summaryrefslogtreecommitdiff
path: root/includes/specials/SpecialSearch.php
blob: 608d62e63e11f5e175bb7eaec24f5dd33fcb4612 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
<?php
/**
 * Implements Special:Search
 *
 * Copyright © 2004 Brion Vibber <brion@pobox.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @ingroup SpecialPage
 */

/**
 * implements Special:Search - Run text & title search and display the output
 * @ingroup SpecialPage
 */
class SpecialSearch extends SpecialPage {
	/**
	 * Current search profile. Search profile is just a name that identifies
	 * the active search tab on the search page (content, discussions...)
	 * For users tt replaces the set of enabled namespaces from the query
	 * string when applicable. Extensions can add new profiles with hooks
	 * with custom search options just for that profile.
	 * @var null|string
	 */
	protected $profile;

	/** @var SearchEngine Search engine */
	protected $searchEngine;

	/** @var string Search engine type, if not default */
	protected $searchEngineType;

	/** @var array For links */
	protected $extraParams = array();

	/** @var string No idea, apparently used by some other classes */
	protected $mPrefix;

	/**
	 * @var int
	 */
	protected $limit, $offset;

	/**
	 * @var array
	 */
	protected $namespaces;

	/**
	 * @var string
	 */
	protected $fulltext;

	const NAMESPACES_CURRENT = 'sense';

	public function __construct() {
		parent::__construct( 'Search' );
	}

	/**
	 * Entry point
	 *
	 * @param string $par
	 */
	public function execute( $par ) {
		$this->setHeaders();
		$this->outputHeader();
		$out = $this->getOutput();
		$out->allowClickjacking();
		$out->addModuleStyles( array(
			'mediawiki.special', 'mediawiki.special.search', 'mediawiki.ui', 'mediawiki.ui.button',
			'mediawiki.ui.input',
		) );

		// Strip underscores from title parameter; most of the time we'll want
		// text form here. But don't strip underscores from actual text params!
		$titleParam = str_replace( '_', ' ', $par );

		$request = $this->getRequest();

		// Fetch the search term
		$search = str_replace( "\n", " ", $request->getText( 'search', $titleParam ) );

		$this->load();
		if ( !is_null( $request->getVal( 'nsRemember' ) ) ) {
			$this->saveNamespaces();
			// Remove the token from the URL to prevent the user from inadvertently
			// exposing it (e.g. by pasting it into a public wiki page) or undoing
			// later settings changes (e.g. by reloading the page).
			$query = $request->getValues();
			unset( $query['title'], $query['nsRemember'] );
			$out->redirect( $this->getPageTitle()->getFullURL( $query ) );
			return;
		}

		$this->searchEngineType = $request->getVal( 'srbackend' );

		if ( $request->getVal( 'fulltext' )
			|| !is_null( $request->getVal( 'offset' ) )
		) {
			$this->showResults( $search );
		} else {
			$this->goResult( $search );
		}
	}

	/**
	 * Set up basic search parameters from the request and user settings.
	 *
	 * @see tests/phpunit/includes/specials/SpecialSearchTest.php
	 */
	public function load() {
		$request = $this->getRequest();
		list( $this->limit, $this->offset ) = $request->getLimitOffset( 20, '' );
		$this->mPrefix = $request->getVal( 'prefix', '' );

		$user = $this->getUser();

		# Extract manually requested namespaces
		$nslist = $this->powerSearch( $request );
		if ( !count( $nslist ) ) {
			# Fallback to user preference
			$nslist = SearchEngine::userNamespaces( $user );
		}

		$profile = null;
		if ( !count( $nslist ) ) {
			$profile = 'default';
		}

		$profile = $request->getVal( 'profile', $profile );
		$profiles = $this->getSearchProfiles();
		if ( $profile === null ) {
			// BC with old request format
			$profile = 'advanced';
			foreach ( $profiles as $key => $data ) {
				if ( $nslist === $data['namespaces'] && $key !== 'advanced' ) {
					$profile = $key;
				}
			}
			$this->namespaces = $nslist;
		} elseif ( $profile === 'advanced' ) {
			$this->namespaces = $nslist;
		} else {
			if ( isset( $profiles[$profile]['namespaces'] ) ) {
				$this->namespaces = $profiles[$profile]['namespaces'];
			} else {
				// Unknown profile requested
				$profile = 'default';
				$this->namespaces = $profiles['default']['namespaces'];
			}
		}

		$this->fulltext = $request->getVal( 'fulltext' );
		$this->profile = $profile;
	}

