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<?php
/*
* Session Management for PHP3
*
* Copyright (c) 1999 NetUSE GmbH
* Kristian Koehntopp
*
* $Id: menu.inc,v 1.4 1999/10/28 22:13:16 kk Exp $
*
*/
class Menu {
# Map of PHP_SELF URL strings to menu positions
var $urlmap = array();
# current menu position
var $map = "";
# Information about each menu item
var $item = array();
# $children["/"] = array("/1", "/2");
var $children = array();
# $visible[1] = "/1";
var $visible = array();
# Set true if you do not want to see the main menu
var $nomain = false;
/***************************************************************************/
/* public: constructor
*/
function Menu() {
$this->setup();
}
/* public: show current menu
*/
function show() {
print $this->get();
}
function get() {
global $PHP_SELF;
# Determine normalized current position in tree
$this->map = $this->normalize_pos($PHP_SELF);
# Determine menu levels up from current position
$r = $this->split_path($this->map);
# set up the visible menu items
$this->find_visible($r);
# create them
$str = "";
$start = $this->nomain?1:0;
$len = count($this->visible);
$oldlevel = 0;
$str .= $this->start_menu();
for($i=$start; $i<$len; $i++) {
$level = count(explode("/", $this->visible[$i]));
if ($level > $oldlevel)
$str .= $this->shift_in($oldlevel, $level);
if ($level < $oldlevel)
$str .= $this->shift_out($oldlevel, $level);
$oldlevel = $level;
$str .= $this->get_cell($i, $level);
}
$str .= $this->end_menu();
return $str;
}
/* public: show a single menu cell
*/
function get_cell($n, $level) {
$bold = ($this->visible[$n] == $this->map);
for ($i=1; $i<$level; $i++)
$dent .= " ";
$str = sprintf("%s<a href=%s>%s%s%s</a><br>\n",
$dent,
$this->item[$this->visible[$n]]["url"],
$bold?"<b>":"",
$this->item[$this->visible[$n]]["title"],
$bold?"</b>":""
);
return $str;
}
function shift_in($oldlevel, $level) { ; }
function shift_out($oldlevel, $level) { ; }
function start_menu() { ; }
function end_menu() { ; }
/***************************************************************************/
/* private: normalize current menu position
*/
function normalize_pos($pos) {
$m = $pos;
while(substr($m, 0, 1)) {
if ($this->urlmap[$m])
break;
$m = dirname($m);
}
return $this->urlmap[$m];
}
/* private: split a path /2/2 into components "", /2, /2/2
*/
function split_path($p) {
$path = "";
$r = explode("/", $p);
reset($r);
while(list($k, $v) = each($r)) {
if ($v)
$path .= "/$v";
$res[] = $path;
}
return $res;
}
/* private: set up the visible array.
*/
function find_visible($r) {
# at each level, add current children to visible
$len = count($r);
$this->visible= array();
for ($i=0; $i<$len; $i++) {
# if current level has children, add them...
if (is_array($this->children[$r[$i]])) {
reset($this->children[$r[$i]]);
while(list($k, $v) = each($this->children[$r[$i]]))
$this->visible[] = $v;
}
}
# Order menu items for display
sort($this->visible);
}
/* private: find children of each menu item
*/
function setup() {
reset($this->urlmap);
while(list($k, $v) = each($this->urlmap)) {
$base = dirname($v);
$this->children[$base][] = $v;
$this->item[$v]["url"] = $k;
}
}
}
?>
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