includes/ImagePage.php

   1 <?php
   2 /**
   3  * Class for viewing MediaWiki file description pages
   4  *
   5  * @ingroup Media
   6  */
   7 class ImagePage extends Article {
   8
   9         /**
  10          * @var File
  11          */
  12         private $displayImg;
  13         /**
  14          * @var FileRepo
  15          */
  16         private $repo;
  17         private $fileLoaded;
  18
  19         var $mExtraDescription = false;
  20
  21         /**
  22          * @param $title Title
  23          * @return WikiFilePage
  24          */
  25         protected function newPage( Title $title ) {
  26                 // Overload mPage with a file-specific page
  27                 return new WikiFilePage( $title );
  28         }
  29
  30         /**
  31          * Constructor from a page id
  32          * @param $id Int article ID to load
  33          */
  34         public static function newFromID( $id ) {
  35                 $t = Title::newFromID( $id );
  36                 # @todo FIXME: Doesn't inherit right
  37                 return $t == null ? null : new self( $t );
  38                 # return $t == null ? null : new static( $t ); // PHP 5.3
  39         }
  40
  41         /**
  42          * @param $file File:
  43          * @return void
  44          */
  45         public function setFile( $file ) {
  46                 $this->mPage->setFile( $file );
  47                 $this->displayImg = $file;
  48                 $this->fileLoaded = true;
  49         }
  50
  51         protected function loadFile() {
  52                 if ( $this->fileLoaded ) {
  53                         return true;
  54                 }
  55                 $this->fileLoaded = true;
  56
  57                 $this->displayImg = $img = false;
  58                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  59                 if ( !$img ) { // not set by hook?
  60                         $img = wfFindFile( $this->getTitle() );
  61                         if ( !$img ) {
  62                                 $img = wfLocalFile( $this->getTitle() );
  63                         }
  64                 }
  65                 $this->mPage->setFile( $img );
  66                 if ( !$this->displayImg ) { // not set by hook?
  67                         $this->displayImg = $img;
  68                 }
  69                 $this->repo = $img->getRepo();
  70         }
  71
  72         /**
  73          * Handler for action=render
  74          * Include body text only; none of the image extras
  75          */
  76         public function render() {
  77                 global $wgOut;
  78                 $wgOut->setArticleBodyOnly( true );
  79                 parent::view();
  80         }
  81
  82         public function view() {
  83                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  84
  85                 $diff = $wgRequest->getVal( 'diff' );
  86                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  87
  88                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  89                         return parent::view();
  90                 }
  91
  92                 $this->loadFile();
  93
  94                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
  95                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || isset( $diff ) ) {
  96                                 // mTitle is the same as the redirect target so ask Article
  97                                 // to perform the redirect for us.
  98                                 $wgRequest->setVal( 'diffonly', 'true' );
  99                                 return parent::view();
 100                         } else {
 101                                 // mTitle is not the same as the redirect target so it is
 102                                 // probably the redirect page itself. Fake the redirect symbol
 103                                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 104                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 105                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 106                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 107                                 return;
 108                         }
 109                 }
 110
 111                 $this->showRedirectedFromHeader();
 112
 113                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 114                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 115                         $formattedMetadata = $this->displayImg->formatMetadata();
 116                         $showmeta = $formattedMetadata !== false;
 117                 } else {
 118                         $showmeta = false;
 119                 }
 120
 121                 if ( !$diff && $this->displayImg->exists() ) {
 122                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 123                 }
 124
 125                 if ( !$diff ) {
 126                         $this->openShowImage();
 127                 }
 128
 129                 # No need to display noarticletext, we use our own message, output in openShowImage()
 130                 if ( $this->mPage->getID() ) {
 131                         # NS_FILE is in the user language, but this section (the actual wikitext)
 132                         # should be in page content language
 133                         $pageLang = $this->getTitle()->getPageLanguage();
 134                         $wgOut->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 135                                 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
 136                                 'class' => 'mw-content-'.$pageLang->getDir() ) ) );
 137
 138             parent::view(); #FIXME: use ContentHandler::makeArticle() !!
