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, 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          * @var null|string
  38          */
  39         protected $profile;
  40
  41         /** @var SearchEngine Search engine */
  42         protected $searchEngine;
  43
  44         /** @var string Search engine type, if not default */
  45         protected $searchEngineType;
  46
  47         /** @var array For links */
  48         protected $extraParams = array();
  49
  50         /** @var string No idea, apparently used by some other classes */
  51         protected $mPrefix;
  52
  53         /**
  54          * @var int
  55          */
  56         protected $limit, $offset;
  57
  58         /**
  59          * @var array
  60          */
  61         protected $namespaces;
  62
  63         /**
  64          * @var string
  65          */
  66         protected $didYouMeanHtml, $fulltext;
  67
  68         const NAMESPACES_CURRENT = 'sense';
  69
  70         public function __construct() {
  71                 parent::__construct( 'Search' );
  72         }
  73
  74         /**
  75          * Entry point
  76          *
  77          * @param string $par
  78          */
  79         public function execute( $par ) {
  80                 $this->setHeaders();
  81                 $this->outputHeader();
  82                 $out = $this->getOutput();
  83                 $out->allowClickjacking();
  84                 $out->addModuleStyles( array(
  85                         'mediawiki.special', 'mediawiki.special.search', 'mediawiki.ui', 'mediawiki.ui.button'
  86                 ) );
  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                 $this->searchEngineType = $request->getVal( 'srbackend' );
 100
 101                 if ( $request->getVal( 'fulltext' )
 102                         || !is_null( $request->getVal( 'offset' ) )
 103                 ) {
 104                         $this->showResults( $search );
 105                 } else {
 106                         $this->goResult( $search );
 107                 }
 108         }
 109
 110         /**
 111          * Set up basic search parameters from the request and user settings.
 112          *
 113          * @see tests/phpunit/includes/specials/SpecialSearchTest.php
 114          */
 115         public function load() {
 116                 $request = $this->getRequest();
 117                 list( $this->limit, $this->offset ) = $request->getLimitOffset( 20 );
 118                 $this->mPrefix = $request->getVal( 'prefix', '' );
 119
 120                 $user = $this->getUser();
 121
 122                 # Extract manually requested namespaces
 123                 $nslist = $this->powerSearch( $request );
 124                 if ( !count( $nslist ) ) {
 125                         # Fallback to user preference
 126                         $nslist = SearchEngine::userNamespaces( $user );
 127                 }
 128
 129                 $profile = null;
 130                 if ( !count( $nslist ) ) {
 131                         $profile = 'default';
 132                 }
 133
 134                 $profile = $request->getVal( 'profile', $profile );
 135                 $profiles = $this->getSearchProfiles();
 136                 if ( $profile === null ) {
 137                         // BC with old request format
 138                         $profile = 'advanced';
 139                         foreach ( $profiles as $key => $data ) {
 140                                 if ( $nslist === $data['namespaces'] && $key !== 'advanced' ) {
 141                                         $profile = $key;
 142                                 }
 143                         }
 144                         $this->namespaces = $nslist;
 145                 } elseif ( $profile === 'advanced' ) {
 146                         $this->namespaces = $nslist;
 147                 } else {
 148                         if ( isset( $profiles[$profile]['namespaces'] ) ) {
 149                                 $this->namespaces = $profiles[$profile]['namespaces'];
 150                         } else {
 151                                 // Unknown profile requested
 152                                 $profile = 'default';
 153                                 $this->namespaces = $profiles['default']['namespaces'];
 154                         }
 155                 }
 156
 157                 $this->didYouMeanHtml = ''; # html of did you mean... link
 158                 $this->fulltext = $request->getVal( 'fulltext' );
 159                 $this->profile = $profile;
 160         }
 161
 162         /**
 163          * If an exact title match can be found, jump straight ahead to it.
 164          *
 165          * @param string $term
 166          */
 167         public function goResult( $term ) {
 168                 $this->setupPage( $term );
 169                 # Try to go to page as entered.
 170                 $title = Title::newFromText( $term );
 171                 # If the string cannot be used to create a title
 172                 if ( is_null( $title ) ) {
 173                         $this->showResults( $term );
 174
 175                         return;
 176                 }
 177                 # If there's an exact or very near match, jump right there.
 178                 $title = SearchEngine::getNearMatch( $term );
 179
 180                 if ( !is_null( $title ) ) {
 181                         $this->getOutput()->redirect( $title->getFullURL() );
 182
 183                         return;
 184                 }
 185                 # No match, generate an edit URL
 186                 $title = Title::newFromText( $term );
 187                 if ( !is_null( $title ) ) {
 188                         global $wgGoToEdit;
 189                         wfRunHooks( 'SpecialSearchNogomatch', array( &$title ) );
 190                         wfDebugLog( 'nogomatch', $title->getFullText(), 'private' );
 191
 192                         # If the feature is enabled, go straight to the edit page
 193                         if ( $wgGoToEdit ) {
 194                                 $this->getOutput()->redirect( $title->getFullURL( array( 'action' => 'edit' ) ) );
 195
 196                                 return;
 197                         }
 198                 }
 199                 $this->showResults( $term );
 200         }
 201
 202         /**
 203          * @param string $term
 204          */
 205         public function showResults( $term ) {
 206                 global $wgDisableTextSearch, $wgSearchForwardUrl, $wgContLang, $wgScript;
 207
 208                 $profile = new ProfileSection( __METHOD__ );
 209                 $search = $this->getSearchEngine();
 210                 // Request an extra result to determine whether a "next page" link is useful
 211                 $search->setLimitOffset( $this->limit + 1, $this->offset );
 212                 $search->setNamespaces( $this->namespaces );
 213                 $this->saveNamespaces();
 214                 $search->prefix = $this->mPrefix;
 215                 $term = $search->transformSearchTerm( $term );
 216
 217                 wfRunHooks( 'SpecialSearchSetupEngine', array( $this, $this->profile, $search ) );
 218
 219                 $this->setupPage( $term );
 220
 221                 $out = $this->getOutput();
 222
 223                 if ( $wgDisableTextSearch ) {
 224                         if ( $wgSearchForwardUrl ) {
 225                                 $url = str_replace( '$1', urlencode( $term ), $wgSearchForwardUrl );
 226                                 $out->redirect( $url );
