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          */
  44         public function setFile( $file ) {
  45                 $this->mPage->setFile( $file );
  46                 $this->displayImg = $file;
  47                 $this->fileLoaded = true;
  48         }
  49
  50         protected function loadFile() {
  51                 if ( $this->fileLoaded ) {
  52                         return true;
  53                 }
  54                 $this->fileLoaded = true;
  55
  56                 $this->displayImg = $img = false;
  57                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  58                 if ( !$img ) { // not set by hook?
  59                         $img = wfFindFile( $this->getTitle() );
  60                         if ( !$img ) {
  61                                 $img = wfLocalFile( $this->getTitle() );
  62                         }
  63                 }
  64                 $this->mPage->setFile( $img );
  65                 if ( !$this->displayImg ) { // not set by hook?
  66                         $this->displayImg = $img;
  67                 }
  68                 $this->repo = $img->getRepo();
  69         }
  70
  71         /**
  72          * Handler for action=render
  73          * Include body text only; none of the image extras
  74          */
  75         public function render() {
  76                 global $wgOut;
  77                 $wgOut->setArticleBodyOnly( true );
  78                 parent::view();
  79         }
  80
  81         public function view() {
  82                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  83
  84                 $diff = $wgRequest->getVal( 'diff' );
  85                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  86
  87                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  88                         return parent::view();
  89                 }
  90
  91                 $this->loadFile();
  92
  93                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
  94                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || isset( $diff ) ) {
  95                                 // mTitle is the same as the redirect target so ask Article
  96                                 // to perform the redirect for us.
  97                                 $wgRequest->setVal( 'diffonly', 'true' );
  98                                 return parent::view();
  99                         } else {
 100                                 // mTitle is not the same as the redirect target so it is
 101                                 // probably the redirect page itself. Fake the redirect symbol
 102                                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 103                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 104                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 105                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 106                                 return;
 107                         }
 108                 }
 109
 110                 $this->showRedirectedFromHeader();
 111
 112                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 113                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 114                         $formattedMetadata = $this->displayImg->formatMetadata();
 115                         $showmeta = $formattedMetadata !== false;
 116                 } else {
 117                         $showmeta = false;
 118                 }
 119
 120                 if ( !$diff && $this->displayImg->exists() ) {
 121                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 122                 }
 123
 124                 if ( !$diff ) {
 125                         $this->openShowImage();
 126                 }
 127
 128                 # No need to display noarticletext, we use our own message, output in openShowImage()
 129                 if ( $this->mPage->getID() ) {
 130                         # NS_FILE is in the user language, but this section (the actual wikitext)
 131                         # should be in page content language
 132                         $pageLang = $this->getTitle()->getPageLanguage();
 133                         $wgOut->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 134                                 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
 135                                 'class' => 'mw-content-'.$pageLang->getDir() ) ) );
 136                         parent::view();
 137                         $wgOut->addHTML( Xml::closeElement( 'div' ) );
 138                 } else {
 139                         # Just need to set the right headers
 140                         $wgOut->setArticleFlag( true );
 141                         $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 142                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 143                 }
 144
 145                 # Show shared description, if needed
 146                 if ( $this->mExtraDescription ) {
 147                         $fol = wfMessage( 'shareddescriptionfollows' );
 148                         if ( !$fol->isDisabled() ) {
 149                                 $wgOut->addWikiText( $fol->plain() );
 150                         }
 151                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 152                 }
 153
 154                 $this->closeShowImage();
 155                 $this->imageHistory();
 156                 // TODO: Cleanup the following
 157
 158                 $wgOut->addHTML( Xml::element( 'h2',
 159                         array( 'id' => 'filelinks' ),
 160                         wfMsg( 'imagelinks' ) ) . "\n" );
 161                 $this->imageDupes();
 162                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 163                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 164                 $this->imageLinks();
 165
 166                 # Allow extensions to add something after the image links
 167                 $html = '';
 168                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 169                 if ( $html ) {
 170                         $wgOut->addHTML( $html );
 171                 }
 172
 173                 if ( $showmeta ) {
 174                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 175                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 176                         $wgOut->addModules( array( 'mediawiki.action.view.metadata' ) );
 177                 }
 178
 179                 // Add remote Filepage.css
 180                 if( !$this->repo->isLocal() ) {
 181                         $css = $this->repo->getDescriptionStylesheetUrl();
 182                         if ( $css ) {
 183                                 $wgOut->addStyle( $css );
 184                         }
 185                 }
 186                 // always show the local local Filepage.css, bug 29277
 187                 $wgOut->addModuleStyles( 'filepage' );
 188         }
 189
 190         /**
 191          * @return File
 192          */
 193         public function getDisplayedFile() {
 194                 $this->loadFile();
 195                 return $this->displayImg;
 196         }
 197
 198         /**
 199          * Create the TOC
 200          *
 201          * @param $metadata Boolean: whether or not to show the metadata link
 202          * @return String
 203          */
 204         protected function showTOC( $metadata ) {
 205                 $r = array(
 206                         '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 207                         '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 208                         '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 209                 );
 210                 if ( $metadata ) {
 211                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 212                 }
 213
 214                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 215
 216                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 217         }
 218
 219         /**
 220          * Make a table with metadata to be shown in the output page.
