includes/ImagePage.php

   1 <?php
   2 /**
   3  * Class for viewing MediaWiki file description pages
   4  *
   5  * @ingroup Media
   6  */
   7 class ImagePage extends Article {
   8
   9         /**
  10          * @var File
  11          */
  12         private $displayImg;
  13         /**
  14          * @var FileRepo
  15          */
  16         private $repo;
  17         private $fileLoaded;
  18
  19         var $mExtraDescription = false;
  20
  21         /**
  22          * @param $title Title
  23          * @return WikiFilePage
  24          */
  25         protected function newPage( Title $title ) {
  26                 // Overload mPage with a file-specific page
  27                 return new WikiFilePage( $title );
  28         }
  29
  30         /**
  31          * Constructor from a page id
  32          * @param $id Int article ID to load
  33          * @returnImagePage|null
  34          */
  35         public static function newFromID( $id ) {
  36                 $t = Title::newFromID( $id );
  37                 # @todo FIXME: Doesn't inherit right
  38                 return $t == null ? null : new self( $t );
  39                 # return $t == null ? null : new static( $t ); // PHP 5.3
  40         }
  41
  42         /**
  43          * @param $file File:
  44          * @return void
  45          */
  46         public function setFile( $file ) {
  47                 $this->mPage->setFile( $file );
  48                 $this->displayImg = $file;
  49                 $this->fileLoaded = true;
  50         }
  51
  52         protected function loadFile() {
  53                 if ( $this->fileLoaded ) {
  54                         return true;
  55                 }
  56                 $this->fileLoaded = true;
  57
  58                 $this->displayImg = $img = false;
  59                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  60                 if ( !$img ) { // not set by hook?
  61                         $img = wfFindFile( $this->getTitle() );
  62                         if ( !$img ) {
  63                                 $img = wfLocalFile( $this->getTitle() );
  64                         }
  65                 }
  66                 $this->mPage->setFile( $img );
  67                 if ( !$this->displayImg ) { // not set by hook?
  68                         $this->displayImg = $img;
  69                 }
  70                 $this->repo = $img->getRepo();
  71         }
  72
  73         /**
  74          * Handler for action=render
  75          * Include body text only; none of the image extras
  76          */
  77         public function render() {
  78                 global $wgOut;
  79                 $wgOut->setArticleBodyOnly( true );
  80                 parent::view();
  81         }
  82
  83         public function view() {
  84                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  85
  86                 $diff = $wgRequest->getVal( 'diff' );
  87                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  88
  89                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  90                         return parent::view();
  91                 }
  92
  93                 $this->loadFile();
  94
  95                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
  96                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || isset( $diff ) ) {
  97                                 // mTitle is the same as the redirect target so ask Article
  98                                 // to perform the redirect for us.
  99                                 $wgRequest->setVal( 'diffonly', 'true' );
 100                                 return parent::view();
 101                         } else {
 102                                 // mTitle is not the same as the redirect target so it is
 103                                 // probably the redirect page itself. Fake the redirect symbol
 104                                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 105                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 106                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 107                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 108                                 return;
 109                         }
 110                 }
 111
 112                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 113                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 114                         $formattedMetadata = $this->displayImg->formatMetadata();
 115                         $showmeta = $formattedMetadata !== false;
 116                 } else {
 117                         $showmeta = false;
 118                 }
 119
 120                 if ( !$diff && $this->displayImg->exists() ) {
 121                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 122                 }
 123
 124                 if ( !$diff ) {
 125                         $this->openShowImage();
 126                 }
 127
 128                 # No need to display noarticletext, we use our own message, output in openShowImage()
 129                 if ( $this->mPage->getID() ) {
 130                         # NS_FILE is in the user language, but this section (the actual wikitext)
 131                         # should be in page content language
 132                         $pageLang = $this->getTitle()->getPageLanguage();
 133                         $wgOut->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 134                                 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
 135                                 'class' => 'mw-content-'.$pageLang->getDir() ) ) );
 136                         parent::view();
 137                         $wgOut->addHTML( Xml::closeElement( 'div' ) );
 138                 } else {
 139                         # Just need to set the right headers
 140                         $wgOut->setArticleFlag( true );
 141                         $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 142                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 143                 }
 144
 145                 # Show shared description, if needed
 146                 if ( $this->mExtraDescription ) {
 147                         $fol = wfMessage( 'shareddescriptionfollows' );
 148                         if ( !$fol->isDisabled() ) {
 149                                 $wgOut->addWikiText( $fol->plain() );
 150                         }
 151                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 152                 }
 153
 154                 $this->closeShowImage();
 155                 $this->imageHistory();
 156                 // TODO: Cleanup the following
 157
 158                 $wgOut->addHTML( Xml::element( 'h2',
 159                         array( 'id' => 'filelinks' ),
 160                         wfMsg( 'imagelinks' ) ) . "\n" );
 161                 $this->imageDupes();
 162                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 163                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 164                 $this->imageLinks();
 165
 166                 # Allow extensions to add something after the image links
 167                 $html = '';
 168                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 169                 if ( $html ) {
 170                         $wgOut->addHTML( $html );
