drupal_static(__FUNCTION__);
if (isset($new_trail)) {
$trail = $new_trail;
}
elseif (!isset($trail)) {
$trail = array();
$trail[] = array(
'title' => t('Home'),
'href' => '<front>',
'link_path' => '',
'localized_options' => array(),
'type' => 0,
);
// Try to retrieve a menu link corresponding to the current path. If more
// than one exists, the link from the most preferred menu is returned.
$preferred_link = menu_link_get_preferred();
$current_item = menu_get_item();
// There is a link for the current path.
if ($preferred_link) {
// Pass TRUE for $only_active_trail to make menu_tree_page_data() build
// a stripped down menu tree containing the active trail only, in case
// the given menu has not been built in this request yet.
$tree = menu_tree_page_data($preferred_link['menu_name'], NULL, TRUE);
list($key, $curr) = each($tree);
}
// There is no link for the current path.
else {
$preferred_link = $current_item;
$curr = FALSE;
}
while ($curr) {
$link = $curr['link'];
if ($link['in_active_trail']) {
// Add the link to the trail, unless it links to its parent.
if (!($link['type'] & MENU_LINKS_TO_PARENT)) {
// The menu tree for the active trail may contain additional links
// that have not been translated yet, since they contain dynamic
// argument placeholders (%). Such links are not contained in regular
// menu trees, and have only been loaded for the additional
// translation that happens here, so as to be able to display them in
// the breadcumb for the current page.
// @see _menu_tree_check_access()
// @see _menu_link_translate()
if (strpos($link['href'], '%') !== FALSE) {
_menu_link_translate($link, TRUE);
}
if ($link['access']) {
$trail[] = $link;
}
}
$tree = $curr['below'] ? $curr['below'] : array();
}
list($key, $curr) = each($tree);
}
// Make sure the current page is in the trail to build the page title, by
// appending either the preferred link or the menu router item for the
// current page. Exclude it if we are on the front page.
$last = end($trail);
if ($preferred_link && $last['href'] != $preferred_link['href'] && !drupal_is_front_page()) {
$trail[] = $preferred_link;
}
}
return $trail;
}
/**
* Looks up the preferred menu link for a given system path.
*
* @param $path
* The path; for example, 'node/5'. The function will find the corresponding
* menu link ('node/5' if it exists, or fallback to 'node/%').
* @param $selected_menu
* The name of a menu used to restrict the search for a preferred menu link.
* If not specified, all the menus returned by menu_get_active_menu_names()
* will be used.
*
* @return
* A fully translated menu link, or FALSE if no matching menu link was
* found. The most specific menu link ('node/5' preferred over 'node/%') in
* the most preferred menu (as defined by menu_get_active_menu_names()) is
* returned.
*/
function menu_link_get_preferred($path = NULL, $selected_menu = NULL) {
$preferred_links = &drupal_static(__FUNCTION__);
if (!isset($path)) {
$path = $_GET['q'];
}
if (empty($selected_menu)) {
// Use an illegal menu name as the key for the preferred menu link.
$selected_menu = MENU_PREFERRED_LINK;
}
if (!isset($preferred_links[$path])) {
// Look for the correct menu link by building a list of candidate paths,
// which are ordered by priority (translated hrefs are preferred over
// untranslated paths). Afterwards, the most relevant path is picked from
// the menus, ordered by menu preference.
$item = menu_get_item($path);
$path_candidates = array();
// 1. The current item href.
$path_candidates[$item['href']] = $item['href'];
// 2. The tab root href of the current item (if any).
if ($item['tab_parent'] && ($tab_root = menu_get_item($item['tab_root_href']))) {
$path_candidates[$tab_root['href']] = $tab_root['href'];
}
// 3. The current item path (with wildcards).
$path_candidates[$item['path']] = $item['path'];
// 4. The tab root path of the current item (if any).
if (!empty($tab_root)) {
$path_candidates[$tab_root['path']] = $tab_root['path'];
}
// Retrieve a list of menu names, ordered by preference.
$menu_names = menu_get_active_menu_names();
// Put the selected menu at the front of the list.
array_unshift($menu_names, $selected_menu);
$query = db_select('menu_links', 'ml', array('fetch' => PDO::FETCH_ASSOC));
$query->leftJoin('menu_router', 'm', 'm.path = ml.router_path');
$query->fields('ml');
// Weight must be taken from {menu_links}, not {menu_router}.
$query->addField('ml', 'weight', 'link_weight');
$query->fields('m');
$query->condition('ml.link_path', $path_candidates, 'IN');
$query->addTag('preferred_menu_links');
// Sort candidates by link path and menu name.
$candidates = array();
foreach ($query->execute() as $candidate) {
$candidate['weight'] = $candidate['link_weight'];
$candidates[$candidate['link_path']][$candidate['menu_name']] = $candidate;
// Add any menus not already in the menu name search list.
if (!in_array($candidate['menu_name'], $menu_names)) {
$menu_names[] = $candidate['menu_name'];
}
}
// Store the most specific link for each menu. Also save the most specific
// link of the most preferred menu in $preferred_link.
foreach ($path_candidates as $link_path) {
if (isset($candidates[$link_path])) {
foreach ($menu_names as $menu_name) {
if (empty($preferred_links[$path][$menu_name]) && isset($candidates[$link_path][$menu_name])) {
$candidate_item = $candidates[$link_path][$menu_name];
$map = explode('/', $path);
_menu_translate($candidate_item, $map);
if ($candidate_item['access']) {
$preferred_links[$path][$menu_name] = $candidate_item;
if (empty($preferred_links[$path][MENU_PREFERRED_LINK])) {
// Store the most specific link.
$preferred_links[$path][MENU_PREFERRED_LINK] = $candidate_item;
}
}
}
}
}
}
}
return isset($preferred_links[$path][$selected_menu]) ? $preferred_links[$path][$selected_menu] : FALSE;
}
/**
* Gets the active trail (path to root menu root) of the current page.
*
* If a trail is supplied to menu_set_active_trail(), that value is returned. If
* a trail is not supplied to menu_set_active_trail(), the path to the current
* page is calculated and returned. The calculated trail is also saved as a
* static value for use by subsequent calls to menu_get_active_trail().
