includes/ImagePage.php

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