includes/ImagePage.php

   1 <?php
   2
   3 /**
   4  * Special handling for image description pages
   5  *
   6  * @ingroup Media
   7  */
   8 class ImagePage extends Article {
   9
  10         /**
  11          * @var File
  12          */
  13         /* private */ var $img;
  14         /**
  15          * @var File
  16          */
  17         /* private */ var $displayImg;
  18         /* private */ var $repo;
  19         /* private */ var $fileLoaded;
  20
  21         var $mExtraDescription = false;
  22         var $dupes;
  23
  24         function __construct( $title ) {
  25                 parent::__construct( $title );
  26                 $this->dupes = null;
  27                 $this->repo = null;
  28         }
  29
  30         /**
  31          * @param  $file File:
  32          * @return void
  33          */
  34         public function setFile( $file ) {
  35                 $this->displayImg = $file;
  36                 $this->img = $file;
  37                 $this->fileLoaded = true;
  38         }
  39
  40         protected function loadFile() {
  41                 if ( $this->fileLoaded ) {
  42                         return true;
  43                 }
  44                 $this->fileLoaded = true;
  45
  46                 $this->displayImg = $this->img = false;
  47                 wfRunHooks( 'ImagePageFindFile', array( $this, &$this->img, &$this->displayImg ) );
  48                 if ( !$this->img ) {
  49                         $this->img = wfFindFile( $this->mTitle );
  50                         if ( !$this->img ) {
  51                                 $this->img = wfLocalFile( $this->mTitle );
  52                         }
  53                 }
  54                 if ( !$this->displayImg ) {
  55                         $this->displayImg = $this->img;
  56                 }
  57                 $this->repo = $this->img->getRepo();
  58         }
  59
  60         /**
  61          * Handler for action=render
  62          * Include body text only; none of the image extras
  63          */
  64         public function render() {
  65                 global $wgOut;
  66                 $wgOut->setArticleBodyOnly( true );
  67                 parent::view();
  68         }
  69
  70         public function view() {
  71                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  72
  73                 $diff = $wgRequest->getVal( 'diff' );
  74                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  75
  76                 if ( $this->mTitle->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  77                         return parent::view();
  78                 }
  79
  80                 $this->loadFile();
  81
  82                 if ( $this->mTitle->getNamespace() == NS_FILE && $this->img->getRedirected() ) {
  83                         if ( $this->mTitle->getDBkey() == $this->img->getName() || isset( $diff ) ) {
  84                                 // mTitle is the same as the redirect target so ask Article
  85                                 // to perform the redirect for us.
  86                                 $wgRequest->setVal( 'diffonly', 'true' );
  87                                 return parent::view();
  88                         } else {
  89                                 // mTitle is not the same as the redirect target so it is
  90                                 // probably the redirect page itself. Fake the redirect symbol
  91                                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  92                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->img->getName() ),
  93                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
  94                                 $this->viewUpdates();
  95                                 return;
  96                         }
  97                 }
  98
  99                 $this->showRedirectedFromHeader();
 100
 101                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 102                         // FIXME: bad interface, see note on MediaHandler::formatMetadata().
 103                         $formattedMetadata = $this->displayImg->formatMetadata();
 104                         $showmeta = $formattedMetadata !== false;
 105                 } else {
 106                         $showmeta = false;
 107                 }
 108
 109                 if ( !$diff && $this->displayImg->exists() )
 110                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 111
 112                 if ( !$diff )
 113                         $this->openShowImage();
 114
 115                 # No need to display noarticletext, we use our own message, output in openShowImage()
 116                 if ( $this->getID() ) {
 117                         parent::view();
 118                 } else {
 119                         # Just need to set the right headers
 120                         $wgOut->setArticleFlag( true );
 121                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 122                         $this->viewUpdates();
 123                 }
 124
 125                 # Show shared description, if needed
 126                 if ( $this->mExtraDescription ) {
 127                         $fol = wfMessage( 'shareddescriptionfollows' );
 128                         if ( !$fol->isDisabled() ) {
 129                                 $wgOut->addWikiText( $fol->plain() );
 130                         }
 131                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 132                 }
 133
 134                 $this->closeShowImage();
 135                 $this->imageHistory();
 136                 // TODO: Cleanup the following
 137
 138                 $wgOut->addHTML( Xml::element( 'h2',
 139                         array( 'id' => 'filelinks' ),
 140                         wfMsg( 'imagelinks' ) ) . "\n" );
 141                 $this->imageDupes();
 142                 # TODO! FIXME! For some freaky reason, we can't redirect to foreign images.
