includes/ImagePage.php

   1 <?php
   2 /**
   3  * Class for viewing MediaWiki file description pages
   4  *
   5  * @ingroup Media
   6  */
   7 class ImagePage extends Article {
   8
   9         /**
  10          * @var File
  11          */
  12         private $displayImg;
  13         /**
  14          * @var FileRepo
  15          */
  16         private $repo;
  17         private $fileLoaded;
  18
  19         var $mExtraDescription = false;
  20
  21         /**
  22          * @param $title Title
  23          * @return WikiFilePage
  24          */
  25         protected function newPage( Title $title ) {
  26                 // Overload mPage with a file-specific page
  27                 return new WikiFilePage( $title );
  28         }
  29
  30         /**
  31          * Constructor from a page id
  32          * @param $id Int article ID to load
  33          * @returnImagePage|null
  34          */
  35         public static function newFromID( $id ) {
  36                 $t = Title::newFromID( $id );
  37                 # @todo FIXME: Doesn't inherit right
  38                 return $t == null ? null : new self( $t );
  39                 # return $t == null ? null : new static( $t ); // PHP 5.3
  40         }
  41
  42         /**
  43          * @param $file File:
  44          * @return void
  45          */
  46         public function setFile( $file ) {
  47                 $this->mPage->setFile( $file );
  48                 $this->displayImg = $file;
  49                 $this->fileLoaded = true;
  50         }
  51
  52         protected function loadFile() {
  53                 if ( $this->fileLoaded ) {
  54                         return true;
  55                 }
  56                 $this->fileLoaded = true;
  57
  58                 $this->displayImg = $img = false;
  59                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  60                 if ( !$img ) { // not set by hook?
  61                         $img = wfFindFile( $this->getTitle() );
  62                         if ( !$img ) {
  63                                 $img = wfLocalFile( $this->getTitle() );
  64                         }
  65                 }
  66                 $this->mPage->setFile( $img );
  67                 if ( !$this->displayImg ) { // not set by hook?
  68                         $this->displayImg = $img;
  69                 }
  70                 $this->repo = $img->getRepo();
  71         }
  72
  73         /**
  74          * Handler for action=render
  75          * Include body text only; none of the image extras
  76          */
  77         public function render() {
  78                 global $wgOut;
  79                 $wgOut->setArticleBodyOnly( true );
  80                 parent::view();
  81         }
  82
  83         public function view() {
  84                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  85
  86                 $diff = $wgRequest->getVal( 'diff' );
  87                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  88
  89                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  90                         return parent::view();
  91                 }
  92
  93                 $this->loadFile();
  94
  95                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
  96                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || isset( $diff ) ) {
  97                                 // mTitle is the same as the redirect target so ask Article
  98                                 // to perform the redirect for us.
  99                                 $wgRequest->setVal( 'diffonly', 'true' );
 100                                 return parent::view();
 101                         } else {
 102                                 // mTitle is not the same as the redirect target so it is
 103                                 // probably the redirect page itself. Fake the redirect symbol
 104                                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 105                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 106                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 107                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 108                                 return;
 109                         }
 110                 }
 111
 112                 $this->showRedirectedFromHeader();
 113
 114                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 115                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 116                         $formattedMetadata = $this->displayImg->formatMetadata();
 117                         $showmeta = $formattedMetadata !== false;
 118                 } else {
 119                         $showmeta = false;
 120                 }
 121
 122                 if ( !$diff && $this->displayImg->exists() ) {
 123                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 124                 }
 125
 126                 if ( !$diff ) {
 127                         $this->openShowImage();
 128                 }
 129
 130                 # No need to display noarticletext, we use our own message, output in openShowImage()
 131                 if ( $this->mPage->getID() ) {
 132                         # NS_FILE is in the user language, but this section (the actual wikitext)
 133                         # should be in page content language
 134                         $pageLang = $this->getTitle()->getPageLanguage();
 135                         $wgOut->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 136                                 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
 137                                 'class' => 'mw-content-'.$pageLang->getDir() ) ) );
 138                         parent::view();
 139                         $wgOut->addHTML( Xml::closeElement( 'div' ) );
 140                 } else {
 141                         # Just need to set the right headers
 142                         $wgOut->setArticleFlag( true );
 143                         $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 144                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 145                 }
 146
 147                 # Show shared description, if needed
 148                 if ( $this->mExtraDescription ) {
 149                         $fol = wfMessage( 'shareddescriptionfollows' );
 150                         if ( !$fol->isDisabled() ) {
 151                                 $wgOut->addWikiText( $fol->plain() );
 152                         }
 153                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 154                 }
 155
 156                 $this->closeShowImage();
 157                 $this->imageHistory();
 158                 // TODO: Cleanup the following
 159
 160                 $wgOut->addHTML( Xml::element( 'h2',
 161                         array( 'id' => 'filelinks' ),
 162                         wfMsg( 'imagelinks' ) ) . "\n" );
 163                 $this->imageDupes();
 164                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 165                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 166                 $this->imageLinks();
