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
 419                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 420
 421                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 422                                 if ( $isMulti ) {
 423                                         $out->addModules( 'mediawiki.page.image.pagination' );
 424                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 425                                 }
 426
 427                                 if ( $thumbnail ) {
 428                                         $options = array(
 429                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 430                                                 'file-link' => true,
 431                                         );
 432                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 433                                                 $thumbnail->toHtml( $options ) .
 434                                                 $anchorclose . "</div>\n" );
 435                                 }
 436
 437                                 if ( $isMulti ) {
 438                                         $count = $this->displayImg->pageCount();
 439
 440                                         if ( $page > 1 ) {
 441                                                 $label = $out->parse( wfMessage( 'imgmultipageprev' )->text(), false );
 442                                                 $link = Linker::linkKnown(
 443                                                         $this->getTitle(),
 444                                                         $label,
 445                                                         array(),
 446                                                         array( 'page' => $page - 1 )
 447                                                 );
 448                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 449                                                         array( 'page' => $page - 1 ) );
 450                                         } else {
 451                                                 $thumb1 = '';
 452                                         }
 453
 454                                         if ( $page < $count ) {
 455                                                 $label = wfMessage( 'imgmultipagenext' )->text();
 456                                                 $link = Linker::linkKnown(
 457                                                         $this->getTitle(),
 458                                                         $label,
 459                                                         array(),
 460                                                         array( 'page' => $page + 1 )
 461                                                 );
 462                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 463                                                         array( 'page' => $page + 1 ) );
 464                                         } else {
 465                                                 $thumb2 = '';
 466                                         }
 467
 468                                         global $wgScript;
 469
 470                                         $formParams = array(
 471                                                 'name' => 'pageselector',
 472                                                 'action' => $wgScript,
 473                                         );
 474                                         $options = array();
 475                                         for ( $i = 1; $i <= $count; $i++ ) {
 476                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 477                                         }
 478                                         $select = Xml::tags( 'select',
 479                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 480                                                 implode( "\n", $options ) );
 481
 482                                         $out->addHTML(
 483                                                 '</td><td><div class="multipageimagenavbox">' .
 484                                                 Xml::openElement( 'form', $formParams ) .
 485                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 486                                                         wfMessage( 'imgmultigoto' )->rawParams( $select )->parse() .
 487                                                 Xml::submitButton( wfMessage( 'imgmultigo' )->text() ) .
 488                                                 Xml::closeElement( 'form' ) .
 489                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 490                                         );
 491                                 }
 492                         } elseif ( $this->displayImg->isSafeFile() ) {
 493                                 # if direct link is allowed but it's not a renderable image, show an icon.
 494                                 $icon = $this->displayImg->iconThumb();
 495
 496                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 497                                         $icon->toHtml( array( 'file-link' => true ) ) .
 498                                         "</div>\n" );
 499                         }
 500
 501                         $longDesc = wfMessage( 'parentheses', $this->displayImg->getLongDesc() )->text();
 502
 503                         $medialink = "[[Media:$filename|$linktext]]";
 504
 505                         if ( !$this->displayImg->isSafeFile() ) {
 506                                 $warning = wfMessage( 'mediawarning' )->plain();
 507                                 // dirmark is needed here to separate the file name, which
 508                                 // most likely ends in Latin characters, from the description,
 509                                 // which may begin with the file type. In RTL environment
 510                                 // this will get messy.
 511                                 // The dirmark, however, must not be immediately adjacent
 512                                 // to the filename, because it can get copied with it.
 513                                 // See bug 25277.
 514                                 $out->addWikiText( <<<EOT
 515 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 516 <div class="mediaWarning">$warning</div>
 517 EOT
 518                                         );
 519                         } else {
 520                                 $out->addWikiText( <<<EOT
 521 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 522 </div>
 523 EOT
 524                                 );
 525                         }
 526
 527                         // Add cannot animate thumbnail warning
 528                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 529                                 // Include the extension so wiki admins can
 530                                 // customize it on a per file-type basis
 531                                 // (aka say things like use format X instead).