 143                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 144                 $this->imageRedirects();
 145                 $this->imageLinks();
 146
 147                 # Allow extensions to add something after the image links
 148                 $html = '';
 149                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 150                 if ( $html )
 151                         $wgOut->addHTML( $html );
 152
 153                 if ( $showmeta ) {
 154                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 155                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 156                         $wgOut->addModules( array( 'mediawiki.legacy.metadata' ) );
 157                 }
 158
 159                 $css = $this->repo->getDescriptionStylesheetUrl();
 160                 if ( $css ) {
 161                         $wgOut->addStyle( $css );
 162                 }
 163         }
 164
 165         public function getRedirectTarget() {
 166                 $this->loadFile();
 167                 if ( $this->img->isLocal() ) {
 168                         return parent::getRedirectTarget();
 169                 }
 170                 // Foreign image page
 171                 $from = $this->img->getRedirected();
 172                 $to = $this->img->getName();
 173                 if ( $from == $to ) {
 174                         return null;
 175                 }
 176                 return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
 177         }
 178
 179         public function followRedirect() {
 180                 $this->loadFile();
 181                 if ( $this->img->isLocal() ) {
 182                         return parent::followRedirect();
 183                 }
 184                 $from = $this->img->getRedirected();
 185                 $to = $this->img->getName();
 186                 if ( $from == $to ) {
 187                         return false;
 188                 }
 189                 return Title::makeTitle( NS_FILE, $to );
 190         }
 191
 192         public function isRedirect( $text = false ) {
 193                 $this->loadFile();
 194                 if ( $this->img->isLocal() )
 195                         return parent::isRedirect( $text );
 196
 197                 return (bool)$this->img->getRedirected();
 198         }
 199
 200         public function isLocal() {
 201                 $this->loadFile();
 202                 return $this->img->isLocal();
 203         }
 204
 205         public function getFile() {
 206                 $this->loadFile();
 207                 return $this->img;
 208         }
 209
 210         public function getDisplayedFile() {
 211                 $this->loadFile();
 212                 return $this->displayImg;
 213         }
 214
 215         public function getDuplicates() {
 216                 $this->loadFile();
 217                 if ( !is_null( $this->dupes ) ) {
 218                         return $this->dupes;
 219                 }
 220                 if ( !( $hash = $this->img->getSha1() ) ) {
 221                         return $this->dupes = array();
 222                 }
 223                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 224                 // Remove duplicates with self and non matching file sizes
 225                 $self = $this->img->getRepoName() . ':' . $this->img->getName();
 226                 $size = $this->img->getSize();
 227                 foreach ( $dupes as $index => $file ) {
 228                         $key = $file->getRepoName() . ':' . $file->getName();
 229                         if ( $key == $self )
 230                                 unset( $dupes[$index] );
 231                         if ( $file->getSize() != $size )
 232                                 unset( $dupes[$index] );
 233                 }
 234                 return $this->dupes = $dupes;
 235
 236         }
 237
 238         /**
 239          * Create the TOC
 240          *
 241          * @param $metadata Boolean: whether or not to show the metadata link
 242          * @return String
 243          */
 244         protected function showTOC( $metadata ) {
 245                 $r = array(
 246                                 '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 247                                 '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 248                                 '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 249                 );
 250                 if ( $metadata ) {
 251                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 252                 }
 253
 254                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 255
 256                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 257         }
 258
 259         /**
 260          * Make a table with metadata to be shown in the output page.
 261          *
 262          * FIXME: bad interface, see note on MediaHandler::formatMetadata().
 263          *
 264          * @param $metadata Array: the array containing the EXIF data
 265          * @return String
 266          */
 267         protected function makeMetadataTable( $metadata ) {
 268                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 269                 $r .= wfMsgNoTrans( 'metadata-help' );
 270                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 271                 foreach ( $metadata as $type => $stuff ) {
 272                         foreach ( $stuff as $v ) {
 273                                 # FIXME, why is this using escapeId for a class?!
 274                                 $class = Sanitizer::escapeId( $v['id'] );
 275                                 if ( $type == 'collapsed' ) {
 276                                         $class .= ' collapsable';
 277                                 }
 278                                 $r .= "<tr class=\"$class\">\n";
 279                                 $r .= "<th>{$v['name']}</th>\n";
 280                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 281                         }
 282                 }
 283                 $r .= "</table>\n</div>\n";
 284                 return $r;
 285         }
 286
 287         /**
 288          * Overloading Article's getContent method.
 289          *
 290          * Omit noarticletext if sharedupload; text will be fetched from the
 291          * shared upload server if possible.
 292          */
 293         public function getContent() {
 294                 $this->loadFile();
 295                 if ( $this->img && !$this->img->isLocal() && 0 == $this->getID() ) {
 296                         return '';
 297                 }
 298                 return parent::getContent();
 299         }
 300
 301         protected function openShowImage() {
 302                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 303                         $wgLang, $wgContLang, $wgEnableUploads;
 304
 305                 $this->loadFile();
 306
 307                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 308                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 309                         $sizeSel = User::getDefaultOption( 'imagesize' );
 310
 311                         // The user offset might still be incorrect, specially if
 312                         // $wgImageLimits got changed (see bug #8858).
