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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.
*
* 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. Menu items may
* omit this attribute to use the value provided by an ancestor 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.
*/
define('MENU_IS_ROOT', 0x0001);
define('MENU_VISIBLE_IN_TREE', 0x0002);
define('MENU_VISIBLE_IN_BREADCRUMB', 0x0004);
define('MENU_LINKS_TO_PARENT', 0x0008);
define('MENU_MODIFIED_BY_ADMIN', 0x0020);
define('MENU_CREATED_BY_ADMIN', 0x0040);
define('MENU_IS_LOCAL_TASK', 0x0080);
/**
* @} 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 the above flags.
*/
/**
* 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);
/**
* Callbacks simply register a path so that the correct function is fired
* when the URL is accessed. They are not shown in the menu.
*/
define('MENU_CALLBACK', MENU_VISIBLE_IN_BREADCRUMB);
/**
* 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);
/**
* Local tasks are rendered as tabs by default. Use this for 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);
/**
* 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);
/**
* @} End of "Menu item types".
*/
/**
* @defgroup menu_status_codes Menu status codes
* @{
* Status codes for menu callbacks.
*/
define('MENU_FOUND', 1);
define('MENU_NOT_FOUND', 2);
define('MENU_ACCESS_DENIED', 3);
define('MENU_SITE_OFFLINE', 4);
/**
* @} 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', 7);
/**
* The maximum depth of a menu links tree - matches the number of p columns.
*/
define('MENU_MAX_DEPTH', 9);
/**
* @} End of "Menu tree parameters".
*/
/**
* 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);
$placeholders = array();
$ancestors = array();
$length = $number_parts - 1;
$end = (1 << $number_parts) - 1;
$masks = variable_get('menu_masks', array());
// Only examine patterns that actually exist as router items (the masks).
foreach ($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; $j--) {
if ($i & (1 << $j)) {
$current .= $parts[$length - $j];
}
else {
$current .= '%';
}
if ($j) {
$current .= '/';
}
}
$placeholders[] = "'%s'";
$ancestors[] = $current;
}
return array($ancestors, $placeholders);
}
/**
* The menu system uses serialized arrays stored in the database for
* arguments. However, often these need to change according to the
* current path. This function unserializes such an array and does the
* necessary change.
*
* Integer values are mapped according to the $map parameter. For
* example, if unserialize($data) is array('view', 1) and $map is
* array('node', '12345') then 'view' will not be changed because
* it is not an integer, but 1 will as it is an integer. As $map[1]
* is '12345', 1 will be replaced with '12345'. So the result will
* be array('node_load', '12345').
*
* @param @data
* A serialized array.
* @param @map
* An array of potential replacements.
* @return
* The $data array unserialized and mapped.
*/
function menu_unserialize($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 $router_item
* The router item. Usually you take a router entry from menu_get_item and
* set it back either modified or to a different path. This lets you modify the
* navigation block, the page title, the breadcrumb and the page help in one
* call.
*/
function menu_set_item($path, $router_item) {
menu_get_item($path, $router_item);
}
/**
* Get a router item.
*
* @param $path
* The path, for example node/5. The function will find the corresponding
* node/% item and return that.
* @param $router_item
* Internal use only.
* @return
* The router item, an associate array corresponding to one row in the
* menu_router table. The value of key map holds the loaded objects. The
* value of key access is TRUE if the current user can access this page.
* The values for key title, page_arguments, access_arguments will be
* filled in based on the database values and the objects loaded.
*/
function menu_get_item($path = NULL, $router_item = NULL) {
static $router_items;
if (!isset($path)) {
$path = $_GET['q'];
}
if (isset($router_item)) {
$router_items[$path] = $router_item;
}
if (!isset($router_items[$path])) {
$original_map = arg(NULL, $path);
$parts = array_slice($original_map, 0, MENU_MAX_PARTS);
list($ancestors, $placeholders) = menu_get_ancestors($parts);
if ($router_item = db_fetch_array(db_query_range('SELECT * FROM {menu_router} WHERE path IN ('. implode (',', $placeholders) .') ORDER BY fit DESC', $ancestors, 0, 1))) {
$map = _menu_translate($router_item, $original_map);
if ($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']));
}
}
$router_items[$path] = $router_item;
}
return $router_items[$path];
}
/**
* Execute the page callback associated with the current path
*/
function menu_execute_active_handler($path = NULL) {
if (_menu_site_is_offline()) {
return MENU_SITE_OFFLINE;
}
// Rebuild if we know it's needed, or if the menu masks are missing which
// occurs rarely, likely due to a race condition of multiple rebuilds.
if (variable_get('menu_rebuild_needed', FALSE) || !variable_get('menu_masks', array())) {
menu_rebuild();
}
if ($router_item = menu_get_item($path)) {
if ($router_item['access']) {
if ($router_item['file']) {
require_once($router_item['file']);
}
return call_user_func_array($router_item['page_callback'], $router_item['page_arguments']);
}
else {
return MENU_ACCESS_DENIED;
}
}
return MENU_NOT_FOUND;
}
/**
* 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 (ex: 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 = $item['load_functions']) {
// If someone calls this function twice, then unserialize will fail.
if ($load_functions_unserialized = unserialize($load_functions)) {
$load_functions = $load_functions_unserialized;
}
$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
// occurances 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;
}
/**
* Check 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 (ex: array('node', '5'))
* @return
* $item['access'] becomes TRUE if the item is accessible, FALSE otherwise.
*/
function _menu_check_access(&$item, $map) {
// 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]);
}
else {
$item['access'] = call_user_func_array($callback, $arguments);
}
}
}
/**
* Localize 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'] = $item['options'];
// If we are translating the title of a menu link, and its title is the same
// as the corresponding router item, then we can use the title information
// from the router. If it's customized, then we need to use the link title
// itself; can't localize.
// If we are translating a router item (tabs, page, breadcrumb), then we
// can always use the information from the router item.
if (!$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) {
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 (ex: 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. $item['href'] is set according to the map.
* If an error occurs during calling the load_functions (like trying to load
* a non existing node) then this function return FALSE.
*/
function _menu_translate(&$router_item, $map, $to_arg = FALSE) {
if ($to_arg) {
// 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 = $map;
if (!_menu_load_objects($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('/', $router_item['path']);
for ($i = 0; $i < $router_item['number_parts']; $i++) {
if ($link_map[$i] == '%') {
$link_map[$i] = $path_map[$i];
}
}
$router_item['href'] = implode('/', $link_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;
}
/**
* This function translates the path elements in the map using any to_arg
* helper function. These functions take an argument and return an object.
