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                 $sk = $wgUser->getSkin();
 276                 $dirmark = $wgLang->getDirMark();
 277
 278                 if ( $this->displayImg->exists() ) {
 279                         # image
 280                         $page = $wgRequest->getIntOrNull( 'page' );
 281                         if ( is_null( $page ) ) {
 282                                 $params = array();
 283                                 $page = 1;
 284                         } else {
 285                                 $params = array( 'page' => $page );
 286                         }
 287                         $width_orig = $this->displayImg->getWidth( $page );
 288                         $width = $width_orig;
 289                         $height_orig = $this->displayImg->getHeight( $page );
 290                         $height = $height_orig;
 291
 292                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 293
 294                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 295
 296                         if ( $this->displayImg->allowInlineDisplay() ) {
 297                                 # image
 298
 299                                 # "Download high res version" link below the image
 300                                 # $msgsize = wfMsgHtml( 'file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 301                                 # We'll show a thumbnail of this image
 302                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 303                                         # Calculate the thumbnail size.
 304                                         # First case, the limiting factor is the width, not the height.
 305                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 306                                                 $height = round( $height * $maxWidth / $width );
 307                                                 $width = $maxWidth;
 308                                                 # Note that $height <= $maxHeight now.
 309                                         } else {
 310                                                 $newwidth = floor( $width * $maxHeight / $height );
 311                                                 $height = round( $height * $newwidth / $width );
 312                                                 $width = $newwidth;
 313                                                 # Note that $height <= $maxHeight now, but might not be identical
 314                                                 # because of rounding.
 315                                         }
 316                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 317                                         $otherSizes = array();
 318                                         foreach ( $wgImageLimits as $size ) {
 319                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig &&
 320                                                                 $size[0] != $width && $size[1] != $height ) {
 321                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 322                                                 }
 323                                         }
 324                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 325                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 326                                                 parse() . ' ' .
 327                                                 wfMessage( 'show-big-image-other' )->
 328                                                 rawParams( $wgLang->pipeList( $otherSizes ) )->parse();
 329                                 } else {
 330                                         # Image is small enough to show full size on image page
 331                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 332                                 }
 333
 334                                 $params['width'] = $width;
 335                                 $params['height'] = $height;
 336                                 $thumbnail = $this->displayImg->transform( $params );
 337
 338                                 $showLink = true;
 339                                 $anchorclose = '<br />' . $msgsmall;
 340
 341                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 342                                 if ( $isMulti ) {
 343                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 344                                 }
 345
 346                                 if ( $thumbnail ) {
 347                                         $options = array(
 348                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 349                                                 'file-link' => true,
 350                                         );
 351                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 352                                                 $thumbnail->toHtml( $options ) .
 353                                                 $anchorclose . "</div>\n" );
 354                                 }
 355
 356                                 if ( $isMulti ) {
 357                                         $count = $this->displayImg->pageCount();
 358
 359                                         if ( $page > 1 ) {
 360                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 361                                                 $link = $sk->link(
 362                                                         $this->getTitle(),
 363                                                         $label,
 364                                                         array(),
 365                                                         array( 'page' => $page - 1 ),
 366                                                         array( 'known', 'noclasses' )
 367                                                 );
 368                                                 $thumb1 = $sk->makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 369                                                         array( 'page' => $page - 1 ) );
 370                                         } else {
 371                                                 $thumb1 = '';
 372                                         }
 373
 374                                         if ( $page < $count ) {
 375                                                 $label = wfMsg( 'imgmultipagenext' );
 376                                                 $link = $sk->link(
 377                                                         $this->getTitle(),
 378                                                         $label,
 379                                                         array(),
 380                                                         array( 'page' => $page + 1 ),
 381                                                         array( 'known', 'noclasses' )
 382                                                 );
 383                                                 $thumb2 = $sk->makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 384                                                         array( 'page' => $page + 1 ) );
 385                                         } else {
 386                                                 $thumb2 = '';
 387                                         }
 388
 389                                         global $wgScript;
 390
 391                                         $formParams = array(
 392                                                 'name' => 'pageselector',
 393                                                 'action' => $wgScript,
 394                                                 'onchange' => 'document.pageselector.submit();',
 395                                         );
 396
 397                                         for ( $i = 1; $i <= $count; $i++ ) {
 398                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 399                                         }
 400                                         $select = Xml::tags( 'select',
 401                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 402                                                 implode( "\n", $options ) );
 403
 404                                         $wgOut->addHTML(
 405                                                 '</td><td><div class="multipageimagenavbox">' .