*
* @return
* Path to menu root of the current page, as an array of menu link items,
* starting with the site's home page. Each link item is an associative array
* with the following components:
* - title: Title of the item.
* - href: Drupal path of the item.
* - localized_options: Options for passing into the l() function.
* - type: A menu type constant, such as MENU_DEFAULT_LOCAL_TASK, or 0 to
* indicate it's not really in the menu (used for the home page item).
*/
function menu_get_active_trail() {
return menu_set_active_trail();
}
/**
* Gets the breadcrumb for the current page, as determined by the active trail.
*
* @see menu_set_active_trail()
*/
function menu_get_active_breadcrumb() {
$breadcrumb = array();
// No breadcrumb for the front page.
if (drupal_is_front_page()) {
return $breadcrumb;
}
$item = menu_get_item();
if (!empty($item['access'])) {
$active_trail = menu_get_active_trail();
// Allow modules to alter the breadcrumb, if possible, as that is much
// faster than rebuilding an entirely new active trail.
drupal_alter('menu_breadcrumb', $active_trail, $item);
// Don't show a link to the current page in the breadcrumb trail.
$end = end($active_trail);
if ($item['href'] == $end['href']) {
array_pop($active_trail);
}
// Remove the tab root (parent) if the current path links to its parent.
// Normally, the tab root link is included in the breadcrumb, as soon as we
// are on a local task or any other child link. However, if we are on a
// default local task (e.g., node/%/view), then we do not want the tab root
// link (e.g., node/%) to appear, as it would be identical to the current
// page. Since this behavior also needs to work recursively (i.e., on
// default local tasks of default local tasks), and since the last non-task
// link in the trail is used as page title (see menu_get_active_title()),
// this condition cannot be cleanly integrated into menu_get_active_trail().
// menu_get_active_trail() already skips all links that link to their parent
// (commonly MENU_DEFAULT_LOCAL_TASK). In order to also hide the parent link
// itself, we always remove the last link in the trail, if the current
// router item links to its parent.
if (($item['type'] & MENU_LINKS_TO_PARENT) == MENU_LINKS_TO_PARENT) {
array_pop($active_trail);
}
foreach ($active_trail as $parent) {
$breadcrumb[] = l($parent['title'], $parent['href'], $parent['localized_options']);
}
}
return $breadcrumb;
}
/**
* Gets the title of the current page, as determined by the active trail.
*/
function menu_get_active_title() {
$active_trail = menu_get_active_trail();
foreach (array_reverse($active_trail) as $item) {
if (!(bool) ($item['type'] & MENU_IS_LOCAL_TASK)) {
return $item['title'];
}
}
}
/**
* Gets a translated, access-checked menu link that is ready for rendering.
*
* This function should never be called from within node_load() or any other
* function used as a menu object load function since an infinite recursion may
* occur.
*
* @param $mlid
* The mlid of the menu item.
*
* @return
* A menu link, with $item['access'] filled and link translated for
* rendering.
*/
function menu_link_load($mlid) {
if (is_numeric($mlid)) {
$query = db_select('menu_links', 'ml');
$query->leftJoin('menu_router', 'm', 'm.path = ml.router_path');
$query->fields('ml');
// Weight should be taken from {menu_links}, not {menu_router}.
$query->addField('ml', 'weight', 'link_weight');
$query->fields('m');
$query->condition('ml.mlid', $mlid);
if ($item = $query->execute()->fetchAssoc()) {
$item['weight'] = $item['link_weight'];
_menu_link_translate($item);
return $item;
}
}
return FALSE;
}
/**
* Clears the cached cached data for a single named menu.
*/
function menu_cache_clear($menu_name = 'navigation') {
$cache_cleared = &drupal_static(__FUNCTION__, array());
if (empty($cache_cleared[$menu_name])) {
cache_clear_all('links:' . $menu_name . ':', 'cache_menu', TRUE);
$cache_cleared[$menu_name] = 1;
}
elseif ($cache_cleared[$menu_name] == 1) {
drupal_register_shutdown_function('cache_clear_all', 'links:' . $menu_name . ':', 'cache_menu', TRUE);
$cache_cleared[$menu_name] = 2;
}
// Also clear the menu system static caches.
menu_reset_static_cache();
}
/**
* Clears all cached menu data.
*
* This should be called any time broad changes
* might have been made to the router items or menu links.
*/
function menu_cache_clear_all() {
cache_clear_all('*', 'cache_menu', TRUE);
menu_reset_static_cache();
}
/**
* Resets the menu system static cache.
*/
function menu_reset_static_cache() {
drupal_static_reset('_menu_build_tree');
drupal_static_reset('menu_tree');
drupal_static_reset('menu_tree_all_data');
drupal_static_reset('menu_tree_page_data');
drupal_static_reset('menu_load_all');
drupal_static_reset('menu_link_get_preferred');
}
/**
* Checks whether a menu_rebuild() is necessary.
*/
function _menu_check_rebuild() {
// To absolutely ensure that the menu rebuild is required, re-load the
// variables in case they were set by another process.
$variables = variable_initialize();
if (empty($variables['menu_rebuild_needed']) && !empty($variables['menu_masks'])) {
unset($GLOBALS['conf']['menu_rebuild_needed']);
$GLOBALS['conf']['menu_masks'] = $variables['menu_masks'];
return FALSE;
}
return TRUE;
}
/**
* Populates the database tables used by various menu functions.
*
* This function will clear and populate the {menu_router} table, add entries
* to {menu_links} for new router items, and then remove stale items from
* {menu_links}. If called from update.php or install.php, it will also
* schedule a call to itself on the first real page load from
* menu_execute_active_handler(), because the maintenance page environment
* is different and leaves stale data in the menu tables.
*
* @return
* TRUE if the menu was rebuilt, FALSE if another thread was rebuilding
* in parallel and the current thread just waited for completion.
*/
function menu_rebuild() {
if (!lock_acquire('menu_rebuild')) {
// Wait for another request that is already doing this work.
