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          * @returnImagePage|null
  34          */
  35         public static function newFromID( $id ) {
  36                 $t = Title::newFromID( $id );
  37                 # @todo FIXME: Doesn't inherit right
  38                 return $t == null ? null : new self( $t );
  39                 # return $t == null ? null : new static( $t ); // PHP 5.3
  40         }
  41
  42         /**
  43          * @param $file File:
  44          * @return void
  45          */
  46         public function setFile( $file ) {
  47                 $this->mPage->setFile( $file );
  48                 $this->displayImg = $file;
  49                 $this->fileLoaded = true;
  50         }
  51
  52         protected function loadFile() {
  53                 if ( $this->fileLoaded ) {
  54                         return true;
  55                 }
  56                 $this->fileLoaded = true;
  57
  58                 $this->displayImg = $img = false;
  59                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  60                 if ( !$img ) { // not set by hook?
  61                         $img = wfFindFile( $this->getTitle() );
  62                         if ( !$img ) {
  63                                 $img = wfLocalFile( $this->getTitle() );
  64                         }
  65                 }
  66                 $this->mPage->setFile( $img );
  67                 if ( !$this->displayImg ) { // not set by hook?
  68                         $this->displayImg = $img;
  69                 }
  70                 $this->repo = $img->getRepo();
  71         }
  72
  73         /**
  74          * Handler for action=render
  75          * Include body text only; none of the image extras
  76          */
  77         public function render() {
  78                 global $wgOut;
  79                 $wgOut->setArticleBodyOnly( true );
  80                 parent::view();
  81         }
  82
  83         public function view() {
  84                 global $wgOut, $wgShowEXIF, $wgRequest, $wgUser;
  85
  86                 $diff = $wgRequest->getVal( 'diff' );
  87                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
  88
  89                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
  90                         parent::view();
  91                         return;
  92                 }
  93
  94                 $this->loadFile();
  95
  96                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
  97                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || isset( $diff ) ) {
  98                                 // mTitle is the same as the redirect target so ask Article
  99                                 // to perform the redirect for us.
 100                                 $wgRequest->setVal( 'diffonly', 'true' );
 101                                 parent::view();
 102                                 return;
 103                         } else {
 104                                 // mTitle is not the same as the redirect target so it is
 105                                 // probably the redirect page itself. Fake the redirect symbol
 106                                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 107                                 $wgOut->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 108                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 109                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 110                                 return;
 111                         }
 112                 }
 113
 114                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 115                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 116                         $formattedMetadata = $this->displayImg->formatMetadata();
 117                         $showmeta = $formattedMetadata !== false;
 118                 } else {
 119                         $showmeta = false;
 120                 }
 121
 122                 if ( !$diff && $this->displayImg->exists() ) {
 123                         $wgOut->addHTML( $this->showTOC( $showmeta ) );
 124                 }
 125
 126                 if ( !$diff ) {
 127                         $this->openShowImage();
 128                 }
 129
 130                 # No need to display noarticletext, we use our own message, output in openShowImage()
 131                 if ( $this->mPage->getID() ) {
 132                         # NS_FILE is in the user language, but this section (the actual wikitext)
 133                         # should be in page content language
 134                         $pageLang = $this->getTitle()->getPageLanguage();
 135                         $wgOut->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 136                                 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
 137                                 'class' => 'mw-content-'.$pageLang->getDir() ) ) );
 138
 139             parent::view(); #FIXME: use ContentHandler::makeArticle() !!
 140
 141                         $wgOut->addHTML( Xml::closeElement( 'div' ) );
 142                 } else {
 143                         # Just need to set the right headers
 144                         $wgOut->setArticleFlag( true );
 145                         $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 146                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 147                 }
 148
 149                 # Show shared description, if needed
 150                 if ( $this->mExtraDescription ) {
 151                         $fol = wfMessage( 'shareddescriptionfollows' );
 152                         if ( !$fol->isDisabled() ) {
 153                                 $wgOut->addWikiText( $fol->plain() );
 154                         }
 155                         $wgOut->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 156                 }
 157
 158                 $this->closeShowImage();
 159                 $this->imageHistory();
 160                 // TODO: Cleanup the following
 161
 162                 $wgOut->addHTML( Xml::element( 'h2',
 163                         array( 'id' => 'filelinks' ),
 164                         wfMsg( 'imagelinks' ) ) . "\n" );
 165                 $this->imageDupes();
 166                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 167                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 168                 $this->imageLinks();
 169
 170                 # Allow extensions to add something after the image links
 171                 $html = '';
 172                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 173                 if ( $html ) {
 174                         $wgOut->addHTML( $html );
 175                 }
 176
 177                 if ( $showmeta ) {
 178                         $wgOut->addHTML( Xml::element( 'h2', array( 'id' => 'metadata' ), wfMsg( 'metadata' ) ) . "\n" );
 179                         $wgOut->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 180                         $wgOut->addModules( array( 'mediawiki.action.view.metadata' ) );
 181                 }
 182
 183                 // Add remote Filepage.css
 184                 if( !$this->repo->isLocal() ) {
 185                         $css = $this->repo->getDescriptionStylesheetUrl();
 186                         if ( $css ) {
 187                                 $wgOut->addStyle( $css );
 188                         }
 189                 }
 190                 // always show the local local Filepage.css, bug 29277
 191                 $wgOut->addModuleStyles( 'filepage' );
 192         }
 193
 194         /**
 195          * @return File
 196          */
 197         public function getDisplayedFile() {
 198                 $this->loadFile();
 199                 return $this->displayImg;
 200         }
 201
 202         /**
 203          * Create the TOC
 204          *
 205          * @param $metadata Boolean: whether or not to show the metadata link
 206          * @return String
 207          */
 208         protected function showTOC( $metadata ) {
 209                 $r = array(
 210                         '<li><a href="#file">' . wfMsgHtml( 'file-anchor-link' ) . '</a></li>',
 211                         '<li><a href="#filehistory">' . wfMsgHtml( 'filehist' ) . '</a></li>',
 212                         '<li><a href="#filelinks">' . wfMsgHtml( 'imagelinks' ) . '</a></li>',
 213                 );
 214                 if ( $metadata ) {
 215                         $r[] = '<li><a href="#metadata">' . wfMsgHtml( 'metadata' ) . '</a></li>';
 216                 }
 217
 218                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 219
 220                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 221         }
 222
 223         /**
 224          * Make a table with metadata to be shown in the output page.
