3
* @defgroup Search Search
10
* Contain a class for special pages
17
var $searchTerms = array();
18
var $namespaces = array( NS_MAIN );
19
var $showRedirects = false;
22
* Perform a full text search query and return a result set.
23
* If title searches are not supported or disabled, return null.
25
* @param string $term - Raw search term
26
* @return SearchResultSet
30
function searchText( $term ) {
35
* Perform a title-only search query and return a result set.
36
* If title searches are not supported or disabled, return null.
38
* @param string $term - Raw search term
39
* @return SearchResultSet
43
function searchTitle( $term ) {
47
/** If this search backend can list/unlist redirects */
48
function acceptListRedirects() {
53
* Transform search term in cases when parts of the query came as different GET params (when supported)
54
* e.g. for prefix queries: search=test&prefix=Main_Page/Archive -> test prefix:Main Page/Archive
56
function transformSearchTerm( $term ) {
61
* If an exact title match can be find, or a very slightly close match,
62
* return the title. If no match, returns NULL.
67
public static function getNearMatch( $searchterm ) {
70
$allSearchTerms = array($searchterm);
72
if($wgContLang->hasVariants()){
73
$allSearchTerms = array_merge($allSearchTerms,$wgContLang->convertLinkToAllVariants($searchterm));
76
foreach($allSearchTerms as $term){
78
# Exact match? No need to look further.
79
$title = Title::newFromText( $term );
83
if ( $title->getNamespace() == NS_SPECIAL || $title->isExternal()
84
|| $title->exists() ) {
88
# Now try all lower case (i.e. first letter capitalized)
90
$title = Title::newFromText( $wgContLang->lc( $term ) );
91
if ( $title && $title->exists() ) {
95
# Now try capitalized string
97
$title = Title::newFromText( $wgContLang->ucwords( $term ) );
98
if ( $title && $title->exists() ) {
102
# Now try all upper case
104
$title = Title::newFromText( $wgContLang->uc( $term ) );
105
if ( $title && $title->exists() ) {
109
# Now try Word-Caps-Breaking-At-Word-Breaks, for hyphenated names etc
110
$title = Title::newFromText( $wgContLang->ucwordbreaks($term) );
111
if ( $title && $title->exists() ) {
115
// Give hooks a chance at better match variants
117
if( !wfRunHooks( 'SearchGetNearMatch', array( $term, &$title ) ) ) {
122
$title = Title::newFromText( $searchterm );
124
# Entering an IP address goes to the contributions page
125
if ( ( $title->getNamespace() == NS_USER && User::isIP($title->getText() ) )
126
|| User::isIP( trim( $searchterm ) ) ) {
127
return SpecialPage::getTitleFor( 'Contributions', $title->getDBkey() );
131
# Entering a user goes to the user page whether it's there or not
132
if ( $title->getNamespace() == NS_USER ) {
136
# Go to images that exist even if there's no local page.
137
# There may have been a funny upload, or it may be on a shared
138
# file repository such as Wikimedia Commons.
139
if( $title->getNamespace() == NS_FILE ) {
140
$image = wfFindFile( $title );
146
# MediaWiki namespace? Page may be "implied" if not customized.
147
# Just return it, with caps forced as the message system likes it.
148
if( $title->getNamespace() == NS_MEDIAWIKI ) {
149
return Title::makeTitle( NS_MEDIAWIKI, $wgContLang->ucfirst( $title->getText() ) );
152
# Quoted term? Try without the quotes...
154
if( preg_match( '/^"([^"]+)"$/', $searchterm, $matches ) ) {
155
return SearchEngine::getNearMatch( $matches[1] );
161
public static function legalSearchChars() {
162
return "A-Za-z_'.0-9\\x80-\\xFF\\-";
166
* Set the maximum number of results to return
167
* and how many to skip before returning the first.
173
function setLimitOffset( $limit, $offset = 0 ) {
174
$this->limit = intval( $limit );
175
$this->offset = intval( $offset );
179
* Set which namespaces the search should include.
