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 */ var $img;
  14         /**
  15          * @var File
  16          */
  17         /* private */ var $displayImg;
  18         /* private */ var $repo;
  19         /* private */ var $fileLoaded;
  20
  21         var $mExtraDescription = false;
  22         var $dupes;
  23
  24         function __construct( $title ) {
  25                 parent::__construct( $title );
  26                 $this->dupes = null;
  27                 $this->repo = null;
  28         }
  29
  30         /**
  31          * @param $file File:
  32          * @return void
  33          */
  34         public function setFile( $file ) {
  35                 $this->displayImg = $file;
  36                 $this->img = $file;
  37                 $this->fileLoaded = true;
  38         }
  39
  40         protected function loadFile() {
  41                 if ( $this->fileLoaded ) {
  42                         return true;
  43                 }
  44                 $this->fileLoaded = true;
  45
  46                 $this->displayImg = $this->img = false;
  47                 wfRunHooks( 'ImagePageFindFile', array( $this, &$this->img, &$this->displayImg ) );
  48                 if ( !$this->img ) {
  49                         $this->img = wfFindFile( $this->mTitle );
  50                         if ( !$this->img ) {
  51                                 $this->img = wfLocalFile( $this->mTitle );
  52                         }
  53                 }
  54                 if ( !$this->displayImg ) {
  55                         $this->displayImg = $this->img;
  56                 }
  57                 $this->repo = $this->img->getRepo();
  58         }
  59
  60         /**
  61          * Handler for action=render
  62          * Include body text only; none of the image extras
  63          */
  64         public function render() {
  65                 global $wgOut;
  66                 $wgOut->setArticleBodyOnly( true );
  67                 parent::view();
  68         }
  69
  70         public function view() {
  71                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  72
  73                 $diff = $wgRequest->getVal( 'diff' );
  74                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  75
  76                 if ( $this->mTitle->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  77                         return parent::view();
  78                 }
  79
  80                 $this->loadFile();
  81
  82                 if ( $this->mTitle->getNamespace() == NS_FILE && $this->img->getRedirected() ) {
  83                         if ( $this->mTitle->getDBkey() == $this->img->getName() || isset( $diff ) ) {
  84                                 // mTitle is the same as the redirect target so ask Article
  85                                 // to perform the redirect for us.
  86                                 $wgRequest->setVal( 'diffonly', 'true' );
  87                                 return parent::view();
  88                         } else {
  89                                 // mTitle is not the same as the redirect target so it is
  90                                 // probably the redirect page itself. Fake the redirect symbol
  91                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  92                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->img->getName() ),
  93                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
  94                                 $this->viewUpdates();
  95                                 return;
  96                         }
  97                 }
  98
  99                 $this->showRedirectedFromHeader();
 100
 101                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 102                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
 103                         $formattedMetadata = $this->displayImg->formatMetadata();
 104                         $showmeta = $formattedMetadata !== false;
 105                 } else {
 106                         $showmeta = false;
 107                 }
 108
 109                 if ( !$diff && $this->displayImg->exists() ) {
 110                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 111                 }
 112
 113                 if ( !$diff ) {
 114                         $this->openShowImage();
 115                 }
 116
 117                 # No need to display noarticletext, we use our own message, output in openShowImage()
 118                 if ( $this->getID() ) {
 119                         parent::view();
 120                 } else {
 121                         # Just need to set the right headers
 122                         $wgOut->setArticleFlag( true );
 123                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 124                         $this->viewUpdates();
 125                 }
 126
 127                 # Show shared description, if needed
 128                 if ( $this->mExtraDescription ) {
 129                         $fol = wfMessage( 'shareddescriptionfollows' );
 130                         if ( !$fol->isDisabled() ) {
 131                                 $wgOut->addWikiText( $fol->plain() );
 132                         }
 133                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 134                 }
 135
 136                 $this->closeShowImage();
 137                 $this->imageHistory();
 138                 // TODO: Cleanup the following
 139
 140                 $wgOut->addHTML( Xml::element( 'h2',
 141                         array( 'id' => 'filelinks' ),
 142                         wfMsg( 'imagelinks' ) ) . "\n" );
 143                 $this->imageDupes();
 144                 # TODO! FIXME! For some freaky reason, we can't redirect to foreign images.
