update to MediaWiki 1.16.0

1 files changed, 0 insertions, 1205 deletions

diff --git a/includes/SearchEngine.php b/includes/SearchEngine.php
deleted file mode 100644
index e5392f7c..00000000
--- a/includes/SearchEngine.php
+++ /dev/null
@@ -1,1205 +0,0 @@
-<?php
-/**
- * @defgroup Search Search
- *
- * @file
- * @ingroup Search
- */
-
-/**
- * Contain a class for special pages
- * @ingroup Search
- */
-class SearchEngine {
-	var $limit = 10;
-	var $offset = 0;
-	var $prefix = '';
-	var $searchTerms = array();
-	var $namespaces = array( NS_MAIN );
-	var $showRedirects = false;
-
-	/**
-	 * Perform a full text search query and return a result set.
-	 * If title searches are not supported or disabled, return null.
-	 *
-	 * @param string $term - Raw search term
-	 * @return SearchResultSet
-	 * @access public
-	 * @abstract
-	 */
-	function searchText( $term ) {
-		return null;
-	}
-
-	/**
-	 * Perform a title-only search query and return a result set.
-	 * If title searches are not supported or disabled, return null.
-	 *
-	 * @param string $term - Raw search term
-	 * @return SearchResultSet
-	 * @access public
-	 * @abstract
-	 */
-	function searchTitle( $term ) {
-		return null;
-	}
-	
-	/** If this search backend can list/unlist redirects */
-	function acceptListRedirects() {
-		return true;
-	}
-	
-	/**
-	 * Transform search term in cases when parts of the query came as different GET params (when supported)
-	 * e.g. for prefix queries: search=test&prefix=Main_Page/Archive -> test prefix:Main Page/Archive
-	 */
-	function transformSearchTerm( $term ) {
-		return $term;
-	}
-	
-	/**
-	 * If an exact title match can be find, or a very slightly close match,
-	 * return the title. If no match, returns NULL.
-	 *
-	 * @param string $term
-	 * @return Title
-	 */
-	public static function getNearMatch( $searchterm ) {
-		global $wgContLang;
-
-		$allSearchTerms = array($searchterm);
-
-		if($wgContLang->hasVariants()){
-			$allSearchTerms = array_merge($allSearchTerms,$wgContLang->convertLinkToAllVariants($searchterm));
-		}
-
-		foreach($allSearchTerms as $term){
-
-			# Exact match? No need to look further.
-			$title = Title::newFromText( $term );
-			if (is_null($title))
-				return NULL;
-
-			if ( $title->getNamespace() == NS_SPECIAL || $title->isExternal() || $title->exists() ) {
-				return $title;
-			}
-			
-			# See if it still otherwise has content is some sane sense
-			$article = MediaWiki::articleFromTitle( $title );
-			if( $article->hasViewableContent() ) {
-				return $title;
-			}
-
-			# Now try all lower case (i.e. first letter capitalized)
-			#
-			$title = Title::newFromText( $wgContLang->lc( $term ) );
-			if ( $title && $title->exists() ) {
-				return $title;
-			}
-
-			# Now try capitalized string
-			#
-			$title = Title::newFromText( $wgContLang->ucwords( $term ) );
-			if ( $title && $title->exists() ) {
-				return $title;
-			}
-
-			# Now try all upper case
-			#
-			$title = Title::newFromText( $wgContLang->uc( $term ) );
-			if ( $title && $title->exists() ) {
-				return $title;
-			}
-
-			# Now try Word-Caps-Breaking-At-Word-Breaks, for hyphenated names etc
-			$title = Title::newFromText( $wgContLang->ucwordbreaks($term) );
-			if ( $title && $title->exists() ) {
-				return $title;
-			}
-
-			// Give hooks a chance at better match variants
-			$title = null;
-			if( !wfRunHooks( 'SearchGetNearMatch', array( $term, &$title ) ) ) {
-				return $title;
-			}
-		}
-
-		$title = Title::newFromText( $searchterm );
-
-		# Entering an IP address goes to the contributions page
-		if ( ( $title->getNamespace() == NS_USER && User::isIP($title->getText() ) )
-			|| User::isIP( trim( $searchterm ) ) ) {
-			return SpecialPage::getTitleFor( 'Contributions', $title->getDBkey() );
-		}
-
-
-		# Entering a user goes to the user page whether it's there or not
-		if ( $title->getNamespace() == NS_USER ) {
-			return $title;
-		}
-
-		# Go to images that exist even if there's no local page.
-		# There may have been a funny upload, or it may be on a shared
-		# file repository such as Wikimedia Commons.
-		if( $title->getNamespace() == NS_FILE ) {
-			$image = wfFindFile( $title );
-			if( $image ) {
-				return $title;
-			}
-		}
-
-		# MediaWiki namespace? Page may be "implied" if not customized.
