includes/ImagePage.php

   1 <?php
   2 /**
   3  * Class for viewing MediaWiki file description pages
   4  *
   5  * @ingroup Media
   6  */
   7 class ImagePage extends Article {
   8
   9         /**
  10          * @var File
  11          */
  12         private $displayImg;
  13         /**
  14          * @var FileRepo
  15          */
  16         private $repo;
  17         private $fileLoaded;
  18
  19         var $mExtraDescription = false;
  20
  21         protected function newPage( Title $title ) {
  22                 // Overload mPage with a file-specific page
  23                 return new WikiFilePage( $title );
  24         }
  25
  26         /**
  27          * Constructor from a page id
  28          * @param $id Int article ID to load
  29          */
  30         public static function newFromID( $id ) {
  31                 $t = Title::newFromID( $id );
  32                 # @todo FIXME: Doesn't inherit right
  33                 return $t == null ? null : new self( $t );
  34                 # return $t == null ? null : new static( $t ); // PHP 5.3
  35         }
  36
  37         /**
  38          * @param $file File:
  39          * @return void
  40          */
  41         public function setFile( $file ) {
  42                 $this->mPage->setFile( $file );
  43                 $this->displayImg = $file;
  44                 $this->fileLoaded = true;
  45         }
  46
  47         protected function loadFile() {
  48                 if ( $this->fileLoaded ) {
  49                         return true;
  50                 }
  51                 $this->fileLoaded = true;
  52
  53                 $this->displayImg = $img = false;
  54                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  55                 if ( !$img ) { // not set by hook?
  56                         $img = wfFindFile( $this->getTitle() );
  57                         if ( !$img ) {
  58                                 $img = wfLocalFile( $this->getTitle() );
  59                         }
  60                 }
  61                 $this->mPage->setFile( $img );
  62                 if ( !$this->displayImg ) { // not set by hook?
  63                         $this->displayImg = $img;
  64                 }
  65                 $this->repo = $img->getRepo();
  66         }
  67
  68         /**
  69          * Handler for action=render
  70          * Include body text only; none of the image extras
  71          */
  72         public function render() {
  73                 global $wgOut;
  74                 $wgOut->setArticleBodyOnly( true );
  75                 parent::view();
  76         }
  77
  78         public function view() {
  79                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  80
  81                 $diff = $wgRequest->getVal( 'diff' );
  82                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  83
  84                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  85                         return parent::view();
  86                 }
  87
  88                 $this->loadFile();
  89
  90                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
  91                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || isset( $diff ) ) {
  92                                 // mTitle is the same as the redirect target so ask Article
  93                                 // to perform the redirect for us.
  94                                 $wgRequest->setVal( 'diffonly', 'true' );
  95                                 return parent::view();
  96                         } else {
  97                                 // mTitle is not the same as the redirect target so it is
  98                                 // probably the redirect page itself. Fake the redirect symbol
  99                                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 100                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 101                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 102                                 $this->mPage->viewUpdates();
 103                                 return;
 104                         }
 105                 }
 106
 107                 $this->showRedirectedFromHeader();
 108
 109                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 110                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 111                         $formattedMetadata = $this->displayImg->formatMetadata();
 112                         $showmeta = $formattedMetadata !== false;
 113                 } else {
 114                         $showmeta = false;
 115                 }
 116
 117                 if ( !$diff && $this->displayImg->exists() ) {
 118                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 119                 }
 120
 121                 if ( !$diff ) {
 122                         $this->openShowImage();
 123                 }
 124
 125                 # No need to display noarticletext, we use our own message, output in openShowImage()
 126                 if ( $this->mPage->getID() ) {
 127                         # NS_FILE is in the user language, but this section (the actual wikitext)
 128                         # should be in page content language
 129                         $pageLang = $this->getTitle()->getPageLanguage();
 130                         $wgOut->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 131                                 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
 132                                 'class' => 'mw-content-'.$pageLang->getDir() ) ) );
 133                         parent::view();
 134                         $wgOut->addHTML( Xml::closeElement( 'div' ) );
 135                 } else {
 136                         # Just need to set the right headers
 137                         $wgOut->setArticleFlag( true );
 138                         $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 139                         $this->mPage->viewUpdates();
 140                 }
 141
 142                 # Show shared description, if needed
 143                 if ( $this->mExtraDescription ) {
 144                         $fol = wfMessage( 'shareddescriptionfollows' );
 145                         if ( !$fol->isDisabled() ) {
 146                                 $wgOut->addWikiText( $fol->plain() );
 147                         }
 148                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 149                 }
 150
 151                 $this->closeShowImage();
 152                 $this->imageHistory();
 153                 // TODO: Cleanup the following
 154
 155                 $wgOut->addHTML( Xml::element( 'h2',
 156                         array( 'id' => 'filelinks' ),
 157                         wfMsg( 'imagelinks' ) ) . "\n" );
 158                 $this->imageDupes();
 159                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 160                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 161                 $this->imageLinks();
 162
 163                 # Allow extensions to add something after the image links
 164                 $html = '';