 145                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 146                 $this->imageRedirects();
 147                 $this->imageLinks();
 148
 149                 # Allow extensions to add something after the image links
 150                 $html = '';
 151                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 152                 if ( $html ) {
 153                         $wgOut->addHTML( $html );
 154                 }
 155
 156                 if ( $showmeta ) {
 157                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 158                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 159                         $wgOut->addModules( array( 'mediawiki.legacy.metadata' ) );
 160                 }
 161
 162                 $css = $this->repo->getDescriptionStylesheetUrl();
 163                 if ( $css ) {
 164                         $wgOut->addStyle( $css );
 165                 }
 166         }
 167
 168         public function getRedirectTarget() {
 169                 $this->loadFile();
 170                 if ( $this->img->isLocal() ) {
 171                         return parent::getRedirectTarget();
 172                 }
 173                 // Foreign image page
 174                 $from = $this->img->getRedirected();
 175                 $to = $this->img->getName();
 176                 if ( $from == $to ) {
 177                         return null;
 178                 }
 179                 return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
 180         }
 181
 182         public function followRedirect() {
 183                 $this->loadFile();
 184                 if ( $this->img->isLocal() ) {
 185                         return parent::followRedirect();
 186                 }
 187                 $from = $this->img->getRedirected();
 188                 $to = $this->img->getName();
 189                 if ( $from == $to ) {
 190                         return false;
 191                 }
 192                 return Title::makeTitle( NS_FILE, $to );
 193         }
 194
 195         public function isRedirect( $text = false ) {
 196                 $this->loadFile();
 197                 if ( $this->img->isLocal() ) {
 198                         return parent::isRedirect( $text );
 199                 }
 200
 201                 return (bool)$this->img->getRedirected();
 202         }
 203
 204         public function isLocal() {
 205                 $this->loadFile();
 206                 return $this->img->isLocal();
 207         }
 208
 209         public function getFile() {
 210                 $this->loadFile();
 211                 return $this->img;
 212         }
 213
 214         public function getDisplayedFile() {
 215                 $this->loadFile();
 216                 return $this->displayImg;
 217         }
 218
 219         public function getDuplicates() {
 220                 $this->loadFile();
 221                 if ( !is_null( $this->dupes ) ) {
 222                         return $this->dupes;
 223                 }
 224                 $hash = $this->img->getSha1();
 225                 if ( !( $hash ) ) {
 226                         return $this->dupes = array();
 227                 }
 228                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 229                 // Remove duplicates with self and non matching file sizes
 230                 $self = $this->img->getRepoName() . ':' . $this->img->getName();
 231                 $size = $this->img->getSize();
 232                 foreach ( $dupes as $index => $file ) {
 233                         $key = $file->getRepoName() . ':' . $file->getName();
 234                         if ( $key == $self ) {
 235                                 unset( $dupes[$index] );
 236                         }
 237                         if ( $file->getSize() != $size ) {
 238                                 unset( $dupes[$index] );
 239                         }
 240                 }
 241                 return $this->dupes = $dupes;
 242         }
 243
 244         /**
 245          * Create the TOC
 246          *
 247          * @param $metadata Boolean: whether or not to show the metadata link
 248          * @return String
 249          */
 250         protected function showTOC( $metadata ) {
 251                 $r = array(
 252                         '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 253                         '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 254                         '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 255                 );
 256                 if ( $metadata ) {
 257                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 258                 }
 259
 260                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 261
 262                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 263         }
 264
 265         /**
 266          * Make a table with metadata to be shown in the output page.
 267          *
 268          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 269          *
 270          * @param $metadata Array: the array containing the EXIF data
 271          * @return String
 272          */
 273         protected function makeMetadataTable( $metadata ) {
 274                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 275                 $r .= wfMsgNoTrans( 'metadata-help' );
 276                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 277                 foreach ( $metadata as $type => $stuff ) {
 278                         foreach ( $stuff as $v ) {
 279                                 # FIXME, why is this using escapeId for a class?!
 280                                 $class = Sanitizer::escapeId( $v['id'] );
 281                                 if ( $type == 'collapsed' ) {
 282                                         $class .= ' collapsable';
 283                                 }
 284                                 $r .= "<tr class=\"$class\">\n";
 285                                 $r .= "<th>{$v['name']}</th>\n";
 286                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 287                         }
 288                 }
 289                 $r .= "</table>\n</div>\n";
 290                 return $r;
 291         }
 292
 293         /**
 294          * Overloading Article's getContent method.
 295          *
 296          * Omit noarticletext if sharedupload; text will be fetched from the
 297          * shared upload server if possible.
 298          */
 299         public function getContent() {
 300                 $this->loadFile();
 301                 if ( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 302                         return '';
 303                 }
 304                 return parent::getContent();
 305         }
 306
 307         protected function openShowImage() {
 308                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 309                         $wgLang, $wgContLang, $wgEnableUploads;
 310
 311                 $this->loadFile();
 312
 313                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 314                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 315                         $sizeSel = User::getDefaultOption( 'imagesize' );
 316
 317                         // The user offset might still be incorrect, specially if
 318                         // $wgImageLimits got changed (see bug #8858).
 319                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 320                                 // Default to the first offset in $wgImageLimits
 321                                 $sizeSel = 0;
 322                         }
 323                 }
 324                 $max = $wgImageLimits[$sizeSel];
 325                 $maxWidth = $max[0];
 326                 $maxHeight = $max[1];
 327                 $sk = $wgUser->getSkin();
 328                 $dirmark = $wgContLang->getDirMark();
 329
 330                 if ( $this->displayImg->exists() ) {
 331                         # image
 332                         $page = $wgRequest->getIntOrNull( 'page' );
 333                         if ( is_null( $page ) ) {
 334                                 $params = array();
 335                                 $page = 1;
 336                         } else {
 337                                 $params = array( 'page' => $page );
 338                         }
 339                         $width_orig = $this->displayImg->getWidth( $page );
 340                         $width = $width_orig;
 341                         $height_orig = $this->displayImg->getHeight( $page );
 342                         $height = $height_orig;
 343
 344                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 345
 346                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 347
 348                         if ( $this->displayImg->allowInlineDisplay() ) {
 349                                 # image
 350
 351                                 # "Download high res version" link below the image
 352                                 # $msgsize = wfMsgHtml( 'file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 353                                 # We'll show a thumbnail of this image
 354                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 355                                         # Calculate the thumbnail size.