* See http://drupal.org/node/109153 for more information.
*
* @param map
* An array of path arguments (ex: array('node', '5'))
* @param $to_arg_functions
* An array of helper function (ex: array(2 => 'menu_tail_to_arg'))
*/
function _menu_link_map_translate(&$map, $to_arg_functions) {
if ($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[$index]);
}
}
}
}
function menu_tail_to_arg($arg, $map, $index) {
return implode('/', array_slice($map, $index));
}
/**
* This function is similar to _menu_translate() but does link-specific
* preparation such as always calling to_arg functions.
*
* @param $item
* A menu link
* @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) {
$item['options'] = unserialize($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 {
$map = explode('/', $item['link_path']);
_menu_link_map_translate($map, $item['to_arg_functions']);
$item['href'] = implode('/', $map);
// Note - skip callbacks without real values for their arguments.
if (strpos($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 (!_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;
}
/**
* Get a loaded object from a router item.
*
* menu_get_object() will provide you the current node on paths like node/5,
* node/5/revisions/48 etc. menu_get_object('user') will give you the user
* account on user/5 etc. Note - this function should never be called within a
* _to_arg function (like user_current_to_arg()) since this may result in an
* infinite recursion.
*
* @param $type
* Type of the object. These appear in hook_menu definitons as %type. Core
* provides aggregator_feed, aggregator_category, contact, filter_format,
* forum_term, menu, menu_link, node, taxonomy_vocabulary, user. See the
* relevant {$type}_load function for more on each. Defaults to node.
* @param $position
* The expected position for $type object. For node/%node this is 1, for
* comment/reply/%node this is 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];
}
}
/**
* Render 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 $menu_name
* The name of the menu.
* @return
* The rendered HTML of that menu on the current page.
*/
function menu_tree($menu_name = 'navigation') {
static $menu_output = array();
if (!isset($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 a rendered menu tree.
*
* @param $tree
* A data structure representing the tree as returned from menu_tree_data.
* @return
* The rendered HTML of that data structure.
*/
function menu_tree_output($tree) {
$output = '';
$items = array();
// Pull out just the menu items we are going to render so that we
// get an accurate count for the first/last classes.
foreach ($tree as $data) {
if (!$data['link']['hidden']) {
$items[] = $data;
}
}
$num_items = count($items);
foreach ($items as $i => $data) {
$extra_class = array();
if ($i == 0) {
$extra_class[] = 'first';
}
if ($i == $num_items - 1) {
$extra_class[] = 'last';
}
$extra_class = implode(' ', $extra_class);
$link = theme('menu_item_link', $data['link']);
if ($data['below']) {
$output .= theme('menu_item', $link, $data['link']['has_children'], menu_tree_output($data['below']), $data['link']['in_active_trail'], $extra_class);
}
else {
$output .= theme('menu_item', $link, $data['link']['has_children'], '', $data['link']['in_active_trail'], $extra_class);
}
}
return $output ? theme('menu_tree', $output) : '';
}
/**
* Get 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 $item
* A fully loaded menu link, or NULL. If a link is supplied, only the
* path to root will be included in the returned tree- as if this link
* represented the current page in a visible menu.
* @return
* An tree of menu links in an array, in the order they should be rendered.
*/
function menu_tree_all_data($menu_name = 'navigation', $item = NULL) {
static $tree = array();
// Use $mlid as a flag for whether the data being loaded is for the whole tree.
$mlid = isset($item['mlid']) ? $item['mlid'] : 0;
// Generate a cache ID (cid) specific for this $menu_name and $item.
$cid = 'links:'. $menu_name .':all-cid:'. $mlid;
if (!isset($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 will just be the cid for the actual data.
// This avoids duplication of large amounts of data.
$cache = cache_get($cache->data, 'cache_menu');
if ($cache && isset($cache->data)) {
$data = $cache->data;
}
}
// If the tree data was not in the cache, $data will be NULL.
if (!isset($data)) {
// Build and run the query, and build the tree.
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.
$args = array(0);
for ($i = 1; $i < MENU_MAX_DEPTH; $i++) {
$args[] = $item["p$i"];
}
$args = array_unique($args);
$placeholders = implode(', ', array_fill(0, count($args), '%d'));
$where = ' AND ml.plid IN ('. $placeholders .')';
$parents = $args;
$parents[] = $item['mlid'];
}
else {
// Get all links in this menu.
$where = '';
$args = array();
$parents = array();
}
array_unshift($args, $menu_name);
// 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.
$data['tree'] = menu_tree_data(db_query("
SELECT m.load_functions, m.to_arg_functions, m.access_callback, m.access_arguments, m.page_callback, m.page_arguments, m.title, m.title_callback, m.title_arguments, m.type, m.description, ml.*
FROM {menu_links} ml LEFT JOIN {menu_router} m ON m.path = ml.router_path
WHERE ml.menu_name = '%s'". $where ."
ORDER BY p1 ASC, p2 ASC, p3 ASC, p4 ASC, p5 ASC, p6 ASC, p7 ASC, p8 ASC, p9 ASC", $args), $parents);
$data['node_links'] = array();
menu_tree_collect_node_links($data['tree'], $data['node_links']);
// Cache the data, if it is not already in the cache.
$tree_cid = _menu_tree_cid($menu_name, $data);
if (!cache_get($tree_cid, 'cache_menu')) {
cache_set($tree_cid, $data, 'cache_menu');
}
// Cache the cid of the (shared) data using the menu and item-specific cid.
cache_set($cid, $tree_cid, 'cache_menu');
}
// Check access for the current user to each item in the tree.
menu_tree_check_access($data['tree'], $data['node_links']);
$tree[$cid] = $data['tree'];
}
return $tree[$cid];
}
/**
* Get the data structure representing 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 $menu_name
* The named menu links to return
* @return
* An array of menu links, in the order they should be rendered. The array
* is a list of associative arrays -- these have two keys, link and below.
* link is a menu item, ready for theming as a link. Below represents the
* submenu below the link if there is one, and it is a subtree that has the
* same structure described for the top-level array.
*/
function menu_tree_page_data($menu_name = 'navigation') {
static $tree = array();
// Load the menu item corresponding to the current page.
if ($item = menu_get_item()) {
// Generate a cache ID (cid) specific for this page.
$cid = 'links:'. $menu_name .':page-cid:'. $item['href'] .':'. (int)$item['access'];
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 will just be the cid for the actual data.
// This avoids duplication of large amounts of data.