 165                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 166                 if ( $html ) {
 167                         $wgOut->addHTML( $html );
 168                 }
 169
 170                 if ( $showmeta ) {
 171                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 172                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 173                         $wgOut->addModules( array( 'mediawiki.action.view.metadata' ) );
 174                 }
 175
 176                 // Add remote Filepage.css
 177                 if( !$this->repo->isLocal() ) {
 178                         $css = $this->repo->getDescriptionStylesheetUrl();
 179                         if ( $css ) {
 180                                 $wgOut->addStyle( $css );
 181                         }
 182                 }
 183                 // always show the local local Filepage.css, bug 29277
 184                 $wgOut->addModuleStyles( 'filepage' );
 185         }
 186
 187         public function getDisplayedFile() {
 188                 $this->loadFile();
 189                 return $this->displayImg;
 190         }
 191
 192         /**
 193          * Create the TOC
 194          *
 195          * @param $metadata Boolean: whether or not to show the metadata link
 196          * @return String
 197          */
 198         protected function showTOC( $metadata ) {
 199                 $r = array(
 200                         '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 201                         '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 202                         '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 203                 );
 204                 if ( $metadata ) {
 205                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 206                 }
 207
 208                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 209
 210                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 211         }
 212
 213         /**
 214          * Make a table with metadata to be shown in the output page.
 215          *
 216          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 217          *
 218          * @param $metadata Array: the array containing the EXIF data
 219          * @return String The metadata table. This is treated as Wikitext (!)
 220          */
 221         protected function makeMetadataTable( $metadata ) {
 222                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 223                 $r .= wfMsgNoTrans( 'metadata-help' );
 224                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 225                 foreach ( $metadata as $type => $stuff ) {
 226                         foreach ( $stuff as $v ) {
 227                                 # @todo FIXME: Why is this using escapeId for a class?!
 228                                 $class = Sanitizer::escapeId( $v['id'] );
 229                                 if ( $type == 'collapsed' ) {
 230                                         $class .= ' collapsable';
 231                                 }
 232                                 $r .= "<tr class=\"$class\">\n";
 233                                 $r .= "<th>{$v['name']}</th>\n";
 234                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 235                         }
 236                 }
 237                 $r .= "</table>\n</div>\n";
 238                 return $r;
 239         }
 240
 241         /**
 242          * Overloading Article's getContent method.
 243          *
 244          * Omit noarticletext if sharedupload; text will be fetched from the
 245          * shared upload server if possible.
 246          */
 247         public function getContent() {
 248                 $this->loadFile();
 249                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 250                         return '';
 251                 }
 252                 return parent::getContent();
 253         }
 254
 255         protected function openShowImage() {
 256                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 257                         $wgLang, $wgEnableUploads;
 258
 259                 $this->loadFile();
 260
 261                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 262                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 263                         $sizeSel = User::getDefaultOption( 'imagesize' );
 264
 265                         // The user offset might still be incorrect, specially if
 266                         // $wgImageLimits got changed (see bug #8858).
 267                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 268                                 // Default to the first offset in $wgImageLimits
 269                                 $sizeSel = 0;
 270                         }
 271                 }
 272                 $max = $wgImageLimits[$sizeSel];
 273                 $maxWidth = $max[0];
 274                 $maxHeight = $max[1];
 275                 $dirmark = $wgLang->getDirMark();
 276
 277                 if ( $this->displayImg->exists() ) {
 278                         # image
 279                         $page = $wgRequest->getIntOrNull( 'page' );
 280                         if ( is_null( $page ) ) {
 281                                 $params = array();
 282                                 $page = 1;
 283                         } else {
 284                                 $params = array( 'page' => $page );
 285                         }
 286                         $width_orig = $this->displayImg->getWidth( $page );
 287                         $width = $width_orig;
 288                         $height_orig = $this->displayImg->getHeight( $page );
 289                         $height = $height_orig;
 290                         $mustRender = $this->displayImg->getHandler() &&
 291                                 $this->displayImg->getHandler()->mustRender( $this->displayImg );
 292                         $addFullResolutionLink = false;
 293
 294                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 295
 296                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 297
 298                         if ( $this->displayImg->allowInlineDisplay() ) {
 299                                 # image
 300
 301                                 # "Download high res version" link below the image
 302                                 # $msgsize = wfMsgHtml( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime );
 303                                 # We'll show a thumbnail of this image
 304                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 305                                         # Calculate the thumbnail size.
 306                                         # First case, the limiting factor is the width, not the height.
 307                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 308                                                 $height = round( $height * $maxWidth / $width );
 309                                                 $width = $maxWidth;
 310                                                 # Note that $height <= $maxHeight now.