 225          *
 226          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 227          *
 228          * @param $metadata Array: the array containing the EXIF data
 229          * @return String The metadata table. This is treated as Wikitext (!)
 230          */
 231         protected function makeMetadataTable( $metadata ) {
 232                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 233                 $r .= wfMsgNoTrans( 'metadata-help' );
 234                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 235                 foreach ( $metadata as $type => $stuff ) {
 236                         foreach ( $stuff as $v ) {
 237                                 # @todo FIXME: Why is this using escapeId for a class?!
 238                                 $class = Sanitizer::escapeId( $v['id'] );
 239                                 if ( $type == 'collapsed' ) {
 240                                         $class .= ' collapsable';
 241                                 }
 242                                 $r .= "<tr class=\"$class\">\n";
 243                                 $r .= "<th>{$v['name']}</th>\n";
 244                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 245                         }
 246                 }
 247                 $r .= "</table>\n</div>\n";
 248                 return $r;
 249         }
 250
 251     /**
 252      * Overloading Article's getContentObject method.
 253      *
 254      * Omit noarticletext if sharedupload; text will be fetched from the
 255      * shared upload server if possible.
 256      * @return string
 257      */
 258     public function getContentObject() {
 259         $this->loadFile();
 260         if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 261             return null;
 262         }
 263         return parent::getContentObject();
 264     }
 265
 266         protected function openShowImage() {
 267                 global $wgOut, $wgUser, $wgImageLimits, $wgRequest,
 268                         $wgLang, $wgEnableUploads, $wgSend404Code;
 269
 270                 $this->loadFile();
 271
 272                 $sizeSel = intval( $wgUser->getOption( 'imagesize' ) );
 273                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 274                         $sizeSel = User::getDefaultOption( 'imagesize' );
 275
 276                         // The user offset might still be incorrect, specially if
 277                         // $wgImageLimits got changed (see bug #8858).
 278                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 279                                 // Default to the first offset in $wgImageLimits
 280                                 $sizeSel = 0;
 281                         }
 282                 }
 283                 $max = $wgImageLimits[$sizeSel];
 284                 $maxWidth = $max[0];
 285                 $maxHeight = $max[1];
 286                 $dirmark = $wgLang->getDirMarkEntity();
 287
 288                 if ( $this->displayImg->exists() ) {
 289                         # image
 290                         $page = $wgRequest->getIntOrNull( 'page' );
 291                         if ( is_null( $page ) ) {
 292                                 $params = array();
 293                                 $page = 1;
 294                         } else {
 295                                 $params = array( 'page' => $page );
 296                         }
 297                         $width_orig = $this->displayImg->getWidth( $page );
 298                         $width = $width_orig;
 299                         $height_orig = $this->displayImg->getHeight( $page );
 300                         $height = $height_orig;
 301
 302                         $longDesc = wfMsg( 'parentheses', $this->displayImg->getLongDesc() );
 303
 304                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$wgOut ) );
 305
 306                         if ( $this->displayImg->allowInlineDisplay() ) {
 307                                 # image
 308
 309                                 # "Download high res version" link below the image
 310                                 # $msgsize = wfMsgHtml( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime );
 311                                 # We'll show a thumbnail of this image
 312                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 313                                         # Calculate the thumbnail size.
 314                                         # First case, the limiting factor is the width, not the height.
 315                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 316                                                 $height = round( $height * $maxWidth / $width );
 317                                                 $width = $maxWidth;
 318                                                 # Note that $height <= $maxHeight now.
 319                                         } else {
 320                                                 $newwidth = floor( $width * $maxHeight / $height );
 321                                                 $height = round( $height * $newwidth / $width );
 322                                                 $width = $newwidth;
 323                                                 # Note that $height <= $maxHeight now, but might not be identical
 324                                                 # because of rounding.
 325                                         }
 326                                         $msgbig  = wfMsgHtml( 'show-big-image' );
 327                                         $otherSizes = array();
 328                                         foreach ( $wgImageLimits as $size ) {
 329                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig &&
 330                                                                 $size[0] != $width && $size[1] != $height ) {
 331                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 332                                                 }
 333                                         }
 334                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 335                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 336                                                 parse();
 337                                         if ( count( $otherSizes ) && $this->displayImg->getRepo()->canTransformVia404() ) {
 338                                                 $msgsmall .= ' ' .