$cache = cache_get($cache->data, 'cache_menu');
if ($cache && isset($cache->data)) {
$data = $cache->data;
}
}
// If the tree data was not in the cache, $data will be NULL.
if (!isset($data)) {
// Build and run the query, and build the tree.
if ($item['access']) {
// Check whether a menu link exists that corresponds to the current path.
$args = array($menu_name, $item['href']);
$placeholders = "'%s'";
if (drupal_is_front_page()) {
$args[] = '<front>';
$placeholders .= ", '%s'";
}
$parents = db_fetch_array(db_query("SELECT p1, p2, p3, p4, p5, p6, p7, p8 FROM {menu_links} WHERE menu_name = '%s' AND link_path IN (". $placeholders .")", $args));
if (empty($parents)) {
// If no link exists, we may be on a local task that's not in the links.
// TODO: Handle the case like a local task on a specific node in the menu.
$parents = db_fetch_array(db_query("SELECT p1, p2, p3, p4, p5, p6, p7, p8 FROM {menu_links} WHERE menu_name = '%s' AND link_path = '%s'", $menu_name, $item['tab_root']));
}
// We always want all the top-level links with plid == 0.
$parents[] = '0';
// Use array_values() so that the indices are numeric for array_merge().
$args = $parents = array_unique(array_values($parents));
$placeholders = implode(', ', array_fill(0, count($args), '%d'));
$expanded = variable_get('menu_expanded', array());
// Check whether the current menu has any links set to be expanded.
if (in_array($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_query("SELECT mlid FROM {menu_links} WHERE menu_name = '%s' AND expanded = 1 AND has_children = 1 AND plid IN (". $placeholders .') AND mlid NOT IN ('. $placeholders .')', array_merge(array($menu_name), $args, $args));
$num_rows = FALSE;
while ($item = db_fetch_array($result)) {
$args[] = $item['mlid'];
$num_rows = TRUE;
}
$placeholders = implode(', ', array_fill(0, count($args), '%d'));
} while ($num_rows);
}
array_unshift($args, $menu_name);
}
else {
// Show only the top-level menu items when access is denied.
$args = array($menu_name, '0');
$placeholders = '%d';
$parents = array();
}
// 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.
$data['tree'] = menu_tree_data(db_query("
SELECT m.load_functions, m.to_arg_functions, m.access_callback, m.access_arguments, m.page_callback, m.page_arguments, m.title, m.title_callback, m.title_arguments, m.type, m.description, ml.*
FROM {menu_links} ml LEFT JOIN {menu_router} m ON m.path = ml.router_path
WHERE ml.menu_name = '%s' AND ml.plid IN (". $placeholders .")
ORDER BY p1 ASC, p2 ASC, p3 ASC, p4 ASC, p5 ASC, p6 ASC, p7 ASC, p8 ASC, p9 ASC", $args), $parents);
$data['node_links'] = array();
menu_tree_collect_node_links($data['tree'], $data['node_links']);
// Cache the data, if it is not already in the cache.
$tree_cid = _menu_tree_cid($menu_name, $data);
if (!cache_get($tree_cid, 'cache_menu')) {
cache_set($tree_cid, $data, 'cache_menu');
}
// Cache the cid of the (shared) data using the page-specific cid.
cache_set($cid, $tree_cid, 'cache_menu');
}
// Check access for the current user to each item in the tree.
menu_tree_check_access($data['tree'], $data['node_links']);
$tree[$cid] = $data['tree'];
}
return $tree[$cid];
}
return array();
}
/**
* Helper function - compute the real cache ID for menu tree data.
*/
function _menu_tree_cid($menu_name, $data) {
return 'links:'. $menu_name .':tree-data:'. md5(serialize($data));
}
/**
* Recursive helper function - collect node links.
*
* @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);
}
}
}
/**
* Check access and perform other 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) {
// Use db_rewrite_sql to evaluate view access without loading each full node.
$nids = array_keys($node_links);
$placeholders = '%d'. str_repeat(', %d', count($nids) - 1);
$result = db_query(db_rewrite_sql("SELECT n.nid FROM {node} n WHERE n.status = 1 AND n.nid IN (". $placeholders .")"), $nids);
while ($node = db_fetch_array($result)) {
$nid = $node['nid'];
foreach ($node_links[$nid] as $mlid => $link) {
$node_links[$nid][$mlid]['access'] = TRUE;
}
}
}
_menu_tree_check_access($tree);
return;
}
/**
* Recursive helper function for menu_tree_check_access()
*/
function _menu_tree_check_access(&$tree) {
$new_tree = array();
foreach ($tree as $key => $v) {
$item = &$tree[$key]['link'];
_menu_link_translate($item);
if ($item['access']) {
if ($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;
}
/**
* Build the data representing a menu tree.
*
* @param $result
* The database result.
* @param $parents
* An array of the plid values that represent the path from the current page
* to the root of the menu tree.
* @param $depth
* The depth of the current menu tree.
* @return
* See menu_tree_page_data for a description of the data structure.
*/
function menu_tree_data($result = NULL, $parents = array(), $depth = 1) {
list(, $tree) = _menu_tree_data($result, $parents, $depth);
return $tree;
}
/**
* Recursive helper function to build the data representing a menu tree.
*
* The function is a bit complex because the rendering of an item depends on
* the next menu item. So we are always rendering the element previously
* processed not the current one.
*/
function _menu_tree_data($result, $parents, $depth, $previous_element = '') {
$remnant = NULL;
$tree = array();
while ($item = db_fetch_array($result)) {
// 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'], $parents);
// The current item is the first in a new submenu.
if ($item['depth'] > $depth) {
// _menu_tree returns an item and the menu tree structure.
list($item, $below) = _menu_tree_data($result, $parents, $item['depth'], $item);
if ($previous_element) {
$tree[$previous_element['mlid']] = array(
'link' => $previous_element,
'below' => $below,
);
}
else {
$tree = $below;
}
// We need to fall back one level.
if (!isset($item) || $item['depth'] < $depth) {
return array($item, $tree);
}
// This will be the link to be output in the next iteration.
$previous_element = $item;
}
// We are at the same depth, so we use the previous element.
elseif ($item['depth'] == $depth) {
if ($previous_element) {
// Only the first time.
$tree[$previous_element['mlid']] = array(
'link' => $previous_element,
'below' => FALSE,
);
}
// This will be the link to be output in the next iteration.
$previous_element = $item;
}
// The submenu ended with the previous item, so pass back the current item.
else {
$remnant = $item;
break;
}
}
if ($previous_element) {
// We have one more link dangling.