 139
 140                         $wgOut->addHTML( Xml::closeElement( 'div' ) );
 141                 } else {
 142                         # Just need to set the right headers
 143                         $wgOut->setArticleFlag( true );
 144                         $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 145                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 146                 }
 147
 148                 # Show shared description, if needed
 149                 if ( $this->mExtraDescription ) {
 150                         $fol = wfMessage( 'shareddescriptionfollows' );
 151                         if ( !$fol->isDisabled() ) {
 152                                 $wgOut->addWikiText( $fol->plain() );
 153                         }
 154                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 155                 }
 156
 157                 $this->closeShowImage();
 158                 $this->imageHistory();
 159                 // TODO: Cleanup the following
 160
 161                 $wgOut->addHTML( Xml::element( 'h2',
 162                         array( 'id' => 'filelinks' ),
 163                         wfMsg( 'imagelinks' ) ) . "\n" );
 164                 $this->imageDupes();
 165                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 166                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 167                 $this->imageLinks();
 168
 169                 # Allow extensions to add something after the image links
 170                 $html = '';
 171                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 172                 if ( $html ) {
 173                         $wgOut->addHTML( $html );
 174                 }
 175
 176                 if ( $showmeta ) {
 177                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 178                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 179                         $wgOut->addModules( array( 'mediawiki.action.view.metadata' ) );
 180                 }
 181
 182                 // Add remote Filepage.css
 183                 if( !$this->repo->isLocal() ) {
 184                         $css = $this->repo->getDescriptionStylesheetUrl();
 185                         if ( $css ) {
 186                                 $wgOut->addStyle( $css );
 187                         }
 188                 }
 189                 // always show the local local Filepage.css, bug 29277
 190                 $wgOut->addModuleStyles( 'filepage' );
 191         }
 192
 193         /**
 194          * @return File
 195          */
 196         public function getDisplayedFile() {
 197                 $this->loadFile();
 198                 return $this->displayImg;
 199         }
 200
 201         /**
 202          * Create the TOC
 203          *
 204          * @param $metadata Boolean: whether or not to show the metadata link
 205          * @return String
 206          */
 207         protected function showTOC( $metadata ) {
 208                 $r = array(
 209                         '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 210                         '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 211                         '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 212                 );
 213                 if ( $metadata ) {
 214                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 215                 }
 216
 217                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 218
 219                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 220         }
 221
 222         /**
 223          * Make a table with metadata to be shown in the output page.
 224          *
 225          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 226          *
 227          * @param $metadata Array: the array containing the EXIF data
 228          * @return String The metadata table. This is treated as Wikitext (!)
 229          */
 230         protected function makeMetadataTable( $metadata ) {
 231                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 232                 $r .= wfMsgNoTrans( 'metadata-help' );
 233                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 234                 foreach ( $metadata as $type => $stuff ) {
 235                         foreach ( $stuff as $v ) {
 236                                 # @todo FIXME: Why is this using escapeId for a class?!
 237                                 $class = Sanitizer::escapeId( $v['id'] );
 238                                 if ( $type == 'collapsed' ) {
 239                                         $class .= ' collapsable';
 240                                 }
 241                                 $r .= "<tr class=\"$class\">\n";
 242                                 $r .= "<th>{$v['name']}</th>\n";
 243                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 244                         }
 245                 }
 246                 $r .= "</table>\n</div>\n";
 247                 return $r;
 248         }
 249
 250     /**
 251      * Overloading Article's getContentObject method.
 252      *
 253      * Omit noarticletext if sharedupload; text will be fetched from the
 254      * shared upload server if possible.
 255      * @return string
 256      */
 257     public function getContentObject() {
 258         $this->loadFile();
 259         if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 260             return null;
 261         }
 262         return parent::getContentObject();
 263     }
 264
 265         protected function openShowImage() {
 266                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 267                         $wgLang, $wgEnableUploads, $wgSend404Code;
 268
 269                 $this->loadFile();
 270
 271                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 272                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 273                         $sizeSel = User::getDefaultOption( 'imagesize' );
 274
 275                         // The user offset might still be incorrect, specially if
 276                         // $wgImageLimits got changed (see bug #8858).
 277                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 278                                 // Default to the first offset in $wgImageLimits
 279                                 $sizeSel = 0;
 280                         }
 281                 }
 282                 $max = $wgImageLimits[$sizeSel];
 283                 $maxWidth = $max[0];
 284                 $maxHeight = $max[1];
 285                 $dirmark = $wgLang->getDirMark();
 286
 287                 if ( $this->displayImg->exists() ) {
 288                         # image
 289                         $page = $wgRequest->getIntOrNull( 'page' );
 290                         if ( is_null( $page ) ) {
 291                                 $params = array();
 292                                 $page = 1;
 293                         } else {
 294                                 $params = array( 'page' => $page );
 295                         }
 296                         $width_orig = $this->displayImg->getWidth( $page );
 297                         $width = $width_orig;
 298                         $height_orig = $this->displayImg->getHeight( $page );
 299                         $height = $height_orig;
 300
 301                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 302
 303                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 304
 305                         if ( $this->displayImg->allowInlineDisplay() ) {
 306                                 # image
 307
 308                                 # "Download high res version" link below the image
 309                                 # $msgsize = wfMsgHtml( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime );
 310                                 # We'll show a thumbnail of this image
 311                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 312                                         # Calculate the thumbnail size.
 313                                         # First case, the limiting factor is the width, not the height.
 314                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 315                                                 $height = round( $height * $maxWidth / $width );
 316                                                 $width = $maxWidth;
 317                                                 # Note that $height <= $maxHeight now.
 318                                         } else {
 319                                                 $newwidth = floor( $width * $maxHeight / $height );
 320                                                 $height = round( $height * $newwidth / $width );
 321                                                 $width = $newwidth;
 322                                                 # Note that $height <= $maxHeight now, but might not be identical
 323                                                 # because of rounding.