 171                 }
 172
 173                 if ( $showmeta ) {
 174                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 175                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 176                         $wgOut->addModules( array( 'mediawiki.action.view.metadata' ) );
 177                 }
 178
 179                 // Add remote Filepage.css
 180                 if( !$this->repo->isLocal() ) {
 181                         $css = $this->repo->getDescriptionStylesheetUrl();
 182                         if ( $css ) {
 183                                 $wgOut->addStyle( $css );
 184                         }
 185                 }
 186                 // always show the local local Filepage.css, bug 29277
 187                 $wgOut->addModuleStyles( 'filepage' );
 188         }
 189
 190         /**
 191          * @return File
 192          */
 193         public function getDisplayedFile() {
 194                 $this->loadFile();
 195                 return $this->displayImg;
 196         }
 197
 198         /**
 199          * Create the TOC
 200          *
 201          * @param $metadata Boolean: whether or not to show the metadata link
 202          * @return String
 203          */
 204         protected function showTOC( $metadata ) {
 205                 $r = array(
 206                         '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 207                         '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 208                         '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 209                 );
 210                 if ( $metadata ) {
 211                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 212                 }
 213
 214                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 215
 216                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 217         }
 218
 219         /**
 220          * Make a table with metadata to be shown in the output page.
 221          *
 222          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 223          *
 224          * @param $metadata Array: the array containing the EXIF data
 225          * @return String The metadata table. This is treated as Wikitext (!)
 226          */
 227         protected function makeMetadataTable( $metadata ) {
 228                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 229                 $r .= wfMsgNoTrans( 'metadata-help' );
 230                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 231                 foreach ( $metadata as $type => $stuff ) {
 232                         foreach ( $stuff as $v ) {
 233                                 # @todo FIXME: Why is this using escapeId for a class?!
 234                                 $class = Sanitizer::escapeId( $v['id'] );
 235                                 if ( $type == 'collapsed' ) {
 236                                         $class .= ' collapsable';
 237                                 }
 238                                 $r .= "<tr class=\"$class\">\n";
 239                                 $r .= "<th>{$v['name']}</th>\n";
 240                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 241                         }
 242                 }
 243                 $r .= "</table>\n</div>\n";
 244                 return $r;
 245         }
 246
 247         /**
 248          * Overloading Article's getContent method.
 249          *
 250          * Omit noarticletext if sharedupload; text will be fetched from the
 251          * shared upload server if possible.
 252          * @return string
 253          */
 254         public function getContent() {
 255                 $this->loadFile();
 256                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 257                         return '';
 258                 }
 259                 return parent::getContent();
 260         }
 261
 262         protected function openShowImage() {
 263                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 264                         $wgLang, $wgEnableUploads, $wgSend404Code;
 265
 266                 $this->loadFile();
 267
 268                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 269                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 270                         $sizeSel = User::getDefaultOption( 'imagesize' );
 271
 272                         // The user offset might still be incorrect, specially if
 273                         // $wgImageLimits got changed (see bug #8858).
 274                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 275                                 // Default to the first offset in $wgImageLimits
 276                                 $sizeSel = 0;
 277                         }
 278                 }
 279                 $max = $wgImageLimits[$sizeSel];
 280                 $maxWidth = $max[0];
 281                 $maxHeight = $max[1];
 282                 $dirmark = $wgLang->getDirMark();
 283
 284                 if ( $this->displayImg->exists() ) {
 285                         # image
 286                         $page = $wgRequest->getIntOrNull( 'page' );
 287                         if ( is_null( $page ) ) {
 288                                 $params = array();
 289                                 $page = 1;
 290                         } else {
 291                                 $params = array( 'page' => $page );
 292                         }
 293                         $width_orig = $this->displayImg->getWidth( $page );
 294                         $width = $width_orig;
 295                         $height_orig = $this->displayImg->getHeight( $page );
 296                         $height = $height_orig;
 297
 298                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 299
 300                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 301
 302                         if ( $this->displayImg->allowInlineDisplay() ) {
 303                                 # image
 304
 305                                 # "Download high res version" link below the image
 306                                 # $msgsize = wfMsgHtml( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime );
 307                                 # We'll show a thumbnail of this image
 308                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 309                                         # Calculate the thumbnail size.
 310                                         # First case, the limiting factor is the width, not the height.
 311                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 312                                                 $height = round( $height * $maxWidth / $width );
 313                                                 $width = $maxWidth;
 314                                                 # Note that $height <= $maxHeight now.
 315                                         } else {
 316                                                 $newwidth = floor( $width * $maxHeight / $height );
 317                                                 $height = round( $height * $newwidth / $width );
 318                                                 $width = $newwidth;
 319                                                 # Note that $height <= $maxHeight now, but might not be identical
 320                                                 # because of rounding.
