includes/specials/SpecialSearch.php

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