 406                                                 Xml::openElement( 'form', $formParams ) .
 407                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 408                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 409                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 410                                                 Xml::closeElement( 'form' ) .
 411                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 412                                         );
 413                                 }
 414                         } else {
 415                                 # if direct link is allowed but it's not a renderable image, show an icon.
 416                                 if ( $this->displayImg->isSafeFile() ) {
 417                                         $icon = $this->displayImg->iconThumb();
 418
 419                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 420                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 421                                                 "</div>\n" );
 422                                 }
 423
 424                                 $showLink = true;
 425                         }
 426
 427                         if ( $showLink ) {
 428                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 429                                 $linktext = $filename;
 430                                 if ( isset( $msgbig ) ) {
 431                                         $linktext = wfEscapeWikiText( $msgbig );
 432                                 }
 433                                 $medialink = "[[Media:$filename|$linktext]]";
 434
 435                                 if ( !$this->displayImg->isSafeFile() ) {
 436                                         $warning = wfMsgNoTrans( 'mediawarning' );
 437                                         $wgOut->addWikiText( <<<EOT
 438 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 439 <div class="mediaWarning">$warning</div>
 440 EOT
 441                                                 );
 442                                 } else {
 443                                         $wgOut->addWikiText( <<<EOT
 444 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 445 </div>
 446 EOT
 447                                         );
 448                                 }
 449                         }
 450
 451                         if ( !$this->displayImg->isLocal() ) {
 452                                 $this->printSharedImageText();
 453                         }
 454                 } else {
 455                         # Image does not exist
 456                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 457                                 // Only show an upload link if the user can upload
 458                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 459                                 $nofile = array(
 460                                         'filepage-nofile-link',
 461                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 462                                 );
 463                         } else {
 464                                 $nofile = 'filepage-nofile';
 465                         }
 466                         // Note, if there is an image description page, but
 467                         // no image, then this setRobotPolicy is overriden
 468                         // by Article::View().
 469                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 470                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 471                         if ( !$this->getID() ) {
 472                                 // If there is no image, no shared image, and no description page,
 473                                 // output a 404, to be consistent with articles.
 474                                 $wgRequest->response()->header( 'HTTP/1.1 404 Not Found' );
 475                         }
 476                 }
 477                 $wgOut->setFileVersion( $this->displayImg );
 478         }
 479
 480         /**
 481          * Creates an thumbnail of specified size and returns an HTML link to it
 482          * @param array $params Scaler parameters
 483          * @param int $width
 484          * @param int $height
 485          */
 486         private function makeSizeLink( $params, $width, $height ) {
 487                 $params['width'] = $width;
 488                 $params['height'] = $height;
 489                 $thumbnail = $this->displayImg->transform( $params );
 490                 if ( $thumbnail && !$thumbnail->isError() ) {
 491                         return Html::rawElement( 'a', array(
 492                                 'href' => $thumbnail->getUrl(),
 493                                 'class' => 'mw-thumbnail-link'
 494                                 ), wfMessage( 'show-big-image-size' )->numParams(
 495                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 496                                 )->parse() );
 497                 } else {
 498                         return '';
 499                 }
 500         }
 501
 502         /**
 503          * Show a notice that the file is from a shared repository
 504          */
 505         protected function printSharedImageText() {
 506                 global $wgOut;
 507
 508                 $this->loadFile();
 509
 510                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 511                 $descText = $this->mPage->getFile()->getDescriptionText();
 512
 513                 /* Add canonical to head if there is no local page for this shared file */
 514                 if( $descUrl && $this->mPage->getID() == 0 ) {
 515                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 516                 }
 517
 518                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 519                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 520
 521                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 522                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 523                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 524                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 525                 } else {
 526                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 527                 }
 528
 529                 if ( $descText ) {
 530                         $this->mExtraDescription = $descText;
 531                 }
 532         }
 533
 534         public function getUploadUrl() {
 535                 $this->loadFile();
 536                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 537                 return $uploadTitle->getFullURL( array(
 538                         'wpDestFile' => $this->mPage->getFile()->getName(),
 539                         'wpForReUpload' => 1
 540                  ) );
 541         }
 542
 543         /**
 544          * Print out the various links at the bottom of the image page, e.g. reupload,
 545          * external editing (and instructions link) etc.