 321                                         }
 322                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 323                                         $otherSizes = array();
 324                                         foreach ( $wgImageLimits as $size ) {
 325                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig &&
 326                                                                 $size[0] != $width && $size[1] != $height ) {
 327                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 328                                                 }
 329                                         }
 330                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 331                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 332                                                 parse();
 333                                         if ( count( $otherSizes ) && $this->displayImg->getRepo()->canTransformVia404() ) {
 334                                                 $msgsmall .= ' ' .
 335                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 336                                                         wfMessage( 'show-big-image-other' )->rawParams( $wgLang->pipeList( $otherSizes ) )->
 337                                                         params( count( $otherSizes ) )->parse()
 338                                                 );
 339                                         }
 340                                 } elseif ( $width == 0 && $height == 0 ){
 341                                         # Some sort of audio file that doesn't have dimensions
 342                                         # Don't output a no hi res message for such a file
 343                                         $msgsmall = '';
 344                                 } else {
 345                                         # Image is small enough to show full size on image page
 346                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 347                                 }
 348
 349                                 $params['width'] = $width;
 350                                 $params['height'] = $height;
 351                                 $thumbnail = $this->displayImg->transform( $params );
 352
 353                                 $showLink = true;
 354                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 355
 356                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 357                                 if ( $isMulti ) {
 358                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 359                                 }
 360
 361                                 if ( $thumbnail ) {
 362                                         $options = array(
 363                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 364                                                 'file-link' => true,
 365                                         );
 366                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 367                                                 $thumbnail->toHtml( $options ) .
 368                                                 $anchorclose . "</div>\n" );
 369                                 }
 370
 371                                 if ( $isMulti ) {
 372                                         $count = $this->displayImg->pageCount();
 373
 374                                         if ( $page > 1 ) {
 375                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 376                                                 $link = Linker::link(
 377                                                         $this->getTitle(),
 378                                                         $label,
 379                                                         array(),
 380                                                         array( 'page' => $page - 1 ),
 381                                                         array( 'known', 'noclasses' )
 382                                                 );
 383                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 384                                                         array( 'page' => $page - 1 ) );
 385                                         } else {
 386                                                 $thumb1 = '';
 387                                         }
 388
 389                                         if ( $page < $count ) {
 390                                                 $label = wfMsg( 'imgmultipagenext' );
 391                                                 $link = Linker::link(
 392                                                         $this->getTitle(),
 393                                                         $label,
 394                                                         array(),
 395                                                         array( 'page' => $page + 1 ),
 396                                                         array( 'known', 'noclasses' )
 397                                                 );
 398                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 399                                                         array( 'page' => $page + 1 ) );
 400                                         } else {
 401                                                 $thumb2 = '';
 402                                         }
 403
 404                                         global $wgScript;
 405
 406                                         $formParams = array(
 407                                                 'name' => 'pageselector',
 408                                                 'action' => $wgScript,
 409                                                 'onchange' => 'document.pageselector.submit();',
 410                                         );
 411                                         $options = array();
 412                                         for ( $i = 1; $i <= $count; $i++ ) {
 413                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 414                                         }
 415                                         $select = Xml::tags( 'select',
 416                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 417                                                 implode( "\n", $options ) );
 418
 419                                         $wgOut->addHTML(
 420                                                 '</td><td><div class="multipageimagenavbox">' .
 421                                                 Xml::openElement( 'form', $formParams ) .
 422                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 423                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 424                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 425                                                 Xml::closeElement( 'form' ) .
 426                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 427                                         );
 428                                 }
 429                         } else {
 430                                 # if direct link is allowed but it's not a renderable image, show an icon.
 431                                 if ( $this->displayImg->isSafeFile() ) {
 432                                         $icon = $this->displayImg->iconThumb();
 433
 434                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 435                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 436                                                 "</div>\n" );
 437                                 }
 438
 439                                 $showLink = true;
 440                         }
 441
 442                         if ( $showLink ) {
 443                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 444                                 $linktext = $filename;
 445                                 if ( isset( $msgbig ) ) {
 446                                         $linktext = wfEscapeWikiText( $msgbig );
 447                                 }
 448                                 $medialink = "[[Media:$filename|$linktext]]";
 449
 450                                 if ( !$this->displayImg->isSafeFile() ) {
 451                                         $warning = wfMsgNoTrans( 'mediawarning' );
 452                                         $wgOut->addWikiText( <<<EOT
 453 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 454 <div class="mediaWarning">$warning</div>
 455 EOT
 456                                                 );
 457                                 } else {
 458                                         $wgOut->addWikiText( <<<EOT
 459 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 460 </div>
 461 EOT
 462                                         );
 463                                 }
 464                         }
 465
 466                         if ( !$this->displayImg->isLocal() ) {
 467                                 $this->printSharedImageText();
 468                         }
 469                 } else {
 470                         # Image does not exist
 471                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 472                                 // Only show an upload link if the user can upload
 473                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 474                                 $nofile = array(
 475                                         'filepage-nofile-link',
 476                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 477                                 );
 478                         } else {
 479                                 $nofile = 'filepage-nofile';
 480                         }
 481                         // Note, if there is an image description page, but
 482                         // no image, then this setRobotPolicy is overriden
 483                         // by Article::View().