$tree[$previous_element['mlid']] = array(
'link' => $previous_element,
'below' => FALSE,
);
}
return array($remnant, $tree);
}
/**
* Generate the HTML output for a single menu link.
*
* @ingroup themeable
*/
function theme_menu_item_link($link) {
if (empty($link['localized_options'])) {
$link['localized_options'] = array();
}
return l($link['title'], $link['href'], $link['localized_options']);
}
/**
* Generate the HTML output for a menu tree
*
* @ingroup themeable
*/
function theme_menu_tree($tree) {
return '<ul class="menu">'. $tree .'</ul>';
}
/**
* Generate the HTML output for a menu item and submenu.
*
* @ingroup themeable
*/
function theme_menu_item($link, $has_children, $menu = '', $in_active_trail = FALSE, $extra_class = NULL) {
$class = ($menu ? 'expanded' : ($has_children ? 'collapsed' : 'leaf'));
if (!empty($extra_class)) {
$class .= ' '. $extra_class;
}
if ($in_active_trail) {
$class .= ' active-trail';
}
return '<li class="'. $class .'">'. $link . $menu ."</li>\n";
}
/**
* Generate the HTML output for a single local task link.
*
* @ingroup themeable
*/
function theme_menu_local_task($link, $active = FALSE) {
return '<li '. ($active ? 'class="active" ' : '') .'>'. $link ."</li>\n";
}
/**
* 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));
$empty_arg = drupal_help_arg();
foreach (module_list() as $name) {
if (module_hook($name, 'help')) {
// Lookup help for this path.
if ($help = module_invoke($name, 'help', $router_path, $arg)) {
$output .= $help ."\n";
}
// Add "more help" link on admin pages if the module provides a
// standalone help page.
if ($arg[0] == "admin" && module_exists('help') && module_invoke($name, 'help', 'admin/help#'. $arg[2], $empty_arg) && $help) {
$output .= theme("more_help_link", url('admin/help/'. $arg[2]));
}
}
}
return $output;
}
/**
* Build a list of named menus.
*/
function menu_get_names($reset = FALSE) {
static $names;
if ($reset || empty($names)) {
$names = array();
$result = db_query("SELECT DISTINCT(menu_name) FROM {menu_links} ORDER BY menu_name");
while ($name = db_fetch_array($result)) {
$names[] = $name['menu_name'];
}
}
return $names;
}
/**
* Return an array containing the names of system-defined (default) menus.
*/
function menu_list_system_menus() {
return array('navigation', 'primary-links', 'secondary-links');
}
/**
* Return an array of links to be rendered as the Primary links.
*/
function menu_primary_links() {
return menu_navigation_links(variable_get('menu_primary_links_source', 'primary-links'));
}
/**
* Return an array of links to be rendered as the Secondary links.
*/
function menu_secondary_links() {
// 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', 'secondary-links') == variable_get('menu_primary_links_source', 'primary-links')) {
return menu_navigation_links(variable_get('menu_primary_links_source', 'primary-links'), 1);
}
else {
return menu_navigation_links(variable_get('menu_secondary_links_source', 'secondary-links'), 0);
}
}
/**
* Return 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);
// 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.
$links = array();
foreach ($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';
}
// 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) for a given level.
*
* @param $level
* The level of tasks you ask for. Primary tasks are 0, secondary are 1.
* @param $return_root
* Whether to return the root path for the current page.
* @return
* Themed output corresponding to the tabs of the requested level, or
* router path if $return_root == TRUE. This router path corresponds to
* a parent tab, if the current page is a default local task.
*/
function menu_local_tasks($level = 0, $return_root = FALSE) {
static $tabs;
static $root_path;
if (!isset($tabs)) {
$tabs = array();
$router_item = menu_get_item();
if (!$router_item || !$router_item['access']) {
return '';
}
// Get all tabs and the root page.
$result = db_query("SELECT * FROM {menu_router} WHERE tab_root = '%s' ORDER BY weight, title", $router_item['tab_root']);
$map = arg();
$children = array();
$tasks = array();
$root_path = $router_item['path'];
while ($item = db_fetch_array($result)) {
_menu_translate($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).
$depth = 1001;
while (isset($children[$path])) {
$tabs_current = '';
$next_path = '';
$count = 0;
foreach ($children[$path] as $item) {
if ($item['access']) {
$count++;
// The default task is always active.
if ($item['type'] == MENU_DEFAULT_LOCAL_TASK) {
// Find the first parent which is not a default local task.
for ($p = $item['tab_parent']; $tasks[$p]['type'] == MENU_DEFAULT_LOCAL_TASK; $p = $tasks[$p]['tab_parent']);
$link = theme('menu_item_link', array('href' => $tasks[$p]['href']) + $item);
$tabs_current .= theme('menu_local_task', $link, TRUE);
$next_path = $item['path'];
}
else {
$link = theme('menu_item_link', $item);
$tabs_current .= theme('menu_local_task', $link);
}
}
}
$path = $next_path;
$tabs[$depth]['count'] = $count;
$tabs[$depth]['output'] = $tabs_current;
$depth++;
}
// 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 = '';
$next_path = '';
$next_parent = '';
$count = 0;
foreach ($children[$parent] as $item) {
if ($item['access']) {
$count++;
if ($item['type'] == MENU_DEFAULT_LOCAL_TASK) {
// Find the first parent which is not a default local task.
for ($p = $item['tab_parent']; $tasks[$p]['type'] == MENU_DEFAULT_LOCAL_TASK; $p = $tasks[$p]['tab_parent']);
$link = theme('menu_item_link', array('href' => $tasks[$p]['href']) + $item);
if ($item['path'] == $router_item['path']) {
$root_path = $tasks[$p]['path'];
}
}
else {
$link = theme('menu_item_link', $item);
}
// We check for the active tab.
if ($item['path'] == $path) {
$tabs_current .= theme('menu_local_task', $link, TRUE);
$next_path = $item['tab_parent'];
if (isset($tasks[$next_path])) {
$next_parent = $tasks[$next_path]['tab_parent'];
}
}
else {
$tabs_current .= theme('menu_local_task', $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);
}
if ($return_root) {
return $root_path;
}
else {
// We do not display single tabs.
return (isset($tabs[$level]) && $tabs[$level]['count'] > 1) ? $tabs[$level]['output'] : '';
}
}
/**
* Returns the rendered local tasks at the top level.