 339                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 340                                                         wfMessage( 'show-big-image-other' )->rawParams( $wgLang->pipeList( $otherSizes ) )->
 341                                                         params( count( $otherSizes ) )->parse()
 342                                                 );
 343                                         }
 344                                 } elseif ( $width == 0 && $height == 0 ){
 345                                         # Some sort of audio file that doesn't have dimensions
 346                                         # Don't output a no hi res message for such a file
 347                                         $msgsmall = '';
 348                                 } else {
 349                                         # Image is small enough to show full size on image page
 350                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 351                                 }
 352
 353                                 $params['width'] = $width;
 354                                 $params['height'] = $height;
 355                                 $thumbnail = $this->displayImg->transform( $params );
 356
 357                                 $showLink = true;
 358                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 359
 360                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 361                                 if ( $isMulti ) {
 362                                         $wgOut->addHTML( '<table class="multipageimage"><tr><td>' );
 363                                 }
 364
 365                                 if ( $thumbnail ) {
 366                                         $options = array(
 367                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 368                                                 'file-link' => true,
 369                                         );
 370                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 371                                                 $thumbnail->toHtml( $options ) .
 372                                                 $anchorclose . "</div>\n" );
 373                                 }
 374
 375                                 if ( $isMulti ) {
 376                                         $count = $this->displayImg->pageCount();
 377
 378                                         if ( $page > 1 ) {
 379                                                 $label = $wgOut->parse( wfMsg( 'imgmultipageprev' ), false );
 380                                                 $link = Linker::link(
 381                                                         $this->getTitle(),
 382                                                         $label,
 383                                                         array(),
 384                                                         array( 'page' => $page - 1 ),
 385                                                         array( 'known', 'noclasses' )
 386                                                 );
 387                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 388                                                         array( 'page' => $page - 1 ) );
 389                                         } else {
 390                                                 $thumb1 = '';
 391                                         }
 392
 393                                         if ( $page < $count ) {
 394                                                 $label = wfMsg( 'imgmultipagenext' );
 395                                                 $link = Linker::link(
 396                                                         $this->getTitle(),
 397                                                         $label,
 398                                                         array(),
 399                                                         array( 'page' => $page + 1 ),
 400                                                         array( 'known', 'noclasses' )
 401                                                 );
 402                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 403                                                         array( 'page' => $page + 1 ) );
 404                                         } else {
 405                                                 $thumb2 = '';
 406                                         }
 407
 408                                         global $wgScript;
 409
 410                                         $formParams = array(
 411                                                 'name' => 'pageselector',
 412                                                 'action' => $wgScript,
 413                                                 'onchange' => 'document.pageselector.submit();',
 414                                         );
 415                                         $options = array();
 416                                         for ( $i = 1; $i <= $count; $i++ ) {
 417                                                 $options[] = Xml::option( $wgLang->formatNum( $i ), $i, $i == $page );
 418                                         }
 419                                         $select = Xml::tags( 'select',
 420                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 421                                                 implode( "\n", $options ) );
 422
 423                                         $wgOut->addHTML(
 424                                                 '</td><td><div class="multipageimagenavbox">' .
 425                                                 Xml::openElement( 'form', $formParams ) .
 426                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 427                                                 wfMsgExt( 'imgmultigoto', array( 'parseinline', 'replaceafter' ), $select ) .
 428                                                 Xml::submitButton( wfMsg( 'imgmultigo' ) ) .
 429                                                 Xml::closeElement( 'form' ) .
 430                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 431                                         );
 432                                 }
 433                         } else {
 434                                 # if direct link is allowed but it's not a renderable image, show an icon.
 435                                 if ( $this->displayImg->isSafeFile() ) {
 436                                         $icon = $this->displayImg->iconThumb();
 437
 438                                         $wgOut->addHTML( '<div class="fullImageLink" id="file">' .
 439                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 440                                                 "</div>\n" );
 441                                 }
 442
 443                                 $showLink = true;
 444                         }
 445
 446                         if ( $showLink ) {
 447                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 448                                 $linktext = $filename;
 449                                 if ( isset( $msgbig ) ) {
 450                                         $linktext = wfEscapeWikiText( $msgbig );
 451                                 }
 452                                 $medialink = "[[Media:$filename|$linktext]]";
 453
 454                                 if ( !$this->displayImg->isSafeFile() ) {
 455                                         $warning = wfMsgNoTrans( 'mediawarning' );
 456                                         // dirmark is needed here to separate the file name, which
 457                                         // most likely ends in Latin characters, from the description,
 458                                         // which may begin with the file type. In RTL environment
 459                                         // this will get messy.
 460                                         // The dirmark, however, must not be immediately adjacent
 461                                         // to the filename, because it can get copied with it.
 462                                         // See bug 25277.