 311                                         } else {
 312                                                 $newwidth = floor( $width * $maxHeight / $height );
 313                                                 $height = round( $height * $newwidth / $width );
 314                                                 $width = $newwidth;
 315                                                 # Note that $height <= $maxHeight now, but might not be identical
 316                                                 # because of rounding.
 317                                         }
 318
 319                                         $otherSizes = array();
 320                                         foreach ( $wgImageLimits as $size ) {
 321                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig &&
 322                                                                 $size[0] != $width && $size[1] != $height ) {
 323                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 324                                                 }
 325                                         }
 326                                         if ( $mustRender ) {
 327                                                 $otherSizes[] = $this->makeSizeLink( $params, $width_orig, $height_orig, 'show-big-image' );
 328                                         } else {
 329                                                 $addFullResolutionLink = true;
 330                                         }
 331                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 332                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 333                                                 parse() . ' ' .
 334                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 335                                                         wfMessage( 'show-big-image-other' )->
 336                                                         rawParams( $wgLang->pipeList( $otherSizes ), count( $otherSizes ) )->parse()
 337                                                 );
 338                                 } else {
 339                                         # Image is small enough to show full size on image page
 340                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 341                                 }
 342
 343                                 $params['width'] = $width;
 344                                 $params['height'] = $height;
 345                                 $thumbnail = $this->displayImg->transform( $params );
 346
 347                                 $showLink = true;
 348                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 349
 350                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 351                                 if ( $isMulti ) {
 352                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 353                                 }
 354
 355                                 if ( $thumbnail ) {
 356                                         $options = array(
 357                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 358                                                 'file-link' => !$mustRender,
 359                                         );
 360                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 361                                                 $thumbnail->toHtml( $options ) .
 362                                                 $anchorclose . "</div>\n" );
 363                                 }
 364
 365                                 if ( $isMulti ) {
 366                                         $count = $this->displayImg->pageCount();
 367
 368                                         if ( $page > 1 ) {
 369                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 370                                                 $link = Linker::link(
 371                                                         $this->getTitle(),
 372                                                         $label,
 373                                                         array(),
 374                                                         array( 'page' => $page - 1 ),
 375                                                         array( 'known', 'noclasses' )
 376                                                 );
 377                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 378                                                         array( 'page' => $page - 1 ) );
 379                                         } else {
 380                                                 $thumb1 = '';
 381                                         }
 382
 383                                         if ( $page < $count ) {
 384                                                 $label = wfMsg( 'imgmultipagenext' );
 385                                                 $link = Linker::link(
 386                                                         $this->getTitle(),
 387                                                         $label,
 388                                                         array(),
 389                                                         array( 'page' => $page + 1 ),
 390                                                         array( 'known', 'noclasses' )
 391                                                 );
 392                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 393                                                         array( 'page' => $page + 1 ) );
 394                                         } else {
 395                                                 $thumb2 = '';
 396                                         }
 397
 398                                         global $wgScript;
 399
 400                                         $formParams = array(
 401                                                 'name' => 'pageselector',
 402                                                 'action' => $wgScript,
 403                                                 'onchange' => 'document.pageselector.submit();',
 404                                         );
 405
 406                                         for ( $i = 1; $i <= $count; $i++ ) {
 407                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 408                                         }
 409                                         $select = Xml::tags( 'select',
 410                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 411                                                 implode( "\n", $options ) );
 412
 413                                         $wgOut->addHTML(
 414                                                 '</td><td><div class="multipageimagenavbox">' .
 415                                                 Xml::openElement( 'form', $formParams ) .
 416                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 417                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 418                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 419                                                 Xml::closeElement( 'form' ) .
 420                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 421                                         );
 422                                 }
 423                         } else {
 424                                 # if direct link is allowed but it's not a renderable image, show an icon.
 425                                 if ( $this->displayImg->isSafeFile() ) {
 426                                         $icon = $this->displayImg->iconThumb();
 427
 428                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 429                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 430                                                 "</div>\n" );
 431                                 }
 432
 433                                 $showLink = true;
 434                         }
 435
 436                         if ( $showLink ) {
 437                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 438                                 $linktext = $filename;
 439                                 if ( $addFullResolutionLink ) {
 440                                         $linktext = wfMsg( 'show-big-image' );
 441                                 }
 442                                 $medialink = "[[Media:$filename|$linktext]]";
 443
 444                                 if ( !$this->displayImg->isSafeFile() ) {
 445                                         $warning = wfMsgNoTrans( 'mediawarning' );
 446                                         $wgOut->addWikiText( <<<EOT
 447 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 448 <div class="mediaWarning">$warning</div>
 449 EOT
 450                                                 );
 451                                 } else {
 452                                         $wgOut->addWikiText( <<<EOT
 453 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 454 </div>
 455 EOT
 456                                         );
 457                                 }
 458                         }
 459
 460                         if ( !$this->displayImg->isLocal() ) {
 461                                 $this->printSharedImageText();
 462                         }
 463                 } else {
 464                         # Image does not exist
 465                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 466                                 // Only show an upload link if the user can upload
 467                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 468                                 $nofile = array(
 469                                         'filepage-nofile-link',
 470                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 471                                 );
 472                         } else {
 473                                 $nofile = 'filepage-nofile';
 474                         }
 475                         // Note, if there is an image description page, but
 476                         // no image, then this setRobotPolicy is overriden
 477                         // by Article::View().