 546          */
 547         protected function uploadLinksBox() {
 548                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 549
 550                 if ( !$wgEnableUploads ) {
 551                         return;
 552                 }
 553
 554                 $this->loadFile();
 555                 if ( !$this->mPage->getFile()->isLocal() ) {
 556                         return;
 557                 }
 558
 559                 $sk = $wgUser->getSkin();
 560
 561                 $wgOut->addHTML( "<br /><ul>\n" );
 562
 563                 # "Upload a new version of this file" link
 564                 if ( UploadBase::userCanReUpload( $wgUser, $this->mPage->getFile()->name ) ) {
 565                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 566                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 567                 }
 568
 569                 # External editing link
 570                 if ( $wgUseExternalEditor ) {
 571                         $elink = $sk->link(
 572                                 $this->getTitle(),
 573                                 wfMsgHtml( 'edit-externally' ),
 574                                 array(),
 575                                 array(
 576                                         'action' => 'edit',
 577                                         'externaledit' => 'true',
 578                                         'mode' => 'file'
 579                                 ),
 580                                 array( 'known', 'noclasses' )
 581                         );
 582                         $wgOut->addHTML(
 583                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 584                                 wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) .
 585                                 "</small></li>\n"
 586                         );
 587                 }
 588
 589                 $wgOut->addHTML( "</ul>\n" );
 590         }
 591
 592         protected function closeShowImage() { } # For overloading
 593
 594         /**
 595          * If the page we've just displayed is in the "Image" namespace,
 596          * we follow it with an upload history of the image and its usage.
 597          */
 598         protected function imageHistory() {
 599                 global $wgOut;
 600
 601                 $this->loadFile();
 602                 $pager = new ImageHistoryPseudoPager( $this );
 603                 $wgOut->addHTML( $pager->getBody() );
 604                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 605
 606                 $this->mPage->getFile()->resetHistory(); // free db resources
 607
 608                 # Exist check because we don't want to show this on pages where an image
 609                 # doesn't exist along with the noimage message, that would suck. -ævar
 610                 if ( $this->mPage->getFile()->exists() ) {
 611                         $this->uploadLinksBox();
 612                 }
 613         }
 614
 615         protected function queryImageLinks( $target, $limit ) {
 616                 $dbr = wfGetDB( DB_SLAVE );
 617
 618                 return $dbr->select(
 619                         array( 'imagelinks', 'page' ),
 620                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 621                         array( 'il_to' => $target, 'il_from = page_id' ),
 622                         __METHOD__,
 623                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 624                 );
 625         }
 626
 627         protected function imageLinks() {
 628                 global $wgUser, $wgOut, $wgLang;
 629
 630                 $limit = 100;
 631
 632                 $res = $this->queryImageLinks( $this->getTitle()->getDbKey(), $limit + 1);
 633                 $rows = array();
 634                 $redirects = array();
 635                 foreach ( $res as $row ) {
 636                         if ( $row->page_is_redirect ) {
 637                                 $redirects[$row->page_title] = array();
 638                         }
 639                         $rows[] = $row;
 640                 }
 641                 $count = count( $rows );
 642
 643                 $hasMore = $count > $limit;
 644                 if ( !$hasMore && count( $redirects ) ) {
 645                         $res = $this->queryImageLinks( array_keys( $redirects ),
 646                                 $limit - count( $rows ) + 1 );
 647                         foreach ( $res as $row ) {
 648                                 $redirects[$row->il_to][] = $row;
 649                                 $count++;
 650                         }
 651                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 652                 }
 653
 654                 if ( $count == 0 ) {
 655                         $wgOut->wrapWikiMsg(
 656                                 Html::rawElement( 'div',
 657                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 658                                 'nolinkstoimage'
 659                         );
 660                         return;
 661                 }
 662
 663                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 664                 if ( !$hasMore ) {
 665                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 666                 } else {
 667                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 668                         $wgOut->addWikiMsg( 'linkstoimage-more',
 669                                 $wgLang->formatNum( $limit ),
 670                                 $this->getTitle()->getPrefixedDBkey()
 671                         );
 672                 }
 673
 674                 $wgOut->addHTML(
 675                         Html::openElement( 'ul',
 676                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 677                 );
 678                 $sk = $wgUser->getSkin();
 679                 $count = 0;
 680
 681                 // Sort the list by namespace:title
 682                 usort( $rows, array( $this, 'compare' ) );
 683
 684                 // Create links for every element
 685                 $currentCount = 0;
 686                 foreach( $rows as $element ) {
 687                         $currentCount++;
 688                         if ( $currentCount > $limit ) {
 689                                 break;
 690                         }
 691
 692                         $link = $sk->linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 693                         if ( !isset( $redirects[$element->page_title] ) ) {
