includes/specials/SpecialSearch.php

   1 <?php
   2 /**
   3  * Implements Special:Search
   4  *
   5  * Copyright © 2004 Brion Vibber <brion@pobox.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  * @ingroup SpecialPage
  24  */
  25
  26 /**
  27  * implements Special:Search - Run text & title search and display the output
  28  * @ingroup SpecialPage
  29  */
  30 class SpecialSearch extends SpecialPage {
  31         /**
  32          * Current search profile. Search profile is just a name that identifies
  33          * the active search tab on the search page (content, help, discussions...)
  34          * For users tt replaces the set of enabled namespaces from the query
  35          * string when applicable. Extensions can add new profiles with hooks
  36          * with custom search options just for that profile.
  37          * null|string
  38          */
  39         protected $profile;
  40
  41         /// Search engine
  42         protected $searchEngine;
  43
  44         /// For links
  45         protected $extraParams = array();
  46
  47         /// No idea, apparently used by some other classes
  48         protected $mPrefix;
  49
  50         /**
  51          * @var int
  52          */
  53         protected $limit, $offset;
  54
  55         /**
  56          * @var array
  57          */
  58         protected $namespaces;
  59
  60         /**
  61          * @var bool
  62          */
  63         protected $searchRedirects;
  64
  65         /**
  66          * @var string
  67          */
  68         protected $didYouMeanHtml, $fulltext;
  69
  70         const NAMESPACES_CURRENT = 'sense';
  71
  72         public function __construct() {
  73                 parent::__construct( 'Search' );
  74         }
  75
  76         /**
  77          * Entry point
  78          *
  79          * @param $par String or null
  80          */
  81         public function execute( $par ) {
  82                 $this->setHeaders();
  83                 $this->outputHeader();
  84                 $out = $this->getOutput();
  85                 $out->allowClickjacking();
  86                 $out->addModuleStyles( 'mediawiki.special' );
  87
  88                 // Strip underscores from title parameter; most of the time we'll want
  89                 // text form here. But don't strip underscores from actual text params!
  90                 $titleParam = str_replace( '_', ' ', $par );
  91
  92                 $request = $this->getRequest();
  93
  94                 // Fetch the search term
  95                 $search = str_replace( "\n", " ", $request->getText( 'search', $titleParam ) );
  96
  97                 $this->load();
  98
  99                 if ( $request->getVal( 'fulltext' )
 100                         || !is_null( $request->getVal( 'offset' ) )
 101                         || !is_null( $request->getVal( 'searchx' ) ) )
 102                 {
 103                         $this->showResults( $search );
 104                 } else {
 105                         $this->goResult( $search );
 106                 }
 107         }
 108
 109         /**
 110          * Set up basic search parameters from the request and user settings.
 111          */
 112         public function load() {
 113                 $request = $this->getRequest();
 114                 list( $this->limit, $this->offset ) = $request->getLimitOffset( 20, 'searchlimit' );
 115                 $this->mPrefix = $request->getVal( 'prefix', '' );
 116
 117                 $user = $this->getUser();
 118                 # Extract manually requested namespaces
 119                 $nslist = $this->powerSearch( $request );
 120                 $this->profile = $profile = $request->getVal( 'profile', null );
 121                 $profiles = $this->getSearchProfiles();
 122                 if ( $profile === null) {
 123                         // BC with old request format
 124                         $this->profile = 'advanced';
 125                         if ( count( $nslist ) ) {
 126                                 foreach( $profiles as $key => $data ) {
 127                                         if ( $nslist === $data['namespaces'] && $key !== 'advanced') {
 128                                                 $this->profile = $key;
 129                                         }
 130                                 }
 131                                 $this->namespaces = $nslist;
 132                         } else {
 133                                 $this->namespaces = SearchEngine::userNamespaces( $user );
 134                         }
 135                 } elseif ( $profile === 'advanced' ) {
 136                         $this->namespaces = $nslist;
 137                 } else {
 138                         if ( isset( $profiles[$profile]['namespaces'] ) ) {
 139                                 $this->namespaces = $profiles[$profile]['namespaces'];
 140                         } else {
 141                                 // Unknown profile requested
 142                                 $this->profile = 'default';
 143                                 $this->namespaces = $profiles['default']['namespaces'];
 144                         }
 145                 }
 146
 147                 // Redirects defaults to true, but we don't know whether it was ticked of or just missing
 148                 $default = $request->getBool( 'profile' ) ? 0 : 1;
 149                 $this->searchRedirects = $request->getBool( 'redirs', $default ) ? 1 : 0;
 150                 $this->didYouMeanHtml = ''; # html of did you mean... link
 151                 $this->fulltext = $request->getVal('fulltext');
 152         }
 153
 154         /**
 155          * If an exact title match can be found, jump straight ahead to it.
 156          *
 157          * @param $term String
 158          */
 159         public function goResult( $term ) {
 160                 $this->setupPage( $term );
 161                 # Try to go to page as entered.
 162                 $t = Title::newFromText( $term );
 163                 # If the string cannot be used to create a title
 164                 if( is_null( $t ) ) {
 165                         return $this->showResults( $term );
 166                 }
 167                 # If there's an exact or very near match, jump right there.