// We choose to block here since otherwise the router item may not
// be available in menu_execute_active_handler() resulting in a 404.
lock_wait('menu_rebuild');
if (_menu_check_rebuild()) {
// If we get here and menu_masks was not set, then it is possible a menu
// is being reloaded, or that the process rebuilding the menu was unable
// to complete successfully. A missing menu_masks variable could result
// in a 404, so re-run the function.
return menu_rebuild();
}
return FALSE;
}
$transaction = db_transaction();
try {
list($menu, $masks) = menu_router_build();
_menu_router_save($menu, $masks);
_menu_navigation_links_rebuild($menu);
// Clear the menu, page and block caches.
menu_cache_clear_all();
_menu_clear_page_cache();
if (defined('MAINTENANCE_MODE')) {
variable_set('menu_rebuild_needed', TRUE);
}
else {
variable_del('menu_rebuild_needed');
}
}
catch (Exception $e) {
$transaction->rollback();
watchdog_exception('menu', $e);
}
// Explicitly commit the transaction now; this ensures that the database
// operations during the menu rebuild are committed before the lock is made
// available again, since locks may not always reside in the same database
// connection. The lock is acquired outside of the transaction so should also
// be released outside of it.
unset($transaction);
lock_release('menu_rebuild');
return TRUE;
}
/**
* Collects and alters the menu definitions.
*/
function menu_router_build() {
// We need to manually call each module so that we can know which module
// a given item came from.
$callbacks = array();
foreach (module_implements('menu') as $module) {
$router_items = call_user_func($module . '_menu');
if (isset($router_items) && is_array($router_items)) {
foreach (array_keys($router_items) as $path) {
$router_items[$path]['module'] = $module;
}
$callbacks = array_merge($callbacks, $router_items);
}
}
// Alter the menu as defined in modules, keys are like user/%user.
drupal_alter('menu', $callbacks);
list($menu, $masks) = _menu_router_build($callbacks);
_menu_router_cache($menu);
return array($menu, $masks);
}
/**
* Stores the menu router if we have it in memory.
*/
function _menu_router_cache($new_menu = NULL) {
$menu = &drupal_static(__FUNCTION__);
if (isset($new_menu)) {
$menu = $new_menu;
}
return $menu;
}
/**
* Gets the menu router.
*/
function menu_get_router() {
// Check first if we have it in memory already.
$menu = _menu_router_cache();
if (empty($menu)) {
list($menu, $masks) = menu_router_build();
}
return $menu;
}
/**
* Builds a link from a router item.
*/
function _menu_link_build($item) {
// Suggested items are disabled by default.
if ($item['type'] == MENU_SUGGESTED_ITEM) {
$item['hidden'] = 1;
}
// Hide all items that are not visible in the tree.
elseif (!($item['type'] & MENU_VISIBLE_IN_TREE)) {
$item['hidden'] = -1;
}
// Note, we set this as 'system', so that we can be sure to distinguish all
// the menu links generated automatically from entries in {menu_router}.
$item['module'] = 'system';
$item += array(
'menu_name' => 'navigation',
'link_title' => $item['title'],
'link_path' => $item['path'],
'hidden' => 0,
'options' => empty($item['description']) ? array() : array('attributes' => array('title' => $item['description'])),
);
return $item;
}
/**
* Builds menu links for the items in the menu router.
*/
function _menu_navigation_links_rebuild($menu) {
// Add normal and suggested items as links.
$menu_links = array();
foreach ($menu as $path => $item) {
if ($item['_visible']) {
$menu_links[$path] = $item;
$sort[$path] = $item['_number_parts'];
}
}
if ($menu_links) {
// Keep an array of processed menu links, to allow menu_link_save() to
// check this for parents instead of querying the database.
$parent_candidates = array();
// Make sure no child comes before its parent.
array_multisort($sort, SORT_NUMERIC, $menu_links);
foreach ($menu_links as $key => $item) {
$existing_item = db_select('menu_links')
->fields('menu_links')
->condition('link_path', $item['path'])
->condition('module', 'system')
->execute()->fetchAssoc();
if ($existing_item) {
$item['mlid'] = $existing_item['mlid'];
// A change in hook_menu may move the link to a different menu
if (empty($item['menu_name']) || ($item['menu_name'] == $existing_item['menu_name'])) {
$item['menu_name'] = $existing_item['menu_name'];
$item['plid'] = $existing_item['plid'];
}
else {
// It moved to a new menu. Let menu_link_save() try to find a new
// parent based on the path.
unset($item['plid']);
}
$item['has_children'] = $existing_item['has_children'];
$item['updated'] = $existing_item['updated'];
}
if ($existing_item && $existing_item['customized']) {
$parent_candidates[$existing_item['mlid']] = $existing_item;
}
else {
$item = _menu_link_build($item);
menu_link_save($item, $existing_item, $parent_candidates);
$parent_candidates[$item['mlid']] = $item;
unset($menu_links[$key]);
}
}
}
$paths = array_keys($menu);
// Updated and customized items whose router paths are gone need new ones.
$result = db_select('menu_links', NULL, array('fetch' => PDO::FETCH_ASSOC))
->fields('menu_links', array(
'link_path',
'mlid',
'router_path',
'updated',
))
->condition(db_or()
->condition('updated', 1)
->condition(db_and()
->condition('router_path', $paths, 'NOT IN')
->condition('external', 0)
->condition('customized', 1)
)
)
->execute();
foreach ($result as $item) {
$router_path = _menu_find_router_path($item['link_path']);
if (!empty($router_path) && ($router_path != $item['router_path'] || $item['updated'])) {
// If the router path and the link path matches, it's surely a working
// item, so we clear the updated flag.
$updated = $item['updated'] && $router_path != $item['link_path'];
db_update('menu_links')
->fields(array(
'router_path' => $router_path,
'updated' => (int) $updated,
))
->condition('mlid', $item['mlid'])
->execute();
}
}
// Find any item whose router path does not exist any more.
$result = db_select('menu_links')
->fields('menu_links')
->condition('router_path', $paths, 'NOT IN')
->condition('external', 0)
->condition('updated', 0)
->condition('customized', 0)
->orderBy('depth', 'DESC')
->execute();
// Remove all such items. Starting from those with the greatest depth will
// minimize the amount of re-parenting done by menu_link_delete().
foreach ($result as $item) {
_menu_delete_item($item, TRUE);
}
}
/**
* Clones an array of menu links.