 356                                         # First case, the limiting factor is the width, not the height.
 357                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 358                                                 $height = round( $height * $maxWidth / $width );
 359                                                 $width = $maxWidth;
 360                                                 # Note that $height <= $maxHeight now.
 361                                         } else {
 362                                                 $newwidth = floor( $width * $maxHeight / $height );
 363                                                 $height = round( $height * $newwidth / $width );
 364                                                 $width = $newwidth;
 365                                                 # Note that $height <= $maxHeight now, but might not be identical
 366                                                 # because of rounding.
 367                                         }
 368                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 369                                         $otherSizes = array();
 370                                         foreach ( $wgImageLimits as $size ) {
 371                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig &&
 372                                                                 $size[0] != $width && $size[1] != $height ) {
 373                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 374                                                 }
 375                                         }
 376                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 377                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 378                                                 parse() . ' ' .
 379                                                 wfMessage( 'show-big-image-other' )->
 380                                                 rawParams( $wgLang->pipeList( $otherSizes ) )->parse();
 381                                 } else {
 382                                         # Image is small enough to show full size on image page
 383                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 384                                 }
 385
 386                                 $params['width'] = $width;
 387                                 $params['height'] = $height;
 388                                 $thumbnail = $this->displayImg->transform( $params );
 389
 390                                 $showLink = true;
 391                                 $anchorclose = '<br />' . $msgsmall;
 392
 393                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 394                                 if ( $isMulti ) {
 395                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 396                                 }
 397
 398                                 if ( $thumbnail ) {
 399                                         $options = array(
 400                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 401                                                 'file-link' => true,
 402                                         );
 403                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 404                                                 $thumbnail->toHtml( $options ) .
 405                                                 $anchorclose . "</div>\n" );
 406                                 }
 407
 408                                 if ( $isMulti ) {
 409                                         $count = $this->displayImg->pageCount();
 410
 411                                         if ( $page > 1 ) {
 412                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 413                                                 $link = $sk->link(
 414                                                         $this->mTitle,
 415                                                         $label,
 416                                                         array(),
 417                                                         array( 'page' => $page - 1 ),
 418                                                         array( 'known', 'noclasses' )
 419                                                 );
 420                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 421                                                         array( 'page' => $page - 1 ) );
 422                                         } else {
 423                                                 $thumb1 = '';
 424                                         }
 425
 426                                         if ( $page < $count ) {
 427                                                 $label = wfMsg( 'imgmultipagenext' );
 428                                                 $link = $sk->link(
 429                                                         $this->mTitle,
 430                                                         $label,
 431                                                         array(),
 432                                                         array( 'page' => $page + 1 ),
 433                                                         array( 'known', 'noclasses' )
 434                                                 );
 435                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 436                                                         array( 'page' => $page + 1 ) );
 437                                         } else {
 438                                                 $thumb2 = '';
 439                                         }
 440
 441                                         global $wgScript;
 442
 443                                         $formParams = array(
 444                                                 'name' => 'pageselector',
 445                                                 'action' => $wgScript,
 446                                                 'onchange' => 'document.pageselector.submit();',
 447                                         );
 448
 449                                         for ( $i = 1; $i <= $count; $i++ ) {
 450                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 451                                         }
 452                                         $select = Xml::tags( 'select',
 453                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 454                                                 implode( "\n", $options ) );
 455
 456                                         $wgOut->addHTML(
 457                                                 '</td><td><div class="multipageimagenavbox">' .
 458                                                 Xml::openElement( 'form', $formParams ) .
 459                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 460                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 461                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 462                                                 Xml::closeElement( 'form' ) .
 463                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 464                                         );
 465                                 }
 466                         } else {
 467                                 # if direct link is allowed but it's not a renderable image, show an icon.