-		# Just return it, with caps forced as the message system likes it.
-		if( $title->getNamespace() == NS_MEDIAWIKI ) {
-			return Title::makeTitle( NS_MEDIAWIKI, $wgContLang->ucfirst( $title->getText() ) );
-		}
-
-		# Quoted term? Try without the quotes...
-		$matches = array();
-		if( preg_match( '/^"([^"]+)"$/', $searchterm, $matches ) ) {
-			return SearchEngine::getNearMatch( $matches[1] );
-		}
-
-		return NULL;
-	}
-
-	public static function legalSearchChars() {
-		return "A-Za-z_'.0-9\\x80-\\xFF\\-";
-	}
-
-	/**
-	 * Set the maximum number of results to return
-	 * and how many to skip before returning the first.
-	 *
-	 * @param int $limit
-	 * @param int $offset
-	 * @access public
-	 */
-	function setLimitOffset( $limit, $offset = 0 ) {
-		$this->limit = intval( $limit );
-		$this->offset = intval( $offset );
-	}
-
-	/**
-	 * Set which namespaces the search should include.
-	 * Give an array of namespace index numbers.
-	 *
-	 * @param array $namespaces
-	 * @access public
-	 */
-	function setNamespaces( $namespaces ) {
-		$this->namespaces = $namespaces;
-	}
-
-	/**
-	 * Parse some common prefixes: all (search everything)
-	 * or namespace names
-	 *
-	 * @param string $query
-	 */
-	function replacePrefixes( $query ){
-		global $wgContLang;
-
-		if( strpos($query,':') === false )
-			return $query; // nothing to do
-
-		$parsed = $query;
-		$allkeyword = wfMsgForContent('searchall').":";
-		if( strncmp($query, $allkeyword, strlen($allkeyword)) == 0 ){
-			$this->namespaces = null;
-			$parsed = substr($query,strlen($allkeyword));
-		} else if( strpos($query,':') !== false ) {
-			$prefix = substr($query,0,strpos($query,':'));
-			$index = $wgContLang->getNsIndex($prefix);
-			if($index !== false){
-				$this->namespaces = array($index);
-				$parsed = substr($query,strlen($prefix)+1);
-			}
-		}
-		if(trim($parsed) == '')
-			return $query; // prefix was the whole query
-
-		return $parsed;
-	}
-
-	/**
-	 * Make a list of searchable namespaces and their canonical names.
-	 * @return array
-	 */
-	public static function searchableNamespaces() {
-		global $wgContLang;
-		$arr = array();
-		foreach( $wgContLang->getNamespaces() as $ns => $name ) {
-			if( $ns >= NS_MAIN ) {
-				$arr[$ns] = $name;
-			}
-		}
-		return $arr;
-	}
-	
-	/**
-	 * Extract default namespaces to search from the given user's
-	 * settings, returning a list of index numbers.
-	 *
-	 * @param User $user
-	 * @return array
-	 * @static 
-	 */
-	public static function userNamespaces( &$user ) {
-		$arr = array();
-		foreach( SearchEngine::searchableNamespaces() as $ns => $name ) {
-			if( $user->getOption( 'searchNs' . $ns ) ) {
-				$arr[] = $ns;
-			}
-		}
-		return $arr;
-	}
-	
-	/**
-	 * Find snippet highlight settings for a given user
-	 *
-	 * @param User $user
-	 * @return array contextlines, contextchars 
-	 * @static
-	 */
-	public static function userHighlightPrefs( &$user ){
-		//$contextlines = $user->getOption( 'contextlines',  5 );
-		//$contextchars = $user->getOption( 'contextchars', 50 );
-		$contextlines = 2; // Hardcode this. Old defaults sucked. :)
-		$contextchars = 75; // same as above.... :P
-		return array($contextlines, $contextchars);
-	}
-	
-	/**
-	 * An array of namespaces indexes to be searched by default
-	 * 
-	 * @return array 
-	 * @static
-	 */
-	public static function defaultNamespaces(){
-		global $wgNamespacesToBeSearchedDefault;
-		
-		return array_keys($wgNamespacesToBeSearchedDefault, true);
-	}
-	
-	/**
-	 * Get a list of namespace names useful for showing in tooltips
-	 * and preferences
-	 *
-	 * @param unknown_type $namespaces
-	 */
-	public static function namespacesAsText( $namespaces ){
-		global $wgContLang;
-		
-		$formatted = array_map( array($wgContLang,'getFormattedNsText'), $namespaces );
-		foreach( $formatted as $key => $ns ){
-			if ( empty($ns) )
-				$formatted[$key] = wfMsg( 'blanknamespace' );
-		}
-		return $formatted;
-	}
-	
-	/**
-	 * An array of "project" namespaces indexes typically searched
-	 * by logged-in users
-	 * 
-	 * @return array 
-	 * @static
-	 */
-	public static function projectNamespaces() {
-		global $wgNamespacesToBeSearchedDefault, $wgNamespacesToBeSearchedProject;
-		
-		return array_keys( $wgNamespacesToBeSearchedProject, true );
-	}
-	
-	/**
-	 * An array of "project" namespaces indexes typically searched
-	 * by logged-in users in addition to the default namespaces
-	 * 
-	 * @return array 
-	 * @static
-	 */
-	public static function defaultAndProjectNamespaces() {
-		global $wgNamespacesToBeSearchedDefault, $wgNamespacesToBeSearchedProject;
-		
-		return array_keys( $wgNamespacesToBeSearchedDefault + 
-			$wgNamespacesToBeSearchedProject, true);
-	}
-	
-	/**
-	 * Return a 'cleaned up' search string
-	 *
-	 * @return string
-	 * @access public
-	 */
-	function filter( $text ) {
-		$lc = $this->legalSearchChars();
-		return trim( preg_replace( "/[^{$lc}]/", " ", $text ) );
-	}
-	/**
-	 * Load up the appropriate search engine class for the currently
-	 * active database backend, and return a configured instance.