 324                                         }
 325                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 326                                         $otherSizes = array();
 327                                         foreach ( $wgImageLimits as $size ) {
 328                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig &&
 329                                                                 $size[0] != $width && $size[1] != $height ) {
 330                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 331                                                 }
 332                                         }
 333                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 334                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 335                                                 parse();
 336                                         if ( count( $otherSizes ) && $this->displayImg->getRepo()->canTransformVia404() ) {
 337                                                 $msgsmall .= ' ' .
 338                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 339                                                         wfMessage( 'show-big-image-other' )->rawParams( $wgLang->pipeList( $otherSizes ) )->
 340                                                         params( count( $otherSizes ) )->parse()
 341                                                 );
 342                                         }
 343                                 } elseif ( $width == 0 && $height == 0 ){
 344                                         # Some sort of audio file that doesn't have dimensions
 345                                         # Don't output a no hi res message for such a file
 346                                         $msgsmall = '';
 347                                 } else {
 348                                         # Image is small enough to show full size on image page
 349                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 350                                 }
 351
 352                                 $params['width'] = $width;
 353                                 $params['height'] = $height;
 354                                 $thumbnail = $this->displayImg->transform( $params );
 355
 356                                 $showLink = true;
 357                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 358
 359                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 360                                 if ( $isMulti ) {
 361                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 362                                 }
 363
 364                                 if ( $thumbnail ) {
 365                                         $options = array(
 366                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 367                                                 'file-link' => true,
 368                                         );
 369                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 370                                                 $thumbnail->toHtml( $options ) .
 371                                                 $anchorclose . "</div>\n" );
 372                                 }
 373
 374                                 if ( $isMulti ) {
 375                                         $count = $this->displayImg->pageCount();
 376
 377                                         if ( $page > 1 ) {
 378                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 379                                                 $link = Linker::link(
 380                                                         $this->getTitle(),
 381                                                         $label,
 382                                                         array(),
 383                                                         array( 'page' => $page - 1 ),
 384                                                         array( 'known', 'noclasses' )
 385                                                 );
 386                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 387                                                         array( 'page' => $page - 1 ) );
 388                                         } else {
 389                                                 $thumb1 = '';
 390                                         }
 391
 392                                         if ( $page < $count ) {
 393                                                 $label = wfMsg( 'imgmultipagenext' );
 394                                                 $link = Linker::link(
 395                                                         $this->getTitle(),
 396                                                         $label,
 397                                                         array(),
 398                                                         array( 'page' => $page + 1 ),
 399                                                         array( 'known', 'noclasses' )
 400                                                 );
 401                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 402                                                         array( 'page' => $page + 1 ) );
 403                                         } else {
 404                                                 $thumb2 = '';
 405                                         }
 406
 407                                         global $wgScript;
 408
 409                                         $formParams = array(
 410                                                 'name' => 'pageselector',
 411                                                 'action' => $wgScript,
 412                                                 'onchange' => 'document.pageselector.submit();',
 413                                         );
 414                                         $options = array();
 415                                         for ( $i = 1; $i <= $count; $i++ ) {
 416                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 417                                         }
 418                                         $select = Xml::tags( 'select',
 419                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 420                                                 implode( "\n", $options ) );
 421
 422                                         $wgOut->addHTML(
 423                                                 '</td><td><div class="multipageimagenavbox">' .
 424                                                 Xml::openElement( 'form', $formParams ) .
 425                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 426                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 427                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 428                                                 Xml::closeElement( 'form' ) .
 429                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 430                                         );
 431                                 }
 432                         } else {
 433                                 # if direct link is allowed but it's not a renderable image, show an icon.
 434                                 if ( $this->displayImg->isSafeFile() ) {
 435                                         $icon = $this->displayImg->iconThumb();
 436
 437                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 438                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 439                                                 "</div>\n" );
 440                                 }
 441
 442                                 $showLink = true;
 443                         }
 444
 445                         if ( $showLink ) {
 446                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 447                                 $linktext = $filename;
 448                                 if ( isset( $msgbig ) ) {
 449                                         $linktext = wfEscapeWikiText( $msgbig );
 450                                 }
 451                                 $medialink = "[[Media:$filename|$linktext]]";
 452
 453                                 if ( !$this->displayImg->isSafeFile() ) {
 454                                         $warning = wfMsgNoTrans( 'mediawarning' );
 455                                         $wgOut->addWikiText( <<<EOT
 456 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 457 <div class="mediaWarning">$warning</div>
 458 EOT
 459                                                 );
 460                                 } else {
 461                                         $wgOut->addWikiText( <<<EOT
 462 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 463 </div>
 464 EOT
 465                                         );
 466                                 }
 467                         }
 468
 469                         if ( !$this->displayImg->isLocal() ) {
 470                                 $this->printSharedImageText();
 471                         }
 472                 } else {
 473                         # Image does not exist
 474                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 475                                 // Only show an upload link if the user can upload
 476                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 477                                 $nofile = array(
 478                                         'filepage-nofile-link',
 479                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 480                                 );
 481                         } else {
 482                                 $nofile = 'filepage-nofile';
 483                         }
 484                         // Note, if there is an image description page, but
 485                         // no image, then this setRobotPolicy is overriden
 486                         // by Article::View().
