includes/ImagePage.php

   1 <?php
   2
   3 /**
   4  * Special handling for image description pages
   5  *
   6  * @ingroup Media
   7  */
   8 class ImagePage extends Article {
   9
  10         /**
  11          * @var File
  12          */
  13         private $img;
  14         private $displayImg;
  15         private $repo;
  16         private $fileLoaded;
  17
  18         var $mExtraDescription = false;
  19         var $dupes;
  20
  21         function __construct( $title ) {
  22                 parent::__construct( $title );
  23                 $this->dupes = null;
  24                 $this->repo = null;
  25         }
  26
  27         /**
  28          * @param $file File:
  29          * @return void
  30          */
  31         public function setFile( $file ) {
  32                 $this->displayImg = $file;
  33                 $this->img = $file;
  34                 $this->fileLoaded = true;
  35         }
  36
  37         protected function loadFile() {
  38                 if ( $this->fileLoaded ) {
  39                         return true;
  40                 }
  41                 $this->fileLoaded = true;
  42
  43                 $this->displayImg = $this->img = false;
  44                 wfRunHooks( 'ImagePageFindFile', array( $this, &$this->img, &$this->displayImg ) );
  45                 if ( !$this->img ) {
  46                         $this->img = wfFindFile( $this->mTitle );
  47                         if ( !$this->img ) {
  48                                 $this->img = wfLocalFile( $this->mTitle );
  49                         }
  50                 }
  51                 if ( !$this->displayImg ) {
  52                         $this->displayImg = $this->img;
  53                 }
  54                 $this->repo = $this->img->getRepo();
  55         }
  56
  57         /**
  58          * Handler for action=render
  59          * Include body text only; none of the image extras
  60          */
  61         public function render() {
  62                 global $wgOut;
  63                 $wgOut->setArticleBodyOnly( true );
  64                 parent::view();
  65         }
  66
  67         public function view() {
  68                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  69
  70                 $diff = $wgRequest->getVal( 'diff' );
  71                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  72
  73                 if ( $this->mTitle->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  74                         return parent::view();
  75                 }
  76
  77                 $this->loadFile();
  78
  79                 if ( $this->mTitle->getNamespace() == NS_FILE && $this->img->getRedirected() ) {
  80                         if ( $this->mTitle->getDBkey() == $this->img->getName() || isset( $diff ) ) {
  81                                 // mTitle is the same as the redirect target so ask Article
  82                                 // to perform the redirect for us.
  83                                 $wgRequest->setVal( 'diffonly', 'true' );
  84                                 return parent::view();
  85                         } else {
  86                                 // mTitle is not the same as the redirect target so it is
  87                                 // probably the redirect page itself. Fake the redirect symbol
  88                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  89                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->img->getName() ),
  90                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
  91                                 $this->viewUpdates();
  92                                 return;
  93                         }
  94                 }
  95
  96                 $this->showRedirectedFromHeader();
  97
  98                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
  99                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
 100                         $formattedMetadata = $this->displayImg->formatMetadata();
 101                         $showmeta = $formattedMetadata !== false;
 102                 } else {
 103                         $showmeta = false;
 104                 }
 105
 106                 if ( !$diff && $this->displayImg->exists() ) {
 107                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 108                 }
 109
 110                 if ( !$diff ) {
 111                         $this->openShowImage();
 112                 }
 113
 114                 # No need to display noarticletext, we use our own message, output in openShowImage()
 115                 if ( $this->getID() ) {
 116                         parent::view();
 117                 } else {
 118                         # Just need to set the right headers
 119                         $wgOut->setArticleFlag( true );
 120                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 121                         $this->viewUpdates();
 122                 }
 123
 124                 # Show shared description, if needed
 125                 if ( $this->mExtraDescription ) {
 126                         $fol = wfMessage( 'shareddescriptionfollows' );
 127                         if ( !$fol->isDisabled() ) {
 128                                 $wgOut->addWikiText( $fol->plain() );
 129                         }
 130                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 131                 }
 132
 133                 $this->closeShowImage();
 134                 $this->imageHistory();
 135                 // TODO: Cleanup the following
 136
 137                 $wgOut->addHTML( Xml::element( 'h2',
 138                         array( 'id' => 'filelinks' ),
 139                         wfMsg( 'imagelinks' ) ) . "\n" );
 140                 $this->imageDupes();
 141                 # TODO! FIXME! For some freaky reason, we can't redirect to foreign images.