 227                         } else {
 228                                 $out->addHTML(
 229                                         Xml::openElement( 'fieldset' ) .
 230                                         Xml::element( 'legend', null, $this->msg( 'search-external' )->text() ) .
 231                                         Xml::element(
 232                                                 'p',
 233                                                 array( 'class' => 'mw-searchdisabled' ),
 234                                                 $this->msg( 'searchdisabled' )->text()
 235                                         ) .
 236                                         $this->msg( 'googlesearch' )->rawParams(
 237                                                 htmlspecialchars( $term ),
 238                                                 'UTF-8',
 239                                                 $this->msg( 'searchbutton' )->escaped()
 240                                         )->text() .
 241                                         Xml::closeElement( 'fieldset' )
 242                                 );
 243                         }
 244
 245                         return;
 246                 }
 247
 248                 $title = Title::newFromText( $term );
 249                 $showSuggestion = $title === null || !$title->isKnown();
 250                 $search->setShowSuggestion( $showSuggestion );
 251
 252                 // fetch search results
 253                 $rewritten = $search->replacePrefixes( $term );
 254
 255                 $titleMatches = $search->searchTitle( $rewritten );
 256                 $textMatches = $search->searchText( $rewritten );
 257
 258                 $textStatus = null;
 259                 if ( $textMatches instanceof Status ) {
 260                         $textStatus = $textMatches;
 261                         $textMatches = null;
 262                 }
 263
 264                 // did you mean... suggestions
 265                 if ( $showSuggestion && $textMatches && !$textStatus && $textMatches->hasSuggestion() ) {
 266                         # mirror Go/Search behavior of original request ..
 267                         $didYouMeanParams = array( 'search' => $textMatches->getSuggestionQuery() );
 268
 269                         if ( $this->fulltext != null ) {
 270                                 $didYouMeanParams['fulltext'] = $this->fulltext;
 271                         }
 272
 273                         $stParams = array_merge(
 274                                 $didYouMeanParams,
 275                                 $this->powerSearchOptions()
 276                         );
 277
 278                         $suggestionSnippet = $textMatches->getSuggestionSnippet();
 279
 280                         if ( $suggestionSnippet == '' ) {
 281                                 $suggestionSnippet = null;
 282                         }
 283
 284                         $suggestLink = Linker::linkKnown(
 285                                 $this->getPageTitle(),
 286                                 $suggestionSnippet,
 287                                 array(),
 288                                 $stParams
 289                         );
 290
 291                         $this->didYouMeanHtml = '<div class="searchdidyoumean">'
 292                                 . $this->msg( 'search-suggest' )->rawParams( $suggestLink )->text() . '</div>';
 293                 }
 294
 295                 if ( !wfRunHooks( 'SpecialSearchResultsPrepend', array( $this, $out, $term ) ) ) {
 296                         # Hook requested termination
 297                         return;
 298                 }
 299
 300                 // start rendering the page
 301                 $out->addHtml(
 302                         Xml::openElement(
 303                                 'form',
 304                                 array(
 305                                         'id' => ( $this->profile === 'advanced' ? 'powersearch' : 'search' ),
 306                                         'method' => 'get',
 307                                         'action' => $wgScript
 308                                 )
 309                         )
 310                 );
 311                 $out->addHtml(
 312                         # This is an awful awful ID name. It's not a table, but we
 313                         # named it poorly from when this was a table so now we're
 314                         # stuck with it
 315                         Xml::openElement( 'div', array( 'id' => 'mw-search-top-table' ) ) .
 316                         $this->shortDialog( $term ) .
 317                         Xml::closeElement( 'div' )
 318                 );
 319
 320                 $filePrefix = $wgContLang->getFormattedNsText( NS_FILE ) . ':';
 321                 if ( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
 322                         $out->addHTML( $this->formHeader( $term, 0, 0 ) );
 323                         $out->addHtml( $this->getProfileForm( $this->profile, $term ) );
 324                         $out->addHTML( '</form>' );
 325
 326                         // Empty query -- straight view of search form
 327                         return;
 328                 }
 329
 330                 // Get number of results
 331                 $titleMatchesNum = $titleMatches ? $titleMatches->numRows() : 0;
 332                 $textMatchesNum = $textMatches ? $textMatches->numRows() : 0;
 333                 // Total initial query matches (possible false positives)
 334                 $num = $titleMatchesNum + $textMatchesNum;
 335
 336                 // Get total actual results (after second filtering, if any)
 337                 $numTitleMatches = $titleMatches && !is_null( $titleMatches->getTotalHits() ) ?
 338                         $titleMatches->getTotalHits() : $titleMatchesNum;
 339                 $numTextMatches = $textMatches && !is_null( $textMatches->getTotalHits() ) ?