 313                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 314                                 // Default to the first offset in $wgImageLimits
 315                                 $sizeSel = 0;
 316                         }
 317                 }
 318                 $max = $wgImageLimits[$sizeSel];
 319                 $maxWidth = $max[0];
 320                 $maxHeight = $max[1];
 321                 $sk = $wgUser->getSkin();
 322                 $dirmark = $wgContLang->getDirMark();
 323
 324                 if ( $this->displayImg->exists() ) {
 325                         # image
 326                         $page = $wgRequest->getIntOrNull( 'page' );
 327                         if ( is_null( $page ) ) {
 328                                 $params = array();
 329                                 $page = 1;
 330                         } else {
 331                                 $params = array( 'page' => $page );
 332                         }
 333                         $width_orig = $this->displayImg->getWidth( $page );
 334                         $width = $width_orig;
 335                         $height_orig = $this->displayImg->getHeight( $page );
 336                         $height = $height_orig;
 337
 338                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 339
 340                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 341
 342                         if ( $this->displayImg->allowInlineDisplay() ) {
 343                                 # image
 344
 345                                 # "Download high res version" link below the image
 346                                 # $msgsize = wfMsgHtml('file-info-size', $width_orig, $height_orig, $sk->formatSize( $this->displayImg->getSize() ), $mime );
 347                                 # We'll show a thumbnail of this image
 348                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 349                                         # Calculate the thumbnail size.
 350                                         # First case, the limiting factor is the width, not the height.
 351                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 352                                                 $height = round( $height * $maxWidth / $width );
 353                                                 $width = $maxWidth;
 354                                                 # Note that $height <= $maxHeight now.
 355                                         } else {
 356                                                 $newwidth = floor( $width * $maxHeight / $height );
 357                                                 $height = round( $height * $newwidth / $width );
 358                                                 $width = $newwidth;
 359                                                 # Note that $height <= $maxHeight now, but might not be identical
 360                                                 # because of rounding.
 361                                         }
 362                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 363                                         $msgsmall = wfMsgExt( 'show-big-image-thumb', 'parseinline',
 364                                                 $wgLang->formatNum( $width ),
 365                                                 $wgLang->formatNum( $height )
 366                                         );
 367                                 } else {
 368                                         # Image is small enough to show full size on image page
 369                                         $msgsmall = wfMsgExt( 'file-nohires', array( 'parseinline' ) );
 370                                 }
 371
 372                                 $params['width'] = $width;
 373                                 $thumbnail = $this->displayImg->transform( $params );
 374
 375                                 $showLink = true;
 376                                 $anchorclose = "<br />" . $msgsmall;
 377
 378                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 379                                 if ( $isMulti ) {
 380                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 381                                 }
 382
 383                                 if ( $thumbnail ) {
 384                                         $options = array(
 385                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 386                                                 'file-link' => true,
 387                                         );
 388                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 389                                                 $thumbnail->toHtml( $options ) .
 390                                                 $anchorclose . "</div>\n" );
 391                                 }
 392
 393                                 if ( $isMulti ) {
 394                                         $count = $this->displayImg->pageCount();
 395
 396                                         if ( $page > 1 ) {
 397                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 398                                                 $link = $sk->link(
 399                                                         $this->mTitle,
 400                                                         $label,
 401                                                         array(),
 402                                                         array( 'page' => $page - 1 ),
 403                                                         array( 'known', 'noclasses' )
 404                                                 );
 405                                                 $thumb1 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 406                                                         array( 'page' => $page - 1 ) );
 407                                         } else {
 408                                                 $thumb1 = '';
 409                                         }
 410
 411                                         if ( $page < $count ) {
 412                                                 $label = wfMsg( 'imgmultipagenext' );
 413                                                 $link = $sk->link(
 414                                                         $this->mTitle,
 415                                                         $label,
 416                                                         array(),
 417                                                         array( 'page' => $page + 1 ),
 418                                                         array( 'known', 'noclasses' )
 419                                                 );
 420                                                 $thumb2 = $sk->makeThumbLinkObj( $this->mTitle, $this->displayImg, $link, $label, 'none',
 421                                                         array( 'page' => $page + 1 ) );
 422                                         } else {
 423                                                 $thumb2 = '';
 424                                         }
 425
 426                                         global $wgScript;
 427
 428                                         $formParams = array(
 429                                                 'name' => 'pageselector',
 430                                                 'action' => $wgScript,
 431                                                 'onchange' => 'document.pageselector.submit();',
 432                                         );
 433
 434                                         for ( $i = 1; $i <= $count; $i++ ) {
 435                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 436                                         }
 437                                         $select = Xml::tags( 'select',
 438                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 439                                                 implode( "\n", $options ) );
 440
 441                                         $wgOut->addHTML(
 442                                                 '</td><td><div class="multipageimagenavbox">' .
 443                                                 Xml::openElement( 'form', $formParams ) .
 444                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 445                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 446                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 447                                                 Xml::closeElement( 'form' ) .
 448                                                 "<hr />$thumb1\n$thumb2<br clear=\"all\" /></div></td></tr></table>"
 449                                         );
 450                                 }
 451                         } else {
 452                                 # if direct link is allowed but it's not a renderable image, show an icon.
 453                                 if ( $this->displayImg->isSafeFile() ) {
 454                                         $icon = $this->displayImg->iconThumb();
 455
 456                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 457                                         $icon->toHtml( array( 'file-link' => true ) ) .