	/**
	 * If an exact title match can be found, jump straight ahead to it.
	 *
	 * @param string $term
	 */
	public function goResult( $term ) {
		$this->setupPage( $term );
		# Try to go to page as entered.
		$title = Title::newFromText( $term );
		# If the string cannot be used to create a title
		if ( is_null( $title ) ) {
			$this->showResults( $term );

			return;
		}
		# If there's an exact or very near match, jump right there.
		$title = SearchEngine::getNearMatch( $term );

		if ( !is_null( $title ) ) {
			$this->getOutput()->redirect( $title->getFullURL() );

			return;
		}
		# No match, generate an edit URL
		$title = Title::newFromText( $term );
		if ( !is_null( $title ) ) {
			Hooks::run( 'SpecialSearchNogomatch', array( &$title ) );
		}
		$this->showResults( $term );
	}

	/**
	 * @param string $term
	 */
	public function showResults( $term ) {
		global $wgContLang;

		$search = $this->getSearchEngine();
		$search->setLimitOffset( $this->limit, $this->offset );
		$search->setNamespaces( $this->namespaces );
		$search->prefix = $this->mPrefix;
		$term = $search->transformSearchTerm( $term );
		$didYouMeanHtml = '';

		Hooks::run( 'SpecialSearchSetupEngine', array( $this, $this->profile, $search ) );

		$this->setupPage( $term );

		$out = $this->getOutput();

		if ( $this->getConfig()->get( 'DisableTextSearch' ) ) {
			$searchFowardUrl = $this->getConfig()->get( 'SearchForwardUrl' );
			if ( $searchFowardUrl ) {
				$url = str_replace( '$1', urlencode( $term ), $searchFowardUrl );
				$out->redirect( $url );
			} else {
				$out->addHTML(
					Xml::openElement( 'fieldset' ) .
					Xml::element( 'legend', null, $this->msg( 'search-external' )->text() ) .
					Xml::element(
						'p',
						array( 'class' => 'mw-searchdisabled' ),
						$this->msg( 'searchdisabled' )->text()
					) .
					$this->msg( 'googlesearch' )->rawParams(
						htmlspecialchars( $term ),
						'UTF-8',
						$this->msg( 'searchbutton' )->escaped()
					)->text() .
					Xml::closeElement( 'fieldset' )
				);
			}

			return;
		}

		$title = Title::newFromText( $term );
		$showSuggestion = $title === null || !$title->isKnown();
		$search->setShowSuggestion( $showSuggestion );

		// fetch search results
		$rewritten = $search->replacePrefixes( $term );

		$titleMatches = $search->searchTitle( $rewritten );
		$textMatches = $search->searchText( $rewritten );

		$textStatus = null;
		if ( $textMatches instanceof Status ) {
			$textStatus = $textMatches;
			$textMatches = null;
		}

		// did you mean... suggestions
		if ( $showSuggestion && $textMatches && !$textStatus && $textMatches->hasSuggestion() ) {
			# mirror Go/Search behavior of original request ..
			$didYouMeanParams = array( 'search' => $textMatches->getSuggestionQuery() );

			if ( $this->fulltext != null ) {
				$didYouMeanParams['fulltext'] = $this->fulltext;
			}

			$stParams = array_merge(
				$didYouMeanParams,
				$this->powerSearchOptions()
			);

			$suggestionSnippet = $textMatches->getSuggestionSnippet();

			if ( $suggestionSnippet == '' ) {
				$suggestionSnippet = null;
			}

			$suggestLink = Linker::linkKnown(
				$this->getPageTitle(),
				$suggestionSnippet,
				array(),
				$stParams
			);

			# html of did you mean... search suggestion link
			$didYouMeanHtml =
				Xml::openElement( 'div', array( 'class' => 'searchdidyoumean' ) ) .
				$this->msg( 'search-suggest' )->rawParams( $suggestLink )->text() .
				Xml::closeElement( 'div' );
		}

		if ( !Hooks::run( 'SpecialSearchResultsPrepend', array( $this, $out, $term ) ) ) {
			# Hook requested termination
			return;
		}

		// start rendering the page
		$out->addHtml(
			Xml::openElement(
				'form',
				array(
					'id' => ( $this->isPowerSearch() ? 'powersearch' : 'search' ),
					'method' => 'get',
					'action' => wfScript(),
				)
			)
		);

		// Get number of results
		$titleMatchesNum = $textMatchesNum = $numTitleMatches = $numTextMatches = 0;
		if ( $titleMatches ) {
			$titleMatchesNum = $titleMatches->numRows();
			$numTitleMatches = $titleMatches->getTotalHits();
		}
		if ( $textMatches ) {
			$textMatchesNum = $textMatches->numRows();
			$numTextMatches = $textMatches->getTotalHits();
		}
		$num = $titleMatchesNum + $textMatchesNum;
		$totalRes = $numTitleMatches + $numTextMatches;