 142                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 143                 $this->imageRedirects();
 144                 $this->imageLinks();
 145
 146                 # Allow extensions to add something after the image links
 147                 $html = '';
 148                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 149                 if ( $html ) {
 150                         $wgOut->addHTML( $html );
 151                 }
 152
 153                 if ( $showmeta ) {
 154                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 155                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 156                         $wgOut->addModules( array( 'mediawiki.action.view.metadata' ) );
 157                 }
 158
 159                 $css = $this->repo->getDescriptionStylesheetUrl();
 160                 if ( $css ) {
 161                         $wgOut->addStyle( $css );
 162                 }
 163         }
 164
 165         public function getRedirectTarget() {
 166                 $this->loadFile();
 167                 if ( $this->img->isLocal() ) {
 168                         return parent::getRedirectTarget();
 169                 }
 170                 // Foreign image page
 171                 $from = $this->img->getRedirected();
 172                 $to = $this->img->getName();
 173                 if ( $from == $to ) {
 174                         return null;
 175                 }
 176                 return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
 177         }
 178
 179         public function followRedirect() {
 180                 $this->loadFile();
 181                 if ( $this->img->isLocal() ) {
 182                         return parent::followRedirect();
 183                 }
 184                 $from = $this->img->getRedirected();
 185                 $to = $this->img->getName();
 186                 if ( $from == $to ) {
 187                         return false;
 188                 }
 189                 return Title::makeTitle( NS_FILE, $to );
 190         }
 191
 192         public function isRedirect( $text = false ) {
 193                 $this->loadFile();
 194                 if ( $this->img->isLocal() ) {
 195                         return parent::isRedirect( $text );
 196                 }
 197
 198                 return (bool)$this->img->getRedirected();
 199         }
 200
 201         public function isLocal() {
 202                 $this->loadFile();
 203                 return $this->img->isLocal();
 204         }
 205
 206         public function getFile() {
 207                 $this->loadFile();
 208                 return $this->img;
 209         }
 210
 211         public function getDisplayedFile() {
 212                 $this->loadFile();
 213                 return $this->displayImg;
 214         }
 215
 216         public function getDuplicates() {
 217                 $this->loadFile();
 218                 if ( !is_null( $this->dupes ) ) {
 219                         return $this->dupes;
 220                 }
 221                 $hash = $this->img->getSha1();
 222                 if ( !( $hash ) ) {
 223                         return $this->dupes = array();
 224                 }
 225                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 226                 // Remove duplicates with self and non matching file sizes
 227                 $self = $this->img->getRepoName() . ':' . $this->img->getName();
 228                 $size = $this->img->getSize();
 229                 foreach ( $dupes as $index => $file ) {
 230                         $key = $file->getRepoName() . ':' . $file->getName();
 231                         if ( $key == $self ) {
 232                                 unset( $dupes[$index] );
 233                         }
 234                         if ( $file->getSize() != $size ) {
 235                                 unset( $dupes[$index] );
 236                         }
 237                 }
 238                 return $this->dupes = $dupes;
 239         }
 240
 241         /**
 242          * Create the TOC
 243          *
 244          * @param $metadata Boolean: whether or not to show the metadata link
 245          * @return String
 246          */
 247         protected function showTOC( $metadata ) {
 248                 $r = array(
 249                         '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 250                         '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 251                         '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 252                 );
 253                 if ( $metadata ) {
 254                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 255                 }
 256
 257                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 258
 259                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 260         }
 261
 262         /**
 263          * Make a table with metadata to be shown in the output page.
 264          *
 265          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 266          *
 267          * @param $metadata Array: the array containing the EXIF data
 268          * @return String The metadata table. This is treated as Wikitext (!)
 269          */
 270         protected function makeMetadataTable( $metadata ) {
 271                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 272                 $r .= wfMsgNoTrans( 'metadata-help' );
 273                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 274                 foreach ( $metadata as $type => $stuff ) {
 275                         foreach ( $stuff as $v ) {
 276                                 # FIXME, why is this using escapeId for a class?!
 277                                 $class = Sanitizer::escapeId( $v['id'] );
 278                                 if ( $type == 'collapsed' ) {
 279                                         $class .= ' collapsable';
 280                                 }
 281                                 $r .= "<tr class=\"$class\">\n";
 282                                 $r .= "<th>{$v['name']}</th>\n";
 283                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 284                         }
 285                 }
 286                 $r .= "</table>\n</div>\n";
 287                 return $r;
 288         }
 289
 290         /**
 291          * Overloading Article's getContent method.
 292          *
 293          * Omit noarticletext if sharedupload; text will be fetched from the
 294          * shared upload server if possible.
 295          */
 296         public function getContent() {
 297                 $this->loadFile();
 298                 if ( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 299                         return '';
 300                 }
 301                 return parent::getContent();
 302         }
 303
 304         protected function openShowImage() {
 305                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 306                         $wgLang, $wgContLang, $wgEnableUploads;
 307
 308                 $this->loadFile();
 309
 310                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 311                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 312                         $sizeSel = User::getDefaultOption( 'imagesize' );
 313
 314                         // The user offset might still be incorrect, specially if
 315                         // $wgImageLimits got changed (see bug #8858).