 458                                         "</div>\n" );
 459                                 }
 460
 461                                 $showLink = true;
 462                         }
 463
 464
 465                         if ( $showLink ) {
 466                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 467                                 $linktext = $filename;
 468                                 if ( isset( $msgbig ) ) {
 469                                         $linktext = wfEscapeWikiText( $msgbig );
 470                                 }
 471                                 $medialink = "[[Media:$filename|$linktext]]";
 472
 473                                 if ( !$this->displayImg->isSafeFile() ) {
 474                                         $warning = wfMsgNoTrans( 'mediawarning' );
 475                                         $wgOut->addWikiText( <<<EOT
 476 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 477 <div class="mediaWarning">$warning</div>
 478 EOT
 479                                                 );
 480                                 } else {
 481                                         $wgOut->addWikiText( <<<EOT
 482 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 483 </div>
 484 EOT
 485                                         );
 486                                 }
 487                         }
 488
 489                         if ( !$this->displayImg->isLocal() ) {
 490                                 $this->printSharedImageText();
 491                         }
 492                 } else {
 493                         # Image does not exist
 494                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 495                                 // Only show an upload link if the user can upload
 496                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 497                                 $nofile = array(
 498                                         'filepage-nofile-link',
 499                                         $uploadTitle->getFullUrl( array( 'wpDestFile' => $this->img->getName() ) )
 500                                 );
 501                         }
 502                         else
 503                         {
 504                                 $nofile = 'filepage-nofile';
 505                         }
 506                         // Note, if there is an image description page, but
 507                         // no image, then this setRobotPolicy is overriden
 508                         // by Article::View().
 509                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 510                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 511                         if ( !$this->getID() ) {
 512                                 // If there is no image, no shared image, and no description page,
 513                                 // output a 404, to be consistent with articles.
 514                                 $wgRequest->response()->header( "HTTP/1.x 404 Not Found" );
 515                         }
 516                 }
 517         }
 518
 519         /**
 520          * Show a notice that the file is from a shared repository
 521          */
 522         protected function printSharedImageText() {
 523                 global $wgOut;
 524
 525                 $this->loadFile();
 526
 527                 $descUrl = $this->img->getDescriptionUrl();
 528                 $descText = $this->img->getDescriptionText();
 529
 530                 /* Add canonical to head if there is no local page for this shared file */
 531                 if( $descUrl && $this->getID() == 0 ) {
 532                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 533                 }
 534
 535                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 536                 $repo = $this->img->getRepo()->getDisplayName();
 537
 538                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 539                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 540                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 541                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 542                 } else {
 543                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 544                 }
 545
 546                 if ( $descText ) {
 547                         $this->mExtraDescription = $descText;
 548                 }
 549         }
 550
 551         public function getUploadUrl() {
 552                 $this->loadFile();
 553                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 554                 return $uploadTitle->getFullUrl( array(
 555                         'wpDestFile' => $this->img->getName(),
 556                         'wpForReUpload' => 1
 557                  ) );
 558         }
 559
 560         /**
 561          * Print out the various links at the bottom of the image page, e.g. reupload,
 562          * external editing (and instructions link) etc.
 563          */
 564         protected function uploadLinksBox() {
 565                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 566
 567                 if ( !$wgEnableUploads ) {
 568                         return;
 569                 }
 570
 571                 $this->loadFile();
 572                 if ( !$this->img->isLocal() )
 573                         return;
 574
 575                 $sk = $wgUser->getSkin();
 576
 577                 $wgOut->addHTML( "<br /><ul>\n" );
 578
 579                 # "Upload a new version of this file" link
 580                 if ( UploadBase::userCanReUpload( $wgUser, $this->img->name ) ) {
 581                         $ulink = $sk->makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 582                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 583                 }
 584
 585                 # External editing link
 586                 if ( $wgUseExternalEditor ) {
 587                         $elink = $sk->link(
 588                                 $this->mTitle,
 589                                 wfMsgHtml( 'edit-externally' ),
 590                                 array(),
 591                                 array(
 592                                         'action' => 'edit',
 593                                         'externaledit' => 'true',
 594                                         'mode' => 'file'
 595                                 ),
 596                                 array( 'known', 'noclasses' )
 597                         );
 598                         $wgOut->addHTML( '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' . wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) . "</small></li>\n" );
 599                 }
 600
 601                 $wgOut->addHTML( "</ul>\n" );
 602         }
 603
 604         protected function closeShowImage() { } # For overloading
 605
 606         /**
 607          * If the page we've just displayed is in the "Image" namespace,
 608          * we follow it with an upload history of the image and its usage.
