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