includes/ImagePage.php

   1 <?php
   2 /**
   3  * Special handling for file description pages.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Class for viewing MediaWiki file description pages
  25  *
  26  * @ingroup Media
  27  */
  28 class ImagePage extends Article {
  29
  30         /**
  31          * @var File
  32          */
  33         private $displayImg;
  34         /**
  35          * @var FileRepo
  36          */
  37         private $repo;
  38         private $fileLoaded;
  39
  40         var $mExtraDescription = false;
  41
  42         /**
  43          * @param $title Title
  44          * @return WikiFilePage
  45          */
  46         protected function newPage( Title $title ) {
  47                 // Overload mPage with a file-specific page
  48                 return new WikiFilePage( $title );
  49         }
  50
  51         /**
  52          * Constructor from a page id
  53          * @param int $id article ID to load
  54          * @return ImagePage|null
  55          */
  56         public static function newFromID( $id ) {
  57                 $t = Title::newFromID( $id );
  58                 # @todo FIXME: Doesn't inherit right
  59                 return $t == null ? null : new self( $t );
  60                 # return $t == null ? null : new static( $t ); // PHP 5.3
  61         }
  62
  63         /**
  64          * @param $file File:
  65          * @return void
  66          */
  67         public function setFile( $file ) {
  68                 $this->mPage->setFile( $file );
  69                 $this->displayImg = $file;
  70                 $this->fileLoaded = true;
  71         }
  72
  73         protected function loadFile() {
  74                 if ( $this->fileLoaded ) {
  75                         return;
  76                 }
  77                 $this->fileLoaded = true;
  78
  79                 $this->displayImg = $img = false;
  80                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  81                 if ( !$img ) { // not set by hook?
  82                         $img = wfFindFile( $this->getTitle() );
  83                         if ( !$img ) {
  84                                 $img = wfLocalFile( $this->getTitle() );
  85                         }
  86                 }
  87                 $this->mPage->setFile( $img );
  88                 if ( !$this->displayImg ) { // not set by hook?
  89                         $this->displayImg = $img;
  90                 }
  91                 $this->repo = $img->getRepo();
  92         }
  93
  94         /**
  95          * Handler for action=render
  96          * Include body text only; none of the image extras
  97          */
  98         public function render() {
  99                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
 100                 parent::view();
 101         }
 102
 103         public function view() {
 104                 global $wgShowEXIF;
 105
 106                 $out = $this->getContext()->getOutput();
 107                 $request = $this->getContext()->getRequest();
 108                 $diff = $request->getVal( 'diff' );
 109                 $diffOnly = $request->getBool( 'diffonly', $this->getContext()->getUser()->getOption( 'diffonly' ) );
 110
 111                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( $diff !== null && $diffOnly ) ) {
 112                         parent::view();
 113                         return;
 114                 }
 115
 116                 $this->loadFile();
 117
 118                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
 119                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || $diff !== null ) {
 120                                 // mTitle is the same as the redirect target so ask Article
 121                                 // to perform the redirect for us.
 122                                 $request->setVal( 'diffonly', 'true' );
 123                                 parent::view();
 124                                 return;
 125                         } else {
 126                                 // mTitle is not the same as the redirect target so it is
 127                                 // probably the redirect page itself. Fake the redirect symbol
 128                                 $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 129                                 $out->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 130                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 131                                 $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 132                                 return;
 133                         }
 134                 }
 135
 136                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 137                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 138                         $formattedMetadata = $this->displayImg->formatMetadata();
 139                         $showmeta = $formattedMetadata !== false;
 140                 } else {
 141                         $showmeta = false;
 142                 }
 143
 144                 if ( !$diff && $this->displayImg->exists() ) {
 145                         $out->addHTML( $this->showTOC( $showmeta ) );
 146                 }
 147
 148                 if ( !$diff ) {
 149                         $this->openShowImage();
 150                 }
 151
 152                 # No need to display noarticletext, we use our own message, output in openShowImage()
 153                 if ( $this->mPage->getID() ) {
 154                         # NS_FILE is in the user language, but this section (the actual wikitext)
 155                         # should be in page content language
 156                         $pageLang = $this->getTitle()->getPageViewLanguage();
 157                         $out->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 158                                 'lang' => $pageLang->getHtmlCode(), 'dir' => $pageLang->getDir(),
 159                                 'class' => 'mw-content-' . $pageLang->getDir() ) ) );
 160
 161                         parent::view();
 162
 163                         $out->addHTML( Xml::closeElement( 'div' ) );
 164                 } else {
 165                         # Just need to set the right headers
 166                         $out->setArticleFlag( true );
 167                         $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 168                         $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 169                 }
 170
 171                 # Show shared description, if needed
 172                 if ( $this->mExtraDescription ) {
 173                         $fol = wfMessage( 'shareddescriptionfollows' );
 174                         if ( !$fol->isDisabled() ) {
 175                                 $out->addWikiText( $fol->plain() );
 176                         }
 177                         $out->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 178                 }
 179
 180                 $this->closeShowImage();
 181                 $this->imageHistory();
 182                 // TODO: Cleanup the following
 183
 184                 $out->addHTML( Xml::element( 'h2',
 185                         array( 'id' => 'filelinks' ),
 186                         wfMessage( 'imagelinks' )->text() ) . "\n" );
 187                 $this->imageDupes();
 188                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 189                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 190                 $this->imageLinks();
 191
 192                 # Allow extensions to add something after the image links
 193                 $html = '';
 194                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 195                 if ( $html ) {
 196                         $out->addHTML( $html );
 197                 }
 198
 199                 if ( $showmeta ) {
 200                         $out->addHTML( Xml::element(
 201                                 'h2',
 202                                 array( 'id' => 'metadata' ),
 203                                 wfMessage( 'metadata' )->text() ) . "\n" );
 204                         $out->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 205                         $out->addModules( array( 'mediawiki.action.view.metadata' ) );
 206                 }
 207
 208                 // Add remote Filepage.css
 209                 if ( !$this->repo->isLocal() ) {
 210                         $css = $this->repo->getDescriptionStylesheetUrl();
 211                         if ( $css ) {
 212                                 $out->addStyle( $css );
 213                         }
 214                 }
 215                 // always show the local local Filepage.css, bug 29277
 216                 $out->addModuleStyles( 'filepage' );
 217         }
 218
 219         /**
 220          * @return File
 221          */
 222         public function getDisplayedFile() {
 223                 $this->loadFile();
 224                 return $this->displayImg;
 225         }
 226
 227         /**
 228          * Create the TOC
 229          *
 230          * @param $metadata Boolean: whether or not to show the metadata link
 231          * @return String
 232          */
 233         protected function showTOC( $metadata ) {
 234                 $r = array(
 235                         '<li><a href="#file">' . wfMessage( 'file-anchor-link' )->escaped() . '</a></li>',
 236                         '<li><a href="#filehistory">' . wfMessage( 'filehist' )->escaped() . '</a></li>',
 237                         '<li><a href="#filelinks">' . wfMessage( 'imagelinks' )->escaped() . '</a></li>',
 238                 );
 239                 if ( $metadata ) {
 240                         $r[] = '<li><a href="#metadata">' . wfMessage( 'metadata' )->escaped() . '</a></li>';
 241                 }
 242
 243                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 244
 245                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 246         }
 247
 248         /**
 249          * Make a table with metadata to be shown in the output page.