 463                                         $wgOut->addWikiText( <<<EOT
 464 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 465 <div class="mediaWarning">$warning</div>
 466 EOT
 467                                                 );
 468                                 } else {
 469                                         $wgOut->addWikiText( <<<EOT
 470 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 471 </div>
 472 EOT
 473                                         );
 474                                 }
 475                         }
 476
 477                         if ( !$this->displayImg->isLocal() ) {
 478                                 $this->printSharedImageText();
 479                         }
 480                 } else {
 481                         # Image does not exist
 482                         if ( !$this->getID() ) {
 483                                 # No article exists either
 484                                 # Show deletion log to be consistent with normal articles
 485                                 LogEventsList::showLogExtract(
 486                                         $wgOut,
 487                                         array( 'delete', 'move' ),
 488                                         $this->getTitle()->getPrefixedText(),
 489                                         '',
 490                                         array(  'lim' => 10,
 491                                                 'conds' => array( "log_action != 'revision'" ),
 492                                                 'showIfEmpty' => false,
 493                                                 'msgKey' => array( 'moveddeleted-notice' )
 494                                         )
 495                                 );
 496                         }
 497
 498                         if ( $wgEnableUploads && $wgUser->isAllowed( 'upload' ) ) {
 499                                 // Only show an upload link if the user can upload
 500                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 501                                 $nofile = array(
 502                                         'filepage-nofile-link',
 503                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 504                                 );
 505                         } else {
 506                                 $nofile = 'filepage-nofile';
 507                         }
 508                         // Note, if there is an image description page, but
 509                         // no image, then this setRobotPolicy is overriden
 510                         // by Article::View().
 511                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 512                         $wgOut->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 513                         if ( !$this->getID() && $wgSend404Code ) {
 514                                 // If there is no image, no shared image, and no description page,
 515                                 // output a 404, to be consistent with articles.
 516                                 $wgRequest->response()->header( 'HTTP/1.1 404 Not Found' );
 517                         }
 518                 }
 519                 $wgOut->setFileVersion( $this->displayImg );
 520         }
 521
 522         /**
 523          * Creates an thumbnail of specified size and returns an HTML link to it
 524          * @param $params array Scaler parameters
 525          * @param $width int
 526          * @param $height int
 527          * @return string
 528          */
 529         private function makeSizeLink( $params, $width, $height ) {
 530                 $params['width'] = $width;
 531                 $params['height'] = $height;
 532                 $thumbnail = $this->displayImg->transform( $params );
 533                 if ( $thumbnail && !$thumbnail->isError() ) {
 534                         return Html::rawElement( 'a', array(
 535                                 'href' => $thumbnail->getUrl(),
 536                                 'class' => 'mw-thumbnail-link'
 537                                 ), wfMessage( 'show-big-image-size' )->numParams(
 538                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 539                                 )->parse() );
 540                 } else {
 541                         return '';
 542                 }
 543         }
 544
 545         /**
 546          * Show a notice that the file is from a shared repository
 547          */
 548         protected function printSharedImageText() {
 549                 global $wgOut;
 550
 551                 $this->loadFile();
 552
 553                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 554                 $descText = $this->mPage->getFile()->getDescriptionText();
 555
 556                 /* Add canonical to head if there is no local page for this shared file */
 557                 if( $descUrl && $this->mPage->getID() == 0 ) {
 558                         $wgOut->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 559                 }
 560
 561                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 562                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 563
 564                 if ( $descUrl && $descText && wfMsgNoTrans( 'sharedupload-desc-here' ) !== '-'  ) {
 565                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 566                 } elseif ( $descUrl && wfMsgNoTrans( 'sharedupload-desc-there' ) !== '-' ) {
 567                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 568                 } else {
 569                         $wgOut->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 570                 }
 571
 572                 if ( $descText ) {
 573                         $this->mExtraDescription = $descText;
 574                 }
 575         }
 576
 577         public function getUploadUrl() {
 578                 $this->loadFile();
 579                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 580                 return $uploadTitle->getFullURL( array(
 581                         'wpDestFile' => $this->mPage->getFile()->getName(),
 582                         'wpForReUpload' => 1
 583                  ) );
 584         }
 585
 586         /**
 587          * Print out the various links at the bottom of the image page, e.g. reupload,
 588          * external editing (and instructions link) etc.
 589          */
 590         protected function uploadLinksBox() {
 591                 global $wgUser, $wgOut, $wgEnableUploads, $wgUseExternalEditor;
 592
 593                 if ( !$wgEnableUploads ) {
 594                         return;
 595                 }
 596
 597                 $this->loadFile();
 598                 if ( !$this->mPage->getFile()->isLocal() ) {
 599                         return;
 600                 }
 601
 602                 $wgOut->addHTML( "<br /><ul>\n" );
 603
 604                 # "Upload a new version of this file" link
 605                 if ( UploadBase::userCanReUpload( $wgUser, $this->mPage->getFile()->name ) ) {
 606                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMsg( 'uploadnewversion-linktext' ) );
 607                         $wgOut->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 608                 }
 609
 610                 # External editing link
 611                 if ( $wgUseExternalEditor ) {
 612                         $elink = Linker::link(
 613                                 $this->getTitle(),
 614                                 wfMsgHtml( 'edit-externally' ),
 615                                 array(),
 616                                 array(
 617                                         'action' => 'edit',
 618                                         'externaledit' => 'true',
 619                                         'mode' => 'file'
 620                                 ),
 621                                 array( 'known', 'noclasses' )
 622                         );
 623                         $wgOut->addHTML(
 624                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 625                                 wfMsgExt( 'edit-externally-help', array( 'parseinline' ) ) .
 626                                 "</small></li>\n"
 627                         );
 628                 }
 629
 630                 $wgOut->addHTML( "</ul>\n" );
 631         }
 632
 633         protected function closeShowImage() { } # For overloading
 634
 635         /**
 636          * If the page we've just displayed is in the "Image" namespace,
 637          * we follow it with an upload history of the image and its usage.