 316                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 317                                 // Default to the first offset in $wgImageLimits
 318                                 $sizeSel = 0;
 319                         }
 320                 }
 321                 $max = $wgImageLimits[$sizeSel];
 322                 $maxWidth = $max[0];
 323                 $maxHeight = $max[1];
 324                 $sk = $wgUser->getSkin();
 325                 $dirmark = $wgContLang->getDirMark();
 326
 327                 if ( $this->displayImg->exists() ) {
 328                         # image
 329                         $page = $wgRequest->getIntOrNull( 'page' );
 330                         if ( is_null( $page ) ) {
 331                                 $params = array();
 332                                 $page = 1;
 333                         } else {
 334                                 $params = array( 'page' => $page );
 335                         }
 336                         $width_orig = $this->displayImg->getWidth( $page );
 337                         $width = $width_orig;
 338                         $height_orig = $this->displayImg->getHeight( $page );
 339                         $height = $height_orig;
 340
 341                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 342
 343                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 344
 345                         if ( $this->displayImg->allowInlineDisplay() ) {
 346                                 # image
 347
 348                                 # "Download high res version" link below the image
 349                                 # $msgsize = wfMsgHtml( 'file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 350                                 # We'll show a thumbnail of this image
 351                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 352                                         # Calculate the thumbnail size.
 353                                         # First case, the limiting factor is the width, not the height.
 354                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 355                                                 $height = round( $height * $maxWidth / $width );
 356                                                 $width = $maxWidth;
 357                                                 # Note that $height <= $maxHeight now.
 358                                         } else {
 359                                                 $newwidth = floor( $width * $maxHeight / $height );
 360                                                 $height = round( $height * $newwidth / $width );
 361                                                 $width = $newwidth;
 362                                                 # Note that $height <= $maxHeight now, but might not be identical
 363                                                 # because of rounding.
 364                                         }
 365                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 366                                         $otherSizes = array();
 367                                         foreach ( $wgImageLimits as $size ) {
 368                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig &&
 369                                                                 $size[0] != $width && $size[1] != $height ) {
 370                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 371                                                 }
 372                                         }
 373                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 374                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 375                                                 parse() . ' ' .
 376                                                 wfMessage( 'show-big-image-other' )->
 377                                                 rawParams( $wgLang->pipeList( $otherSizes ) )->parse();
 378                                 } else {
 379                                         # Image is small enough to show full size on image page
 380                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 381                                 }
 382
 383                                 $params['width'] = $width;
 384                                 $params['height'] = $height;
 385                                 $thumbnail = $this->displayImg->transform( $params );
 386
 387                                 $showLink = true;
 388                                 $anchorclose = '<br />' . $msgsmall;
 389
 390                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 391                                 if ( $isMulti ) {
 392                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 393                                 }
 394
 395                                 if ( $thumbnail ) {
 396                                         $options = array(
 397                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 398                                                 'file-link' => true,
 399                                         );
 400                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 401                                                 $thumbnail->toHtml( $options ) .
 402                                                 $anchorclose . "</div>\n" );
 403                                 }
 404
 405                                 if ( $isMulti ) {
 406                                         $count = $this->displayImg->pageCount();
 407
 408                                         if ( $page > 1 ) {
 409                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 410                                                 $link = $sk->link(
 411                                                         $this->mTitle,
 412                                                         $label,
 413                                                         array(),
 414                                                         array( 'page' => $page - 1 ),
 415                                                         array( 'known', 'noclasses' )
 416                                                 );
 417                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 418                                                         array( 'page' => $page - 1 ) );
 419                                         } else {
 420                                                 $thumb1 = '';
 421                                         }
 422
 423                                         if ( $page < $count ) {
 424                                                 $label = wfMsg( 'imgmultipagenext' );
 425                                                 $link = $sk->link(
 426                                                         $this->mTitle,
 427                                                         $label,
 428                                                         array(),
 429                                                         array( 'page' => $page + 1 ),
 430                                                         array( 'known', 'noclasses' )
 431                                                 );
 432                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 433                                                         array( 'page' => $page + 1 ) );
 434                                         } else {
 435                                                 $thumb2 = '';
 436                                         }
 437
 438                                         global $wgScript;
 439
 440                                         $formParams = array(
 441                                                 'name' => 'pageselector',
 442                                                 'action' => $wgScript,
 443                                                 'onchange' => 'document.pageselector.submit();',
 444                                         );
 445
 446                                         for ( $i = 1; $i <= $count; $i++ ) {
 447                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 448                                         }
 449                                         $select = Xml::tags( 'select',
 450                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 451                                                 implode( "\n", $options ) );
 452
 453                                         $wgOut->addHTML(
 454                                                 '</td><td><div class="multipageimagenavbox">' .
 455                                                 Xml::openElement( 'form', $formParams ) .
 456                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 457                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 458                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 459                                                 Xml::closeElement( 'form' ) .
 460                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 461                                         );
 462                                 }
 463                         } else {
 464                                 # if direct link is allowed but it's not a renderable image, show an icon.