-	 *
-	 * @return SearchEngine
-	 */
-	public static function create() {
-		global $wgSearchType;
-		$dbr = wfGetDB( DB_SLAVE );
-		if( $wgSearchType ) {
-			$class = $wgSearchType;
-		} else {
-			$class = $dbr->getSearchEngine();
-		}
-		$search = new $class( $dbr );
-		$search->setLimitOffset(0,0);
-		return $search;
-	}
-
-	/**
-	 * Create or update the search index record for the given page.
-	 * Title and text should be pre-processed.
-	 *
-	 * @param int $id
-	 * @param string $title
-	 * @param string $text
-	 * @abstract
-	 */
-	function update( $id, $title, $text ) {
-		// no-op
-	}
-
-	/**
-	 * Update a search index record's title only.
-	 * Title should be pre-processed.
-	 *
-	 * @param int $id
-	 * @param string $title
-	 * @abstract
-	 */
-	function updateTitle( $id, $title ) {
-		// no-op
-	}
-	
-	/**
-	 * Get OpenSearch suggestion template
-	 * 
-	 * @return string
-	 * @static 
-	 */
-	public static function getOpenSearchTemplate() {
-		global $wgOpenSearchTemplate, $wgServer, $wgScriptPath;
-		if( $wgOpenSearchTemplate )	{	
-			return $wgOpenSearchTemplate;
-		} else { 
-			$ns = implode( '|', SearchEngine::defaultNamespaces() );
-			if( !$ns ) $ns = "0";
-			return $wgServer . $wgScriptPath . '/api.php?action=opensearch&search={searchTerms}&namespace='.$ns;
-		}
-	}
-	
-	/**
-	 * Get internal MediaWiki Suggest template 
-	 * 
-	 * @return string
-	 * @static
-	 */
-	public static function getMWSuggestTemplate() {
-		global $wgMWSuggestTemplate, $wgServer, $wgScriptPath;
-		if($wgMWSuggestTemplate)		
-			return $wgMWSuggestTemplate;
-		else 
-			return $wgServer . $wgScriptPath . '/api.php?action=opensearch&search={searchTerms}&namespace={namespaces}&suggest';
-	}
-}
-
-/**
- * @ingroup Search
- */
-class SearchResultSet {
-	/**
-	 * Fetch an array of regular expression fragments for matching
-	 * the search terms as parsed by this engine in a text extract.
-	 *
-	 * @return array
-	 * @access public
-	 * @abstract
-	 */
-	function termMatches() {
-		return array();
-	}
-
-	function numRows() {
-		return 0;
-	}
-
-	/**
-	 * Return true if results are included in this result set.
-	 * @return bool
-	 * @abstract
-	 */
-	function hasResults() {
-		return false;
-	}
-
-	/**
-	 * Some search modes return a total hit count for the query
-	 * in the entire article database. This may include pages
-	 * in namespaces that would not be matched on the given
-	 * settings.
-	 *
-	 * Return null if no total hits number is supported.
-	 *
-	 * @return int
-	 * @access public
-	 */
-	function getTotalHits() {
-		return null;
-	}
-
-	/**
-	 * Some search modes return a suggested alternate term if there are
-	 * no exact hits. Returns true if there is one on this set.
