includes/ImagePage.php

   1 <?php
   2 /**
   3  * Class for viewing MediaWiki file description pages
   4  *
   5  * @ingroup Media
   6  */
   7 class ImagePage extends Article {
   8
   9         /**
  10          * @var File
  11          */
  12         private $displayImg;
  13         /**
  14          * @var FileRepo
  15          */
  16         private $repo;
  17         private $fileLoaded;
  18
  19         var $mExtraDescription = false;
  20
  21         /**
  22          * @param $title Title
  23          * @return WikiFilePage
  24          */
  25         protected function newPage( Title $title ) {
  26                 // Overload mPage with a file-specific page
  27                 return new WikiFilePage( $title );
  28         }
  29
  30         /**
  31          * Constructor from a page id
  32          * @param $id Int article ID to load
  33          */
  34         public static function newFromID( $id ) {
  35                 $t = Title::newFromID( $id );
  36                 # @todo FIXME: Doesn't inherit right
  37                 return $t == null ? null : new self( $t );
  38                 # return $t == null ? null : new static( $t ); // PHP 5.3
  39         }
  40
  41         /**
  42          * @param $file File:
  43          * @return void
  44          */
  45         public function setFile( $file ) {
  46                 $this->mPage->setFile( $file );
  47                 $this->displayImg = $file;
  48                 $this->fileLoaded = true;
  49         }
  50
  51         protected function loadFile() {
  52                 if ( $this->fileLoaded ) {
  53                         return true;
  54                 }
  55                 $this->fileLoaded = true;
  56
  57                 $this->displayImg = $img = false;
  58                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  59                 if ( !$img ) { // not set by hook?
  60                         $img = wfFindFile( $this->getTitle() );
  61                         if ( !$img ) {
  62                                 $img = wfLocalFile( $this->getTitle() );
  63                         }
  64                 }
  65                 $this->mPage->setFile( $img );
  66                 if ( !$this->displayImg ) { // not set by hook?
  67                         $this->displayImg = $img;
  68                 }
  69                 $this->repo = $img->getRepo();
  70         }
  71
  72         /**
  73          * Handler for action=render
  74          * Include body text only; none of the image extras
  75          */
  76         public function render() {
  77                 global $wgOut;
  78                 $wgOut->setArticleBodyOnly( true );
  79                 parent::view();
  80         }
  81
  82         public function view() {
  83                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  84
  85                 $diff = $wgRequest->getVal( 'diff' );
  86                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  87
  88                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  89                         return parent::view();
  90                 }
  91
  92                 $this->loadFile();
  93
  94                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
  95                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || isset( $diff ) ) {
  96                                 // mTitle is the same as the redirect target so ask Article
  97                                 // to perform the redirect for us.
  98                                 $wgRequest->setVal( 'diffonly', 'true' );
  99                                 return parent::view();
 100                         } else {
 101                                 // mTitle is not the same as the redirect target so it is
 102                                 // probably the redirect page itself. Fake the redirect symbol
 103                                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 104                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 105                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 106                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 107                                 return;
 108                         }
 109                 }
 110
 111                 $this->showRedirectedFromHeader();
 112
 113                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 114                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 115                         $formattedMetadata = $this->displayImg->formatMetadata();
 116                         $showmeta = $formattedMetadata !== false;
 117                 } else {
 118                         $showmeta = false;
 119                 }
 120
 121                 if ( !$diff && $this->displayImg->exists() ) {
 122                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 123                 }
 124
 125                 if ( !$diff ) {
 126                         $this->openShowImage();
 127                 }
 128
 129                 # No need to display noarticletext, we use our own message, output in openShowImage()
 130                 if ( $this->mPage->getID() ) {
 131                         # NS_FILE is in the user language, but this section (the actual wikitext)
 132                         # should be in page content language
 133                         $pageLang = $this->getTitle()->getPageLanguage();
 134                         $wgOut->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 135                                 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
 136                                 'class' => 'mw-content-'.$pageLang->getDir() ) ) );
 137                         parent::view();
 138                         $wgOut->addHTML( Xml::closeElement( 'div' ) );
 139                 } else {
 140                         # Just need to set the right headers
 141                         $wgOut->setArticleFlag( true );
 142                         $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 143                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 144                 }
 145
 146                 # Show shared description, if needed
 147                 if ( $this->mExtraDescription ) {
 148                         $fol = wfMessage( 'shareddescriptionfollows' );
 149                         if ( !$fol->isDisabled() ) {
 150                                 $wgOut->addWikiText( $fol->plain() );
 151                         }
 152                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 153                 }
 154
 155                 $this->closeShowImage();
 156                 $this->imageHistory();
 157                 // TODO: Cleanup the following
 158
 159                 $wgOut->addHTML( Xml::element( 'h2',
 160                         array( 'id' => 'filelinks' ),
 161                         wfMsg( 'imagelinks' ) ) . "\n" );
 162                 $this->imageDupes();
 163                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 164                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 165                 $this->imageLinks();
 166
 167                 # Allow extensions to add something after the image links
 168                 $html = '';
 169                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 170                 if ( $html ) {
 171                         $wgOut->addHTML( $html );