 167
 168                 # Allow extensions to add something after the image links
 169                 $html = '';
 170                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 171                 if ( $html ) {
 172                         $wgOut->addHTML( $html );
 173                 }
 174
 175                 if ( $showmeta ) {
 176                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 177                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 178                         $wgOut->addModules( array( 'mediawiki.action.view.metadata' ) );
 179                 }
 180
 181                 // Add remote Filepage.css
 182                 if( !$this->repo->isLocal() ) {
 183                         $css = $this->repo->getDescriptionStylesheetUrl();
 184                         if ( $css ) {
 185                                 $wgOut->addStyle( $css );
 186                         }
 187                 }
 188                 // always show the local local Filepage.css, bug 29277
 189                 $wgOut->addModuleStyles( 'filepage' );
 190         }
 191
 192         /**
 193          * @return File
 194          */
 195         public function getDisplayedFile() {
 196                 $this->loadFile();
 197                 return $this->displayImg;
 198         }
 199
 200         /**
 201          * Create the TOC
 202          *
 203          * @param $metadata Boolean: whether or not to show the metadata link
 204          * @return String
 205          */
 206         protected function showTOC( $metadata ) {
 207                 $r = array(
 208                         '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 209                         '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 210                         '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 211                 );
 212                 if ( $metadata ) {
 213                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 214                 }
 215
 216                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 217
 218                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 219         }
 220
 221         /**
 222          * Make a table with metadata to be shown in the output page.
 223          *
 224          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 225          *
 226          * @param $metadata Array: the array containing the EXIF data
 227          * @return String The metadata table. This is treated as Wikitext (!)
 228          */
 229         protected function makeMetadataTable( $metadata ) {
 230                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 231                 $r .= wfMsgNoTrans( 'metadata-help' );
 232                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 233                 foreach ( $metadata as $type => $stuff ) {
 234                         foreach ( $stuff as $v ) {
 235                                 # @todo FIXME: Why is this using escapeId for a class?!
 236                                 $class = Sanitizer::escapeId( $v['id'] );
 237                                 if ( $type == 'collapsed' ) {
 238                                         $class .= ' collapsable';
 239                                 }
 240                                 $r .= "<tr class=\"$class\">\n";
 241                                 $r .= "<th>{$v['name']}</th>\n";
 242                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 243                         }
 244                 }
 245                 $r .= "</table>\n</div>\n";
 246                 return $r;
 247         }
 248
 249         /**
 250          * Overloading Article's getContent method.
 251          *
 252          * Omit noarticletext if sharedupload; text will be fetched from the
 253          * shared upload server if possible.
 254          * @return string
 255          */
 256         public function getContent() {
 257                 $this->loadFile();
 258                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 259                         return '';
 260                 }
 261                 return parent::getContent();
 262         }
 263
 264         protected function openShowImage() {
 265                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 266                         $wgLang, $wgEnableUploads, $wgSend404Code;
 267
 268                 $this->loadFile();
 269
 270                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 271                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 272                         $sizeSel = User::getDefaultOption( 'imagesize' );
 273
 274                         // The user offset might still be incorrect, specially if
 275                         // $wgImageLimits got changed (see bug #8858).
 276                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 277                                 // Default to the first offset in $wgImageLimits
 278                                 $sizeSel = 0;
 279                         }
 280                 }
 281                 $max = $wgImageLimits[$sizeSel];
 282                 $maxWidth = $max[0];
 283                 $maxHeight = $max[1];
 284                 $dirmark = $wgLang->getDirMark();
 285
 286                 if ( $this->displayImg->exists() ) {
 287                         # image
 288                         $page = $wgRequest->getIntOrNull( 'page' );
 289                         if ( is_null( $page ) ) {
 290                                 $params = array();
 291                                 $page = 1;
 292                         } else {
 293                                 $params = array( 'page' => $page );
 294                         }
 295                         $width_orig = $this->displayImg->getWidth( $page );
 296                         $width = $width_orig;
 297                         $height_orig = $this->displayImg->getHeight( $page );
 298                         $height = $height_orig;
 299
 300                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 301
 302                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 303
 304                         if ( $this->displayImg->allowInlineDisplay() ) {
 305                                 # image
 306
 307                                 # "Download high res version" link below the image
 308                                 # $msgsize = wfMsgHtml( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime );
 309                                 # We'll show a thumbnail of this image
 310                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 311                                         # Calculate the thumbnail size.
 312                                         # First case, the limiting factor is the width, not the height.
 313                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 314                                                 $height = round( $height * $maxWidth / $width );
 315                                                 $width = $maxWidth;
 316                                                 # Note that $height <= $maxHeight now.