-	 *
-	 * @return bool
-	 * @access public
-	 */
-	function hasSuggestion() {
-		return false;
-	}
-
-	/**
-	 * @return string suggested query, null if none
-	 */
-	function getSuggestionQuery(){
-		return null;
-	}
-
-	/**
-	 * @return string HTML highlighted suggested query, '' if none
-	 */
-	function getSuggestionSnippet(){
-		return '';
-	}
-	
-	/**
-	 * Return information about how and from where the results were fetched,
-	 * should be useful for diagnostics and debugging 
-	 *
-	 * @return string
-	 */
-	function getInfo() {
-		return null;
-	}
-	
-	/**
-	 * Return a result set of hits on other (multiple) wikis associated with this one
-	 *
-	 * @return SearchResultSet
-	 */
-	function getInterwikiResults() {
-		return null;
-	}
-	
-	/**
-	 * Check if there are results on other wikis
-	 *
-	 * @return boolean
-	 */
-	function hasInterwikiResults() {
-		return $this->getInterwikiResults() != null;
-	}
-	
-
-	/**
-	 * Fetches next search result, or false.
-	 * @return SearchResult
-	 * @access public
-	 * @abstract
-	 */
-	function next() {
-		return false;
-	}
-
-	/**
-	 * Frees the result set, if applicable.
-	 * @ access public
-	 */
-	function free() {
-		// ...
-	}
-}
-
-
-/**
- * @ingroup Search
- */
-class SearchResultTooMany {
-	## Some search engines may bail out if too many matches are found
-}
-
-
-/**
- * @fixme This class is horribly factored. It would probably be better to have
- * a useful base class to which you pass some standard information, then let
- * the fancy self-highlighters extend that.
- * @ingroup Search
- */
-class SearchResult {
-	var $mRevision = null;
-	var $mImage = null;
-
-	function __construct( $row ) {
-		$this->mTitle = Title::makeTitle( $row->page_namespace, $row->page_title );
-		if( !is_null($this->mTitle) ){
-			$this->mRevision = Revision::newFromTitle( $this->mTitle );
-			if( $this->mTitle->getNamespace() === NS_FILE )
-				$this->mImage = wfFindFile( $this->mTitle );
-		}
-	}
-	
-	/**
-	 * Check if this is result points to an invalid title
-	 *
-	 * @return boolean
-	 * @access public
-	 */
-	function isBrokenTitle(){
-		if( is_null($this->mTitle) )
-			return true;
-		return false;
-	}
-	
-	/**
-	 * Check if target page is missing, happens when index is out of date
-	 * 
-	 * @return boolean
-	 * @access public
-	 */
-	function isMissingRevision(){
-		return !$this->mRevision && !$this->mImage;
-	}
-
-	/**
-	 * @return Title
-	 * @access public
-	 */
-	function getTitle() {
-		return $this->mTitle;
-	}
-
-	/**
-	 * @return double or null if not supported
-	 */
-	function getScore() {
-		return null;
-	}
-
-	/**
-	 * Lazy initialization of article text from DB
-	 */
-	protected function initText(){
-		if( !isset($this->mText) ){
-			if($this->mRevision != null)
-				$this->mText = $this->mRevision->getText();
-			else // TODO: can we fetch raw wikitext for commons images?
-				$this->mText = '';
-			
-		}
-	}
-	
-	/**
-	 * @param array $terms terms to highlight
-	 * @return string highlighted text snippet, null (and not '') if not supported 
-	 */
-	function getTextSnippet($terms){
-		global $wgUser, $wgAdvancedSearchHighlighting;
-		$this->initText();
-		list($contextlines,$contextchars) = SearchEngine::userHighlightPrefs($wgUser);
-		$h = new SearchHighlighter();
-		if( $wgAdvancedSearchHighlighting )
-			return $h->highlightText( $this->mText, $terms, $contextlines, $contextchars );
-		else
-			return $h->highlightSimple( $this->mText, $terms, $contextlines, $contextchars );
-	}
-	
-	/**
-	 * @param array $terms terms to highlight
-	 * @return string highlighted title, '' if not supported
-	 */
-	function getTitleSnippet($terms){
-		return '';
-	}
-
-	/**
-	 * @param array $terms terms to highlight
-	 * @return string highlighted redirect name (redirect to this page), '' if none or not supported
-	 */
-	function getRedirectSnippet($terms){
-		return '';
-	}
-
-	/**
-	 * @return Title object for the redirect to this page, null if none or not supported
-	 */
-	function getRedirectTitle(){
-		return null;
-	}
-
-	/**
-	 * @return string highlighted relevant section name, null if none or not supported