180
* Give an array of namespace index numbers.
182
* @param array $namespaces
185
function setNamespaces( $namespaces ) {
186
$this->namespaces = $namespaces;
190
* Parse some common prefixes: all (search everything)
193
* @param string $query
195
function replacePrefixes( $query ){
198
if( strpos($query,':') === false )
199
return $query; // nothing to do
202
$allkeyword = wfMsgForContent('searchall').":";
203
if( strncmp($query, $allkeyword, strlen($allkeyword)) == 0 ){
204
$this->namespaces = null;
205
$parsed = substr($query,strlen($allkeyword));
206
} else if( strpos($query,':') !== false ) {
207
$prefix = substr($query,0,strpos($query,':'));
208
$index = $wgContLang->getNsIndex($prefix);
209
if($index !== false){
210
$this->namespaces = array($index);
211
$parsed = substr($query,strlen($prefix)+1);
214
if(trim($parsed) == '')
215
return $query; // prefix was the whole query
221
* Make a list of searchable namespaces and their canonical names.
224
public static function searchableNamespaces() {
227
foreach( $wgContLang->getNamespaces() as $ns => $name ) {
228
if( $ns >= NS_MAIN ) {
236
* Extract default namespaces to search from the given user's
237
* settings, returning a list of index numbers.
243
public static function userNamespaces( &$user ) {
245
foreach( SearchEngine::searchableNamespaces() as $ns => $name ) {
246
if( $user->getOption( 'searchNs' . $ns ) ) {
254
* Find snippet highlight settings for a given user
257
* @return array contextlines, contextchars
260
public static function userHighlightPrefs( &$user ){
261
//$contextlines = $user->getOption( 'contextlines', 5 );
262
//$contextchars = $user->getOption( 'contextchars', 50 );
263
$contextlines = 2; // Hardcode this. Old defaults sucked. :)
264
$contextchars = 75; // same as above.... :P
265
return array($contextlines, $contextchars);
269
* An array of namespaces indexes to be searched by default
274
public static function defaultNamespaces(){
275
global $wgNamespacesToBeSearchedDefault;
277
return array_keys($wgNamespacesToBeSearchedDefault, true);
281
* Get a list of namespace names useful for showing in tooltips
284
* @param unknown_type $namespaces
286
public static function namespacesAsText( $namespaces ){
289
$formatted = array_map( array($wgContLang,'getFormattedNsText'), $namespaces );
290
foreach( $formatted as $key => $ns ){
292
$formatted[$key] = wfMsg( 'blanknamespace' );
298
* An array of "project" namespaces indexes typically searched
304
public static function projectNamespaces() {
305
global $wgNamespacesToBeSearchedDefault, $wgNamespacesToBeSearchedProject;
307
return array_keys( $wgNamespacesToBeSearchedProject, true );
311
* An array of "project" namespaces indexes typically searched
312
* by logged-in users in addition to the default namespaces
317
public static function defaultAndProjectNamespaces() {
318
global $wgNamespacesToBeSearchedDefault, $wgNamespacesToBeSearchedProject;
320
return array_keys( $wgNamespacesToBeSearchedDefault +
321
$wgNamespacesToBeSearchedProject, true);
325
* Return a 'cleaned up' search string
330
function filter( $text ) {
331
$lc = $this->legalSearchChars();
332
return trim( preg_replace( "/[^{$lc}]/", " ", $text ) );
335
* Load up the appropriate search engine class for the currently
336
* active database backend, and return a configured instance.
338
* @return SearchEngine
340
public static function create() {
341
global $wgSearchType;
342
$dbr = wfGetDB( DB_SLAVE );
343
if( $wgSearchType ) {
344
$class = $wgSearchType;
346
$class = $dbr->getSearchEngine();
348
$search = new $class( $dbr );
349
$search->setLimitOffset(0,0);
354
* Create or update the search index record for the given page.
355
* Title and text should be pre-processed.
358
* @param string $title
359
* @param string $text
362
function update( $id, $title, $text ) {
367
* Update a search index record's title only.