 609          */
 610         protected function imageHistory() {
 611                 global $wgOut;
 612
 613                 $this->loadFile();
 614                 $pager = new ImageHistoryPseudoPager( $this );
 615                 $wgOut->addHTML( $pager->getBody() );
 616                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 617
 618                 $this->img->resetHistory(); // free db resources
 619
 620                 # Exist check because we don't want to show this on pages where an image
 621                 # doesn't exist along with the noimage message, that would suck. -ævar
 622                 if ( $this->img->exists() ) {
 623                         $this->uploadLinksBox();
 624                 }
 625         }
 626
 627         protected function imageLinks() {
 628                 global $wgUser, $wgOut, $wgLang;
 629
 630                 $limit = 100;
 631
 632                 $dbr = wfGetDB( DB_SLAVE );
 633
 634                 $res = $dbr->select(
 635                         array( 'imagelinks', 'page' ),
 636                         array( 'page_namespace', 'page_title' ),
 637                         array( 'il_to' => $this->mTitle->getDBkey(), 'il_from = page_id' ),
 638                         __METHOD__,
 639                         array( 'LIMIT' => $limit + 1 )
 640                 );
 641                 $count = $dbr->numRows( $res );
 642                 if ( $count == 0 ) {
 643                         $wgOut->wrapWikiMsg( Html::rawElement( 'div', array ( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ), 'nolinkstoimage' );
 644                         return;
 645                 }
 646
 647                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 648                 if ( $count <= $limit - 1 ) {
 649                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 650                 } else {
 651                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 652                         $wgOut->addWikiMsg( 'linkstoimage-more',
 653                                 $wgLang->formatNum( $limit ),
 654                                 $this->mTitle->getPrefixedDBkey()
 655                         );
 656                 }
 657
 658                 $wgOut->addHTML( Html::openElement( 'ul', array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n" );
 659                 $sk = $wgUser->getSkin();
 660                 $count = 0;
 661                 $elements = array();
 662                 foreach ( $res as $s ) {
 663                         $count++;
 664                         if ( $count <= $limit ) {
 665                                 // We have not yet reached the extra one that tells us there is more to fetch
 666                                 $elements[] =  $s;
 667                         }
 668                 }
 669
 670                 // Sort the list by namespace:title
 671                 usort ( $elements, array( $this, 'compare' ) );
 672
 673                 // Create links for every element
 674                 foreach( $elements as $element ) {
 675                         $link = $sk->linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 676                         $wgOut->addHTML( Html::rawElement(
 677                                                 'li',
 678                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 679                                                 $link
 680                                         ) . "\n"
 681                         );
 682
 683                 };
 684                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 685                 $res->free();
 686
 687                 // Add a links to [[Special:Whatlinkshere]]
 688                 if ( $count > $limit ) {
 689                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->mTitle->getPrefixedDBkey() );
 690                 }
 691                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 692         }
 693
 694         protected function imageRedirects() {
 695                 global $wgUser, $wgOut, $wgLang;
 696
 697                 $redirects = $this->getTitle()->getRedirectsHere( NS_FILE );
 698                 if ( count( $redirects ) == 0 ) return;
 699
 700                 $wgOut->addHTML( "<div id='mw-imagepage-section-redirectstofile'>\n" );
 701                 $wgOut->addWikiMsg( 'redirectstofile',
 702                         $wgLang->formatNum( count( $redirects ) )
 703                 );
 704                 $wgOut->addHTML( "<ul class='mw-imagepage-redirectstofile'>\n" );
 705
 706                 $sk = $wgUser->getSkin();
 707                 foreach ( $redirects as $title ) {
 708                         $link = $sk->link(
 709                                 $title,
 710                                 null,
 711                                 array(),
 712                                 array( 'redirect' => 'no' ),
 713                                 array( 'known', 'noclasses' )
 714                         );
 715                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 716                 }
 717                 $wgOut->addHTML( "</ul></div>\n" );
 718
 719         }
 720
 721         protected function imageDupes() {
 722                 global $wgOut, $wgUser, $wgLang;
 723
 724                 $this->loadFile();
 725
 726                 $dupes = $this->getDuplicates();
 727                 if ( count( $dupes ) == 0 ) {
 728                         return;
 729                 }
 730
 731                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 732                 $wgOut->addWikiMsg( 'duplicatesoffile',
 733                         $wgLang->formatNum( count( $dupes ) ), $this->mTitle->getDBkey()
 734                 );
 735                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 736
 737                 $sk = $wgUser->getSkin();
 738                 foreach ( $dupes as $file ) {
 739                         $fromSrc = '';
 740                         if ( $file->isLocal() ) {
 741                                 $link = $sk->link(
 742                                         $file->getTitle(),
 743                                         null,
 744                                         array(),
 745                                         array(),
 746                                         array( 'known', 'noclasses' )
 747                                 );
 748                         } else {
 749                                 $link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 750                                         $file->getTitle()->getPrefixedText() );
 751                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 752                         }
 753                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 754                 }
 755                 $wgOut->addHTML( "</ul></div>\n" );
 756         }
 757
 758         /**
 759          * Delete the file, or an earlier version of it
 760          */
 761         public function delete() {
 762                 global $wgUploadMaintenance;
 763                 if ( $wgUploadMaintenance && $this->mTitle && $this->mTitle->getNamespace() == NS_FILE ) {
 764                         global $wgOut;
 765                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
 766                         return;
 767                 }
 768
 769                 $this->loadFile();
 770                 if ( !$this->img->exists() || !$this->img->isLocal() || $this->img->getRedirected() ) {