-	 */
-	function getSectionSnippet(){
-		return '';
-	}
-
-	/**
-	 * @return Title object (pagename+fragment) for the section, null if none or not supported
-	 */
-	function getSectionTitle(){
-		return null;
-	}
-
-	/**
-	 * @return string timestamp
-	 */
-	function getTimestamp(){
-		if( $this->mRevision )
-			return $this->mRevision->getTimestamp();
-		else if( $this->mImage )
-			return $this->mImage->getTimestamp();
-		return '';			
-	}
-
-	/**
-	 * @return int number of words
-	 */
-	function getWordCount(){
-		$this->initText();
-		return str_word_count( $this->mText );
-	}
-
-	/**
-	 * @return int size in bytes
-	 */
-	function getByteSize(){
-		$this->initText();
-		return strlen( $this->mText );
-	}
-	
-	/**
-	 * @return boolean if hit has related articles
-	 */
-	function hasRelated(){
-		return false;
-	}
-	
-	/**
-	 * @return interwiki prefix of the title (return iw even if title is broken)
-	 */
-	function getInterwikiPrefix(){
-		return '';
-	}
-}
-
-/**
- * Highlight bits of wikitext
- * 
- * @ingroup Search
- */
-class SearchHighlighter {	
-	var $mCleanWikitext = true;
-	
-	function SearchHighlighter($cleanupWikitext = true){
-		$this->mCleanWikitext = $cleanupWikitext;
-	}
-	
-	/**
-	 * Default implementation of wikitext highlighting
-	 *
-	 * @param string $text
-	 * @param array $terms Terms to highlight (unescaped)
-	 * @param int $contextlines
-	 * @param int $contextchars
-	 * @return string
-	 */
-	public function highlightText( $text, $terms, $contextlines, $contextchars ) {
-		global $wgLang, $wgContLang;
-		global $wgSearchHighlightBoundaries;
-		$fname = __METHOD__;
-		
-		if($text == '')
-			return '';
-				
-		// spli text into text + templates/links/tables
-		$spat = "/(\\{\\{)|(\\[\\[[^\\]:]+:)|(\n\\{\\|)";
-		// first capture group is for detecting nested templates/links/tables/references
-		$endPatterns = array(
-			1 => '/(\{\{)|(\}\})/', // template
-			2 => '/(\[\[)|(\]\])/', // image
-			3 => "/(\n\\{\\|)|(\n\\|\\})/"); // table
-			 
-		// FIXME: this should prolly be a hook or something
-		if(function_exists('wfCite')){
-			$spat .= '|(<ref>)'; // references via cite extension
-			$endPatterns[4] = '/(<ref>)|(<\/ref>)/';
-		}
-		$spat .= '/';
-		$textExt = array(); // text extracts
-		$otherExt = array();  // other extracts
-		wfProfileIn( "$fname-split" );
-		$start = 0;
-		$textLen = strlen($text);
-		$count = 0; // sequence number to maintain ordering
-		while( $start < $textLen ){
-			// find start of template/image/table
-			if( preg_match( $spat, $text, $matches, PREG_OFFSET_CAPTURE, $start ) ){
-				$epat = '';	
-				foreach($matches as $key => $val){
-					if($key > 0 && $val[1] != -1){
-						if($key == 2){
-							// see if this is an image link
-							$ns = substr($val[0],2,-1);
-							if( $wgContLang->getNsIndex($ns) != NS_FILE )
-								break;
-							
-						}
-						$epat = $endPatterns[$key];
-						$this->splitAndAdd( $textExt, $count, substr( $text, $start, $val[1] - $start ) );						
-						$start = $val[1];
-						break;
-					}
-				}
-				if( $epat ){
-					// find end (and detect any nested elements)
-					$level = 0; 
-					$offset = $start + 1;
-					$found = false;
-					while( preg_match( $epat, $text, $endMatches, PREG_OFFSET_CAPTURE, $offset ) ){
-						if( array_key_exists(2,$endMatches) ){
-							// found end
-							if($level == 0){
-								$len = strlen($endMatches[2][0]);
-								$off = $endMatches[2][1];
-								$this->splitAndAdd( $otherExt, $count, 
-									substr( $text, $start, $off + $len  - $start ) );
-								$start = $off + $len;
-								$found = true;
-								break;
-							} else{
-								// end of nested element
-								$level -= 1;
-							}
-						} else{
-							// nested
-							$level += 1;
-						}
-						$offset = $endMatches[0][1] + strlen($endMatches[0][0]);
-					}
-					if( ! $found ){
-						// couldn't find appropriate closing tag, skip
-						$this->splitAndAdd( $textExt, $count, substr( $text, $start, strlen($matches[0][0]) ) );
-						$start += strlen($matches[0][0]);
-					}
-					continue;