		$out->addHtml(
			# This is an awful awful ID name. It's not a table, but we
			# named it poorly from when this was a table so now we're
			# stuck with it
			Xml::openElement( 'div', array( 'id' => 'mw-search-top-table' ) ) .
			$this->shortDialog( $term, $num, $totalRes ) .
			Xml::closeElement( 'div' ) .
			$this->searchProfileTabs( $term ) .
			$this->searchOptions( $term ) .
			Xml::closeElement( 'form' ) .
			$didYouMeanHtml
		);

		$filePrefix = $wgContLang->getFormattedNsText( NS_FILE ) . ':';
		if ( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
			// Empty query -- straight view of search form
			return;
		}

		$out->addHtml( "<div class='searchresults'>" );

		// prev/next links
		$prevnext = null;
		if ( $num || $this->offset ) {
			// Show the create link ahead
			$this->showCreateLink( $title, $num, $titleMatches, $textMatches );
			if ( $totalRes > $this->limit || $this->offset ) {
				if ( $this->searchEngineType !== null ) {
					$this->setExtraParam( 'srbackend', $this->searchEngineType );
				}
				$prevnext = $this->getLanguage()->viewPrevNext(
					$this->getPageTitle(),
					$this->offset,
					$this->limit,
					$this->powerSearchOptions() + array( 'search' => $term ),
					$this->limit + $this->offset >= $totalRes
				);
			}
		}
		Hooks::run( 'SpecialSearchResults', array( $term, &$titleMatches, &$textMatches ) );

		$out->parserOptions()->setEditSection( false );
		if ( $titleMatches ) {
			if ( $numTitleMatches > 0 ) {
				$out->wrapWikiMsg( "==$1==\n", 'titlematches' );
				$out->addHTML( $this->showMatches( $titleMatches ) );
			}
			$titleMatches->free();
		}
		if ( $textMatches && !$textStatus ) {
			// output appropriate heading
			if ( $numTextMatches > 0 && $numTitleMatches > 0 ) {
				// if no title matches the heading is redundant
				$out->wrapWikiMsg( "==$1==\n", 'textmatches' );
			}

			// show interwiki results if any
			if ( $textMatches->hasInterwikiResults() ) {
				$out->addHTML( $this->showInterwiki( $textMatches->getInterwikiResults(), $term ) );
			}
			// show results
			if ( $numTextMatches > 0 ) {
				$out->addHTML( $this->showMatches( $textMatches ) );
			}

			$textMatches->free();
		}
		if ( $num === 0 ) {
			if ( $textStatus ) {
				$out->addHTML( '<div class="error">' .
					$textStatus->getMessage( 'search-error' ) . '</div>' );
			} else {
				$out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>",
					array( 'search-nonefound', wfEscapeWikiText( $term ) ) );
				$this->showCreateLink( $title, $num, $titleMatches, $textMatches );
			}
		}
		$out->addHtml( "</div>" );

		if ( $prevnext ) {
			$out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
		}
	}

	/**
	 * @param Title $title
	 * @param int $num The number of search results found
	 * @param null|SearchResultSet $titleMatches Results from title search
	 * @param null|SearchResultSet $textMatches Results from text search
	 */
	protected function showCreateLink( $title, $num, $titleMatches, $textMatches ) {
		// show direct page/create link if applicable

		// Check DBkey !== '' in case of fragment link only.
		if ( is_null( $title ) || $title->getDBkey() === ''
			|| ( $titleMatches !== null && $titleMatches->searchContainedSyntax() )
			|| ( $textMatches !== null && $textMatches->searchContainedSyntax() )
		) {
			// invalid title
			// preserve the paragraph for margins etc...
			$this->getOutput()->addHtml( '<p></p>' );

			return;
		}

		$messageName = 'searchmenu-new-nocreate';
		$linkClass = 'mw-search-createlink';

		if ( !$title->isExternal() ) {
			if ( $title->isKnown() ) {
				$messageName = 'searchmenu-exists';
				$linkClass = 'mw-search-exists';
			} elseif ( $title->quickUserCan( 'create', $this->getUser() ) ) {
				$messageName = 'searchmenu-new';
			}
		}

		$params = array(
			$messageName,
			wfEscapeWikiText( $title->getPrefixedText() ),
			Message::numParam( $num )
		);
		Hooks::run( 'SpecialSearchCreateLink', array( $title, &$params ) );