 484                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 485                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 486                         if ( !$this->getID() && $wgSend404Code ) {
 487                                 // If there is no image, no shared image, and no description page,
 488                                 // output a 404, to be consistent with articles.
 489                                 $wgRequest->response()->header( 'HTTP/1.1 404 Not Found' );
 490                         }
 491                 }
 492                 $wgOut->setFileVersion( $this->displayImg );
 493         }
 494
 495         /**
 496          * Creates an thumbnail of specified size and returns an HTML link to it
 497          * @param $params array Scaler parameters
 498          * @param $width int
 499          * @param $height int
 500          * @return string
 501          */
 502         private function makeSizeLink( $params, $width, $height ) {
 503                 $params['width'] = $width;
 504                 $params['height'] = $height;
 505                 $thumbnail = $this->displayImg->transform( $params );
 506                 if ( $thumbnail && !$thumbnail->isError() ) {
 507                         return Html::rawElement( 'a', array(
 508                                 'href' => $thumbnail->getUrl(),
 509                                 'class' => 'mw-thumbnail-link'
 510                                 ), wfMessage( 'show-big-image-size' )->numParams(
 511                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 512                                 )->parse() );
 513                 } else {
 514                         return '';
 515                 }
 516         }
 517
 518         /**
 519          * Show a notice that the file is from a shared repository
 520          */
 521         protected function printSharedImageText() {
 522                 global $wgOut;
 523
 524                 $this->loadFile();
 525
 526                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 527                 $descText = $this->mPage->getFile()->getDescriptionText();
 528
 529                 /* Add canonical to head if there is no local page for this shared file */
 530                 if( $descUrl && $this->mPage->getID() == 0 ) {
 531                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 532                 }
 533
 534                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 535                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 536
 537                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 538                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 539                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 540                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 541                 } else {
 542                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 543                 }
 544
 545                 if ( $descText ) {
 546                         $this->mExtraDescription = $descText;
 547                 }
 548         }
 549
 550         public function getUploadUrl() {
 551                 $this->loadFile();
 552                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 553                 return $uploadTitle->getFullURL( array(
 554                         'wpDestFile' => $this->mPage->getFile()->getName(),
 555                         'wpForReUpload' => 1
 556                  ) );
 557         }
 558
 559         /**
 560          * Print out the various links at the bottom of the image page, e.g. reupload,
 561          * external editing (and instructions link) etc.
 562          */
 563         protected function uploadLinksBox() {
 564                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 565
 566                 if ( !$wgEnableUploads ) {
 567                         return;
 568                 }
 569
 570                 $this->loadFile();
 571                 if ( !$this->mPage->getFile()->isLocal() ) {
 572                         return;
 573                 }
 574
 575                 $wgOut->addHTML( "<br /><ul>\n" );
 576
 577                 # "Upload a new version of this file" link
 578                 if ( UploadBase::userCanReUpload( $wgUser, $this->mPage->getFile()->name ) ) {
 579                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 580                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 581                 }
 582
 583                 # External editing link
 584                 if ( $wgUseExternalEditor ) {
 585                         $elink = Linker::link(
 586                                 $this->getTitle(),
 587                                 wfMsgHtml( 'edit-externally' ),
 588                                 array(),
 589                                 array(
 590                                         'action' => 'edit',
 591                                         'externaledit' => 'true',
 592                                         'mode' => 'file'
 593                                 ),
 594                                 array( 'known', 'noclasses' )
 595                         );
 596                         $wgOut->addHTML(
 597                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 598                                 wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) .
 599                                 "</small></li>\n"
 600                         );
 601                 }
 602
 603                 $wgOut->addHTML( "</ul>\n" );
 604         }
 605
 606         protected function closeShowImage() { } # For overloading
 607
 608         /**
 609          * If the page we've just displayed is in the "Image" namespace,
 610          * we follow it with an upload history of the image and its usage.