 465                                 if ( $this->displayImg->isSafeFile() ) {
 466                                         $icon = $this->displayImg->iconThumb();
 467
 468                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 469                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 470                                                 "</div>\n" );
 471                                 }
 472
 473                                 $showLink = true;
 474                         }
 475
 476                         if ( $showLink ) {
 477                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 478                                 $linktext = $filename;
 479                                 if ( isset( $msgbig ) ) {
 480                                         $linktext = wfEscapeWikiText( $msgbig );
 481                                 }
 482                                 $medialink = "[[Media:$filename|$linktext]]";
 483
 484                                 if ( !$this->displayImg->isSafeFile() ) {
 485                                         $warning = wfMsgNoTrans( 'mediawarning' );
 486                                         $wgOut->addWikiText( <<<EOT
 487 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 488 <div class="mediaWarning">$warning</div>
 489 EOT
 490                                                 );
 491                                 } else {
 492                                         $wgOut->addWikiText( <<<EOT
 493 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 494 </div>
 495 EOT
 496                                         );
 497                                 }
 498                         }
 499
 500                         if ( !$this->displayImg->isLocal() ) {
 501                                 $this->printSharedImageText();
 502                         }
 503                 } else {
 504                         # Image does not exist
 505                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 506                                 // Only show an upload link if the user can upload
 507                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 508                                 $nofile = array(
 509                                         'filepage-nofile-link',
 510                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->img->getName() ) )
 511                                 );
 512                         } else {
 513                                 $nofile = 'filepage-nofile';
 514                         }
 515                         // Note, if there is an image description page, but
 516                         // no image, then this setRobotPolicy is overriden
 517                         // by Article::View().
 518                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 519                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 520                         if ( !$this->getID() ) {
 521                                 // If there is no image, no shared image, and no description page,
 522                                 // output a 404, to be consistent with articles.
 523                                 $wgRequest->response()->header( 'HTTP/1.1 404 Not Found' );
 524                         }
 525                 }
 526         }
 527
 528         /**
 529          * Creates an thumbnail of specified size and returns an HTML link to it
 530          * @param array $params Scaler parameters
 531          * @param int $width
 532          * @param int $height
 533          */
 534         private function makeSizeLink( $params, $width, $height ) {
 535                 $params['width'] = $width;
 536                 $params['height'] = $height;
 537                 $thumbnail = $this->displayImg->transform( $params );
 538                 if ( $thumbnail && !$thumbnail->isError() ) {
 539                         return Html::rawElement( 'a', array(
 540                                 'href' => $thumbnail->getUrl(),
 541                                 'class' => 'mw-thumbnail-link'
 542                                 ), wfMessage( 'show-big-image-size' )->numParams(
 543                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 544                                 )->parse() );
 545                 } else {
 546                         return '';
 547                 }
 548         }
 549
 550         /**
 551          * Show a notice that the file is from a shared repository
 552          */
 553         protected function printSharedImageText() {
 554                 global $wgOut;
 555
 556                 $this->loadFile();
 557
 558                 $descUrl = $this->img->getDescriptionUrl();
 559                 $descText = $this->img->getDescriptionText();
 560
 561                 /* Add canonical to head if there is no local page for this shared file */
 562                 if( $descUrl && $this->getID() == 0 ) {
 563                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 564                 }
 565
 566                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 567                 $repo = $this->img->getRepo()->getDisplayName();
 568
 569                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 570                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 571                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 572                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 573                 } else {
 574                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 575                 }
 576
 577                 if ( $descText ) {
 578                         $this->mExtraDescription = $descText;
 579                 }
 580         }
 581
 582         public function getUploadUrl() {
 583                 $this->loadFile();
 584                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 585                 return $uploadTitle->getFullURL( array(
 586                         'wpDestFile' => $this->img->getName(),
 587                         'wpForReUpload' => 1
 588                  ) );
 589         }
 590
 591         /**
 592          * Print out the various links at the bottom of the image page, e.g. reupload,
 593          * external editing (and instructions link) etc.
 594          */
 595         protected function uploadLinksBox() {
 596                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 597
 598                 if ( !$wgEnableUploads ) {
 599                         return;
 600                 }
 601
 602                 $this->loadFile();
 603                 if ( !$this->img->isLocal() ) {
 604                         return;
 605                 }
 606
 607                 $sk = $wgUser->getSkin();
 608
 609                 $wgOut->addHTML( "<br /><ul>\n" );
 610
 611                 # "Upload a new version of this file" link
 612                 if ( UploadBase::userCanReUpload( $wgUser, $this->img->name ) ) {
 613                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 614                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 615                 }
 616
 617                 # External editing link
 618                 if ( $wgUseExternalEditor ) {
 619                         $elink = $sk->link(
 620                                 $this->mTitle,
 621                                 wfMsgHtml( 'edit-externally' ),
 622                                 array(),
 623                                 array(
 624                                         'action' => 'edit',
 625                                         'externaledit' => 'true',
 626                                         'mode' => 'file'
 627                                 ),
 628                                 array( 'known', 'noclasses' )
 629                         );
 630                         $wgOut->addHTML(
 631                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 632                                 wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) .
 633                                 "</small></li>\n"
 634                         );
 635                 }
 636
 637                 $wgOut->addHTML( "</ul>\n" );
 638         }
 639
 640         protected function closeShowImage() { } # For overloading
 641
 642         /**
 643          * If the page we've just displayed is in the "Image" namespace,
 644          * we follow it with an upload history of the image and its usage.