		// Extensions using the hook might still return an empty $messageName
		if ( $messageName ) {
			$this->getOutput()->wrapWikiMsg( "<p class=\"$linkClass\">\n$1</p>", $params );
		} else {
			// preserve the paragraph for margins etc...
			$this->getOutput()->addHtml( '<p></p>' );
		}
	}

	/**
	 * @param string $term
	 */
	protected function setupPage( $term ) {
		$out = $this->getOutput();
		if ( strval( $term ) !== '' ) {
			$out->setPageTitle( $this->msg( 'searchresults' ) );
			$out->setHTMLTitle( $this->msg( 'pagetitle' )
				->rawParams( $this->msg( 'searchresults-title' )->rawParams( $term )->text() )
				->inContentLanguage()->text()
			);
		}
		// add javascript specific to special:search
		$out->addModules( 'mediawiki.special.search' );
	}

	/**
	 * Return true if current search is a power (advanced) search
	 *
	 * @return bool
	 */
	protected function isPowerSearch() {
		return $this->profile === 'advanced';
	}

	/**
	 * Extract "power search" namespace settings from the request object,
	 * returning a list of index numbers to search.
	 *
	 * @param WebRequest $request
	 * @return array
	 */
	protected function powerSearch( &$request ) {
		$arr = array();
		foreach ( SearchEngine::searchableNamespaces() as $ns => $name ) {
			if ( $request->getCheck( 'ns' . $ns ) ) {
				$arr[] = $ns;
			}
		}

		return $arr;
	}

	/**
	 * Reconstruct the 'power search' options for links
	 *
	 * @return array
	 */
	protected function powerSearchOptions() {
		$opt = array();
		if ( !$this->isPowerSearch() ) {
			$opt['profile'] = $this->profile;
		} else {
			foreach ( $this->namespaces as $n ) {
				$opt['ns' . $n] = 1;
			}
		}

		return $opt + $this->extraParams;
	}

	/**
	 * Save namespace preferences when we're supposed to
	 *
	 * @return bool Whether we wrote something
	 */
	protected function saveNamespaces() {
		$user = $this->getUser();
		$request = $this->getRequest();

		if ( $user->isLoggedIn() &&
			$user->matchEditToken(
				$request->getVal( 'nsRemember' ),
				'searchnamespace',
				$request
			) && !wfReadOnly()
		) {
			// Reset namespace preferences: namespaces are not searched
			// when they're not mentioned in the URL parameters.
			foreach ( MWNamespace::getValidNamespaces() as $n ) {
				$user->setOption( 'searchNs' . $n, false );
			}
			// The request parameters include all the namespaces to be searched.
			// Even if they're the same as an existing profile, they're not eaten.
			foreach ( $this->namespaces as $n ) {
				$user->setOption( 'searchNs' . $n, true );
			}

			$user->saveSettings();
			return true;
		}

		return false;
	}

	/**
	 * Show whole set of results
	 *
	 * @param SearchResultSet $matches
	 *
	 * @return string
	 */
	protected function showMatches( &$matches ) {
		global $wgContLang;

		$terms = $wgContLang->convertForSearchResult( $matches->termMatches() );

		$out = "<ul class='mw-search-results'>\n";
		$result = $matches->next();
		while ( $result ) {
			$out .= $this->showHit( $result, $terms );
			$result = $matches->next();
		}
		$out .= "</ul>\n";

		// convert the whole thing to desired language variant
		$out = $wgContLang->convert( $out );

		return $out;
	}

	/**
	 * Format a single hit result
	 *
	 * @param SearchResult $result
	 * @param array $terms Terms to highlight
	 *
	 * @return string
	 */
	protected function showHit( $result, $terms ) {

		if ( $result->isBrokenTitle() ) {
			return '';
		}

		$title = $result->getTitle();

		$titleSnippet = $result->getTitleSnippet();

		if ( $titleSnippet == '' ) {
			$titleSnippet = null;
		}

		$link_t = clone $title;

		Hooks::run( 'ShowSearchHitTitle',
			array( &$link_t, &$titleSnippet, $result, $terms, $this ) );

		$link = Linker::linkKnown(
			$link_t,
			$titleSnippet
		);

		//If page content is not readable, just return the title.
		//This is not quite safe, but better than showing excerpts from non-readable pages
		//Note that hiding the entry entirely would screw up paging.
		if ( !$title->userCan( 'read', $this->getUser() ) ) {
			return "<li>{$link}</li>\n";
		}