 340                         $textMatches->getTotalHits() : $textMatchesNum;
 341
 342                 // get total number of results if backend can calculate it
 343                 $totalRes = 0;
 344                 if ( $titleMatches && !is_null( $titleMatches->getTotalHits() ) ) {
 345                         $totalRes += $titleMatches->getTotalHits();
 346                 }
 347                 if ( $textMatches && !is_null( $textMatches->getTotalHits() ) ) {
 348                         $totalRes += $textMatches->getTotalHits();
 349                 }
 350
 351                 // show number of results and current offset
 352                 $out->addHTML( $this->formHeader( $term, $num, $totalRes ) );
 353                 $out->addHtml( $this->getProfileForm( $this->profile, $term ) );
 354
 355                 $out->addHtml( Xml::closeElement( 'form' ) );
 356                 $out->addHtml( "<div class='searchresults'>" );
 357
 358                 // prev/next links
 359                 $prevnext = null;
 360                 if ( $num || $this->offset ) {
 361                         // Show the create link ahead
 362                         $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 363                         if ( $totalRes > $this->limit || $this->offset ) {
 364                                 $prevnext = $this->getLanguage()->viewPrevNext(
 365                                         $this->getPageTitle(),
 366                                         $this->offset,
 367                                         $this->limit,
 368                                         $this->powerSearchOptions() + array( 'search' => $term ),
 369                                         max( $titleMatchesNum, $textMatchesNum ) <= $this->limit
 370                                 );
 371                         }
 372                         wfRunHooks( 'SpecialSearchResults', array( $term, &$titleMatches, &$textMatches ) );
 373                 } else {
 374                         wfRunHooks( 'SpecialSearchNoResults', array( $term ) );
 375                 }
 376
 377                 $out->parserOptions()->setEditSection( false );
 378                 if ( $titleMatches ) {
 379                         if ( $numTitleMatches > 0 ) {
 380                                 $out->wrapWikiMsg( "==$1==\n", 'titlematches' );
 381                                 $out->addHTML( $this->showMatches( $titleMatches ) );
 382                         }
 383                         $titleMatches->free();
 384                 }
 385                 if ( $textMatches && !$textStatus ) {
 386                         // output appropriate heading
 387                         if ( $numTextMatches > 0 && $numTitleMatches > 0 ) {
 388                                 // if no title matches the heading is redundant
 389                                 $out->wrapWikiMsg( "==$1==\n", 'textmatches' );
 390                         }
 391
 392                         // show interwiki results if any
 393                         if ( $textMatches->hasInterwikiResults() ) {
 394                                 $out->addHTML( $this->showInterwiki( $textMatches->getInterwikiResults(), $term ) );
 395                         }
 396                         // show results
 397                         if ( $numTextMatches > 0 ) {
 398                                 $out->addHTML( $this->showMatches( $textMatches ) );
 399                         }
 400
 401                         $textMatches->free();
 402                 }
 403                 if ( $num === 0 ) {
 404                         if ( $textStatus ) {
 405                                 $out->addHTML( '<div class="error">' .
 406                                         $textStatus->getMessage( 'search-error' ) . '</div>' );
 407                         } else {
 408                                 $out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>",
 409                                         array( 'search-nonefound', wfEscapeWikiText( $term ) ) );
 410                                 $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 411                         }
 412                 }
 413                 $out->addHtml( "</div>" );
 414
 415                 if ( $prevnext ) {
 416                         $out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
 417                 }
 418         }
 419
 420         /**
 421          * @param Title $title
 422          * @param int $num The number of search results found
 423          * @param null|SearchResultSet $titleMatches Results from title search
 424          * @param null|SearchResultSet $textMatches  Results from text search
 425          */
 426         protected function showCreateLink( $title, $num, $titleMatches, $textMatches ) {
 427                 // show direct page/create link if applicable
 428
 429                 // Check DBkey !== '' in case of fragment link only.
 430                 if ( is_null( $title ) || $title->getDBkey() === ''
 431                         || ( $titleMatches !== null && $titleMatches->searchContainedSyntax() )
 432                         || ( $textMatches !== null && $textMatches->searchContainedSyntax() )
 433                 ) {
 434                         // invalid title
 435                         // preserve the paragraph for margins etc...
 436                         $this->getOutput()->addHtml( '<p></p>' );
 437
 438                         return;
 439                 }
 440
 441                 if ( $title->isKnown() ) {
 442                         $messageName = 'searchmenu-exists';
 443                 } elseif ( $title->userCan( 'create', $this->getUser() ) ) {
 444                         $messageName = 'searchmenu-new';
 445                 } else {
 446                         $messageName = 'searchmenu-new-nocreate';
 447                 }
 448                 $params = array(
 449                         $messageName,
 450                         wfEscapeWikiText( $title->getPrefixedText() ),
 451                         Message::numParam( $num )
 452                 );
 453                 wfRunHooks( 'SpecialSearchCreateLink', array( $title, &$params ) );
 454
 455                 // Extensions using the hook might still return an empty $messageName
 456                 if ( $messageName ) {
 457                         $this->getOutput()->wrapWikiMsg( "<p class=\"mw-search-createlink\">\n$1</p>", $params );
 458                 } else {
 459                         // preserve the paragraph for margins etc...
 460                         $this->getOutput()->addHtml( '<p></p>' );
 461                 }
 462         }
 463
 464         /**
 465          * @param string $term
 466          */
 467         protected function setupPage( $term ) {
 468                 # Should advanced UI be used?
 469                 $this->searchAdvanced = ( $this->profile === 'advanced' );
 470                 $out = $this->getOutput();
 471                 if ( strval( $term ) !== '' ) {
 472                         $out->setPageTitle( $this->msg( 'searchresults' ) );
 473                         $out->setHTMLTitle( $this->msg( 'pagetitle' )
 474                                 ->rawParams( $this->msg( 'searchresults-title' )->rawParams( $term )->text() )
 475                                 ->inContentLanguage()->text()
 476                         );
 477                 }
 478                 // add javascript specific to special:search
 479                 $out->addModules( 'mediawiki.special.search' );
 480         }
 481
 482         /**
 483          * Extract "power search" namespace settings from the request object,
 484          * returning a list of index numbers to search.
