includes/ImagePage.php

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