 317                                         } else {
 318                                                 $newwidth = floor( $width * $maxHeight / $height );
 319                                                 $height = round( $height * $newwidth / $width );
 320                                                 $width = $newwidth;
 321                                                 # Note that $height <= $maxHeight now, but might not be identical
 322                                                 # because of rounding.
 323                                         }
 324                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 325                                         $otherSizes = array();
 326                                         foreach ( $wgImageLimits as $size ) {
 327                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig &&
 328                                                                 $size[0] != $width && $size[1] != $height ) {
 329                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 330                                                 }
 331                                         }
 332                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 333                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 334                                                 parse();
 335                                         if ( count( $otherSizes ) && $this->displayImg->getRepo()->canTransformVia404() ) {
 336                                                 $msgsmall .= ' ' .
 337                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 338                                                         wfMessage( 'show-big-image-other' )->rawParams( $wgLang->pipeList( $otherSizes ) )->
 339                                                         params( count( $otherSizes ) )->parse()
 340                                                 );
 341                                         }
 342                                 } elseif ( $width == 0 && $height == 0 ){
 343                                         # Some sort of audio file that doesn't have dimensions
 344                                         # Don't output a no hi res message for such a file
 345                                         $msgsmall = '';
 346                                 } else {
 347                                         # Image is small enough to show full size on image page
 348                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 349                                 }
 350
 351                                 $params['width'] = $width;
 352                                 $params['height'] = $height;
 353                                 $thumbnail = $this->displayImg->transform( $params );
 354
 355                                 $showLink = true;
 356                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 357
 358                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 359                                 if ( $isMulti ) {
 360                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 361                                 }
 362
 363                                 if ( $thumbnail ) {
 364                                         $options = array(
 365                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 366                                                 'file-link' => true,
 367                                         );
 368                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 369                                                 $thumbnail->toHtml( $options ) .
 370                                                 $anchorclose . "</div>\n" );
 371                                 }
 372
 373                                 if ( $isMulti ) {
 374                                         $count = $this->displayImg->pageCount();
 375
 376                                         if ( $page > 1 ) {
 377                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 378                                                 $link = Linker::link(
 379                                                         $this->getTitle(),
 380                                                         $label,
 381                                                         array(),
 382                                                         array( 'page' => $page - 1 ),
 383                                                         array( 'known', 'noclasses' )
 384                                                 );
 385                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 386                                                         array( 'page' => $page - 1 ) );
 387                                         } else {
 388                                                 $thumb1 = '';
 389                                         }
 390
 391                                         if ( $page < $count ) {
 392                                                 $label = wfMsg( 'imgmultipagenext' );
 393                                                 $link = Linker::link(
 394                                                         $this->getTitle(),
 395                                                         $label,
 396                                                         array(),
 397                                                         array( 'page' => $page + 1 ),
 398                                                         array( 'known', 'noclasses' )
 399                                                 );
 400                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 401                                                         array( 'page' => $page + 1 ) );
 402                                         } else {
 403                                                 $thumb2 = '';
 404                                         }
 405
 406                                         global $wgScript;
 407
 408                                         $formParams = array(
 409                                                 'name' => 'pageselector',
 410                                                 'action' => $wgScript,
 411                                                 'onchange' => 'document.pageselector.submit();',
 412                                         );
 413                                         $options = array();
 414                                         for ( $i = 1; $i <= $count; $i++ ) {
 415                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 416                                         }
 417                                         $select = Xml::tags( 'select',
 418                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 419                                                 implode( "\n", $options ) );
 420
 421                                         $wgOut->addHTML(
 422                                                 '</td><td><div class="multipageimagenavbox">' .
 423                                                 Xml::openElement( 'form', $formParams ) .
 424                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 425                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 426                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 427                                                 Xml::closeElement( 'form' ) .
 428                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 429                                         );
 430                                 }
 431                         } else {
 432                                 # if direct link is allowed but it's not a renderable image, show an icon.