 250          *
 251          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 252          *
 253          * @param array $metadata the array containing the Exif data
 254          * @return String The metadata table. This is treated as Wikitext (!)
 255          */
 256         protected function makeMetadataTable( $metadata ) {
 257                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 258                 $r .= wfMessage( 'metadata-help' )->plain();
 259                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 260                 foreach ( $metadata as $type => $stuff ) {
 261                         foreach ( $stuff as $v ) {
 262                                 # @todo FIXME: Why is this using escapeId for a class?!
 263                                 $class = Sanitizer::escapeId( $v['id'] );
 264                                 if ( $type == 'collapsed' ) {
 265                                         $class .= ' collapsable'; // sic
 266                                 }
 267                                 $r .= "<tr class=\"$class\">\n";
 268                                 $r .= "<th>{$v['name']}</th>\n";
 269                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 270                         }
 271                 }
 272                 $r .= "</table>\n</div>\n";
 273                 return $r;
 274         }
 275
 276         /**
 277          * Overloading Article's getContentObject method.
 278          *
 279          * Omit noarticletext if sharedupload; text will be fetched from the
 280          * shared upload server if possible.
 281          * @return string
 282          */
 283         public function getContentObject() {
 284                 $this->loadFile();
 285                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 286                         return null;
 287                 }
 288                 return parent::getContentObject();
 289         }
 290
 291         protected function openShowImage() {
 292                 global $wgImageLimits, $wgEnableUploads, $wgSend404Code;
 293
 294                 $this->loadFile();
 295                 $out = $this->getContext()->getOutput();
 296                 $user = $this->getContext()->getUser();
 297                 $lang = $this->getContext()->getLanguage();
 298                 $dirmark = $lang->getDirMarkEntity();
 299                 $request = $this->getContext()->getRequest();
 300
 301                 $max = $this->getImageLimitsFromOption( $user, 'imagesize' );
 302                 $maxWidth = $max[0];
 303                 $maxHeight = $max[1];
 304
 305                 if ( $this->displayImg->exists() ) {
 306                         # image
 307                         $page = $request->getIntOrNull( 'page' );
 308                         if ( is_null( $page ) ) {
 309                                 $params = array();
 310                                 $page = 1;
 311                         } else {
 312                                 $params = array( 'page' => $page );
 313                         }
 314
 315                         $renderLang = $request->getVal( 'lang' );
 316                         if ( !is_null( $renderLang ) ) {
 317                                 $params['lang'] = $renderLang;
 318                         }
 319
 320                         $width_orig = $this->displayImg->getWidth( $page );
 321                         $width = $width_orig;
 322                         $height_orig = $this->displayImg->getHeight( $page );
 323                         $height = $height_orig;
 324
 325                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 326                         $linktext = $filename;
 327
 328                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 329
 330                         if ( $this->displayImg->allowInlineDisplay() ) {
 331                                 # image
 332
 333                                 # "Download high res version" link below the image
 334                                 # $msgsize = wfMessage( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 335                                 # We'll show a thumbnail of this image
 336                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 337                                         # Calculate the thumbnail size.
 338                                         # First case, the limiting factor is the width, not the height.
 339                                         if ( $width / $height >= $maxWidth / $maxHeight ) { // FIXME: Possible division by 0. bug 36911
 340                                                 $height = round( $height * $maxWidth / $width ); // FIXME: Possible division by 0. bug 36911
 341                                                 $width = $maxWidth;
 342                                                 # Note that $height <= $maxHeight now.
 343                                         } else {
 344                                                 $newwidth = floor( $width * $maxHeight / $height ); // FIXME: Possible division by 0. bug 36911
 345                                                 $height = round( $height * $newwidth / $width ); // FIXME: Possible division by 0. bug 36911
 346                                                 $width = $newwidth;
 347                                                 # Note that $height <= $maxHeight now, but might not be identical
 348                                                 # because of rounding.