		// If the page doesn't *exist*... our search index is out of date.
		// The least confusing at this point is to drop the result.
		// You may get less results, but... oh well. :P
		if ( $result->isMissingRevision() ) {
			return '';
		}

		// format redirects / relevant sections
		$redirectTitle = $result->getRedirectTitle();
		$redirectText = $result->getRedirectSnippet();
		$sectionTitle = $result->getSectionTitle();
		$sectionText = $result->getSectionSnippet();
		$categorySnippet = $result->getCategorySnippet();

		$redirect = '';
		if ( !is_null( $redirectTitle ) ) {
			if ( $redirectText == '' ) {
				$redirectText = null;
			}

			$redirect = "<span class='searchalttitle'>" .
				$this->msg( 'search-redirect' )->rawParams(
					Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
				"</span>";
		}

		$section = '';
		if ( !is_null( $sectionTitle ) ) {
			if ( $sectionText == '' ) {
				$sectionText = null;
			}

			$section = "<span class='searchalttitle'>" .
				$this->msg( 'search-section' )->rawParams(
					Linker::linkKnown( $sectionTitle, $sectionText ) )->text() .
				"</span>";
		}

		$category = '';
		if ( $categorySnippet ) {
			$category = "<span class='searchalttitle'>" .
				$this->msg( 'search-category' )->rawParams( $categorySnippet )->text() .
				"</span>";
		}

		// format text extract
		$extract = "<div class='searchresult'>" . $result->getTextSnippet( $terms ) . "</div>";

		$lang = $this->getLanguage();

		// format description
		$byteSize = $result->getByteSize();
		$wordCount = $result->getWordCount();
		$timestamp = $result->getTimestamp();
		$size = $this->msg( 'search-result-size', $lang->formatSize( $byteSize ) )
			->numParams( $wordCount )->escaped();

		if ( $title->getNamespace() == NS_CATEGORY ) {
			$cat = Category::newFromTitle( $title );
			$size = $this->msg( 'search-result-category-size' )
				->numParams( $cat->getPageCount(), $cat->getSubcatCount(), $cat->getFileCount() )
				->escaped();
		}

		$date = $lang->userTimeAndDate( $timestamp, $this->getUser() );

		$fileMatch = '';
		// Include a thumbnail for media files...
		if ( $title->getNamespace() == NS_FILE ) {
			$img = $result->getFile();
			$img = $img ?: wfFindFile( $title );
			if ( $result->isFileMatch() ) {
				$fileMatch = "<span class='searchalttitle'>" .
					$this->msg( 'search-file-match' )->escaped() . "</span>";
			}
			if ( $img ) {
				$thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
				if ( $thumb ) {
					$desc = $this->msg( 'parentheses' )->rawParams( $img->getShortDesc() )->escaped();
					// Float doesn't seem to interact well with the bullets.
					// Table messes up vertical alignment of the bullets.
					// Bullets are therefore disabled (didn't look great anyway).
					return "<li>" .
						'<table class="searchResultImage">' .
						'<tr>' .
						'<td style="width: 120px; text-align: center; vertical-align: top;">' .
						$thumb->toHtml( array( 'desc-link' => true ) ) .
						'</td>' .
						'<td style="vertical-align: top;">' .
						"{$link} {$redirect} {$category} {$section} {$fileMatch}" .
						$extract .
						"<div class='mw-search-result-data'>{$desc} - {$date}</div>" .
						'</td>' .
						'</tr>' .
						'</table>' .
						"</li>\n";
				}
			}
		}

		$html = null;

		$score = '';
		if ( Hooks::run( 'ShowSearchHit', array(
			$this, $result, $terms,
			&$link, &$redirect, &$section, &$extract,
			&$score, &$size, &$date, &$related,
			&$html
		) ) ) {
			$html = "<li><div class='mw-search-result-heading'>" .
				"{$link} {$redirect} {$category} {$section} {$fileMatch}</div> {$extract}\n" .
				"<div class='mw-search-result-data'>{$size} - {$date}</div>" .
				"</li>\n";
		}

		return $html;
	}

	/**
	 * Show results from other wikis
	 *
	 * @param SearchResultSet|array $matches
	 * @param string $query
	 *
	 * @return string
	 */
	protected function showInterwiki( $matches, $query ) {
		global $wgContLang;

		$out = "<div id='mw-search-interwiki'><div id='mw-search-interwiki-caption'>" .
			$this->msg( 'search-interwiki-caption' )->text() . "</div>\n";
		$out .= "<ul class='mw-search-iwresults'>\n";