 433                                 if ( $this->displayImg->isSafeFile() ) {
 434                                         $icon = $this->displayImg->iconThumb();
 435
 436                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 437                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 438                                                 "</div>\n" );
 439                                 }
 440
 441                                 $showLink = true;
 442                         }
 443
 444                         if ( $showLink ) {
 445                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 446                                 $linktext = $filename;
 447                                 if ( isset( $msgbig ) ) {
 448                                         $linktext = wfEscapeWikiText( $msgbig );
 449                                 }
 450                                 $medialink = "[[Media:$filename|$linktext]]";
 451
 452                                 if ( !$this->displayImg->isSafeFile() ) {
 453                                         $warning = wfMsgNoTrans( 'mediawarning' );
 454                                         $wgOut->addWikiText( <<<EOT
 455 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 456 <div class="mediaWarning">$warning</div>
 457 EOT
 458                                                 );
 459                                 } else {
 460                                         $wgOut->addWikiText( <<<EOT
 461 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 462 </div>
 463 EOT
 464                                         );
 465                                 }
 466                         }
 467
 468                         if ( !$this->displayImg->isLocal() ) {
 469                                 $this->printSharedImageText();
 470                         }
 471                 } else {
 472                         # Image does not exist
 473                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 474                                 // Only show an upload link if the user can upload
 475                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 476                                 $nofile = array(
 477                                         'filepage-nofile-link',
 478                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 479                                 );
 480                         } else {
 481                                 $nofile = 'filepage-nofile';
 482                         }
 483                         // Note, if there is an image description page, but
 484                         // no image, then this setRobotPolicy is overriden
 485                         // by Article::View().
 486                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 487                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 488                         if ( !$this->getID() && $wgSend404Code ) {
 489                                 // If there is no image, no shared image, and no description page,
 490                                 // output a 404, to be consistent with articles.
 491                                 $wgRequest->response()->header( 'HTTP/1.1 404 Not Found' );
 492                         }
 493                 }
 494                 $wgOut->setFileVersion( $this->displayImg );
 495         }
 496
 497         /**
 498          * Creates an thumbnail of specified size and returns an HTML link to it
 499          * @param $params array Scaler parameters
 500          * @param $width int
 501          * @param $height int
 502          * @return string
 503          */
 504         private function makeSizeLink( $params, $width, $height ) {
 505                 $params['width'] = $width;
 506                 $params['height'] = $height;
 507                 $thumbnail = $this->displayImg->transform( $params );
 508                 if ( $thumbnail && !$thumbnail->isError() ) {
 509                         return Html::rawElement( 'a', array(
 510                                 'href' => $thumbnail->getUrl(),
 511                                 'class' => 'mw-thumbnail-link'
 512                                 ), wfMessage( 'show-big-image-size' )->numParams(
 513                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 514                                 )->parse() );
 515                 } else {
 516                         return '';
 517                 }
 518         }
 519
 520         /**
 521          * Show a notice that the file is from a shared repository
 522          */
 523         protected function printSharedImageText() {
 524                 global $wgOut;
 525
 526                 $this->loadFile();
 527
 528                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 529                 $descText = $this->mPage->getFile()->getDescriptionText();
 530
 531                 /* Add canonical to head if there is no local page for this shared file */
 532                 if( $descUrl && $this->mPage->getID() == 0 ) {
 533                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 534                 }
 535
 536                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 537                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 538
 539                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 540                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 541                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 542                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 543                 } else {
 544                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 545                 }
 546
 547                 if ( $descText ) {
 548                         $this->mExtraDescription = $descText;
 549                 }
 550         }
 551
 552         public function getUploadUrl() {
 553                 $this->loadFile();
 554                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 555                 return $uploadTitle->getFullURL( array(
 556                         'wpDestFile' => $this->mPage->getFile()->getName(),
 557                         'wpForReUpload' => 1
 558                  ) );
 559         }
 560
 561         /**
 562          * Print out the various links at the bottom of the image page, e.g. reupload,
 563          * external editing (and instructions link) etc.
 564          */
 565         protected function uploadLinksBox() {
 566                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 567
 568                 if ( !$wgEnableUploads ) {
 569                         return;
 570                 }
 571
 572                 $this->loadFile();
 573                 if ( !$this->mPage->getFile()->isLocal() ) {
 574                         return;
 575                 }
 576
 577                 $wgOut->addHTML( "<br /><ul>\n" );
 578
 579                 # "Upload a new version of this file" link
 580                 if ( UploadBase::userCanReUpload( $wgUser, $this->mPage->getFile()->name ) ) {
 581                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 582                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 583                 }
 584
 585                 # External editing link
 586                 if ( $wgUseExternalEditor ) {
 587                         $elink = Linker::link(
 588                                 $this->getTitle(),
 589                                 wfMsgHtml( 'edit-externally' ),
 590                                 array(),
 591                                 array(
 592                                         'action' => 'edit',
 593                                         'externaledit' => 'true',
 594                                         'mode' => 'file'
 595                                 ),
 596                                 array( 'known', 'noclasses' )
 597                         );
 598                         $wgOut->addHTML(
 599                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 600                                 wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) .
 601                                 "</small></li>\n"
 602                         );
 603                 }
 604
 605                 $wgOut->addHTML( "</ul>\n" );
 606         }
 607
 608         protected function closeShowImage() { } # For overloading
 609
 610         /**
 611          * If the page we've just displayed is in the "Image" namespace,
 612          * we follow it with an upload history of the image and its usage.