 349                                         }
 350                                         $linktext = wfMessage( 'show-big-image' )->escaped();
 351                                         if ( $this->displayImg->getRepo()->canTransformVia404() ) {
 352                                                 $thumbSizes = $wgImageLimits;
 353                                                 // Also include the full sized resolution in the list, so
 354                                                 // that users know they can get it. This will link to the
 355                                                 // original file asset if mustRender() === false. In the case
 356                                                 // that we mustRender, some users have indicated that they would
 357                                                 // find it useful to have the full size image in the rendered
 358                                                 // image format.
 359                                                 $thumbSizes[] = array( $width_orig, $height_orig );
 360                                         } else {
 361                                                 # Creating thumb links triggers thumbnail generation.
 362                                                 # Just generate the thumb for the current users prefs.
 363                                                 $thumbSizes = array( $this->getImageLimitsFromOption( $user, 'thumbsize' ) );
 364                                                 if ( !$this->displayImg->mustRender() ) {
 365                                                         // We can safely include a link to the "full-size" preview,
 366                                                         // without actually rendering.
 367                                                         $thumbSizes[] = array( $width_orig, $height_orig );
 368                                                 }
 369                                         }
 370                                         # Generate thumbnails or thumbnail links as needed...
 371                                         $otherSizes = array();
 372                                         foreach ( $thumbSizes as $size ) {
 373                                                 // We include a thumbnail size in the list, if it is
 374                                                 // less than or equal to the original size of the image
 375                                                 // asset ($width_orig/$height_orig). We also exclude
 376                                                 // the current thumbnail's size ($width/$height)
 377                                                 // since that is added to the message separately, so
 378                                                 // it can be denoted as the current size being shown.
 379                                                 if ( $size[0] <= $width_orig && $size[1] <= $height_orig
 380                                                         && $size[0] != $width && $size[1] != $height )
 381                                                 {
 382                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 383                                                         if ( $sizeLink ) {
 384                                                                 $otherSizes[] = $sizeLink;
 385                                                         }
 386                                                 }
 387                                         }
 388                                         $otherSizes = array_unique( $otherSizes );
 389                                         $msgsmall = '';
 390                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 391                                         if ( $sizeLinkBigImagePreview ) {
 392                                                 $msgsmall .= wfMessage( 'show-big-image-preview' )->
 393                                                         rawParams( $sizeLinkBigImagePreview )->
 394                                                         parse();
 395                                         }
 396                                         if ( count( $otherSizes ) ) {
 397                                                 $msgsmall .= ' ' .
 398                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 399                                                         wfMessage( 'show-big-image-other' )->rawParams( $lang->pipeList( $otherSizes ) )->
 400                                                         params( count( $otherSizes ) )->parse()
 401                                                 );
 402                                         }
 403                                 } elseif ( $width == 0 && $height == 0 ) {
 404                                         # Some sort of audio file that doesn't have dimensions
 405                                         # Don't output a no hi res message for such a file
 406                                         $msgsmall = '';
 407                                 } elseif ( $this->displayImg->isVectorized() ) {
 408                                         # For vectorized images, full size is just the frame size
 409                                         $msgsmall = '';
 410                                 } else {
 411                                         # Image is small enough to show full size on image page
 412                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 413                                 }
 414
 415                                 $params['width'] = $width;
 416                                 $params['height'] = $height;
 417                                 $thumbnail = $this->displayImg->transform( $params );
 418                                 Linker::processResponsiveImages( $this->displayImg, $thumbnail, $params );
 419
 420                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 421
 422                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 423                                 if ( $isMulti ) {
 424                                         $out->addModules( 'mediawiki.page.image.pagination' );
 425                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 426                                 }
 427
 428                                 if ( $thumbnail ) {
 429                                         $options = array(
 430                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 431                                                 'file-link' => true,
 432                                         );
 433                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 434                                                 $thumbnail->toHtml( $options ) .
 435                                                 $anchorclose . "</div>\n" );
 436                                 }
 437
 438                                 if ( $isMulti ) {
 439                                         $count = $this->displayImg->pageCount();
 440
 441                                         if ( $page > 1 ) {
 442                                                 $label = $out->parse( wfMessage( 'imgmultipageprev' )->text(), false );
 443                                                 $link = Linker::linkKnown(
 444                                                         $this->getTitle(),
 445                                                         $label,
 446                                                         array(),
 447                                                         array( 'page' => $page - 1 )
 448                                                 );
 449                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 450                                                         array( 'page' => $page - 1 ) );
 451                                         } else {
 452                                                 $thumb1 = '';
 453                                         }
 454
 455                                         if ( $page < $count ) {
 456                                                 $label = wfMessage( 'imgmultipagenext' )->text();
 457                                                 $link = Linker::linkKnown(
 458                                                         $this->getTitle(),
 459                                                         $label,
 460                                                         array(),
 461                                                         array( 'page' => $page + 1 )
 462                                                 );
 463                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 464                                                         array( 'page' => $page + 1 ) );
 465                                         } else {
 466                                                 $thumb2 = '';
 467                                         }
 468
 469                                         global $wgScript;
 470
 471                                         $formParams = array(
 472                                                 'name' => 'pageselector',
 473                                                 'action' => $wgScript,
 474                                         );
 475                                         $options = array();
 476                                         for ( $i = 1; $i <= $count; $i++ ) {
 477                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 478                                         }
 479                                         $select = Xml::tags( 'select',
 480                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 481                                                 implode( "\n", $options ) );
 482
 483                                         $out->addHTML(
 484                                                 '</td><td><div class="multipageimagenavbox">' .
 485                                                 Xml::openElement( 'form', $formParams ) .
 486                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 487                                                         wfMessage( 'imgmultigoto' )->rawParams( $select )->parse() .
 488                                                 Xml::submitButton( wfMessage( 'imgmultigo' )->text() ) .
 489                                                 Xml::closeElement( 'form' ) .
 490                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 491                                         );
 492                                 }
 493                         } elseif ( $this->displayImg->isSafeFile() ) {
 494                                 # if direct link is allowed but it's not a renderable image, show an icon.