*
* @param $links
* An array of menu links to clone.
* @param $menu_name
* (optional) The name of a menu that the links will be cloned for. If not
* set, the cloned links will be in the same menu as the original set of
* links that were passed in.
*
* @return
* An array of menu links with the same properties as the passed-in array,
* but with the link identifiers removed so that a new link will be created
* when any of them is passed in to menu_link_save().
*
* @see menu_link_save()
*/
function menu_links_clone($links, $menu_name = NULL) {
foreach ($links as &$link) {
unset($link['mlid']);
unset($link['plid']);
if (isset($menu_name)) {
$link['menu_name'] = $menu_name;
}
}
return $links;
}
/**
* Returns an array containing all links for a menu.
*
* @param $menu_name
* The name of the menu whose links should be returned.
*
* @return
* An array of menu links.
*/
function menu_load_links($menu_name) {
$links = db_select('menu_links', 'ml', array('fetch' => PDO::FETCH_ASSOC))
->fields('ml')
->condition('ml.menu_name', $menu_name)
// Order by weight so as to be helpful for menus that are only one level
// deep.
->orderBy('weight')
->execute()
->fetchAll();
foreach ($links as &$link) {
$link['options'] = unserialize($link['options']);
}
return $links;
}
/**
* Deletes all links for a menu.
*
* @param $menu_name
* The name of the menu whose links will be deleted.
*/
function menu_delete_links($menu_name) {
$links = menu_load_links($menu_name);
foreach ($links as $link) {
// To speed up the deletion process, we reset some link properties that
// would trigger re-parenting logic in _menu_delete_item() and
// _menu_update_parental_status().
$link['has_children'] = FALSE;
$link['plid'] = 0;
_menu_delete_item($link);
}
}
/**
* Delete one or several menu links.
*
* @param $mlid
* A valid menu link mlid or NULL. If NULL, $path is used.
* @param $path
* The path to the menu items to be deleted. $mlid must be NULL.
*/
function menu_link_delete($mlid, $path = NULL) {
if (isset($mlid)) {
_menu_delete_item(db_query("SELECT * FROM {menu_links} WHERE mlid = :mlid", array(':mlid' => $mlid))->fetchAssoc());
}
else {
$result = db_query("SELECT * FROM {menu_links} WHERE link_path = :link_path", array(':link_path' => $path));
foreach ($result as $link) {
_menu_delete_item($link);
}
}
}
/**
* Deletes a single menu link.
*
* @param $item
* Item to be deleted.
* @param $force
* Forces deletion. Internal use only, setting to TRUE is discouraged.
*
* @see menu_link_delete()
*/
function _menu_delete_item($item, $force = FALSE) {
$item = is_object($item) ? get_object_vars($item) : $item;
if ($item && ($item['module'] != 'system' || $item['updated'] || $force)) {
// Children get re-attached to the item's parent.
if ($item['has_children']) {
$result = db_query("SELECT mlid FROM {menu_links} WHERE plid = :plid", array(':plid' => $item['mlid']));
foreach ($result as $m) {
$child = menu_link_load($m->mlid);
$child['plid'] = $item['plid'];
menu_link_save($child);
}
}
// Notify modules we are deleting the item.
module_invoke_all('menu_link_delete', $item);
db_delete('menu_links')->condition('mlid', $item['mlid'])->execute();
// Update the has_children status of the parent.
_menu_update_parental_status($item);
menu_cache_clear($item['menu_name']);
_menu_clear_page_cache();
}
}
/**
* Saves a menu link.
*
* After calling this function, rebuild the menu cache using
* menu_cache_clear_all().
*
* @param $item
* An associative array representing a menu link item, with elements:
* - link_path: (required) The path of the menu item, which should be
* normalized first by calling drupal_get_normal_path() on it.
* - link_title: (required) Title to appear in menu for the link.
* - menu_name: (optional) The machine name of the menu for the link.
* Defaults to 'navigation'.
* - weight: (optional) Integer to determine position in menu. Default is 0.
* - expanded: (optional) Boolean that determines if the item is expanded.
* - options: (optional) An array of options, see l() for more.
* - mlid: (optional) Menu link identifier, the primary integer key for each
* menu link. Can be set to an existing value, or to 0 or NULL
* to insert a new link.
* - plid: (optional) The mlid of the parent.
* - router_path: (optional) The path of the relevant router item.
* @param $existing_item
* Optional, the current record from the {menu_links} table as an array.
* @param $parent_candidates
* Optional array of menu links keyed by mlid. Used by
* _menu_navigation_links_rebuild() only.
*
* @return
* The mlid of the saved menu link, or FALSE if the menu link could not be
* saved.
*/
function menu_link_save(&$item, $existing_item = array(), $parent_candidates = array()) {
drupal_alter('menu_link', $item);
// This is the easiest way to handle the unique internal path '<front>',
// since a path marked as external does not need to match a router path.
$item['external'] = (url_is_external($item['link_path']) || $item['link_path'] == '<front>') ? 1 : 0;
// Load defaults.
$item += array(
'menu_name' => 'navigation',
'weight' => 0,
'link_title' => '',
'hidden' => 0,
'has_children' => 0,
'expanded' => 0,
'options' => array(),
'module' => 'menu',
'customized' => 0,
'updated' => 0,
);
if (isset($item['mlid'])) {
if (!$existing_item) {
$existing_item = db_query('SELECT * FROM {menu_links} WHERE mlid = :mlid', array('mlid' => $item['mlid']))->fetchAssoc();
}
if ($existing_item) {
$existing_item['options'] = unserialize($existing_item['options']);
}
}
else {
$existing_item = FALSE;
}
// Try to find a parent link. If found, assign it and derive its menu.
