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<?php
/**
* Generates a HTML menu from a multidimensional hash
*
* PHP versions 4 and 5
*
* LICENSE: This source file is subject to version 3.01 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_01.txt If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category HTML
* @package HTML_Menu
* @author Ulf Wendel <ulf.wendel@phpdoc.de>
* @author Sebastian Bergmann <sb@sebastian-bergmann.de>
* @author Alexey Borzov <avb@php.net>
* @copyright 2001-2007 The PHP Group
* @license http://www.php.net/license/3_01.txt PHP License 3.01
* @version CVS: $Id: Menu.php,v 1.15 2007/05/18 20:54:33 avb Exp $
* @link http://pear.php.net/package/HTML_Menu
*/
/**#@+
* Constants for menu entry types
*/
define('HTML_MENU_ENTRY_INACTIVE', 0);
define('HTML_MENU_ENTRY_ACTIVE', 1);
define('HTML_MENU_ENTRY_ACTIVEPATH', 2);
define('HTML_MENU_ENTRY_PREVIOUS', 3);
define('HTML_MENU_ENTRY_NEXT', 4);
define('HTML_MENU_ENTRY_UPPER', 5);
define('HTML_MENU_ENTRY_BREADCRUMB', 6); // like activepath, but for 'urhere' type
/**#@-*/
/**
* Generates a HTML menu from a multidimensional hash.
*
* Special thanks to the original author: Alex Vorobiev <sasha@mathforum.com>.
*
* @category HTML
* @package HTML_Menu
* @author Ulf Wendel <ulf.wendel@phpdoc.de>
* @author Alexey Borzov <avb@php.net>
* @version Release: 2.1.4
*/
class HTML_Menu
{
/**#@+
* @access private
*/
/**
* Menu structure as a multidimensional hash.
* @var array
* @see setMenu(), Menu()
*/
var $_menu = array();
/**
* Mapping from URL to menu path.
* @var array
* @see getPath()
*/
var $_urlMap = array();
/**
* Path to the current menu item.
* @var array
* @see get(), getPath()
*/
var $_path = array();
/**
* Menu type: tree, rows, you-are-here.
* @var array
* @see setMenuType()
*/
var $_menuType = 'tree';
/**
* URL Environment Variable
* @var string
*/
var $_urlEnvVar = 'PHP_SELF';
/**
* The URL to use an URL for the current page, instead of the one normally
* taken from env. variables
* @var string
* @see forceCurrentUrl(), getCurrentUrl()
*/
var $_forcedUrl = '';
/**
* Index of the menu item that should be made "current"
* @var mixed
* @see forceCurrentIndex()
*/
var $_forcedIndex = null;
/**
* URL of the current page.
* @see getCurrentURL(), getPath()
*/
var $_currentUrl = '';
/**
* The renderer being used to output the menu
* @var HTML_Menu_Renderer
* @see render()
*/
var $_renderer = null;
/**
* Prefix for menu URLs
* @var string
* @see setUrlPrefix()
*/
var $_urlPrefix = '';
/**#@-*/
/**
* Initializes the menu, sets the type and menu structure.
*
* @param array menu structure
* @param string menu type
* @param string env. variable used to determine current URL
* @see setMenuType(), setMenu(), setURLEnvVar()
*/
function HTML_Menu($menu = null, $type = 'tree', $urlEnvVar = 'PHP_SELF')
{
if (is_array($menu)) {
$this->setMenu($menu);
}
$this->setMenuType($type);
$this->setURLEnvVar($urlEnvVar);
}
/**
* Sets the menu structure.
*
* The menu structure is defined by a multidimensional hash. This is
* quite "dirty" but simple and easy to traverse. An example
* show the structure. To get the following menu:
*
* <pre>
* 1 - Projects
* 11 - Projects => PHPDoc
* 12 - Projects => Forms
* 2 - Stuff
* </pre>
*
* you need the array:
*
* <pre>
* $menu = array(
* 1 => array(
* 'title' => 'Projects',
* 'url' => '/projects/index.php',
* 'sub' => array(
* 11 => array(
* 'title' => 'PHPDoc',
* ...