 487                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 488                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 489                         if ( !$this->getID() && $wgSend404Code ) {
 490                                 // If there is no image, no shared image, and no description page,
 491                                 // output a 404, to be consistent with articles.
 492                                 $wgRequest->response()->header( 'HTTP/1.1 404 Not Found' );
 493                         }
 494                 }
 495                 $wgOut->setFileVersion( $this->displayImg );
 496         }
 497
 498         /**
 499          * Creates an thumbnail of specified size and returns an HTML link to it
 500          * @param $params array Scaler parameters
 501          * @param $width int
 502          * @param $height int
 503          * @return string
 504          */
 505         private function makeSizeLink( $params, $width, $height ) {
 506                 $params['width'] = $width;
 507                 $params['height'] = $height;
 508                 $thumbnail = $this->displayImg->transform( $params );
 509                 if ( $thumbnail && !$thumbnail->isError() ) {
 510                         return Html::rawElement( 'a', array(
 511                                 'href' => $thumbnail->getUrl(),
 512                                 'class' => 'mw-thumbnail-link'
 513                                 ), wfMessage( 'show-big-image-size' )->numParams(
 514                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 515                                 )->parse() );
 516                 } else {
 517                         return '';
 518                 }
 519         }
 520
 521         /**
 522          * Show a notice that the file is from a shared repository
 523          */
 524         protected function printSharedImageText() {
 525                 global $wgOut;
 526
 527                 $this->loadFile();
 528
 529                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 530                 $descText = $this->mPage->getFile()->getDescriptionText();
 531
 532                 /* Add canonical to head if there is no local page for this shared file */
 533                 if( $descUrl && $this->mPage->getID() == 0 ) {
 534                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 535                 }
 536
 537                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 538                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 539
 540                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 541                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 542                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 543                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 544                 } else {
 545                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 546                 }
 547
 548                 if ( $descText ) {
 549                         $this->mExtraDescription = $descText;
 550                 }
 551         }
 552
 553         public function getUploadUrl() {
 554                 $this->loadFile();
 555                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 556                 return $uploadTitle->getFullURL( array(
 557                         'wpDestFile' => $this->mPage->getFile()->getName(),
 558                         'wpForReUpload' => 1
 559                  ) );
 560         }
 561
 562         /**
 563          * Print out the various links at the bottom of the image page, e.g. reupload,
 564          * external editing (and instructions link) etc.
 565          */
 566         protected function uploadLinksBox() {
 567                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 568
 569                 if ( !$wgEnableUploads ) {
 570                         return;
 571                 }
 572
 573                 $this->loadFile();
 574                 if ( !$this->mPage->getFile()->isLocal() ) {
 575                         return;
 576                 }
 577
 578                 $wgOut->addHTML( "<br /><ul>\n" );
 579
 580                 # "Upload a new version of this file" link
 581                 if ( UploadBase::userCanReUpload( $wgUser, $this->mPage->getFile()->name ) ) {
 582                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 583                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 584                 }
 585
 586                 # External editing link
 587                 if ( $wgUseExternalEditor ) {
 588                         $elink = Linker::link(
 589                                 $this->getTitle(),
 590                                 wfMsgHtml( 'edit-externally' ),
 591                                 array(),
 592                                 array(
 593                                         'action' => 'edit',
 594                                         'externaledit' => 'true',
 595                                         'mode' => 'file'
 596                                 ),
 597                                 array( 'known', 'noclasses' )
 598                         );
 599                         $wgOut->addHTML(
 600                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 601                                 wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) .
 602                                 "</small></li>\n"
 603                         );
 604                 }
 605
 606                 $wgOut->addHTML( "</ul>\n" );
 607         }
 608
 609         protected function closeShowImage() { } # For overloading
 610
 611         /**
 612          * If the page we've just displayed is in the "Image" namespace,
 613          * we follow it with an upload history of the image and its usage.