 172                 }
 173
 174                 if ( $showmeta ) {
 175                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 176                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 177                         $wgOut->addModules( array( 'mediawiki.action.view.metadata' ) );
 178                 }
 179
 180                 // Add remote Filepage.css
 181                 if( !$this->repo->isLocal() ) {
 182                         $css = $this->repo->getDescriptionStylesheetUrl();
 183                         if ( $css ) {
 184                                 $wgOut->addStyle( $css );
 185                         }
 186                 }
 187                 // always show the local local Filepage.css, bug 29277
 188                 $wgOut->addModuleStyles( 'filepage' );
 189         }
 190
 191         /**
 192          * @return File
 193          */
 194         public function getDisplayedFile() {
 195                 $this->loadFile();
 196                 return $this->displayImg;
 197         }
 198
 199         /**
 200          * Create the TOC
 201          *
 202          * @param $metadata Boolean: whether or not to show the metadata link
 203          * @return String
 204          */
 205         protected function showTOC( $metadata ) {
 206                 $r = array(
 207                         '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 208                         '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 209                         '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 210                 );
 211                 if ( $metadata ) {
 212                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 213                 }
 214
 215                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 216
 217                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 218         }
 219
 220         /**
 221          * Make a table with metadata to be shown in the output page.
 222          *
 223          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 224          *
 225          * @param $metadata Array: the array containing the EXIF data
 226          * @return String The metadata table. This is treated as Wikitext (!)
 227          */
 228         protected function makeMetadataTable( $metadata ) {
 229                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 230                 $r .= wfMsgNoTrans( 'metadata-help' );
 231                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 232                 foreach ( $metadata as $type => $stuff ) {
 233                         foreach ( $stuff as $v ) {
 234                                 # @todo FIXME: Why is this using escapeId for a class?!
 235                                 $class = Sanitizer::escapeId( $v['id'] );
 236                                 if ( $type == 'collapsed' ) {
 237                                         $class .= ' collapsable';
 238                                 }
 239                                 $r .= "<tr class=\"$class\">\n";
 240                                 $r .= "<th>{$v['name']}</th>\n";
 241                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 242                         }
 243                 }
 244                 $r .= "</table>\n</div>\n";
 245                 return $r;
 246         }
 247
 248         /**
 249          * Overloading Article's getContent method.
 250          *
 251          * Omit noarticletext if sharedupload; text will be fetched from the
 252          * shared upload server if possible.
 253          * @return string
 254          */
 255         public function getContent() {
 256                 $this->loadFile();
 257                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 258                         return '';
 259                 }
 260                 return parent::getContent();
 261         }
 262
 263         protected function openShowImage() {
 264                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 265                         $wgLang, $wgEnableUploads, $wgSend404Code;
 266
 267                 $this->loadFile();
 268
 269                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 270                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 271                         $sizeSel = User::getDefaultOption( 'imagesize' );
 272
 273                         // The user offset might still be incorrect, specially if
 274                         // $wgImageLimits got changed (see bug #8858).
 275                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 276                                 // Default to the first offset in $wgImageLimits
 277                                 $sizeSel = 0;
 278                         }
 279                 }
 280                 $max = $wgImageLimits[$sizeSel];
 281                 $maxWidth = $max[0];
 282                 $maxHeight = $max[1];
 283                 $dirmark = $wgLang->getDirMark();
 284
 285                 if ( $this->displayImg->exists() ) {
 286                         # image
 287                         $page = $wgRequest->getIntOrNull( 'page' );
 288                         if ( is_null( $page ) ) {
 289                                 $params = array();
 290                                 $page = 1;
 291                         } else {
 292                                 $params = array( 'page' => $page );
 293                         }
 294                         $width_orig = $this->displayImg->getWidth( $page );
 295                         $width = $width_orig;
 296                         $height_orig = $this->displayImg->getHeight( $page );
 297                         $height = $height_orig;
 298
 299                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 300
 301                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 302
 303                         if ( $this->displayImg->allowInlineDisplay() ) {
 304                                 # image
 305
 306                                 # "Download high res version" link below the image
 307                                 # $msgsize = wfMsgHtml( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime );
 308                                 # We'll show a thumbnail of this image
 309                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 310                                         # Calculate the thumbnail size.
 311                                         # First case, the limiting factor is the width, not the height.
 312                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 313                                                 $height = round( $height * $maxWidth / $width );
 314                                                 $width = $maxWidth;
 315                                                 # Note that $height <= $maxHeight now.
 316                                         } else {
 317                                                 $newwidth = floor( $width * $maxHeight / $height );
 318                                                 $height = round( $height * $newwidth / $width );
 319                                                 $width = $newwidth;
 320                                                 # Note that $height <= $maxHeight now, but might not be identical
 321                                                 # because of rounding.