368
* Title should be pre-processed.
371
* @param string $title
374
function updateTitle( $id, $title ) {
379
* Get OpenSearch suggestion template
384
public static function getOpenSearchTemplate() {
385
global $wgOpenSearchTemplate, $wgServer, $wgScriptPath;
386
if( $wgOpenSearchTemplate ) {
387
return $wgOpenSearchTemplate;
389
$ns = implode( '|', SearchEngine::defaultNamespaces() );
390
if( !$ns ) $ns = "0";
391
return $wgServer . $wgScriptPath . '/api.php?action=opensearch&search={searchTerms}&namespace='.$ns;
396
* Get internal MediaWiki Suggest template
401
public static function getMWSuggestTemplate() {
402
global $wgMWSuggestTemplate, $wgServer, $wgScriptPath;
403
if($wgMWSuggestTemplate)
404
return $wgMWSuggestTemplate;
406
return $wgServer . $wgScriptPath . '/api.php?action=opensearch&search={searchTerms}&namespace={namespaces}';
413
class SearchResultSet {
415
* Fetch an array of regular expression fragments for matching
416
* the search terms as parsed by this engine in a text extract.
422
function termMatches() {
431
* Return true if results are included in this result set.
435
function hasResults() {
440
* Some search modes return a total hit count for the query
441
* in the entire article database. This may include pages
442
* in namespaces that would not be matched on the given
445
* Return null if no total hits number is supported.
450
function getTotalHits() {
455
* Some search modes return a suggested alternate term if there are
456
* no exact hits. Returns true if there is one on this set.
461
function hasSuggestion() {
466
* @return string suggested query, null if none
468
function getSuggestionQuery(){
473
* @return string HTML highlighted suggested query, '' if none
475
function getSuggestionSnippet(){
480
* Return information about how and from where the results were fetched,
481
* should be useful for diagnostics and debugging
490
* Return a result set of hits on other (multiple) wikis associated with this one
492
* @return SearchResultSet
494
function getInterwikiResults() {
499
* Check if there are results on other wikis
503
function hasInterwikiResults() {
504
return $this->getInterwikiResults() != null;
509
* Fetches next search result, or false.
510
* @return SearchResult
519
* Frees the result set, if applicable.
531
class SearchResultTooMany {
532
## Some search engines may bail out if too many matches are found
537
* @fixme This class is horribly factored. It would probably be better to have
538
* a useful base class to which you pass some standard information, then let
539
* the fancy self-highlighters extend that.
543
var $mRevision = null;
546
function __construct( $row ) {
547
$this->mTitle = Title::makeTitle( $row->page_namespace, $row->page_title );
548
if( !is_null($this->mTitle) ){
549
$this->mRevision = Revision::newFromTitle( $this->mTitle );
550
if( $this->mTitle->getNamespace() === NS_FILE )
551
$this->mImage = wfFindFile( $this->mTitle );
556
* Check if this is result points to an invalid title
561
function isBrokenTitle(){
562
if( is_null($this->mTitle) )
568
* Check if target page is missing, happens when index is out of date
573
function isMissingRevision(){
574
return !$this->mRevision && !$this->mImage;
581
function getTitle() {
582
return $this->mTitle;
586
* @return double or null if not supported
588
function getScore() {
593
* Lazy initialization of article text from DB
595
protected function initText(){
596
if( !isset($this->mText) ){
597
if($this->mRevision != null)
598
$this->mText = $this->mRevision->getText();
599
else // TODO: can we fetch raw wikitext for commons images?