		// work out custom project captions
		$customCaptions = array();
		// format per line <iwprefix>:<caption>
		$customLines = explode( "\n", $this->msg( 'search-interwiki-custom' )->text() );
		foreach ( $customLines as $line ) {
			$parts = explode( ":", $line, 2 );
			if ( count( $parts ) == 2 ) { // validate line
				$customCaptions[$parts[0]] = $parts[1];
			}
		}

		if ( !is_array( $matches ) ) {
			$matches = array( $matches );
		}

		foreach ( $matches as $set ) {
			$prev = null;
			$result = $set->next();
			while ( $result ) {
				$out .= $this->showInterwikiHit( $result, $prev, $query, $customCaptions );
				$prev = $result->getInterwikiPrefix();
				$result = $set->next();
			}
		}

		// @todo Should support paging in a non-confusing way (not sure how though, maybe via ajax)..
		$out .= "</ul></div>\n";

		// convert the whole thing to desired language variant
		$out = $wgContLang->convert( $out );

		return $out;
	}

	/**
	 * Show single interwiki link
	 *
	 * @param SearchResult $result
	 * @param string $lastInterwiki
	 * @param string $query
	 * @param array $customCaptions Interwiki prefix -> caption
	 *
	 * @return string
	 */
	protected function showInterwikiHit( $result, $lastInterwiki, $query, $customCaptions ) {

		if ( $result->isBrokenTitle() ) {
			return '';
		}

		$title = $result->getTitle();

		$titleSnippet = $result->getTitleSnippet();

		if ( $titleSnippet == '' ) {
			$titleSnippet = null;
		}

		$link = Linker::linkKnown(
			$title,
			$titleSnippet
		);

		// format redirect if any
		$redirectTitle = $result->getRedirectTitle();
		$redirectText = $result->getRedirectSnippet();
		$redirect = '';
		if ( !is_null( $redirectTitle ) ) {
			if ( $redirectText == '' ) {
				$redirectText = null;
			}

			$redirect = "<span class='searchalttitle'>" .
				$this->msg( 'search-redirect' )->rawParams(
					Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
				"</span>";
		}

		$out = "";
		// display project name
		if ( is_null( $lastInterwiki ) || $lastInterwiki != $title->getInterwiki() ) {
			if ( array_key_exists( $title->getInterwiki(), $customCaptions ) ) {
				// captions from 'search-interwiki-custom'
				$caption = $customCaptions[$title->getInterwiki()];
			} else {
				// default is to show the hostname of the other wiki which might suck
				// if there are many wikis on one hostname
				$parsed = wfParseUrl( $title->getFullURL() );
				$caption = $this->msg( 'search-interwiki-default', $parsed['host'] )->text();
			}
			// "more results" link (special page stuff could be localized, but we might not know target lang)
			$searchTitle = Title::newFromText( $title->getInterwiki() . ":Special:Search" );
			$searchLink = Linker::linkKnown(
				$searchTitle,
				$this->msg( 'search-interwiki-more' )->text(),
				array(),
				array(
					'search' => $query,
					'fulltext' => 'Search'
				)
			);
			$out .= "</ul><div class='mw-search-interwiki-project'><span class='mw-search-interwiki-more'>
				{$searchLink}</span>{$caption}</div>\n<ul>";
		}

		$out .= "<li>{$link} {$redirect}</li>\n";

		return $out;
	}

	/**
	 * Generates the power search box at [[Special:Search]]
	 *
	 * @param string $term Search term
	 * @param array $opts
	 * @return string HTML form
	 */
	protected function powerSearchBox( $term, $opts ) {
		global $wgContLang;

		// Groups namespaces into rows according to subject
		$rows = array();
		foreach ( SearchEngine::searchableNamespaces() as $namespace => $name ) {
			$subject = MWNamespace::getSubject( $namespace );
			if ( !array_key_exists( $subject, $rows ) ) {
				$rows[$subject] = "";
			}

			$name = $wgContLang->getConverter()->convertNamespace( $namespace );
			if ( $name == '' ) {
				$name = $this->msg( 'blanknamespace' )->text();
			}

			$rows[$subject] .=
				Xml::openElement( 'td' ) .
				Xml::checkLabel(
					$name,
					"ns{$namespace}",
					"mw-search-ns{$namespace}",
					in_array( $namespace, $this->namespaces )
				) .
				Xml::closeElement( 'td' );
		}

		$rows = array_values( $rows );
		$numRows = count( $rows );