 322                                         }
 323                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 324                                         $otherSizes = array();
 325                                         foreach ( $wgImageLimits as $size ) {
 326                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig &&
 327                                                                 $size[0] != $width && $size[1] != $height ) {
 328                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 329                                                 }
 330                                         }
 331                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 332                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 333                                                 parse();
 334                                         if ( count( $otherSizes ) && $this->displayImg->getRepo()->canTransformVia404() ) {
 335                                                 $msgsmall .= ' ' .
 336                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 337                                                         wfMessage( 'show-big-image-other' )->rawParams( $wgLang->pipeList( $otherSizes ) )->
 338                                                         params( count( $otherSizes ) )->parse()
 339                                                 );
 340                                         }
 341                                 } elseif ( $width == 0 && $height == 0 ){
 342                                         # Some sort of audio file that doesn't have dimensions
 343                                         # Don't output a no hi res message for such a file
 344                                         $msgsmall = '';
 345                                 } else {
 346                                         # Image is small enough to show full size on image page
 347                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 348                                 }
 349
 350                                 $params['width'] = $width;
 351                                 $params['height'] = $height;
 352                                 $thumbnail = $this->displayImg->transform( $params );
 353
 354                                 $showLink = true;
 355                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 356
 357                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 358                                 if ( $isMulti ) {
 359                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 360                                 }
 361
 362                                 if ( $thumbnail ) {
 363                                         $options = array(
 364                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 365                                                 'file-link' => true,
 366                                         );
 367                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 368                                                 $thumbnail->toHtml( $options ) .
 369                                                 $anchorclose . "</div>\n" );
 370                                 }
 371
 372                                 if ( $isMulti ) {
 373                                         $count = $this->displayImg->pageCount();
 374
 375                                         if ( $page > 1 ) {
 376                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 377                                                 $link = Linker::link(
 378                                                         $this->getTitle(),
 379                                                         $label,
 380                                                         array(),
 381                                                         array( 'page' => $page - 1 ),
 382                                                         array( 'known', 'noclasses' )
 383                                                 );
 384                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 385                                                         array( 'page' => $page - 1 ) );
 386                                         } else {
 387                                                 $thumb1 = '';
 388                                         }
 389
 390                                         if ( $page < $count ) {
 391                                                 $label = wfMsg( 'imgmultipagenext' );
 392                                                 $link = Linker::link(
 393                                                         $this->getTitle(),
 394                                                         $label,
 395                                                         array(),
 396                                                         array( 'page' => $page + 1 ),
 397                                                         array( 'known', 'noclasses' )
 398                                                 );
 399                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 400                                                         array( 'page' => $page + 1 ) );
 401                                         } else {
 402                                                 $thumb2 = '';
 403                                         }
 404
 405                                         global $wgScript;
 406
 407                                         $formParams = array(
 408                                                 'name' => 'pageselector',
 409                                                 'action' => $wgScript,
 410                                                 'onchange' => 'document.pageselector.submit();',
 411                                         );
 412                                         $options = array();
 413                                         for ( $i = 1; $i <= $count; $i++ ) {
 414                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 415                                         }
 416                                         $select = Xml::tags( 'select',
 417                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 418                                                 implode( "\n", $options ) );
 419
 420                                         $wgOut->addHTML(
 421                                                 '</td><td><div class="multipageimagenavbox">' .
 422                                                 Xml::openElement( 'form', $formParams ) .
 423                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 424                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 425                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 426                                                 Xml::closeElement( 'form' ) .
 427                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 428                                         );
 429                                 }
 430                         } else {
 431                                 # if direct link is allowed but it's not a renderable image, show an icon.
 432                                 if ( $this->displayImg->isSafeFile() ) {
 433                                         $icon = $this->displayImg->iconThumb();
 434
 435                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 436                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 437                                                 "</div>\n" );
 438                                 }
 439
 440                                 $showLink = true;
 441                         }
 442
 443                         if ( $showLink ) {
 444                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 445                                 $linktext = $filename;
 446                                 if ( isset( $msgbig ) ) {
 447                                         $linktext = wfEscapeWikiText( $msgbig );
 448                                 }
 449                                 $medialink = "[[Media:$filename|$linktext]]";
 450
 451                                 if ( !$this->displayImg->isSafeFile() ) {
 452                                         $warning = wfMsgNoTrans( 'mediawarning' );
 453                                         $wgOut->addWikiText( <<<EOT
 454 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 455 <div class="mediaWarning">$warning</div>
 456 EOT
 457                                                 );
 458                                 } else {
 459                                         $wgOut->addWikiText( <<<EOT
 460 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 461 </div>
 462 EOT
 463                                         );
 464                                 }
 465                         }
 466
 467                         if ( !$this->displayImg->isLocal() ) {
 468                                 $this->printSharedImageText();
 469                         }
 470                 } else {
 471                         # Image does not exist
 472                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 473                                 // Only show an upload link if the user can upload
 474                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 475                                 $nofile = array(
 476                                         'filepage-nofile-link',
 477                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 478                                 );
 479                         } else {
 480                                 $nofile = 'filepage-nofile';
 481                         }
 482                         // Note, if there is an image description page, but
 483                         // no image, then this setRobotPolicy is overriden
 484                         // by Article::View().