606
* @param array $terms terms to highlight
607
* @return string highlighted text snippet, null (and not '') if not supported
609
function getTextSnippet($terms){
610
global $wgUser, $wgAdvancedSearchHighlighting;
612
list($contextlines,$contextchars) = SearchEngine::userHighlightPrefs($wgUser);
613
$h = new SearchHighlighter();
614
if( $wgAdvancedSearchHighlighting )
615
return $h->highlightText( $this->mText, $terms, $contextlines, $contextchars );
617
return $h->highlightSimple( $this->mText, $terms, $contextlines, $contextchars );
621
* @param array $terms terms to highlight
622
* @return string highlighted title, '' if not supported
624
function getTitleSnippet($terms){
629
* @param array $terms terms to highlight
630
* @return string highlighted redirect name (redirect to this page), '' if none or not supported
632
function getRedirectSnippet($terms){
637
* @return Title object for the redirect to this page, null if none or not supported
639
function getRedirectTitle(){
644
* @return string highlighted relevant section name, null if none or not supported
646
function getSectionSnippet(){
651
* @return Title object (pagename+fragment) for the section, null if none or not supported
653
function getSectionTitle(){
658
* @return string timestamp
660
function getTimestamp(){
661
if( $this->mRevision )
662
return $this->mRevision->getTimestamp();
663
else if( $this->mImage )
664
return $this->mImage->getTimestamp();
669
* @return int number of words
671
function getWordCount(){
673
return str_word_count( $this->mText );
677
* @return int size in bytes
679
function getByteSize(){
681
return strlen( $this->mText );
685
* @return boolean if hit has related articles
687
function hasRelated(){
692
* @return interwiki prefix of the title (return iw even if title is broken)
694
function getInterwikiPrefix(){
700
* Highlight bits of wikitext
704
class SearchHighlighter {
705
var $mCleanWikitext = true;
707
function SearchHighlighter($cleanupWikitext = true){
708
$this->mCleanWikitext = $cleanupWikitext;
712
* Default implementation of wikitext highlighting
714
* @param string $text
715
* @param array $terms Terms to highlight (unescaped)
716
* @param int $contextlines
717
* @param int $contextchars
720
public function highlightText( $text, $terms, $contextlines, $contextchars ) {
721
global $wgLang, $wgContLang;
722
global $wgSearchHighlightBoundaries;
728
// spli text into text + templates/links/tables
729
$spat = "/(\\{\\{)|(\\[\\[[^\\]:]+:)|(\n\\{\\|)";
730
// first capture group is for detecting nested templates/links/tables/references
731
$endPatterns = array(
732
1 => '/(\{\{)|(\}\})/', // template
733
2 => '/(\[\[)|(\]\])/', // image
734
3 => "/(\n\\{\\|)|(\n\\|\\})/"); // table
736
// FIXME: this should prolly be a hook or something
737
if(function_exists('wfCite')){
738
$spat .= '|(<ref>)'; // references via cite extension
739
$endPatterns[4] = '/(<ref>)|(<\/ref>)/';
742
$textExt = array(); // text extracts
743
$otherExt = array(); // other extracts
744
wfProfileIn( "$fname-split" );
746
$textLen = strlen($text);
747
$count = 0; // sequence number to maintain ordering
748
while( $start < $textLen ){
749
// find start of template/image/table
750
if( preg_match( $spat, $text, $matches, PREG_OFFSET_CAPTURE, $start ) ){
752
foreach($matches as $key => $val){
753
if($key > 0 && $val[1] != -1){
755
// see if this is an image link