 495                                 $icon = $this->displayImg->iconThumb();
 496
 497                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 498                                         $icon->toHtml( array( 'file-link' => true ) ) .
 499                                         "</div>\n" );
 500                         }
 501
 502                         $longDesc = wfMessage( 'parentheses', $this->displayImg->getLongDesc() )->text();
 503
 504                         $medialink = "[[Media:$filename|$linktext]]";
 505
 506                         if ( !$this->displayImg->isSafeFile() ) {
 507                                 $warning = wfMessage( 'mediawarning' )->plain();
 508                                 // dirmark is needed here to separate the file name, which
 509                                 // most likely ends in Latin characters, from the description,
 510                                 // which may begin with the file type. In RTL environment
 511                                 // this will get messy.
 512                                 // The dirmark, however, must not be immediately adjacent
 513                                 // to the filename, because it can get copied with it.
 514                                 // See bug 25277.
 515                                 $out->addWikiText( <<<EOT
 516 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 517 <div class="mediaWarning">$warning</div>
 518 EOT
 519                                         );
 520                         } else {
 521                                 $out->addWikiText( <<<EOT
 522 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 523 </div>
 524 EOT
 525                                 );
 526                         }
 527
 528                         // Add cannot animate thumbnail warning
 529                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 530                                 // Include the extension so wiki admins can
 531                                 // customize it on a per file-type basis
 532                                 // (aka say things like use format X instead).
 533                                 // additionally have a specific message for
 534                                 // file-no-thumb-animation-gif
 535                                 $ext = $this->displayImg->getExtension();
 536                                 $noAnimMesg = wfMessageFallback(
 537                                         'file-no-thumb-animation-' . $ext,
 538                                         'file-no-thumb-animation'
 539                                 )->plain();
 540
 541                                 $out->addWikiText( <<<EOT
 542 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 543 EOT
 544                                 );
 545                         }
 546
 547                         if ( !$this->displayImg->isLocal() ) {
 548                                 $this->printSharedImageText();
 549                         }
 550                 } else {
 551                         # Image does not exist
 552                         if ( !$this->getID() ) {
 553                                 # No article exists either
 554                                 # Show deletion log to be consistent with normal articles
 555                                 LogEventsList::showLogExtract(
 556                                         $out,
 557                                         array( 'delete', 'move' ),
 558                                         $this->getTitle()->getPrefixedText(),
 559                                         '',
 560                                         array( 'lim' => 10,
 561                                                 'conds' => array( "log_action != 'revision'" ),
 562                                                 'showIfEmpty' => false,
 563                                                 'msgKey' => array( 'moveddeleted-notice' )
 564                                         )
 565                                 );
 566                         }
 567
 568                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 569                                 // Only show an upload link if the user can upload
 570                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 571                                 $nofile = array(
 572                                         'filepage-nofile-link',
 573                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 574                                 );
 575                         } else {
 576                                 $nofile = 'filepage-nofile';
 577                         }
 578                         // Note, if there is an image description page, but
 579                         // no image, then this setRobotPolicy is overridden
 580                         // by Article::View().
 581                         $out->setRobotPolicy( 'noindex,nofollow' );
 582                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 583                         if ( !$this->getID() && $wgSend404Code ) {
 584                                 // If there is no image, no shared image, and no description page,
 585                                 // output a 404, to be consistent with articles.
 586                                 $request->response()->header( 'HTTP/1.1 404 Not Found' );
 587                         }
 588                 }
 589                 $out->setFileVersion( $this->displayImg );
 590         }
 591
 592         /**
 593          * Creates an thumbnail of specified size and returns an HTML link to it
 594          * @param array $params Scaler parameters
 595          * @param $width int
 596          * @param $height int
 597          * @return string
 598          */
 599         private function makeSizeLink( $params, $width, $height ) {
 600                 $params['width'] = $width;
 601                 $params['height'] = $height;
 602                 $thumbnail = $this->displayImg->transform( $params );
 603                 if ( $thumbnail && !$thumbnail->isError() ) {
 604                         return Html::rawElement( 'a', array(
 605                                 'href' => $thumbnail->getUrl(),
 606                                 'class' => 'mw-thumbnail-link'
 607                                 ), wfMessage( 'show-big-image-size' )->numParams(
 608                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 609                                 )->parse() );
 610                 } else {
 611                         return '';
 612                 }
 613         }
 614
 615         /**
 616          * Show a notice that the file is from a shared repository
 617          */
 618         protected function printSharedImageText() {
 619                 $out = $this->getContext()->getOutput();
 620                 $this->loadFile();
 621
 622                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 623                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 624
 625                 /* Add canonical to head if there is no local page for this shared file */
 626                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 627                         $out->setCanonicalUrl( $descUrl );
 628                 }
 629
 630                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 631                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 632
 633                 if ( $descUrl && $descText && wfMessage( 'sharedupload-desc-here' )->plain() !== '-' ) {
 634                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 635                 } elseif ( $descUrl && wfMessage( 'sharedupload-desc-there' )->plain() !== '-' ) {
 636                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 637                 } else {
 638                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 639                 }
 640
 641                 if ( $descText ) {
 642                         $this->mExtraDescription = $descText;
 643                 }
 644         }
 645
 646         public function getUploadUrl() {
 647                 $this->loadFile();
 648                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 649                 return $uploadTitle->getFullURL( array(
 650                         'wpDestFile' => $this->mPage->getFile()->getName(),
 651                         'wpForReUpload' => 1
 652                 ) );
 653         }
 654
 655         /**
 656          * Print out the various links at the bottom of the image page, e.g. reupload,
 657          * external editing (and instructions link) etc.