 168                 $t = SearchEngine::getNearMatch( $term );
 169
 170                 if ( !wfRunHooks( 'SpecialSearchGo', array( &$t, &$term ) ) ) {
 171                         # Hook requested termination
 172                         return;
 173                 }
 174
 175                 if( !is_null( $t ) ) {
 176                         $this->getOutput()->redirect( $t->getFullURL() );
 177                         return;
 178                 }
 179                 # No match, generate an edit URL
 180                 $t = Title::newFromText( $term );
 181                 if( !is_null( $t ) ) {
 182                         global $wgGoToEdit;
 183                         wfRunHooks( 'SpecialSearchNogomatch', array( &$t ) );
 184                         wfDebugLog( 'nogomatch', $t->getText(), false );
 185
 186                         # If the feature is enabled, go straight to the edit page
 187                         if( $wgGoToEdit ) {
 188                                 $this->getOutput()->redirect( $t->getFullURL( array( 'action' => 'edit' ) ) );
 189                                 return;
 190                         }
 191                 }
 192                 return $this->showResults( $term );
 193         }
 194
 195         /**
 196          * @param $term String
 197          */
 198         public function showResults( $term ) {
 199                 global $wgDisableTextSearch, $wgSearchForwardUrl, $wgContLang, $wgScript;
 200                 wfProfileIn( __METHOD__ );
 201
 202                 $search = $this->getSearchEngine();
 203                 $search->setLimitOffset( $this->limit, $this->offset );
 204                 $search->setNamespaces( $this->namespaces );
 205                 $search->showRedirects = $this->searchRedirects; // BC
 206                 $search->setFeatureData( 'list-redirects', $this->searchRedirects );
 207                 $search->prefix = $this->mPrefix;
 208                 $term = $search->transformSearchTerm($term);
 209
 210                 wfRunHooks( 'SpecialSearchSetupEngine', array( $this, $this->profile, $search ) );
 211
 212                 $this->setupPage( $term );
 213
 214                 $out = $this->getOutput();
 215
 216                 if ( $wgDisableTextSearch ) {
 217                         if ( $wgSearchForwardUrl ) {
 218                                 $url = str_replace( '$1', urlencode( $term ), $wgSearchForwardUrl );
 219                                 $out->redirect( $url );
 220                         } else {
 221                                 $out->addHTML(
 222                                         Xml::openElement( 'fieldset' ) .
 223                                         Xml::element( 'legend', null, wfMsg( 'search-external' ) ) .
 224                                         Xml::element( 'p', array( 'class' => 'mw-searchdisabled' ), wfMsg( 'searchdisabled' ) ) .
 225                                         wfMsg( 'googlesearch',
 226                                                 htmlspecialchars( $term ),
 227                                                 htmlspecialchars( 'UTF-8' ),
 228                                                 htmlspecialchars( wfMsg( 'searchbutton' ) )
 229                                         ) .
 230                                         Xml::closeElement( 'fieldset' )
 231                                 );
 232                         }
 233                         wfProfileOut( __METHOD__ );
 234                         return;
 235                 }
 236
 237                 $t = Title::newFromText( $term );
 238
 239                 // fetch search results
 240                 $rewritten = $search->replacePrefixes($term);
 241
 242                 $titleMatches = $search->searchTitle( $rewritten );
 243                 if( !( $titleMatches instanceof SearchResultTooMany ) ) {
 244                         $textMatches = $search->searchText( $rewritten );
 245                 }
 246
 247                 // did you mean... suggestions
 248                 if( $textMatches && $textMatches->hasSuggestion() ) {
 249                         $st = SpecialPage::getTitleFor( 'Search' );
 250
 251                         # mirror Go/Search behaviour of original request ..
 252                         $didYouMeanParams = array( 'search' => $textMatches->getSuggestionQuery() );
 253
 254                         if( $this->fulltext != null ) {
 255                                 $didYouMeanParams['fulltext'] = $this->fulltext;
 256                         }
 257
 258                         $stParams = array_merge(
 259                                 $didYouMeanParams,
 260                                 $this->powerSearchOptions()
 261                         );
 262
 263                         $suggestionSnippet = $textMatches->getSuggestionSnippet();
 264
 265                         if( $suggestionSnippet == '' ) {
 266                                 $suggestionSnippet = null;
 267                         }
 268
 269                         $suggestLink = Linker::linkKnown(
 270                                 $st,
 271                                 $suggestionSnippet,
 272                                 array(),
 273                                 $stParams
 274                         );
 275
 276                         $this->didYouMeanHtml = '<div class="searchdidyoumean">'.wfMsg('search-suggest',$suggestLink).'</div>';
 277                 }
 278                 // start rendering the page
 279                 $out->addHtml(
 280                         Xml::openElement(
 281                                 'form',
 282                                 array(
 283                                         'id' => ( $this->profile === 'advanced' ? 'powersearch' : 'search' ),
 284                                         'method' => 'get',
 285                                         'action' => $wgScript
 286                                 )
 287                         )
 288                 );
 289                 $out->addHtml(
 290                         Xml::openElement( 'table', array( 'id'=>'mw-search-top-table', 'border'=>0, 'cellpadding'=>0, 'cellspacing'=>0 ) ) .
 291                         Xml::openElement( 'tr' ) .
 292                         Xml::openElement( 'td' ) . "\n" .
 293                         $this->shortDialog( $term ) .
 294                         Xml::closeElement('td') .
 295                         Xml::closeElement('tr') .
 296                         Xml::closeElement('table')
 297                 );
 298
 299                 // Sometimes the search engine knows there are too many hits
 300                 if( $titleMatches instanceof SearchResultTooMany ) {
 301                         $out->wrapWikiMsg( "==$1==\n", 'toomanymatches' );
 302                         wfProfileOut( __METHOD__ );
 303                         return;
 304                 }
 305
 306                 $filePrefix = $wgContLang->getFormattedNsText(NS_FILE).':';
 307                 if( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
 308                         $out->addHTML( $this->formHeader( $term, 0, 0 ) );
 309                         $out->addHtml( $this->getProfileForm( $this->profile, $term ) );
 310                         $out->addHTML( '</form>' );
 311                         // Empty query -- straight view of search form
 312                         wfProfileOut( __METHOD__ );
 313                         return;
 314                 }
 315
 316                 // Get number of results
 317                 $titleMatchesNum = $titleMatches ? $titleMatches->numRows() : 0;
 318                 $textMatchesNum = $textMatches ? $textMatches->numRows() : 0;
 319                 // Total initial query matches (possible false positives)
 320                 $num = $titleMatchesNum + $textMatchesNum;
 321
 322                 // Get total actual results (after second filtering, if any)
 323                 $numTitleMatches = $titleMatches && !is_null( $titleMatches->getTotalHits() ) ?