$parent = _menu_link_find_parent($item, $parent_candidates);
if (!empty($parent['mlid'])) {
$item['plid'] = $parent['mlid'];
$item['menu_name'] = $parent['menu_name'];
}
// If no corresponding parent link was found, move the link to the top-level.
else {
$item['plid'] = 0;
}
$menu_name = $item['menu_name'];
if (!$existing_item) {
$item['mlid'] = db_insert('menu_links')
->fields(array(
'menu_name' => $item['menu_name'],
'plid' => $item['plid'],
'link_path' => $item['link_path'],
'hidden' => $item['hidden'],
'external' => $item['external'],
'has_children' => $item['has_children'],
'expanded' => $item['expanded'],
'weight' => $item['weight'],
'module' => $item['module'],
'link_title' => $item['link_title'],
'options' => serialize($item['options']),
'customized' => $item['customized'],
'updated' => $item['updated'],
))
->execute();
}
// Directly fill parents for top-level links.
if ($item['plid'] == 0) {
$item['p1'] = $item['mlid'];
for ($i = 2; $i <= MENU_MAX_DEPTH; $i++) {
$item["p$i"] = 0;
}
$item['depth'] = 1;
}
// Otherwise, ensure that this link's depth is not beyond the maximum depth
// and fill parents based on the parent link.
else {
if ($item['has_children'] && $existing_item) {
$limit = MENU_MAX_DEPTH - menu_link_children_relative_depth($existing_item) - 1;
}
else {
$limit = MENU_MAX_DEPTH - 1;
}
if ($parent['depth'] > $limit) {
return FALSE;
}
$item['depth'] = $parent['depth'] + 1;
_menu_link_parents_set($item, $parent);
}
// Need to check both plid and menu_name, since plid can be 0 in any menu.
if ($existing_item && ($item['plid'] != $existing_item['plid'] || $menu_name != $existing_item['menu_name'])) {
_menu_link_move_children($item, $existing_item);
}
// Find the router_path.
if (empty($item['router_path']) || !$existing_item || ($existing_item['link_path'] != $item['link_path'])) {
if ($item['external']) {
$item['router_path'] = '';
}
else {
// Find the router path which will serve this path.
$item['parts'] = explode('/', $item['link_path'], MENU_MAX_PARTS);
$item['router_path'] = _menu_find_router_path($item['link_path']);
}
}
// If every value in $existing_item is the same in the $item, there is no
// reason to run the update queries or clear the caches. We use
// array_intersect_key() with the $item as the first parameter because
// $item may have additional keys left over from building a router entry.
// The intersect removes the extra keys, allowing a meaningful comparison.
if (!$existing_item || (array_intersect_key($item, $existing_item) != $existing_item)) {
db_update('menu_links')
->fields(array(
'menu_name' => $item['menu_name'],
'plid' => $item['plid'],
'link_path' => $item['link_path'],
'router_path' => $item['router_path'],
'hidden' => $item['hidden'],
'external' => $item['external'],
'has_children' => $item['has_children'],
'expanded' => $item['expanded'],
'weight' => $item['weight'],
'depth' => $item['depth'],
'p1' => $item['p1'],
'p2' => $item['p2'],
'p3' => $item['p3'],
'p4' => $item['p4'],
'p5' => $item['p5'],
'p6' => $item['p6'],
'p7' => $item['p7'],
'p8' => $item['p8'],
'p9' => $item['p9'],
'module' => $item['module'],
'link_title' => $item['link_title'],
'options' => serialize($item['options']),
'customized' => $item['customized'],
))
->condition('mlid', $item['mlid'])
->execute();
// Check the has_children status of the parent.
_menu_update_parental_status($item);
menu_cache_clear($menu_name);
if ($existing_item && $menu_name != $existing_item['menu_name']) {
menu_cache_clear($existing_item['menu_name']);
}
// Notify modules we have acted on a menu item.
$hook = 'menu_link_insert';
if ($existing_item) {
$hook = 'menu_link_update';
}
module_invoke_all($hook, $item);
// Now clear the cache.
_menu_clear_page_cache();
}
return $item['mlid'];
}
/**
* Finds a possible parent for a given menu link.
*
* Because the parent of a given link might not exist anymore in the database,
* we apply a set of heuristics to determine a proper parent:
*
* - use the passed parent link if specified and existing.
* - else, use the first existing link down the previous link hierarchy
* - else, for system menu links (derived from hook_menu()), reparent
* based on the path hierarchy.
*
* @param $menu_link
* A menu link.
* @param $parent_candidates
* An array of menu links keyed by mlid.
*
* @return
* A menu link structure of the possible parent or FALSE if no valid parent
* has been found.
*/
function _menu_link_find_parent($menu_link, $parent_candidates = array()) {
$parent = FALSE;
// This item is explicitely top-level, skip the rest of the parenting.
if (isset($menu_link['plid']) && empty($menu_link['plid'])) {
return $parent;
}
// If we have a parent link ID, try to use that.
$candidates = array();
if (isset($menu_link['plid'])) {
$candidates[] = $menu_link['plid'];
}
// Else, if we have a link hierarchy try to find a valid parent in there.
if (!empty($menu_link['depth']) && $menu_link['depth'] > 1) {
for ($depth = $menu_link['depth'] - 1; $depth >= 1; $depth--) {
$candidates[] = $menu_link['p' . $depth];
}
}
foreach ($candidates as $mlid) {
if (isset($parent_candidates[$mlid])) {
$parent = $parent_candidates[$mlid];
}
else {
$parent = db_query("SELECT * FROM {menu_links} WHERE mlid = :mlid", array(':mlid' => $mlid))->fetchAssoc();
}
if ($parent) {
return $parent;
}
}
// If everything else failed, try to derive the parent from the path
// hierarchy. This only makes sense for links derived from menu router
// items (ie. from hook_menu()).
if ($menu_link['module'] == 'system') {
$query = db_select('menu_links');
$query->condition('module', 'system');
// We always respect the link's 'menu_name'; inheritance for router items is
// ensured in _menu_router_build().
$query->condition('menu_name', $menu_link['menu_name']);
// Find the parent - it must be unique.
$parent_path = $menu_link['link_path'];
do {
$parent = FALSE;
$parent_path = substr($parent_path, 0, strrpos($parent_path, '/'));
$new_query = clone $query;
$new_query->condition('link_path', $parent_path);
// Only valid if we get a unique result.
if ($new_query->countQuery()->execute()->fetchField() == 1) {
$parent = $new_query->fields('menu_links')->execute()->fetchAssoc();
}
} while ($parent === FALSE && $parent_path);
}
return $parent;
}
/**
* Clears the page and block caches at most twice per page load.