-				}
-			}
-			// else: add as text extract
-			$this->splitAndAdd( $textExt, $count, substr($text,$start) );
-			break;
-		}
-		
-		$all = $textExt + $otherExt; // these have disjunct key sets
-		
-		wfProfileOut( "$fname-split" );
-		
-		// prepare regexps
-		foreach( $terms as $index => $term ) {
-			// manually do upper/lowercase stuff for utf-8 since PHP won't do it
-			if(preg_match('/[\x80-\xff]/', $term) ){
-				$terms[$index] = preg_replace_callback('/./us',array($this,'caseCallback'),$terms[$index]);
-			} else {
-				$terms[$index] = $term;
-			}
-		}
-		$anyterm = implode( '|', $terms );
-		$phrase = implode("$wgSearchHighlightBoundaries+", $terms );
-
-		// FIXME: a hack to scale contextchars, a correct solution
-		// would be to have contextchars actually be char and not byte
-		// length, and do proper utf-8 substrings and lengths everywhere,
-		// but PHP is making that very hard and unclean to implement :(
-		$scale = strlen($anyterm) / mb_strlen($anyterm);
-		$contextchars = intval( $contextchars * $scale );
-		
-		$patPre = "(^|$wgSearchHighlightBoundaries)";
-		$patPost = "($wgSearchHighlightBoundaries|$)"; 
-		
-		$pat1 = "/(".$phrase.")/ui";
-		$pat2 = "/$patPre(".$anyterm.")$patPost/ui";
-		
-		wfProfileIn( "$fname-extract" );
-		
-		$left = $contextlines;
-
-		$snippets = array();
-		$offsets = array();		
-		
-		// show beginning only if it contains all words
-		$first = 0;
-		$firstText = '';
-		foreach($textExt as $index => $line){
-			if(strlen($line)>0 && $line[0] != ';' && $line[0] != ':'){
-				$firstText = $this->extract( $line, 0, $contextchars * $contextlines );
-				$first = $index;
-				break;
-			}
-		}
-		if( $firstText ){
-			$succ = true;
-			// check if first text contains all terms
-			foreach($terms as $term){
-				if( ! preg_match("/$patPre".$term."$patPost/ui", $firstText) ){
-					$succ = false;
-					break;
-				}
-			}
-			if( $succ ){
-				$snippets[$first] = $firstText;
-				$offsets[$first] = 0; 
-			}
-		}
-		if( ! $snippets ) {		
-			// match whole query on text 
-			$this->process($pat1, $textExt, $left, $contextchars, $snippets, $offsets);
-			// match whole query on templates/tables/images
-			$this->process($pat1, $otherExt, $left, $contextchars, $snippets, $offsets);
-			// match any words on text
-			$this->process($pat2, $textExt, $left, $contextchars, $snippets, $offsets);
-			// match any words on templates/tables/images
-			$this->process($pat2, $otherExt, $left, $contextchars, $snippets, $offsets);
-			
-			ksort($snippets);
-		}
-		
-		// add extra chars to each snippet to make snippets constant size
-		$extended = array();						
-		if( count( $snippets ) == 0){
-			// couldn't find the target words, just show beginning of article
-			$targetchars = $contextchars * $contextlines;
-			$snippets[$first] = '';
-			$offsets[$first] = 0;
-		} else{
-			// if begin of the article contains the whole phrase, show only that !!	
-			if( array_key_exists($first,$snippets) && preg_match($pat1,$snippets[$first]) 
-			    && $offsets[$first] < $contextchars * 2 ){
-				$snippets = array ($first => $snippets[$first]);
-			}
-			
-			// calc by how much to extend existing snippets
-			$targetchars = intval( ($contextchars * $contextlines) / count ( $snippets ) );
-		}  
-
-		foreach($snippets as $index => $line){
-			$extended[$index] = $line;
-			$len = strlen($line);
-			if( $len < $targetchars - 20 ){
-				// complete this line
-				if($len < strlen( $all[$index] )){
-					$extended[$index] = $this->extract( $all[$index], $offsets[$index], $offsets[$index]+$targetchars, $offsets[$index]);
-					$len = strlen( $extended[$index] );
-				}
-				
-				// add more lines
-				$add = $index + 1;
-				while( $len < $targetchars - 20 
-				       && array_key_exists($add,$all) 
-				       && !array_key_exists($add,$snippets) ){
-				    $offsets[$add] = 0;
-				    $tt = "\n".$this->extract( $all[$add], 0, $targetchars - $len, $offsets[$add] );
-					$extended[$add] = $tt;
-					$len += strlen( $tt );
-					$add++; 					
-				}
-			} 
-		}
-		
-		//$snippets = array_map('htmlspecialchars', $extended);