 485                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 486                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 487                         if ( !$this->getID() && $wgSend404Code ) {
 488                                 // If there is no image, no shared image, and no description page,
 489                                 // output a 404, to be consistent with articles.
 490                                 $wgRequest->response()->header( 'HTTP/1.1 404 Not Found' );
 491                         }
 492                 }
 493                 $wgOut->setFileVersion( $this->displayImg );
 494         }
 495
 496         /**
 497          * Creates an thumbnail of specified size and returns an HTML link to it
 498          * @param $params array Scaler parameters
 499          * @param $width int
 500          * @param $height int
 501          * @return string
 502          */
 503         private function makeSizeLink( $params, $width, $height ) {
 504                 $params['width'] = $width;
 505                 $params['height'] = $height;
 506                 $thumbnail = $this->displayImg->transform( $params );
 507                 if ( $thumbnail && !$thumbnail->isError() ) {
 508                         return Html::rawElement( 'a', array(
 509                                 'href' => $thumbnail->getUrl(),
 510                                 'class' => 'mw-thumbnail-link'
 511                                 ), wfMessage( 'show-big-image-size' )->numParams(
 512                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 513                                 )->parse() );
 514                 } else {
 515                         return '';
 516                 }
 517         }
 518
 519         /**
 520          * Show a notice that the file is from a shared repository
 521          */
 522         protected function printSharedImageText() {
 523                 global $wgOut;
 524
 525                 $this->loadFile();
 526
 527                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 528                 $descText = $this->mPage->getFile()->getDescriptionText();
 529
 530                 /* Add canonical to head if there is no local page for this shared file */
 531                 if( $descUrl && $this->mPage->getID() == 0 ) {
 532                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 533                 }
 534
 535                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 536                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 537
 538                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 539                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 540                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 541                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 542                 } else {
 543                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 544                 }
 545
 546                 if ( $descText ) {
 547                         $this->mExtraDescription = $descText;
 548                 }
 549         }
 550
 551         public function getUploadUrl() {
 552                 $this->loadFile();
 553                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 554                 return $uploadTitle->getFullURL( array(
 555                         'wpDestFile' => $this->mPage->getFile()->getName(),
 556                         'wpForReUpload' => 1
 557                  ) );
 558         }
 559
 560         /**
 561          * Print out the various links at the bottom of the image page, e.g. reupload,
 562          * external editing (and instructions link) etc.
 563          */
 564         protected function uploadLinksBox() {
 565                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 566
 567                 if ( !$wgEnableUploads ) {
 568                         return;
 569                 }
 570
 571                 $this->loadFile();
 572                 if ( !$this->mPage->getFile()->isLocal() ) {
 573                         return;
 574                 }
 575
 576                 $wgOut->addHTML( "<br /><ul>\n" );
 577
 578                 # "Upload a new version of this file" link
 579                 if ( UploadBase::userCanReUpload( $wgUser, $this->mPage->getFile()->name ) ) {
 580                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 581                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 582                 }
 583
 584                 # External editing link
 585                 if ( $wgUseExternalEditor ) {
 586                         $elink = Linker::link(
 587                                 $this->getTitle(),
 588                                 wfMsgHtml( 'edit-externally' ),
 589                                 array(),
 590                                 array(
 591                                         'action' => 'edit',
 592                                         'externaledit' => 'true',
 593                                         'mode' => 'file'
 594                                 ),
 595                                 array( 'known', 'noclasses' )
 596                         );
 597                         $wgOut->addHTML(
 598                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 599                                 wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) .
 600                                 "</small></li>\n"
 601                         );
 602                 }
 603
 604                 $wgOut->addHTML( "</ul>\n" );
 605         }
 606
 607         protected function closeShowImage() { } # For overloading
 608
 609         /**
 610          * If the page we've just displayed is in the "Image" namespace,
 611          * we follow it with an upload history of the image and its usage.