* ),
* 12 => array( ... ),
* )
* ),
* 2 => array( 'title' => 'Stuff', 'url' => '/stuff/index.php' )
* )
* </pre>
*
* Note the index 'sub' and the nesting. Note also that 1, 11, 12, 2
* must be unique. The class uses them as ID's.
*
* @param array
* @access public
*/
function setMenu($menu)
{
$this->_menu = $menu;
$this->_urlMap = array();
}
/**
* Sets the type of the menu.
*
* Available types are: 'tree', 'rows', 'urhere', 'prevnext', 'sitemap'.
*
* @param string type name
* @access public
*/
function setMenuType($menuType)
{
$menuType = strtolower($menuType);
if (in_array($menuType, array('tree', 'rows', 'urhere', 'prevnext', 'sitemap'))) {
$this->_menuType = $menuType;
} else {
$this->_menuType = 'tree';
}
}
/**
* Sets the environment variable to use to get the current URL.
*
* @param string environment variable for current URL
* @access public
*/
function setURLEnvVar($urlEnvVar)
{
$this->_urlEnvVar = $urlEnvVar;
}
/**
* Returns the HTML menu.
*
* @param string Menu type: tree, urhere, rows, prevnext, sitemap
* @return string HTML of the menu
* @access public
* @see render()
*/
function get($menuType = '')
{
include_once 'HTML/Menu/DirectRenderer.php';
$renderer =& new HTML_Menu_DirectRenderer();
$this->render($renderer, $menuType);
return $renderer->toHtml();
}
/**
* Prints the HTML menu.
*
* @access public
* @param string Menu type: tree, urhere, rows, prevnext, sitemap
* @see get(), render()
*/
function show($menuType = '')
{
print $this->get($menuType);
}
/**
* Renders the menu.
*
* @access public
* @param HTML_Menu_Renderer Renderer to use
* @param string Type of the menu
* @throws PEAR_Error
*/
function render(&$renderer, $menuType = '')
{
if ('' != $menuType) {
$this->setMenuType($menuType);
}
$this->_renderer =& $renderer;
// the renderer will throw an error if it is unable to process this menu type
$res = $this->_renderer->setMenuType($this->_menuType);
if (is_object($res) && is_a($res, 'PEAR_Error')) {
return $res;
}
// storing to a class variable saves some recursion overhead
$this->_path = $this->getPath();
switch ($this->_menuType) {
case 'rows':
$this->_renderRows($this->_menu);
break;
case 'prevnext':
$this->_renderPrevNext($this->_menu);
break;
case 'urhere':
$this->_renderURHere($this->_menu);
break;
default:
$this->_renderTree($this->_menu);
} // switch
}
/**
* Finds the type for the node.