		// Lays out namespaces in multiple floating two-column tables so they'll
		// be arranged nicely while still accommodating different screen widths
		$namespaceTables = '';
		for ( $i = 0; $i < $numRows; $i += 4 ) {
			$namespaceTables .= Xml::openElement( 'table' );

			for ( $j = $i; $j < $i + 4 && $j < $numRows; $j++ ) {
				$namespaceTables .= Xml::tags( 'tr', null, $rows[$j] );
			}

			$namespaceTables .= Xml::closeElement( 'table' );
		}

		$showSections = array( 'namespaceTables' => $namespaceTables );

		Hooks::run( 'SpecialSearchPowerBox', array( &$showSections, $term, $opts ) );

		$hidden = '';
		foreach ( $opts as $key => $value ) {
			$hidden .= Html::hidden( $key, $value );
		}

		# Stuff to feed saveNamespaces()
		$remember = '';
		$user = $this->getUser();
		if ( $user->isLoggedIn() ) {
			$remember .= Xml::checkLabel(
				$this->msg( 'powersearch-remember' )->text(),
				'nsRemember',
				'mw-search-powersearch-remember',
				false,
				// The token goes here rather than in a hidden field so it
				// is only sent when necessary (not every form submission).
				array( 'value' => $user->getEditToken(
					'searchnamespace',
					$this->getRequest()
				) )
			);
		}

		// Return final output
		return Xml::openElement( 'fieldset', array( 'id' => 'mw-searchoptions' ) ) .
			Xml::element( 'legend', null, $this->msg( 'powersearch-legend' )->text() ) .
			Xml::tags( 'h4', null, $this->msg( 'powersearch-ns' )->parse() ) .
			Xml::element( 'div', array( 'id' => 'mw-search-togglebox' ), '', false ) .
			Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
			implode( Xml::element( 'div', array( 'class' => 'divider' ), '', false ), $showSections ) .
			$hidden .
			Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
			$remember .
			Xml::closeElement( 'fieldset' );
	}

	/**
	 * @return array
	 */
	protected function getSearchProfiles() {
		// Builds list of Search Types (profiles)
		$nsAllSet = array_keys( SearchEngine::searchableNamespaces() );

		$profiles = array(
			'default' => array(
				'message' => 'searchprofile-articles',
				'tooltip' => 'searchprofile-articles-tooltip',
				'namespaces' => SearchEngine::defaultNamespaces(),
				'namespace-messages' => SearchEngine::namespacesAsText(
					SearchEngine::defaultNamespaces()
				),
			),
			'images' => array(
				'message' => 'searchprofile-images',
				'tooltip' => 'searchprofile-images-tooltip',
				'namespaces' => array( NS_FILE ),
			),
			'all' => array(
				'message' => 'searchprofile-everything',
				'tooltip' => 'searchprofile-everything-tooltip',
				'namespaces' => $nsAllSet,
			),
			'advanced' => array(
				'message' => 'searchprofile-advanced',
				'tooltip' => 'searchprofile-advanced-tooltip',
				'namespaces' => self::NAMESPACES_CURRENT,
			)
		);

		Hooks::run( 'SpecialSearchProfiles', array( &$profiles ) );

		foreach ( $profiles as &$data ) {
			if ( !is_array( $data['namespaces'] ) ) {
				continue;
			}
			sort( $data['namespaces'] );
		}

		return $profiles;
	}

	/**
	 * @param string $term
	 * @return string
	 */
	protected function searchProfileTabs( $term ) {
		$out = Xml::openElement( 'div', array( 'class' => 'mw-search-profile-tabs' ) );

		$bareterm = $term;
		if ( $this->startsWithImage( $term ) ) {
			// Deletes prefixes
			$bareterm = substr( $term, strpos( $term, ':' ) + 1 );
		}

		$profiles = $this->getSearchProfiles();
		$lang = $this->getLanguage();

		// Outputs XML for Search Types
		$out .= Xml::openElement( 'div', array( 'class' => 'search-types' ) );
		$out .= Xml::openElement( 'ul' );
		foreach ( $profiles as $id => $profile ) {
			if ( !isset( $profile['parameters'] ) ) {
				$profile['parameters'] = array();
			}
			$profile['parameters']['profile'] = $id;