 638          */
 639         protected function imageHistory() {
 640                 global $wgOut;
 641
 642                 $this->loadFile();
 643                 $pager = new ImageHistoryPseudoPager( $this );
 644                 $wgOut->addHTML( $pager->getBody() );
 645                 $wgOut->preventClickjacking( $pager->getPreventClickjacking() );
 646
 647                 $this->mPage->getFile()->resetHistory(); // free db resources
 648
 649                 # Exist check because we don't want to show this on pages where an image
 650                 # doesn't exist along with the noimage message, that would suck. -ævar
 651                 if ( $this->mPage->getFile()->exists() ) {
 652                         $this->uploadLinksBox();
 653                 }
 654         }
 655
 656         /**
 657          * @param $target
 658          * @param $limit
 659          * @return ResultWrapper
 660          */
 661         protected function queryImageLinks( $target, $limit ) {
 662                 $dbr = wfGetDB( DB_SLAVE );
 663
 664                 return $dbr->select(
 665                         array( 'imagelinks', 'page' ),
 666                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 667                         array( 'il_to' => $target, 'il_from = page_id' ),
 668                         __METHOD__,
 669                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 670                 );
 671         }
 672
 673         protected function imageLinks() {
 674                 global $wgOut, $wgLang;
 675
 676                 $limit = 100;
 677
 678                 $res = $this->queryImageLinks( $this->getTitle()->getDbKey(), $limit + 1);
 679                 $rows = array();
 680                 $redirects = array();
 681                 foreach ( $res as $row ) {
 682                         if ( $row->page_is_redirect ) {
 683                                 $redirects[$row->page_title] = array();
 684                         }
 685                         $rows[] = $row;
 686                 }
 687                 $count = count( $rows );
 688
 689                 $hasMore = $count > $limit;
 690                 if ( !$hasMore && count( $redirects ) ) {
 691                         $res = $this->queryImageLinks( array_keys( $redirects ),
 692                                 $limit - count( $rows ) + 1 );
 693                         foreach ( $res as $row ) {
 694                                 $redirects[$row->il_to][] = $row;
 695                                 $count++;
 696                         }
 697                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 698                 }
 699
 700                 if ( $count == 0 ) {
 701                         $wgOut->wrapWikiMsg(
 702                                 Html::rawElement( 'div',
 703                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 704                                 'nolinkstoimage'
 705                         );
 706                         return;
 707                 }
 708
 709                 $wgOut->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 710                 if ( !$hasMore ) {
 711                         $wgOut->addWikiMsg( 'linkstoimage', $count );
 712                 } else {
 713                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 714                         $wgOut->addWikiMsg( 'linkstoimage-more',
 715                                 $wgLang->formatNum( $limit ),
 716                                 $this->getTitle()->getPrefixedDBkey()
 717                         );
 718                 }
 719
 720                 $wgOut->addHTML(
 721                         Html::openElement( 'ul',
 722                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 723                 );
 724                 $count = 0;
 725
 726                 // Sort the list by namespace:title
 727                 usort( $rows, array( $this, 'compare' ) );
 728
 729                 // Create links for every element
 730                 $currentCount = 0;
 731                 foreach( $rows as $element ) {
 732                         $currentCount++;
 733                         if ( $currentCount > $limit ) {
 734                                 break;
 735                         }
 736
 737                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 738                         if ( !isset( $redirects[$element->page_title] ) ) {
 739                                 $liContents = $link;
 740                         } else {
 741                                 $ul = "<ul class='mw-imagepage-redirectstofile'>\n";
 742                                 foreach ( $redirects[$element->page_title] as $row ) {
 743                                         $currentCount++;
 744                                         if ( $currentCount > $limit ) {
 745                                                 break;
 746                                         }
 747
 748                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 749                                         $ul .= Html::rawElement(
 750                                                 'li',
 751                                                 array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 752                                                 $link2
 753                                                 ) . "\n";
 754                                 }
 755                                 $ul .= '</ul>';
 756                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 757                                         $link, $ul )->parse();
 758                         }
 759                         $wgOut->addHTML( Html::rawElement(
 760                                         'li',
 761                                         array( 'id' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 762                                         $liContents
 763                                 ) . "\n"
 764                         );
 765
 766                 };
 767                 $wgOut->addHTML( Html::closeElement( 'ul' ) . "\n" );
 768                 $res->free();
 769
 770                 // Add a links to [[Special:Whatlinkshere]]
 771                 if ( $count > $limit ) {
 772                         $wgOut->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 773                 }
 774                 $wgOut->addHTML( Html::closeElement( 'div' ) . "\n" );
 775         }
 776
 777         protected function imageDupes() {
 778                 global $wgOut, $wgLang;
 779
 780                 $this->loadFile();
 781
 782                 $dupes = $this->mPage->getDuplicates();
 783                 if ( count( $dupes ) == 0 ) {
 784                         return;
 785                 }
 786
 787                 $wgOut->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 788                 $wgOut->addWikiMsg( 'duplicatesoffile',
 789                         $wgLang->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 790                 );
 791                 $wgOut->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 792
 793                 /**
 794                  * @var $file File
 795                  */
 796                 foreach ( $dupes as $file ) {
 797                         $fromSrc = '';
 798                         if ( $file->isLocal() ) {
 799                                 $link = Linker::link(
 800                                         $file->getTitle(),
 801                                         null,
 802                                         array(),
 803                                         array(),
 804                                         array( 'known', 'noclasses' )
 805                                 );
 806                         } else {