 658          */
 659         protected function uploadLinksBox() {
 660                 global $wgEnableUploads;
 661
 662                 if ( !$wgEnableUploads ) {
 663                         return;
 664                 }
 665
 666                 $this->loadFile();
 667                 if ( !$this->mPage->getFile()->isLocal() ) {
 668                         return;
 669                 }
 670
 671                 $out = $this->getContext()->getOutput();
 672                 $out->addHTML( "<ul>\n" );
 673
 674                 # "Upload a new version of this file" link
 675                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 676                 if ( $canUpload && UploadBase::userCanReUpload( $this->getContext()->getUser(), $this->mPage->getFile()->name ) ) {
 677                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMessage( 'uploadnewversion-linktext' )->text() );
 678                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 679                 } else {
 680                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">" . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 681                 }
 682
 683                 $out->addHTML( "</ul>\n" );
 684         }
 685
 686         protected function closeShowImage() { } # For overloading
 687
 688         /**
 689          * If the page we've just displayed is in the "Image" namespace,
 690          * we follow it with an upload history of the image and its usage.
 691          */
 692         protected function imageHistory() {
 693                 $this->loadFile();
 694                 $out = $this->getContext()->getOutput();
 695                 $pager = new ImageHistoryPseudoPager( $this );
 696                 $out->addHTML( $pager->getBody() );
 697                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 698
 699                 $this->mPage->getFile()->resetHistory(); // free db resources
 700
 701                 # Exist check because we don't want to show this on pages where an image
 702                 # doesn't exist along with the noimage message, that would suck. -ævar
 703                 if ( $this->mPage->getFile()->exists() ) {
 704                         $this->uploadLinksBox();
 705                 }
 706         }
 707
 708         /**
 709          * @param $target
 710          * @param $limit
 711          * @return ResultWrapper
 712          */
 713         protected function queryImageLinks( $target, $limit ) {
 714                 $dbr = wfGetDB( DB_SLAVE );
 715
 716                 return $dbr->select(
 717                         array( 'imagelinks', 'page' ),
 718                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 719                         array( 'il_to' => $target, 'il_from = page_id' ),
 720                         __METHOD__,
 721                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 722                 );
 723         }
 724
 725         protected function imageLinks() {
 726                 $limit = 100;
 727
 728                 $out = $this->getContext()->getOutput();
 729                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 730                 $rows = array();
 731                 $redirects = array();
 732                 foreach ( $res as $row ) {
 733                         if ( $row->page_is_redirect ) {
 734                                 $redirects[$row->page_title] = array();
 735                         }
 736                         $rows[] = $row;
 737                 }
 738                 $count = count( $rows );
 739
 740                 $hasMore = $count > $limit;
 741                 if ( !$hasMore && count( $redirects ) ) {
 742                         $res = $this->queryImageLinks( array_keys( $redirects ),
 743                                 $limit - count( $rows ) + 1 );
 744                         foreach ( $res as $row ) {
 745                                 $redirects[$row->il_to][] = $row;
 746                                 $count++;
 747                         }
 748                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 749                 }
 750
 751                 if ( $count == 0 ) {
 752                         $out->wrapWikiMsg(
 753                                 Html::rawElement( 'div',
 754                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 755                                 'nolinkstoimage'
 756                         );
 757                         return;
 758                 }
 759
 760                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 761                 if ( !$hasMore ) {
 762                         $out->addWikiMsg( 'linkstoimage', $count );
 763                 } else {
 764                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 765                         $out->addWikiMsg( 'linkstoimage-more',
 766                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 767                                 $this->getTitle()->getPrefixedDBkey()
 768                         );
 769                 }
 770
 771                 $out->addHTML(
 772                         Html::openElement( 'ul',
 773                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 774                 );
 775                 $count = 0;
 776
 777                 // Sort the list by namespace:title
 778                 usort( $rows, array( $this, 'compare' ) );
 779
 780                 // Create links for every element
 781                 $currentCount = 0;
 782                 foreach ( $rows as $element ) {
 783                         $currentCount++;
 784                         if ( $currentCount > $limit ) {
 785                                 break;
 786                         }
 787
 788                         $query = array();
 789                         # Add a redirect=no to make redirect pages reachable
 790                         if ( isset( $redirects[$element->page_title] ) ) {
 791                                 $query['redirect'] = 'no';
 792                         }
 793                         $link = Linker::linkKnown(
 794                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 795                                 null, array(), $query
 796                         );
 797                         if ( !isset( $redirects[$element->page_title] ) ) {
 798                                 # No redirects
 799                                 $liContents = $link;
 800                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 801                                 # Redirect without usages
 802                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 803                         } else {
 804                                 # Redirect with usages
 805                                 $li = '';
 806                                 foreach ( $redirects[$element->page_title] as $row ) {
 807                                         $currentCount++;
 808                                         if ( $currentCount > $limit ) {
 809                                                 break;
 810                                         }
 811
 812                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 813                                         $li .= Html::rawElement(
 814                                                 'li',
 815                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 816                                                 $link2
 817                                                 ) . "\n";
 818                                 }
 819
 820                                 $ul = Html::rawElement(
 821                                         'ul',
 822                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 823                                         $li
 824                                         ) . "\n";
 825                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 826                                         $link, $ul )->parse();
 827                         }
 828                         $out->addHTML( Html::rawElement(
 829                                         'li',
 830                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 831                                         $liContents
 832                                 ) . "\n"
 833                         );
 834
 835                 };
 836                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 837                 $res->free();
 838
 839                 // Add a links to [[Special:Whatlinkshere]]
 840                 if ( $count > $limit ) {
 841                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 842                 }