 468                                 if ( $this->displayImg->isSafeFile() ) {
 469                                         $icon = $this->displayImg->iconThumb();
 470
 471                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 472                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 473                                                 "</div>\n" );
 474                                 }
 475
 476                                 $showLink = true;
 477                         }
 478
 479                         if ( $showLink ) {
 480                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 481                                 $linktext = $filename;
 482                                 if ( isset( $msgbig ) ) {
 483                                         $linktext = wfEscapeWikiText( $msgbig );
 484                                 }
 485                                 $medialink = "[[Media:$filename|$linktext]]";
 486
 487                                 if ( !$this->displayImg->isSafeFile() ) {
 488                                         $warning = wfMsgNoTrans( 'mediawarning' );
 489                                         $wgOut->addWikiText( <<<EOT
 490 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 491 <div class="mediaWarning">$warning</div>
 492 EOT
 493                                                 );
 494                                 } else {
 495                                         $wgOut->addWikiText( <<<EOT
 496 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 497 </div>
 498 EOT
 499                                         );
 500                                 }
 501                         }
 502
 503                         if ( !$this->displayImg->isLocal() ) {
 504                                 $this->printSharedImageText();
 505                         }
 506                 } else {
 507                         # Image does not exist
 508                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 509                                 // Only show an upload link if the user can upload
 510                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 511                                 $nofile = array(
 512                                         'filepage-nofile-link',
 513                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->img->getName() ) )
 514                                 );
 515                         } else {
 516                                 $nofile = 'filepage-nofile';
 517                         }
 518                         // Note, if there is an image description page, but
 519                         // no image, then this setRobotPolicy is overriden
 520                         // by Article::View().
 521                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 522                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 523                         if ( !$this->getID() ) {
 524                                 // If there is no image, no shared image, and no description page,
 525                                 // output a 404, to be consistent with articles.
 526                                 $wgRequest->response()->header( 'HTTP/1.1 404 Not Found' );
 527                         }
 528                 }
 529         }
 530
 531         /**
 532          * Creates an thumbnail of specified size and returns an HTML link to it
 533          * @param array $params Scaler parameters
 534          * @param int $width
 535          * @param int $height
 536          */
 537         private function makeSizeLink( $params, $width, $height ) {
 538                 global $wgLang;
 539
 540                 $params['width'] = $width;
 541                 $params['height'] = $height;
 542                 $thumbnail = $this->displayImg->transform( $params );
 543                 if ( $thumbnail && !$thumbnail->isError() ) {
 544                         return Html::rawElement( 'a', array(
 545                                 'href' => $thumbnail->getUrl(),
 546                                 'class' => 'mw-thumbnail-link'
 547                                 ), wfMessage( 'show-big-image-size' )->numParams(
 548                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 549                                 )->parse() );
 550                 } else {
 551                         return '';
 552                 }
 553         }
 554
 555         /**
 556          * Show a notice that the file is from a shared repository
 557          */
 558         protected function printSharedImageText() {
 559                 global $wgOut;
 560
 561                 $this->loadFile();
 562
 563                 $descUrl = $this->img->getDescriptionUrl();
 564                 $descText = $this->img->getDescriptionText();
 565
 566                 /* Add canonical to head if there is no local page for this shared file */
 567                 if( $descUrl && $this->getID() == 0 ) {
 568                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 569                 }
 570
 571                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 572                 $repo = $this->img->getRepo()->getDisplayName();
 573
 574                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 575                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 576                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 577                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 578                 } else {
 579                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 580                 }
 581
 582                 if ( $descText ) {
 583                         $this->mExtraDescription = $descText;
 584                 }
 585         }
 586
 587         public function getUploadUrl() {
 588                 $this->loadFile();
 589                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 590                 return $uploadTitle->getFullURL( array(
 591                         'wpDestFile' => $this->img->getName(),
 592                         'wpForReUpload' => 1
 593                  ) );
 594         }
 595
 596         /**
 597          * Print out the various links at the bottom of the image page, e.g. reupload,
 598          * external editing (and instructions link) etc.
 599          */
 600         protected function uploadLinksBox() {
 601                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 602
 603                 if ( !$wgEnableUploads ) {
 604                         return;
 605                 }
 606
 607                 $this->loadFile();
 608                 if ( !$this->img->isLocal() ) {
 609                         return;
 610                 }
 611
 612                 $sk = $wgUser->getSkin();
 613
 614                 $wgOut->addHTML( "<br /><ul>\n" );
 615
 616                 # "Upload a new version of this file" link
 617                 if ( UploadBase::userCanReUpload( $wgUser, $this->img->name ) ) {
 618                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 619                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 620                 }
 621
 622                 # External editing link
 623                 if ( $wgUseExternalEditor ) {
 624                         $elink = $sk->link(
 625                                 $this->mTitle,
 626                                 wfMsgHtml( 'edit-externally' ),
 627                                 array(),
 628                                 array(
 629                                         'action' => 'edit',
 630                                         'externaledit' => 'true',
 631                                         'mode' => 'file'
 632                                 ),
 633                                 array( 'known', 'noclasses' )
 634                         );
 635                         $wgOut->addHTML(
 636                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 637                                 wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) .
 638                                 "</small></li>\n"
 639                         );
 640                 }
 641
 642                 $wgOut->addHTML( "</ul>\n" );
 643         }
 644
 645         protected function closeShowImage() { } # For overloading
 646
 647         /**
 648          * If the page we've just displayed is in the "Image" namespace,
 649          * we follow it with an upload history of the image and its usage.