 485          *
 486          * @param WebRequest $request
 487          * @return array
 488          */
 489         protected function powerSearch( &$request ) {
 490                 $arr = array();
 491                 foreach ( SearchEngine::searchableNamespaces() as $ns => $name ) {
 492                         if ( $request->getCheck( 'ns' . $ns ) ) {
 493                                 $arr[] = $ns;
 494                         }
 495                 }
 496
 497                 return $arr;
 498         }
 499
 500         /**
 501          * Reconstruct the 'power search' options for links
 502          *
 503          * @return array
 504          */
 505         protected function powerSearchOptions() {
 506                 $opt = array();
 507                 if ( $this->profile !== 'advanced' ) {
 508                         $opt['profile'] = $this->profile;
 509                 } else {
 510                         foreach ( $this->namespaces as $n ) {
 511                                 $opt['ns' . $n] = 1;
 512                         }
 513                 }
 514
 515                 return $opt + $this->extraParams;
 516         }
 517
 518         /**
 519          * Save namespace preferences when we're supposed to
 520          *
 521          * @return bool Whether we wrote something
 522          */
 523         protected function saveNamespaces() {
 524                 $user = $this->getUser();
 525                 $request = $this->getRequest();
 526
 527                 if ( $user->isLoggedIn() &&
 528                         !is_null( $request->getVal( 'nsRemember' ) ) &&
 529                         $user->matchEditToken(
 530                                 $request->getVal( 'nsToken' ),
 531                                 'searchnamespace',
 532                                 $request
 533                         )
 534                 ) {
 535                         // Reset namespace preferences: namespaces are not searched
 536                         // when they're not mentioned in the URL parameters.
 537                         foreach ( MWNamespace::getValidNamespaces() as $n ) {
 538                                 $user->setOption( 'searchNs' . $n, false );
 539                         }
 540                         // The request parameters include all the namespaces we just searched.
 541                         // Even if they're the same as an existing profile, they're not eaten.
 542                         foreach ( $this->namespaces as $n ) {
 543                                 $user->setOption( 'searchNs' . $n, true );
 544                         }
 545
 546                         $user->saveSettings();
 547                         return true;
 548                 }
 549
 550                 return false;
 551         }
 552
 553         /**
 554          * Show whole set of results
 555          *
 556          * @param SearchResultSet $matches
 557          *
 558          * @return string
 559          */
 560         protected function showMatches( &$matches ) {
 561                 global $wgContLang;
 562
 563                 $profile = new ProfileSection( __METHOD__ );
 564                 $terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
 565
 566                 $out = "<ul class='mw-search-results'>\n";
 567                 $result = $matches->next();
 568                 $count = 0;
 569                 while ( $result && $count < $this->limit ) {
 570                         $out .= $this->showHit( $result, $terms );
 571                         $result = $matches->next();
 572                         $count++;
 573                 }
 574                 $out .= "</ul>\n";
 575
 576                 // convert the whole thing to desired language variant
 577                 $out = $wgContLang->convert( $out );
 578
 579                 return $out;
 580         }
 581
 582         /**
 583          * Format a single hit result
 584          *
 585          * @param SearchResult $result
 586          * @param array $terms Terms to highlight
 587          *
 588          * @return string
 589          */
 590         protected function showHit( $result, $terms ) {
 591                 $profile = new ProfileSection( __METHOD__ );
 592
 593                 if ( $result->isBrokenTitle() ) {
 594                         return '';
 595                 }
 596
 597                 $title = $result->getTitle();
 598
 599                 $titleSnippet = $result->getTitleSnippet( $terms );
 600
 601                 if ( $titleSnippet == '' ) {
 602                         $titleSnippet = null;
 603                 }
 604
 605                 $link_t = clone $title;
 606
 607                 wfRunHooks( 'ShowSearchHitTitle',
 608                         array( &$link_t, &$titleSnippet, $result, $terms, $this ) );
 609
 610                 $link = Linker::linkKnown(
 611                         $link_t,
 612                         $titleSnippet
 613                 );
 614
 615                 //If page content is not readable, just return the title.
 616                 //This is not quite safe, but better than showing excerpts from non-readable pages
 617                 //Note that hiding the entry entirely would screw up paging.
 618                 if ( !$title->userCan( 'read', $this->getUser() ) ) {
 619                         return "<li>{$link}</li>\n";
 620                 }
 621
 622                 // If the page doesn't *exist*... our search index is out of date.
 623                 // The least confusing at this point is to drop the result.
 624                 // You may get less results, but... oh well. :P
 625                 if ( $result->isMissingRevision() ) {
 626                         return '';
 627                 }
 628
 629                 // format redirects / relevant sections
 630                 $redirectTitle = $result->getRedirectTitle();
 631                 $redirectText = $result->getRedirectSnippet( $terms );
 632                 $sectionTitle = $result->getSectionTitle();
 633                 $sectionText = $result->getSectionSnippet( $terms );
 634                 $redirect = '';
 635
 636                 if ( !is_null( $redirectTitle ) ) {
 637                         if ( $redirectText == '' ) {
 638                                 $redirectText = null;
 639                         }
 640
 641                         $redirect = "<span class='searchalttitle'>" .
 642                                 $this->msg( 'search-redirect' )->rawParams(
 643                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 644                                 "</span>";
 645                 }
 646
 647                 $section = '';
 648
 649                 if ( !is_null( $sectionTitle ) ) {
 650                         if ( $sectionText == '' ) {
 651                                 $sectionText = null;
 652                         }
 653
 654                         $section = "<span class='searchalttitle'>" .