 221          *
 222          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 223          *
 224          * @param $metadata Array: the array containing the EXIF data
 225          * @return String The metadata table. This is treated as Wikitext (!)
 226          */
 227         protected function makeMetadataTable( $metadata ) {
 228                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 229                 $r .= wfMsgNoTrans( 'metadata-help' );
 230                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 231                 foreach ( $metadata as $type => $stuff ) {
 232                         foreach ( $stuff as $v ) {
 233                                 # @todo FIXME: Why is this using escapeId for a class?!
 234                                 $class = Sanitizer::escapeId( $v['id'] );
 235                                 if ( $type == 'collapsed' ) {
 236                                         $class .= ' collapsable';
 237                                 }
 238                                 $r .= "<tr class=\"$class\">\n";
 239                                 $r .= "<th>{$v['name']}</th>\n";
 240                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 241                         }
 242                 }
 243                 $r .= "</table>\n</div>\n";
 244                 return $r;
 245         }
 246
 247         /**
 248          * Overloading Article's getContent method.
 249          *
 250          * Omit noarticletext if sharedupload; text will be fetched from the
 251          * shared upload server if possible.
 252          * @return string
 253          */
 254         public function getContent() {
 255                 $this->loadFile();
 256                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 257                         return '';
 258                 }
 259                 return parent::getContent();
 260         }
 261
 262         protected function openShowImage() {
 263                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 264                         $wgLang, $wgEnableUploads, $wgSend404Code;
 265
 266                 $this->loadFile();
 267
 268                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 269                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 270                         $sizeSel = User::getDefaultOption( 'imagesize' );
 271
 272                         // The user offset might still be incorrect, specially if
 273                         // $wgImageLimits got changed (see bug #8858).
 274                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 275                                 // Default to the first offset in $wgImageLimits
 276                                 $sizeSel = 0;
 277                         }
 278                 }
 279                 $max = $wgImageLimits[$sizeSel];
 280                 $maxWidth = $max[0];
 281                 $maxHeight = $max[1];
 282                 $dirmark = $wgLang->getDirMark();
 283
 284                 if ( $this->displayImg->exists() ) {
 285                         # image
 286                         $page = $wgRequest->getIntOrNull( 'page' );
 287                         if ( is_null( $page ) ) {
 288                                 $params = array();
 289                                 $page = 1;
 290                         } else {
 291                                 $params = array( 'page' => $page );
 292                         }
 293                         $width_orig = $this->displayImg->getWidth( $page );
 294                         $width = $width_orig;
 295                         $height_orig = $this->displayImg->getHeight( $page );
 296                         $height = $height_orig;
 297
 298                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 299
 300                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 301
 302                         if ( $this->displayImg->allowInlineDisplay() ) {
 303                                 # image
 304
 305                                 # "Download high res version" link below the image
 306                                 # $msgsize = wfMsgHtml( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime );
 307                                 # We'll show a thumbnail of this image
 308                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 309                                         # Calculate the thumbnail size.
 310                                         # First case, the limiting factor is the width, not the height.
 311                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 312                                                 $height = round( $height * $maxWidth / $width );
 313                                                 $width = $maxWidth;
 314                                                 # Note that $height <= $maxHeight now.
 315                                         } else {
 316                                                 $newwidth = floor( $width * $maxHeight / $height );
 317                                                 $height = round( $height * $newwidth / $width );
 318                                                 $width = $newwidth;
 319                                                 # Note that $height <= $maxHeight now, but might not be identical
 320                                                 # because of rounding.
 321                                         }
 322                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 323                                         $otherSizes = array();
 324                                         foreach ( $wgImageLimits as $size ) {
 325                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig &&
 326                                                                 $size[0] != $width && $size[1] != $height ) {
 327                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 328                                                 }
 329                                         }
 330                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 331                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 332                                                 parse() . ' ' .