*
* @access private
* @param mixed Node id
* @param string Node 'url' attribute
* @param int Level in the tree
* @return int Node type (one of HTML_MENU_ENTRY_* constants)
*/
function _findNodeType($nodeId, &$nodeUrl, $level)
{
$nodeUrl = $this->_prefixUrl($nodeUrl);
if ($this->_currentUrl == $nodeUrl) {
// menu item that fits to this url - 'active' menu item
return HTML_MENU_ENTRY_ACTIVE;
} elseif (isset($this->_path[$level]) && $this->_path[$level] == $nodeId) {
// processed menu item is part of the path to the active menu item
return 'urhere' == $this->_menuType? HTML_MENU_ENTRY_BREADCRUMB: HTML_MENU_ENTRY_ACTIVEPATH;
} else {
// not selected, not a part of the path to the active menu item
return HTML_MENU_ENTRY_INACTIVE;
}
}
/**
* Renders the tree menu ('tree' and 'sitemap')
*
* @access private
* @param array (sub)menu being rendered
* @param int current depth in the tree structure
*/
function _renderTree($menu, $level = 0)
{
foreach ($menu as $node_id => $node) {
$type = $this->_findNodeType($node_id, $node['url'], $level);
$this->_renderer->renderEntry($node, $level, $type);
$this->_renderer->finishRow($level);
// follow the subtree if the active menu item is in it or if we
// want the full menu or if node expansion is forced (request #4391)
if (isset($node['sub']) && ('sitemap' == $this->_menuType ||
HTML_MENU_ENTRY_INACTIVE != $type || !empty($node['forceExpand']))) {
$this->_renderTree($node['sub'], $level + 1);
}
}
$this->_renderer->finishLevel($level);
if (0 == $level) {
$this->_renderer->finishMenu($level);
}
}
/**
* Renders the 'urhere' menu
*
* @access private
* @param array (sub)menu being rendered
* @param int current depth in the tree structure
*/
function _renderURHere($menu, $level = 0)
{
foreach ($menu as $node_id => $node) {
$type = $this->_findNodeType($node_id, $node['url'], $level);
if (HTML_MENU_ENTRY_INACTIVE != $type) {
$this->_renderer->renderEntry($node, $level, $type);
// follow the subtree if the active menu item is in it
if (isset($node['sub'])) {
$this->_renderURHere($node['sub'], $level + 1);
}
}
}
if (0 == $level) {
$this->_renderer->finishRow($level);
$this->_renderer->finishMenu($level);
}
}
/**
* Renders the 'rows' menu
*
* @access private
* @param array (sub)menu being rendered
* @param int current depth in the tree structure
*/
function _renderRows($menu, $level = 0)
{
$submenu = false;
foreach ($menu as $node_id => $node) {
$type = $this->_findNodeType($node_id, $node['url'], $level);
$this->_renderer->renderEntry($node, $level, $type);
// follow the subtree if the active menu item is in it
if (HTML_MENU_ENTRY_INACTIVE != $type && isset($node['sub'])) {
$submenu = $node['sub'];
}
}
// every (sub)menu has its own table
$this->_renderer->finishRow($level);
$this->_renderer->finishMenu($level);
// go deeper if neccessary
if ($submenu) {
$this->_renderRows($submenu, $level + 1);
}
}
/**
* Renders the 'prevnext' menu
*
* @access private
* @param array (sub)menu being rendered
* @param int current depth in the tree structure
* @param int flag indicating whether to finish processing
* (0 - continue, 1 - this is "next" node, 2 - stop)
*/
function _renderPrevNext($menu, $level = 0, $flagStop = 0)
{
static $last_node = array(), $up_node = array();
foreach ($menu as $node_id => $node) {
if (0 != $flagStop) {
// add this item to the menu and stop recursion - (next >>) node
if ($flagStop == 1) {
$node['url'] = $this->_prefixUrl($node['url']);
$this->_renderer->renderEntry($node, $level, HTML_MENU_ENTRY_NEXT);
$flagStop = 2;
}
break;
} else {
$type = $this->_findNodeType($node_id, $node['url'], $level);
if (HTML_MENU_ENTRY_ACTIVE == $type) {
$flagStop = 1;
// WARNING: if there's no previous take the first menu entry - you might not like this rule!
if (0 == count($last_node)) {
reset($this->_menu);
list($node_id, $last_node) = each($this->_menu);
$last_node['url'] = $this->_prefixUrl($last_node['url']);
}
$this->_renderer->renderEntry($last_node, $level, HTML_MENU_ENTRY_PREVIOUS);
// WARNING: if there's no up take the first menu entry - you might not like this rule!
if (0 == count($up_node)) {
reset($this->_menu);
list($node_id, $up_node) = each($this->_menu);
$up_node['url'] = $this->_prefixUrl($up_node['url']);
}
$this->_renderer->renderEntry($up_node, $level, HTML_MENU_ENTRY_UPPER);
}
}
// remember the last (<< prev) node
$last_node = $node;
if (isset($node['sub'])) {
if (HTML_MENU_ENTRY_INACTIVE != $type) {
$up_node = $node;
}
$flagStop = $this->_renderPrevNext($node['sub'], $level + 1, $flagStop);
}
}
if (0 == $level) {
$this->_renderer->finishRow($level);
$this->_renderer->finishMenu($level);
}
return $flagStop;
}
/**
* Returns the path of the current page in the menu 'tree'.