 650          */
 651         protected function imageHistory() {
 652                 global $wgOut;
 653
 654                 $this->loadFile();
 655                 $pager = new ImageHistoryPseudoPager( $this );
 656                 $wgOut->addHTML( $pager->getBody() );
 657                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 658
 659                 $this->img->resetHistory(); // free db resources
 660
 661                 # Exist check because we don't want to show this on pages where an image
 662                 # doesn't exist along with the noimage message, that would suck. -ævar
 663                 if ( $this->img->exists() ) {
 664                         $this->uploadLinksBox();
 665                 }
 666         }
 667
 668         protected function imageLinks() {
 669                 global $wgUser, $wgOut, $wgLang;
 670
 671                 $limit = 100;
 672
 673                 $dbr = wfGetDB( DB_SLAVE );
 674
 675                 $res = $dbr->select(
 676                         array( 'imagelinks', 'page' ),
 677                         array( 'page_namespace', 'page_title' ),
 678                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 679                         __METHOD__,
 680                         array( 'LIMIT' => $limit + 1 )
 681                 );
 682                 $count = $dbr->numRows( $res );
 683                 if ( $count == 0 ) {
 684                         $wgOut->wrapWikiMsg(
 685                                 Html::rawElement( 'div',
 686                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 687                                 'nolinkstoimage'
 688                         );
 689                         return;
 690                 }
 691
 692                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 693                 if ( $count <= $limit - 1 ) {
 694                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 695                 } else {
 696                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 697                         $wgOut->addWikiMsg( 'linkstoimage-more',
 698                                 $wgLang->formatNum( $limit ),
 699                                 $this->mTitle->getPrefixedDBkey()
 700                         );
 701                 }
 702
 703                 $wgOut->addHTML(
 704                         Html::openElement( 'ul',
 705                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 706                 );
 707                 $sk = $wgUser->getSkin();
 708                 $count = 0;
 709                 $elements = array();
 710                 foreach ( $res as $s ) {
 711                         $count++;
 712                         if ( $count <= $limit ) {
 713                                 // We have not yet reached the extra one that tells us there is more to fetch
 714                                 $elements[] =  $s;
 715                         }
 716                 }
 717
 718                 // Sort the list by namespace:title
 719                 usort( $elements, array( $this, 'compare' ) );
 720
 721                 // Create links for every element
 722                 foreach( $elements as $element ) {
 723                         $link = $sk->linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 724                         $wgOut->addHTML( Html::rawElement(
 725                                         'li',
 726                                         array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 727                                         $link
 728                                 ) . "\n"
 729                         );
 730
 731                 };
 732                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 733                 $res->free();
 734
 735                 // Add a links to [[Special:Whatlinkshere]]
 736                 if ( $count > $limit ) {
 737                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 738                 }
 739                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 740         }
 741
 742         protected function imageRedirects() {
 743                 global $wgUser, $wgOut, $wgLang;
 744
 745                 $redirects = $this->getTitle()->getRedirectsHere( NS_FILE );
 746                 if ( count( $redirects ) == 0 ) {
 747                         return;
 748                 }
 749
 750                 $wgOut->addHTML( "<div id='mw-imagepage-section-redirectstofile'>\n" );
 751                 $wgOut->addWikiMsg( 'redirectstofile',
 752                         $wgLang->formatNum( count( $redirects ) )
 753                 );
 754                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 755
 756                 $sk = $wgUser->getSkin();
 757                 foreach ( $redirects as $title ) {
 758                         $link = $sk->link(
 759                                 $title,
 760                                 null,
 761                                 array(),
 762                                 array( 'redirect' => 'no' ),
 763                                 array( 'known', 'noclasses' )
 764                         );
 765                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 766                 }
 767                 $wgOut->addHTML( "</ul></div>\n" );
 768         }
 769
 770         protected function imageDupes() {
 771                 global $wgOut, $wgUser, $wgLang;
 772
 773                 $this->loadFile();
 774
 775                 $dupes = $this->getDuplicates();
 776                 if ( count( $dupes ) == 0 ) {
 777                         return;
 778                 }
 779
 780                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 781                 $wgOut->addWikiMsg( 'duplicatesoffile',
 782                         $wgLang->formatNum( count( $dupes ) ), $this->mTitle->getDBkey()
 783                 );
 784                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 785
 786                 $sk = $wgUser->getSkin();
 787                 foreach ( $dupes as $file ) {
 788                         $fromSrc = '';
 789                         if ( $file->isLocal() ) {
 790                                 $link = $sk->link(
 791                                         $file->getTitle(),
 792                                         null,
 793                                         array(),
 794                                         array(),
 795                                         array( 'known', 'noclasses' )
 796                                 );
 797                         } else {
 798                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 799                                         $file->getTitle()->getPrefixedText() );
 800                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 801                         }
 802                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 803                 }
 804                 $wgOut->addHTML( "</ul></div>\n" );
 805         }
 806
 807         /**
 808          * Delete the file, or an earlier version of it
 809          */
 810         public function delete() {
 811                 global $wgUploadMaintenance;
 812                 if ( $wgUploadMaintenance && $this->mTitle && $this->mTitle->getNamespace() == NS_FILE ) {
 813                         global $wgOut;
 814                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
 815                         return;
 816                 }
 817
 818                 $this->loadFile();