 611          */
 612         protected function imageHistory() {
 613                 global $wgOut;
 614
 615                 $this->loadFile();
 616                 $pager = new ImageHistoryPseudoPager( $this );
 617                 $wgOut->addHTML( $pager->getBody() );
 618                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 619
 620                 $this->mPage->getFile()->resetHistory(); // free db resources
 621
 622                 # Exist check because we don't want to show this on pages where an image
 623                 # doesn't exist along with the noimage message, that would suck. -ævar
 624                 if ( $this->mPage->getFile()->exists() ) {
 625                         $this->uploadLinksBox();
 626                 }
 627         }
 628
 629         /**
 630          * @param $target
 631          * @param $limit
 632          * @return ResultWrapper
 633          */
 634         protected function queryImageLinks( $target, $limit ) {
 635                 $dbr = wfGetDB( DB_SLAVE );
 636
 637                 return $dbr->select(
 638                         array( 'imagelinks', 'page' ),
 639                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 640                         array( 'il_to' => $target, 'il_from = page_id' ),
 641                         __METHOD__,
 642                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 643                 );
 644         }
 645
 646         protected function imageLinks() {
 647                 global $wgOut, $wgLang;
 648
 649                 $limit = 100;
 650
 651                 $res = $this->queryImageLinks( $this->getTitle()->getDbKey(), $limit + 1);
 652                 $rows = array();
 653                 $redirects = array();
 654                 foreach ( $res as $row ) {
 655                         if ( $row->page_is_redirect ) {
 656                                 $redirects[$row->page_title] = array();
 657                         }
 658                         $rows[] = $row;
 659                 }
 660                 $count = count( $rows );
 661
 662                 $hasMore = $count > $limit;
 663                 if ( !$hasMore && count( $redirects ) ) {
 664                         $res = $this->queryImageLinks( array_keys( $redirects ),
 665                                 $limit - count( $rows ) + 1 );
 666                         foreach ( $res as $row ) {
 667                                 $redirects[$row->il_to][] = $row;
 668                                 $count++;
 669                         }
 670                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 671                 }
 672
 673                 if ( $count == 0 ) {
 674                         $wgOut->wrapWikiMsg(
 675                                 Html::rawElement( 'div',
 676                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 677                                 'nolinkstoimage'
 678                         );
 679                         return;
 680                 }
 681
 682                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 683                 if ( !$hasMore ) {
 684                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 685                 } else {
 686                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 687                         $wgOut->addWikiMsg( 'linkstoimage-more',
 688                                 $wgLang->formatNum( $limit ),
 689                                 $this->getTitle()->getPrefixedDBkey()
 690                         );
 691                 }
 692
 693                 $wgOut->addHTML(
 694                         Html::openElement( 'ul',
 695                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 696                 );
 697                 $count = 0;
 698
 699                 // Sort the list by namespace:title
 700                 usort( $rows, array( $this, 'compare' ) );
 701
 702                 // Create links for every element
 703                 $currentCount = 0;
 704                 foreach( $rows as $element ) {
 705                         $currentCount++;
 706                         if ( $currentCount > $limit ) {
 707                                 break;
 708                         }
 709
 710                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 711                         if ( !isset( $redirects[$element->page_title] ) ) {
 712                                 $liContents = $link;
 713                         } else {
 714                                 $ul = "<ul class='mw-imagepage-redirectstofile'>\n";
 715                                 foreach ( $redirects[$element->page_title] as $row ) {
 716                                         $currentCount++;
 717                                         if ( $currentCount > $limit ) {
 718                                                 break;
 719                                         }
 720
 721                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 722                                         $ul .= Html::rawElement(
 723                                                 'li',
 724                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 725                                                 $link2
 726                                                 ) . "\n";
 727                                 }
 728                                 $ul .= '</ul>';
 729                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 730                                         $link, $ul )->parse();
 731                         }
 732                         $wgOut->addHTML( Html::rawElement(
 733                                         'li',
 734                                         array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 735                                         $liContents
 736                                 ) . "\n"
 737                         );
 738
 739                 };
 740                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 741                 $res->free();
 742
 743                 // Add a links to [[Special:Whatlinkshere]]
 744                 if ( $count > $limit ) {
 745                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 746                 }
 747                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 748         }
 749
 750         protected function imageDupes() {
 751                 global $wgOut, $wgLang;
 752
 753                 $this->loadFile();
 754
 755                 $dupes = $this->mPage->getDuplicates();
 756                 if ( count( $dupes ) == 0 ) {
 757                         return;
 758                 }
 759
 760                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 761                 $wgOut->addWikiMsg( 'duplicatesoffile',
 762                         $wgLang->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 763                 );
 764                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 765
 766                 /**
 767                  * @var $file File
 768                  */
 769                 foreach ( $dupes as $file ) {
 770                         $fromSrc = '';
 771                         if ( $file->isLocal() ) {
 772                                 $link = Linker::link(
 773                                         $file->getTitle(),
 774                                         null,
 775                                         array(),
 776                                         array(),
 777                                         array( 'known', 'noclasses' )
 778                                 );
 779                         } else {