 843                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 844         }
 845
 846         protected function imageDupes() {
 847                 $this->loadFile();
 848                 $out = $this->getContext()->getOutput();
 849
 850                 $dupes = $this->mPage->getDuplicates();
 851                 if ( count( $dupes ) == 0 ) {
 852                         return;
 853                 }
 854
 855                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 856                 $out->addWikiMsg( 'duplicatesoffile',
 857                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 858                 );
 859                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 860
 861                 /**
 862                  * @var $file File
 863                  */
 864                 foreach ( $dupes as $file ) {
 865                         $fromSrc = '';
 866                         if ( $file->isLocal() ) {
 867                                 $link = Linker::linkKnown( $file->getTitle() );
 868                         } else {
 869                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 870                                         $file->getTitle()->getPrefixedText() );
 871                                 $fromSrc = wfMessage( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 872                         }
 873                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 874                 }
 875                 $out->addHTML( "</ul></div>\n" );
 876         }
 877
 878         /**
 879          * Delete the file, or an earlier version of it
 880          */
 881         public function delete() {
 882                 $file = $this->mPage->getFile();
 883                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 884                         // Standard article deletion
 885                         parent::delete();
 886                         return;
 887                 }
 888
 889                 $deleter = new FileDeleteForm( $file );
 890                 $deleter->execute();
 891         }
 892
 893         /**
 894          * Display an error with a wikitext description
 895          *
 896          * @param $description String
 897          */
 898         function showError( $description ) {
 899                 $out = $this->getContext()->getOutput();
 900                 $out->setPageTitle( wfMessage( 'internalerror' ) );
 901                 $out->setRobotPolicy( 'noindex,nofollow' );
 902                 $out->setArticleRelated( false );
 903                 $out->enableClientCache( false );
 904                 $out->addWikiText( $description );
 905         }
 906
 907         /**
 908          * Callback for usort() to do link sorts by (namespace, title)
 909          * Function copied from Title::compare()
 910          *
 911          * @param $a object page to compare with
 912          * @param $b object page to compare with
 913          * @return Integer: result of string comparison, or namespace comparison
 914          */
 915         protected function compare( $a, $b ) {
 916                 if ( $a->page_namespace == $b->page_namespace ) {
 917                         return strcmp( $a->page_title, $b->page_title );
 918                 } else {
 919                         return $a->page_namespace - $b->page_namespace;
 920                 }
 921         }
 922
 923         /**
 924          * Returns the corresponding $wgImageLimits entry for the selected user option
 925          *
 926          * @param $user User
 927          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 928          * @return array
 929          * @since 1.21
 930          */
 931         public function getImageLimitsFromOption( $user, $optionName ) {
 932                 global $wgImageLimits;
 933
 934                 $option = $user->getIntOption( $optionName );
 935                 if ( !isset( $wgImageLimits[$option] ) ) {
 936                         $option = User::getDefaultOption( $optionName );
 937                 }
 938
 939                 // The user offset might still be incorrect, specially if
 940                 // $wgImageLimits got changed (see bug #8858).
 941                 if ( !isset( $wgImageLimits[$option] ) ) {
 942                         // Default to the first offset in $wgImageLimits
 943                         $option = 0;
 944                 }
 945
 946                 return isset( $wgImageLimits[$option] )
 947                         ? $wgImageLimits[$option]
 948                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
 949         }
 950 }
 951
 952 /**
 953  * Builds the image revision log shown on image pages
 954  *
 955  * @ingroup Media
 956  */
 957 class ImageHistoryList extends ContextSource {
 958
 959         /**
 960          * @var Title
 961          */
 962         protected $title;
 963
 964         /**
 965          * @var File
 966          */
 967         protected $img;
 968
 969         /**
 970          * @var ImagePage
 971          */
 972         protected $imagePage;
 973
 974         /**
 975          * @var File
 976          */
 977         protected $current;
 978
 979         protected $repo, $showThumb;
 980         protected $preventClickjacking = false;
 981
 982         /**
 983          * @param ImagePage $imagePage
 984          */
 985         public function __construct( $imagePage ) {
 986                 global $wgShowArchiveThumbnails;
 987                 $this->current = $imagePage->getFile();
 988                 $this->img = $imagePage->getDisplayedFile();
 989                 $this->title = $imagePage->getTitle();
 990                 $this->imagePage = $imagePage;
 991                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 992                 $this->setContext( $imagePage->getContext() );
 993         }
 994
 995         /**
 996          * @return ImagePage
 997          */
 998         public function getImagePage() {
 999                 return $this->imagePage;
1000         }
1001
1002         /**
1003          * @return File
1004          */
1005         public function getFile() {
1006                 return $this->img;
1007         }
1008
1009         /**
1010          * @param $navLinks string
1011          * @return string
1012          */
1013         public function beginImageHistoryList( $navLinks = '' ) {
1014                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() ) . "\n"
1015                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1016                         . $this->msg( 'filehist-help' )->parseAsBlock()
1017                         . $navLinks . "\n"
1018                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1019                         . '<tr><td></td>'
1020                         . ( $this->current->isLocal() && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
1021                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1022                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1023                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1024                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1025                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1026                         . "</tr>\n";
1027         }
1028
1029         /**
1030          * @param $navLinks string
1031          * @return string
1032          */
1033         public function endImageHistoryList( $navLinks = '' ) {
1034                 return "</table>\n$navLinks\n</div>\n";
1035         }
1036
1037         /**
1038          * @param $iscur
1039          * @param $file File
1040          * @return string
1041          */
1042         public function imageHistoryLine( $iscur, $file ) {
1043                 global $wgContLang;
1044
1045                 $user = $this->getUser();
1046                 $lang = $this->getLanguage();
1047                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1048                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1049                 $userId = $file->getUser( 'id' );
1050                 $userText = $file->getUser( 'text' );
1051                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1052
1053                 $local = $this->current->isLocal();
1054                 $row = $selected = '';
1055
1056                 // Deletion link
1057                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1058                         $row .= '<td>';
1059                         # Link to remove from history
1060                         if ( $user->isAllowed( 'delete' ) ) {
1061                                 $q = array( 'action' => 'delete' );
1062                                 if ( !$iscur ) {