 532                                 // additionally have a specific message for
 533                                 // file-no-thumb-animation-gif
 534                                 $ext = $this->displayImg->getExtension();
 535                                 $noAnimMesg = wfMessageFallback(
 536                                         'file-no-thumb-animation-' . $ext,
 537                                         'file-no-thumb-animation'
 538                                 )->plain();
 539
 540                                 $out->addWikiText( <<<EOT
 541 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 542 EOT
 543                                 );
 544                         }
 545
 546                         if ( !$this->displayImg->isLocal() ) {
 547                                 $this->printSharedImageText();
 548                         }
 549                 } else {
 550                         # Image does not exist
 551                         if ( !$this->getID() ) {
 552                                 # No article exists either
 553                                 # Show deletion log to be consistent with normal articles
 554                                 LogEventsList::showLogExtract(
 555                                         $out,
 556                                         array( 'delete', 'move' ),
 557                                         $this->getTitle()->getPrefixedText(),
 558                                         '',
 559                                         array( 'lim' => 10,
 560                                                 'conds' => array( "log_action != 'revision'" ),
 561                                                 'showIfEmpty' => false,
 562                                                 'msgKey' => array( 'moveddeleted-notice' )
 563                                         )
 564                                 );
 565                         }
 566
 567                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 568                                 // Only show an upload link if the user can upload
 569                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 570                                 $nofile = array(
 571                                         'filepage-nofile-link',
 572                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 573                                 );
 574                         } else {
 575                                 $nofile = 'filepage-nofile';
 576                         }
 577                         // Note, if there is an image description page, but
 578                         // no image, then this setRobotPolicy is overridden
 579                         // by Article::View().
 580                         $out->setRobotPolicy( 'noindex,nofollow' );
 581                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 582                         if ( !$this->getID() && $wgSend404Code ) {
 583                                 // If there is no image, no shared image, and no description page,
 584                                 // output a 404, to be consistent with articles.
 585                                 $request->response()->header( 'HTTP/1.1 404 Not Found' );
 586                         }
 587                 }
 588                 $out->setFileVersion( $this->displayImg );
 589         }
 590
 591         /**
 592          * Creates an thumbnail of specified size and returns an HTML link to it
 593          * @param array $params Scaler parameters
 594          * @param $width int
 595          * @param $height int
 596          * @return string
 597          */
 598         private function makeSizeLink( $params, $width, $height ) {
 599                 $params['width'] = $width;
 600                 $params['height'] = $height;
 601                 $thumbnail = $this->displayImg->transform( $params );
 602                 if ( $thumbnail && !$thumbnail->isError() ) {
 603                         return Html::rawElement( 'a', array(
 604                                 'href' => $thumbnail->getUrl(),
 605                                 'class' => 'mw-thumbnail-link'
 606                                 ), wfMessage( 'show-big-image-size' )->numParams(
 607                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 608                                 )->parse() );
 609                 } else {
 610                         return '';
 611                 }
 612         }
 613
 614         /**
 615          * Show a notice that the file is from a shared repository
 616          */
 617         protected function printSharedImageText() {
 618                 $out = $this->getContext()->getOutput();
 619                 $this->loadFile();
 620
 621                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 622                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 623
 624                 /* Add canonical to head if there is no local page for this shared file */
 625                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 626                         $out->setCanonicalUrl( $descUrl );
 627                 }
 628
 629                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 630                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 631
 632                 if ( $descUrl && $descText && wfMessage( 'sharedupload-desc-here' )->plain() !== '-' ) {
 633                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 634                 } elseif ( $descUrl && wfMessage( 'sharedupload-desc-there' )->plain() !== '-' ) {
 635                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 636                 } else {
 637                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 638                 }
 639
 640                 if ( $descText ) {
 641                         $this->mExtraDescription = $descText;
 642                 }
 643         }
 644
 645         public function getUploadUrl() {
 646                 $this->loadFile();
 647                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 648                 return $uploadTitle->getFullURL( array(
 649                         'wpDestFile' => $this->mPage->getFile()->getName(),
 650                         'wpForReUpload' => 1
 651                 ) );
 652         }
 653
 654         /**
 655          * Print out the various links at the bottom of the image page, e.g. reupload,
 656          * external editing (and instructions link) etc.