 614          */
 615         protected function imageHistory() {
 616                 global $wgOut;
 617
 618                 $this->loadFile();
 619                 $pager = new ImageHistoryPseudoPager( $this );
 620                 $wgOut->addHTML( $pager->getBody() );
 621                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 622
 623                 $this->mPage->getFile()->resetHistory(); // free db resources
 624
 625                 # Exist check because we don't want to show this on pages where an image
 626                 # doesn't exist along with the noimage message, that would suck. -ævar
 627                 if ( $this->mPage->getFile()->exists() ) {
 628                         $this->uploadLinksBox();
 629                 }
 630         }
 631
 632         /**
 633          * @param $target
 634          * @param $limit
 635          * @return ResultWrapper
 636          */
 637         protected function queryImageLinks( $target, $limit ) {
 638                 $dbr = wfGetDB( DB_SLAVE );
 639
 640                 return $dbr->select(
 641                         array( 'imagelinks', 'page' ),
 642                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 643                         array( 'il_to' => $target, 'il_from = page_id' ),
 644                         __METHOD__,
 645                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 646                 );
 647         }
 648
 649         protected function imageLinks() {
 650                 global $wgOut, $wgLang;
 651
 652                 $limit = 100;
 653
 654                 $res = $this->queryImageLinks( $this->getTitle()->getDbKey(), $limit + 1);
 655                 $rows = array();
 656                 $redirects = array();
 657                 foreach ( $res as $row ) {
 658                         if ( $row->page_is_redirect ) {
 659                                 $redirects[$row->page_title] = array();
 660                         }
 661                         $rows[] = $row;
 662                 }
 663                 $count = count( $rows );
 664
 665                 $hasMore = $count > $limit;
 666                 if ( !$hasMore && count( $redirects ) ) {
 667                         $res = $this->queryImageLinks( array_keys( $redirects ),
 668                                 $limit - count( $rows ) + 1 );
 669                         foreach ( $res as $row ) {
 670                                 $redirects[$row->il_to][] = $row;
 671                                 $count++;
 672                         }
 673                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 674                 }
 675
 676                 if ( $count == 0 ) {
 677                         $wgOut->wrapWikiMsg(
 678                                 Html::rawElement( 'div',
 679                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 680                                 'nolinkstoimage'
 681                         );
 682                         return;
 683                 }
 684
 685                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 686                 if ( !$hasMore ) {
 687                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 688                 } else {
 689                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 690                         $wgOut->addWikiMsg( 'linkstoimage-more',
 691                                 $wgLang->formatNum( $limit ),
 692                                 $this->getTitle()->getPrefixedDBkey()
 693                         );
 694                 }
 695
 696                 $wgOut->addHTML(
 697                         Html::openElement( 'ul',
 698                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 699                 );
 700                 $count = 0;
 701
 702                 // Sort the list by namespace:title
 703                 usort( $rows, array( $this, 'compare' ) );
 704
 705                 // Create links for every element
 706                 $currentCount = 0;
 707                 foreach( $rows as $element ) {
 708                         $currentCount++;
 709                         if ( $currentCount > $limit ) {
 710                                 break;
 711                         }
 712
 713                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 714                         if ( !isset( $redirects[$element->page_title] ) ) {
 715                                 $liContents = $link;
 716                         } else {
 717                                 $ul = "<ul class='mw-imagepage-redirectstofile'>\n";
 718                                 foreach ( $redirects[$element->page_title] as $row ) {
 719                                         $currentCount++;
 720                                         if ( $currentCount > $limit ) {
 721                                                 break;
 722                                         }
 723
 724                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 725                                         $ul .= Html::rawElement(
 726                                                 'li',
 727                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 728                                                 $link2
 729                                                 ) . "\n";
 730                                 }
 731                                 $ul .= '</ul>';
 732                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 733                                         $link, $ul )->parse();
 734                         }
 735                         $wgOut->addHTML( Html::rawElement(
 736                                         'li',
 737                                         array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 738                                         $liContents
 739                                 ) . "\n"
 740                         );
 741
 742                 };
 743                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 744                 $res->free();
 745
 746                 // Add a links to [[Special:Whatlinkshere]]
 747                 if ( $count > $limit ) {
 748                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 749                 }
 750                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 751         }
 752
 753         protected function imageDupes() {
 754                 global $wgOut, $wgLang;
 755
 756                 $this->loadFile();
 757
 758                 $dupes = $this->mPage->getDuplicates();
 759                 if ( count( $dupes ) == 0 ) {
 760                         return;
 761                 }
 762
 763                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 764                 $wgOut->addWikiMsg( 'duplicatesoffile',
 765                         $wgLang->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 766                 );
 767                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 768
 769                 /**
 770                  * @var $file File
 771                  */
 772                 foreach ( $dupes as $file ) {
 773                         $fromSrc = '';
 774                         if ( $file->isLocal() ) {
 775                                 $link = Linker::link(
 776                                         $file->getTitle(),
 777                                         null,
 778                                         array(),
 779                                         array(),
 780                                         array( 'known', 'noclasses' )
 781                                 );
 782                         } else {