 324                         $titleMatches->getTotalHits() : $titleMatchesNum;
 325                 $numTextMatches = $textMatches && !is_null( $textMatches->getTotalHits() ) ?
 326                         $textMatches->getTotalHits() : $textMatchesNum;
 327
 328                 // get total number of results if backend can calculate it
 329                 $totalRes = 0;
 330                 if($titleMatches && !is_null( $titleMatches->getTotalHits() ) )
 331                         $totalRes += $titleMatches->getTotalHits();
 332                 if($textMatches && !is_null( $textMatches->getTotalHits() ))
 333                         $totalRes += $textMatches->getTotalHits();
 334
 335                 // show number of results and current offset
 336                 $out->addHTML( $this->formHeader( $term, $num, $totalRes ) );
 337                 $out->addHtml( $this->getProfileForm( $this->profile, $term ) );
 338
 339
 340                 $out->addHtml( Xml::closeElement( 'form' ) );
 341                 $out->addHtml( "<div class='searchresults'>" );
 342
 343                 // prev/next links
 344                 if( $num || $this->offset ) {
 345                         // Show the create link ahead
 346                         $this->showCreateLink( $t );
 347                         $prevnext = $this->getLanguage()->viewPrevNext( $this->getTitle(), $this->offset, $this->limit,
 348                                 $this->powerSearchOptions() + array( 'search' => $term ),
 349                                 max( $titleMatchesNum, $textMatchesNum ) < $this->limit
 350                         );
 351                         //$out->addHTML( "<p class='mw-search-pager-top'>{$prevnext}</p>\n" );
 352                         wfRunHooks( 'SpecialSearchResults', array( $term, &$titleMatches, &$textMatches ) );
 353                 } else {
 354                         wfRunHooks( 'SpecialSearchNoResults', array( $term ) );
 355                 }
 356
 357                 $out->parserOptions()->setEditSection( false );
 358                 if( $titleMatches ) {
 359                         if( $numTitleMatches > 0 ) {
 360                                 $out->wrapWikiMsg( "==$1==\n", 'titlematches' );
 361                                 $out->addHTML( $this->showMatches( $titleMatches ) );
 362                         }
 363                         $titleMatches->free();
 364                 }
 365                 if( $textMatches ) {
 366                         // output appropriate heading
 367                         if( $numTextMatches > 0 && $numTitleMatches > 0 ) {
 368                                 // if no title matches the heading is redundant
 369                                 $out->wrapWikiMsg( "==$1==\n", 'textmatches' );
 370                         } elseif( $totalRes == 0 ) {
 371                                 # Don't show the 'no text matches' if we received title matches
 372                                 # $out->wrapWikiMsg( "==$1==\n", 'notextmatches' );
 373                         }
 374                         // show interwiki results if any
 375                         if( $textMatches->hasInterwikiResults() ) {
 376                                 $out->addHTML( $this->showInterwiki( $textMatches->getInterwikiResults(), $term ) );
 377                         }
 378                         // show results
 379                         if( $numTextMatches > 0 ) {
 380                                 $out->addHTML( $this->showMatches( $textMatches ) );
 381                         }
 382
 383                         $textMatches->free();
 384                 }
 385                 if( $num === 0 ) {
 386                         $out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>", array( 'search-nonefound', wfEscapeWikiText( $term ) ) );
 387                         $this->showCreateLink( $t );
 388                 }
 389                 $out->addHtml( "</div>" );
 390
 391                 if( $num || $this->offset ) {
 392                         $out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
 393                 }
 394                 wfProfileOut( __METHOD__ );
 395         }
 396
 397         /**
 398          * @param $t Title
 399          */
 400         protected function showCreateLink( $t ) {
 401                 // show direct page/create link if applicable
 402
 403                 // Check DBkey !== '' in case of fragment link only.
 404                 if( is_null( $t ) || $t->getDBkey() === '' ) {
 405                         // invalid title
 406                         // preserve the paragraph for margins etc...
 407                         $this->getOutput()->addHtml( '<p></p>' );
 408                         return;
 409                 }
 410
 411                 if( $t->isKnown() ) {
 412                         $messageName = 'searchmenu-exists';
 413                 } elseif( $t->userCan( 'create' ) ) {
 414                         $messageName = 'searchmenu-new';
 415                 } else {
 416                         $messageName = 'searchmenu-new-nocreate';
 417                 }
 418                 $params = array( $messageName, wfEscapeWikiText( $t->getPrefixedText() ) );
 419                 wfRunHooks( 'SpecialSearchCreateLink', array( $t, &$params ) );
 420
 421                 // Extensions using the hook might still return an empty $messageName
 422                 if( $messageName ) {
 423                         $this->getOutput()->wrapWikiMsg( "<p class=\"mw-search-createlink\">\n$1</p>", $params );
 424                 } else {
 425                         // preserve the paragraph for margins etc...
 426                         $this->getOutput()->addHtml( '<p></p>' );
 427                 }
 428         }
 429
 430         /**
 431          * @param $term string
 432          */
 433         protected function setupPage( $term ) {
 434                 # Should advanced UI be used?