 333                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 334                                                         wfMessage( 'show-big-image-other' )->rawParams( $wgLang->pipeList( $otherSizes ) )->
 335                                                         params( count( $otherSizes ) )->parse()
 336                                                 );
 337                                 } elseif ( $width == 0 && $height == 0 ){
 338                                         # Some sort of audio file that doesn't have dimensions
 339                                         # Don't output a no hi res message for such a file
 340                                         $msgsmall = '';
 341                                 } else {
 342                                         # Image is small enough to show full size on image page
 343                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 344                                 }
 345
 346                                 $params['width'] = $width;
 347                                 $params['height'] = $height;
 348                                 $thumbnail = $this->displayImg->transform( $params );
 349
 350                                 $showLink = true;
 351                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 352
 353                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 354                                 if ( $isMulti ) {
 355                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 356                                 }
 357
 358                                 if ( $thumbnail ) {
 359                                         $options = array(
 360                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 361                                                 'file-link' => true,
 362                                         );
 363                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 364                                                 $thumbnail->toHtml( $options ) .
 365                                                 $anchorclose . "</div>\n" );
 366                                 }
 367
 368                                 if ( $isMulti ) {
 369                                         $count = $this->displayImg->pageCount();
 370
 371                                         if ( $page > 1 ) {
 372                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 373                                                 $link = Linker::link(
 374                                                         $this->getTitle(),
 375                                                         $label,
 376                                                         array(),
 377                                                         array( 'page' => $page - 1 ),
 378                                                         array( 'known', 'noclasses' )
 379                                                 );
 380                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 381                                                         array( 'page' => $page - 1 ) );
 382                                         } else {
 383                                                 $thumb1 = '';
 384                                         }
 385
 386                                         if ( $page < $count ) {
 387                                                 $label = wfMsg( 'imgmultipagenext' );
 388                                                 $link = Linker::link(
 389                                                         $this->getTitle(),
 390                                                         $label,
 391                                                         array(),
 392                                                         array( 'page' => $page + 1 ),
 393                                                         array( 'known', 'noclasses' )
 394                                                 );
 395                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 396                                                         array( 'page' => $page + 1 ) );
 397                                         } else {
 398                                                 $thumb2 = '';
 399                                         }
 400
 401                                         global $wgScript;
 402
 403                                         $formParams = array(
 404                                                 'name' => 'pageselector',
 405                                                 'action' => $wgScript,
 406                                                 'onchange' => 'document.pageselector.submit();',
 407                                         );
 408                                         $options = array();
 409                                         for ( $i = 1; $i <= $count; $i++ ) {
 410                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 411                                         }
 412                                         $select = Xml::tags( 'select',
 413                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 414                                                 implode( "\n", $options ) );
 415
 416                                         $wgOut->addHTML(
 417                                                 '</td><td><div class="multipageimagenavbox">' .
 418                                                 Xml::openElement( 'form', $formParams ) .
 419                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 420                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 421                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 422                                                 Xml::closeElement( 'form' ) .
 423                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 424                                         );
 425                                 }
 426                         } else {
 427                                 # if direct link is allowed but it's not a renderable image, show an icon.
 428                                 if ( $this->displayImg->isSafeFile() ) {
 429                                         $icon = $this->displayImg->iconThumb();
 430
 431                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 432                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 433                                                 "</div>\n" );
 434                                 }
 435
 436                                 $showLink = true;
 437                         }
 438
 439                         if ( $showLink ) {
 440                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 441                                 $linktext = $filename;
 442                                 if ( isset( $msgbig ) ) {
 443                                         $linktext = wfEscapeWikiText( $msgbig );
 444                                 }
 445                                 $medialink = "[[Media:$filename|$linktext]]";
 446
 447                                 if ( !$this->displayImg->isSafeFile() ) {
 448                                         $warning = wfMsgNoTrans( 'mediawarning' );
 449                                         $wgOut->addWikiText( <<<EOT
 450 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span>$dirmark <span class="fileInfo">$longDesc</span></div>
 451 <div class="mediaWarning">$warning</div>
 452 EOT
 453                                                 );
 454                                 } else {
 455                                         $wgOut->addWikiText( <<<EOT
 456 <div class="fullMedia">{$medialink}{$dirmark} <span class="fileInfo">$longDesc</span>
 457 </div>
 458 EOT
 459                                         );
 460                                 }
 461                         }
 462
 463                         if ( !$this->displayImg->isLocal() ) {
 464                                 $this->printSharedImageText();
 465                         }
 466                 } else {
 467                         # Image does not exist
 468                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 469                                 // Only show an upload link if the user can upload
 470                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 471                                 $nofile = array(
 472                                         'filepage-nofile-link',
 473                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 474                                 );
 475                         } else {
 476                                 $nofile = 'filepage-nofile';
 477                         }
 478                         // Note, if there is an image description page, but
 479                         // no image, then this setRobotPolicy is overriden
 480                         // by Article::View().
 481                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 482                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 483                         if ( !$this->getID() && $wgSend404Code ) {
 484                                 // If there is no image, no shared image, and no description page,
 485                                 // output a 404, to be consistent with articles.