 783                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 784                                         $file->getTitle()->getPrefixedText() );
 785                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 786                         }
 787                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 788                 }
 789                 $wgOut->addHTML( "</ul></div>\n" );
 790         }
 791
 792         /**
 793          * Delete the file, or an earlier version of it
 794          */
 795         public function delete() {
 796                 $file = $this->mPage->getFile();
 797                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 798                         // Standard article deletion
 799                         parent::delete();
 800                         return;
 801                 }
 802
 803                 $deleter = new FileDeleteForm( $file );
 804                 $deleter->execute();
 805         }
 806
 807         /**
 808          * Display an error with a wikitext description
 809          *
 810          * @param $description String
 811          */
 812         function showError( $description ) {
 813                 global $wgOut;
 814                 $wgOut->setPageTitle( wfMessage( 'internalerror' ) );
 815                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 816                 $wgOut->setArticleRelated( false );
 817                 $wgOut->enableClientCache( false );
 818                 $wgOut->addWikiText( $description );
 819         }
 820
 821         /**
 822          * Callback for usort() to do link sorts by (namespace, title)
 823          * Function copied from Title::compare()
 824          *
 825          * @param $a object page to compare with
 826          * @param $b object page to compare with
 827          * @return Integer: result of string comparison, or namespace comparison
 828          */
 829         protected function compare( $a, $b ) {
 830                 if ( $a->page_namespace == $b->page_namespace ) {
 831                         return strcmp( $a->page_title, $b->page_title );
 832                 } else {
 833                         return $a->page_namespace - $b->page_namespace;
 834                 }
 835         }
 836 }
 837
 838 /**
 839  * Builds the image revision log shown on image pages
 840  *
 841  * @ingroup Media
 842  */
 843 class ImageHistoryList {
 844
 845         /**
 846          * @var Title
 847          */
 848         protected $title;
 849
 850         /**
 851          * @var File
 852          */
 853         protected $img;
 854
 855         /**
 856          * @var ImagePage
 857          */
 858         protected $imagePage;
 859
 860         /**
 861          * @var File
 862          */
 863         protected $current;
 864
 865         protected $repo, $showThumb;
 866         protected $preventClickjacking = false;
 867
 868         /**
 869          * @param ImagePage $imagePage
 870          */
 871         public function __construct( $imagePage ) {
 872                 global $wgShowArchiveThumbnails;
 873                 $this->current = $imagePage->getFile();
 874                 $this->img = $imagePage->getDisplayedFile();
 875                 $this->title = $imagePage->getTitle();
 876                 $this->imagePage = $imagePage;
 877                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 878         }
 879
 880         /**
 881          * @return ImagePage
 882          */
 883         public function getImagePage() {
 884                 return $this->imagePage;
 885         }
 886
 887         /**
 888          * @return File
 889          */
 890         public function getFile() {
 891                 return $this->img;
 892         }
 893
 894         /**
 895          * @param $navLinks string
 896          * @return string
 897          */
 898         public function beginImageHistoryList( $navLinks = '' ) {
 899                 global $wgOut, $wgUser;
 900                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 901                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 902                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 903                         . $navLinks . "\n"
 904                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 905                         . '<tr><td></td>'
 906                         . ( $this->current->isLocal() && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 907                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 908                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 909                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 910                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 911                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 912                         . "</tr>\n";
 913         }
 914
 915         /**
 916          * @param $navLinks string
 917          * @return string
 918          */
 919         public function endImageHistoryList( $navLinks = '' ) {
 920                 return "</table>\n$navLinks\n</div>\n";
 921         }
 922
 923         /**
 924          * @param $iscur
 925          * @param $file File
 926          * @return string
 927          */
 928         public function imageHistoryLine( $iscur, $file ) {
 929                 global $wgUser, $wgLang, $wgContLang;
 930
 931                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 932                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 933                 $user = $file->getUser( 'id' );
 934                 $usertext = $file->getUser( 'text' );
 935                 $description = $file->getDescription();
 936
 937                 $local = $this->current->isLocal();
 938                 $row = $selected = '';
 939
 940                 // Deletion link
 941                 if ( $local && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
 942                         $row .= '<td>';
 943                         # Link to remove from history
 944                         if ( $wgUser->isAllowed( 'delete' ) ) {
 945                                 $q = array( 'action' => 'delete' );
 946                                 if ( !$iscur ) {
 947                                         $q['oldimage'] = $img;
 948                                 }
 949                                 $row .= Linker::link(
 950                                         $this->title,
 951                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 952                                         array(), $q, array( 'known' )
 953                                 );
 954                         }
 955                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 956                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 957                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 958                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 959                                         $row .= '<br />';
 960                                 }
 961                                 // If file is top revision or locked from this user, don't link
 962                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 963                                         $del = Linker::revDeleteLinkDisabled( $canHide );
 964                                 } else {
 965                                         list( $ts, $name ) = explode( '!', $img, 2 );
 966                                         $query = array(
 967                                                 'type'   => 'oldimage',
 968                                                 'target' => $this->title->getPrefixedText(),