 613          */
 614         protected function imageHistory() {
 615                 global $wgOut;
 616
 617                 $this->loadFile();
 618                 $pager = new ImageHistoryPseudoPager( $this );
 619                 $wgOut->addHTML( $pager->getBody() );
 620                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 621
 622                 $this->mPage->getFile()->resetHistory(); // free db resources
 623
 624                 # Exist check because we don't want to show this on pages where an image
 625                 # doesn't exist along with the noimage message, that would suck. -ævar
 626                 if ( $this->mPage->getFile()->exists() ) {
 627                         $this->uploadLinksBox();
 628                 }
 629         }
 630
 631         /**
 632          * @param $target
 633          * @param $limit
 634          * @return ResultWrapper
 635          */
 636         protected function queryImageLinks( $target, $limit ) {
 637                 $dbr = wfGetDB( DB_SLAVE );
 638
 639                 return $dbr->select(
 640                         array( 'imagelinks', 'page' ),
 641                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 642                         array( 'il_to' => $target, 'il_from = page_id' ),
 643                         __METHOD__,
 644                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 645                 );
 646         }
 647
 648         protected function imageLinks() {
 649                 global $wgOut, $wgLang;
 650
 651                 $limit = 100;
 652
 653                 $res = $this->queryImageLinks( $this->getTitle()->getDbKey(), $limit + 1);
 654                 $rows = array();
 655                 $redirects = array();
 656                 foreach ( $res as $row ) {
 657                         if ( $row->page_is_redirect ) {
 658                                 $redirects[$row->page_title] = array();
 659                         }
 660                         $rows[] = $row;
 661                 }
 662                 $count = count( $rows );
 663
 664                 $hasMore = $count > $limit;
 665                 if ( !$hasMore && count( $redirects ) ) {
 666                         $res = $this->queryImageLinks( array_keys( $redirects ),
 667                                 $limit - count( $rows ) + 1 );
 668                         foreach ( $res as $row ) {
 669                                 $redirects[$row->il_to][] = $row;
 670                                 $count++;
 671                         }
 672                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 673                 }
 674
 675                 if ( $count == 0 ) {
 676                         $wgOut->wrapWikiMsg(
 677                                 Html::rawElement( 'div',
 678                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 679                                 'nolinkstoimage'
 680                         );
 681                         return;
 682                 }
 683
 684                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 685                 if ( !$hasMore ) {
 686                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 687                 } else {
 688                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 689                         $wgOut->addWikiMsg( 'linkstoimage-more',
 690                                 $wgLang->formatNum( $limit ),
 691                                 $this->getTitle()->getPrefixedDBkey()
 692                         );
 693                 }
 694
 695                 $wgOut->addHTML(
 696                         Html::openElement( 'ul',
 697                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 698                 );
 699                 $count = 0;
 700
 701                 // Sort the list by namespace:title
 702                 usort( $rows, array( $this, 'compare' ) );
 703
 704                 // Create links for every element
 705                 $currentCount = 0;
 706                 foreach( $rows as $element ) {
 707                         $currentCount++;
 708                         if ( $currentCount > $limit ) {
 709                                 break;
 710                         }
 711
 712                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 713                         if ( !isset( $redirects[$element->page_title] ) ) {
 714                                 $liContents = $link;
 715                         } else {
 716                                 $ul = "<ul class='mw-imagepage-redirectstofile'>\n";
 717                                 foreach ( $redirects[$element->page_title] as $row ) {
 718                                         $currentCount++;
 719                                         if ( $currentCount > $limit ) {
 720                                                 break;
 721                                         }
 722
 723                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 724                                         $ul .= Html::rawElement(
 725                                                 'li',
 726                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 727                                                 $link2
 728                                                 ) . "\n";
 729                                 }
 730                                 $ul .= '</ul>';
 731                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 732                                         $link, $ul )->parse();
 733                         }
 734                         $wgOut->addHTML( Html::rawElement(
 735                                         'li',
 736                                         array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 737                                         $liContents
 738                                 ) . "\n"
 739                         );
 740
 741                 };
 742                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 743                 $res->free();
 744
 745                 // Add a links to [[Special:Whatlinkshere]]
 746                 if ( $count > $limit ) {
 747                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 748                 }
 749                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 750         }
 751
 752         protected function imageDupes() {
 753                 global $wgOut, $wgLang;
 754
 755                 $this->loadFile();
 756
 757                 $dupes = $this->mPage->getDuplicates();
 758                 if ( count( $dupes ) == 0 ) {
 759                         return;
 760                 }
 761
 762                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 763                 $wgOut->addWikiMsg( 'duplicatesoffile',
 764                         $wgLang->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 765                 );
 766                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 767
 768                 /**
 769                  * @var $file File
 770                  */
 771                 foreach ( $dupes as $file ) {
 772                         $fromSrc = '';
 773                         if ( $file->isLocal() ) {
 774                                 $link = Linker::link(