 486                                 $wgRequest->response()->header( 'HTTP/1.1 404 Not Found' );
 487                         }
 488                 }
 489                 $wgOut->setFileVersion( $this->displayImg );
 490         }
 491
 492         /**
 493          * Creates an thumbnail of specified size and returns an HTML link to it
 494          * @param $params array Scaler parameters
 495          * @param $width int
 496          * @param $height int
 497          * @return string
 498          */
 499         private function makeSizeLink( $params, $width, $height ) {
 500                 $params['width'] = $width;
 501                 $params['height'] = $height;
 502                 $thumbnail = $this->displayImg->transform( $params );
 503                 if ( $thumbnail && !$thumbnail->isError() ) {
 504                         return Html::rawElement( 'a', array(
 505                                 'href' => $thumbnail->getUrl(),
 506                                 'class' => 'mw-thumbnail-link'
 507                                 ), wfMessage( 'show-big-image-size' )->numParams(
 508                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 509                                 )->parse() );
 510                 } else {
 511                         return '';
 512                 }
 513         }
 514
 515         /**
 516          * Show a notice that the file is from a shared repository
 517          */
 518         protected function printSharedImageText() {
 519                 global $wgOut;
 520
 521                 $this->loadFile();
 522
 523                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 524                 $descText = $this->mPage->getFile()->getDescriptionText();
 525
 526                 /* Add canonical to head if there is no local page for this shared file */
 527                 if( $descUrl && $this->mPage->getID() == 0 ) {
 528                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 529                 }
 530
 531                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 532                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 533
 534                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 535                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 536                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 537                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 538                 } else {
 539                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 540                 }
 541
 542                 if ( $descText ) {
 543                         $this->mExtraDescription = $descText;
 544                 }
 545         }
 546
 547         public function getUploadUrl() {
 548                 $this->loadFile();
 549                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 550                 return $uploadTitle->getFullURL( array(
 551                         'wpDestFile' => $this->mPage->getFile()->getName(),
 552                         'wpForReUpload' => 1
 553                  ) );
 554         }
 555
 556         /**
 557          * Print out the various links at the bottom of the image page, e.g. reupload,
 558          * external editing (and instructions link) etc.
 559          */
 560         protected function uploadLinksBox() {
 561                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 562
 563                 if ( !$wgEnableUploads ) {
 564                         return;
 565                 }
 566
 567                 $this->loadFile();
 568                 if ( !$this->mPage->getFile()->isLocal() ) {
 569                         return;
 570                 }
 571
 572                 $wgOut->addHTML( "<br /><ul>\n" );
 573
 574                 # "Upload a new version of this file" link
 575                 if ( UploadBase::userCanReUpload( $wgUser, $this->mPage->getFile()->name ) ) {
 576                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 577                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 578                 }
 579
 580                 # External editing link
 581                 if ( $wgUseExternalEditor ) {
 582                         $elink = Linker::link(
 583                                 $this->getTitle(),
 584                                 wfMsgHtml( 'edit-externally' ),
 585                                 array(),
 586                                 array(
 587                                         'action' => 'edit',
 588                                         'externaledit' => 'true',
 589                                         'mode' => 'file'
 590                                 ),
 591                                 array( 'known', 'noclasses' )
 592                         );
 593                         $wgOut->addHTML(
 594                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 595                                 wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) .
 596                                 "</small></li>\n"
 597                         );
 598                 }
 599
 600                 $wgOut->addHTML( "</ul>\n" );
 601         }
 602
 603         protected function closeShowImage() { } # For overloading
 604
 605         /**
 606          * If the page we've just displayed is in the "Image" namespace,
 607          * we follow it with an upload history of the image and its usage.
