Extension:TreeNav.php

<?php /**

* TreeNav extension - Adds navigation to pages which are part of the sidebar tree
* Template:Php

These are the MediaWiki extensions we're using and/or developing. Please refer to the information on the mediawiki.org wiki for installation and usage details. Extensions here which have no corresponding mediawiki article are either not ready for use or have been superseded. You can also browse our extension code in our local Subversion repository or our GitHub mirror.

* See http://www.organicdesign.co.nz/Extension:TreeNav.php for installation and usage details
*
* @package MediaWiki
* @subpackage Extensions
* @author User:Nad
* @copyright © 2007 User:Nad
* @licence GNU General Public Licence 2.0 or later
*/

if (!defined('MEDIAWIKI')) die('Not an entry point.');

define('TREENAV_VERSION', '0.0.0, 2009-02-14');

$egTreeNavArticle = 'MediaWiki:Sidebar';

$wgExtensionFunctions[] = 'efSetupTreeNav';

$wgExtensionCredits['parserhook'][] = array( 'name' => 'TreeNav', 'author' => 'User:Nad', 'description' => 'Adds navigation to pages which are part of the sidebar tree', 'url' => 'http://www.organicdesign.co.nz/Extension:TreeNav.php', 'version' => TREENAV_VERSION );

class TreeNav {

function __construct() { global $wgHooks; $wgHooks['OutputPageBeforeHTML'][] = $this; }

/** * Add the features to the rendered page */ function onOutputPageBeforeHTML(&$out, &$text) { global $wgTitle, $wgUser, $egTreeNavArticle, $wgParser; $tree = new Article(Title::newFromText($egTreeNavArticle)); $tree = $tree->getContent(); if (preg_match('|\{\{#tree:.+?^(\*.+)\}\}|sm', $tree, $m)) $tree = $m[1]; $tree = $wgParser->preprocess($tree, $wgTitle, new ParserOptions()); if (preg_match_all('|^\s*(\*+)\s*\[\[\s*(.+?)\s*(\|\s*(.+?))?\]\]|m', $tree, $m)) { list(, $depths, $titles,, $anchors) = $m;

# Find first location of current title if ($i = array_search($wgTitle->getPrefixedText(), $titles)) {

# Calculate prev and next $prev = $i > 0 ? $i-1 : false; #if ($depths[$prev] < $depths[$i]) $prev = false; # disable prev if it goes to parent $prev = $prev ? $wgUser->getSkin()->makeLinkObj(Title::newFromText($titles[$prev]), 'Prev') : 'Prev'; $next = $i < count($titles)-1 ? $i+1 : false; $next = $next ? $wgUser->getSkin()->makeLinkObj(Title::newFromText($titles[$next]), 'Next') : 'Next';

# Build path $path = array(); $ld = 100; for ($j = $i; $j > 0; $j--) { $depth = strlen($depths[$j]); if ($depth < $ld) { $ld = $depth; $k = $i == $j ? $j : $j; $title = Title::newFromText($titles[$k]); $anchor = $anchors[$k] ? $anchors[$k] : $title->getPrefixedText(); array_unshift($path, $wgUser->getSkin()->makeLinkObj($title, $anchor)); } }

# Render information $path = join('>', $path);

$text = "

$path

$prev

$next

$text";

} } return true; }

function __toString() { return __CLASS__; }

}

/**

* Called from $wgExtensionFunctions array when initialising extensions
*/

function efSetupTreeNav() { global $egTreeNav; $egegTreeNav = new TreeNav(); }