756
$ns = substr($val[0],2,-1);
757
if( $wgContLang->getNsIndex($ns) != NS_FILE )
761
$epat = $endPatterns[$key];
762
$this->splitAndAdd( $textExt, $count, substr( $text, $start, $val[1] - $start ) );
768
// find end (and detect any nested elements)
770
$offset = $start + 1;
772
while( preg_match( $epat, $text, $endMatches, PREG_OFFSET_CAPTURE, $offset ) ){
773
if( array_key_exists(2,$endMatches) ){
776
$len = strlen($endMatches[2][0]);
777
$off = $endMatches[2][1];
778
$this->splitAndAdd( $otherExt, $count,
779
substr( $text, $start, $off + $len - $start ) );
780
$start = $off + $len;
784
// end of nested element
791
$offset = $endMatches[0][1] + strlen($endMatches[0][0]);
794
// couldn't find appropriate closing tag, skip
795
$this->splitAndAdd( $textExt, $count, substr( $text, $start, strlen($matches[0][0]) ) );
796
$start += strlen($matches[0][0]);
801
// else: add as text extract
802
$this->splitAndAdd( $textExt, $count, substr($text,$start) );
806
$all = $textExt + $otherExt; // these have disjunct key sets
808
wfProfileOut( "$fname-split" );
811
foreach( $terms as $index => $term ) {
812
// manually do upper/lowercase stuff for utf-8 since PHP won't do it
813
if(preg_match('/[\x80-\xff]/', $term) ){
814
$terms[$index] = preg_replace_callback('/./us',array($this,'caseCallback'),$terms[$index]);
816
$terms[$index] = $term;
819
$anyterm = implode( '|', $terms );
820
$phrase = implode("$wgSearchHighlightBoundaries+", $terms );
822
// FIXME: a hack to scale contextchars, a correct solution
823
// would be to have contextchars actually be char and not byte
824
// length, and do proper utf-8 substrings and lengths everywhere,
825
// but PHP is making that very hard and unclean to implement :(
826
$scale = strlen($anyterm) / mb_strlen($anyterm);
827
$contextchars = intval( $contextchars * $scale );
829
$patPre = "(^|$wgSearchHighlightBoundaries)";
830
$patPost = "($wgSearchHighlightBoundaries|$)";
832
$pat1 = "/(".$phrase.")/ui";
833
$pat2 = "/$patPre(".$anyterm.")$patPost/ui";
835
wfProfileIn( "$fname-extract" );
837
$left = $contextlines;
842
// show beginning only if it contains all words
845
foreach($textExt as $index => $line){
846
if(strlen($line)>0 && $line[0] != ';' && $line[0] != ':'){
847
$firstText = $this->extract( $line, 0, $contextchars * $contextlines );
854
// check if first text contains all terms
855
foreach($terms as $term){
856
if( ! preg_match("/$patPre".$term."$patPost/ui", $firstText) ){
862
$snippets[$first] = $firstText;
863
$offsets[$first] = 0;
867
// match whole query on text
868
$this->process($pat1, $textExt, $left, $contextchars, $snippets, $offsets);
869
// match whole query on templates/tables/images
870
$this->process($pat1, $otherExt, $left, $contextchars, $snippets, $offsets);
871
// match any words on text
872
$this->process($pat2, $textExt, $left, $contextchars, $snippets, $offsets);
873
// match any words on templates/tables/images
874
$this->process($pat2, $otherExt, $left, $contextchars, $snippets, $offsets);
879
// add extra chars to each snippet to make snippets constant size
881
if( count( $snippets ) == 0){
882
// couldn't find the target words, just show beginning of article
883
$targetchars = $contextchars * $contextlines;
884
$snippets[$first] = '';
885
$offsets[$first] = 0;
887
// if begin of the article contains the whole phrase, show only that !!