 780                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 781                                         $file->getTitle()->getPrefixedText() );
 782                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 783                         }
 784                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 785                 }
 786                 $wgOut->addHTML( "</ul></div>\n" );
 787         }
 788
 789         /**
 790          * Delete the file, or an earlier version of it
 791          */
 792         public function delete() {
 793                 $file = $this->mPage->getFile();
 794                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 795                         // Standard article deletion
 796                         parent::delete();
 797                         return;
 798                 }
 799
 800                 $deleter = new FileDeleteForm( $file );
 801                 $deleter->execute();
 802         }
 803
 804         /**
 805          * Display an error with a wikitext description
 806          *
 807          * @param $description String
 808          */
 809         function showError( $description ) {
 810                 global $wgOut;
 811                 $wgOut->setPageTitle( wfMessage( 'internalerror' ) );
 812                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 813                 $wgOut->setArticleRelated( false );
 814                 $wgOut->enableClientCache( false );
 815                 $wgOut->addWikiText( $description );
 816         }
 817
 818         /**
 819          * Callback for usort() to do link sorts by (namespace, title)
 820          * Function copied from Title::compare()
 821          *
 822          * @param $a object page to compare with
 823          * @param $b object page to compare with
 824          * @return Integer: result of string comparison, or namespace comparison
 825          */
 826         protected function compare( $a, $b ) {
 827                 if ( $a->page_namespace == $b->page_namespace ) {
 828                         return strcmp( $a->page_title, $b->page_title );
 829                 } else {
 830                         return $a->page_namespace - $b->page_namespace;
 831                 }
 832         }
 833 }
 834
 835 /**
 836  * Builds the image revision log shown on image pages
 837  *
 838  * @ingroup Media
 839  */
 840 class ImageHistoryList {
 841
 842         /**
 843          * @var Title
 844          */
 845         protected $title;
 846
 847         /**
 848          * @var File
 849          */
 850         protected $img;
 851
 852         /**
 853          * @var ImagePage
 854          */
 855         protected $imagePage;
 856
 857         /**
 858          * @var File
 859          */
 860         protected $current;
 861
 862         protected $repo, $showThumb;
 863         protected $preventClickjacking = false;
 864
 865         /**
 866          * @param ImagePage $imagePage
 867          */
 868         public function __construct( $imagePage ) {
 869                 global $wgShowArchiveThumbnails;
 870                 $this->current = $imagePage->getFile();
 871                 $this->img = $imagePage->getDisplayedFile();
 872                 $this->title = $imagePage->getTitle();
 873                 $this->imagePage = $imagePage;
 874                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 875         }
 876
 877         /**
 878          * @return ImagePage
 879          */
 880         public function getImagePage() {
 881                 return $this->imagePage;
 882         }
 883
 884         /**
 885          * @return File
 886          */
 887         public function getFile() {
 888                 return $this->img;
 889         }
 890
 891         /**
 892          * @param $navLinks string
 893          * @return string
 894          */
 895         public function beginImageHistoryList( $navLinks = '' ) {
 896                 global $wgOut, $wgUser;
 897                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 898                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 899                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 900                         . $navLinks . "\n"
 901                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 902                         . '<tr><td></td>'
 903                         . ( $this->current->isLocal() && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 904                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 905                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 906                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 907                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 908                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 909                         . "</tr>\n";
 910         }
 911
 912         /**
 913          * @param $navLinks string
 914          * @return string
 915          */
 916         public function endImageHistoryList( $navLinks = '' ) {
 917                 return "</table>\n$navLinks\n</div>\n";
 918         }
 919
 920         /**
 921          * @param $iscur
 922          * @param $file File
 923          * @return string
 924          */
 925         public function imageHistoryLine( $iscur, $file ) {
 926                 global $wgUser, $wgLang, $wgContLang;
 927
 928                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 929                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 930                 $user = $file->getUser( 'id' );
 931                 $usertext = $file->getUser( 'text' );
 932                 $description = $file->getDescription();
 933
 934                 $local = $this->current->isLocal();
 935                 $row = $selected = '';
 936
 937                 // Deletion link
 938                 if ( $local && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
 939                         $row .= '<td>';
 940                         # Link to remove from history
 941                         if ( $wgUser->isAllowed( 'delete' ) ) {
 942                                 $q = array( 'action' => 'delete' );
 943                                 if ( !$iscur ) {
 944                                         $q['oldimage'] = $img;
 945                                 }
 946                                 $row .= Linker::link(
 947                                         $this->title,
 948                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 949                                         array(), $q, array( 'known' )
 950                                 );
 951                         }
 952                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 953                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 954                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 955                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 956                                         $row .= '<br />';
 957                                 }
 958                                 // If file is top revision or locked from this user, don't link
 959                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 960                                         $del = Linker::revDeleteLinkDisabled( $canHide );
 961                                 } else {
 962                                         list( $ts, $name ) = explode( '!', $img, 2 );
 963                                         $query = array(
 964                                                 'type'   => 'oldimage',
 965                                                 'target' => $this->title->getPrefixedText(),