 608          */
 609         protected function imageHistory() {
 610                 global $wgOut;
 611
 612                 $this->loadFile();
 613                 $pager = new ImageHistoryPseudoPager( $this );
 614                 $wgOut->addHTML( $pager->getBody() );
 615                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 616
 617                 $this->mPage->getFile()->resetHistory(); // free db resources
 618
 619                 # Exist check because we don't want to show this on pages where an image
 620                 # doesn't exist along with the noimage message, that would suck. -ævar
 621                 if ( $this->mPage->getFile()->exists() ) {
 622                         $this->uploadLinksBox();
 623                 }
 624         }
 625
 626         /**
 627          * @param $target
 628          * @param $limit
 629          * @return ResultWrapper
 630          */
 631         protected function queryImageLinks( $target, $limit ) {
 632                 $dbr = wfGetDB( DB_SLAVE );
 633
 634                 return $dbr->select(
 635                         array( 'imagelinks', 'page' ),
 636                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 637                         array( 'il_to' => $target, 'il_from = page_id' ),
 638                         __METHOD__,
 639                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 640                 );
 641         }
 642
 643         protected function imageLinks() {
 644                 global $wgOut, $wgLang;
 645
 646                 $limit = 100;
 647
 648                 $res = $this->queryImageLinks( $this->getTitle()->getDbKey(), $limit + 1);
 649                 $rows = array();
 650                 $redirects = array();
 651                 foreach ( $res as $row ) {
 652                         if ( $row->page_is_redirect ) {
 653                                 $redirects[$row->page_title] = array();
 654                         }
 655                         $rows[] = $row;
 656                 }
 657                 $count = count( $rows );
 658
 659                 $hasMore = $count > $limit;
 660                 if ( !$hasMore && count( $redirects ) ) {
 661                         $res = $this->queryImageLinks( array_keys( $redirects ),
 662                                 $limit - count( $rows ) + 1 );
 663                         foreach ( $res as $row ) {
 664                                 $redirects[$row->il_to][] = $row;
 665                                 $count++;
 666                         }
 667                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 668                 }
 669
 670                 if ( $count == 0 ) {
 671                         $wgOut->wrapWikiMsg(
 672                                 Html::rawElement( 'div',
 673                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 674                                 'nolinkstoimage'
 675                         );
 676                         return;
 677                 }
 678
 679                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 680                 if ( !$hasMore ) {
 681                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 682                 } else {
 683                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 684                         $wgOut->addWikiMsg( 'linkstoimage-more',
 685                                 $wgLang->formatNum( $limit ),
 686                                 $this->getTitle()->getPrefixedDBkey()
 687                         );
 688                 }
 689
 690                 $wgOut->addHTML(
 691                         Html::openElement( 'ul',
 692                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 693                 );
 694                 $count = 0;
 695
 696                 // Sort the list by namespace:title
 697                 usort( $rows, array( $this, 'compare' ) );
 698
 699                 // Create links for every element
 700                 $currentCount = 0;
 701                 foreach( $rows as $element ) {
 702                         $currentCount++;
 703                         if ( $currentCount > $limit ) {
 704                                 break;
 705                         }
 706
 707                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 708                         if ( !isset( $redirects[$element->page_title] ) ) {
 709                                 $liContents = $link;
 710                         } else {
 711                                 $ul = "<ul class='mw-imagepage-redirectstofile'>\n";
 712                                 foreach ( $redirects[$element->page_title] as $row ) {
 713                                         $currentCount++;
 714                                         if ( $currentCount > $limit ) {
 715                                                 break;
 716                                         }
 717
 718                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 719                                         $ul .= Html::rawElement(
 720                                                 'li',
 721                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 722                                                 $link2
 723                                                 ) . "\n";
 724                                 }
 725                                 $ul .= '</ul>';
 726                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 727                                         $link, $ul )->parse();
 728                         }
 729                         $wgOut->addHTML( Html::rawElement(
 730                                         'li',
 731                                         array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 732                                         $liContents
 733                                 ) . "\n"
 734                         );
 735
 736                 };
 737                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 738                 $res->free();
 739
 740                 // Add a links to [[Special:Whatlinkshere]]
 741                 if ( $count > $limit ) {
 742                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 743                 }
 744                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 745         }
 746
 747         protected function imageDupes() {
 748                 global $wgOut, $wgLang;
 749
 750                 $this->loadFile();
 751
 752                 $dupes = $this->mPage->getDuplicates();
 753                 if ( count( $dupes ) == 0 ) {
 754                         return;
 755                 }
 756
 757                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 758                 $wgOut->addWikiMsg( 'duplicatesoffile',
 759                         $wgLang->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 760                 );
 761                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 762
 763                 /**
 764                  * @var $file File
 765                  */
 766                 foreach ( $dupes as $file ) {
 767                         $fromSrc = '';
 768                         if ( $file->isLocal() ) {
 769                                 $link = Linker::link(
 770                                         $file->getTitle(),
 771                                         null,
 772                                         array(),