*/
function menu_primary_local_tasks() {
return menu_local_tasks(0);
}
/**
* Returns the rendered local tasks at the second level.
*/
function menu_secondary_local_tasks() {
return menu_local_tasks(1);
}
/**
* Returns the router path, or the path of the parent tab of a default local task.
*/
function menu_tab_root_path() {
return menu_local_tasks(0, TRUE);
}
/**
* Returns the rendered local tasks. The default implementation renders them as tabs.
*
* @ingroup themeable
*/
function theme_menu_local_tasks() {
$output = '';
if ($primary = menu_primary_local_tasks()) {
$output .= "<ul class=\"tabs primary\">\n". $primary ."</ul>\n";
}
if ($secondary = menu_secondary_local_tasks()) {
$output .= "<ul class=\"tabs secondary\">\n". $secondary ."</ul>\n";
}
return $output;
}
/**
* Set (or get) the active menu for the current page - determines the active trail.
*/
function menu_set_active_menu_name($menu_name = NULL) {
static $active;
if (isset($menu_name)) {
$active = $menu_name;
}
elseif (!isset($active)) {
$active = 'navigation';
}
return $active;
}
/**
* Get the active menu for the current page - determines the active trail.
*/
function menu_get_active_menu_name() {
return menu_set_active_menu_name();
}
/**
* Set the active path, which determines which page is loaded.
*
* @param $path
* A Drupal path - not a path alias.
*
* Note that this may not have the desired effect unless invoked very early
* in the page load, such as during hook_boot, or unless you call
* menu_execute_active_handler() to generate your page output.
*/
function menu_set_active_item($path) {
$_GET['q'] = $path;
}
/**
* Sets or gets the active trail (path to root menu root) of the current page.
*
* @param $new_trail
* Menu trail to set, or NULL to use previously-set or calculated trail. If
* supplying a trail, use the same format as the return value (see below).
*
* @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).
* If $new_trail is supplied, the value is saved in a static variable and
* returned. If $new_trail is not supplied, and there is a saved value from
* a previous call, the saved value is returned. If $new_trail is not supplied
* and there is no saved value, the path to the current page is calculated,
* saved as the static value, and returned.
*/
function menu_set_active_trail($new_trail = NULL) {
static $trail;
if (isset($new_trail)) {
$trail = $new_trail;
}
elseif (!isset($trail)) {
$trail = array();
$trail[] = array('title' => t('Home'), 'href' => '<front>', 'localized_options' => array(), 'type' => 0);
$item = menu_get_item();
// Check whether the current item is a local task (displayed as a tab).
if ($item['tab_parent']) {
// The title of a local task is used for the tab, never the page title.
// Thus, replace it with the item corresponding to the root path to get
// the relevant href and title. For example, the menu item corresponding
// to 'admin' is used when on the 'By module' tab at 'admin/by-module'.
$parts = explode('/', $item['tab_root']);
$args = arg();
// Replace wildcards in the root path using the current path.
foreach ($parts as $index => $part) {
if ($part == '%') {
$parts[$index] = $args[$index];
}
}
// Retrieve the menu item using the root path after wildcard replacement.
$root_item = menu_get_item(implode('/', $parts));
if ($root_item && $root_item['access']) {
$item = $root_item;
}
}
$tree = menu_tree_page_data(menu_get_active_menu_name());
list($key, $curr) = each($tree);
while ($curr) {
// Terminate the loop when we find the current path in the active trail.
if ($curr['link']['href'] == $item['href']) {
$trail[] = $curr['link'];
$curr = FALSE;
}
else {
// Add the link if it's in the active trail, then move to the link below.
if ($curr['link']['in_active_trail']) {
$trail[] = $curr['link'];
$tree = $curr['below'] ? $curr['below'] : array();
}
list($key, $curr) = each($tree);
}
}
// Make sure the current page is in the trail (needed for the page title),
// but exclude tabs and the front page.
$last = count($trail) - 1;
if ($trail[$last]['href'] != $item['href'] && !(bool)($item['type'] & MENU_IS_LOCAL_TASK) && !drupal_is_front_page()) {
$trail[] = $item;
}
}
return $trail;
}
/**
* Gets the active trail (path to root menu root) of the current page.
*
* See menu_set_active_trail() for details of return value.
*/
function menu_get_active_trail() {
return menu_set_active_trail();
}
/**
* Get the breadcrumb for the current page, as determined by the active trail.
*/
function menu_get_active_breadcrumb() {
$breadcrumb = array();
// No breadcrumb for the front page.
if (drupal_is_front_page()) {
return $breadcrumb;
}
$item = menu_get_item();
if ($item && $item['access']) {
$active_trail = menu_get_active_trail();
foreach ($active_trail as $parent) {
$breadcrumb[] = l($parent['title'], $parent['href'], $parent['localized_options']);
}
$end = end($active_trail);
// Don't show a link to the current page in the breadcrumb trail.
if ($item['href'] == $end['href'] || ($item['type'] == MENU_DEFAULT_LOCAL_TASK && $end['href'] != '<front>')) {
array_pop($breadcrumb);
}
}
return $breadcrumb;
}
/**
* Get 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'];
}
}
}
/**
* Get a menu link by its mlid, access checked and link translated 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) && $item = db_fetch_array(db_query("SELECT m.*, ml.* FROM {menu_links} ml LEFT JOIN {menu_router} m ON m.path = ml.router_path WHERE ml.mlid = %d", $mlid))) {
_menu_link_translate($item);
return $item;
}
return FALSE;
}
/**
* Clears the cached cached data for a single named menu.
*/
function menu_cache_clear($menu_name = 'navigation') {
static $cache_cleared = array();
if (empty($cache_cleared[$menu_name])) {
cache_clear_all('links:'. $menu_name .':', 'cache_menu', TRUE);
$cache_cleared[$menu_name] = 1;
}
elseif ($cache_cleared[$menu_name] == 1) {
register_shutdown_function('cache_clear_all', 'links:'. $menu_name .':', 'cache_menu', TRUE);
$cache_cleared[$menu_name] = 2;
}
}
/**
* 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);
}
/**
* (Re)populate 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, 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.
*/
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 avaiable in menu_execute_active_handler() resulting in a 404.
lock_wait('menu_rebuild');
return FALSE;
}
$menu = menu_router_build(TRUE);
_menu_navigation_links_rebuild($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');
}
lock_release('menu_rebuild');
return TRUE;
}
/**
* Collect, alter and store the menu definitions.