 775                                         $file->getTitle(),
 776                                         null,
 777                                         array(),
 778                                         array(),
 779                                         array( 'known', 'noclasses' )
 780                                 );
 781                         } else {
 782                                 $link = Linker::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                 $file = $this->mPage->getFile();
 796                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 797                         // Standard article deletion
 798                         parent::delete();
 799                         return;
 800                 }
 801
 802                 $deleter = new FileDeleteForm( $file );
 803                 $deleter->execute();
 804         }
 805
 806         /**
 807          * Display an error with a wikitext description
 808          *
 809          * @param $description String
 810          */
 811         function showError( $description ) {
 812                 global $wgOut;
 813                 $wgOut->setPageTitle( wfMessage( 'internalerror' ) );
 814                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 815                 $wgOut->setArticleRelated( false );
 816                 $wgOut->enableClientCache( false );
 817                 $wgOut->addWikiText( $description );
 818         }
 819
 820         /**
 821          * Callback for usort() to do link sorts by (namespace, title)
 822          * Function copied from Title::compare()
 823          *
 824          * @param $a object page to compare with
 825          * @param $b object page to compare with
 826          * @return Integer: result of string comparison, or namespace comparison
 827          */
 828         protected function compare( $a, $b ) {
 829                 if ( $a->page_namespace == $b->page_namespace ) {
 830                         return strcmp( $a->page_title, $b->page_title );
 831                 } else {
 832                         return $a->page_namespace - $b->page_namespace;
 833                 }
 834         }
 835 }
 836
 837 /**
 838  * Builds the image revision log shown on image pages
 839  *
 840  * @ingroup Media
 841  */
 842 class ImageHistoryList {
 843
 844         /**
 845          * @var Title
 846          */
 847         protected $title;
 848
 849         /**
 850          * @var File
 851          */
 852         protected $img;
 853
 854         /**
 855          * @var ImagePage
 856          */
 857         protected $imagePage;
 858
 859         /**
 860          * @var File
 861          */
 862         protected $current;
 863
 864         protected $repo, $showThumb;
 865         protected $preventClickjacking = false;
 866
 867         /**
 868          * @param ImagePage $imagePage
 869          */
 870         public function __construct( $imagePage ) {
 871                 global $wgShowArchiveThumbnails;
 872                 $this->current = $imagePage->getFile();
 873                 $this->img = $imagePage->getDisplayedFile();
 874                 $this->title = $imagePage->getTitle();
 875                 $this->imagePage = $imagePage;
 876                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 877         }
 878
 879         /**
 880          * @return ImagePage
 881          */
 882         public function getImagePage() {
 883                 return $this->imagePage;
 884         }
 885
 886         /**
 887          * @return File
 888          */
 889         public function getFile() {
 890                 return $this->img;
 891         }
 892
 893         /**
 894          * @param $navLinks string
 895          * @return string
 896          */
 897         public function beginImageHistoryList( $navLinks = '' ) {
 898                 global $wgOut, $wgUser;
 899                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 900                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 901                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 902                         . $navLinks . "\n"
 903                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 904                         . '<tr><td></td>'
 905                         . ( $this->current->isLocal() && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 906                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 907                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 908                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 909                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 910                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 911                         . "</tr>\n";
 912         }
 913
 914         /**
 915          * @param $navLinks string
 916          * @return string
 917          */
 918         public function endImageHistoryList( $navLinks = '' ) {
 919                 return "</table>\n$navLinks\n</div>\n";
 920         }
 921
 922         /**
 923          * @param $iscur
 924          * @param $file File
 925          * @return string
 926          */
 927         public function imageHistoryLine( $iscur, $file ) {
 928                 global $wgUser, $wgLang, $wgContLang;
 929
 930                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 931                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 932                 $user = $file->getUser( 'id' );
 933                 $usertext = $file->getUser( 'text' );
 934                 $description = $file->getDescription();
 935
 936                 $local = $this->current->isLocal();
 937                 $row = $selected = '';
 938
 939                 // Deletion link
 940                 if ( $local && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
 941                         $row .= '<td>';
 942                         # Link to remove from history
 943                         if ( $wgUser->isAllowed( 'delete' ) ) {
 944                                 $q = array( 'action' => 'delete' );
 945                                 if ( !$iscur ) {
 946                                         $q['oldimage'] = $img;
 947                                 }
 948                                 $row .= Linker::link(
 949                                         $this->title,
 950                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 951                                         array(), $q, array( 'known' )
 952                                 );
 953                         }
 954                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 955                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 956                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 957                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 958                                         $row .= '<br />';
 959                                 }
 960                                 // If file is top revision or locked from this user, don't link
 961                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 962                                         $del = Linker::revDeleteLinkDisabled( $canHide );
 963                                 } else {