 819                 if ( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 820                         // Standard article deletion
 821                         parent::delete();
 822                         return;
 823                 }
 824                 $deleter = new FileDeleteForm( $this->img );
 825                 $deleter->execute();
 826         }
 827
 828         /**
 829          * Revert the file to an earlier version
 830          */
 831         public function revert() {
 832                 $this->loadFile();
 833                 $reverter = new FileRevertForm( $this->img );
 834                 $reverter->execute();
 835         }
 836
 837         /**
 838          * Override handling of action=purge
 839          */
 840         public function doPurge() {
 841                 $this->loadFile();
 842                 if ( $this->img->exists() ) {
 843                         wfDebug( 'ImagePage::doPurge purging ' . $this->img->getName() . "\n" );
 844                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 845                         $update->doUpdate();
 846                         $this->img->upgradeRow();
 847                         $this->img->purgeCache();
 848                 } else {
 849                         wfDebug( 'ImagePage::doPurge no image for ' . $this->img->getName() . "; limiting purge to cache only\n" );
 850                         // even if the file supposedly doesn't exist, force any cached information
 851                         // to be updated (in case the cached information is wrong)
 852                         $this->img->purgeCache();
 853                 }
 854                 parent::doPurge();
 855         }
 856
 857         /**
 858          * Display an error with a wikitext description
 859          */
 860         function showError( $description ) {
 861                 global $wgOut;
 862                 $wgOut->setPageTitle( wfMsg( 'internalerror' ) );
 863                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 864                 $wgOut->setArticleRelated( false );
 865                 $wgOut->enableClientCache( false );
 866                 $wgOut->addWikiText( $description );
 867         }
 868
 869         /**
 870          * Callback for usort() to do link sorts by (namespace, title)
 871          * Function copied from Title::compare()
 872          *
 873          * @param $a object page to compare with
 874          * @param $b object page to compare with
 875          * @return Integer: result of string comparison, or namespace comparison
 876          */
 877         protected function compare( $a, $b ) {
 878                 if ( $a->page_namespace == $b->page_namespace ) {
 879                         return strcmp( $a->page_title, $b->page_title );
 880                 } else {
 881                         return $a->page_namespace - $b->page_namespace;
 882                 }
 883         }
 884 }
 885
 886 /**
 887  * Builds the image revision log shown on image pages
 888  *
 889  * @ingroup Media
 890  */
 891 class ImageHistoryList {
 892
 893         /**
 894          * @var Title
 895          */
 896         protected $title;
 897
 898         /**
 899          * @var File
 900          */
 901         protected $img;
 902
 903         /**
 904          * @var ImagePage
 905          */
 906         protected $imagePage;
 907
 908         /**
 909          * @var Skin
 910          */
 911         protected $skin;
 912
 913         protected $repo, $showThumb;
 914         protected $preventClickjacking = false;
 915
 916         /**
 917          * @param ImagePage $imagePage
 918          */
 919         public function __construct( $imagePage ) {
 920                 global $wgUser, $wgShowArchiveThumbnails;
 921                 $this->skin = $wgUser->getSkin();
 922                 $this->current = $imagePage->getFile();
 923                 $this->img = $imagePage->getDisplayedFile();
 924                 $this->title = $imagePage->getTitle();
 925                 $this->imagePage = $imagePage;
 926                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 927         }
 928
 929         public function getImagePage() {
 930                 return $this->imagePage;
 931         }
 932
 933         public function getSkin() {
 934                 return $this->skin;
 935         }
 936
 937         public function getFile() {
 938                 return $this->img;
 939         }
 940
 941         public function beginImageHistoryList( $navLinks = '' ) {
 942                 global $wgOut, $wgUser;
 943                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 944                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 945                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 946                         . $navLinks . "\n"
 947                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 948                         . '<tr><td></td>'
 949                         . ( $this->current->isLocal() && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 950                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 951                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 952                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 953                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 954                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 955                         . "</tr>\n";
 956         }
 957
 958         public function endImageHistoryList( $navLinks = '' ) {
 959                 return "</table>\n$navLinks\n</div>\n";
 960         }
 961
 962         /**
 963          * @param $iscur
 964          * @param $file File
 965          * @return string
 966          */
 967         public function imageHistoryLine( $iscur, $file ) {
 968                 global $wgUser, $wgLang;
 969
 970                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 971                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 972                 $user = $file->getUser( 'id' );
 973                 $usertext = $file->getUser( 'text' );
 974                 $description = $file->getDescription();
 975
 976                 $local = $this->current->isLocal();
 977                 $row = $selected = '';
 978
 979                 // Deletion link
 980                 if ( $local && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
 981                         $row .= '<td>';
 982                         # Link to remove from history
 983                         if ( $wgUser->isAllowed( 'delete' ) ) {
 984                                 $q = array( 'action' => 'delete' );
 985                                 if ( !$iscur ) {
 986                                         $q['oldimage'] = $img;
 987                                 }
 988                                 $row .= $this->skin->link(
 989                                         $this->title,
 990                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 991                                         array(), $q, array( 'known' )
 992                                 );
 993                         }
 994                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 995                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 996                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 997                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 998                                         $row .= '<br />';
 999                                 }