*/
function menu_router_build($reset = FALSE) {
static $menu;
if (!isset($menu) || $reset) {
// 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);
$menu = _menu_router_build($callbacks);
_menu_router_cache($menu);
}
return $menu;
}
/**
* Helper function to store the menu router if we have it in memory.
*/
function _menu_router_cache($new_menu = NULL) {
static $menu = NULL;
if (isset($new_menu)) {
$menu = $new_menu;
}
return $menu;
}
/**
* Builds a link from a router item.
*/
function _menu_link_build($item) {
if ($item['type'] == MENU_CALLBACK) {
$item['hidden'] = -1;
}
elseif ($item['type'] == MENU_SUGGESTED_ITEM) {
$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 $item;
}
/**
* Helper function to build menu links for the items in the menu router.
*/
function _menu_navigation_links_rebuild($menu) {
// Add normal and suggested items as links.
$menu_links = array();
foreach ($menu as $path => $item) {
if ($item['_visible']) {
$item = _menu_link_build($item);
$menu_links[$path] = $item;
$sort[$path] = $item['_number_parts'];
}
}
if ($menu_links) {
// Make sure no child comes before its parent.
array_multisort($sort, SORT_NUMERIC, $menu_links);
foreach ($menu_links as $item) {
$existing_item = db_fetch_array(db_query("SELECT mlid, menu_name, plid, customized, has_children, updated FROM {menu_links} WHERE link_path = '%s' AND module = '%s'", $item['link_path'], 'system'));
if ($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'];
}
$item['has_children'] = $existing_item['has_children'];
$item['updated'] = $existing_item['updated'];
}
if (!$existing_item || !$existing_item['customized']) {
menu_link_save($item);
}
}
}
$placeholders = db_placeholders($menu, 'varchar');
$paths = array_keys($menu);
// Updated and customized items whose router paths are gone need new ones.
$result = db_query("SELECT ml.link_path, ml.mlid, ml.router_path, ml.updated FROM {menu_links} ml WHERE ml.updated = 1 OR (router_path NOT IN ($placeholders) AND external = 0 AND customized = 1)", $paths);
while ($item = db_fetch_array($result)) {
$router_path = _menu_find_router_path($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_query("UPDATE {menu_links} SET router_path = '%s', updated = %d WHERE mlid = %d", $router_path, $updated, $item['mlid']);
}
}
// Find any item whose router path does not exist any more.
$result = db_query("SELECT * FROM {menu_links} WHERE router_path NOT IN ($placeholders) AND external = 0 AND updated = 0 AND customized = 0 ORDER BY depth DESC", $paths);
// Remove all such items. Starting from those with the greatest depth will
// minimize the amount of re-parenting done by menu_link_delete().
while ($item = db_fetch_array($result)) {
_menu_delete_item($item, TRUE);
}
}
/**
* 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_fetch_array(db_query("SELECT * FROM {menu_links} WHERE mlid = %d", $mlid)));
}
else {
$result = db_query("SELECT * FROM {menu_links} WHERE link_path = '%s'", $path);
while ($link = db_fetch_array($result)) {
_menu_delete_item($link);
}
}
}
/**
* Helper function for menu_link_delete; deletes a single menu link.
*
* @param $item
* Item to be deleted.
* @param $force
* Forces deletion. Internal use only, setting to TRUE is discouraged.
*/
function _menu_delete_item($item, $force = FALSE) {
if ($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 = %d", $item['mlid']);
while ($m = db_fetch_array($result)) {
$child = menu_link_load($m['mlid']);
$child['plid'] = $item['plid'];
menu_link_save($child);
}
}
db_query('DELETE FROM {menu_links} WHERE mlid = %d', $item['mlid']);
// Update the has_children status of the parent.
_menu_update_parental_status($item);
menu_cache_clear($item['menu_name']);
_menu_clear_page_cache();
}
}
/**
* Save a menu link.
*
* @param $item
* An array representing a menu link item. The only mandatory keys are
* link_path and link_title. Possible keys are:
* - menu_name: Default is navigation.
* - weight: Default is 0.
* - expanded: Whether the item is expanded.
* - options: An array of options, see l() for more.
* - mlid: Set to an existing value, or 0 or NULL to insert a new link.
* - plid: The mlid of the parent.
* - router_path: The path of the relevant router item.
*
* @return
* The mlid of the saved menu link, or FALSE if the menu link could not be
* saved.
*/
function menu_link_save(&$item) {
// Get the router if it's already in memory. $menu will be NULL, unless this
// is during a menu rebuild
$menu = _menu_router_cache();
drupal_alter('menu_link', $item, $menu);
// 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.
$item['_external'] = menu_path_is_external($item['link_path']) || $item['link_path'] == '<front>';
// 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,
);
$existing_item = FALSE;
if (isset($item['mlid'])) {
$existing_item = db_fetch_array(db_query("SELECT * FROM {menu_links} WHERE mlid = %d", $item['mlid']));
}
if (isset($item['plid'])) {
$parent = db_fetch_array(db_query("SELECT * FROM {menu_links} WHERE mlid = %d", $item['plid']));
}
else {
// Find the parent - it must be unique.
$parent_path = $item['link_path'];
$where = "WHERE link_path = '%s'";
// Only links derived from router items should have module == 'system', and
// we want to find the parent even if it's in a different menu.
if ($item['module'] == 'system') {
$where .= " AND module = '%s'";
$arg2 = 'system';
}
else {
// If not derived from a router item, we respect the specified menu name.
$where .= " AND menu_name = '%s'";
$arg2 = $item['menu_name'];
}
do {
$parent = FALSE;
$parent_path = substr($parent_path, 0, strrpos($parent_path, '/'));
$result = db_query("SELECT COUNT(*) FROM {menu_links} ". $where, $parent_path, $arg2);
// Only valid if we get a unique result.
if (db_result($result) == 1) {
$parent = db_fetch_array(db_query("SELECT * FROM {menu_links} ". $where, $parent_path, $arg2));
}
} while ($parent === FALSE && $parent_path);
}
if ($parent !== FALSE) {
$item['menu_name'] = $parent['menu_name'];
}
$menu_name = $item['menu_name'];
// Menu callbacks need to be in the links table for breadcrumbs, but can't
// be parents if they are generated directly from a router item.