 771                         // Standard article deletion
 772                         parent::delete();
 773                         return;
 774                 }
 775                 $deleter = new FileDeleteForm( $this->img );
 776                 $deleter->execute();
 777         }
 778
 779         /**
 780          * Revert the file to an earlier version
 781          */
 782         public function revert() {
 783                 $this->loadFile();
 784                 $reverter = new FileRevertForm( $this->img );
 785                 $reverter->execute();
 786         }
 787
 788         /**
 789          * Override handling of action=purge
 790          */
 791         public function doPurge() {
 792                 $this->loadFile();
 793                 if ( $this->img->exists() ) {
 794                         wfDebug( "ImagePage::doPurge purging " . $this->img->getName() . "\n" );
 795                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 796                         $update->doUpdate();
 797                         $this->img->upgradeRow();
 798                         $this->img->purgeCache();
 799                 } else {
 800                         wfDebug( "ImagePage::doPurge no image for " . $this->img->getName() . "; limiting purge to cache only\n" );
 801                         // even if the file supposedly doesn't exist, force any cached information
 802                         // to be updated (in case the cached information is wrong)
 803                         $this->img->purgeCache();
 804                 }
 805                 parent::doPurge();
 806         }
 807
 808         /**
 809          * Display an error with a wikitext description
 810          */
 811         function showError( $description ) {
 812                 global $wgOut;
 813                 $wgOut->setPageTitle( wfMsg( "internalerror" ) );
 814                 $wgOut->setRobotPolicy( "noindex,nofollow" );
 815                 $wgOut->setArticleRelated( false );
 816                 $wgOut->enableClientCache( false );
 817                 $wgOut->addWikiText( $description );
 818         }
 819
 820         /**
 821          * Callback for usort() to do link sorts by (namespace, title)
 822          * Function copied from Title::compare()
 823          *
 824          * @param $a object page to compare with
 825          * @param $b object page to compare with
 826          * @return Integer: result of string comparison, or namespace comparison
 827          */
 828         protected function compare( $a, $b ) {
 829                 if ( $a->page_namespace == $b->page_namespace ) {
 830                         return strcmp( $a->page_title, $b->page_title );
 831                 } else {
 832                         return $a->page_namespace - $b->page_namespace;
 833                 }
 834         }
 835 }
 836
 837 /**
 838  * Builds the image revision log shown on image pages
 839  *
 840  * @ingroup Media
 841  */
 842 class ImageHistoryList {
 843
 844         /**
 845          * @var Title
 846          */
 847         protected $title;
 848
 849         /**
 850          * @var File
 851          */
 852         protected $img;
 853
 854         /**
 855          * @var ImagePage
 856          */
 857         protected $imagePage;
 858
 859         /**
 860          * @var Skin
 861          */
 862         protected $skin;
 863
 864         protected $repo, $showThumb;
 865         protected $preventClickjacking = false;
 866
 867         /**
 868          * @param ImagePage $imagePage
 869          */
 870         public function __construct( $imagePage ) {
 871                 global $wgUser, $wgShowArchiveThumbnails;
 872                 $this->skin = $wgUser->getSkin();
 873                 $this->current = $imagePage->getFile();
 874                 $this->img = $imagePage->getDisplayedFile();
 875                 $this->title = $imagePage->getTitle();
 876                 $this->imagePage = $imagePage;
 877                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 878         }
 879
 880         public function getImagePage() {
 881                 return $this->imagePage;
 882         }
 883
 884         public function getSkin() {
 885                 return $this->skin;
 886         }
 887
 888         public function getFile() {
 889                 return $this->img;
 890         }
 891
 892         public function beginImageHistoryList( $navLinks = '' ) {
 893                 global $wgOut, $wgUser;
 894                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 895                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 896                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 897                         . $navLinks . "\n"
 898                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 899                         . '<tr><td></td>'
 900                         . ( $this->current->isLocal() && ( $wgUser->isAllowed( 'delete' ) || $wgUser->isAllowed( 'deletedhistory' ) ) ? '<td></td>' : '' )
 901                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 902                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 903                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 904                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 905                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 906                         . "</tr>\n";
 907         }
 908
 909         public function endImageHistoryList( $navLinks = '' ) {
 910                 return "</table>\n$navLinks\n</div>\n";
 911         }
 912
 913         /**
 914          * @param  $iscur
 915          * @param File $file
 916          * @return string
 917          */
 918         public function imageHistoryLine( $iscur, $file ) {
 919                 global $wgUser, $wgLang;
 920
 921                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 922                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 923                 $user = $file->getUser( 'id' );
 924                 $usertext = $file->getUser( 'text' );
 925                 $description = $file->getDescription();
 926
 927                 $local = $this->current->isLocal();
 928                 $row = $selected = '';
 929
 930                 // Deletion link
 931                 if ( $local && ( $wgUser->isAllowed( 'delete' ) || $wgUser->isAllowed( 'deletedhistory' ) ) ) {
 932                         $row .= '<td>';
 933                         # Link to remove from history
 934                         if ( $wgUser->isAllowed( 'delete' ) ) {
 935                                 $q = array( 'action' => 'delete' );
 936                                 if ( !$iscur )
 937                                         $q['oldimage'] = $img;
 938                                 $row .= $this->skin->link(
 939                                         $this->title,
 940                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 941                                         array(), $q, array( 'known' )
 942                                 );
 943                         }
 944                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 945                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 946                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 947                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 948                                         $row .= '<br />';
 949                                 }
 950                                 // If file is top revision or locked from this user, don't link