 478                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 479                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 480                         if ( !$this->getID() ) {
 481                                 // If there is no image, no shared image, and no description page,
 482                                 // output a 404, to be consistent with articles.
 483                                 $wgRequest->response()->header( 'HTTP/1.1 404 Not Found' );
 484                         }
 485                 }
 486                 $wgOut->setFileVersion( $this->displayImg );
 487         }
 488
 489         /**
 490          * Creates an thumbnail of specified size and returns an HTML link to it
 491          * @param array $params Scaler parameters
 492          * @param int $width
 493          * @param int $height
 494          */
 495         private function makeSizeLink( $params, $width, $height, $msg = 'show-big-image-size' ) {
 496                 $params['width'] = $width;
 497                 $params['height'] = $height;
 498                 $thumbnail = $this->displayImg->transform( $params );
 499                 if ( $thumbnail && !$thumbnail->isError() ) {
 500                         return Html::rawElement( 'a', array(
 501                                 'href' => $thumbnail->getUrl(),
 502                                 'class' => 'mw-thumbnail-link'
 503                                 ), wfMessage( $msg )->numParams(
 504                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 505                                 )->parse() );
 506                 } else {
 507                         return '';
 508                 }
 509         }
 510
 511         /**
 512          * Show a notice that the file is from a shared repository
 513          */
 514         protected function printSharedImageText() {
 515                 global $wgOut;
 516
 517                 $this->loadFile();
 518
 519                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 520                 $descText = $this->mPage->getFile()->getDescriptionText();
 521
 522                 /* Add canonical to head if there is no local page for this shared file */
 523                 if( $descUrl && $this->mPage->getID() == 0 ) {
 524                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 525                 }
 526
 527                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 528                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 529
 530                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 531                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 532                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 533                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 534                 } else {
 535                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 536                 }
 537
 538                 if ( $descText ) {
 539                         $this->mExtraDescription = $descText;
 540                 }
 541         }
 542
 543         public function getUploadUrl() {
 544                 $this->loadFile();
 545                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 546                 return $uploadTitle->getFullURL( array(
 547                         'wpDestFile' => $this->mPage->getFile()->getName(),
 548                         'wpForReUpload' => 1
 549                  ) );
 550         }
 551
 552         /**
 553          * Print out the various links at the bottom of the image page, e.g. reupload,
 554          * external editing (and instructions link) etc.
 555          */
 556         protected function uploadLinksBox() {
 557                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 558
 559                 if ( !$wgEnableUploads ) {
 560                         return;
 561                 }
 562
 563                 $this->loadFile();
 564                 if ( !$this->mPage->getFile()->isLocal() ) {
 565                         return;
 566                 }
 567
 568                 $wgOut->addHTML( "<br /><ul>\n" );
 569
 570                 # "Upload a new version of this file" link
 571                 if ( UploadBase::userCanReUpload( $wgUser, $this->mPage->getFile()->name ) ) {
 572                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 573                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 574                 }
 575
 576                 # External editing link
 577                 if ( $wgUseExternalEditor ) {
 578                         $elink = Linker::link(
 579                                 $this->getTitle(),
 580                                 wfMsgHtml( 'edit-externally' ),
 581                                 array(),
 582                                 array(
 583                                         'action' => 'edit',
 584                                         'externaledit' => 'true',
 585                                         'mode' => 'file'
 586                                 ),
 587                                 array( 'known', 'noclasses' )
 588                         );
 589                         $wgOut->addHTML(
 590                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 591                                 wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) .
 592                                 "</small></li>\n"
 593                         );
 594                 }
 595
 596                 $wgOut->addHTML( "</ul>\n" );
 597         }
 598
 599         protected function closeShowImage() { } # For overloading
 600
 601         /**
 602          * If the page we've just displayed is in the "Image" namespace,
 603          * we follow it with an upload history of the image and its usage.