*
* @return array path to the selected menu item
* @see _buildUrlMap(), $_urlMap
*/
function getPath()
{
$this->_currentUrl = $this->getCurrentURL();
$this->_buildUrlMap($this->_menu, array());
// If there is no match for the current URL, try to come up with
// the best approximation by shortening the url
while ($this->_currentUrl && !isset($this->_urlMap[$this->_currentUrl])) {
$this->_currentUrl = substr($this->_currentUrl, 0, -1);
}
return isset($this->_urlMap[$this->_currentUrl])? $this->_urlMap[$this->_currentUrl]: array();
}
/**
* Builds the mappings from node url to the 'path' in the menu
*
* @access private
* @param array (sub)menu being processed
* @param array path to the (sub)menu
* @return boolean true if the path to the current page was found, otherwise false.
* @see getPath(), $_urlMap
*/
function _buildUrlMap($menu, $path)
{
foreach ($menu as $nodeId => $node) {
$url = $this->_prefixUrl($node['url']);
$this->_urlMap[$url] = $path;
if ($url == $this->_currentUrl) {
return true;
}
if (isset($node['sub']) &&
$this->_buildUrlMap($node['sub'], array_merge($path, array($nodeId)))) {
return true;
}
}
return false;
}
/**
* Returns the URL of the currently selected page.
*
* The returned string is used for all test against the URL's
* in the menu structure hash.
*
* @access public
* @return string
*/
function getCurrentURL()
{
if (!empty($this->_forcedUrl)) {
return $this->_forcedUrl;
} elseif (!empty($this->_forcedIndex)) {
return $this->_findUrlByIndex($this->_menu, $this->_forcedIndex);
} elseif (isset($_SERVER[$this->_urlEnvVar])) {
return $_SERVER[$this->_urlEnvVar];
} elseif (isset($GLOBALS[$this->_urlEnvVar])) {
return $GLOBALS[$this->_urlEnvVar];
} elseif ($env = getenv($this->_urlEnvVar)) {
return $env;
} else {
return '';
}
}
/**
* Forces the given URL to be "current"
*
* @access public
* @param string Url to use
*/
function forceCurrentUrl($url)
{
$this->_forcedUrl = $url;
$this->_forcedIndex = null;
}
/**
* Sets the prefix for the URLs in the menu
*
* @param string
* @access public
*/
function setUrlPrefix($prefix)
{
if (('' != $prefix) && ('/' != substr($prefix, -1))) {
$prefix .= '/';
}
$this->_urlPrefix = $prefix;
}
/**
* Adds the prefix to the URL (see request #2935)
*
* @access private
* @param string URL
* @return string URL with prefix
* @see setUrlPrefix()
*/
function _prefixUrl($url)
{
return $this->_urlPrefix . ((empty($this->_urlPrefix) || '/' != $url{0})? $url: substr($url, 1));
}
/**
* Forces the menu item with the given index to become "current"
*
* Per request #3237
*
* @param mixed Menu item index
* @access public
*/
function forceCurrentIndex($index)
{
$this->_forcedIndex = $index;
$this->_forcedUrl = '';
}
/**
* Returns the 'url' field of the menu item with the given index
*
* @param array Menu structure to search
* @param mixed Index
* @return string URL
* @access private
*/
function _findUrlByIndex(&$menu, $index)
{
foreach (array_keys($menu) as $key) {
if ($key == $index) {
return $menu[$key]['url'];
} elseif (!empty($menu[$key]['sub']) && '' != ($url = $this->_findUrlByIndex($menu[$key]['sub'], $index))) {
return $url;
}
}
return '';
}
}
?>
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