*/
function _menu_clear_page_cache() {
$cache_cleared = &drupal_static(__FUNCTION__, 0);
// Clear the page and block caches, but at most twice, including at
// the end of the page load when there are multiple links saved or deleted.
if ($cache_cleared == 0) {
cache_clear_all();
// Keep track of which menus have expanded items.
_menu_set_expanded_menus();
$cache_cleared = 1;
}
elseif ($cache_cleared == 1) {
drupal_register_shutdown_function('cache_clear_all');
// Keep track of which menus have expanded items.
drupal_register_shutdown_function('_menu_set_expanded_menus');
$cache_cleared = 2;
}
}
/**
* Updates a list of menus with expanded items.
*/
function _menu_set_expanded_menus() {
$names = db_query("SELECT menu_name FROM {menu_links} WHERE expanded <> 0 GROUP BY menu_name")->fetchCol();
variable_set('menu_expanded', $names);
}
/**
* Finds the router path which will serve this path.
*
* @param $link_path
* The path for we are looking up its router path.
*
* @return
* A path from $menu keys or empty if $link_path points to a nonexisting
* place.
*/
function _menu_find_router_path($link_path) {
// $menu will only have data during a menu rebuild.
$menu = _menu_router_cache();
$router_path = $link_path;
$parts = explode('/', $link_path, MENU_MAX_PARTS);
$ancestors = menu_get_ancestors($parts);
if (empty($menu)) {
// Not during a menu rebuild, so look up in the database.
$router_path = (string) db_select('menu_router')
->fields('menu_router', array('path'))
->condition('path', $ancestors, 'IN')
->orderBy('fit', 'DESC')
->range(0, 1)
->execute()->fetchField();
}
elseif (!isset($menu[$router_path])) {
// Add an empty router path as a fallback.
$ancestors[] = '';
foreach ($ancestors as $key => $router_path) {
if (isset($menu[$router_path])) {
// Exit the loop leaving $router_path as the first match.
break;
}
}
// If we did not find the path, $router_path will be the empty string
// at the end of $ancestors.
}
return $router_path;
}
/**
* Inserts, updates, or deletes an uncustomized menu link related to a module.
*
* @param $module
* The name of the module.
* @param $op
* Operation to perform: insert, update or delete.
* @param $link_path
* The path this link points to.
* @param $link_title
* Title of the link to insert or new title to update the link to.
* Unused for delete.
*
* @return
* The insert op returns the mlid of the new item. Others op return NULL.
*/
function menu_link_maintain($module, $op, $link_path, $link_title) {
switch ($op) {
case 'insert':
$menu_link = array(
'link_title' => $link_title,
'link_path' => $link_path,
'module' => $module,
);
return menu_link_save($menu_link);
break;
case 'update':
$result = db_query("SELECT * FROM {menu_links} WHERE link_path = :link_path AND module = :module AND customized = 0", array(':link_path' => $link_path, ':module' => $module))->fetchAll(PDO::FETCH_ASSOC);
foreach ($result as $link) {
$link['link_title'] = $link_title;
$link['options'] = unserialize($link['options']);
menu_link_save($link);
}
break;
case 'delete':
menu_link_delete(NULL, $link_path);
break;
}
}
/**
* Finds the depth of an item's children relative to its depth.
*
* For example, if the item has a depth of 2, and the maximum of any child in
* the menu link tree is 5, the relative depth is 3.
*
* @param $item
* An array representing a menu link item.
*
* @return
* The relative depth, or zero.
*
*/
function menu_link_children_relative_depth($item) {
$query = db_select('menu_links');
$query->addField('menu_links', 'depth');
$query->condition('menu_name', $item['menu_name']);
$query->orderBy('depth', 'DESC');
$query->range(0, 1);
$i = 1;
$p = 'p1';
while ($i <= MENU_MAX_DEPTH && $item[$p]) {
$query->condition($p, $item[$p]);
$p = 'p' . ++$i;
}
$max_depth = $query->execute()->fetchField();
return ($max_depth > $item['depth']) ? $max_depth - $item['depth'] : 0;
}
/**
* Updates the children of a menu link that is being moved.
*
* The menu name, parents (p1 - p6), and depth are updated for all children of
* the link, and the has_children status of the previous parent is updated.
*/
function _menu_link_move_children($item, $existing_item) {
$query = db_update('menu_links');
$query->fields(array('menu_name' => $item['menu_name']));
$p = 'p1';
$expressions = array();
for ($i = 1; $i <= $item['depth']; $p = 'p' . ++$i) {
$expressions[] = array($p, ":p_$i", array(":p_$i" => $item[$p]));
}
$j = $existing_item['depth'] + 1;
while ($i <= MENU_MAX_DEPTH && $j <= MENU_MAX_DEPTH) {
$expressions[] = array('p' . $i++, 'p' . $j++, array());
}
while ($i <= MENU_MAX_DEPTH) {
$expressions[] = array('p' . $i++, 0, array());
}
$shift = $item['depth'] - $existing_item['depth'];
if ($shift > 0) {
// The order of expressions must be reversed so the new values don't
// overwrite the old ones before they can be used because "Single-table
// UPDATE assignments are generally evaluated from left to right"
// see: http://dev.mysql.com/doc/refman/5.0/en/update.html
$expressions = array_reverse($expressions);
}
foreach ($expressions as $expression) {
$query->expression($expression[0], $expression[1], $expression[2]);
}
$query->expression('depth', 'depth + :depth', array(':depth' => $shift));
$query->condition('menu_name', $existing_item['menu_name']);
$p = 'p1';
for ($i = 1; $i <= MENU_MAX_DEPTH && $existing_item[$p]; $p = 'p' . ++$i) {
$query->condition($p, $existing_item[$p]);
}
$query->execute();
// Check the has_children status of the parent, while excluding this item.
_menu_update_parental_status($existing_item, TRUE);
}
/**
* Checks and updates the 'has_children' status for the parent of a link.
*/
function _menu_update_parental_status($item, $exclude = FALSE) {
// If plid == 0, there is nothing to update.
if ($item['plid']) {
// Check if at least one visible child exists in the table.