-		$snippets = $extended;
-		$last = -1;
-		$extract = '';
-		foreach($snippets as $index => $line){
-			if($last == -1) 
-				$extract .= $line; // first line
-			elseif($last+1 == $index && $offsets[$last]+strlen($snippets[$last]) >= strlen($all[$last]))
-				$extract .= " ".$line; // continous lines
-			else
-				$extract .= '<b> ... </b>' . $line;
-
-			$last = $index;
-		}
-		if( $extract )
-			$extract .= '<b> ... </b>';
-		
-		$processed = array();
-		foreach($terms as $term){
-			if( ! isset($processed[$term]) ){
-				$pat3 = "/$patPre(".$term.")$patPost/ui"; // highlight word  
-				$extract = preg_replace( $pat3,
-			  		"\\1<span class='searchmatch'>\\2</span>\\3", $extract );
-				$processed[$term] = true;
-			}
-		}
-		
-		wfProfileOut( "$fname-extract" );
-		
-		return $extract;
-	}
-	
-	/**
-	 * Split text into lines and add it to extracts array
-	 *
-	 * @param array $extracts index -> $line
-	 * @param int $count
-	 * @param string $text
-	 */
-	function splitAndAdd(&$extracts, &$count, $text){
-		$split = explode( "\n", $this->mCleanWikitext? $this->removeWiki($text) : $text );
-		foreach($split as $line){
-			$tt = trim($line);
-			if( $tt )
-				$extracts[$count++] = $tt;
-		}
-	}
-	
-	/**
-	 * Do manual case conversion for non-ascii chars
-	 *
-	 * @param unknown_type $matches
-	 */
-	function caseCallback($matches){
-		global $wgContLang;
-		if( strlen($matches[0]) > 1 ){
-			return '['.$wgContLang->lc($matches[0]).$wgContLang->uc($matches[0]).']';
-		} else
-			return $matches[0];
-	}
-	
-	/**
-	 * Extract part of the text from start to end, but by
-	 * not chopping up words
-	 * @param string $text
-	 * @param int $start
-	 * @param int $end
-	 * @param int $posStart (out) actual start position
-	 * @param int $posEnd (out) actual end position
-	 * @return string  
-	 */
-	function extract($text, $start, $end, &$posStart = null, &$posEnd = null ){
-		global $wgContLang;		
-		
-		if( $start != 0)
-			$start = $this->position( $text, $start, 1 );
-		if( $end >= strlen($text) )
-			$end = strlen($text);
-		else
-			$end = $this->position( $text, $end );
-			
-		if(!is_null($posStart))
-			$posStart = $start;
-		if(!is_null($posEnd))
-			$posEnd = $end;
-		
-		if($end > $start)
-			return substr($text, $start, $end-$start);
-		else
-			return '';
-	} 
-	
-	/**
-	 * Find a nonletter near a point (index) in the text
-	 *
-	 * @param string $text
-	 * @param int $point
-	 * @param int $offset to found index
-	 * @return int nearest nonletter index, or beginning of utf8 char if none
-	 */
-	function position($text, $point, $offset=0 ){
-		$tolerance = 10;
-		$s = max( 0, $point - $tolerance );
-		$l = min( strlen($text), $point + $tolerance ) - $s;
-		$m = array();
-		if( preg_match('/[ ,.!?~!@#$%^&*\(\)+=\-\\\|\[\]"\'<>]/', substr($text,$s,$l), $m, PREG_OFFSET_CAPTURE ) ){
-			return $m[0][1] + $s + $offset;
-		} else{
-			// check if point is on a valid first UTF8 char
-			$char = ord( $text[$point] );
-			while( $char >= 0x80 && $char < 0xc0 ) {
-				// skip trailing bytes
-				$point++;
-				if($point >= strlen($text))
-					return strlen($text);
-				$char = ord( $text[$point] );
-			}
-			return $point;
-			
-		}
-	}
-	
-	/**
-	 * Search extracts for a pattern, and return snippets
-	 *
-	 * @param string $pattern regexp for matching lines
-	 * @param array $extracts extracts to search   
-	 * @param int $linesleft number of extracts to make
-	 * @param int $contextchars length of snippet
-	 * @param array $out map for highlighted snippets
-	 * @param array $offsets map of starting points of snippets
-	 * @protected
-	 */
-	function process( $pattern, $extracts, &$linesleft, &$contextchars, &$out, &$offsets ){
-		if($linesleft == 0)
-			return; // nothing to do
-		foreach($extracts as $index => $line){			
-			if( array_key_exists($index,$out) )
-				continue; // this line already highlighted
-				
-			$m = array();
-			if ( !preg_match( $pattern, $line, $m, PREG_OFFSET_CAPTURE ) )
-				continue;
-				
-			$offset = $m[0][1];
-			$len = strlen($m[0][0]);
-			if($offset + $len < $contextchars)