 612          */
 613         protected function imageHistory() {
 614                 global $wgOut;
 615
 616                 $this->loadFile();
 617                 $pager = new ImageHistoryPseudoPager( $this );
 618                 $wgOut->addHTML( $pager->getBody() );
 619                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 620
 621                 $this->mPage->getFile()->resetHistory(); // free db resources
 622
 623                 # Exist check because we don't want to show this on pages where an image
 624                 # doesn't exist along with the noimage message, that would suck. -ævar
 625                 if ( $this->mPage->getFile()->exists() ) {
 626                         $this->uploadLinksBox();
 627                 }
 628         }
 629
 630         /**
 631          * @param $target
 632          * @param $limit
 633          * @return ResultWrapper
 634          */
 635         protected function queryImageLinks( $target, $limit ) {
 636                 $dbr = wfGetDB( DB_SLAVE );
 637
 638                 return $dbr->select(
 639                         array( 'imagelinks', 'page' ),
 640                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 641                         array( 'il_to' => $target, 'il_from = page_id' ),
 642                         __METHOD__,
 643                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 644                 );
 645         }
 646
 647         protected function imageLinks() {
 648                 global $wgOut, $wgLang;
 649
 650                 $limit = 100;
 651
 652                 $res = $this->queryImageLinks( $this->getTitle()->getDbKey(), $limit + 1);
 653                 $rows = array();
 654                 $redirects = array();
 655                 foreach ( $res as $row ) {
 656                         if ( $row->page_is_redirect ) {
 657                                 $redirects[$row->page_title] = array();
 658                         }
 659                         $rows[] = $row;
 660                 }
 661                 $count = count( $rows );
 662
 663                 $hasMore = $count > $limit;
 664                 if ( !$hasMore && count( $redirects ) ) {
 665                         $res = $this->queryImageLinks( array_keys( $redirects ),
 666                                 $limit - count( $rows ) + 1 );
 667                         foreach ( $res as $row ) {
 668                                 $redirects[$row->il_to][] = $row;
 669                                 $count++;
 670                         }
 671                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 672                 }
 673
 674                 if ( $count == 0 ) {
 675                         $wgOut->wrapWikiMsg(
 676                                 Html::rawElement( 'div',
 677                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 678                                 'nolinkstoimage'
 679                         );
 680                         return;
 681                 }
 682
 683                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 684                 if ( !$hasMore ) {
 685                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 686                 } else {
 687                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 688                         $wgOut->addWikiMsg( 'linkstoimage-more',
 689                                 $wgLang->formatNum( $limit ),
 690                                 $this->getTitle()->getPrefixedDBkey()
 691                         );
 692                 }
 693
 694                 $wgOut->addHTML(
 695                         Html::openElement( 'ul',
 696                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 697                 );
 698                 $count = 0;
 699
 700                 // Sort the list by namespace:title
 701                 usort( $rows, array( $this, 'compare' ) );
 702
 703                 // Create links for every element
 704                 $currentCount = 0;
 705                 foreach( $rows as $element ) {
 706                         $currentCount++;
 707                         if ( $currentCount > $limit ) {
 708                                 break;
 709                         }
 710
 711                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 712                         if ( !isset( $redirects[$element->page_title] ) ) {
 713                                 $liContents = $link;
 714                         } else {
 715                                 $ul = "<ul class='mw-imagepage-redirectstofile'>\n";
 716                                 foreach ( $redirects[$element->page_title] as $row ) {
 717                                         $currentCount++;
 718                                         if ( $currentCount > $limit ) {
 719                                                 break;
 720                                         }
 721
 722                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 723                                         $ul .= Html::rawElement(
 724                                                 'li',
 725                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 726                                                 $link2
 727                                                 ) . "\n";
 728                                 }
 729                                 $ul .= '</ul>';
 730                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 731                                         $link, $ul )->parse();
 732                         }
 733                         $wgOut->addHTML( Html::rawElement(
 734                                         'li',
 735                                         array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 736                                         $liContents
 737                                 ) . "\n"
 738                         );
 739
 740                 };
 741                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 742                 $res->free();
 743
 744                 // Add a links to [[Special:Whatlinkshere]]
 745                 if ( $count > $limit ) {
 746                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 747                 }
 748                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 749         }
 750
 751         protected function imageDupes() {
 752                 global $wgOut, $wgLang;
 753
 754                 $this->loadFile();
 755
 756                 $dupes = $this->mPage->getDuplicates();
 757                 if ( count( $dupes ) == 0 ) {
 758                         return;
 759                 }
 760
 761                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 762                 $wgOut->addWikiMsg( 'duplicatesoffile',
 763                         $wgLang->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 764                 );
 765                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 766
 767                 /**
 768                  * @var $file File
 769                  */
 770                 foreach ( $dupes as $file ) {
 771                         $fromSrc = '';
 772                         if ( $file->isLocal() ) {
 773                                 $link = Linker::link(
 774                                         $file->getTitle(),
 775                                         null,
 776                                         array(),
 777                                         array(),
 778                                         array( 'known', 'noclasses' )
 779                                 );
 780                         } else {