 964                                         list( $ts, $name ) = explode( '!', $img, 2 );
 965                                         $query = array(
 966                                                 'type'   => 'oldimage',
 967                                                 'target' => $this->title->getPrefixedText(),
 968                                                 'ids'    => $ts,
 969                                         );
 970                                         $del = Linker::revDeleteLink( $query,
 971                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 972                                 }
 973                                 $row .= $del;
 974                         }
 975                         $row .= '</td>';
 976                 }
 977
 978                 // Reversion link/current indicator
 979                 $row .= '<td>';
 980                 if ( $iscur ) {
 981                         $row .= wfMsgHtml( 'filehist-current' );
 982                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 983                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 984                                 $row .= wfMsgHtml( 'filehist-revert' );
 985                         } else {
 986                                 $row .= Linker::link(
 987                                         $this->title,
 988                                         wfMsgHtml( 'filehist-revert' ),
 989                                         array(),
 990                                         array(
 991                                                 'action' => 'revert',
 992                                                 'oldimage' => $img,
 993                                                 'wpEditToken' => $wgUser->getEditToken( $img )
 994                                         ),
 995                                         array( 'known', 'noclasses' )
 996                                 );
 997                         }
 998                 }
 999                 $row .= '</td>';
1000
1001                 // Date/time and image link
1002                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1003                         $selected = "class='filehistory-selected'";
1004                 }
1005                 $row .= "<td $selected style='white-space: nowrap;'>";
1006                 if ( !$file->userCan( File::DELETED_FILE ) ) {
1007                         # Don't link to unviewable files
1008                         $row .= '<span class="history-deleted">' . $wgLang->timeanddate( $timestamp, true ) . '</span>';
1009                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1010                         if ( $local ) {
1011                                 $this->preventClickjacking();
1012                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1013                                 # Make a link to review the image
1014                                 $url = Linker::link(
1015                                         $revdel,
1016                                         $wgLang->timeanddate( $timestamp, true ),
1017                                         array(),
1018                                         array(
1019                                                 'target' => $this->title->getPrefixedText(),
1020                                                 'file' => $img,
1021                                                 'token' => $wgUser->getEditToken( $img )
1022                                         ),
1023                                         array( 'known', 'noclasses' )
1024                                 );
1025                         } else {
1026                                 $url = $wgLang->timeanddate( $timestamp, true );
1027                         }
1028                         $row .= '<span class="history-deleted">' . $url . '</span>';
1029                 } else {
1030                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1031                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeanddate( $timestamp, true ) );
1032                 }
1033                 $row .= "</td>";
1034
1035                 // Thumbnail
1036                 if ( $this->showThumb ) {
1037                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1038                 }
1039
1040                 // Image dimensions + size
1041                 $row .= '<td>';
1042                 $row .= htmlspecialchars( $file->getDimensionsString() );
1043                 $row .= ' <span style="white-space: nowrap;">(' . Linker::formatSize( $file->getSize() ) . ')</span>';
1044                 $row .= '</td>';
1045
1046                 // Uploading user
1047                 $row .= '<td>';
1048                 // Hide deleted usernames
1049                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1050                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1051                 } else {
1052                         if ( $local ) {
1053                                 $row .= Linker::userLink( $user, $usertext ) . ' <span style="white-space: nowrap;">' .
1054                                 Linker::userToolLinks( $user, $usertext ) . '</span>';
1055                         } else {
1056                                 $row .= htmlspecialchars( $usertext );
1057                         }
1058                 }
1059                 $row .= '</td>';
1060
1061                 // Don't show deleted descriptions
1062                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1063                         $row .= '<td><span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></td>';
1064                 } else {
1065                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1066                 }
1067
1068                 $rowClass = null;
1069                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1070                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1071
1072                 return "<tr{$classAttr}>{$row}</tr>\n";
1073         }
1074
1075         /**
1076          * @param $file File
1077          * @return string
1078          */
1079         protected function getThumbForLine( $file ) {
1080                 global $wgLang;
1081
1082                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1083                         $params = array(
1084                                 'width' => '120',
1085                                 'height' => '120',
1086                         );
1087                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1088
1089                         $thumbnail = $file->transform( $params );
1090                         $options = array(
1091                                 'alt' => wfMsg( 'filehist-thumbtext',
1092                                         $wgLang->timeanddate( $timestamp, true ),
1093                                         $wgLang->date( $timestamp, true ),
1094                                         $wgLang->time( $timestamp, true ) ),
1095                                 'file-link' => true,
1096                         );
1097
1098                         if ( !$thumbnail ) {
1099                                 return wfMsgHtml( 'filehist-nothumb' );
1100                         }
1101