888
if( array_key_exists($first,$snippets) && preg_match($pat1,$snippets[$first])
889
&& $offsets[$first] < $contextchars * 2 ){
890
$snippets = array ($first => $snippets[$first]);
893
// calc by how much to extend existing snippets
894
$targetchars = intval( ($contextchars * $contextlines) / count ( $snippets ) );
897
foreach($snippets as $index => $line){
898
$extended[$index] = $line;
899
$len = strlen($line);
900
if( $len < $targetchars - 20 ){
901
// complete this line
902
if($len < strlen( $all[$index] )){
903
$extended[$index] = $this->extract( $all[$index], $offsets[$index], $offsets[$index]+$targetchars, $offsets[$index]);
904
$len = strlen( $extended[$index] );
909
while( $len < $targetchars - 20
910
&& array_key_exists($add,$all)
911
&& !array_key_exists($add,$snippets) ){
913
$tt = "\n".$this->extract( $all[$add], 0, $targetchars - $len, $offsets[$add] );
914
$extended[$add] = $tt;
915
$len += strlen( $tt );
921
//$snippets = array_map('htmlspecialchars', $extended);
922
$snippets = $extended;
925
foreach($snippets as $index => $line){
927
$extract .= $line; // first line
928
elseif($last+1 == $index && $offsets[$last]+strlen($snippets[$last]) >= strlen($all[$last]))
929
$extract .= " ".$line; // continous lines
931
$extract .= '<b> ... </b>' . $line;
936
$extract .= '<b> ... </b>';
938
$processed = array();
939
foreach($terms as $term){
940
if( ! isset($processed[$term]) ){
941
$pat3 = "/$patPre(".$term.")$patPost/ui"; // highlight word
942
$extract = preg_replace( $pat3,
943
"\\1<span class='searchmatch'>\\2</span>\\3", $extract );
944
$processed[$term] = true;
948
wfProfileOut( "$fname-extract" );
954
* Split text into lines and add it to extracts array
956
* @param array $extracts index -> $line
958
* @param string $text
960
function splitAndAdd(&$extracts, &$count, $text){
961
$split = explode( "\n", $this->mCleanWikitext? $this->removeWiki($text) : $text );
962
foreach($split as $line){
965
$extracts[$count++] = $tt;
970
* Do manual case conversion for non-ascii chars
972
* @param unknown_type $matches
974
function caseCallback($matches){
976
if( strlen($matches[0]) > 1 ){
977
return '['.$wgContLang->lc($matches[0]).$wgContLang->uc($matches[0]).']';
983
* Extract part of the text from start to end, but by
984
* not chopping up words
985
* @param string $text
988
* @param int $posStart (out) actual start position
989
* @param int $posEnd (out) actual end position
992
function extract($text, $start, $end, &$posStart = null, &$posEnd = null ){
996
$start = $this->position( $text, $start, 1 );
997
if( $end >= strlen($text) )
998
$end = strlen($text);
1000
$end = $this->position( $text, $end );
1002
if(!is_null($posStart))
1004
if(!is_null($posEnd))
1008
return substr($text, $start, $end-$start);
1014
* Find a nonletter near a point (index) in the text
1016
* @param string $text
1018
* @param int $offset to found index
1019
* @return int nearest nonletter index, or beginning of utf8 char if none
1021
function position($text, $point, $offset=0 ){
1023
$s = max( 0, $point - $tolerance );
1024
$l = min( strlen($text), $point + $tolerance ) - $s;
1026
if( preg_match('/[ ,.!?~!@#$%^&*\(\)+=\-\\\|\[\]"\'<>]/', substr($text,$s,$l), $m, PREG_OFFSET_CAPTURE ) ){
1027
return $m[0][1] + $s + $offset;
1029
// check if point is on a valid first UTF8 char
1030
$char = ord( $text[$point] );
1031
while( $char >= 0x80 && $char < 0xc0 ) {
1032
// skip trailing bytes
1034
if($point >= strlen($text))
1035
return strlen($text);
1036
$char = ord( $text[$point] );
1044
* Search extracts for a pattern, and return snippets
1046
* @param string $pattern regexp for matching lines
1047
* @param array $extracts extracts to search
1048
* @param int $linesleft number of extracts to make
1049
* @param int $contextchars length of snippet
1050