 966                                                 'ids'    => $ts,
 967                                         );
 968                                         $del = Linker::revDeleteLink( $query,
 969                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 970                                 }
 971                                 $row .= $del;
 972                         }
 973                         $row .= '</td>';
 974                 }
 975
 976                 // Reversion link/current indicator
 977                 $row .= '<td>';
 978                 if ( $iscur ) {
 979                         $row .= wfMsgHtml( 'filehist-current' );
 980                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 981                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 982                                 $row .= wfMsgHtml( 'filehist-revert' );
 983                         } else {
 984                                 $row .= Linker::link(
 985                                         $this->title,
 986                                         wfMsgHtml( 'filehist-revert' ),
 987                                         array(),
 988                                         array(
 989                                                 'action' => 'revert',
 990                                                 'oldimage' => $img,
 991                                                 'wpEditToken' => $wgUser->getEditToken( $img )
 992                                         ),
 993                                         array( 'known', 'noclasses' )
 994                                 );
 995                         }
 996                 }
 997                 $row .= '</td>';
 998
 999                 // Date/time and image link
1000                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1001                         $selected = "class='filehistory-selected'";
1002                 }
1003                 $row .= "<td $selected style='white-space: nowrap;'>";
1004                 if ( !$file->userCan( File::DELETED_FILE ) ) {
1005                         # Don't link to unviewable files
1006                         $row .= '<span class="history-deleted">' . $wgLang->timeanddate( $timestamp, true ) . '</span>';
1007                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1008                         if ( $local ) {
1009                                 $this->preventClickjacking();
1010                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1011                                 # Make a link to review the image
1012                                 $url = Linker::link(
1013                                         $revdel,
1014                                         $wgLang->timeanddate( $timestamp, true ),
1015                                         array(),
1016                                         array(
1017                                                 'target' => $this->title->getPrefixedText(),
1018                                                 'file' => $img,
1019                                                 'token' => $wgUser->getEditToken( $img )
1020                                         ),
1021                                         array( 'known', 'noclasses' )
1022                                 );
1023                         } else {
1024                                 $url = $wgLang->timeanddate( $timestamp, true );
1025                         }
1026                         $row .= '<span class="history-deleted">' . $url . '</span>';
1027                 } else {
1028                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1029                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeanddate( $timestamp, true ) );
1030                 }
1031                 $row .= "</td>";
1032
1033                 // Thumbnail
1034                 if ( $this->showThumb ) {
1035                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1036                 }
1037
1038                 // Image dimensions + size
1039                 $row .= '<td>';
1040                 $row .= htmlspecialchars( $file->getDimensionsString() );
1041                 $row .= ' <span style="white-space: nowrap;">(' . Linker::formatSize( $file->getSize() ) . ')</span>';
1042                 $row .= '</td>';
1043
1044                 // Uploading user
1045                 $row .= '<td>';
1046                 // Hide deleted usernames
1047                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1048                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1049                 } else {
1050                         if ( $local ) {
1051                                 $row .= Linker::userLink( $user, $usertext ) . ' <span style="white-space: nowrap;">' .
1052                                 Linker::userToolLinks( $user, $usertext ) . '</span>';
1053                         } else {
1054                                 $row .= htmlspecialchars( $usertext );
1055                         }
1056                 }
1057                 $row .= '</td>';
1058
1059                 // Don't show deleted descriptions
1060                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1061                         $row .= '<td><span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></td>';
1062                 } else {
1063                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1064                 }
1065
1066                 $rowClass = null;
1067                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1068                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1069
1070                 return "<tr{$classAttr}>{$row}</tr>\n";
1071         }
1072
1073         /**
1074          * @param $file File
1075          * @return string
1076          */
1077         protected function getThumbForLine( $file ) {
1078                 global $wgLang;
1079
1080                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1081                         $params = array(
1082                                 'width' => '120',
1083                                 'height' => '120',
1084                         );
1085                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1086
1087                         $thumbnail = $file->transform( $params );
1088                         $options = array(
1089                                 'alt' => wfMsg( 'filehist-thumbtext',
1090                                         $wgLang->timeanddate( $timestamp, true ),
1091                                         $wgLang->date( $timestamp, true ),
1092                                         $wgLang->time( $timestamp, true ) ),
1093                                 'file-link' => true,
1094                         );
1095
1096                         if ( !$thumbnail ) {
1097                                 return wfMsgHtml( 'filehist-nothumb' );
1098                         }
1099
1100                         return $thumbnail->toHtml( $options );
1101                 } else {
1102                         return wfMsgHtml( 'filehist-nothumb' );
1103                 }
1104         }
1105
1106         /**
1107          * @param $enable bool
1108          */
1109         protected function preventClickjacking( $enable = true ) {
1110                 $this->preventClickjacking = $enable;
1111         }
1112
1113         /**
1114          * @return bool
1115          */
1116         public function getPreventClickjacking() {
1117                 return $this->preventClickjacking;
1118         }
1119 }
1120
1121 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1122         protected $preventClickjacking = false;