 807                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 808                                         $file->getTitle()->getPrefixedText() );
 809                                 $fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 810                         }
 811                         $wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 812                 }
 813                 $wgOut->addHTML( "</ul></div>\n" );
 814         }
 815
 816         /**
 817          * Delete the file, or an earlier version of it
 818          */
 819         public function delete() {
 820                 $file = $this->mPage->getFile();
 821                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 822                         // Standard article deletion
 823                         parent::delete();
 824                         return;
 825                 }
 826
 827                 $deleter = new FileDeleteForm( $file );
 828                 $deleter->execute();
 829         }
 830
 831         /**
 832          * Display an error with a wikitext description
 833          *
 834          * @param $description String
 835          */
 836         function showError( $description ) {
 837                 global $wgOut;
 838                 $wgOut->setPageTitle( wfMessage( 'internalerror' ) );
 839                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 840                 $wgOut->setArticleRelated( false );
 841                 $wgOut->enableClientCache( false );
 842                 $wgOut->addWikiText( $description );
 843         }
 844
 845         /**
 846          * Callback for usort() to do link sorts by (namespace, title)
 847          * Function copied from Title::compare()
 848          *
 849          * @param $a object page to compare with
 850          * @param $b object page to compare with
 851          * @return Integer: result of string comparison, or namespace comparison
 852          */
 853         protected function compare( $a, $b ) {
 854                 if ( $a->page_namespace == $b->page_namespace ) {
 855                         return strcmp( $a->page_title, $b->page_title );
 856                 } else {
 857                         return $a->page_namespace - $b->page_namespace;
 858                 }
 859         }
 860 }
 861
 862 /**
 863  * Builds the image revision log shown on image pages
 864  *
 865  * @ingroup Media
 866  */
 867 class ImageHistoryList {
 868
 869         /**
 870          * @var Title
 871          */
 872         protected $title;
 873
 874         /**
 875          * @var File
 876          */
 877         protected $img;
 878
 879         /**
 880          * @var ImagePage
 881          */
 882         protected $imagePage;
 883
 884         /**
 885          * @var File
 886          */
 887         protected $current;
 888
 889         protected $repo, $showThumb;
 890         protected $preventClickjacking = false;
 891
 892         /**
 893          * @param ImagePage $imagePage
 894          */
 895         public function __construct( $imagePage ) {
 896                 global $wgShowArchiveThumbnails;
 897                 $this->current = $imagePage->getFile();
 898                 $this->img = $imagePage->getDisplayedFile();
 899                 $this->title = $imagePage->getTitle();
 900                 $this->imagePage = $imagePage;
 901                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 902         }
 903
 904         /**
 905          * @return ImagePage
 906          */
 907         public function getImagePage() {
 908                 return $this->imagePage;
 909         }
 910
 911         /**
 912          * @return File
 913          */
 914         public function getFile() {
 915                 return $this->img;
 916         }
 917
 918         /**
 919          * @param $navLinks string
 920          * @return string
 921          */
 922         public function beginImageHistoryList( $navLinks = '' ) {
 923                 global $wgOut, $wgUser;
 924                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), wfMsg( 'filehist' ) ) . "\n"
 925                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 926                         . $wgOut->parse( wfMsgNoTrans( 'filehist-help' ) )
 927                         . $navLinks . "\n"
 928                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 929                         . '<tr><td></td>'
 930                         . ( $this->current->isLocal() && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 931                         . '<th>' . wfMsgHtml( 'filehist-datetime' ) . '</th>'
 932                         . ( $this->showThumb ? '<th>' . wfMsgHtml( 'filehist-thumb' ) . '</th>' : '' )
 933                         . '<th>' . wfMsgHtml( 'filehist-dimensions' ) . '</th>'
 934                         . '<th>' . wfMsgHtml( 'filehist-user' ) . '</th>'
 935                         . '<th>' . wfMsgHtml( 'filehist-comment' ) . '</th>'
 936                         . "</tr>\n";
 937         }
 938
 939         /**
 940          * @param $navLinks string
 941          * @return string
 942          */
 943         public function endImageHistoryList( $navLinks = '' ) {
 944                 return "</table>\n$navLinks\n</div>\n";
 945         }
 946
 947         /**
 948          * @param $iscur
 949          * @param $file File
 950          * @return string
 951          */
 952         public function imageHistoryLine( $iscur, $file ) {
 953                 global $wgUser, $wgLang, $wgContLang;
 954
 955                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
 956                 $img = $iscur ? $file->getName() : $file->getArchiveName();
 957                 $user = $file->getUser( 'id' );
 958                 $usertext = $file->getUser( 'text' );
 959                 $description = $file->getDescription();
 960
 961                 $local = $this->current->isLocal();
 962                 $row = $selected = '';
 963
 964                 // Deletion link
 965                 if ( $local && ( $wgUser->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
 966                         $row .= '<td>';
 967                         # Link to remove from history
 968                         if ( $wgUser->isAllowed( 'delete' ) ) {
 969                                 $q = array( 'action' => 'delete' );
 970                                 if ( !$iscur ) {
 971                                         $q['oldimage'] = $img;
 972                                 }
 973                                 $row .= Linker::link(
 974                                         $this->title,
 975                                         wfMsgHtml( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' ),
 976                                         array(), $q, array( 'known' )
 977                                 );
 978                         }
 979                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
 980                         $canHide = $wgUser->isAllowed( 'deleterevision' );
 981                         if ( $canHide || ( $wgUser->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
 982                                 if ( $wgUser->isAllowed( 'delete' ) ) {
 983                                         $row .= '<br />';
 984                                 }
 985                                 // If file is top revision or locked from this user, don't link
 986                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED ) ) {
 987                                         $del = Linker::revDeleteLinkDisabled( $canHide );
 988                                 } else {
 989                                         list( $ts, $name ) = explode( '!', $img, 2 );
 990                                         $query = array(
 991                                                 'type'   => 'oldimage',