 645          */
 646         protected function imageHistory() {
 647                 global $wgOut;
 648
 649                 $this->loadFile();
 650                 $pager = new ImageHistoryPseudoPager( $this );
 651                 $wgOut->addHTML( $pager->getBody() );
 652                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 653
 654                 $this->img->resetHistory(); // free db resources
 655
 656                 # Exist check because we don't want to show this on pages where an image
 657                 # doesn't exist along with the noimage message, that would suck. -ævar
 658                 if ( $this->img->exists() ) {
 659                         $this->uploadLinksBox();
 660                 }
 661         }
 662
 663         protected function imageLinks() {
 664                 global $wgUser, $wgOut, $wgLang;
 665
 666                 $limit = 100;
 667
 668                 $dbr = wfGetDB( DB_SLAVE );
 669
 670                 $res = $dbr->select(
 671                         array( 'imagelinks', 'page' ),
 672                         array( 'page_namespace', 'page_title' ),
 673                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 674                         __METHOD__,
 675                         array( 'LIMIT' => $limit + 1 )
 676                 );
 677                 $count = $dbr->numRows( $res );
 678                 if ( $count == 0 ) {
 679                         $wgOut->wrapWikiMsg(
 680                                 Html::rawElement( 'div',
 681                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 682                                 'nolinkstoimage'
 683                         );
 684                         return;
 685                 }
 686
 687                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 688                 if ( $count <= $limit - 1 ) {
 689                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 690                 } else {
 691                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 692                         $wgOut->addWikiMsg( 'linkstoimage-more',
 693                                 $wgLang->formatNum( $limit ),
 694                                 $this->mTitle->getPrefixedDBkey()
 695                         );
 696                 }
 697
 698                 $wgOut->addHTML(
 699                         Html::openElement( 'ul',
 700                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 701                 );
 702                 $sk = $wgUser->getSkin();
 703                 $count = 0;
 704                 $elements = array();
 705                 foreach ( $res as $s ) {
 706                         $count++;
 707                         if ( $count <= $limit ) {
 708                                 // We have not yet reached the extra one that tells us there is more to fetch
 709                                 $elements[] =  $s;
 710                         }
 711                 }
 712
 713                 // Sort the list by namespace:title
 714                 usort( $elements, array( $this, 'compare' ) );
 715
 716                 // Create links for every element
 717                 foreach( $elements as $element ) {
 718                         $link = $sk->linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 719                         $wgOut->addHTML( Html::rawElement(
 720                                         'li',
 721                                         array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 722                                         $link
 723                                 ) . "\n"
 724                         );
 725
 726                 };
 727                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 728                 $res->free();
 729
 730                 // Add a links to [[Special:Whatlinkshere]]
 731                 if ( $count > $limit ) {
 732                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 733                 }
 734                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 735         }
 736
 737         protected function imageRedirects() {
 738                 global $wgUser, $wgOut, $wgLang;
 739
 740                 $redirects = $this->getTitle()->getRedirectsHere( NS_FILE );
 741                 if ( count( $redirects ) == 0 ) {
 742                         return;
 743                 }
 744
 745                 $wgOut->addHTML( "<div id='mw-imagepage-section-redirectstofile'>\n" );
 746                 $wgOut->addWikiMsg( 'redirectstofile',
 747                         $wgLang->formatNum( count( $redirects ) )
 748                 );
 749                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 750
 751                 $sk = $wgUser->getSkin();
 752                 foreach ( $redirects as $title ) {
 753                         $link = $sk->link(
 754                                 $title,
 755                                 null,
 756                                 array(),
 757                                 array( 'redirect' => 'no' ),
 758                                 array( 'known', 'noclasses' )
 759                         );
 760                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 761                 }
 762                 $wgOut->addHTML( "</ul></div>\n" );
 763         }
 764
 765         protected function imageDupes() {
 766                 global $wgOut, $wgUser, $wgLang;
 767
 768                 $this->loadFile();
 769
 770                 $dupes = $this->getDuplicates();
 771                 if ( count( $dupes ) == 0 ) {
 772                         return;
 773                 }
 774
 775                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 776                 $wgOut->addWikiMsg( 'duplicatesoffile',
 777                         $wgLang->formatNum( count( $dupes ) ), $this->mTitle->getDBkey()
 778                 );
 779                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 780
 781                 $sk = $wgUser->getSkin();
 782                 foreach ( $dupes as $file ) {
 783                         $fromSrc = '';
 784                         if ( $file->isLocal() ) {
 785                                 $link = $sk->link(
 786                                         $file->getTitle(),
 787                                         null,
 788                                         array(),
 789                                         array(),
 790                                         array( 'known', 'noclasses' )
 791                                 );
 792                         } else {
 793                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 794                                         $file->getTitle()->getPrefixedText() );
 795                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 796                         }
 797                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 798                 }
 799                 $wgOut->addHTML( "</ul></div>\n" );
 800         }
 801
 802         /**
 803          * Delete the file, or an earlier version of it
 804          */
 805         public function delete() {
 806                 global $wgUploadMaintenance;
 807                 if ( $wgUploadMaintenance && $this->mTitle && $this->mTitle->getNamespace() == NS_FILE ) {
 808                         global $wgOut;
 809                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
 810                         return;
 811                 }
 812
 813                 $this->loadFile();
 814                 if ( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 815                         // Standard article deletion