 781                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 782                                         $file->getTitle()->getPrefixedText() );
 783                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 784                         }
 785                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 786                 }
 787                 $wgOut->addHTML( "</ul></div>\n" );
 788         }
 789
 790         /**
 791          * Delete the file, or an earlier version of it
 792          */
 793         public function delete() {
 794                 $file = $this->mPage->getFile();
 795                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 796                         // Standard article deletion
 797                         parent::delete();
 798                         return;
 799                 }
 800
 801                 $deleter = new FileDeleteForm( $file );
 802                 $deleter->execute();
 803         }
 804
 805         /**
 806          * Display an error with a wikitext description
 807          *
 808          * @param $description String
 809          */
 810         function showError( $description ) {
 811                 global $wgOut;
 812                 $wgOut->setPageTitle( wfMessage( 'internalerror' ) );
 813                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 814                 $wgOut->setArticleRelated( false );
 815                 $wgOut->enableClientCache( false );
 816                 $wgOut->addWikiText( $description );
 817         }
 818
 819         /**
 820          * Callback for usort() to do link sorts by (namespace, title)
 821          * Function copied from Title::compare()
 822          *
 823          * @param $a object page to compare with
 824          * @param $b object page to compare with
 825          * @return Integer: result of string comparison, or namespace comparison
 826          */
 827         protected function compare( $a, $b ) {
 828                 if ( $a->page_namespace == $b->page_namespace ) {
 829                         return strcmp( $a->page_title, $b->page_title );
 830                 } else {
 831                         return $a->page_namespace - $b->page_namespace;
 832                 }
 833         }
 834 }
 835
 836 /**
 837  * Builds the image revision log shown on image pages
 838  *
 839  * @ingroup Media
 840  */
 841 class ImageHistoryList {
 842
 843         /**
 844          * @var Title
 845          */
 846         protected $title;
 847
 848         /**
 849          * @var File
 850          */
 851         protected $img;
 852
 853         /**
 854          * @var ImagePage
 855          */
 856         protected $imagePage;
 857
 858         /**
 859          * @var File
 860          */
 861         protected $current;
 862
 863         protected $repo, $showThumb;
 864         protected $preventClickjacking = false;
 865
 866         /**
 867          * @param ImagePage $imagePage
 868          */
 869         public function __construct( $imagePage ) {
 870                 global $wgShowArchiveThumbnails;
 871                 $this->current = $imagePage->getFile();
 872                 $this->img = $imagePage->getDisplayedFile();
 873                 $this->title = $imagePage->getTitle();
 874                 $this->imagePage = $imagePage;
 875                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 876         }
 877
 878         /**
 879          * @return ImagePage
 880          */
 881         public function getImagePage() {
 882                 return $this->imagePage;
 883         }
 884
 885         /**
 886          * @return File
 887          */
 888         public function getFile() {
 889                 return $this->img;
 890         }
 891
 892         /**
 893          * @param $navLinks string
 894          * @return string
 895          */
 896         public function beginImageHistoryList( $navLinks = '' ) {
 897                 global $wgOut, $wgUser;
 898                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 899                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 900                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 901                         . $navLinks . "\n"
 902                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 903                         . '<tr><td></td>'
 904                         . ( $this->current->isLocal() && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 905                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 906                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 907                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 908                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 909                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 910                         . "</tr>\n";
 911         }
 912
 913         /**
 914          * @param $navLinks string
 915          * @return string
 916          */
 917         public function endImageHistoryList( $navLinks = '' ) {
 918                 return "</table>\n$navLinks\n</div>\n";
 919         }
 920
 921         /**
 922          * @param $iscur
 923          * @param $file File
 924          * @return string
 925          */
 926         public function imageHistoryLine( $iscur, $file ) {
 927                 global $wgUser, $wgLang, $wgContLang;
 928
 929                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 930                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 931                 $user = $file->getUser( 'id' );
 932                 $usertext = $file->getUser( 'text' );
 933                 $description = $file->getDescription();
 934
 935                 $local = $this->current->isLocal();
 936                 $row = $selected = '';
 937
 938                 // Deletion link
 939                 if ( $local && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
 940                         $row .= '<td>';
 941                         # Link to remove from history
 942                         if ( $wgUser->isAllowed( 'delete' ) ) {
 943                                 $q = array( 'action' => 'delete' );
 944                                 if ( !$iscur ) {
 945                                         $q['oldimage'] = $img;
 946                                 }
 947                                 $row .= Linker::link(
 948                                         $this->title,
 949                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 950                                         array(), $q, array( 'known' )
 951                                 );
 952                         }
 953                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 954                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 955                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 956                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 957                                         $row .= '<br />';
 958                                 }
 959                                 // If file is top revision or locked from this user, don't link
 960                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 961                                         $del = Linker::revDeleteLinkDisabled( $canHide );
 962                                 } else {
 963                                         list( $ts, $name ) = explode( '!', $img, 2 );
 964                                         $query = array(
 965                                                 'type'   => 'oldimage',
 966                                                 'target' => $this->title->getPrefixedText(),