 773                                         array(),
 774                                         array( 'known', 'noclasses' )
 775                                 );
 776                         } else {
 777                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 778                                         $file->getTitle()->getPrefixedText() );
 779                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 780                         }
 781                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 782                 }
 783                 $wgOut->addHTML( "</ul></div>\n" );
 784         }
 785
 786         /**
 787          * Delete the file, or an earlier version of it
 788          */
 789         public function delete() {
 790                 $file = $this->mPage->getFile();
 791                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 792                         // Standard article deletion
 793                         parent::delete();
 794                         return;
 795                 }
 796
 797                 $deleter = new FileDeleteForm( $file );
 798                 $deleter->execute();
 799         }
 800
 801         /**
 802          * Display an error with a wikitext description
 803          *
 804          * @param $description String
 805          */
 806         function showError( $description ) {
 807                 global $wgOut;
 808                 $wgOut->setPageTitle( wfMessage( 'internalerror' ) );
 809                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 810                 $wgOut->setArticleRelated( false );
 811                 $wgOut->enableClientCache( false );
 812                 $wgOut->addWikiText( $description );
 813         }
 814
 815         /**
 816          * Callback for usort() to do link sorts by (namespace, title)
 817          * Function copied from Title::compare()
 818          *
 819          * @param $a object page to compare with
 820          * @param $b object page to compare with
 821          * @return Integer: result of string comparison, or namespace comparison
 822          */
 823         protected function compare( $a, $b ) {
 824                 if ( $a->page_namespace == $b->page_namespace ) {
 825                         return strcmp( $a->page_title, $b->page_title );
 826                 } else {
 827                         return $a->page_namespace - $b->page_namespace;
 828                 }
 829         }
 830 }
 831
 832 /**
 833  * Builds the image revision log shown on image pages
 834  *
 835  * @ingroup Media
 836  */
 837 class ImageHistoryList {
 838
 839         /**
 840          * @var Title
 841          */
 842         protected $title;
 843
 844         /**
 845          * @var File
 846          */
 847         protected $img;
 848
 849         /**
 850          * @var ImagePage
 851          */
 852         protected $imagePage;
 853
 854         /**
 855          * @var File
 856          */
 857         protected $current;
 858
 859         protected $repo, $showThumb;
 860         protected $preventClickjacking = false;
 861
 862         /**
 863          * @param ImagePage $imagePage
 864          */
 865         public function __construct( $imagePage ) {
 866                 global $wgShowArchiveThumbnails;
 867                 $this->current = $imagePage->getFile();
 868                 $this->img = $imagePage->getDisplayedFile();
 869                 $this->title = $imagePage->getTitle();
 870                 $this->imagePage = $imagePage;
 871                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 872         }
 873
 874         /**
 875          * @return ImagePage
 876          */
 877         public function getImagePage() {
 878                 return $this->imagePage;
 879         }
 880
 881         /**
 882          * @return File
 883          */
 884         public function getFile() {
 885                 return $this->img;
 886         }
 887
 888         /**
 889          * @param $navLinks string
 890          * @return string
 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->isAllowedAny( 'delete', '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         /**
 910          * @param $navLinks string
 911          * @return string
 912          */
 913         public function endImageHistoryList( $navLinks = '' ) {
 914                 return "</table>\n$navLinks\n</div>\n";
 915         }
 916
 917         /**
 918          * @param $iscur
 919          * @param $file File
 920          * @return string
 921          */
 922         public function imageHistoryLine( $iscur, $file ) {
 923                 global $wgUser, $wgLang, $wgContLang;
 924
 925                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 926                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 927                 $user = $file->getUser( 'id' );
 928                 $usertext = $file->getUser( 'text' );
 929                 $description = $file->getDescription();
 930
 931                 $local = $this->current->isLocal();
 932                 $row = $selected = '';
 933
 934                 // Deletion link
 935                 if ( $local && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
 936                         $row .= '<td>';
 937                         # Link to remove from history
 938                         if ( $wgUser->isAllowed( 'delete' ) ) {
 939                                 $q = array( 'action' => 'delete' );
 940                                 if ( !$iscur ) {
 941                                         $q['oldimage'] = $img;
 942                                 }
 943                                 $row .= Linker::link(
 944                                         $this->title,
 945                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 946                                         array(), $q, array( 'known' )
 947                                 );
 948                         }
 949                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 950                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 951                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 952                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 953                                         $row .= '<br />';
 954                                 }
 955                                 // If file is top revision or locked from this user, don't link
 956                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 957                                         $del = Linker::revDeleteLinkDisabled( $canHide );
 958                                 } else {
 959                                         list( $ts, $name ) = explode( '!', $img, 2 );
 960                                         $query = array(
 961                                                 'type'   => 'oldimage',
 962                                                 'target' => $this->title->getPrefixedText(),
 963                                                 'ids'    => $ts,
 964                                         );
 965                                         $del = Linker::revDeleteLink( $query,
 966                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 967                                 }
 968                                 $row .= $del;
 969                         }
 970                         $row .= '</td>';