1123
1124         /**
1125          * @var File
1126          */
1127         protected $mImg;
1128
1129         /**
1130          * @var Title
1131          */
1132         protected $mTitle;
1133
1134         /**
1135          * @param ImagePage $imagePage
1136          */
1137         function __construct( $imagePage ) {
1138                 parent::__construct();
1139                 $this->mImagePage = $imagePage;
1140                 $this->mTitle = clone ( $imagePage->getTitle() );
1141                 $this->mTitle->setFragment( '#filehistory' );
1142                 $this->mImg = null;
1143                 $this->mHist = array();
1144                 $this->mRange = array( 0, 0 ); // display range
1145         }
1146
1147         /**
1148          * @return Title
1149          */
1150         function getTitle() {
1151                 return $this->mTitle;
1152         }
1153
1154         function getQueryInfo() {
1155                 return false;
1156         }
1157
1158         /**
1159          * @return string
1160          */
1161         function getIndexField() {
1162                 return '';
1163         }
1164
1165         /**
1166          * @return string
1167          */
1168         function formatRow( $row ) {
1169                 return '';
1170         }
1171
1172         /**
1173          * @return string
1174          */
1175         function getBody() {
1176                 $s = '';
1177                 $this->doQuery();
1178                 if ( count( $this->mHist ) ) {
1179                         $list = new ImageHistoryList( $this->mImagePage );
1180                         # Generate prev/next links
1181                         $navLink = $this->getNavigationBar();
1182                         $s = $list->beginImageHistoryList( $navLink );
1183                         // Skip rows there just for paging links
1184                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1185                                 $file = $this->mHist[$i];
1186                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1187                         }
1188                         $s .= $list->endImageHistoryList( $navLink );
1189
1190                         if ( $list->getPreventClickjacking() ) {
1191                                 $this->preventClickjacking();
1192                         }
1193                 }
1194                 return $s;
1195         }
1196
1197         function doQuery() {
1198                 if ( $this->mQueryDone ) {
1199                         return;
1200                 }
1201                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1202                 if ( !$this->mImg->exists() ) {
1203                         return;
1204                 }
1205                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1206                 if ( $this->mIsBackwards ) {
1207                         // Fetch the file history
1208                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1209                         // The current rev may not meet the offset/limit
1210                         $numRows = count( $this->mHist );
1211                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1212                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1213                         }
1214                 } else {
1215                         // The current rev may not meet the offset
1216                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1217                                 $this->mHist[] = $this->mImg;
1218                         }
1219                         // Old image versions (fetch extra row for nav links)
1220                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1221                         // Fetch the file history
1222                         $this->mHist = array_merge( $this->mHist,
1223                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1224                 }
1225                 $numRows = count( $this->mHist ); // Total number of query results
1226                 if ( $numRows ) {
1227                         # Index value of top item in the list
1228                         $firstIndex = $this->mIsBackwards ?
1229                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1230                         # Discard the extra result row if there is one
1231                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1232                                 if ( $this->mIsBackwards ) {
1233                                         # Index value of item past the index
1234                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1235                                         # Index value of bottom item in the list
1236                                         $lastIndex = $this->mHist[1]->getTimestamp();
1237                                         # Display range
1238                                         $this->mRange = array( 1, $numRows - 1 );
1239                                 } else {
1240                                         # Index value of item past the index
1241                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1242                                         # Index value of bottom item in the list
1243                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1244                                         # Display range
1245                                         $this->mRange = array( 0, $numRows - 2 );
1246                                 }
1247                         } else {
1248                                 # Setting indexes to an empty string means that they will be
1249                                 # omitted if they would otherwise appear in URLs. It just so
1250                                 # happens that this  is the right thing to do in the standard
1251                                 # UI, in all the relevant cases.
1252                                 $this->mPastTheEndIndex = '';
1253                                 # Index value of bottom item in the list
1254                                 $lastIndex = $this->mIsBackwards ?
1255                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1256                                 # Display range
1257                                 $this->mRange = array( 0, $numRows - 1 );
1258                         }
1259                 } else {
1260                         $firstIndex = '';
1261                         $lastIndex = '';
1262                         $this->mPastTheEndIndex = '';
1263                 }
1264                 if ( $this->mIsBackwards ) {
1265                         $this->mIsFirst = ( $numRows < $queryLimit );
1266                         $this->mIsLast = ( $this->mOffset == '' );
1267                         $this->mLastShown = $firstIndex;
1268                         $this->mFirstShown = $lastIndex;
1269                 } else {
1270                         $this->mIsFirst = ( $this->mOffset == '' );
1271                         $this->mIsLast = ( $numRows < $queryLimit );
1272                         $this->mLastShown = $lastIndex;
1273                         $this->mFirstShown = $firstIndex;
1274                 }
1275                 $this->mQueryDone = true;
1276         }
1277
1278         /**
1279          * @param $enable bool
1280          */
1281         protected function preventClickjacking( $enable = true ) {
1282                 $this->preventClickjacking = $enable;
1283         }
1284
1285         /**
1286          * @return bool
1287          */
1288         public function getPreventClickjacking() {
1289                 return $this->preventClickjacking;
1290         }
1291
1292 }