 967                                                 'ids'    => $ts,
 968                                         );
 969                                         $del = Linker::revDeleteLink( $query,
 970                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 971                                 }
 972                                 $row .= $del;
 973                         }
 974                         $row .= '</td>';
 975                 }
 976
 977                 // Reversion link/current indicator
 978                 $row .= '<td>';
 979                 if ( $iscur ) {
 980                         $row .= wfMsgHtml( 'filehist-current' );
 981                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 982                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 983                                 $row .= wfMsgHtml( 'filehist-revert' );
 984                         } else {
 985                                 $row .= Linker::link(
 986                                         $this->title,
 987                                         wfMsgHtml( 'filehist-revert' ),
 988                                         array(),
 989                                         array(
 990                                                 'action' => 'revert',
 991                                                 'oldimage' => $img,
 992                                                 'wpEditToken' => $wgUser->getEditToken( $img )
 993                                         ),
 994                                         array( 'known', 'noclasses' )
 995                                 );
 996                         }
 997                 }
 998                 $row .= '</td>';
 999
1000                 // Date/time and image link
1001                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1002                         $selected = "class='filehistory-selected'";
1003                 }
1004                 $row .= "<td $selected style='white-space: nowrap;'>";
1005                 if ( !$file->userCan( File::DELETED_FILE ) ) {
1006                         # Don't link to unviewable files
1007                         $row .= '<span class="history-deleted">' . $wgLang->timeanddate( $timestamp, true ) . '</span>';
1008                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1009                         if ( $local ) {
1010                                 $this->preventClickjacking();
1011                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1012                                 # Make a link to review the image
1013                                 $url = Linker::link(
1014                                         $revdel,
1015                                         $wgLang->timeanddate( $timestamp, true ),
1016                                         array(),
1017                                         array(
1018                                                 'target' => $this->title->getPrefixedText(),
1019                                                 'file' => $img,
1020                                                 'token' => $wgUser->getEditToken( $img )
1021                                         ),
1022                                         array( 'known', 'noclasses' )
1023                                 );
1024                         } else {
1025                                 $url = $wgLang->timeanddate( $timestamp, true );
1026                         }
1027                         $row .= '<span class="history-deleted">' . $url . '</span>';
1028                 } else {
1029                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1030                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeanddate( $timestamp, true ) );
1031                 }
1032                 $row .= "</td>";
1033
1034                 // Thumbnail
1035                 if ( $this->showThumb ) {
1036                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1037                 }
1038
1039                 // Image dimensions + size
1040                 $row .= '<td>';
1041                 $row .= htmlspecialchars( $file->getDimensionsString() );
1042                 $row .= ' <span style="white-space: nowrap;">(' . Linker::formatSize( $file->getSize() ) . ')</span>';
1043                 $row .= '</td>';
1044
1045                 // Uploading user
1046                 $row .= '<td>';
1047                 // Hide deleted usernames
1048                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1049                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1050                 } else {
1051                         if ( $local ) {
1052                                 $row .= Linker::userLink( $user, $usertext ) . ' <span style="white-space: nowrap;">' .
1053                                 Linker::userToolLinks( $user, $usertext ) . '</span>';
1054                         } else {
1055                                 $row .= htmlspecialchars( $usertext );
1056                         }
1057                 }
1058                 $row .= '</td>';
1059
1060                 // Don't show deleted descriptions
1061                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1062                         $row .= '<td><span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></td>';
1063                 } else {
1064                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1065                 }
1066
1067                 $rowClass = null;
1068                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1069                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1070
1071                 return "<tr{$classAttr}>{$row}</tr>\n";
1072         }
1073
1074         /**
1075          * @param $file File
1076          * @return string
1077          */
1078         protected function getThumbForLine( $file ) {
1079                 global $wgLang;
1080
1081                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1082                         $params = array(
1083                                 'width' => '120',
1084                                 'height' => '120',
1085                         );
1086                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1087
1088                         $thumbnail = $file->transform( $params );
1089                         $options = array(
1090                                 'alt' => wfMsg( 'filehist-thumbtext',
1091                                         $wgLang->timeanddate( $timestamp, true ),
1092                                         $wgLang->date( $timestamp, true ),
1093                                         $wgLang->time( $timestamp, true ) ),
1094                                 'file-link' => true,
1095                         );
1096
1097                         if ( !$thumbnail ) {
1098                                 return wfMsgHtml( 'filehist-nothumb' );
1099                         }
1100
1101                         return $thumbnail->toHtml( $options );
1102                 } else {
1103                         return wfMsgHtml( 'filehist-nothumb' );
1104                 }
1105         }
1106
1107         /**
1108          * @param $enable bool
1109          */
1110         protected function preventClickjacking( $enable = true ) {
1111                 $this->preventClickjacking = $enable;
1112         }
1113
1114         /**
1115          * @return bool
1116          */
1117         public function getPreventClickjacking() {
1118                 return $this->preventClickjacking;
1119         }
1120 }
1121
1122 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1123         protected $preventClickjacking = false;