-				$begin = 0; 
-			elseif( $len > $contextchars)
-				$begin = $offset;
-			else
-				$begin = $offset + intval( ($len - $contextchars) / 2 );
-			
-			$end = $begin + $contextchars;
-			
-			$posBegin = $begin;
-			// basic snippet from this line
-			$out[$index] = $this->extract($line,$begin,$end,$posBegin);
-			$offsets[$index] = $posBegin;
-			$linesleft--;			
-			if($linesleft == 0)
-				return;
-		}
-	}
-	
-	/** 
-	 * Basic wikitext removal
-	 * @protected
-	 */
-	function removeWiki($text) {
-		$fname = __METHOD__;
-		wfProfileIn( $fname );
-		
-		//$text = preg_replace("/'{2,5}/", "", $text);
-		//$text = preg_replace("/\[[a-z]+:\/\/[^ ]+ ([^]]+)\]/", "\\2", $text);
-		//$text = preg_replace("/\[\[([^]|]+)\]\]/", "\\1", $text);
-		//$text = preg_replace("/\[\[([^]]+\|)?([^|]]+)\]\]/", "\\2", $text);
-		//$text = preg_replace("/\\{\\|(.*?)\\|\\}/", "", $text);
-		//$text = preg_replace("/\\[\\[[A-Za-z_-]+:([^|]+?)\\]\\]/", "", $text);
-		$text = preg_replace("/\\{\\{([^|]+?)\\}\\}/", "", $text);
-		$text = preg_replace("/\\{\\{([^|]+\\|)(.*?)\\}\\}/", "\\2", $text);
-		$text = preg_replace("/\\[\\[([^|]+?)\\]\\]/", "\\1", $text);		
-		$text = preg_replace_callback("/\\[\\[([^|]+\\|)(.*?)\\]\\]/", array($this,'linkReplace'), $text);
-		//$text = preg_replace("/\\[\\[([^|]+\\|)(.*?)\\]\\]/", "\\2", $text);
-		$text = preg_replace("/<\/?[^>]+>/", "", $text);
-		$text = preg_replace("/'''''/", "", $text);
-		$text = preg_replace("/('''|<\/?[iIuUbB]>)/", "", $text);
-		$text = preg_replace("/''/", "", $text);
-		
-		wfProfileOut( $fname );
-		return $text;
-	}
-	
-	/**
-	 * callback to replace [[target|caption]] kind of links, if
-	 * the target is category or image, leave it
-	 *
-	 * @param array $matches
-	 */
-	function linkReplace($matches){
-		$colon = strpos( $matches[1], ':' ); 
-		if( $colon === false )
-			return $matches[2]; // replace with caption
-		global $wgContLang;
-		$ns = substr( $matches[1], 0, $colon );
-		$index = $wgContLang->getNsIndex($ns);
-		if( $index !== false && ($index == NS_FILE || $index == NS_CATEGORY) )
-			return $matches[0]; // return the whole thing 
-		else
-			return $matches[2];
-		
-	}
-
-	/**
-     * Simple & fast snippet extraction, but gives completely unrelevant
-     * snippets
-     *
-     * @param string $text
-     * @param array $terms
-     * @param int $contextlines
-     * @param int $contextchars
-     * @return string
-     */
-    public function highlightSimple( $text, $terms, $contextlines, $contextchars ) {
-        global $wgLang, $wgContLang;
-        $fname = __METHOD__;
-
-        $lines = explode( "\n", $text );
-        
-        $terms = implode( '|', $terms );
-        $max = intval( $contextchars ) + 1;
-        $pat1 = "/(.*)($terms)(.{0,$max})/i";
-
-        $lineno = 0;
-
-        $extract = "";
-        wfProfileIn( "$fname-extract" );
-        foreach ( $lines as $line ) {
-            if ( 0 == $contextlines ) {
-                break;
-            }
-            ++$lineno;
-            $m = array();
-            if ( ! preg_match( $pat1, $line, $m ) ) {
-                continue;
-            }
-            --$contextlines;
-            $pre = $wgContLang->truncate( $m[1], -$contextchars );
-
-            if ( count( $m ) < 3 ) {
-                $post = '';
-            } else {
-                $post = $wgContLang->truncate( $m[3], $contextchars );
-            }
-
-            $found = $m[2];
-
-            $line = htmlspecialchars( $pre . $found . $post );
-            $pat2 = '/(' . $terms . ")/i";
-            $line = preg_replace( $pat2,
-              "<span class='searchmatch'>\\1</span>", $line );
-
-            $extract .= "${line}\n";
-        }
-        wfProfileOut( "$fname-extract" );
-        
-        return $extract;
-    }
-	
-}
-
-/**
- * Dummy class to be used when non-supported Database engine is present.
- * @fixme Dummy class should probably try something at least mildly useful,
- * such as a LIKE search through titles.
- * @ingroup Search
- */
-class SearchEngineDummy extends SearchEngine {
-	// no-op
-}