1063                                         $q['oldimage'] = $img;
1064                                 }
1065                                 $row .= Linker::linkKnown(
1066                                         $this->title,
1067                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1068                                         array(), $q
1069                                 );
1070                         }
1071                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1072                         $canHide = $user->isAllowed( 'deleterevision' );
1073                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1074                                 if ( $user->isAllowed( 'delete' ) ) {
1075                                         $row .= '<br />';
1076                                 }
1077                                 // If file is top revision or locked from this user, don't link
1078                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1079                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1080                                 } else {
1081                                         list( $ts, ) = explode( '!', $img, 2 );
1082                                         $query = array(
1083                                                 'type' => 'oldimage',
1084                                                 'target' => $this->title->getPrefixedText(),
1085                                                 'ids' => $ts,
1086                                         );
1087                                         $del = Linker::revDeleteLink( $query,
1088                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1089                                 }
1090                                 $row .= $del;
1091                         }
1092                         $row .= '</td>';
1093                 }
1094
1095                 // Reversion link/current indicator
1096                 $row .= '<td>';
1097                 if ( $iscur ) {
1098                         $row .= $this->msg( 'filehist-current' )->escaped();
1099                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1100                         && $this->title->quickUserCan( 'upload', $user )
1101                 ) {
1102                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1103                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1104                         } else {
1105                                 $row .= Linker::linkKnown(
1106                                         $this->title,
1107                                         $this->msg( 'filehist-revert' )->escaped(),
1108                                         array(),
1109                                         array(
1110                                                 'action' => 'revert',
1111                                                 'oldimage' => $img,
1112                                                 'wpEditToken' => $user->getEditToken( $img )
1113                                         )
1114                                 );
1115                         }
1116                 }
1117                 $row .= '</td>';
1118
1119                 // Date/time and image link
1120                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1121                         $selected = "class='filehistory-selected'";
1122                 }
1123                 $row .= "<td $selected style='white-space: nowrap;'>";
1124                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1125                         # Don't link to unviewable files
1126                         $row .= '<span class="history-deleted">' . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1127                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1128                         if ( $local ) {
1129                                 $this->preventClickjacking();
1130                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1131                                 # Make a link to review the image
1132                                 $url = Linker::linkKnown(
1133                                         $revdel,
1134                                         $lang->userTimeAndDate( $timestamp, $user ),
1135                                         array(),
1136                                         array(
1137                                                 'target' => $this->title->getPrefixedText(),
1138                                                 'file' => $img,
1139                                                 'token' => $user->getEditToken( $img )
1140                                         )
1141                                 );
1142                         } else {
1143                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1144                         }
1145                         $row .= '<span class="history-deleted">' . $url . '</span>';
1146                 } else {
1147                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1148                         $row .= Xml::element( 'a', array( 'href' => $url ), $lang->userTimeAndDate( $timestamp, $user ) );
1149                 }
1150                 $row .= "</td>";
1151
1152                 // Thumbnail
1153                 if ( $this->showThumb ) {
1154                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1155                 }
1156
1157                 // Image dimensions + size
1158                 $row .= '<td>';
1159                 $row .= htmlspecialchars( $file->getDimensionsString() );
1160                 $row .= $this->msg( 'word-separator' )->plain();
1161                 $row .= '<span style="white-space: nowrap;">';
1162                 $row .= $this->msg( 'parentheses' )->rawParams( Linker::formatSize( $file->getSize() ) )->plain();
1163                 $row .= '</span>';
1164                 $row .= '</td>';
1165
1166                 // Uploading user
1167                 $row .= '<td>';
1168                 // Hide deleted usernames
1169                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1170                         $row .= '<span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1171                 } else {
1172                         if ( $local ) {
1173                                 $row .= Linker::userLink( $userId, $userText );
1174                                 $row .= $this->msg( 'word-separator' )->plain();
1175                                 $row .= '<span style="white-space: nowrap;">';
1176                                 $row .= Linker::userToolLinks( $userId, $userText );
1177                                 $row .= '</span>';
1178                         } else {
1179                                 $row .= htmlspecialchars( $userText );
1180                         }
1181                 }
1182                 $row .= '</td>';
1183
1184                 // Don't show deleted descriptions
1185                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1186                         $row .= '<td><span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1187                 } else {
1188                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1189                 }
1190
1191                 $rowClass = null;
1192                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1193                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1194
1195                 return "<tr{$classAttr}>{$row}</tr>\n";
1196         }
1197
1198         /**
1199          * @param $file File
1200          * @return string
1201          */
1202         protected function getThumbForLine( $file ) {
1203                 $lang = $this->getLanguage();
1204                 $user = $this->getUser();
1205                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1206                         && !$file->isDeleted( File::DELETED_FILE ) )
1207                 {
1208                         $params = array(
1209                                 'width' => '120',
1210                                 'height' => '120',
1211                         );
1212                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1213
1214                         $thumbnail = $file->transform( $params );
1215                         $options = array(
1216                                 'alt' => $this->msg( 'filehist-thumbtext',
1217                                         $lang->userTimeAndDate( $timestamp, $user ),
1218                                         $lang->userDate( $timestamp, $user ),
1219                                         $lang->userTime( $timestamp, $user ) )->text(),
1220                                 'file-link' => true,