 655                                 $this->msg( 'search-section' )->rawParams(
 656                                         Linker::linkKnown( $sectionTitle, $sectionText ) )->text() .
 657                                 "</span>";
 658                 }
 659
 660                 // format text extract
 661                 $extract = "<div class='searchresult'>" . $result->getTextSnippet( $terms ) . "</div>";
 662
 663                 $lang = $this->getLanguage();
 664
 665                 // format score
 666                 if ( is_null( $result->getScore() ) ) {
 667                         // Search engine doesn't report scoring info
 668                         $score = '';
 669                 } else {
 670                         $percent = sprintf( '%2.1f', $result->getScore() * 100 );
 671                         $score = $this->msg( 'search-result-score' )->numParams( $percent )->text()
 672                                 . ' - ';
 673                 }
 674
 675                 // format description
 676                 $byteSize = $result->getByteSize();
 677                 $wordCount = $result->getWordCount();
 678                 $timestamp = $result->getTimestamp();
 679                 $size = $this->msg( 'search-result-size', $lang->formatSize( $byteSize ) )
 680                         ->numParams( $wordCount )->escaped();
 681
 682                 if ( $title->getNamespace() == NS_CATEGORY ) {
 683                         $cat = Category::newFromTitle( $title );
 684                         $size = $this->msg( 'search-result-category-size' )
 685                                 ->numParams( $cat->getPageCount(), $cat->getSubcatCount(), $cat->getFileCount() )
 686                                 ->escaped();
 687                 }
 688
 689                 $date = $lang->userTimeAndDate( $timestamp, $this->getUser() );
 690
 691                 // link to related articles if supported
 692                 $related = '';
 693                 if ( $result->hasRelated() ) {
 694                         $stParams = array_merge(
 695                                 $this->powerSearchOptions(),
 696                                 array(
 697                                         'search' => $this->msg( 'searchrelated' )->inContentLanguage()->text() .
 698                                                 ':' . $title->getPrefixedText(),
 699                                         'fulltext' => $this->msg( 'search' )->text()
 700                                 )
 701                         );
 702
 703                         $related = ' -- ' . Linker::linkKnown(
 704                                 $this->getPageTitle(),
 705                                 $this->msg( 'search-relatedarticle' )->text(),
 706                                 array(),
 707                                 $stParams
 708                         );
 709                 }
 710
 711                 $fileMatch = '';
 712                 // Include a thumbnail for media files...
 713                 if ( $title->getNamespace() == NS_FILE ) {
 714                         $img = $result->getFile();
 715                         $img = $img ?: wfFindFile( $title );
 716                         if ( $result->isFileMatch() ) {
 717                                 $fileMatch = "<span class='searchalttitle'>" .
 718                                         $this->msg( 'search-file-match' )->escaped() . "</span>";
 719                         }
 720                         if ( $img ) {
 721                                 $thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
 722                                 if ( $thumb ) {
 723                                         $desc = $this->msg( 'parentheses' )->rawParams( $img->getShortDesc() )->escaped();
 724                                         // Float doesn't seem to interact well with the bullets.
 725                                         // Table messes up vertical alignment of the bullets.
 726                                         // Bullets are therefore disabled (didn't look great anyway).
 727                                         return "<li>" .
 728                                                 '<table class="searchResultImage">' .
 729                                                 '<tr>' .
 730                                                 '<td style="width: 120px; text-align: center; vertical-align: top;">' .
 731                                                 $thumb->toHtml( array( 'desc-link' => true ) ) .
 732                                                 '</td>' .
 733                                                 '<td style="vertical-align: top;">' .
 734                                                 "{$link} {$fileMatch}" .
 735                                                 $extract .
 736                                                 "<div class='mw-search-result-data'>{$score}{$desc} - {$date}{$related}</div>" .
 737                                                 '</td>' .
 738                                                 '</tr>' .
 739                                                 '</table>' .
 740                                                 "</li>\n";
 741                                 }
 742                         }
 743                 }
 744
 745                 $html = null;
 746
 747                 if ( wfRunHooks( 'ShowSearchHit', array(
 748                         $this, $result, $terms,
 749                         &$link, &$redirect, &$section, &$extract,
 750                         &$score, &$size, &$date, &$related,
 751                         &$html
 752                 ) ) ) {
 753                         $html = "<li><div class='mw-search-result-heading'>" .
 754                                 "{$link} {$redirect} {$section} {$fileMatch}</div> {$extract}\n" .
 755                                 "<div class='mw-search-result-data'>{$score}{$size} - {$date}{$related}</div>" .
 756                                 "</li>\n";
 757                 }
 758
 759                 return $html;
 760         }
 761
 762         /**
 763          * Show results from other wikis
 764          *
 765          * @param SearchResultSet|array $matches
 766          * @param string $query
 767          *
 768          * @return string
 769          */
 770         protected function showInterwiki( $matches, $query ) {
 771                 global $wgContLang;
 772                 $profile = new ProfileSection( __METHOD__ );
 773
 774                 $out = "<div id='mw-search-interwiki'><div id='mw-search-interwiki-caption'>" .
 775                         $this->msg( 'search-interwiki-caption' )->text() . "</div>\n";
 776                 $out .= "<ul class='mw-search-iwresults'>\n";
 777
 778                 // work out custom project captions
 779                 $customCaptions = array();
 780                 // format per line <iwprefix>:<caption>
 781                 $customLines = explode( "\n", $this->msg( 'search-interwiki-custom' )->text() );
 782                 foreach ( $customLines as $line ) {
 783                         $parts = explode( ":", $line, 2 );
 784                         if ( count( $parts ) == 2 ) { // validate line
 785                                 $customCaptions[$parts[0]] = $parts[1];
 786                         }
 787                 }
 788
 789                 if ( !is_array( $matches ) ) {
 790                         $matches = array( $matches );
 791                 }
 792
 793                 foreach ( $matches as $set ) {
 794                         $prev = null;
 795                         $result = $set->next();
 796                         while ( $result ) {
 797                                 $out .= $this->showInterwikiHit( $result, $prev, $query, $customCaptions );
 798                                 $prev = $result->getInterwikiPrefix();
 799                                 $result = $set->next();
 800                         }
 801                 }
 802
 803                 // @todo Should support paging in a non-confusing way (not sure how though, maybe via ajax)..