 435                 $this->searchAdvanced = ($this->profile === 'advanced');
 436                 $out = $this->getOutput();
 437                 if( strval( $term ) !== ''  ) {
 438                         $out->setPageTitle( $this->msg( 'searchresults' ) );
 439                         $out->setHTMLTitle( $this->msg( 'pagetitle', $this->msg( 'searchresults-title', $term )->plain() ) );
 440                 }
 441                 // add javascript specific to special:search
 442                 $out->addModules( 'mediawiki.special.search' );
 443         }
 444
 445         /**
 446          * Extract "power search" namespace settings from the request object,
 447          * returning a list of index numbers to search.
 448          *
 449          * @param $request WebRequest
 450          * @return Array
 451          */
 452         protected function powerSearch( &$request ) {
 453                 $arr = array();
 454                 foreach( SearchEngine::searchableNamespaces() as $ns => $name ) {
 455                         if( $request->getCheck( 'ns' . $ns ) ) {
 456                                 $arr[] = $ns;
 457                         }
 458                 }
 459
 460                 return $arr;
 461         }
 462
 463         /**
 464          * Reconstruct the 'power search' options for links
 465          *
 466          * @return Array
 467          */
 468         protected function powerSearchOptions() {
 469                 $opt = array();
 470                 $opt['redirs'] = $this->searchRedirects ? 1 : 0;
 471                 if( $this->profile !== 'advanced' ) {
 472                         $opt['profile'] = $this->profile;
 473                 } else {
 474                         foreach( $this->namespaces as $n ) {
 475                                 $opt['ns' . $n] = 1;
 476                         }
 477                 }
 478                 return $opt + $this->extraParams;
 479         }
 480
 481         /**
 482          * Show whole set of results
 483          *
 484          * @param $matches SearchResultSet
 485          *
 486          * @return string
 487          */
 488         protected function showMatches( &$matches ) {
 489                 global $wgContLang;
 490                 wfProfileIn( __METHOD__ );
 491
 492                 $terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
 493
 494                 $out = "";
 495                 $infoLine = $matches->getInfo();
 496                 if( !is_null($infoLine) ) {
 497                         $out .= "\n<!-- {$infoLine} -->\n";
 498                 }
 499                 $out .= "<ul class='mw-search-results'>\n";
 500                 $result = $matches->next();
 501                 while( $result ) {
 502                         $out .= $this->showHit( $result, $terms );
 503                         $result = $matches->next();
 504                 }
 505                 $out .= "</ul>\n";
 506
 507                 // convert the whole thing to desired language variant
 508                 $out = $wgContLang->convert( $out );
 509                 wfProfileOut( __METHOD__ );
 510                 return $out;
 511         }
 512
 513         /**
 514          * Format a single hit result
 515          *
 516          * @param $result SearchResult
 517          * @param $terms Array: terms to highlight
 518          *
 519          * @return string
 520          */
 521         protected function showHit( $result, $terms ) {
 522                 wfProfileIn( __METHOD__ );
 523
 524                 if( $result->isBrokenTitle() ) {
 525                         wfProfileOut( __METHOD__ );
 526                         return "<!-- Broken link in search result -->\n";
 527                 }
 528
 529                 $t = $result->getTitle();
 530
 531                 $titleSnippet = $result->getTitleSnippet($terms);
 532
 533                 if( $titleSnippet == '' )
 534                         $titleSnippet = null;
 535
 536                 $link_t = clone $t;
 537
 538                 wfRunHooks( 'ShowSearchHitTitle',
 539                                         array( &$link_t, &$titleSnippet, $result, $terms, $this ) );
 540
 541                 $link = Linker::linkKnown(
 542                         $link_t,
 543                         $titleSnippet
 544                 );
 545
 546                 //If page content is not readable, just return the title.
 547                 //This is not quite safe, but better than showing excerpts from non-readable pages
 548                 //Note that hiding the entry entirely would screw up paging.
 549                 if( !$t->userCan( 'read' ) ) {
 550                         wfProfileOut( __METHOD__ );
 551                         return "<li>{$link}</li>\n";
 552                 }
 553
 554                 // If the page doesn't *exist*... our search index is out of date.
 555                 // The least confusing at this point is to drop the result.
 556                 // You may get less results, but... oh well. :P
 557                 if( $result->isMissingRevision() ) {
 558                         wfProfileOut( __METHOD__ );
 559                         return "<!-- missing page " . htmlspecialchars( $t->getPrefixedText() ) . "-->\n";
 560                 }
 561
 562                 // format redirects / relevant sections
 563                 $redirectTitle = $result->getRedirectTitle();
 564                 $redirectText = $result->getRedirectSnippet($terms);
 565                 $sectionTitle = $result->getSectionTitle();
 566                 $sectionText = $result->getSectionSnippet($terms);
 567                 $redirect = '';
 568
 569                 if( !is_null($redirectTitle) ) {
 570                         if( $redirectText == '' )
 571                                 $redirectText = null;
 572
 573                         $redirect = "<span class='searchalttitle'>" .
 574                                 wfMsg(
 575                                         'search-redirect',
 576                                         Linker::linkKnown(
 577                                                 $redirectTitle,
 578                                                 $redirectText
 579                                         )
 580                                 ) .
 581                                 "</span>";
 582                 }
 583
 584                 $section = '';
 585
 586                 if( !is_null($sectionTitle) ) {
 587                         if( $sectionText == '' )
 588                                 $sectionText = null;
 589
 590                         $section = "<span class='searchalttitle'>" .
 591                                 wfMsg(
 592                                         'search-section', Linker::linkKnown(
 593                                                 $sectionTitle,
 594                                                 $sectionText
 595                                         )
 596                                 ) .