 604          */
 605         protected function imageHistory() {
 606                 global $wgOut;
 607
 608                 $this->loadFile();
 609                 $pager = new ImageHistoryPseudoPager( $this );
 610                 $wgOut->addHTML( $pager->getBody() );
 611                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 612
 613                 $this->mPage->getFile()->resetHistory(); // free db resources
 614
 615                 # Exist check because we don't want to show this on pages where an image
 616                 # doesn't exist along with the noimage message, that would suck. -ævar
 617                 if ( $this->mPage->getFile()->exists() ) {
 618                         $this->uploadLinksBox();
 619                 }
 620         }
 621
 622         protected function queryImageLinks( $target, $limit ) {
 623                 $dbr = wfGetDB( DB_SLAVE );
 624
 625                 return $dbr->select(
 626                         array( 'imagelinks', 'page' ),
 627                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 628                         array( 'il_to' => $target, 'il_from = page_id' ),
 629                         __METHOD__,
 630                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 631                 );
 632         }
 633
 634         protected function imageLinks() {
 635                 global $wgOut, $wgLang;
 636
 637                 $limit = 100;
 638
 639                 $res = $this->queryImageLinks( $this->getTitle()->getDbKey(), $limit + 1);
 640                 $rows = array();
 641                 $redirects = array();
 642                 foreach ( $res as $row ) {
 643                         if ( $row->page_is_redirect ) {
 644                                 $redirects[$row->page_title] = array();
 645                         }
 646                         $rows[] = $row;
 647                 }
 648                 $count = count( $rows );
 649
 650                 $hasMore = $count > $limit;
 651                 if ( !$hasMore && count( $redirects ) ) {
 652                         $res = $this->queryImageLinks( array_keys( $redirects ),
 653                                 $limit - count( $rows ) + 1 );
 654                         foreach ( $res as $row ) {
 655                                 $redirects[$row->il_to][] = $row;
 656                                 $count++;
 657                         }
 658                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 659                 }
 660
 661                 if ( $count == 0 ) {
 662                         $wgOut->wrapWikiMsg(
 663                                 Html::rawElement( 'div',
 664                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 665                                 'nolinkstoimage'
 666                         );
 667                         return;
 668                 }
 669
 670                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 671                 if ( !$hasMore ) {
 672                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 673                 } else {
 674                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 675                         $wgOut->addWikiMsg( 'linkstoimage-more',
 676                                 $wgLang->formatNum( $limit ),
 677                                 $this->getTitle()->getPrefixedDBkey()
 678                         );
 679                 }
 680
 681                 $wgOut->addHTML(
 682                         Html::openElement( 'ul',
 683                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 684                 );
 685                 $count = 0;
 686
 687                 // Sort the list by namespace:title
 688                 usort( $rows, array( $this, 'compare' ) );
 689
 690                 // Create links for every element
 691                 $currentCount = 0;
 692                 foreach( $rows as $element ) {
 693                         $currentCount++;
 694                         if ( $currentCount > $limit ) {
 695                                 break;
 696                         }
 697
 698                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 699                         if ( !isset( $redirects[$element->page_title] ) ) {
 700                                 $liContents = $link;
 701                         } else {
 702                                 $ul = "<ul class='mw-imagepage-redirectstofile'>\n";
 703                                 foreach ( $redirects[$element->page_title] as $row ) {
 704                                         $currentCount++;
 705                                         if ( $currentCount > $limit ) {
 706                                                 break;
 707                                         }
 708
 709                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 710                                         $ul .= Html::rawElement(
 711                                                 'li',
 712                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 713                                                 $link2
 714                                                 ) . "\n";
 715                                 }
 716                                 $ul .= '</ul>';
 717                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 718                                         $link, $ul )->parse();
 719                         }
 720                         $wgOut->addHTML( Html::rawElement(
 721                                         'li',
 722                                         array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 723                                         $liContents
 724                                 ) . "\n"
 725                         );
 726
 727                 };
 728                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 729                 $res->free();
 730
 731                 // Add a links to [[Special:Whatlinkshere]]
 732                 if ( $count > $limit ) {
 733                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 734                 }
 735                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 736         }
 737
 738         protected function imageDupes() {
 739                 global $wgOut, $wgLang;
 740
 741                 $this->loadFile();
 742
 743                 $dupes = $this->mPage->getDuplicates();
 744                 if ( count( $dupes ) == 0 ) {
 745                         return;
 746                 }
 747
 748                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 749                 $wgOut->addWikiMsg( 'duplicatesoffile',
 750                         $wgLang->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 751                 );
 752                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 753
 754                 foreach ( $dupes as $file ) {
 755                         $fromSrc = '';
 756                         if ( $file->isLocal() ) {
 757                                 $link = Linker::link(
 758                                         $file->getTitle(),
 759                                         null,
 760                                         array(),
 761                                         array(),
 762                                         array( 'known', 'noclasses' )
 763                                 );
 764                         } else {