1000                                 // If file is top revision or locked from this user, don't link
1001                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
1002                                         $del = $this->skin->revDeleteLinkDisabled( $canHide );
1003                                 } else {
1004                                         list( $ts, $name ) = explode( '!', $img, 2 );
1005                                         $query = array(
1006                                                 'type'   => 'oldimage',
1007                                                 'target' => $this->title->getPrefixedText(),
1008                                                 'ids'    => $ts,
1009                                         );
1010                                         $del = $this->skin->revDeleteLink( $query,
1011                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1012                                 }
1013                                 $row .= $del;
1014                         }
1015                         $row .= '</td>';
1016                 }
1017
1018                 // Reversion link/current indicator
1019                 $row .= '<td>';
1020                 if ( $iscur ) {
1021                         $row .= wfMsgHtml( 'filehist-current' );
1022                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
1023                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1024                                 $row .= wfMsgHtml( 'filehist-revert' );
1025                         } else {
1026                                 $row .= $this->skin->link(
1027                                         $this->title,
1028                                         wfMsgHtml( 'filehist-revert' ),
1029                                         array(),
1030                                         array(
1031                                                 'action' => 'revert',
1032                                                 'oldimage' => $img,
1033                                                 'wpEditToken' => $wgUser->editToken( $img )
1034                                         ),
1035                                         array( 'known', 'noclasses' )
1036                                 );
1037                         }
1038                 }
1039                 $row .= '</td>';
1040
1041                 // Date/time and image link
1042                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1043                         $selected = "class='filehistory-selected'";
1044                 }
1045                 $row .= "<td $selected style='white-space: nowrap;'>";
1046                 if ( !$file->userCan( File::DELETED_FILE ) ) {
1047                         # Don't link to unviewable files
1048                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
1049                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1050                         $this->preventClickjacking();
1051                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1052                         # Make a link to review the image
1053                         $url = $this->skin->link(
1054                                 $revdel,
1055                                 $wgLang->timeAndDate( $timestamp, true ),
1056                                 array(),
1057                                 array(
1058                                         'target' => $this->title->getPrefixedText(),
1059                                         'file' => $img,
1060                                         'token' => $wgUser->editToken( $img )
1061                                 ),
1062                                 array( 'known', 'noclasses' )
1063                         );
1064                         $row .= '<span class="history-deleted">' . $url . '</span>';
1065                 } else {
1066                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1067                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
1068                 }
1069                 $row .= "</td>";
1070
1071                 // Thumbnail
1072                 if ( $this->showThumb ) {
1073                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1074                 }
1075
1076                 // Image dimensions + size
1077                 $row .= '<td>';
1078                 $row .= htmlspecialchars( $file->getDimensionsString() );
1079                 $row .= ' <span style="white-space: nowrap;">(' . $this->skin->formatSize( $file->getSize() ) . ')</span>';
1080                 $row .= '</td>';
1081
1082                 // Uploading user
1083                 $row .= '<td>';
1084                 if ( $local ) {
1085                         // Hide deleted usernames
1086                         if ( $file->isDeleted( File::DELETED_USER ) ) {
1087                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1088                         } else {
1089                                 $row .= $this->skin->userLink( $user, $usertext ) . ' <span style="white-space: nowrap;">' .
1090                                         $this->skin->userToolLinks( $user, $usertext ) . '</span>';
1091                         }
1092                 } else {
1093                         $row .= htmlspecialchars( $usertext );
1094                 }
1095                 $row .= '</td><td>';
1096
1097                 // Don't show deleted descriptions
1098                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1099                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
1100                 } else {
1101                         $row .= $this->skin->commentBlock( $description, $this->title );
1102                 }
1103                 $row .= '</td>';
1104
1105                 $rowClass = null;
1106                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1107                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1108
1109                 return "<tr{$classAttr}>{$row}</tr>\n";
1110         }
1111
1112         /**
1113          * @param $file File
1114          * @return string
1115          */
1116         protected function getThumbForLine( $file ) {
1117                 global $wgLang;
1118
1119                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1120                         $params = array(
1121                                 'width' => '120',
1122                                 'height' => '120',
1123                         );
1124                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1125
1126                         $thumbnail = $file->transform( $params );
1127                         $options = array(
1128                                 'alt' => wfMsg( 'filehist-thumbtext',
1129                                         $wgLang->timeAndDate( $timestamp, true ),
1130                                         $wgLang->date( $timestamp, true ),
1131                                         $wgLang->time( $timestamp, true ) ),
1132                                 'file-link' => true,
1133                         );
1134
1135                         if ( !$thumbnail ) {
1136                                 return wfMsgHtml( 'filehist-nothumb' );
1137                         }
1138
1139                         return $thumbnail->toHtml( $options );
1140                 } else {
1141                         return wfMsgHtml( 'filehist-nothumb' );
1142                 }
1143         }
1144
1145         protected function preventClickjacking( $enable = true ) {
1146                 $this->preventClickjacking = $enable;