 597                                 "</span>";
 598                 }
 599
 600                 // format text extract
 601                 $extract = "<div class='searchresult'>".$result->getTextSnippet($terms)."</div>";
 602
 603                 $lang = $this->getLanguage();
 604
 605                 // format score
 606                 if( is_null( $result->getScore() ) ) {
 607                         // Search engine doesn't report scoring info
 608                         $score = '';
 609                 } else {
 610                         $percent = sprintf( '%2.1f', $result->getScore() * 100 );
 611                         $score = wfMsg( 'search-result-score', $lang->formatNum( $percent ) )
 612                                 . ' - ';
 613                 }
 614
 615                 // format description
 616                 $byteSize = $result->getByteSize();
 617                 $wordCount = $result->getWordCount();
 618                 $timestamp = $result->getTimestamp();
 619                 $size = wfMsgExt(
 620                         'search-result-size',
 621                         array( 'parsemag', 'escape' ),
 622                         $lang->formatSize( $byteSize ),
 623                         $lang->formatNum( $wordCount )
 624                 );
 625
 626                 if( $t->getNamespace() == NS_CATEGORY ) {
 627                         $cat = Category::newFromTitle( $t );
 628                         $size = wfMsgExt(
 629                                 'search-result-category-size',
 630                                 array( 'parsemag', 'escape' ),
 631                                 $lang->formatNum( $cat->getPageCount() ),
 632                                 $lang->formatNum( $cat->getSubcatCount() ),
 633                                 $lang->formatNum( $cat->getFileCount() )
 634                         );
 635                 }
 636
 637                 $date = $lang->timeanddate( $timestamp );
 638
 639                 // link to related articles if supported
 640                 $related = '';
 641                 if( $result->hasRelated() ) {
 642                         $st = SpecialPage::getTitleFor( 'Search' );
 643                         $stParams = array_merge(
 644                                 $this->powerSearchOptions(),
 645                                 array(
 646                                         'search' => wfMsgForContent( 'searchrelated' ) . ':' . $t->getPrefixedText(),
 647                                         'fulltext' => wfMsg( 'search' )
 648                                 )
 649                         );
 650
 651                         $related = ' -- ' . Linker::linkKnown(
 652                                 $st,
 653                                 wfMsg('search-relatedarticle'),
 654                                 array(),
 655                                 $stParams
 656                         );
 657                 }
 658
 659                 // Include a thumbnail for media files...
 660                 if( $t->getNamespace() == NS_FILE ) {
 661                         $img = wfFindFile( $t );
 662                         if( $img ) {
 663                                 $thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
 664                                 if( $thumb ) {
 665                                         $desc = wfMsg( 'parentheses', $img->getShortDesc() );
 666                                         wfProfileOut( __METHOD__ );
 667                                         // Float doesn't seem to interact well with the bullets.
 668                                         // Table messes up vertical alignment of the bullets.
 669                                         // Bullets are therefore disabled (didn't look great anyway).
 670                                         return "<li>" .
 671                                                 '<table class="searchResultImage">' .
 672                                                 '<tr>' .
 673                                                 '<td width="120" align="center" valign="top">' .
 674                                                 $thumb->toHtml( array( 'desc-link' => true ) ) .
 675                                                 '</td>' .
 676                                                 '<td valign="top">' .
 677                                                 $link .
 678                                                 $extract .
 679                                                 "<div class='mw-search-result-data'>{$score}{$desc} - {$date}{$related}</div>" .
 680                                                 '</td>' .
 681                                                 '</tr>' .
 682                                                 '</table>' .
 683                                                 "</li>\n";
 684                                 }
 685                         }
 686                 }
 687
 688                 wfProfileOut( __METHOD__ );
 689                 return "<li><div class='mw-search-result-heading'>{$link} {$redirect} {$section}</div> {$extract}\n" .
 690                         "<div class='mw-search-result-data'>{$score}{$size} - {$date}{$related}</div>" .
 691                         "</li>\n";
 692
 693         }
 694
 695         /**
 696          * Show results from other wikis
 697          *
 698          * @param $matches SearchResultSet
 699          * @param $query String
 700          *
 701          * @return string
 702          */
 703         protected function showInterwiki( &$matches, $query ) {
 704                 global $wgContLang;
 705                 wfProfileIn( __METHOD__ );
 706                 $terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
 707
 708                 $out = "<div id='mw-search-interwiki'><div id='mw-search-interwiki-caption'>".
 709                         wfMsg('search-interwiki-caption')."</div>\n";
 710                 $out .= "<ul class='mw-search-iwresults'>\n";
 711
 712                 // work out custom project captions
 713                 $customCaptions = array();
 714                 $customLines = explode("\n",wfMsg('search-interwiki-custom')); // format per line <iwprefix>:<caption>
 715                 foreach($customLines as $line) {
 716                         $parts = explode(":",$line,2);
 717                         if(count($parts) == 2) // validate line
 718                                 $customCaptions[$parts[0]] = $parts[1];
 719                 }
 720
 721                 $prev = null;
 722                 $result = $matches->next();
 723                 while( $result ) {
 724                         $out .= $this->showInterwikiHit( $result, $prev, $terms, $query, $customCaptions );
 725                         $prev = $result->getInterwikiPrefix();
 726                         $result = $matches->next();
 727                 }
 728                 // TODO: should support paging in a non-confusing way (not sure how though, maybe via ajax)..