$query = db_select('menu_links');
$query->addField('menu_links', 'mlid');
$query->condition('menu_name', $item['menu_name']);
$query->condition('hidden', 0);
$query->condition('plid', $item['plid']);
$query->range(0, 1);
if ($exclude) {
$query->condition('mlid', $item['mlid'], '<>');
}
$parent_has_children = ((bool) $query->execute()->fetchField()) ? 1 : 0;
db_update('menu_links')
->fields(array('has_children' => $parent_has_children))
->condition('mlid', $item['plid'])
->execute();
}
}
/**
* Sets the p1 through p9 values for a menu link being saved.
*/
function _menu_link_parents_set(&$item, $parent) {
$i = 1;
while ($i < $item['depth']) {
$p = 'p' . $i++;
$item[$p] = $parent[$p];
}
$p = 'p' . $i++;
// The parent (p1 - p9) corresponding to the depth always equals the mlid.
$item[$p] = $item['mlid'];
while ($i <= MENU_MAX_DEPTH) {
$p = 'p' . $i++;
$item[$p] = 0;
}
}
/**
* Builds the router table based on the data from hook_menu().
*/
function _menu_router_build($callbacks) {
// First pass: separate callbacks from paths, making paths ready for
// matching. Calculate fitness, and fill some default values.
$menu = array();
$masks = array();
foreach ($callbacks as $path => $item) {
$load_functions = array();
$to_arg_functions = array();
$fit = 0;
$move = FALSE;
$parts = explode('/', $path, MENU_MAX_PARTS);
$number_parts = count($parts);
// We store the highest index of parts here to save some work in the fit
// calculation loop.
$slashes = $number_parts - 1;
// Extract load and to_arg functions.
foreach ($parts as $k => $part) {
$match = FALSE;
// Look for wildcards in the form allowed to be used in PHP functions,
// because we are using these to construct the load function names.
if (preg_match('/^%(|' . DRUPAL_PHP_FUNCTION_PATTERN . ')$/', $part, $matches)) {
if (empty($matches[1])) {
$match = TRUE;
$load_functions[$k] = NULL;
}
else {
if (function_exists($matches[1] . '_to_arg')) {
$to_arg_functions[$k] = $matches[1] . '_to_arg';
$load_functions[$k] = NULL;
$match = TRUE;
}
if (function_exists($matches[1] . '_load')) {
$function = $matches[1] . '_load';
// Create an array of arguments that will be passed to the _load
// function when this menu path is checked, if 'load arguments'
// exists.
$load_functions[$k] = isset($item['load arguments']) ? array($function => $item['load arguments']) : $function;
$match = TRUE;
}
}
}
if ($match) {
$parts[$k] = '%';
}
else {
$fit |= 1 << ($slashes - $k);
}
}
if ($fit) {
$move = TRUE;
}
else {
// If there is no %, it fits maximally.
$fit = (1 << $number_parts) - 1;
}
$masks[$fit] = 1;
$item['_load_functions'] = $load_functions;
$item['to_arg_functions'] = empty($to_arg_functions) ? '' : serialize($to_arg_functions);
$item += array(
'title' => '',
'weight' => 0,
'type' => MENU_NORMAL_ITEM,
'module' => '',
'_number_parts' => $number_parts,
'_parts' => $parts,
'_fit' => $fit,
);
$item += array(
'_visible' => (bool) ($item['type'] & MENU_VISIBLE_IN_BREADCRUMB),
'_tab' => (bool) ($item['type'] & MENU_IS_LOCAL_TASK),
);
if ($move) {
$new_path = implode('/', $item['_parts']);
$menu[$new_path] = $item;
$sort[$new_path] = $number_parts;
}
else {
$menu[$path] = $item;
$sort[$path] = $number_parts;
}
}
array_multisort($sort, SORT_NUMERIC, $menu);
// Apply inheritance rules.
foreach ($menu as $path => $v) {
$item = &$menu[$path];
if (!$item['_tab']) {
// Non-tab items.
$item['tab_parent'] = '';
$item['tab_root'] = $path;
}
// If not specified, assign the default tab type for local tasks.
elseif (!isset($item['context'])) {
$item['context'] = MENU_CONTEXT_PAGE;
}
for ($i = $item['_number_parts'] - 1; $i; $i--) {
$parent_path = implode('/', array_slice($item['_parts'], 0, $i));
if (isset($menu[$parent_path])) {
$parent = &$menu[$parent_path];
// If we have no menu name, try to inherit it from parent items.
if (!isset($item['menu_name'])) {
// If the parent item of this item does not define a menu name (and no
// previous iteration assigned one already), try to find the menu name
// of the parent item in the currently stored menu links.
if (!isset($parent['menu_name'])) {
$menu_name = db_query("SELECT menu_name FROM {menu_links} WHERE router_path = :router_path AND module = 'system'", array(':router_path' => $parent_path))->fetchField();
if ($menu_name) {
$parent['menu_name'] = $menu_name;
}
}
// If the parent item defines a menu name, inherit it.
if (!empty($parent['menu_name'])) {
$item['menu_name'] = $parent['menu_name'];
}
}
if (!isset($item['tab_parent'])) {
// Parent stores the parent of the path.
$item['tab_parent'] = $parent_path;
}
if (!isset($item['tab_root']) && !$parent['_tab']) {
$item['tab_root'] = $parent_path;
}
// If an access callback is not found for a default local task we use
// the callback from the parent, since we expect them to be identical.