 951                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 952                                         $del = $this->skin->revDeleteLinkDisabled( $canHide );
 953                                 } else {
 954                                         list( $ts, $name ) = explode( '!', $img, 2 );
 955                                         $query = array(
 956                                                 'type'   => 'oldimage',
 957                                                 'target' => $this->title->getPrefixedText(),
 958                                                 'ids'    => $ts,
 959                                         );
 960                                         $del = $this->skin->revDeleteLink( $query,
 961                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 962                                 }
 963                                 $row .= $del;
 964                         }
 965                         $row .= '</td>';
 966                 }
 967
 968                 // Reversion link/current indicator
 969                 $row .= '<td>';
 970                 if ( $iscur ) {
 971                         $row .= wfMsgHtml( 'filehist-current' );
 972                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 973                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 974                                 $row .= wfMsgHtml( 'filehist-revert' );
 975                         } else {
 976                                 $row .= $this->skin->link(
 977                                         $this->title,
 978                                         wfMsgHtml( 'filehist-revert' ),
 979                                         array(),
 980                                         array(
 981                                                 'action' => 'revert',
 982                                                 'oldimage' => $img,
 983                                                 'wpEditToken' => $wgUser->editToken( $img )
 984                                         ),
 985                                         array( 'known', 'noclasses' )
 986                                 );
 987                         }
 988                 }
 989                 $row .= '</td>';
 990
 991                 // Date/time and image link
 992                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
 993                         $selected = "class='filehistory-selected'";
 994                 }
 995                 $row .= "<td $selected style='white-space: nowrap;'>";
 996                 if ( !$file->userCan( File::DELETED_FILE ) ) {
 997                         # Don't link to unviewable files
 998                         $row .= '<span class="history-deleted">' . $wgLang->timeAndDate( $timestamp, true ) . '</span>';
 999                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1000                         $this->preventClickjacking();
1001                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1002                         # Make a link to review the image
1003                         $url = $this->skin->link(
1004                                 $revdel,
1005                                 $wgLang->timeAndDate( $timestamp, true ),
1006                                 array(),
1007                                 array(
1008                                         'target' => $this->title->getPrefixedText(),
1009                                         'file' => $img,
1010                                         'token' => $wgUser->editToken( $img )
1011                                 ),
1012                                 array( 'known', 'noclasses' )
1013                         );
1014                         $row .= '<span class="history-deleted">' . $url . '</span>';
1015                 } else {
1016                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1017                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeAndDate( $timestamp, true ) );
1018                 }
1019                 $row .= "</td>";
1020
1021                 // Thumbnail
1022                 if ( $this->showThumb ) {
1023                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1024                 }
1025
1026                 // Image dimensions + size
1027                 $row .= '<td>';
1028                 $row .= htmlspecialchars( $file->getDimensionsString() );
1029                 $row .= " <span style='white-space: nowrap;'>(" . $this->skin->formatSize( $file->getSize() ) . ')</span>';
1030                 $row .= '</td>';
1031
1032                 // Uploading user
1033                 $row .= '<td>';
1034                 if ( $local ) {
1035                         // Hide deleted usernames
1036                         if ( $file->isDeleted( File::DELETED_USER ) ) {
1037                                 $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1038                         } else {
1039                                 $row .= $this->skin->userLink( $user, $usertext ) . " <span style='white-space: nowrap;'>" .
1040                                         $this->skin->userToolLinks( $user, $usertext ) . "</span>";
1041                         }
1042                 } else {
1043                         $row .= htmlspecialchars( $usertext );
1044                 }
1045                 $row .= '</td><td>';
1046
1047                 // Don't show deleted descriptions
1048                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1049                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span>';
1050                 } else {
1051                         $row .= $this->skin->commentBlock( $description, $this->title );
1052                 }
1053                 $row .= '</td>';
1054
1055                 $rowClass = null;
1056                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1057                 $classAttr = $rowClass ? " class='$rowClass'" : "";
1058
1059                 return "<tr{$classAttr}>{$row}</tr>\n";
1060         }
1061
1062         /**
1063          * @param File $file
1064          * @return string
1065          */
1066         protected function getThumbForLine( $file ) {
1067                 global $wgLang;
1068
1069                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1070                         $params = array(
1071                                 'width' => '120',
1072                                 'height' => '120',
1073                         );
1074                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1075
1076                         $thumbnail = $file->transform( $params );
1077                         $options = array(
1078                                 'alt' => wfMsg( 'filehist-thumbtext',
1079                                         $wgLang->timeAndDate( $timestamp, true ),
1080                                         $wgLang->date( $timestamp, true ),
1081                                         $wgLang->time( $timestamp, true ) ),
1082                                 'file-link' => true,
1083                         );
1084
1085                         if ( !$thumbnail ) return wfMsgHtml( 'filehist-nothumb' );
1086
1087                         return $thumbnail->toHtml( $options );
1088                 } else {
1089                         return wfMsgHtml( 'filehist-nothumb' );
1090                 }
1091         }
1092
1093         protected function preventClickjacking( $enable = true ) {