 992                                                 'target' => $this->title->getPrefixedText(),
 993                                                 'ids'    => $ts,
 994                                         );
 995                                         $del = Linker::revDeleteLink( $query,
 996                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
 997                                 }
 998                                 $row .= $del;
 999                         }
1000                         $row .= '</td>';
1001                 }
1002
1003                 // Reversion link/current indicator
1004                 $row .= '<td>';
1005                 if ( $iscur ) {
1006                         $row .= wfMsgHtml( 'filehist-current' );
1007                 } elseif ( $local && $wgUser->isLoggedIn() && $this->title->userCan( 'edit' ) ) {
1008                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1009                                 $row .= wfMsgHtml( 'filehist-revert' );
1010                         } else {
1011                                 $row .= Linker::link(
1012                                         $this->title,
1013                                         wfMsgHtml( 'filehist-revert' ),
1014                                         array(),
1015                                         array(
1016                                                 'action' => 'revert',
1017                                                 'oldimage' => $img,
1018                                                 'wpEditToken' => $wgUser->getEditToken( $img )
1019                                         ),
1020                                         array( 'known', 'noclasses' )
1021                                 );
1022                         }
1023                 }
1024                 $row .= '</td>';
1025
1026                 // Date/time and image link
1027                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1028                         $selected = "class='filehistory-selected'";
1029                 }
1030                 $row .= "<td $selected style='white-space: nowrap;'>";
1031                 if ( !$file->userCan( File::DELETED_FILE ) ) {
1032                         # Don't link to unviewable files
1033                         $row .= '<span class="history-deleted">' . $wgLang->timeanddate( $timestamp, true ) . '</span>';
1034                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1035                         if ( $local ) {
1036                                 $this->preventClickjacking();
1037                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1038                                 # Make a link to review the image
1039                                 $url = Linker::link(
1040                                         $revdel,
1041                                         $wgLang->timeanddate( $timestamp, true ),
1042                                         array(),
1043                                         array(
1044                                                 'target' => $this->title->getPrefixedText(),
1045                                                 'file' => $img,
1046                                                 'token' => $wgUser->getEditToken( $img )
1047                                         ),
1048                                         array( 'known', 'noclasses' )
1049                                 );
1050                         } else {
1051                                 $url = $wgLang->timeanddate( $timestamp, true );
1052                         }
1053                         $row .= '<span class="history-deleted">' . $url . '</span>';
1054                 } else {
1055                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1056                         $row .= Xml::element( 'a', array( 'href' => $url ), $wgLang->timeanddate( $timestamp, true ) );
1057                 }
1058                 $row .= "</td>";
1059
1060                 // Thumbnail
1061                 if ( $this->showThumb ) {
1062                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1063                 }
1064
1065                 // Image dimensions + size
1066                 $row .= '<td>';
1067                 $row .= htmlspecialchars( $file->getDimensionsString() );
1068                 $row .= ' <span style="white-space: nowrap;">(' . Linker::formatSize( $file->getSize() ) . ')</span>';
1069                 $row .= '</td>';
1070
1071                 // Uploading user
1072                 $row .= '<td>';
1073                 // Hide deleted usernames
1074                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1075                         $row .= '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
1076                 } else {
1077                         if ( $local ) {
1078                                 $row .= Linker::userLink( $user, $usertext ) . ' <span style="white-space: nowrap;">' .
1079                                 Linker::userToolLinks( $user, $usertext ) . '</span>';
1080                         } else {
1081                                 $row .= htmlspecialchars( $usertext );
1082                         }
1083                 }
1084                 $row .= '</td>';
1085
1086                 // Don't show deleted descriptions
1087                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1088                         $row .= '<td><span class="history-deleted">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></td>';
1089                 } else {
1090                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1091                 }
1092
1093                 $rowClass = null;
1094                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1095                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1096
1097                 return "<tr{$classAttr}>{$row}</tr>\n";
1098         }
1099
1100         /**
1101          * @param $file File
1102          * @return string
1103          */
1104         protected function getThumbForLine( $file ) {
1105                 global $wgLang;
1106
1107                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE ) && !$file->isDeleted( File::DELETED_FILE ) ) {
1108                         $params = array(
1109                                 'width' => '120',
1110                                 'height' => '120',
1111                         );
1112                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1113
1114                         $thumbnail = $file->transform( $params );
1115                         $options = array(
1116                                 'alt' => wfMsg( 'filehist-thumbtext',
1117                                         $wgLang->timeanddate( $timestamp, true ),
1118                                         $wgLang->date( $timestamp, true ),
1119                                         $wgLang->time( $timestamp, true ) ),
1120                                 'file-link' => true,
1121                         );
1122
1123                         if ( !$thumbnail ) {
1124                                 return wfMsgHtml( 'filehist-nothumb' );
1125                         }
1126
1127                         return $thumbnail->toHtml( $options );
1128                 } else {
1129                         return wfMsgHtml( 'filehist-nothumb' );
1130                 }
1131         }
1132
1133         /**
1134          * @param $enable bool
1135          */
1136         protected function preventClickjacking( $enable = true ) {
1137                 $this->preventClickjacking = $enable;
1138         }
1139
1140         /**
1141          * @return bool
1142          */
1143         public function getPreventClickjacking() {
1144                 return $this->preventClickjacking;