1221                         );
1222
1223                         if ( !$thumbnail ) {
1224                                 return $this->msg( 'filehist-nothumb' )->escaped();
1225                         }
1226
1227                         return $thumbnail->toHtml( $options );
1228                 } else {
1229                         return $this->msg( 'filehist-nothumb' )->escaped();
1230                 }
1231         }
1232
1233         /**
1234          * @param $enable bool
1235          */
1236         protected function preventClickjacking( $enable = true ) {
1237                 $this->preventClickjacking = $enable;
1238         }
1239
1240         /**
1241          * @return bool
1242          */
1243         public function getPreventClickjacking() {
1244                 return $this->preventClickjacking;
1245         }
1246 }
1247
1248 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1249         protected $preventClickjacking = false;
1250
1251         /**
1252          * @var File
1253          */
1254         protected $mImg;
1255
1256         /**
1257          * @var Title
1258          */
1259         protected $mTitle;
1260
1261         /**
1262          * @param ImagePage $imagePage
1263          */
1264         function __construct( $imagePage ) {
1265                 parent::__construct( $imagePage->getContext() );
1266                 $this->mImagePage = $imagePage;
1267                 $this->mTitle = clone ( $imagePage->getTitle() );
1268                 $this->mTitle->setFragment( '#filehistory' );
1269                 $this->mImg = null;
1270                 $this->mHist = array();
1271                 $this->mRange = array( 0, 0 ); // display range
1272         }
1273
1274         /**
1275          * @return Title
1276          */
1277         function getTitle() {
1278                 return $this->mTitle;
1279         }
1280
1281         function getQueryInfo() {
1282                 return false;
1283         }
1284
1285         /**
1286          * @return string
1287          */
1288         function getIndexField() {
1289                 return '';
1290         }
1291
1292         /**
1293          * @param $row object
1294          * @return string
1295          */
1296         function formatRow( $row ) {
1297                 return '';
1298         }
1299
1300         /**
1301          * @return string
1302          */
1303         function getBody() {
1304                 $s = '';
1305                 $this->doQuery();
1306                 if ( count( $this->mHist ) ) {
1307                         $list = new ImageHistoryList( $this->mImagePage );
1308                         # Generate prev/next links
1309                         $navLink = $this->getNavigationBar();
1310                         $s = $list->beginImageHistoryList( $navLink );
1311                         // Skip rows there just for paging links
1312                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1313                                 $file = $this->mHist[$i];
1314                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1315                         }
1316                         $s .= $list->endImageHistoryList( $navLink );
1317
1318                         if ( $list->getPreventClickjacking() ) {
1319                                 $this->preventClickjacking();
1320                         }
1321                 }
1322                 return $s;
1323         }
1324
1325         function doQuery() {
1326                 if ( $this->mQueryDone ) {
1327                         return;
1328                 }
1329                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1330                 if ( !$this->mImg->exists() ) {
1331                         return;
1332                 }
1333                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1334                 if ( $this->mIsBackwards ) {
1335                         // Fetch the file history
1336                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1337                         // The current rev may not meet the offset/limit
1338                         $numRows = count( $this->mHist );
1339                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1340                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1341                         }
1342                 } else {
1343                         // The current rev may not meet the offset
1344                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1345                                 $this->mHist[] = $this->mImg;
1346                         }
1347                         // Old image versions (fetch extra row for nav links)
1348                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1349                         // Fetch the file history
1350                         $this->mHist = array_merge( $this->mHist,
1351                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1352                 }
1353                 $numRows = count( $this->mHist ); // Total number of query results
1354                 if ( $numRows ) {
1355                         # Index value of top item in the list
1356                         $firstIndex = $this->mIsBackwards ?
1357                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1358                         # Discard the extra result row if there is one
1359                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1360                                 if ( $this->mIsBackwards ) {
1361                                         # Index value of item past the index
1362                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1363                                         # Index value of bottom item in the list
1364                                         $lastIndex = $this->mHist[1]->getTimestamp();
1365                                         # Display range
1366                                         $this->mRange = array( 1, $numRows - 1 );
1367                                 } else {
1368                                         # Index value of item past the index
1369                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1370                                         # Index value of bottom item in the list
1371                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1372                                         # Display range
1373                                         $this->mRange = array( 0, $numRows - 2 );
1374                                 }
1375                         } else {
1376                                 # Setting indexes to an empty string means that they will be
1377                                 # omitted if they would otherwise appear in URLs. It just so
1378                                 # happens that this  is the right thing to do in the standard
1379                                 # UI, in all the relevant cases.
1380                                 $this->mPastTheEndIndex = '';
1381                                 # Index value of bottom item in the list
1382                                 $lastIndex = $this->mIsBackwards ?
1383                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1384                                 # Display range
1385                                 $this->mRange = array( 0, $numRows - 1 );
1386                         }
1387                 } else {
1388                         $firstIndex = '';
1389                         $lastIndex = '';
1390                         $this->mPastTheEndIndex = '';
1391                 }
1392                 if ( $this->mIsBackwards ) {
1393                         $this->mIsFirst = ( $numRows < $queryLimit );
1394                         $this->mIsLast = ( $this->mOffset == '' );
1395                         $this->mLastShown = $firstIndex;
1396                         $this->mFirstShown = $lastIndex;
1397                 } else {
1398                         $this->mIsFirst = ( $this->mOffset == '' );
1399                         $this->mIsLast = ( $numRows < $queryLimit );
1400                         $this->mLastShown = $lastIndex;
1401                         $this->mFirstShown = $firstIndex;
1402                 }
1403                 $this->mQueryDone = true;
1404         }
1405
1406         /**
1407          * @param $enable bool
1408          */
1409         protected function preventClickjacking( $enable = true ) {
1410                 $this->preventClickjacking = $enable;
1411         }
1412
1413         /**
1414          * @return bool
1415          */
1416         public function getPreventClickjacking() {
1417                 return $this->preventClickjacking;
1418         }
1419
1420 }