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