 971                 }
 972
 973                 // Reversion link/current indicator
 974                 $row .= '<td>';
 975                 if ( $iscur ) {
 976                         $row .= wfMsgHtml( 'filehist-current' );
 977                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
 978                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
 979                                 $row .= wfMsgHtml( 'filehist-revert' );
 980                         } else {
 981                                 $row .= Linker::link(
 982                                         $this->title,
 983                                         wfMsgHtml( 'filehist-revert' ),
 984                                         array(),
 985                                         array(
 986                                                 'action' => 'revert',
 987                                                 'oldimage' => $img,
 988                                                 'wpEditToken' => $wgUser->getEditToken( $img )
 989                                         ),
 990                                         array( 'known', 'noclasses' )
 991                                 );
 992                         }
 993                 }
 994                 $row .= '</td>';
 995
 996                 // Date/time and image link
 997                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
 998                         $selected = "class='filehistory-selected'";
 999                 }
1000                 $row .= "<td $selected style='white-space: nowrap;'>";
1001                 if ( !$file->userCan( File::DELETED_FILE ) ) {
1002                         # Don't link to unviewable files
1003                         $row .= '<span class="history-deleted">' . $wgLang->timeanddate( $timestamp, true ) . '</span>';
1004                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1005                         if ( $local ) {
1006                                 $this->preventClickjacking();
1007                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1008                                 # Make a link to review the image
1009                                 $url = Linker::link(
1010                                         $revdel,
1011                                         $wgLang->timeanddate( $timestamp, true ),
1012                                         array(),
1013                                         array(
1014                                                 'target' => $this->title->getPrefixedText(),
1015                                                 'file' => $img,
1016                                                 'token' => $wgUser->getEditToken( $img )
1017                                         ),
1018                                         array( 'known', 'noclasses' )
1019                                 );
1020                         } else {
1021                                 $url = $wgLang->timeanddate( $timestamp, true );
1022                         }
1023                         $row .= '<span class="history-deleted">' . $url . '</span>';
1024                 } else {
1025                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1026                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeanddate( $timestamp, true ) );
1027                 }
1028                 $row .= "</td>";
1029
1030                 // Thumbnail
1031                 if ( $this->showThumb ) {
1032                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1033                 }
1034
1035                 // Image dimensions + size
1036                 $row .= '<td>';
1037                 $row .= htmlspecialchars( $file->getDimensionsString() );
1038                 $row .= ' <span style="white-space: nowrap;">(' . Linker::formatSize( $file->getSize() ) . ')</span>';
1039                 $row .= '</td>';
1040
1041                 // Uploading user
1042                 $row .= '<td>';
1043                 // Hide deleted usernames
1044                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1045                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1046                 } else {
1047                         if ( $local ) {
1048                                 $row .= Linker::userLink( $user, $usertext ) . ' <span style="white-space: nowrap;">' .
1049                                 Linker::userToolLinks( $user, $usertext ) . '</span>';
1050                         } else {
1051                                 $row .= htmlspecialchars( $usertext );
1052                         }
1053                 }
1054                 $row .= '</td>';
1055
1056                 // Don't show deleted descriptions
1057                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1058                         $row .= '<td><span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></td>';
1059                 } else {
1060                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1061                 }
1062
1063                 $rowClass = null;
1064                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1065                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1066
1067                 return "<tr{$classAttr}>{$row}</tr>\n";
1068         }
1069
1070         /**
1071          * @param $file File
1072          * @return string
1073          */
1074         protected function getThumbForLine( $file ) {
1075                 global $wgLang;
1076
1077                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1078                         $params = array(
1079                                 'width' => '120',
1080                                 'height' => '120',
1081                         );
1082                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1083
1084                         $thumbnail = $file->transform( $params );
1085                         $options = array(
1086                                 'alt' => wfMsg( 'filehist-thumbtext',
1087                                         $wgLang->timeanddate( $timestamp, true ),
1088                                         $wgLang->date( $timestamp, true ),
1089                                         $wgLang->time( $timestamp, true ) ),
1090                                 'file-link' => true,
1091                         );
1092
1093                         if ( !$thumbnail ) {
1094                                 return wfMsgHtml( 'filehist-nothumb' );
1095                         }
1096
1097                         return $thumbnail->toHtml( $options );
1098                 } else {
1099                         return wfMsgHtml( 'filehist-nothumb' );
1100                 }
1101         }
1102
1103         /**
1104          * @param $enable bool
1105          */
1106         protected function preventClickjacking( $enable = true ) {
1107                 $this->preventClickjacking = $enable;
1108         }
1109
1110         /**
1111          * @return bool
1112          */
1113         public function getPreventClickjacking() {
1114                 return $this->preventClickjacking;
1115         }
1116 }
1117
1118 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1119         protected $preventClickjacking = false;
1120
1121         /**
1122          * @var File
1123          */
1124         protected $mImg;
1125
1126         /**
1127          * @var Title
1128          */
1129         protected $mTitle;
1130
1131         /**