 729                 $out .= "</ul></div>\n";
 730
 731                 // convert the whole thing to desired language variant
 732                 $out = $wgContLang->convert( $out );
 733                 wfProfileOut( __METHOD__ );
 734                 return $out;
 735         }
 736
 737         /**
 738          * Show single interwiki link
 739          *
 740          * @param $result SearchResult
 741          * @param $lastInterwiki String
 742          * @param $terms Array
 743          * @param $query String
 744          * @param $customCaptions Array: iw prefix -> caption
 745          *
 746          * @return string
 747          */
 748         protected function showInterwikiHit( $result, $lastInterwiki, $terms, $query, $customCaptions) {
 749                 wfProfileIn( __METHOD__ );
 750
 751                 if( $result->isBrokenTitle() ) {
 752                         wfProfileOut( __METHOD__ );
 753                         return "<!-- Broken link in search result -->\n";
 754                 }
 755
 756                 $t = $result->getTitle();
 757
 758                 $titleSnippet = $result->getTitleSnippet($terms);
 759
 760                 if( $titleSnippet == '' )
 761                         $titleSnippet = null;
 762
 763                 $link = Linker::linkKnown(
 764                         $t,
 765                         $titleSnippet
 766                 );
 767
 768                 // format redirect if any
 769                 $redirectTitle = $result->getRedirectTitle();
 770                 $redirectText = $result->getRedirectSnippet($terms);
 771                 $redirect = '';
 772                 if( !is_null($redirectTitle) ) {
 773                         if( $redirectText == '' )
 774                                 $redirectText = null;
 775
 776                         $redirect = "<span class='searchalttitle'>" .
 777                                 wfMsg(
 778                                         'search-redirect',
 779                                         Linker::linkKnown(
 780                                                 $redirectTitle,
 781                                                 $redirectText
 782                                         )
 783                                 ) .
 784                                 "</span>";
 785                 }
 786
 787                 $out = "";
 788                 // display project name
 789                 if(is_null($lastInterwiki) || $lastInterwiki != $t->getInterwiki()) {
 790                         if( array_key_exists($t->getInterwiki(),$customCaptions) ) {
 791                                 // captions from 'search-interwiki-custom'
 792                                 $caption = $customCaptions[$t->getInterwiki()];
 793                         } else {
 794                                 // default is to show the hostname of the other wiki which might suck
 795                                 // if there are many wikis on one hostname
 796                                 $parsed = wfParseUrl( $t->getFullURL() );
 797                                 $caption = wfMsg('search-interwiki-default', $parsed['host']);
 798                         }
 799                         // "more results" link (special page stuff could be localized, but we might not know target lang)
 800                         $searchTitle = Title::newFromText($t->getInterwiki().":Special:Search");
 801                         $searchLink = Linker::linkKnown(
 802                                 $searchTitle,
 803                                 wfMsg('search-interwiki-more'),
 804                                 array(),
 805                                 array(
 806                                         'search' => $query,
 807                                         'fulltext' => 'Search'
 808                                 )
 809                         );
 810                         $out .= "</ul><div class='mw-search-interwiki-project'><span class='mw-search-interwiki-more'>
 811                                 {$searchLink}</span>{$caption}</div>\n<ul>";
 812                 }
 813
 814                 $out .= "<li>{$link} {$redirect}</li>\n";
 815                 wfProfileOut( __METHOD__ );
 816                 return $out;
 817         }
 818
 819         /**
 820          * @param $profile
 821          * @param $term
 822          * @return String
 823          */
 824         protected function getProfileForm( $profile, $term ) {
 825                 // Hidden stuff
 826                 $opts = array();
 827                 $opts['redirs'] = $this->searchRedirects;
 828                 $opts['profile'] = $this->profile;
 829
 830                 if ( $profile === 'advanced' ) {
 831                         return $this->powerSearchBox( $term, $opts );
 832                 } else {
 833                         $form = '';
 834                         wfRunHooks( 'SpecialSearchProfileForm', array( $this, &$form, $profile, $term, $opts ) );
 835                         return $form;
 836                 }
 837         }
 838
 839         /**
 840          * Generates the power search box at [[Special:Search]]
 841          *
 842          * @param $term String: search term
 843          * @param $opts array
 844          * @return String: HTML form
 845          */
 846         protected function powerSearchBox( $term, $opts ) {
 847                 // Groups namespaces into rows according to subject
 848                 $rows = array();
 849                 foreach( SearchEngine::searchableNamespaces() as $namespace => $name ) {
 850                         $subject = MWNamespace::getSubject( $namespace );
 851                         if( !array_key_exists( $subject, $rows ) ) {
 852                                 $rows[$subject] = "";
 853                         }
 854                         $name = str_replace( '_', ' ', $name );
 855                         if( $name == '' ) {
 856                                 $name = wfMsg( 'blanknamespace' );
 857                         }
 858                         $rows[$subject] .=
 859                                 Xml::openElement(
 860                                         'td', array( 'style' => 'white-space: nowrap' )
 861                                 ) .
 862                                 Xml::checkLabel(
 863                                         $name,
 864                                         "ns{$namespace}",
 865                                         "mw-search-ns{$namespace}",
 866                                         in_array( $namespace, $this->namespaces )
 867                                 ) .
