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