1124
1125         /**
1126          * @var File
1127          */
1128         protected $mImg;
1129
1130         /**
1131          * @var Title
1132          */
1133         protected $mTitle;
1134
1135         /**
1136          * @param ImagePage $imagePage
1137          */
1138         function __construct( $imagePage ) {
1139                 parent::__construct();
1140                 $this->mImagePage = $imagePage;
1141                 $this->mTitle = clone ( $imagePage->getTitle() );
1142                 $this->mTitle->setFragment( '#filehistory' );
1143                 $this->mImg = null;
1144                 $this->mHist = array();
1145                 $this->mRange = array( 0, 0 ); // display range
1146         }
1147
1148         /**
1149          * @return Title
1150          */
1151         function getTitle() {
1152                 return $this->mTitle;
1153         }
1154
1155         function getQueryInfo() {
1156                 return false;
1157         }
1158
1159         /**
1160          * @return string
1161          */
1162         function getIndexField() {
1163                 return '';
1164         }
1165
1166         /**
1167          * @return string
1168          */
1169         function formatRow( $row ) {
1170                 return '';
1171         }
1172
1173         /**
1174          * @return string
1175          */
1176         function getBody() {
1177                 $s = '';
1178                 $this->doQuery();
1179                 if ( count( $this->mHist ) ) {
1180                         $list = new ImageHistoryList( $this->mImagePage );
1181                         # Generate prev/next links
1182                         $navLink = $this->getNavigationBar();
1183                         $s = $list->beginImageHistoryList( $navLink );
1184                         // Skip rows there just for paging links
1185                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1186                                 $file = $this->mHist[$i];
1187                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1188                         }
1189                         $s .= $list->endImageHistoryList( $navLink );
1190
1191                         if ( $list->getPreventClickjacking() ) {
1192                                 $this->preventClickjacking();
1193                         }
1194                 }
1195                 return $s;
1196         }
1197
1198         function doQuery() {
1199                 if ( $this->mQueryDone ) {
1200                         return;
1201                 }
1202                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1203                 if ( !$this->mImg->exists() ) {
1204                         return;
1205                 }
1206                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1207                 if ( $this->mIsBackwards ) {
1208                         // Fetch the file history
1209                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1210                         // The current rev may not meet the offset/limit
1211                         $numRows = count( $this->mHist );
1212                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1213                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1214                         }
1215                 } else {
1216                         // The current rev may not meet the offset
1217                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1218                                 $this->mHist[] = $this->mImg;
1219                         }
1220                         // Old image versions (fetch extra row for nav links)
1221                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1222                         // Fetch the file history
1223                         $this->mHist = array_merge( $this->mHist,
1224                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1225                 }
1226                 $numRows = count( $this->mHist ); // Total number of query results
1227                 if ( $numRows ) {
1228                         # Index value of top item in the list
1229                         $firstIndex = $this->mIsBackwards ?
1230                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1231                         # Discard the extra result row if there is one
1232                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1233                                 if ( $this->mIsBackwards ) {
1234                                         # Index value of item past the index
1235                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1236                                         # Index value of bottom item in the list
1237                                         $lastIndex = $this->mHist[1]->getTimestamp();
1238                                         # Display range
1239                                         $this->mRange = array( 1, $numRows - 1 );
1240                                 } else {
1241                                         # Index value of item past the index
1242                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1243                                         # Index value of bottom item in the list
1244                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1245                                         # Display range
1246                                         $this->mRange = array( 0, $numRows - 2 );
1247                                 }
1248                         } else {
1249                                 # Setting indexes to an empty string means that they will be
1250                                 # omitted if they would otherwise appear in URLs. It just so
1251                                 # happens that this  is the right thing to do in the standard
1252                                 # UI, in all the relevant cases.
1253                                 $this->mPastTheEndIndex = '';
1254                                 # Index value of bottom item in the list
1255                                 $lastIndex = $this->mIsBackwards ?
1256                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1257                                 # Display range
1258                                 $this->mRange = array( 0, $numRows - 1 );
1259                         }
1260                 } else {
1261                         $firstIndex = '';
1262                         $lastIndex = '';
1263                         $this->mPastTheEndIndex = '';
1264                 }
1265                 if ( $this->mIsBackwards ) {
1266                         $this->mIsFirst = ( $numRows < $queryLimit );
1267                         $this->mIsLast = ( $this->mOffset == '' );
1268                         $this->mLastShown = $firstIndex;
1269                         $this->mFirstShown = $lastIndex;
1270                 } else {
1271                         $this->mIsFirst = ( $this->mOffset == '' );
1272                         $this->mIsLast = ( $numRows < $queryLimit );
1273                         $this->mLastShown = $lastIndex;
1274                         $this->mFirstShown = $firstIndex;
1275                 }
1276                 $this->mQueryDone = true;
1277         }
1278
1279         /**
1280          * @param $enable bool
1281          */
1282         protected function preventClickjacking( $enable = true ) {
1283                 $this->preventClickjacking = $enable;
1284         }
1285
1286         /**
1287          * @return bool
1288          */
1289         public function getPreventClickjacking() {
1290                 return $this->preventClickjacking;
1291         }
1292
1293 }