if (empty($parent['mlid']) || $parent['hidden'] < 0) {
$item['plid'] = 0;
}
else {
$item['plid'] = $parent['mlid'];
}
if (!$existing_item) {
db_query("INSERT INTO {menu_links} (
menu_name, plid, link_path,
hidden, external, has_children,
expanded, weight,
module, link_title, options,
customized, updated) VALUES (
'%s', %d, '%s',
%d, %d, %d,
%d, %d,
'%s', '%s', '%s', %d, %d)",
$item['menu_name'], $item['plid'], $item['link_path'],
$item['hidden'], $item['_external'], $item['has_children'],
$item['expanded'], $item['weight'],
$item['module'], $item['link_title'], serialize($item['options']),
$item['customized'], $item['updated']);
$item['mlid'] = db_last_insert_id('menu_links', 'mlid');
}
if (!$item['plid']) {
$item['p1'] = $item['mlid'];
for ($i = 2; $i <= MENU_MAX_DEPTH; $i++) {
$item["p$i"] = 0;
}
$item['depth'] = 1;
}
else {
// Cannot add beyond the maximum depth.
if ($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, $existing_item);
}
// Find the callback. During the menu update we store empty paths to be
// fixed later, so we skip this.
if (!isset($_SESSION['system_update_6021']) && (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']);
}
}
db_query("UPDATE {menu_links} SET menu_name = '%s', plid = %d, link_path = '%s',
router_path = '%s', hidden = %d, external = %d, has_children = %d,
expanded = %d, weight = %d, depth = %d,
p1 = %d, p2 = %d, p3 = %d, p4 = %d, p5 = %d, p6 = %d, p7 = %d, p8 = %d, p9 = %d,
module = '%s', link_title = '%s', options = '%s', customized = %d WHERE mlid = %d",
$item['menu_name'], $item['plid'], $item['link_path'],
$item['router_path'], $item['hidden'], $item['_external'], $item['has_children'],
$item['expanded'], $item['weight'], $item['depth'],
$item['p1'], $item['p2'], $item['p3'], $item['p4'], $item['p5'], $item['p6'], $item['p7'], $item['p8'], $item['p9'],
$item['module'], $item['link_title'], serialize($item['options']), $item['customized'], $item['mlid']);
// Check the has_children status of the parent.
_menu_update_parental_status($item);
menu_cache_clear($menu_name);
if ($existing_item && $menu_name != $existing_item['menu_name']) {
menu_cache_clear($existing_item['menu_name']);
}
_menu_clear_page_cache();
return $item['mlid'];
}
/**
* Helper function to clear the page and block caches at most twice per page load.
*/
function _menu_clear_page_cache() {
static $cache_cleared = 0;
// Clear the page and block caches, but at most twice, including at
// the end of the page load when there are multple links saved or deleted.
if (empty($cache_cleared)) {
cache_clear_all();
// Keep track of which menus have expanded items.
_menu_set_expanded_menus();
$cache_cleared = 1;
}
elseif ($cache_cleared == 1) {
register_shutdown_function('cache_clear_all');
// Keep track of which menus have expanded items.
register_shutdown_function('_menu_set_expanded_menus');
$cache_cleared = 2;
}
}
/**
* Helper function to update a list of menus with expanded items
*/
function _menu_set_expanded_menus() {
$names = array();
$result = db_query("SELECT menu_name FROM {menu_links} WHERE expanded != 0 GROUP BY menu_name");
while ($n = db_fetch_array($result)) {
$names[] = $n['menu_name'];
}
variable_set('menu_expanded', $names);
}
/**
* Find 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('/', $link_path, MENU_MAX_PARTS);
list($ancestors, $placeholders) = menu_get_ancestors($parts);
if (empty($menu)) {
// Not during a menu rebuild, so look up in the database.
$router_path = (string)db_result(db_query_range('SELECT path FROM {menu_router} WHERE path IN ('. implode (',', $placeholders) .') ORDER BY fit DESC', $ancestors, 0, 1));
}
elseif (!isset($menu[$router_path])) {
// Add an empty 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;
}
/**
* Insert, update or delete 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':
db_query("UPDATE {menu_links} SET link_title = '%s' WHERE link_path = '%s' AND customized = 0 AND module = '%s'", $link_title, $link_path, $module);
$result = db_query("SELECT menu_name FROM {menu_links} WHERE link_path = '%s' AND customized = 0 AND module = '%s'", $link_path, $module);
while ($item = db_fetch_array($result)) {
menu_cache_clear($item['menu_name']);
}
break;
case 'delete':
menu_link_delete(NULL, $link_path);
break;
}
}
/**
* Find 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) {
$i = 1;
$match = '';
$args[] = $item['menu_name'];
$p = 'p1';
while ($i <= MENU_MAX_DEPTH && $item[$p]) {
$match .= " AND $p = %d";
$args[] = $item[$p];
$p = 'p'. ++$i;
}
$max_depth = db_result(db_query_range("SELECT depth FROM {menu_links} WHERE menu_name = '%s'". $match ." ORDER BY depth DESC", $args, 0, 1));
return ($max_depth > $item['depth']) ? $max_depth - $item['depth'] : 0;
}
/**
* Update the children of a menu link that's being moved.
*
* The menu name, parents (p1 - p6), and depth are updated for all children of
* the link, and the has_children status of the previous parent is updated.
*/
function _menu_link_move_children($item, $existing_item) {
$args[] = $item['menu_name'];
$set[] = "menu_name = '%s'";
$i = 1;
while ($i <= $item['depth']) {
$p = 'p'. $i++;
$set[] = "$p = %d";
$args[] = $item[$p];
}
$j = $existing_item['depth'] + 1;
while ($i <= MENU_MAX_DEPTH && $j <= MENU_MAX_DEPTH) {
$set[] = 'p'. $i++ .' = p'. $j++;
}
while ($i <= MENU_MAX_DEPTH) {
$set[] = 'p'. $i++ .' = 0';
}
$shift = $item['depth'] - $existing_item['depth'];
if ($shift < 0) {
$args[] = -$shift;
$set[] = 'depth = depth - %d';
}
elseif ($shift > 0) {
// The order of $set 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
$set = array_reverse($set);
$args = array_reverse($args);
$args[] = $shift;
$set[] = 'depth = depth + %d';
}
$where[] = "menu_name = '%s'";
$args[] = $existing_item['menu_name'];
$p = 'p1';
for ($i = 1; $i <= MENU_MAX_DEPTH && $existing_item[$p]; $p = 'p'. ++$i) {
$where[] = "$p = %d";
$args[] = $existing_item[$p];
}
db_query("UPDATE {menu_links} SET ". implode(', ', $set) ." WHERE ". implode(' AND ', $where), $args);
// Check the has_children status of the parent, while excluding this item.