			$tooltipParam = isset( $profile['namespace-messages'] ) ?
				$lang->commaList( $profile['namespace-messages'] ) : null;
			$out .= Xml::tags(
				'li',
				array(
					'class' => $this->profile === $id ? 'current' : 'normal'
				),
				$this->makeSearchLink(
					$bareterm,
					array(),
					$this->msg( $profile['message'] )->text(),
					$this->msg( $profile['tooltip'], $tooltipParam )->text(),
					$profile['parameters']
				)
			);
		}
		$out .= Xml::closeElement( 'ul' );
		$out .= Xml::closeElement( 'div' );
		$out .= Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
		$out .= Xml::closeElement( 'div' );

		return $out;
	}

	/**
	 * @param string $term Search term
	 * @return string
	 */
	protected function searchOptions( $term ) {
		$out = '';
		$opts = array();
		$opts['profile'] = $this->profile;

		if ( $this->isPowerSearch() ) {
			$out .= $this->powerSearchBox( $term, $opts );
		} else {
			$form = '';
			Hooks::run( 'SpecialSearchProfileForm', array( $this, &$form, $this->profile, $term, $opts ) );
			$out .= $form;
		}

		return $out;
	}

	/**
	 * @param string $term
	 * @param int $resultsShown
	 * @param int $totalNum
	 * @return string
	 */
	protected function shortDialog( $term, $resultsShown, $totalNum ) {
		$out = Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() );
		$out .= Html::hidden( 'profile', $this->profile ) . "\n";
		// Term box
		$out .= Html::input( 'search', $term, 'search', array(
			'id' => $this->isPowerSearch() ? 'powerSearchText' : 'searchText',
			'size' => '50',
			'autofocus' => trim( $term ) === '',
			'class' => 'mw-ui-input mw-ui-input-inline',
		) ) . "\n";
		$out .= Html::hidden( 'fulltext', 'Search' ) . "\n";
		$out .= Html::submitButton(
			$this->msg( 'searchbutton' )->text(),
			array( 'class' => 'mw-ui-button mw-ui-progressive' ),
			array( 'mw-ui-progressive' )
		) . "\n";

		// Results-info
		if ( $totalNum > 0 && $this->offset < $totalNum ) {
			$top = $this->msg( 'search-showingresults' )
				->numParams( $this->offset + 1, $this->offset + $resultsShown, $totalNum )
				->numParams( $resultsShown )
				->parse();
			$out .= Xml::tags( 'div', array( 'class' => 'results-info' ), $top ) .
				Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
		}

		return $out;
	}

	/**
	 * Make a search link with some target namespaces
	 *
	 * @param string $term
	 * @param array $namespaces Ignored
	 * @param string $label Link's text
	 * @param string $tooltip Link's tooltip
	 * @param array $params Query string parameters
	 * @return string HTML fragment
	 */
	protected function makeSearchLink( $term, $namespaces, $label, $tooltip, $params = array() ) {
		$opt = $params;
		foreach ( $namespaces as $n ) {
			$opt['ns' . $n] = 1;
		}

		$stParams = array_merge(
			array(
				'search' => $term,
				'fulltext' => $this->msg( 'search' )->text()
			),
			$opt
		);

		return Xml::element(
			'a',
			array(
				'href' => $this->getPageTitle()->getLocalURL( $stParams ),
				'title' => $tooltip
			),
			$label
		);
	}

	/**
	 * Check if query starts with image: prefix
	 *
	 * @param string $term The string to check
	 * @return bool
	 */
	protected function startsWithImage( $term ) {
		global $wgContLang;

		$parts = explode( ':', $term );
		if ( count( $parts ) > 1 ) {
			return $wgContLang->getNsIndex( $parts[0] ) == NS_FILE;
		}

		return false;
	}

	/**
	 * Check if query starts with all: prefix
	 *
	 * @param string $term The string to check
	 * @return bool
	 */
	protected function startsWithAll( $term ) {

		$allkeyword = $this->msg( 'searchall' )->inContentLanguage()->text();

		$parts = explode( ':', $term );
		if ( count( $parts ) > 1 ) {
			return $parts[0] == $allkeyword;
		}

		return false;
	}

	/**
	 * @since 1.18
	 *
	 * @return SearchEngine
	 */
	public function getSearchEngine() {
		if ( $this->searchEngine === null ) {
			$this->searchEngine = $this->searchEngineType ?
				SearchEngine::create( $this->searchEngineType ) : SearchEngine::create();
		}

		return $this->searchEngine;
	}

	/**
	 * Current search profile.
	 * @return null|string
	 */
	function getProfile() {
		return $this->profile;
	}

	/**
	 * Current namespaces.
	 * @return array
	 */
	function getNamespaces() {
		return $this->namespaces;
	}

	/**
	 * Users of hook SpecialSearchSetupEngine can use this to
	 * add more params to links to not lose selection when
	 * user navigates search results.
	 * @since 1.18
	 *
	 * @param string $key
	 * @param mixed $value
	 */
	public function setExtraParam( $key, $value ) {
		$this->extraParams[$key] = $value;
	}

	protected function getGroupName() {
		return 'pages';
	}
}