 765                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 766                                         $file->getTitle()->getPrefixedText() );
 767                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 768                         }
 769                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 770                 }
 771                 $wgOut->addHTML( "</ul></div>\n" );
 772         }
 773
 774         /**
 775          * Delete the file, or an earlier version of it
 776          */
 777         public function delete() {
 778                 global $wgUploadMaintenance;
 779                 if ( $wgUploadMaintenance && $this->getTitle() && $this->getTitle()->getNamespace() == NS_FILE ) {
 780                         global $wgOut;
 781                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
 782                         return;
 783                 }
 784
 785                 $this->loadFile();
 786                 if ( !$this->mPage->getFile()->exists() || !$this->mPage->getFile()->isLocal() || $this->mPage->getFile()->getRedirected() ) {
 787                         // Standard article deletion
 788                         parent::delete();
 789                         return;
 790                 }
 791                 $deleter = new FileDeleteForm( $this->mPage->getFile() );
 792                 $deleter->execute();
 793         }
 794
 795         /**
 796          * Display an error with a wikitext description
 797          *
 798          * @param $description String
 799          */
 800         function showError( $description ) {
 801                 global $wgOut;
 802                 $wgOut->setPageTitle( wfMsg( 'internalerror' ) );
 803                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 804                 $wgOut->setArticleRelated( false );
 805                 $wgOut->enableClientCache( false );
 806                 $wgOut->addWikiText( $description );
 807         }
 808
 809         /**
 810          * Callback for usort() to do link sorts by (namespace, title)
 811          * Function copied from Title::compare()
 812          *
 813          * @param $a object page to compare with
 814          * @param $b object page to compare with
 815          * @return Integer: result of string comparison, or namespace comparison
 816          */
 817         protected function compare( $a, $b ) {
 818                 if ( $a->page_namespace == $b->page_namespace ) {
 819                         return strcmp( $a->page_title, $b->page_title );
 820                 } else {
 821                         return $a->page_namespace - $b->page_namespace;
 822                 }
 823         }
 824 }
 825
 826 /**
 827  * Builds the image revision log shown on image pages
 828  *
 829  * @ingroup Media
 830  */
 831 class ImageHistoryList {
 832
 833         /**
 834          * @var Title
 835          */
 836         protected $title;
 837
 838         /**
 839          * @var File
 840          */
 841         protected $img;
 842
 843         /**
 844          * @var ImagePage
 845          */
 846         protected $imagePage;
 847
 848         protected $repo, $showThumb;
 849         protected $preventClickjacking = false;
 850
 851         /**
 852          * @param ImagePage $imagePage
 853          */
 854         public function __construct( $imagePage ) {
 855                 global $wgShowArchiveThumbnails;
 856                 $this->current = $imagePage->getFile();
 857                 $this->img = $imagePage->getDisplayedFile();
 858                 $this->title = $imagePage->getTitle();
 859                 $this->imagePage = $imagePage;
 860                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 861         }
 862
 863         public function getImagePage() {
 864                 return $this->imagePage;
 865         }
 866
 867         public function getFile() {
 868                 return $this->img;
 869         }
 870
 871         public function beginImageHistoryList( $navLinks = '' ) {
 872                 global $wgOut, $wgUser;
 873                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 874                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 875                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 876                         . $navLinks . "\n"
 877                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 878                         . '<tr><td></td>'
 879                         . ( $this->current->isLocal() && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 880                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 881                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 882                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 883                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 884                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 885                         . "</tr>\n";
 886         }
 887
 888         public function endImageHistoryList( $navLinks = '' ) {
 889                 return "</table>\n$navLinks\n</div>\n";
 890         }
 891
 892         /**
 893          * @param $iscur
 894          * @param $file File
 895          * @return string
 896          */
 897         public function imageHistoryLine( $iscur, $file ) {
 898                 global $wgUser, $wgLang, $wgContLang;
 899
 900                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 901                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 902                 $user = $file->getUser( 'id' );
 903                 $usertext = $file->getUser( 'text' );
 904                 $description = $file->getDescription();
 905
 906                 $local = $this->current->isLocal();
 907                 $row = $selected = '';
 908
 909                 // Deletion link
 910                 if ( $local && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
 911                         $row .= '<td>';
 912                         # Link to remove from history
 913                         if ( $wgUser->isAllowed( 'delete' ) ) {
 914                                 $q = array( 'action' => 'delete' );
 915                                 if ( !$iscur ) {
 916                                         $q['oldimage'] = $img;
 917                                 }
 918                                 $row .= Linker::link(
 919                                         $this->title,
 920                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 921                                         array(), $q, array( 'known' )
 922                                 );
 923                         }
 924                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 925                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 926                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 927                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 928                                         $row .= '<br />';
 929                                 }
 930                                 // If file is top revision or locked from this user, don't link
 931                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 932                                         $del = Linker::revDeleteLinkDisabled( $canHide );
 933                                 } else {
 934                                         list( $ts, $name ) = explode( '!', $img, 2 );
 935                                         $query = array(