 804                 $out .= "</ul></div>\n";
 805
 806                 // convert the whole thing to desired language variant
 807                 $out = $wgContLang->convert( $out );
 808
 809                 return $out;
 810         }
 811
 812         /**
 813          * Show single interwiki link
 814          *
 815          * @param SearchResult $result
 816          * @param string $lastInterwiki
 817          * @param string $query
 818          * @param array $customCaptions iw prefix -> caption
 819          *
 820          * @return string
 821          */
 822         protected function showInterwikiHit( $result, $lastInterwiki, $query, $customCaptions ) {
 823                 $profile = new ProfileSection( __METHOD__ );
 824
 825                 if ( $result->isBrokenTitle() ) {
 826                         return '';
 827                 }
 828
 829                 $title = $result->getTitle();
 830
 831                 $titleSnippet = $result->getTitleSnippet();
 832
 833                 if ( $titleSnippet == '' ) {
 834                         $titleSnippet = null;
 835                 }
 836
 837                 $link = Linker::linkKnown(
 838                         $title,
 839                         $titleSnippet
 840                 );
 841
 842                 // format redirect if any
 843                 $redirectTitle = $result->getRedirectTitle();
 844                 $redirectText = $result->getRedirectSnippet();
 845                 $redirect = '';
 846                 if ( !is_null( $redirectTitle ) ) {
 847                         if ( $redirectText == '' ) {
 848                                 $redirectText = null;
 849                         }
 850
 851                         $redirect = "<span class='searchalttitle'>" .
 852                                 $this->msg( 'search-redirect' )->rawParams(
 853                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 854                                 "</span>";
 855                 }
 856
 857                 $out = "";
 858                 // display project name
 859                 if ( is_null( $lastInterwiki ) || $lastInterwiki != $title->getInterwiki() ) {
 860                         if ( array_key_exists( $title->getInterwiki(), $customCaptions ) ) {
 861                                 // captions from 'search-interwiki-custom'
 862                                 $caption = $customCaptions[$title->getInterwiki()];
 863                         } else {
 864                                 // default is to show the hostname of the other wiki which might suck
 865                                 // if there are many wikis on one hostname
 866                                 $parsed = wfParseUrl( $title->getFullURL() );
 867                                 $caption = $this->msg( 'search-interwiki-default', $parsed['host'] )->text();
 868                         }
 869                         // "more results" link (special page stuff could be localized, but we might not know target lang)
 870                         $searchTitle = Title::newFromText( $title->getInterwiki() . ":Special:Search" );
 871                         $searchLink = Linker::linkKnown(
 872                                 $searchTitle,
 873                                 $this->msg( 'search-interwiki-more' )->text(),
 874                                 array(),
 875                                 array(
 876                                         'search' => $query,
 877                                         'fulltext' => 'Search'
 878                                 )
 879                         );
 880                         $out .= "</ul><div class='mw-search-interwiki-project'><span class='mw-search-interwiki-more'>
 881                                 {$searchLink}</span>{$caption}</div>\n<ul>";
 882                 }
 883
 884                 $out .= "<li>{$link} {$redirect}</li>\n";
 885
 886                 return $out;
 887         }
 888
 889         /**
 890          * @param string $profile
 891          * @param string $term
 892          * @return string
 893          */
 894         protected function getProfileForm( $profile, $term ) {
 895                 // Hidden stuff
 896                 $opts = array();
 897                 $opts['profile'] = $this->profile;
 898
 899                 if ( $profile === 'advanced' ) {
 900                         return $this->powerSearchBox( $term, $opts );
 901                 } else {
 902                         $form = '';
 903                         wfRunHooks( 'SpecialSearchProfileForm', array( $this, &$form, $profile, $term, $opts ) );
 904
 905                         return $form;
 906                 }
 907         }
 908
 909         /**
 910          * Generates the power search box at [[Special:Search]]
 911          *
 912          * @param string $term Search term
 913          * @param array $opts
 914          * @return string HTML form
 915          */
 916         protected function powerSearchBox( $term, $opts ) {
 917                 global $wgContLang;
 918
 919                 // Groups namespaces into rows according to subject
 920                 $rows = array();
 921                 foreach ( SearchEngine::searchableNamespaces() as $namespace => $name ) {
 922                         $subject = MWNamespace::getSubject( $namespace );
 923                         if ( !array_key_exists( $subject, $rows ) ) {
 924                                 $rows[$subject] = "";
 925                         }
 926
 927                         $name = $wgContLang->getConverter()->convertNamespace( $namespace );
 928                         if ( $name == '' ) {
 929                                 $name = $this->msg( 'blanknamespace' )->text();
 930                         }
 931
 932                         $rows[$subject] .=
 933                                 Xml::openElement(
 934                                         'td', array( 'style' => 'white-space: nowrap' )
 935                                 ) .
 936                                 Xml::checkLabel(
 937                                         $name,
 938                                         "ns{$namespace}",
 939                                         "mw-search-ns{$namespace}",
 940                                         in_array( $namespace, $this->namespaces )
 941                                 ) .