 868                                 Xml::closeElement( 'td' );
 869                 }
 870                 $rows = array_values( $rows );
 871                 $numRows = count( $rows );
 872
 873                 // Lays out namespaces in multiple floating two-column tables so they'll
 874                 // be arranged nicely while still accommodating different screen widths
 875                 $namespaceTables = '';
 876                 for( $i = 0; $i < $numRows; $i += 4 ) {
 877                         $namespaceTables .= Xml::openElement(
 878                                 'table',
 879                                 array( 'cellpadding' => 0, 'cellspacing' => 0, 'border' => 0 )
 880                         );
 881                         for( $j = $i; $j < $i + 4 && $j < $numRows; $j++ ) {
 882                                 $namespaceTables .= Xml::tags( 'tr', null, $rows[$j] );
 883                         }
 884                         $namespaceTables .= Xml::closeElement( 'table' );
 885                 }
 886
 887                 $showSections = array( 'namespaceTables' => $namespaceTables );
 888
 889                 // Show redirects check only if backend supports it
 890                 if( $this->getSearchEngine()->supports( 'list-redirects' ) ) {
 891                         $showSections['redirects'] =
 892                                 Xml::checkLabel( wfMsg( 'powersearch-redir' ), 'redirs', 'redirs', $this->searchRedirects );
 893                 }
 894
 895                 wfRunHooks( 'SpecialSearchPowerBox', array( &$showSections, $term, $opts ) );
 896
 897                 $hidden = '';
 898                 unset( $opts['redirs'] );
 899                 foreach( $opts as $key => $value ) {
 900                         $hidden .= Html::hidden( $key, $value );
 901                 }
 902                 // Return final output
 903                 return
 904                         Xml::openElement(
 905                                 'fieldset',
 906                                 array( 'id' => 'mw-searchoptions', 'style' => 'margin:0em;' )
 907                         ) .
 908                         Xml::element( 'legend', null, wfMsg('powersearch-legend') ) .
 909                         Xml::tags( 'h4', null, wfMsgExt( 'powersearch-ns', array( 'parseinline' ) ) ) .
 910                         Xml::tags(
 911                                 'div',
 912                                 array( 'id' => 'mw-search-togglebox' ),
 913                                 Xml::label( wfMsg( 'powersearch-togglelabel' ), 'mw-search-togglelabel' ) .
 914                                         Xml::element(
 915                                                 'input',
 916                                                 array(
 917                                                         'type'=>'button',
 918                                                         'id' => 'mw-search-toggleall',
 919                                                         'value' => wfMsg( 'powersearch-toggleall' )
 920                                                 )
 921                                         ) .
 922                                         Xml::element(
 923                                                 'input',
 924                                                 array(
 925                                                         'type'=>'button',
 926                                                         'id' => 'mw-search-togglenone',
 927                                                         'value' => wfMsg( 'powersearch-togglenone' )
 928                                                 )
 929                                         )
 930                         ) .
 931                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
 932                         implode( Xml::element( 'div', array( 'class' => 'divider' ), '', false ), $showSections ) .
 933                         $hidden .
 934                         Xml::closeElement( 'fieldset' );
 935         }
 936
 937         /**
 938          * @return array
 939          */
 940         protected function getSearchProfiles() {
 941                 // Builds list of Search Types (profiles)
 942                 $nsAllSet = array_keys( SearchEngine::searchableNamespaces() );
 943
 944                 $profiles = array(
 945                         'default' => array(
 946                                 'message' => 'searchprofile-articles',
 947                                 'tooltip' => 'searchprofile-articles-tooltip',
 948                                 'namespaces' => SearchEngine::defaultNamespaces(),
 949                                 'namespace-messages' => SearchEngine::namespacesAsText(
 950                                         SearchEngine::defaultNamespaces()
 951                                 ),
 952                         ),
 953                         'images' => array(
 954                                 'message' => 'searchprofile-images',
 955                                 'tooltip' => 'searchprofile-images-tooltip',
 956                                 'namespaces' => array( NS_FILE ),
 957                         ),
 958                         'help' => array(
 959                                 'message' => 'searchprofile-project',
 960                                 'tooltip' => 'searchprofile-project-tooltip',
 961                                 'namespaces' => SearchEngine::helpNamespaces(),
 962                                 'namespace-messages' => SearchEngine::namespacesAsText(
 963                                         SearchEngine::helpNamespaces()
 964                                 ),
 965                         ),
 966                         'all' => array(
 967                                 'message' => 'searchprofile-everything',
 968                                 'tooltip' => 'searchprofile-everything-tooltip',
 969                                 'namespaces' => $nsAllSet,
 970                         ),
 971                         'advanced' => array(
 972                                 'message' => 'searchprofile-advanced',
 973                                 'tooltip' => 'searchprofile-advanced-tooltip',
 974                                 'namespaces' => self::NAMESPACES_CURRENT,
 975                         )
 976                 );
 977
 978                 wfRunHooks( 'SpecialSearchProfiles', array( &$profiles ) );
 979
 980                 foreach( $profiles as &$data ) {
 981                         if ( !is_array( $data['namespaces'] ) ) continue;
 982                         sort( $data['namespaces'] );
 983                 }
 984
 985                 return $profiles;
 986         }
 987
 988         /**
 989          * @param $term
 990          * @param $resultsShown
 991          * @param $totalNum
 992          * @return string
 993          */
 994         protected function formHeader( $term, $resultsShown, $totalNum ) {
 995                 $out = Xml::openElement('div', array( 'class' =>  'mw-search-formheader' ) );
 996
 997                 $bareterm = $term;
 998                 if( $this->startsWithImage( $term ) ) {
 999                         // Deletes prefixes
1000                         $bareterm = substr( $term, strpos( $term, ':' ) + 1 );
1001                 }
1002
1003                 $profiles = $this->getSearchProfiles();
1004                 $lang = $this->getLanguage();
1005
1006                 // Outputs XML for Search Types
1007                 $out .= Xml::openElement( 'div', array( 'class' => 'search-types' ) );
1008                 $out .= Xml::openElement( 'ul' );
1009                 foreach ( $profiles as $id => $profile ) {
1010                         if ( !isset( $profile['parameters'] ) ) {
1011                                 $profile['parameters'] = array();
1012                         }
1013                         $profile['parameters']['profile'] = $id;
1014
1015                         $tooltipParam = isset( $profile['namespace-messages'] ) ?