1094                 $this->preventClickjacking = $enable;
1095         }
1096
1097         public function getPreventClickjacking() {
1098                 return $this->preventClickjacking;
1099         }
1100 }
1101
1102 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1103         protected $preventClickjacking = false;
1104
1105         /**
1106          * @var File
1107          */
1108         protected $mImg;
1109
1110         /**
1111          * @var Title
1112          */
1113         protected $mTitle;
1114
1115         /**
1116          * @param ImagePage $imagePage
1117          */
1118         function __construct( $imagePage ) {
1119                 parent::__construct();
1120                 $this->mImagePage = $imagePage;
1121                 $this->mTitle = clone ( $imagePage->getTitle() );
1122                 $this->mTitle->setFragment( '#filehistory' );
1123                 $this->mImg = null;
1124                 $this->mHist = array();
1125                 $this->mRange = array( 0, 0 ); // display range
1126         }
1127
1128         function getTitle() {
1129                 return $this->mTitle;
1130         }
1131
1132         function getQueryInfo() {
1133                 return false;
1134         }
1135
1136         function getIndexField() {
1137                 return '';
1138         }
1139
1140         function formatRow( $row ) {
1141                 return '';
1142         }
1143
1144         function getBody() {
1145                 $s = '';
1146                 $this->doQuery();
1147                 if ( count( $this->mHist ) ) {
1148                         $list = new ImageHistoryList( $this->mImagePage );
1149                         # Generate prev/next links
1150                         $navLink = $this->getNavigationBar();
1151                         $s = $list->beginImageHistoryList( $navLink );
1152                         // Skip rows there just for paging links
1153                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1154                                 $file = $this->mHist[$i];
1155                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1156                         }
1157                         $s .= $list->endImageHistoryList( $navLink );
1158
1159                         if ( $list->getPreventClickjacking() ) {
1160                                 $this->preventClickjacking();
1161                         }
1162                 }
1163                 return $s;
1164         }
1165
1166         function doQuery() {
1167                 if ( $this->mQueryDone ) return;
1168                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1169                 if ( !$this->mImg->exists() ) {
1170                         return;
1171                 }
1172                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1173                 if ( $this->mIsBackwards ) {
1174                         // Fetch the file history
1175                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1176                         // The current rev may not meet the offset/limit
1177                         $numRows = count( $this->mHist );
1178                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1179                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1180                         }
1181                 } else {
1182                         // The current rev may not meet the offset
1183                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1184                                 $this->mHist[] = $this->mImg;
1185                         }
1186                         // Old image versions (fetch extra row for nav links)
1187                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1188                         // Fetch the file history
1189                         $this->mHist = array_merge( $this->mHist,
1190                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1191                 }
1192                 $numRows = count( $this->mHist ); // Total number of query results
1193                 if ( $numRows ) {
1194                         # Index value of top item in the list
1195                         $firstIndex = $this->mIsBackwards ?
1196                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1197                         # Discard the extra result row if there is one
1198                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1199                                 if ( $this->mIsBackwards ) {
1200                                         # Index value of item past the index
1201                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1202                                         # Index value of bottom item in the list
1203                                         $lastIndex = $this->mHist[1]->getTimestamp();
1204                                         # Display range
1205                                         $this->mRange = array( 1, $numRows - 1 );
1206                                 } else {
1207                                         # Index value of item past the index
1208                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1209                                         # Index value of bottom item in the list
1210                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1211                                         # Display range
1212                                         $this->mRange = array( 0, $numRows - 2 );
1213                                 }
1214                         } else {
1215                                 # Setting indexes to an empty string means that they will be
1216                                 # omitted if they would otherwise appear in URLs. It just so
1217                                 # happens that this  is the right thing to do in the standard
1218                                 # UI, in all the relevant cases.
1219                                 $this->mPastTheEndIndex = '';
1220                                 # Index value of bottom item in the list
1221                                 $lastIndex = $this->mIsBackwards ?
1222                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1223                                 # Display range
1224                                 $this->mRange = array( 0, $numRows - 1 );
1225                         }
1226                 } else {
1227                         $firstIndex = '';
1228                         $lastIndex = '';
1229                         $this->mPastTheEndIndex = '';
1230                 }
1231                 if ( $this->mIsBackwards ) {
1232                         $this->mIsFirst = ( $numRows < $queryLimit );
1233                         $this->mIsLast = ( $this->mOffset == '' );
1234                         $this->mLastShown = $firstIndex;
1235                         $this->mFirstShown = $lastIndex;
1236                 } else {
1237                         $this->mIsFirst = ( $this->mOffset == '' );
1238                         $this->mIsLast = ( $numRows < $queryLimit );
1239                         $this->mLastShown = $lastIndex;
1240                         $this->mFirstShown = $firstIndex;
1241                 }
1242                 $this->mQueryDone = true;
1243         }
1244
1245         protected function preventClickjacking( $enable = true ) {
1246                 $this->preventClickjacking = $enable;
1247         }
1248
1249         public function getPreventClickjacking() {
1250                 return $this->preventClickjacking;
1251         }
1252
1253 }