 816                         parent::delete();
 817                         return;
 818                 }
 819                 $deleter = new FileDeleteForm( $this->img );
 820                 $deleter->execute();
 821         }
 822
 823         /**
 824          * Revert the file to an earlier version
 825          */
 826         public function revert() {
 827                 $this->loadFile();
 828                 $reverter = new FileRevertForm( $this->img );
 829                 $reverter->execute();
 830         }
 831
 832         /**
 833          * Override handling of action=purge
 834          */
 835         public function doPurge() {
 836                 $this->loadFile();
 837                 if ( $this->img->exists() ) {
 838                         wfDebug( 'ImagePage::doPurge purging ' . $this->img->getName() . "\n" );
 839                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 840                         $update->doUpdate();
 841                         $this->img->upgradeRow();
 842                         $this->img->purgeCache();
 843                 } else {
 844                         wfDebug( 'ImagePage::doPurge no image for ' . $this->img->getName() . "; limiting purge to cache only\n" );
 845                         // even if the file supposedly doesn't exist, force any cached information
 846                         // to be updated (in case the cached information is wrong)
 847                         $this->img->purgeCache();
 848                 }
 849                 parent::doPurge();
 850         }
 851
 852         /**
 853          * Display an error with a wikitext description
 854          */
 855         function showError( $description ) {
 856                 global $wgOut;
 857                 $wgOut->setPageTitle( wfMsg( 'internalerror' ) );
 858                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 859                 $wgOut->setArticleRelated( false );
 860                 $wgOut->enableClientCache( false );
 861                 $wgOut->addWikiText( $description );
 862         }
 863
 864         /**
 865          * Callback for usort() to do link sorts by (namespace, title)
 866          * Function copied from Title::compare()
 867          *
 868          * @param $a object page to compare with
 869          * @param $b object page to compare with
 870          * @return Integer: result of string comparison, or namespace comparison
 871          */
 872         protected function compare( $a, $b ) {
 873                 if ( $a->page_namespace == $b->page_namespace ) {
 874                         return strcmp( $a->page_title, $b->page_title );
 875                 } else {
 876                         return $a->page_namespace - $b->page_namespace;
 877                 }
 878         }
 879 }
 880
 881 /**
 882  * Builds the image revision log shown on image pages
 883  *
 884  * @ingroup Media
 885  */
 886 class ImageHistoryList {
 887
 888         /**
 889          * @var Title
 890          */
 891         protected $title;
 892
 893         /**
 894          * @var File
 895          */
 896         protected $img;
 897
 898         /**
 899          * @var ImagePage
 900          */
 901         protected $imagePage;
 902
 903         /**
 904          * @var Skin
 905          */
 906         protected $skin;
 907
 908         protected $repo, $showThumb;
 909         protected $preventClickjacking = false;
 910
 911         /**
 912          * @param ImagePage $imagePage
 913          */
 914         public function __construct( $imagePage ) {
 915                 global $wgUser, $wgShowArchiveThumbnails;
 916                 $this->skin = $wgUser->getSkin();
 917                 $this->current = $imagePage->getFile();
 918                 $this->img = $imagePage->getDisplayedFile();
 919                 $this->title = $imagePage->getTitle();
 920                 $this->imagePage = $imagePage;
 921                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 922         }
 923
 924         public function getImagePage() {
 925                 return $this->imagePage;
 926         }
 927
 928         public function getSkin() {
 929                 return $this->skin;
 930         }
 931
 932         public function getFile() {
 933                 return $this->img;
 934         }
 935
 936         public function beginImageHistoryList( $navLinks = '' ) {
 937                 global $wgOut, $wgUser;
 938                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 939                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 940                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 941                         . $navLinks . "\n"
 942                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 943                         . '<tr><td></td>'
 944                         . ( $this->current->isLocal() && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 945                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 946                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 947                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 948                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 949                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 950                         . "</tr>\n";
 951         }
 952
 953         public function endImageHistoryList( $navLinks = '' ) {
 954                 return "</table>\n$navLinks\n</div>\n";
 955         }
 956
 957         /**
 958          * @param $iscur
 959          * @param $file File
 960          * @return string
 961          */
 962         public function imageHistoryLine( $iscur, $file ) {
 963                 global $wgUser, $wgLang;
 964
 965                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 966                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 967                 $user = $file->getUser( 'id' );
 968                 $usertext = $file->getUser( 'text' );
 969                 $description = $file->getDescription();
 970
 971                 $local = $this->current->isLocal();
 972                 $row = $selected = '';
 973
 974                 // Deletion link
 975                 if ( $local && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
 976                         $row .= '<td>';
 977                         # Link to remove from history
 978                         if ( $wgUser->isAllowed( 'delete' ) ) {
 979                                 $q = array( 'action' => 'delete' );
 980                                 if ( !$iscur ) {
 981                                         $q['oldimage'] = $img;
 982                                 }
 983                                 $row .= $this->skin->link(
 984                                         $this->title,
 985                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 986                                         array(), $q, array( 'known' )
 987                                 );
 988                         }
 989                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 990                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 991                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 992                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 993                                         $row .= '<br />';
 994                                 }
 995                                 // If file is top revision or locked from this user, don't link