 969                                                 'ids'    => $ts,
 970                                         );
 971                                         $del = Linker::revDeleteLink( $query,
 972                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 973                                 }
 974                                 $row .= $del;
 975                         }
 976                         $row .= '</td>';
 977                 }
 978
 979                 // Reversion link/current indicator
 980                 $row .= '<td>';
 981                 if ( $iscur ) {
 982                         $row .= wfMsgHtml( 'filehist-current' );
 983                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 984                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 985                                 $row .= wfMsgHtml( 'filehist-revert' );
 986                         } else {
 987                                 $row .= Linker::link(
 988                                         $this->title,
 989                                         wfMsgHtml( 'filehist-revert' ),
 990                                         array(),
 991                                         array(
 992                                                 'action' => 'revert',
 993                                                 'oldimage' => $img,
 994                                                 'wpEditToken' => $wgUser->getEditToken( $img )
 995                                         ),
 996                                         array( 'known', 'noclasses' )
 997                                 );
 998                         }
 999                 }
1000                 $row .= '</td>';
1001
1002                 // Date/time and image link
1003                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1004                         $selected = "class='filehistory-selected'";
1005                 }
1006                 $row .= "<td $selected style='white-space: nowrap;'>";
1007                 if ( !$file->userCan( File::DELETED_FILE ) ) {
1008                         # Don't link to unviewable files
1009                         $row .= '<span class="history-deleted">' . $wgLang->timeanddate( $timestamp, true ) . '</span>';
1010                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1011                         if ( $local ) {
1012                                 $this->preventClickjacking();
1013                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1014                                 # Make a link to review the image
1015                                 $url = Linker::link(
1016                                         $revdel,
1017                                         $wgLang->timeanddate( $timestamp, true ),
1018                                         array(),
1019                                         array(
1020                                                 'target' => $this->title->getPrefixedText(),
1021                                                 'file' => $img,
1022                                                 'token' => $wgUser->getEditToken( $img )
1023                                         ),
1024                                         array( 'known', 'noclasses' )
1025                                 );
1026                         } else {
1027                                 $url = $wgLang->timeanddate( $timestamp, true );
1028                         }
1029                         $row .= '<span class="history-deleted">' . $url . '</span>';
1030                 } else {
1031                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1032                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeanddate( $timestamp, true ) );
1033                 }
1034                 $row .= "</td>";
1035
1036                 // Thumbnail
1037                 if ( $this->showThumb ) {
1038                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1039                 }
1040
1041                 // Image dimensions + size
1042                 $row .= '<td>';
1043                 $row .= htmlspecialchars( $file->getDimensionsString() );
1044                 $row .= ' <span style="white-space: nowrap;">(' . Linker::formatSize( $file->getSize() ) . ')</span>';
1045                 $row .= '</td>';
1046
1047                 // Uploading user
1048                 $row .= '<td>';
1049                 // Hide deleted usernames
1050                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1051                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1052                 } else {
1053                         if ( $local ) {
1054                                 $row .= Linker::userLink( $user, $usertext ) . ' <span style="white-space: nowrap;">' .
1055                                 Linker::userToolLinks( $user, $usertext ) . '</span>';
1056                         } else {
1057                                 $row .= htmlspecialchars( $usertext );
1058                         }
1059                 }
1060                 $row .= '</td>';
1061
1062                 // Don't show deleted descriptions
1063                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1064                         $row .= '<td><span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></td>';
1065                 } else {
1066                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1067                 }
1068
1069                 $rowClass = null;
1070                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1071                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1072
1073                 return "<tr{$classAttr}>{$row}</tr>\n";
1074         }
1075
1076         /**
1077          * @param $file File
1078          * @return string
1079          */
1080         protected function getThumbForLine( $file ) {
1081                 global $wgLang;
1082
1083                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1084                         $params = array(
1085                                 'width' => '120',
1086                                 'height' => '120',
1087                         );
1088                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1089
1090                         $thumbnail = $file->transform( $params );
1091                         $options = array(
1092                                 'alt' => wfMsg( 'filehist-thumbtext',
1093                                         $wgLang->timeanddate( $timestamp, true ),
1094                                         $wgLang->date( $timestamp, true ),
1095                                         $wgLang->time( $timestamp, true ) ),
1096                                 'file-link' => true,
1097                         );
1098
1099                         if ( !$thumbnail ) {
1100                                 return wfMsgHtml( 'filehist-nothumb' );
1101                         }
1102
1103                         return $thumbnail->toHtml( $options );
1104                 } else {
1105                         return wfMsgHtml( 'filehist-nothumb' );
1106                 }
1107         }
1108
1109         /**
1110          * @param $enable bool
1111          */
1112         protected function preventClickjacking( $enable = true ) {
1113                 $this->preventClickjacking = $enable;
1114         }
1115
1116         /**
1117          * @return bool
1118          */
1119         public function getPreventClickjacking() {
1120                 return $this->preventClickjacking;
1121         }
1122 }
1123
1124 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1125         protected $preventClickjacking = false;