1147         }
1148
1149         public function getPreventClickjacking() {
1150                 return $this->preventClickjacking;
1151         }
1152 }
1153
1154 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1155         protected $preventClickjacking = false;
1156
1157         /**
1158          * @var File
1159          */
1160         protected $mImg;
1161
1162         /**
1163          * @var Title
1164          */
1165         protected $mTitle;
1166
1167         /**
1168          * @param ImagePage $imagePage
1169          */
1170         function __construct( $imagePage ) {
1171                 parent::__construct();
1172                 $this->mImagePage = $imagePage;
1173                 $this->mTitle = clone ( $imagePage->getTitle() );
1174                 $this->mTitle->setFragment( '#filehistory' );
1175                 $this->mImg = null;
1176                 $this->mHist = array();
1177                 $this->mRange = array( 0, 0 ); // display range
1178         }
1179
1180         function getTitle() {
1181                 return $this->mTitle;
1182         }
1183
1184         function getQueryInfo() {
1185                 return false;
1186         }
1187
1188         function getIndexField() {
1189                 return '';
1190         }
1191
1192         function formatRow( $row ) {
1193                 return '';
1194         }
1195
1196         function getBody() {
1197                 $s = '';
1198                 $this->doQuery();
1199                 if ( count( $this->mHist ) ) {
1200                         $list = new ImageHistoryList( $this->mImagePage );
1201                         # Generate prev/next links
1202                         $navLink = $this->getNavigationBar();
1203                         $s = $list->beginImageHistoryList( $navLink );
1204                         // Skip rows there just for paging links
1205                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1206                                 $file = $this->mHist[$i];
1207                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1208                         }
1209                         $s .= $list->endImageHistoryList( $navLink );
1210
1211                         if ( $list->getPreventClickjacking() ) {
1212                                 $this->preventClickjacking();
1213                         }
1214                 }
1215                 return $s;
1216         }
1217
1218         function doQuery() {
1219                 if ( $this->mQueryDone ) {
1220                         return;
1221                 }
1222                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1223                 if ( !$this->mImg->exists() ) {
1224                         return;
1225                 }
1226                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1227                 if ( $this->mIsBackwards ) {
1228                         // Fetch the file history
1229                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1230                         // The current rev may not meet the offset/limit
1231                         $numRows = count( $this->mHist );
1232                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1233                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1234                         }
1235                 } else {
1236                         // The current rev may not meet the offset
1237                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1238                                 $this->mHist[] = $this->mImg;
1239                         }
1240                         // Old image versions (fetch extra row for nav links)
1241                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1242                         // Fetch the file history
1243                         $this->mHist = array_merge( $this->mHist,
1244                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1245                 }
1246                 $numRows = count( $this->mHist ); // Total number of query results
1247                 if ( $numRows ) {
1248                         # Index value of top item in the list
1249                         $firstIndex = $this->mIsBackwards ?
1250                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1251                         # Discard the extra result row if there is one
1252                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1253                                 if ( $this->mIsBackwards ) {
1254                                         # Index value of item past the index
1255                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1256                                         # Index value of bottom item in the list
1257                                         $lastIndex = $this->mHist[1]->getTimestamp();
1258                                         # Display range
1259                                         $this->mRange = array( 1, $numRows - 1 );
1260                                 } else {
1261                                         # Index value of item past the index
1262                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1263                                         # Index value of bottom item in the list
1264                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1265                                         # Display range
1266                                         $this->mRange = array( 0, $numRows - 2 );
1267                                 }
1268                         } else {
1269                                 # Setting indexes to an empty string means that they will be
1270                                 # omitted if they would otherwise appear in URLs. It just so
1271                                 # happens that this  is the right thing to do in the standard
1272                                 # UI, in all the relevant cases.
1273                                 $this->mPastTheEndIndex = '';
1274                                 # Index value of bottom item in the list
1275                                 $lastIndex = $this->mIsBackwards ?
1276                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1277                                 # Display range
1278                                 $this->mRange = array( 0, $numRows - 1 );
1279                         }
1280                 } else {
1281                         $firstIndex = '';
1282                         $lastIndex = '';
1283                         $this->mPastTheEndIndex = '';
1284                 }
1285                 if ( $this->mIsBackwards ) {
1286                         $this->mIsFirst = ( $numRows < $queryLimit );
1287                         $this->mIsLast = ( $this->mOffset == '' );
1288                         $this->mLastShown = $firstIndex;
1289                         $this->mFirstShown = $lastIndex;
1290                 } else {
1291                         $this->mIsFirst = ( $this->mOffset == '' );
1292                         $this->mIsLast = ( $numRows < $queryLimit );
1293                         $this->mLastShown = $lastIndex;
1294                         $this->mFirstShown = $firstIndex;
1295                 }
1296                 $this->mQueryDone = true;
1297         }
1298
1299         protected function preventClickjacking( $enable = true ) {
1300                 $this->preventClickjacking = $enable;
1301         }
1302
1303         public function getPreventClickjacking() {
1304                 return $this->preventClickjacking;
1305         }
1306
1307 }