 996                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 997                                         $del = $this->skin->revDeleteLinkDisabled( $canHide );
 998                                 } else {
 999                                         list( $ts, $name ) = explode( '!', $img, 2 );
1000                                         $query = array(
1001                                                 'type'   => 'oldimage',
1002                                                 'target' => $this->title->getPrefixedText(),
1003                                                 'ids'    => $ts,
1004                                         );
1005                                         $del = $this->skin->revDeleteLink( $query,
1006                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1007                                 }
1008                                 $row .= $del;
1009                         }
1010                         $row .= '</td>';
1011                 }
1012
1013                 // Reversion link/current indicator
1014                 $row .= '<td>';
1015                 if ( $iscur ) {
1016                         $row .= wfMsgHtml( 'filehist-current' );
1017                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
1018                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1019                                 $row .= wfMsgHtml( 'filehist-revert' );
1020                         } else {
1021                                 $row .= $this->skin->link(
1022                                         $this->title,
1023                                         wfMsgHtml( 'filehist-revert' ),
1024                                         array(),
1025                                         array(
1026                                                 'action' => 'revert',
1027                                                 'oldimage' => $img,
1028                                                 'wpEditToken' => $wgUser->editToken( $img )
1029                                         ),
1030                                         array( 'known', 'noclasses' )
1031                                 );
1032                         }
1033                 }
1034                 $row .= '</td>';
1035
1036                 // Date/time and image link
1037                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1038                         $selected = "class='filehistory-selected'";
1039                 }
1040                 $row .= "<td $selected style='white-space: nowrap;'>";
1041                 if ( !$file->userCan( File::DELETED_FILE ) ) {
1042                         # Don't link to unviewable files
1043                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
1044                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1045                         if ( $local ) {
1046                                 $this->preventClickjacking();
1047                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1048                                 # Make a link to review the image
1049                                 $url = $this->skin->link(
1050                                         $revdel,
1051                                         $wgLang->timeAndDate( $timestamp, true ),
1052                                         array(),
1053                                         array(
1054                                                 'target' => $this->title->getPrefixedText(),
1055                                                 'file' => $img,
1056                                                 'token' => $wgUser->editToken( $img )
1057                                         ),
1058                                         array( 'known', 'noclasses' )
1059                                 );
1060                         } else {
1061                                 $url = $wgLang->timeAndDate( $timestamp, true );
1062                         }
1063                         $row .= '<span class="history-deleted">' . $url . '</span>';
1064                 } else {
1065                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1066                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
1067                 }
1068                 $row .= "</td>";
1069
1070                 // Thumbnail
1071                 if ( $this->showThumb ) {
1072                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1073                 }
1074
1075                 // Image dimensions + size
1076                 $row .= '<td>';
1077                 $row .= htmlspecialchars( $file->getDimensionsString() );
1078                 $row .= ' <span style="white-space: nowrap;">(' . $this->skin->formatSize( $file->getSize() ) . ')</span>';
1079                 $row .= '</td>';
1080
1081                 // Uploading user
1082                 $row .= '<td>';
1083                 // Hide deleted usernames
1084                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1085                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1086                 } else {
1087                         if ( $local ) {
1088                                 $row .= $this->skin->userLink( $user, $usertext ) . ' <span style="white-space: nowrap;">' .
1089                                 $this->skin->userToolLinks( $user, $usertext ) . '</span>';
1090                         } else {
1091                                 $row .= htmlspecialchars( $usertext );
1092                         }
1093                 }
1094                 $row .= '</td><td>';
1095
1096                 // Don't show deleted descriptions
1097                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1098                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
1099                 } else {
1100                         $row .= $this->skin->commentBlock( $description, $this->title );
1101                 }
1102                 $row .= '</td>';
1103
1104                 $rowClass = null;
1105                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1106                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1107
1108                 return "<tr{$classAttr}>{$row}</tr>\n";
1109         }
1110
1111         /**
1112          * @param $file File
1113          * @return string
1114          */
1115         protected function getThumbForLine( $file ) {
1116                 global $wgLang;
1117
1118                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1119                         $params = array(
1120                                 'width' => '120',
1121                                 'height' => '120',
1122                         );
1123                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1124
1125                         $thumbnail = $file->transform( $params );
1126                         $options = array(
1127                                 'alt' => wfMsg( 'filehist-thumbtext',
1128                                         $wgLang->timeAndDate( $timestamp, true ),
1129                                         $wgLang->date( $timestamp, true ),
1130                                         $wgLang->time( $timestamp, true ) ),
1131                                 'file-link' => true,
1132                         );
1133
1134                         if ( !$thumbnail ) {
1135                                 return wfMsgHtml( 'filehist-nothumb' );
1136                         }
1137
1138                         return $thumbnail->toHtml( $options );
1139                 } else {
1140                         return wfMsgHtml( 'filehist-nothumb' );
1141                 }
1142         }
1143
1144         protected function preventClickjacking( $enable = true ) {