1132          * @param ImagePage $imagePage
1133          */
1134         function __construct( $imagePage ) {
1135                 parent::__construct();
1136                 $this->mImagePage = $imagePage;
1137                 $this->mTitle = clone ( $imagePage->getTitle() );
1138                 $this->mTitle->setFragment( '#filehistory' );
1139                 $this->mImg = null;
1140                 $this->mHist = array();
1141                 $this->mRange = array( 0, 0 ); // display range
1142         }
1143
1144         /**
1145          * @return Title
1146          */
1147         function getTitle() {
1148                 return $this->mTitle;
1149         }
1150
1151         function getQueryInfo() {
1152                 return false;
1153         }
1154
1155         /**
1156          * @return string
1157          */
1158         function getIndexField() {
1159                 return '';
1160         }
1161
1162         /**
1163          * @return string
1164          */
1165         function formatRow( $row ) {
1166                 return '';
1167         }
1168
1169         /**
1170          * @return string
1171          */
1172         function getBody() {
1173                 $s = '';
1174                 $this->doQuery();
1175                 if ( count( $this->mHist ) ) {
1176                         $list = new ImageHistoryList( $this->mImagePage );
1177                         # Generate prev/next links
1178                         $navLink = $this->getNavigationBar();
1179                         $s = $list->beginImageHistoryList( $navLink );
1180                         // Skip rows there just for paging links
1181                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1182                                 $file = $this->mHist[$i];
1183                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1184                         }
1185                         $s .= $list->endImageHistoryList( $navLink );
1186
1187                         if ( $list->getPreventClickjacking() ) {
1188                                 $this->preventClickjacking();
1189                         }
1190                 }
1191                 return $s;
1192         }
1193
1194         function doQuery() {
1195                 if ( $this->mQueryDone ) {
1196                         return;
1197                 }
1198                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1199                 if ( !$this->mImg->exists() ) {
1200                         return;
1201                 }
1202                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1203                 if ( $this->mIsBackwards ) {
1204                         // Fetch the file history
1205                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1206                         // The current rev may not meet the offset/limit
1207                         $numRows = count( $this->mHist );
1208                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1209                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1210                         }
1211                 } else {
1212                         // The current rev may not meet the offset
1213                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1214                                 $this->mHist[] = $this->mImg;
1215                         }
1216                         // Old image versions (fetch extra row for nav links)
1217                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1218                         // Fetch the file history
1219                         $this->mHist = array_merge( $this->mHist,
1220                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1221                 }
1222                 $numRows = count( $this->mHist ); // Total number of query results
1223                 if ( $numRows ) {
1224                         # Index value of top item in the list
1225                         $firstIndex = $this->mIsBackwards ?
1226                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1227                         # Discard the extra result row if there is one
1228                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1229                                 if ( $this->mIsBackwards ) {
1230                                         # Index value of item past the index
1231                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1232                                         # Index value of bottom item in the list
1233                                         $lastIndex = $this->mHist[1]->getTimestamp();
1234                                         # Display range
1235                                         $this->mRange = array( 1, $numRows - 1 );
1236                                 } else {
1237                                         # Index value of item past the index
1238                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1239                                         # Index value of bottom item in the list
1240                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1241                                         # Display range
1242                                         $this->mRange = array( 0, $numRows - 2 );
1243                                 }
1244                         } else {
1245                                 # Setting indexes to an empty string means that they will be
1246                                 # omitted if they would otherwise appear in URLs. It just so
1247                                 # happens that this  is the right thing to do in the standard
1248                                 # UI, in all the relevant cases.
1249                                 $this->mPastTheEndIndex = '';
1250                                 # Index value of bottom item in the list
1251                                 $lastIndex = $this->mIsBackwards ?
1252                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1253                                 # Display range
1254                                 $this->mRange = array( 0, $numRows - 1 );
1255                         }
1256                 } else {
1257                         $firstIndex = '';
1258                         $lastIndex = '';
1259                         $this->mPastTheEndIndex = '';
1260                 }
1261                 if ( $this->mIsBackwards ) {
1262                         $this->mIsFirst = ( $numRows < $queryLimit );
1263                         $this->mIsLast = ( $this->mOffset == '' );
1264                         $this->mLastShown = $firstIndex;
1265                         $this->mFirstShown = $lastIndex;
1266                 } else {
1267                         $this->mIsFirst = ( $this->mOffset == '' );
1268                         $this->mIsLast = ( $numRows < $queryLimit );
1269                         $this->mLastShown = $lastIndex;
1270                         $this->mFirstShown = $firstIndex;
1271                 }
1272                 $this->mQueryDone = true;
1273         }
1274
1275         /**
1276          * @param $enable bool
1277          */
1278         protected function preventClickjacking( $enable = true ) {
1279                 $this->preventClickjacking = $enable;
1280         }
1281
1282         /**
1283          * @return bool
1284          */
1285         public function getPreventClickjacking() {
1286                 return $this->preventClickjacking;
1287         }
1288
1289 }