 694                                 $liContents = $link;
 695                         } else {
 696                                 $ul = "<ul class='mw-imagepage-redirectstofile'>\n";
 697                                 foreach ( $redirects[$element->page_title] as $row ) {
 698                                         $currentCount++;
 699                                         if ( $currentCount > $limit ) {
 700                                                 break;
 701                                         }
 702
 703                                         $link2 = $sk->linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 704                                         $ul .= Html::rawElement(
 705                                                 'li',
 706                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 707                                                 $link2
 708                                                 ) . "\n";
 709                                 }
 710                                 $ul .= '</ul>';
 711                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 712                                         $link, $ul )->parse();
 713                         }
 714                         $wgOut->addHTML( Html::rawElement(
 715                                         'li',
 716                                         array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 717                                         $liContents
 718                                 ) . "\n"
 719                         );
 720
 721                 };
 722                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 723                 $res->free();
 724
 725                 // Add a links to [[Special:Whatlinkshere]]
 726                 if ( $count > $limit ) {
 727                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 728                 }
 729                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 730         }
 731
 732         protected function imageDupes() {
 733                 global $wgOut, $wgUser, $wgLang;
 734
 735                 $this->loadFile();
 736
 737                 $dupes = $this->mPage->getDuplicates();
 738                 if ( count( $dupes ) == 0 ) {
 739                         return;
 740                 }
 741
 742                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 743                 $wgOut->addWikiMsg( 'duplicatesoffile',
 744                         $wgLang->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 745                 );
 746                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 747
 748                 $sk = $wgUser->getSkin();
 749                 foreach ( $dupes as $file ) {
 750                         $fromSrc = '';
 751                         if ( $file->isLocal() ) {
 752                                 $link = $sk->link(
 753                                         $file->getTitle(),
 754                                         null,
 755                                         array(),
 756                                         array(),
 757                                         array( 'known', 'noclasses' )
 758                                 );
 759                         } else {
 760                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 761                                         $file->getTitle()->getPrefixedText() );
 762                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 763                         }
 764                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 765                 }
 766                 $wgOut->addHTML( "</ul></div>\n" );
 767         }
 768
 769         /**
 770          * Delete the file, or an earlier version of it
 771          */
 772         public function delete() {
 773                 global $wgUploadMaintenance;
 774                 if ( $wgUploadMaintenance && $this->getTitle() && $this->getTitle()->getNamespace() == NS_FILE ) {
 775                         global $wgOut;
 776                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
 777                         return;
 778                 }
 779
 780                 $this->loadFile();
 781                 if ( !$this->mPage->getFile()->exists() || !$this->mPage->getFile()->isLocal() || $this->mPage->getFile()->getRedirected() ) {
 782                         // Standard article deletion
 783                         parent::delete();
 784                         return;
 785                 }
 786                 $deleter = new FileDeleteForm( $this->mPage->getFile() );
 787                 $deleter->execute();
 788         }
 789
 790         /**
 791          * Display an error with a wikitext description
 792          */
 793         function showError( $description ) {
 794                 global $wgOut;
 795                 $wgOut->setPageTitle( wfMsg( 'internalerror' ) );
 796                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 797                 $wgOut->setArticleRelated( false );
 798                 $wgOut->enableClientCache( false );
 799                 $wgOut->addWikiText( $description );
 800         }
 801
 802         /**
 803          * Callback for usort() to do link sorts by (namespace, title)
 804          * Function copied from Title::compare()
 805          *
 806          * @param $a object page to compare with
 807          * @param $b object page to compare with
 808          * @return Integer: result of string comparison, or namespace comparison
 809          */
 810         protected function compare( $a, $b ) {
 811                 if ( $a->page_namespace == $b->page_namespace ) {
 812                         return strcmp( $a->page_title, $b->page_title );
 813                 } else {
 814                         return $a->page_namespace - $b->page_namespace;
 815                 }
 816         }
 817 }
 818
 819 /**
 820  * Builds the image revision log shown on image pages
 821  *
 822  * @ingroup Media
 823  */
 824 class ImageHistoryList {
 825
 826         /**
 827          * @var Title
 828          */
 829         protected $title;
 830
 831         /**
 832          * @var File
 833          */
 834         protected $img;
 835
 836         /**
 837          * @var ImagePage
 838          */
 839         protected $imagePage;
 840
 841         /**
 842          * @var Skin
 843          */
 844         protected $skin;
 845