1145                 $this->preventClickjacking = $enable;
1146         }
1147
1148         public function getPreventClickjacking() {
1149                 return $this->preventClickjacking;
1150         }
1151 }
1152
1153 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1154         protected $preventClickjacking = false;
1155
1156         /**
1157          * @var File
1158          */
1159         protected $mImg;
1160
1161         /**
1162          * @var Title
1163          */
1164         protected $mTitle;
1165
1166         /**
1167          * @param ImagePage $imagePage
1168          */
1169         function __construct( $imagePage ) {
1170                 parent::__construct();
1171                 $this->mImagePage = $imagePage;
1172                 $this->mTitle = clone ( $imagePage->getTitle() );
1173                 $this->mTitle->setFragment( '#filehistory' );
1174                 $this->mImg = null;
1175                 $this->mHist = array();
1176                 $this->mRange = array( 0, 0 ); // display range
1177         }
1178
1179         function getTitle() {
1180                 return $this->mTitle;
1181         }
1182
1183         function getQueryInfo() {
1184                 return false;
1185         }
1186
1187         function getIndexField() {
1188                 return '';
1189         }
1190
1191         function formatRow( $row ) {
1192                 return '';
1193         }
1194
1195         function getBody() {
1196                 $s = '';
1197                 $this->doQuery();
1198                 if ( count( $this->mHist ) ) {
1199                         $list = new ImageHistoryList( $this->mImagePage );
1200                         # Generate prev/next links
1201                         $navLink = $this->getNavigationBar();
1202                         $s = $list->beginImageHistoryList( $navLink );
1203                         // Skip rows there just for paging links
1204                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1205                                 $file = $this->mHist[$i];
1206                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1207                         }
1208                         $s .= $list->endImageHistoryList( $navLink );
1209
1210                         if ( $list->getPreventClickjacking() ) {
1211                                 $this->preventClickjacking();
1212                         }
1213                 }
1214                 return $s;
1215         }
1216
1217         function doQuery() {
1218                 if ( $this->mQueryDone ) {
1219                         return;
1220                 }
1221                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1222                 if ( !$this->mImg->exists() ) {
1223                         return;
1224                 }
1225                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1226                 if ( $this->mIsBackwards ) {
1227                         // Fetch the file history
1228                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1229                         // The current rev may not meet the offset/limit
1230                         $numRows = count( $this->mHist );
1231                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1232                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1233                         }
1234                 } else {
1235                         // The current rev may not meet the offset
1236                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1237                                 $this->mHist[] = $this->mImg;
1238                         }
1239                         // Old image versions (fetch extra row for nav links)
1240                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1241                         // Fetch the file history
1242                         $this->mHist = array_merge( $this->mHist,
1243                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1244                 }
1245                 $numRows = count( $this->mHist ); // Total number of query results
1246                 if ( $numRows ) {
1247                         # Index value of top item in the list
1248                         $firstIndex = $this->mIsBackwards ?
1249                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1250                         # Discard the extra result row if there is one
1251                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1252                                 if ( $this->mIsBackwards ) {
1253                                         # Index value of item past the index
1254                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1255                                         # Index value of bottom item in the list
1256                                         $lastIndex = $this->mHist[1]->getTimestamp();
1257                                         # Display range
1258                                         $this->mRange = array( 1, $numRows - 1 );
1259                                 } else {
1260                                         # Index value of item past the index
1261                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1262                                         # Index value of bottom item in the list
1263                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1264                                         # Display range
1265                                         $this->mRange = array( 0, $numRows - 2 );
1266                                 }
1267                         } else {
1268                                 # Setting indexes to an empty string means that they will be
1269                                 # omitted if they would otherwise appear in URLs. It just so
1270                                 # happens that this  is the right thing to do in the standard
1271                                 # UI, in all the relevant cases.
1272                                 $this->mPastTheEndIndex = '';
1273                                 # Index value of bottom item in the list
1274                                 $lastIndex = $this->mIsBackwards ?
1275                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1276                                 # Display range
1277                                 $this->mRange = array( 0, $numRows - 1 );
1278                         }
1279                 } else {
1280                         $firstIndex = '';
1281                         $lastIndex = '';
1282                         $this->mPastTheEndIndex = '';
1283                 }
1284                 if ( $this->mIsBackwards ) {
1285                         $this->mIsFirst = ( $numRows < $queryLimit );
1286                         $this->mIsLast = ( $this->mOffset == '' );
1287                         $this->mLastShown = $firstIndex;
1288                         $this->mFirstShown = $lastIndex;
1289                 } else {
1290                         $this->mIsFirst = ( $this->mOffset == '' );
1291                         $this->mIsLast = ( $numRows < $queryLimit );
1292                         $this->mLastShown = $lastIndex;
1293                         $this->mFirstShown = $firstIndex;
1294                 }
1295                 $this->mQueryDone = true;
1296         }
1297
1298         protected function preventClickjacking( $enable = true ) {
1299                 $this->preventClickjacking = $enable;
1300         }
1301
1302         public function getPreventClickjacking() {
1303                 return $this->preventClickjacking;
1304         }
1305
1306 }