1016                                 $lang->commaList( $profile['namespace-messages'] ) : null;
1017                         $out .= Xml::tags(
1018                                 'li',
1019                                 array(
1020                                         'class' => $this->profile === $id ? 'current' : 'normal'
1021                                 ),
1022                                 $this->makeSearchLink(
1023                                         $bareterm,
1024                                         array(),
1025                                         wfMsg( $profile['message'] ),
1026                                         wfMsg( $profile['tooltip'], $tooltipParam ),
1027                                         $profile['parameters']
1028                                 )
1029                         );
1030                 }
1031                 $out .= Xml::closeElement( 'ul' );
1032                 $out .= Xml::closeElement('div') ;
1033
1034                 // Results-info
1035                 if ( $resultsShown > 0 ) {
1036                         if ( $totalNum > 0 ){
1037                                 $top = wfMsgExt( 'showingresultsheader', array( 'parseinline' ),
1038                                         $lang->formatNum( $this->offset + 1 ),
1039                                         $lang->formatNum( $this->offset + $resultsShown ),
1040                                         $lang->formatNum( $totalNum ),
1041                                         wfEscapeWikiText( $term ),
1042                                         $lang->formatNum( $resultsShown )
1043                                 );
1044                         } elseif ( $resultsShown >= $this->limit ) {
1045                                 $top = wfMsgExt( 'showingresults', array( 'parseinline' ),
1046                                         $lang->formatNum( $this->limit ),
1047                                         $lang->formatNum( $this->offset + 1 )
1048                                 );
1049                         } else {
1050                                 $top =  wfMsgExt( 'showingresultsnum', array( 'parseinline' ),
1051                                         $lang->formatNum( $this->limit ),
1052                                         $lang->formatNum( $this->offset + 1 ),
1053                                         $lang->formatNum( $resultsShown )
1054                                 );
1055                         }
1056                         $out .= Xml::tags( 'div', array( 'class' => 'results-info' ),
1057                                 Xml::tags( 'ul', null, Xml::tags( 'li', null, $top ) )
1058                         );
1059                 }
1060
1061                 $out .= Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1062                 $out .= Xml::closeElement('div');
1063
1064                 return $out;
1065         }
1066
1067         /**
1068          * @param $term string
1069          * @return string
1070          */
1071         protected function shortDialog( $term ) {
1072                 $out = Html::hidden( 'title', $this->getTitle()->getPrefixedText() );
1073                 $out .= Html::hidden( 'profile', $this->profile ) . "\n";
1074                 // Term box
1075                 $out .= Html::input( 'search', $term, 'search', array(
1076                         'id' => $this->profile === 'advanced' ? 'powerSearchText' : 'searchText',
1077                         'size' => '50',
1078                         'autofocus'
1079                 ) ) . "\n";
1080                 $out .= Html::hidden( 'fulltext', 'Search' ) . "\n";
1081                 $out .= Xml::submitButton( wfMsg( 'searchbutton' ) ) . "\n";
1082                 return $out . $this->didYouMeanHtml;
1083         }
1084
1085         /**
1086          * Make a search link with some target namespaces
1087          *
1088          * @param $term String
1089          * @param $namespaces Array ignored
1090          * @param $label String: link's text
1091          * @param $tooltip String: link's tooltip
1092          * @param $params Array: query string parameters
1093          * @return String: HTML fragment
1094          */
1095         protected function makeSearchLink( $term, $namespaces, $label, $tooltip, $params = array() ) {
1096                 $opt = $params;
1097                 foreach( $namespaces as $n ) {
1098                         $opt['ns' . $n] = 1;
1099                 }
1100                 $opt['redirs'] = $this->searchRedirects;
1101
1102                 $stParams = array_merge(
1103                         array(
1104                                 'search' => $term,
1105                                 'fulltext' => wfMsg( 'search' )
1106                         ),
1107                         $opt
1108                 );
1109
1110                 return Xml::element(
1111                         'a',
1112                         array(
1113                                 'href' => $this->getTitle()->getLocalURL( $stParams ),
1114                                 'title' => $tooltip),
1115                         $label
1116                 );
1117         }
1118
1119         /**
1120          * Check if query starts with image: prefix
1121          *
1122          * @param $term String: the string to check
1123          * @return Boolean
1124          */
1125         protected function startsWithImage( $term ) {
1126                 global $wgContLang;
1127
1128                 $p = explode( ':', $term );
1129                 if( count( $p ) > 1 ) {
1130                         return $wgContLang->getNsIndex( $p[0] ) == NS_FILE;
1131                 }
1132                 return false;
1133         }
1134
1135         /**
1136          * Check if query starts with all: prefix
1137          *
1138          * @param $term String: the string to check
1139          * @return Boolean
1140          */
1141         protected function startsWithAll( $term ) {
1142
1143                 $allkeyword = wfMsgForContent('searchall');
1144
1145                 $p = explode( ':', $term );
1146                 if( count( $p ) > 1 ) {
1147                         return $p[0]  == $allkeyword;
1148                 }
1149                 return false;
1150         }
1151
1152         /**
1153          * @since 1.18
1154          *
1155          * @return SearchEngine
1156          */
1157         public function getSearchEngine() {
1158                 if ( $this->searchEngine === null ) {
1159                         $this->searchEngine = SearchEngine::create();
1160                 }
1161                 return $this->searchEngine;
1162         }
1163
1164         /**
1165          * Users of hook SpecialSearchSetupEngine can use this to
1166          * add more params to links to not lose selection when
1167          * user navigates search results.
1168          * @since 1.18
1169          *
1170          * @param $key
1171          * @param $value
1172          */
1173         public function setExtraParam( $key, $value ) {
1174                 $this->extraParams[$key] = $value;
1175         }
1176
1177 }