 846         protected $repo, $showThumb;
 847         protected $preventClickjacking = false;
 848
 849         /**
 850          * @param ImagePage $imagePage
 851          */
 852         public function __construct( $imagePage ) {
 853                 global $wgUser, $wgShowArchiveThumbnails;
 854                 $this->skin = $wgUser->getSkin();
 855                 $this->current = $imagePage->getFile();
 856                 $this->img = $imagePage->getDisplayedFile();
 857                 $this->title = $imagePage->getTitle();
 858                 $this->imagePage = $imagePage;
 859                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 860         }
 861
 862         public function getImagePage() {
 863                 return $this->imagePage;
 864         }
 865
 866         public function getSkin() {
 867                 return $this->skin;
 868         }
 869
 870         public function getFile() {
 871                 return $this->img;
 872         }
 873
 874         public function beginImageHistoryList( $navLinks = '' ) {
 875                 global $wgOut, $wgUser;
 876                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 877                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 878                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 879                         . $navLinks . "\n"
 880                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 881                         . '<tr><td></td>'
 882                         . ( $this->current->isLocal() && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 883                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 884                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 885                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 886                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 887                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 888                         . "</tr>\n";
 889         }
 890
 891         public function endImageHistoryList( $navLinks = '' ) {
 892                 return "</table>\n$navLinks\n</div>\n";
 893         }
 894
 895         /**
 896          * @param $iscur
 897          * @param $file File
 898          * @return string
 899          */
 900         public function imageHistoryLine( $iscur, $file ) {
 901                 global $wgUser, $wgLang;
 902
 903                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 904                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 905                 $user = $file->getUser( 'id' );
 906                 $usertext = $file->getUser( 'text' );
 907                 $description = $file->getDescription();
 908
 909                 $local = $this->current->isLocal();
 910                 $row = $selected = '';
 911
 912                 // Deletion link
 913                 if ( $local && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
 914                         $row .= '<td>';
 915                         # Link to remove from history
 916                         if ( $wgUser->isAllowed( 'delete' ) ) {
 917                                 $q = array( 'action' => 'delete' );
 918                                 if ( !$iscur ) {
 919                                         $q['oldimage'] = $img;
 920                                 }
 921                                 $row .= $this->skin->link(
 922                                         $this->title,
 923                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 924                                         array(), $q, array( 'known' )
 925                                 );
 926                         }
 927                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 928                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 929                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 930                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 931                                         $row .= '<br />';
 932                                 }
 933                                 // If file is top revision or locked from this user, don't link
 934                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 935                                         $del = $this->skin->revDeleteLinkDisabled( $canHide );
 936                                 } else {
 937                                         list( $ts, $name ) = explode( '!', $img, 2 );
 938                                         $query = array(
 939                                                 'type'   => 'oldimage',
 940                                                 'target' => $this->title->getPrefixedText(),
 941                                                 'ids'    => $ts,
 942                                         );
 943                                         $del = $this->skin->revDeleteLink( $query,
 944                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 945                                 }
 946                                 $row .= $del;
 947                         }
 948                         $row .= '</td>';
 949                 }
 950
 951                 // Reversion link/current indicator
 952                 $row .= '<td>';
 953                 if ( $iscur ) {
 954                         $row .= wfMsgHtml( 'filehist-current' );
 955                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 956                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 957                                 $row .= wfMsgHtml( 'filehist-revert' );
 958                         } else {
 959                                 $row .= $this->skin->link(
 960                                         $this->title,
 961                                         wfMsgHtml( 'filehist-revert' ),
 962                                         array(),
 963                                         array(
 964                                                 'action' => 'revert',
 965                                                 'oldimage' => $img,
 966                                                 'wpEditToken' => $wgUser->editToken( $img )
 967                                         ),
 968                                         array( 'known', 'noclasses' )
 969                                 );
 970                         }
 971                 }
 972                 $row .= '</td>';
 973
 974                 // Date/time and image link