_menu_update_parental_status($existing_item, TRUE);
}
/**
* Check and update 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']) {
// We may want to exclude the passed link as a possible child.
$where = $exclude ? " AND mlid != %d" : '';
// Check if at least one visible child exists in the table.
$parent_has_children = (bool)db_result(db_query_range("SELECT mlid FROM {menu_links} WHERE menu_name = '%s' AND plid = %d AND hidden = 0". $where, $item['menu_name'], $item['plid'], $item['mlid'], 0, 1));
db_query("UPDATE {menu_links} SET has_children = %d WHERE mlid = %d", $parent_has_children, $item['plid']);
}
}
/**
* Helper function that sets the p1..p9 values for a menu link being saved.
*/
function _menu_link_parents_set(&$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;
}
}
/**
* Helper function to build 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.
$menu = array();
foreach ($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) {
$match = FALSE;
// Look for wildcards in the form allowed to be used in PHP functions,
// because we are using these to construct the load function names.
// See http://php.net/manual/en/language.functions.php for reference.
if (preg_match('/^%(|[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)$/', $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;
$item['load_functions'] = empty($load_functions) ? '' : serialize($load_functions);
$item['to_arg_functions'] = empty($to_arg_functions) ? '' : serialize($to_arg_functions);
$item += array(
'title' => '',
'weight' => 0,
'type' => MENU_NORMAL_ITEM,
'_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, $menu);
if (!$menu) {
// We must have a serious error - there is no data to save.
watchdog('php', 'Menu router rebuild failed - some paths may not work correctly.', array(), WATCHDOG_ERROR);
return array();
}
// Delete the existing router since we have some data to replace it.
db_query('DELETE FROM {menu_router}');
// Apply inheritance rules.
foreach ($menu as $path => $v) {
$item = &$menu[$path];
if (!$item['_tab']) {
// Non-tab items.
$item['tab_parent'] = '';
$item['tab_root'] = $path;
}
for ($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 (!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']) && isset($parent['file'])) {
$item['file'] = $parent['file'];
}
if (!isset($item['file path']) && isset($parent['file path'])) {
$item['file path'] = $parent['file path'];
}
}
}
}
if (!isset($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 += array(
'access arguments' => array(),
'access callback' => '',
'page arguments' => array(),
'page callback' => '',
'block callback' => '',
'title arguments' => array(),
'title callback' => 't',
'description' => '',
'position' => '',
'tab_parent' => '',
'tab_root' => $path,
'path' => $path,
'file' => '',
'file path' => '',
'include file' => '',
'module' => '',
);
// Calculate out the file to be included for each callback, if any.
if ($item['file']) {
$file_path = $item['file path'] ? $item['file path'] : drupal_get_path('module', $item['module']);
$item['include file'] = $file_path .'/'. $item['file'];
}
$title_arguments = $item['title arguments'] ? serialize($item['title arguments']) : '';
db_query("INSERT INTO {menu_router}
(path, load_functions, to_arg_functions, access_callback,
access_arguments, page_callback, page_arguments, fit,
number_parts, tab_parent, tab_root,
title, title_callback, title_arguments,
type, block_callback, description, position, weight, file)
VALUES ('%s', '%s', '%s', '%s',
'%s', '%s', '%s', %d,
%d, '%s', '%s',
'%s', '%s', '%s',
%d, '%s', '%s', '%s', %d, '%s')",
$path, $item['load_functions'], $item['to_arg_functions'], $item['access callback'],
serialize($item['access arguments']), $item['page callback'], serialize($item['page arguments']), $item['_fit'],
$item['_number_parts'], $item['tab_parent'], $item['tab_root'],
$item['title'], $item['title callback'], $title_arguments,
$item['type'], $item['block callback'], $item['description'], $item['position'], $item['weight'], $item['include file']);
}
// Sort the masks so they are in order of descending fit, and store them.
$masks = array_keys($masks);
rsort($masks);
variable_set('menu_masks', $masks);
return $menu;
}
/**
* Returns TRUE if a path is external (e.g. http://example.com).
*/
function menu_path_is_external($path) {
$colonpos = strpos($path, ':');
return $colonpos !== FALSE && !preg_match('![/?#]!', substr($path, 0, $colonpos)) && filter_xss_bad_protocol($path, FALSE) == check_plain($path);
}
/**
* Checks whether the site is off-line for maintenance.
*
* This function will log the current user out and redirect to front page
* if the current user has no 'administer site configuration' permission.
*
* @return
* FALSE if the site is not off-line or its the login page or the user has
* 'administer site configuration' permission.
* TRUE for anonymous users not on the login page if the site is off-line.
*/
function _menu_site_is_offline() {
// Check if site is set to off-line mode.
if (variable_get('site_offline', 0)) {
// Check if the user has administration privileges.
if (user_access('administer site configuration')) {
// Ensure that the off-line message is displayed only once [allowing for
// page redirects], and specifically suppress its display on the site
// maintenance page.
if (drupal_get_normal_path($_GET['q']) != 'admin/settings/site-maintenance') {
drupal_set_message(l(t('Operating in off-line mode.'), 'admin/settings/site-maintenance'), 'status', FALSE);
}
}
else {
// Anonymous users get a FALSE at the login prompt, TRUE otherwise.
if (user_is_anonymous()) {
return $_GET['q'] != 'user' && $_GET['q'] != 'user/login';
}
// Logged in users are unprivileged here, so they are logged out.
require_once drupal_get_path('module', 'user') .'/user.pages.inc';
user_logout();
}
}
return FALSE;
}
/**
* Validates the path of a menu link being created or edited.
*
* @return
* TRUE if it is a valid path AND the current user has access permission,
* FALSE otherwise.
*/
function menu_valid_path($form_item) {
global $menu_admin;
$item = array();
$path = $form_item['link_path'];
// We indicate that a menu administrator is running the menu access check.
$menu_admin = TRUE;
if ($path == '<front>' || menu_path_is_external($path)) {
$item = array('access' => TRUE);
}
elseif (preg_match('/\/\%/', $path)) {
// Path is dynamic (ie 'user/%'), so check directly against menu_router table.
if ($item = db_fetch_array(db_query("SELECT * FROM {menu_router} where path = '%s' ", $path))) {
$item['link_path'] = $form_item['link_path'];
$item['link_title'] = $form_item['link_title'];
$item['external'] = FALSE;
$item['options'] = '';
_menu_link_translate($item);
}
}
else {
$item = menu_get_item($path);
}
$menu_admin = FALSE;
return $item && $item['access'];
}
/**
* @} End of "defgroup menu".
*/
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