 936                                                 'type'   => 'oldimage',
 937                                                 'target' => $this->title->getPrefixedText(),
 938                                                 'ids'    => $ts,
 939                                         );
 940                                         $del = Linker::revDeleteLink( $query,
 941                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 942                                 }
 943                                 $row .= $del;
 944                         }
 945                         $row .= '</td>';
 946                 }
 947
 948                 // Reversion link/current indicator
 949                 $row .= '<td>';
 950                 if ( $iscur ) {
 951                         $row .= wfMsgHtml( 'filehist-current' );
 952                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 953                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 954                                 $row .= wfMsgHtml( 'filehist-revert' );
 955                         } else {
 956                                 $row .= Linker::link(
 957                                         $this->title,
 958                                         wfMsgHtml( 'filehist-revert' ),
 959                                         array(),
 960                                         array(
 961                                                 'action' => 'revert',
 962                                                 'oldimage' => $img,
 963                                                 'wpEditToken' => $wgUser->editToken( $img )
 964                                         ),
 965                                         array( 'known', 'noclasses' )
 966                                 );
 967                         }
 968                 }
 969                 $row .= '</td>';
 970
 971                 // Date/time and image link
 972                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
 973                         $selected = "class='filehistory-selected'";
 974                 }
 975                 $row .= "<td $selected style='white-space: nowrap;'>";
 976                 if ( !$file->userCan( File::DELETED_FILE ) ) {
 977                         # Don't link to unviewable files
 978                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 979                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
 980                         if ( $local ) {
 981                                 $this->preventClickjacking();
 982                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 983                                 # Make a link to review the image
 984                                 $url = Linker::link(
 985                                         $revdel,
 986                                         $wgLang->timeAndDate( $timestamp, true ),
 987                                         array(),
 988                                         array(
 989                                                 'target' => $this->title->getPrefixedText(),
 990                                                 'file' => $img,
 991                                                 'token' => $wgUser->editToken( $img )
 992                                         ),
 993                                         array( 'known', 'noclasses' )
 994                                 );
 995                         } else {
 996                                 $url = $wgLang->timeAndDate( $timestamp, true );
 997                         }
 998                         $row .= '<span class="history-deleted">' . $url . '</span>';
 999                 } else {
1000                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1001                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
1002                 }
1003                 $row .= "</td>";
1004
1005                 // Thumbnail
1006                 if ( $this->showThumb ) {
1007                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1008                 }
1009
1010                 // Image dimensions + size
1011                 $row .= '<td>';
1012                 $row .= htmlspecialchars( $file->getDimensionsString() );
1013                 $row .= ' <span style="white-space: nowrap;">(' . Linker::formatSize( $file->getSize() ) . ')</span>';
1014                 $row .= '</td>';
1015
1016                 // Uploading user
1017                 $row .= '<td>';
1018                 // Hide deleted usernames
1019                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1020                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1021                 } else {
1022                         if ( $local ) {
1023                                 $row .= Linker::userLink( $user, $usertext ) . ' <span style="white-space: nowrap;">' .
1024                                 Linker::userToolLinks( $user, $usertext ) . '</span>';
1025                         } else {
1026                                 $row .= htmlspecialchars( $usertext );
1027                         }
1028                 }
1029                 $row .= '</td>';
1030
1031                 // Don't show deleted descriptions
1032                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1033                         $row .= '<td><span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></td>';
1034                 } else {
1035                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::commentBlock( $description, $this->title ) . '</td>';
1036                 }
1037
1038                 $rowClass = null;
1039                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1040                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1041
1042                 return "<tr{$classAttr}>{$row}</tr>\n";
1043         }
1044
1045         /**
1046          * @param $file File
1047          * @return string
1048          */
1049         protected function getThumbForLine( $file ) {
1050                 global $wgLang;
1051
1052                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1053                         $params = array(
1054                                 'width' => '120',
1055                                 'height' => '120',
1056                         );
1057                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1058
1059                         $thumbnail = $file->transform( $params );
1060                         $options = array(
1061                                 'alt' => wfMsg( 'filehist-thumbtext',
1062                                         $wgLang->timeAndDate( $timestamp, true ),
1063                                         $wgLang->date( $timestamp, true ),
1064                                         $wgLang->time( $timestamp, true ) ),
1065                                 'file-link' => true,
1066                         );
1067
1068                         if ( !$thumbnail ) {
1069                                 return wfMsgHtml( 'filehist-nothumb' );
1070                         }
1071
1072                         return $thumbnail->toHtml( $options );
1073                 } else {
1074                         return wfMsgHtml( 'filehist-nothumb' );
1075                 }
1076         }
1077
1078         protected function preventClickjacking( $enable = true ) {
1079                 $this->preventClickjacking = $enable;
1080         }
1081
1082         public function getPreventClickjacking() {