1145         }
1146 }
1147
1148 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1149         protected $preventClickjacking = false;
1150
1151         /**
1152          * @var File
1153          */
1154         protected $mImg;
1155
1156         /**
1157          * @var Title
1158          */
1159         protected $mTitle;
1160
1161         /**
1162          * @param ImagePage $imagePage
1163          */
1164         function __construct( $imagePage ) {
1165                 parent::__construct();
1166                 $this->mImagePage = $imagePage;
1167                 $this->mTitle = clone ( $imagePage->getTitle() );
1168                 $this->mTitle->setFragment( '#filehistory' );
1169                 $this->mImg = null;
1170                 $this->mHist = array();
1171                 $this->mRange = array( 0, 0 ); // display range
1172         }
1173
1174         /**
1175          * @return Title
1176          */
1177         function getTitle() {
1178                 return $this->mTitle;
1179         }
1180
1181         function getQueryInfo() {
1182                 return false;
1183         }
1184
1185         /**
1186          * @return string
1187          */
1188         function getIndexField() {
1189                 return '';
1190         }
1191
1192         /**
1193          * @return string
1194          */
1195         function formatRow( $row ) {
1196                 return '';
1197         }
1198
1199         /**
1200          * @return string
1201          */
1202         function getBody() {
1203                 $s = '';
1204                 $this->doQuery();
1205                 if ( count( $this->mHist ) ) {
1206                         $list = new ImageHistoryList( $this->mImagePage );
1207                         # Generate prev/next links
1208                         $navLink = $this->getNavigationBar();
1209                         $s = $list->beginImageHistoryList( $navLink );
1210                         // Skip rows there just for paging links
1211                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1212                                 $file = $this->mHist[$i];
1213                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1214                         }
1215                         $s .= $list->endImageHistoryList( $navLink );
1216
1217                         if ( $list->getPreventClickjacking() ) {
1218                                 $this->preventClickjacking();
1219                         }
1220                 }
1221                 return $s;
1222         }
1223
1224         function doQuery() {
1225                 if ( $this->mQueryDone ) {
1226                         return;
1227                 }
1228                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1229                 if ( !$this->mImg->exists() ) {
1230                         return;
1231                 }
1232                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1233                 if ( $this->mIsBackwards ) {
1234                         // Fetch the file history
1235                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1236                         // The current rev may not meet the offset/limit
1237                         $numRows = count( $this->mHist );
1238                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1239                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1240                         }
1241                 } else {
1242                         // The current rev may not meet the offset
1243                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1244                                 $this->mHist[] = $this->mImg;
1245                         }
1246                         // Old image versions (fetch extra row for nav links)
1247                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1248                         // Fetch the file history
1249                         $this->mHist = array_merge( $this->mHist,
1250                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1251                 }
1252                 $numRows = count( $this->mHist ); // Total number of query results
1253                 if ( $numRows ) {
1254                         # Index value of top item in the list
1255                         $firstIndex = $this->mIsBackwards ?
1256                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1257                         # Discard the extra result row if there is one
1258                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1259                                 if ( $this->mIsBackwards ) {
1260                                         # Index value of item past the index
1261                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1262                                         # Index value of bottom item in the list
1263                                         $lastIndex = $this->mHist[1]->getTimestamp();
1264                                         # Display range
1265                                         $this->mRange = array( 1, $numRows - 1 );
1266                                 } else {
1267                                         # Index value of item past the index
1268                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1269                                         # Index value of bottom item in the list
1270                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1271                                         # Display range
1272                                         $this->mRange = array( 0, $numRows - 2 );
1273                                 }
1274                         } else {
1275                                 # Setting indexes to an empty string means that they will be
1276                                 # omitted if they would otherwise appear in URLs. It just so
1277                                 # happens that this  is the right thing to do in the standard
1278                                 # UI, in all the relevant cases.
1279                                 $this->mPastTheEndIndex = '';
1280                                 # Index value of bottom item in the list
1281                                 $lastIndex = $this->mIsBackwards ?
1282                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1283                                 # Display range
1284                                 $this->mRange = array( 0, $numRows - 1 );
1285                         }
1286                 } else {
1287                         $firstIndex = '';
1288                         $lastIndex = '';
1289                         $this->mPastTheEndIndex = '';
1290                 }
1291                 if ( $this->mIsBackwards ) {
1292                         $this->mIsFirst = ( $numRows < $queryLimit );
1293                         $this->mIsLast = ( $this->mOffset == '' );
1294                         $this->mLastShown = $firstIndex;
1295                         $this->mFirstShown = $lastIndex;
1296                 } else {
1297                         $this->mIsFirst = ( $this->mOffset == '' );
1298                         $this->mIsLast = ( $numRows < $queryLimit );
1299                         $this->mLastShown = $lastIndex;
1300                         $this->mFirstShown = $firstIndex;
1301                 }
1302                 $this->mQueryDone = true;
1303         }
1304
1305         /**
1306          * @param $enable bool
1307          */
1308         protected function preventClickjacking( $enable = true ) {
1309                 $this->preventClickjacking = $enable;
1310         }
1311
1312         /**
1313          * @return bool
1314          */
1315         public function getPreventClickjacking() {
1316                 return $this->preventClickjacking;
1317         }
1318
1319 }