 942                                 Xml::closeElement( 'td' );
 943                 }
 944
 945                 $rows = array_values( $rows );
 946                 $numRows = count( $rows );
 947
 948                 // Lays out namespaces in multiple floating two-column tables so they'll
 949                 // be arranged nicely while still accommodating different screen widths
 950                 $namespaceTables = '';
 951                 for ( $i = 0; $i < $numRows; $i += 4 ) {
 952                         $namespaceTables .= Xml::openElement(
 953                                 'table',
 954                                 array( 'cellpadding' => 0, 'cellspacing' => 0 )
 955                         );
 956
 957                         for ( $j = $i; $j < $i + 4 && $j < $numRows; $j++ ) {
 958                                 $namespaceTables .= Xml::tags( 'tr', null, $rows[$j] );
 959                         }
 960
 961                         $namespaceTables .= Xml::closeElement( 'table' );
 962                 }
 963
 964                 $showSections = array( 'namespaceTables' => $namespaceTables );
 965
 966                 wfRunHooks( 'SpecialSearchPowerBox', array( &$showSections, $term, $opts ) );
 967
 968                 $hidden = '';
 969                 foreach ( $opts as $key => $value ) {
 970                         $hidden .= Html::hidden( $key, $value );
 971                 }
 972
 973                 # Stuff to feed saveNamespaces()
 974                 $remember = '';
 975                 $user = $this->getUser();
 976                 if ( $user->isLoggedIn() ) {
 977                         $remember .= Html::hidden(
 978                                 'nsToken',
 979                                 $user->getEditToken(
 980                                         'searchnamespace',
 981                                         $this->getRequest()
 982                                 )
 983                         ) .
 984                         Xml::checkLabel(
 985                                 wfMessage( 'powersearch-remember' )->text(),
 986                                 'nsRemember',
 987                                 'mw-search-powersearch-remember',
 988                                 false
 989                         );
 990                 }
 991
 992                 // Return final output
 993                 return Xml::openElement(
 994                         'fieldset',
 995                         array( 'id' => 'mw-searchoptions', 'style' => 'margin:0em;' )
 996                 ) .
 997                         Xml::element( 'legend', null, $this->msg( 'powersearch-legend' )->text() ) .
 998                         Xml::tags( 'h4', null, $this->msg( 'powersearch-ns' )->parse() ) .
 999                         Html::element( 'div', array( 'id' => 'mw-search-togglebox' ) ) .
1000                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
1001                         implode( Xml::element( 'div', array( 'class' => 'divider' ), '', false ), $showSections ) .
1002                         $hidden .
1003                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
1004                         $remember .
1005                         Xml::closeElement( 'fieldset' );
1006         }
1007
1008         /**
1009          * @return array
1010          */
1011         protected function getSearchProfiles() {
1012                 // Builds list of Search Types (profiles)
1013                 $nsAllSet = array_keys( SearchEngine::searchableNamespaces() );
1014
1015                 $profiles = array(
1016                         'default' => array(
1017                                 'message' => 'searchprofile-articles',
1018                                 'tooltip' => 'searchprofile-articles-tooltip',
1019                                 'namespaces' => SearchEngine::defaultNamespaces(),
1020                                 'namespace-messages' => SearchEngine::namespacesAsText(
1021                                         SearchEngine::defaultNamespaces()
1022                                 ),
1023                         ),
1024                         'images' => array(
1025                                 'message' => 'searchprofile-images',
1026                                 'tooltip' => 'searchprofile-images-tooltip',
1027                                 'namespaces' => array( NS_FILE ),
1028                         ),
1029                         'all' => array(
1030                                 'message' => 'searchprofile-everything',
1031                                 'tooltip' => 'searchprofile-everything-tooltip',
1032                                 'namespaces' => $nsAllSet,
1033                         ),
1034                         'advanced' => array(
1035                                 'message' => 'searchprofile-advanced',
1036                                 'tooltip' => 'searchprofile-advanced-tooltip',
1037                                 'namespaces' => self::NAMESPACES_CURRENT,
1038                         )
1039                 );
1040
1041                 wfRunHooks( 'SpecialSearchProfiles', array( &$profiles ) );
1042
1043                 foreach ( $profiles as &$data ) {
1044                         if ( !is_array( $data['namespaces'] ) ) {
1045                                 continue;
1046                         }
1047                         sort( $data['namespaces'] );
1048                 }
1049
1050                 return $profiles;
1051         }
1052
1053         /**
1054          * @param string $term
1055          * @param int $resultsShown
1056          * @param int $totalNum
1057          * @return string
1058          */
1059         protected function formHeader( $term, $resultsShown, $totalNum ) {
1060                 $out = Xml::openElement( 'div', array( 'class' => 'mw-search-formheader' ) );
1061
1062                 $bareterm = $term;
1063                 if ( $this->startsWithImage( $term ) ) {
1064                         // Deletes prefixes
1065                         $bareterm = substr( $term, strpos( $term, ':' ) + 1 );
1066                 }
1067
1068                 $profiles = $this->getSearchProfiles();
1069                 $lang = $this->getLanguage();
1070
1071                 // Outputs XML for Search Types
1072                 $out .= Xml::openElement( 'div', array( 'class' => 'search-types' ) );
1073                 $out .= Xml::openElement( 'ul' );
1074                 foreach ( $profiles as $id => $profile ) {
1075                         if ( !isset( $profile['parameters'] ) ) {
1076                                 $profile['parameters'] = array();
1077                         }
1078                         $profile['parameters']['profile'] = $id;
1079
1080                         $tooltipParam = isset( $profile['namespace-messages'] ) ?