1126
1127         /**
1128          * @var File
1129          */
1130         protected $mImg;
1131
1132         /**
1133          * @var Title
1134          */
1135         protected $mTitle;
1136
1137         /**
1138          * @param ImagePage $imagePage
1139          */
1140         function __construct( $imagePage ) {
1141                 parent::__construct();
1142                 $this->mImagePage = $imagePage;
1143                 $this->mTitle = clone ( $imagePage->getTitle() );
1144                 $this->mTitle->setFragment( '#filehistory' );
1145                 $this->mImg = null;
1146                 $this->mHist = array();
1147                 $this->mRange = array( 0, 0 ); // display range
1148         }
1149
1150         /**
1151          * @return Title
1152          */
1153         function getTitle() {
1154                 return $this->mTitle;
1155         }
1156
1157         function getQueryInfo() {
1158                 return false;
1159         }
1160
1161         /**
1162          * @return string
1163          */
1164         function getIndexField() {
1165                 return '';
1166         }
1167
1168         /**
1169          * @return string
1170          */
1171         function formatRow( $row ) {
1172                 return '';
1173         }
1174
1175         /**
1176          * @return string
1177          */
1178         function getBody() {
1179                 $s = '';
1180                 $this->doQuery();
1181                 if ( count( $this->mHist ) ) {
1182                         $list = new ImageHistoryList( $this->mImagePage );
1183                         # Generate prev/next links
1184                         $navLink = $this->getNavigationBar();
1185                         $s = $list->beginImageHistoryList( $navLink );
1186                         // Skip rows there just for paging links
1187                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1188                                 $file = $this->mHist[$i];
1189                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1190                         }
1191                         $s .= $list->endImageHistoryList( $navLink );
1192
1193                         if ( $list->getPreventClickjacking() ) {
1194                                 $this->preventClickjacking();
1195                         }
1196                 }
1197                 return $s;
1198         }
1199
1200         function doQuery() {
1201                 if ( $this->mQueryDone ) {
1202                         return;
1203                 }
1204                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1205                 if ( !$this->mImg->exists() ) {
1206                         return;
1207                 }
1208                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1209                 if ( $this->mIsBackwards ) {
1210                         // Fetch the file history
1211                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1212                         // The current rev may not meet the offset/limit
1213                         $numRows = count( $this->mHist );
1214                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1215                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1216                         }
1217                 } else {
1218                         // The current rev may not meet the offset
1219                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1220                                 $this->mHist[] = $this->mImg;
1221                         }
1222                         // Old image versions (fetch extra row for nav links)
1223                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1224                         // Fetch the file history
1225                         $this->mHist = array_merge( $this->mHist,
1226                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1227                 }
1228                 $numRows = count( $this->mHist ); // Total number of query results
1229                 if ( $numRows ) {
1230                         # Index value of top item in the list
1231                         $firstIndex = $this->mIsBackwards ?
1232                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1233                         # Discard the extra result row if there is one
1234                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1235                                 if ( $this->mIsBackwards ) {
1236                                         # Index value of item past the index
1237                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1238                                         # Index value of bottom item in the list
1239                                         $lastIndex = $this->mHist[1]->getTimestamp();
1240                                         # Display range
1241                                         $this->mRange = array( 1, $numRows - 1 );
1242                                 } else {
1243                                         # Index value of item past the index
1244                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1245                                         # Index value of bottom item in the list
1246                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1247                                         # Display range
1248                                         $this->mRange = array( 0, $numRows - 2 );
1249                                 }
1250                         } else {
1251                                 # Setting indexes to an empty string means that they will be
1252                                 # omitted if they would otherwise appear in URLs. It just so
1253                                 # happens that this  is the right thing to do in the standard
1254                                 # UI, in all the relevant cases.
1255                                 $this->mPastTheEndIndex = '';
1256                                 # Index value of bottom item in the list
1257                                 $lastIndex = $this->mIsBackwards ?
1258                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1259                                 # Display range
1260                                 $this->mRange = array( 0, $numRows - 1 );
1261                         }
1262                 } else {
1263                         $firstIndex = '';
1264                         $lastIndex = '';
1265                         $this->mPastTheEndIndex = '';
1266                 }
1267                 if ( $this->mIsBackwards ) {
1268                         $this->mIsFirst = ( $numRows < $queryLimit );
1269                         $this->mIsLast = ( $this->mOffset == '' );
1270                         $this->mLastShown = $firstIndex;
1271                         $this->mFirstShown = $lastIndex;
1272                 } else {
1273                         $this->mIsFirst = ( $this->mOffset == '' );
1274                         $this->mIsLast = ( $numRows < $queryLimit );
1275                         $this->mLastShown = $lastIndex;
1276                         $this->mFirstShown = $firstIndex;
1277                 }
1278                 $this->mQueryDone = true;
1279         }
1280
1281         /**
1282          * @param $enable bool
1283          */
1284         protected function preventClickjacking( $enable = true ) {
1285                 $this->preventClickjacking = $enable;
1286         }
1287
1288         /**
1289          * @return bool
1290          */
1291         public function getPreventClickjacking() {
1292                 return $this->preventClickjacking;
1293         }
1294
1295 }