 657          */
 658         protected function uploadLinksBox() {
 659                 global $wgEnableUploads;
 660
 661                 if ( !$wgEnableUploads ) {
 662                         return;
 663                 }
 664
 665                 $this->loadFile();
 666                 if ( !$this->mPage->getFile()->isLocal() ) {
 667                         return;
 668                 }
 669
 670                 $out = $this->getContext()->getOutput();
 671                 $out->addHTML( "<ul>\n" );
 672
 673                 # "Upload a new version of this file" link
 674                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 675                 if ( $canUpload && UploadBase::userCanReUpload( $this->getContext()->getUser(), $this->mPage->getFile()->name ) ) {
 676                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMessage( 'uploadnewversion-linktext' )->text() );
 677                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 678                 } else {
 679                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">" . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 680                 }
 681
 682                 $out->addHTML( "</ul>\n" );
 683         }
 684
 685         protected function closeShowImage() { } # For overloading
 686
 687         /**
 688          * If the page we've just displayed is in the "Image" namespace,
 689          * we follow it with an upload history of the image and its usage.
 690          */
 691         protected function imageHistory() {
 692                 $this->loadFile();
 693                 $out = $this->getContext()->getOutput();
 694                 $pager = new ImageHistoryPseudoPager( $this );
 695                 $out->addHTML( $pager->getBody() );
 696                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 697
 698                 $this->mPage->getFile()->resetHistory(); // free db resources
 699
 700                 # Exist check because we don't want to show this on pages where an image
 701                 # doesn't exist along with the noimage message, that would suck. -ævar
 702                 if ( $this->mPage->getFile()->exists() ) {
 703                         $this->uploadLinksBox();
 704                 }
 705         }
 706
 707         /**
 708          * @param $target
 709          * @param $limit
 710          * @return ResultWrapper
 711          */
 712         protected function queryImageLinks( $target, $limit ) {
 713                 $dbr = wfGetDB( DB_SLAVE );
 714
 715                 return $dbr->select(
 716                         array( 'imagelinks', 'page' ),
 717                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 718                         array( 'il_to' => $target, 'il_from = page_id' ),
 719                         __METHOD__,
 720                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 721                 );
 722         }
 723
 724         protected function imageLinks() {
 725                 $limit = 100;
 726
 727                 $out = $this->getContext()->getOutput();
 728                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 729                 $rows = array();
 730                 $redirects = array();
 731                 foreach ( $res as $row ) {
 732                         if ( $row->page_is_redirect ) {
 733                                 $redirects[$row->page_title] = array();
 734                         }
 735                         $rows[] = $row;
 736                 }
 737                 $count = count( $rows );
 738
 739                 $hasMore = $count > $limit;
 740                 if ( !$hasMore && count( $redirects ) ) {
 741                         $res = $this->queryImageLinks( array_keys( $redirects ),
 742                                 $limit - count( $rows ) + 1 );
 743                         foreach ( $res as $row ) {
 744                                 $redirects[$row->il_to][] = $row;
 745                                 $count++;
 746                         }
 747                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 748                 }
 749
 750                 if ( $count == 0 ) {
 751                         $out->wrapWikiMsg(
 752                                 Html::rawElement( 'div',
 753                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 754                                 'nolinkstoimage'
 755                         );
 756                         return;
 757                 }
 758
 759                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 760                 if ( !$hasMore ) {
 761                         $out->addWikiMsg( 'linkstoimage', $count );
 762                 } else {
 763                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 764                         $out->addWikiMsg( 'linkstoimage-more',
 765                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 766                                 $this->getTitle()->getPrefixedDBkey()
 767                         );
 768                 }
 769
 770                 $out->addHTML(
 771                         Html::openElement( 'ul',
 772                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 773                 );
 774                 $count = 0;
 775
 776                 // Sort the list by namespace:title
 777                 usort( $rows, array( $this, 'compare' ) );
 778
 779                 // Create links for every element
 780                 $currentCount = 0;
 781                 foreach ( $rows as $element ) {
 782                         $currentCount++;
 783                         if ( $currentCount > $limit ) {
 784                                 break;
 785                         }
 786
 787                         $query = array();
 788                         # Add a redirect=no to make redirect pages reachable
 789                         if ( isset( $redirects[$element->page_title] ) ) {
 790                                 $query['redirect'] = 'no';
 791                         }
 792                         $link = Linker::linkKnown(
 793                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 794                                 null, array(), $query
 795                         );
 796                         if ( !isset( $redirects[$element->page_title] ) ) {