1081                                 $lang->commaList( $profile['namespace-messages'] ) : null;
1082                         $out .= Xml::tags(
1083                                 'li',
1084                                 array(
1085                                         'class' => $this->profile === $id ? 'current' : 'normal'
1086                                 ),
1087                                 $this->makeSearchLink(
1088                                         $bareterm,
1089                                         array(),
1090                                         $this->msg( $profile['message'] )->text(),
1091                                         $this->msg( $profile['tooltip'], $tooltipParam )->text(),
1092                                         $profile['parameters']
1093                                 )
1094                         );
1095                 }
1096                 $out .= Xml::closeElement( 'ul' );
1097                 $out .= Xml::closeElement( 'div' );
1098
1099                 // Results-info
1100                 if ( $resultsShown > 0 ) {
1101                         if ( $totalNum > 0 ) {
1102                                 $top = $this->msg( 'showingresultsheader' )
1103                                         ->numParams( $this->offset + 1, $this->offset + $resultsShown, $totalNum )
1104                                         ->params( wfEscapeWikiText( $term ) )
1105                                         ->numParams( $resultsShown )
1106                                         ->parse();
1107                         } elseif ( $resultsShown >= $this->limit ) {
1108                                 $top = $this->msg( 'showingresults' )
1109                                         ->numParams( $this->limit, $this->offset + 1 )
1110                                         ->parse();
1111                         } else {
1112                                 $top = $this->msg( 'showingresultsnum' )
1113                                         ->numParams( $this->limit, $this->offset + 1, $resultsShown )
1114                                         ->parse();
1115                         }
1116                         $out .= Xml::tags( 'div', array( 'class' => 'results-info' ),
1117                                 Xml::tags( 'ul', null, Xml::tags( 'li', null, $top ) )
1118                         );
1119                 }
1120
1121                 $out .= Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1122                 $out .= Xml::closeElement( 'div' );
1123
1124                 return $out;
1125         }
1126
1127         /**
1128          * @param string $term
1129          * @return string
1130          */
1131         protected function shortDialog( $term ) {
1132                 $out = Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() );
1133                 $out .= Html::hidden( 'profile', $this->profile ) . "\n";
1134                 // Term box
1135                 $out .= Html::input( 'search', $term, 'search', array(
1136                         'id' => $this->profile === 'advanced' ? 'powerSearchText' : 'searchText',
1137                         'size' => '50',
1138                         'autofocus',
1139                         'class' => 'mw-ui-input',
1140                 ) ) . "\n";
1141                 $out .= Html::hidden( 'fulltext', 'Search' ) . "\n";
1142                 $out .= Xml::submitButton(
1143                         $this->msg( 'searchbutton' )->text(),
1144                         array( 'class' => array( 'mw-ui-button', 'mw-ui-progressive' ) )
1145                 ) . "\n";
1146
1147                 return $out . $this->didYouMeanHtml;
1148         }
1149
1150         /**
1151          * Make a search link with some target namespaces
1152          *
1153          * @param string $term
1154          * @param array $namespaces Ignored
1155          * @param string $label Link's text
1156          * @param string $tooltip Link's tooltip
1157          * @param array $params Query string parameters
1158          * @return string HTML fragment
1159          */
1160         protected function makeSearchLink( $term, $namespaces, $label, $tooltip, $params = array() ) {
1161                 $opt = $params;
1162                 foreach ( $namespaces as $n ) {
1163                         $opt['ns' . $n] = 1;
1164                 }
1165
1166                 $stParams = array_merge(
1167                         array(
1168                                 'search' => $term,
1169                                 'fulltext' => $this->msg( 'search' )->text()
1170                         ),
1171                         $opt
1172                 );
1173
1174                 return Xml::element(
1175                         'a',
1176                         array(
1177                                 'href' => $this->getPageTitle()->getLocalURL( $stParams ),
1178                                 'title' => $tooltip
1179                         ),
1180                         $label
1181                 );
1182         }
1183
1184         /**
1185          * Check if query starts with image: prefix
1186          *
1187          * @param string $term The string to check
1188          * @return bool
1189          */
1190         protected function startsWithImage( $term ) {
1191                 global $wgContLang;
1192
1193                 $parts = explode( ':', $term );
1194                 if ( count( $parts ) > 1 ) {
1195                         return $wgContLang->getNsIndex( $parts[0] ) == NS_FILE;
1196                 }
1197
1198                 return false;
1199         }
1200
1201         /**
1202          * Check if query starts with all: prefix
1203          *
1204          * @param string $term The string to check
1205          * @return bool
1206          */
1207         protected function startsWithAll( $term ) {
1208
1209                 $allkeyword = $this->msg( 'searchall' )->inContentLanguage()->text();
1210
1211                 $parts = explode( ':', $term );
1212                 if ( count( $parts ) > 1 ) {
1213                         return $parts[0] == $allkeyword;
1214                 }
1215
1216                 return false;
1217         }
1218
1219         /**
1220          * @since 1.18
1221          *
1222          * @return SearchEngine
1223          */
1224         public function getSearchEngine() {
1225                 if ( $this->searchEngine === null ) {
1226                         $this->searchEngine = $this->searchEngineType ?
1227                                 SearchEngine::create( $this->searchEngineType ) : SearchEngine::create();
1228                 }
1229
1230                 return $this->searchEngine;
1231         }
1232
1233         /**
1234          * Current search profile.
1235          * @return null|string
1236          */
1237         function getProfile() {
1238                 return $this->profile;
1239         }
1240
1241         /**
1242          * Current namespaces.
1243          * @return array
1244          */
1245         function getNamespaces() {
1246                 return $this->namespaces;
1247         }
1248
1249         /**
1250          * Users of hook SpecialSearchSetupEngine can use this to
1251          * add more params to links to not lose selection when
1252          * user navigates search results.
1253          * @since 1.18
1254          *
1255          * @param string $key
1256          * @param mixed $value
1257          */
1258         public function setExtraParam( $key, $value ) {
1259                 $this->extraParams[$key] = $value;
1260         }
1261
1262         protected function getGroupName() {
1263                 return 'pages';
1264         }
1265 }