* @param array $out map for highlighted snippets
1051
* @param array $offsets map of starting points of snippets
1054
function process( $pattern, $extracts, &$linesleft, &$contextchars, &$out, &$offsets ){
1056
return; // nothing to do
1057
foreach($extracts as $index => $line){
1058
if( array_key_exists($index,$out) )
1059
continue; // this line already highlighted
1062
if ( !preg_match( $pattern, $line, $m, PREG_OFFSET_CAPTURE ) )
1066
$len = strlen($m[0][0]);
1067
if($offset + $len < $contextchars)
1069
elseif( $len > $contextchars)
1072
$begin = $offset + intval( ($len - $contextchars) / 2 );
1074
$end = $begin + $contextchars;
1077
// basic snippet from this line
1078
$out[$index] = $this->extract($line,$begin,$end,$posBegin);
1079
$offsets[$index] = $posBegin;
1087
* Basic wikitext removal
1090
function removeWiki($text) {
1091
$fname = __METHOD__;
1092
wfProfileIn( $fname );
1094
//$text = preg_replace("/'{2,5}/", "", $text);
1095
//$text = preg_replace("/\[[a-z]+:\/\/[^ ]+ ([^]]+)\]/", "\\2", $text);
1096
//$text = preg_replace("/\[\[([^]|]+)\]\]/", "\\1", $text);
1097
//$text = preg_replace("/\[\[([^]]+\|)?([^|]]+)\]\]/", "\\2", $text);
1098
//$text = preg_replace("/\\{\\|(.*?)\\|\\}/", "", $text);
1099
//$text = preg_replace("/\\[\\[[A-Za-z_-]+:([^|]+?)\\]\\]/", "", $text);
1100
$text = preg_replace("/\\{\\{([^|]+?)\\}\\}/", "", $text);
1101
$text = preg_replace("/\\{\\{([^|]+\\|)(.*?)\\}\\}/", "\\2", $text);
1102
$text = preg_replace("/\\[\\[([^|]+?)\\]\\]/", "\\1", $text);
1103
$text = preg_replace_callback("/\\[\\[([^|]+\\|)(.*?)\\]\\]/", array($this,'linkReplace'), $text);
1104
//$text = preg_replace("/\\[\\[([^|]+\\|)(.*?)\\]\\]/", "\\2", $text);
1105
$text = preg_replace("/<\/?[^>]+>/", "", $text);
1106
$text = preg_replace("/'''''/", "", $text);
1107
$text = preg_replace("/('''|<\/?[iIuUbB]>)/", "", $text);
1108
$text = preg_replace("/''/", "", $text);
1110
wfProfileOut( $fname );
1115
* callback to replace [[target|caption]] kind of links, if
1116
* the target is category or image, leave it
1118
* @param array $matches
1120
function linkReplace($matches){
1121
$colon = strpos( $matches[1], ':' );
1122
if( $colon === false )
1123
return $matches[2]; // replace with caption
1125
$ns = substr( $matches[1], 0, $colon );
1126
$index = $wgContLang->getNsIndex($ns);
1127
if( $index !== false && ($index == NS_FILE || $index == NS_CATEGORY) )
1128
return $matches[0]; // return the whole thing
1135
* Simple & fast snippet extraction, but gives completely unrelevant
1138
* @param string $text
1139
* @param array $terms
1140
* @param int $contextlines
1141
* @param int $contextchars
1144
public function highlightSimple( $text, $terms, $contextlines, $contextchars ) {
1145
global $wgLang, $wgContLang;
1146
$fname = __METHOD__;
1148
$lines = explode( "\n", $text );
1150
$terms = implode( '|', $terms );
1151
$max = intval( $contextchars ) + 1;
1152
$pat1 = "/(.*)($terms)(.{0,$max})/i";
1157
wfProfileIn( "$fname-extract" );
1158
foreach ( $lines as $line ) {
1159
if ( 0 == $contextlines ) {
1164
if ( ! preg_match( $pat1, $line, $m ) ) {
1168
$pre = $wgContLang->truncate( $m[1], -$contextchars, ' ... ' );
1170
if ( count( $m ) < 3 ) {
1173
$post = $wgContLang->truncate( $m[3], $contextchars, ' ... ' );
1178
$line = htmlspecialchars( $pre . $found . $post );
1179
$pat2 = '/(' . $terms . ")/i";
1180
$line = preg_replace( $pat2,
1181
"<span class='searchmatch'>\\1</span>", $line );
1183
$extract .= "${line}\n";
1185
wfProfileOut( "$fname-extract" );
1193
* Dummy class to be used when non-supported Database engine is present.
1194
* @fixme Dummy class should probably try something at least mildly useful,
1195
* such as a LIKE search through titles.
1198
class SearchEngineDummy extends SearchEngine {
added
removed
mediawiki-1.14.0/includes/SearchEngine.php