 975                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
 976                         $selected = "class='filehistory-selected'";
 977                 }
 978                 $row .= "<td $selected style='white-space: nowrap;'>";
 979                 if ( !$file->userCan( File::DELETED_FILE ) ) {
 980                         # Don't link to unviewable files
 981                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 982                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
 983                         if ( $local ) {
 984                                 $this->preventClickjacking();
 985                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 986                                 # Make a link to review the image
 987                                 $url = $this->skin->link(
 988                                         $revdel,
 989                                         $wgLang->timeAndDate( $timestamp, true ),
 990                                         array(),
 991                                         array(
 992                                                 'target' => $this->title->getPrefixedText(),
 993                                                 'file' => $img,
 994                                                 'token' => $wgUser->editToken( $img )
 995                                         ),
 996                                         array( 'known', 'noclasses' )
 997                                 );
 998                         } else {
 999                                 $url = $wgLang->timeAndDate( $timestamp, true );
1000                         }
1001                         $row .= '<span class="history-deleted">' . $url . '</span>';
1002                 } else {
1003                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1004                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
1005                 }
1006                 $row .= "</td>";
1007
1008                 // Thumbnail
1009                 if ( $this->showThumb ) {
1010                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1011                 }
1012
1013                 // Image dimensions + size
1014                 $row .= '<td>';
1015                 $row .= htmlspecialchars( $file->getDimensionsString() );
1016                 $row .= ' <span style="white-space: nowrap;">(' . $this->skin->formatSize( $file->getSize() ) . ')</span>';
1017                 $row .= '</td>';
1018
1019                 // Uploading user
1020                 $row .= '<td>';
1021                 // Hide deleted usernames
1022                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1023                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1024                 } else {
1025                         if ( $local ) {
1026                                 $row .= $this->skin->userLink( $user, $usertext ) . ' <span style="white-space: nowrap;">' .
1027                                 $this->skin->userToolLinks( $user, $usertext ) . '</span>';
1028                         } else {
1029                                 $row .= htmlspecialchars( $usertext );
1030                         }
1031                 }
1032                 $row .= '</td><td>';
1033
1034                 // Don't show deleted descriptions
1035                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1036                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
1037                 } else {
1038                         $row .= $this->skin->commentBlock( $description, $this->title );
1039                 }
1040                 $row .= '</td>';
1041
1042                 $rowClass = null;
1043                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1044                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1045
1046                 return "<tr{$classAttr}>{$row}</tr>\n";
1047         }
1048
1049         /**
1050          * @param $file File
1051          * @return string
1052          */
1053         protected function getThumbForLine( $file ) {
1054                 global $wgLang;
1055
1056                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1057                         $params = array(
1058                                 'width' => '120',
1059                                 'height' => '120',
1060                         );
1061                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1062
1063                         $thumbnail = $file->transform( $params );
1064                         $options = array(
1065                                 'alt' => wfMsg( 'filehist-thumbtext',
1066                                         $wgLang->timeAndDate( $timestamp, true ),
1067                                         $wgLang->date( $timestamp, true ),
1068                                         $wgLang->time( $timestamp, true ) ),
1069                                 'file-link' => true,
1070                         );
1071
1072                         if ( !$thumbnail ) {
1073                                 return wfMsgHtml( 'filehist-nothumb' );
1074                         }
1075
1076                         return $thumbnail->toHtml( $options );
1077                 } else {
1078                         return wfMsgHtml( 'filehist-nothumb' );
1079                 }
1080         }
1081
1082         protected function preventClickjacking( $enable = true ) {
1083                 $this->preventClickjacking = $enable;
1084         }
1085
1086         public function getPreventClickjacking() {
1087                 return $this->preventClickjacking;
1088         }
1089 }
1090
1091 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1092         protected $preventClickjacking = false;
1093
1094         /**
1095          * @var File
1096          */
1097         protected $mImg;
1098
1099         /**
1100          * @var Title
1101          */
1102         protected $mTitle;
1103
1104         /**
1105          * @param ImagePage $imagePage
1106          */
1107         function __construct( $imagePage ) {
1108                 parent::__construct();
1109                 $this->mImagePage = $imagePage;
1110                 $this->mTitle = clone ( $imagePage->getTitle() );
1111                 $this->mTitle->setFragment( '#filehistory' );
1112                 $this->mImg = null;
1113                 $this->mHist = array();
1114                 $this->mRange = array( 0, 0 ); // display range
1115         }
1116
1117         function getTitle() {