// In all other cases, the access parameters must be specified.
if (($item['type'] == MENU_DEFAULT_LOCAL_TASK) && !isset($item['access callback']) && isset($parent['access callback'])) {
$item['access callback'] = $parent['access callback'];
if (!isset($item['access arguments']) && isset($parent['access arguments'])) {
$item['access arguments'] = $parent['access arguments'];
}
}
// Same for page callbacks.
if (!isset($item['page callback']) && isset($parent['page callback'])) {
$item['page callback'] = $parent['page callback'];
if (!isset($item['page arguments']) && isset($parent['page arguments'])) {
$item['page arguments'] = $parent['page arguments'];
}
if (!isset($item['file path']) && isset($parent['file path'])) {
$item['file path'] = $parent['file path'];
}
if (!isset($item['file']) && isset($parent['file'])) {
$item['file'] = $parent['file'];
if (empty($item['file path']) && isset($item['module']) && isset($parent['module']) && $item['module'] != $parent['module']) {
$item['file path'] = drupal_get_path('module', $parent['module']);
}
}
}
// Same for delivery callbacks.
if (!isset($item['delivery callback']) && isset($parent['delivery callback'])) {
$item['delivery callback'] = $parent['delivery callback'];
}
// Same for theme callbacks.
if (!isset($item['theme callback']) && isset($parent['theme callback'])) {
$item['theme callback'] = $parent['theme callback'];
if (!isset($item['theme arguments']) && isset($parent['theme arguments'])) {
$item['theme arguments'] = $parent['theme arguments'];
}
}
// Same for load arguments: if a loader doesn't have any explict
// arguments, try to find arguments in the parent.
if (!isset($item['load arguments'])) {
foreach ($item['_load_functions'] as $k => $function) {
// This loader doesn't have any explict arguments...
if (!is_array($function)) {
// ... check the parent for a loader at the same position
// using the same function name and defining arguments...
if (isset($parent['_load_functions'][$k]) && is_array($parent['_load_functions'][$k]) && key($parent['_load_functions'][$k]) === $function) {
// ... and inherit the arguments on the child.
$item['_load_functions'][$k] = $parent['_load_functions'][$k];
}
}
}
}
}
}
if (!isset($item['access callback']) && isset($item['access arguments'])) {
// Default callback.
$item['access callback'] = 'user_access';
}
if (!isset($item['access callback']) || empty($item['page callback'])) {
$item['access callback'] = 0;
}
if (is_bool($item['access callback'])) {
$item['access callback'] = intval($item['access callback']);
}
$item['load_functions'] = empty($item['_load_functions']) ? '' : serialize($item['_load_functions']);
$item += array(
'access arguments' => array(),
'access callback' => '',
'page arguments' => array(),
'page callback' => '',
'delivery callback' => '',
'title arguments' => array(),
'title callback' => 't',
'theme arguments' => array(),
'theme callback' => '',
'description' => '',
'position' => '',
'context' => 0,
'tab_parent' => '',
'tab_root' => $path,
'path' => $path,
'file' => '',
'file path' => '',
'include file' => '',
);
// Calculate out the file to be included for each callback, if any.
if ($item['file']) {
$file_path = $item['file path'] ? $item['file path'] : drupal_get_path('module', $item['module']);
$item['include file'] = $file_path . '/' . $item['file'];
}
}
// Sort the masks so they are in order of descending fit.
$masks = array_keys($masks);
rsort($masks);
return array($menu, $masks);
}
/**
* Saves data from menu_router_build() to the router table.
*/
function _menu_router_save($menu, $masks) {
// Delete the existing router since we have some data to replace it.
db_truncate('menu_router')->execute();
// Prepare insert object.
$insert = db_insert('menu_router')
->fields(array(
'path',
'load_functions',
'to_arg_functions',
'access_callback',
'access_arguments',
'page_callback',
'page_arguments',
'delivery_callback',
'fit',
'number_parts',
'context',
'tab_parent',
'tab_root',
'title',
'title_callback',
'title_arguments',
'theme_callback',
'theme_arguments',
'type',
'description',
'position',
'weight',
'include_file',
));
$num_records = 0;
foreach ($menu as $path => $item) {
// Fill in insert object values.
$insert->values(array(
'path' => $item['path'],
'load_functions' => $item['load_functions'],
'to_arg_functions' => $item['to_arg_functions'],
'access_callback' => $item['access callback'],
'access_arguments' => serialize($item['access arguments']),
'page_callback' => $item['page callback'],
'page_arguments' => serialize($item['page arguments']),
'delivery_callback' => $item['delivery callback'],
'fit' => $item['_fit'],
'number_parts' => $item['_number_parts'],
'context' => $item['context'],
'tab_parent' => $item['tab_parent'],
'tab_root' => $item['tab_root'],
'title' => $item['title'],
'title_callback' => $item['title callback'],
'title_arguments' => ($item['title arguments'] ? serialize($item['title arguments']) : ''),
'theme_callback' => $item['theme callback'],
'theme_arguments' => serialize($item['theme arguments']),
'type' => $item['type'],
'description' => $item['description'],
'position' => $item['position'],
'weight' => $item['weight'],
'include_file' => $item['include file'],
));
// Execute in batches to avoid the memory overhead of all of those records
// in the query object.
if (++$num_records == 20) {
$insert->execute();
$num_records = 0;
}
}
// Insert any remaining records.
$insert->execute();
// Store the masks.
variable_set('menu_masks', $masks);
return $menu;
}
/**
* Checks whether the site is in maintenance mode.
*
* This function will log the current user out and redirect to front page
* if the current user has no 'access site in maintenance mode' permission.
*
* @param $check_only
* If this is set to TRUE, the function will perform the access checks and
* return the site offline status, but not log the user out or display any
* messages.
*
* @return
* FALSE if the site is not in maintenance mode, the user login page is
* displayed, or the user has the 'access site in maintenance mode'
* permission. TRUE for anonymous users not being on the login page when the
* site is in maintenance mode.
*/
function _menu_site_is_offline($check_only = FALSE) {
// Check if site is in maintenance mode.
if (variable_get('maintenance_mode', 0)) {
if (user_access('access site in maintenance mode')) {
// Ensure that the maintenance mode message is displayed only once
// (allowing for page redirects) and specifically suppress its display on
// the maintenance mode settings page.
if (!$check_only && $_GET['q'] != 'admin/config/development/maintenance') {
if (user_access('administer site configuration')) {
drupal_set_message(t('Operating in maintenance mode. <a href="@url">Go online.</a>', array('@url' => url('admin/config/development/maintenance'))), 'status', FALSE);
}
else {
drupal_set_message(t('Operating in maintenance mode.'), 'status', FALSE);
}
}
}
else {
return TRUE;
}
}
return FALSE;
}
/**
* @} End of "defgroup menu".
*/