1102                         return $thumbnail->toHtml( $options );
1103                 } else {
1104                         return wfMsgHtml( 'filehist-nothumb' );
1105                 }
1106         }
1107
1108         /**
1109          * @param $enable bool
1110          */
1111         protected function preventClickjacking( $enable = true ) {
1112                 $this->preventClickjacking = $enable;
1113         }
1114
1115         /**
1116          * @return bool
1117          */
1118         public function getPreventClickjacking() {
1119                 return $this->preventClickjacking;
1120         }
1121 }
1122
1123 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1124         protected $preventClickjacking = false;
1125
1126         /**
1127          * @var File
1128          */
1129         protected $mImg;
1130
1131         /**
1132          * @var Title
1133          */
1134         protected $mTitle;
1135
1136         /**
1137          * @param ImagePage $imagePage
1138          */
1139         function __construct( $imagePage ) {
1140                 parent::__construct();
1141                 $this->mImagePage = $imagePage;
1142                 $this->mTitle = clone ( $imagePage->getTitle() );
1143                 $this->mTitle->setFragment( '#filehistory' );
1144                 $this->mImg = null;
1145                 $this->mHist = array();
1146                 $this->mRange = array( 0, 0 ); // display range
1147         }
1148
1149         /**
1150          * @return Title
1151          */
1152         function getTitle() {
1153                 return $this->mTitle;
1154         }
1155
1156         function getQueryInfo() {
1157                 return false;
1158         }
1159
1160         /**
1161          * @return string
1162          */
1163         function getIndexField() {
1164                 return '';
1165         }
1166
1167         /**
1168          * @return string
1169          */
1170         function formatRow( $row ) {
1171                 return '';
1172         }
1173
1174         /**
1175          * @return string
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 ) {
1201                         return;
1202                 }
1203                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1204                 if ( !$this->mImg->exists() ) {
1205                         return;
1206                 }
1207                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1208                 if ( $this->mIsBackwards ) {
1209                         // Fetch the file history
1210                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1211                         // The current rev may not meet the offset/limit
1212                         $numRows = count( $this->mHist );
1213                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1214                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1215                         }
1216                 } else {
1217                         // The current rev may not meet the offset
1218                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1219                                 $this->mHist[] = $this->mImg;
1220                         }
1221                         // Old image versions (fetch extra row for nav links)
1222                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1223                         // Fetch the file history
1224                         $this->mHist = array_merge( $this->mHist,
1225                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1226                 }
1227                 $numRows = count( $this->mHist ); // Total number of query results
1228                 if ( $numRows ) {
1229                         # Index value of top item in the list
1230                         $firstIndex = $this->mIsBackwards ?
1231                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1232                         # Discard the extra result row if there is one
1233                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1234                                 if ( $this->mIsBackwards ) {
1235                                         # Index value of item past the index
1236                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1237                                         # Index value of bottom item in the list
1238                                         $lastIndex = $this->mHist[1]->getTimestamp();
1239                                         # Display range
1240                                         $this->mRange = array( 1, $numRows - 1 );
1241                                 } else {
1242                                         # Index value of item past the index
1243                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1244                                         # Index value of bottom item in the list
1245                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1246                                         # Display range
1247                                         $this->mRange = array( 0, $numRows - 2 );
1248                                 }
1249                         } else {
1250                                 # Setting indexes to an empty string means that they will be
1251                                 # omitted if they would otherwise appear in URLs. It just so
1252                                 # happens that this  is the right thing to do in the standard
1253                                 # UI, in all the relevant cases.
1254                                 $this->mPastTheEndIndex = '';
1255                                 # Index value of bottom item in the list
1256                                 $lastIndex = $this->mIsBackwards ?
1257                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1258                                 # Display range
1259                                 $this->mRange = array( 0, $numRows - 1 );
1260                         }
1261                 } else {
1262                         $firstIndex = '';
1263                         $lastIndex = '';
1264                         $this->mPastTheEndIndex = '';
1265                 }
1266                 if ( $this->mIsBackwards ) {
1267                         $this->mIsFirst = ( $numRows < $queryLimit );
1268                         $this->mIsLast = ( $this->mOffset == '' );
1269                         $this->mLastShown = $firstIndex;
1270                         $this->mFirstShown = $lastIndex;
1271                 } else {
1272                         $this->mIsFirst = ( $this->mOffset == '' );
1273                         $this->mIsLast = ( $numRows < $queryLimit );
1274                         $this->mLastShown = $lastIndex;
1275                         $this->mFirstShown = $firstIndex;
1276                 }
1277                 $this->mQueryDone = true;
1278         }
1279
1280         /**
1281          * @param $enable bool
1282          */
1283         protected function preventClickjacking( $enable = true ) {
1284                 $this->preventClickjacking = $enable;
1285         }
1286
1287         /**
1288          * @return bool
1289          */
1290         public function getPreventClickjacking() {
1291                 return $this->preventClickjacking;
1292         }
1293
1294 }