1118                 return $this->mTitle;
1119         }
1120
1121         function getQueryInfo() {
1122                 return false;
1123         }
1124
1125         function getIndexField() {
1126                 return '';
1127         }
1128
1129         function formatRow( $row ) {
1130                 return '';
1131         }
1132
1133         function getBody() {
1134                 $s = '';
1135                 $this->doQuery();
1136                 if ( count( $this->mHist ) ) {
1137                         $list = new ImageHistoryList( $this->mImagePage );
1138                         # Generate prev/next links
1139                         $navLink = $this->getNavigationBar();
1140                         $s = $list->beginImageHistoryList( $navLink );
1141                         // Skip rows there just for paging links
1142                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1143                                 $file = $this->mHist[$i];
1144                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1145                         }
1146                         $s .= $list->endImageHistoryList( $navLink );
1147
1148                         if ( $list->getPreventClickjacking() ) {
1149                                 $this->preventClickjacking();
1150                         }
1151                 }
1152                 return $s;
1153         }
1154
1155         function doQuery() {
1156                 if ( $this->mQueryDone ) {
1157                         return;
1158                 }
1159                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1160                 if ( !$this->mImg->exists() ) {
1161                         return;
1162                 }
1163                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1164                 if ( $this->mIsBackwards ) {
1165                         // Fetch the file history
1166                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1167                         // The current rev may not meet the offset/limit
1168                         $numRows = count( $this->mHist );
1169                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1170                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1171                         }
1172                 } else {
1173                         // The current rev may not meet the offset
1174                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1175                                 $this->mHist[] = $this->mImg;
1176                         }
1177                         // Old image versions (fetch extra row for nav links)
1178                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1179                         // Fetch the file history
1180                         $this->mHist = array_merge( $this->mHist,
1181                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1182                 }
1183                 $numRows = count( $this->mHist ); // Total number of query results
1184                 if ( $numRows ) {
1185                         # Index value of top item in the list
1186                         $firstIndex = $this->mIsBackwards ?
1187                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1188                         # Discard the extra result row if there is one
1189                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1190                                 if ( $this->mIsBackwards ) {
1191                                         # Index value of item past the index
1192                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1193                                         # Index value of bottom item in the list
1194                                         $lastIndex = $this->mHist[1]->getTimestamp();
1195                                         # Display range
1196                                         $this->mRange = array( 1, $numRows - 1 );
1197                                 } else {
1198                                         # Index value of item past the index
1199                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1200                                         # Index value of bottom item in the list
1201                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1202                                         # Display range
1203                                         $this->mRange = array( 0, $numRows - 2 );
1204                                 }
1205                         } else {
1206                                 # Setting indexes to an empty string means that they will be
1207                                 # omitted if they would otherwise appear in URLs. It just so
1208                                 # happens that this  is the right thing to do in the standard
1209                                 # UI, in all the relevant cases.
1210                                 $this->mPastTheEndIndex = '';
1211                                 # Index value of bottom item in the list
1212                                 $lastIndex = $this->mIsBackwards ?
1213                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1214                                 # Display range
1215                                 $this->mRange = array( 0, $numRows - 1 );
1216                         }
1217                 } else {
1218                         $firstIndex = '';
1219                         $lastIndex = '';
1220                         $this->mPastTheEndIndex = '';
1221                 }
1222                 if ( $this->mIsBackwards ) {
1223                         $this->mIsFirst = ( $numRows < $queryLimit );
1224                         $this->mIsLast = ( $this->mOffset == '' );
1225                         $this->mLastShown = $firstIndex;
1226                         $this->mFirstShown = $lastIndex;
1227                 } else {
1228                         $this->mIsFirst = ( $this->mOffset == '' );
1229                         $this->mIsLast = ( $numRows < $queryLimit );
1230                         $this->mLastShown = $lastIndex;
1231                         $this->mFirstShown = $firstIndex;
1232                 }
1233                 $this->mQueryDone = true;
1234         }
1235
1236         protected function preventClickjacking( $enable = true ) {
1237                 $this->preventClickjacking = $enable;
1238         }
1239
1240         public function getPreventClickjacking() {
1241                 return $this->preventClickjacking;
1242         }
1243
1244 }