1083                 return $this->preventClickjacking;
1084         }
1085 }
1086
1087 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1088         protected $preventClickjacking = false;
1089
1090         /**
1091          * @var File
1092          */
1093         protected $mImg;
1094
1095         /**
1096          * @var Title
1097          */
1098         protected $mTitle;
1099
1100         /**
1101          * @param ImagePage $imagePage
1102          */
1103         function __construct( $imagePage ) {
1104                 parent::__construct();
1105                 $this->mImagePage = $imagePage;
1106                 $this->mTitle = clone ( $imagePage->getTitle() );
1107                 $this->mTitle->setFragment( '#filehistory' );
1108                 $this->mImg = null;
1109                 $this->mHist = array();
1110                 $this->mRange = array( 0, 0 ); // display range
1111         }
1112
1113         function getTitle() {
1114                 return $this->mTitle;
1115         }
1116
1117         function getQueryInfo() {
1118                 return false;
1119         }
1120
1121         function getIndexField() {
1122                 return '';
1123         }
1124
1125         function formatRow( $row ) {
1126                 return '';
1127         }
1128
1129         function getBody() {
1130                 $s = '';
1131                 $this->doQuery();
1132                 if ( count( $this->mHist ) ) {
1133                         $list = new ImageHistoryList( $this->mImagePage );
1134                         # Generate prev/next links
1135                         $navLink = $this->getNavigationBar();
1136                         $s = $list->beginImageHistoryList( $navLink );
1137                         // Skip rows there just for paging links
1138                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1139                                 $file = $this->mHist[$i];
1140                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1141                         }
1142                         $s .= $list->endImageHistoryList( $navLink );
1143
1144                         if ( $list->getPreventClickjacking() ) {
1145                                 $this->preventClickjacking();
1146                         }
1147                 }
1148                 return $s;
1149         }
1150
1151         function doQuery() {
1152                 if ( $this->mQueryDone ) {
1153                         return;
1154                 }
1155                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1156                 if ( !$this->mImg->exists() ) {
1157                         return;
1158                 }
1159                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1160                 if ( $this->mIsBackwards ) {
1161                         // Fetch the file history
1162                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1163                         // The current rev may not meet the offset/limit
1164                         $numRows = count( $this->mHist );
1165                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1166                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1167                         }
1168                 } else {
1169                         // The current rev may not meet the offset
1170                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1171                                 $this->mHist[] = $this->mImg;
1172                         }
1173                         // Old image versions (fetch extra row for nav links)
1174                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1175                         // Fetch the file history
1176                         $this->mHist = array_merge( $this->mHist,
1177                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1178                 }
1179                 $numRows = count( $this->mHist ); // Total number of query results
1180                 if ( $numRows ) {
1181                         # Index value of top item in the list
1182                         $firstIndex = $this->mIsBackwards ?
1183                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1184                         # Discard the extra result row if there is one
1185                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1186                                 if ( $this->mIsBackwards ) {
1187                                         # Index value of item past the index
1188                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1189                                         # Index value of bottom item in the list
1190                                         $lastIndex = $this->mHist[1]->getTimestamp();
1191                                         # Display range
1192                                         $this->mRange = array( 1, $numRows - 1 );
1193                                 } else {
1194                                         # Index value of item past the index
1195                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1196                                         # Index value of bottom item in the list
1197                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1198                                         # Display range
1199                                         $this->mRange = array( 0, $numRows - 2 );
1200                                 }
1201                         } else {
1202                                 # Setting indexes to an empty string means that they will be
1203                                 # omitted if they would otherwise appear in URLs. It just so
1204                                 # happens that this  is the right thing to do in the standard
1205                                 # UI, in all the relevant cases.
1206                                 $this->mPastTheEndIndex = '';
1207                                 # Index value of bottom item in the list
1208                                 $lastIndex = $this->mIsBackwards ?
1209                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1210                                 # Display range
1211                                 $this->mRange = array( 0, $numRows - 1 );
1212                         }
1213                 } else {
1214                         $firstIndex = '';
1215                         $lastIndex = '';
1216                         $this->mPastTheEndIndex = '';
1217                 }
1218                 if ( $this->mIsBackwards ) {
1219                         $this->mIsFirst = ( $numRows < $queryLimit );
1220                         $this->mIsLast = ( $this->mOffset == '' );
1221                         $this->mLastShown = $firstIndex;
1222                         $this->mFirstShown = $lastIndex;
1223                 } else {
1224                         $this->mIsFirst = ( $this->mOffset == '' );
1225                         $this->mIsLast = ( $numRows < $queryLimit );
1226                         $this->mLastShown = $lastIndex;
1227                         $this->mFirstShown = $firstIndex;
1228                 }
1229                 $this->mQueryDone = true;
1230         }
1231
1232         protected function preventClickjacking( $enable = true ) {
1233                 $this->preventClickjacking = $enable;
1234         }
1235
1236         public function getPreventClickjacking() {
1237                 return $this->preventClickjacking;
1238         }
1239
1240 }