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<?php
// $Id$
/**
* Register a menu item with the menu system.
*/
function menu($path, $title, $callback = NULL, $weight = 0, $hidden = 0) {
global $_list;
// add the menu to the flat list of menu items:
$_list[$path] = array("title" => $title, "callback" => $callback, "weight" => $weight, "hidden" => $hidden);
}
/**
* Returns an array with the menu items that lead to the specied path.
*/
function menu_get_trail($path) {
global $_list;
$trail = array();
while ($path) {
if ($_list[$path]) {
array_unshift($trail, $path);
}
$path = substr($path, 0, strrpos($path, "/"));
}
return $trail;
}
/**
* Returns the path of the active menu item.
*/
function menu_get_active_item() {
global $_list;
static $path;
if (empty($path)) {
$path = $_GET["q"];
while ($path && !$_list[$path]) {
$path = substr($path, 0, strrpos($path, "/"));
}
}
return $path;
}
/**
* Returns the title of the active menu item.
*/
function menu_get_active_title() {
global $_list;
if ($path = menu_get_active_item()) {
return ucfirst($_list[$path]["title"]);
}
}
/**
* Returns the help associated with the active menu item.
*/
function menu_get_active_help() {
$path = $_GET["q"];
$output = "";
$return = module_invoke_all("help", $path);
foreach ($return as $item) {
if (!empty($item)) {
$output .= $item ."\n";
}
}
return $output;
}
/**
* Returns an array of rendered menu items in the active breadcrumb trail.
*/
function menu_get_active_breadcrumb() {
$links[] = l(t("Home"), "");
$trail = menu_get_trail($_GET["q"]);
foreach ($trail as $item) {
$links[] = _render_item($item);
}
return $links;
}
/**
* Execute the handler associated with the active menu item.
*/
function menu_execute_active_handler() {
global $_list;
$path = menu_get_active_item();
if ($_list[$path]["callback"]) {
$arg = substr($_GET["q"], strlen($path) + 1);
if (empty($arg)) {
return call_user_func($_list[$path]["callback"]);
}
else {
return call_user_func_array($_list[$path]["callback"], explode("/", $arg));
}
}
}
/**
* Returns true when the path is in the active trail.
*/
function menu_in_active_trail($path) {
static $trail;
if (empty($trail)) {
$trail = menu_get_trail($_GET["q"]);
}
return in_array($path, $trail);
}
/**
* Returns a rendered menu tree.
*/
function menu_tree($parent = "") {
global $_list;
static $trail;
if (empty($trail)) {
$trail = menu_get_trail($_GET["q"]);
}
if ($_list[$parent]["children"]) {
$output = "";
usort($_list[$parent]["children"], "_menu_sort");
foreach ($_list[$parent]["children"] as $item) {
/*
** Don't render the menu when it is hidden, or when it has no call-back
** nor children. The latter check avoids that useless links are being
** rendered.
*/
if ($_list[$item]["hidden"] == 0 && ($_list[$item]["callback"] || $_list[$item]["children"])) {
$style = ($_list[$item]["children"] ? (menu_in_active_trail($item) ? "expanded" : "collapsed") : "leaf");
$output .= "<li class=\"$style\">";
$output .= _render_item($item);
if (menu_in_active_trail($item)) {
$output .= menu_tree($item);
}
$output .= "</li>\n";
}
}
if ($output != '') {
$output = "\n<ul>\n$output\n</ul>\n";
}
}
return $output;
}
/**
* Query to module to build the menu.
*/
function menu_build($type) {
/*
** Build a sequential list of all menus items.
*/
module_invoke_all("link", $type);
/*
** Tree-ify the sequential list of menu items by adding each
** menu item to the 'children' array of their direct parent.
*/
global $_list;
foreach ($_list as $path => $data) {
/*
** Find $path's direct parent:
*/
$parent = $path;
do {
$parent = substr($parent, 0, strrpos($parent, "/"));
}
while ($parent && !$_list[$parent]);
if ($path) {
$_list[$parent]["children"][] = $path;
}
}
}
function _menu_sort($a, $b) {
global $_list;
$a = &$_list[$a];
$b = &$_list[$b];
return $a["weight"] < $b["weight"] ? -1 : ($a["weight"] > $b["weight"] ? 1 : ($a["title"] < $b["title"] ? -1 : 1));
}
function _render_item($path) {
global $_list;
if ($path == $_GET["q"]) {
$css = " class=\"active\"";
}
return "<a href=\"". url($path) ."\"$css>". $_list[$path]["title"] ."</a>";
}
?>
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