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