includes/ImagePage.php

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