 797                                 # No redirects
 798                                 $liContents = $link;
 799                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 800                                 # Redirect without usages
 801                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 802                         } else {
 803                                 # Redirect with usages
 804                                 $li = '';
 805                                 foreach ( $redirects[$element->page_title] as $row ) {
 806                                         $currentCount++;
 807                                         if ( $currentCount > $limit ) {
 808                                                 break;
 809                                         }
 810
 811                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 812                                         $li .= Html::rawElement(
 813                                                 'li',
 814                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 815                                                 $link2
 816                                                 ) . "\n";
 817                                 }
 818
 819                                 $ul = Html::rawElement(
 820                                         'ul',
 821                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 822                                         $li
 823                                         ) . "\n";
 824                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 825                                         $link, $ul )->parse();
 826                         }
 827                         $out->addHTML( Html::rawElement(
 828                                         'li',
 829                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 830                                         $liContents
 831                                 ) . "\n"
 832                         );
 833
 834                 };
 835                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 836                 $res->free();
 837
 838                 // Add a links to [[Special:Whatlinkshere]]
 839                 if ( $count > $limit ) {
 840                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 841                 }
 842                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 843         }
 844
 845         protected function imageDupes() {
 846                 $this->loadFile();
 847                 $out = $this->getContext()->getOutput();
 848
 849                 $dupes = $this->mPage->getDuplicates();
 850                 if ( count( $dupes ) == 0 ) {
 851                         return;
 852                 }
 853
 854                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 855                 $out->addWikiMsg( 'duplicatesoffile',
 856                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 857                 );
 858                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 859
 860                 /**
 861                  * @var $file File
 862                  */
 863                 foreach ( $dupes as $file ) {
 864                         $fromSrc = '';
 865                         if ( $file->isLocal() ) {
 866                                 $link = Linker::linkKnown( $file->getTitle() );
 867                         } else {
 868                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 869                                         $file->getTitle()->getPrefixedText() );
 870                                 $fromSrc = wfMessage( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 871                         }
 872                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 873                 }
 874                 $out->addHTML( "</ul></div>\n" );
 875         }
 876
 877         /**
 878          * Delete the file, or an earlier version of it
 879          */
 880         public function delete() {
 881                 $file = $this->mPage->getFile();
 882                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 883                         // Standard article deletion
 884                         parent::delete();
 885                         return;
 886                 }
 887
 888                 $deleter = new FileDeleteForm( $file );
 889                 $deleter->execute();
 890         }
 891
 892         /**
 893          * Display an error with a wikitext description
 894          *
 895          * @param $description String
 896          */
 897         function showError( $description ) {
 898                 $out = $this->getContext()->getOutput();
 899                 $out->setPageTitle( wfMessage( 'internalerror' ) );
 900                 $out->setRobotPolicy( 'noindex,nofollow' );
 901                 $out->setArticleRelated( false );
 902                 $out->enableClientCache( false );
 903                 $out->addWikiText( $description );
 904         }
 905
 906         /**
 907          * Callback for usort() to do link sorts by (namespace, title)
 908          * Function copied from Title::compare()
 909          *
 910          * @param $a object page to compare with
 911          * @param $b object page to compare with
 912          * @return Integer: result of string comparison, or namespace comparison
 913          */
 914         protected function compare( $a, $b ) {
 915                 if ( $a->page_namespace == $b->page_namespace ) {
 916                         return strcmp( $a->page_title, $b->page_title );
 917                 } else {
 918                         return $a->page_namespace - $b->page_namespace;
 919                 }
 920         }
 921
 922         /**
 923          * Returns the corresponding $wgImageLimits entry for the selected user option
 924          *
 925          * @param $user User
 926          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 927          * @return array
 928          * @since 1.21
 929          */
 930         public function getImageLimitsFromOption( $user, $optionName ) {
 931                 global $wgImageLimits;
 932
 933                 $option = $user->getIntOption( $optionName );
 934                 if ( !isset( $wgImageLimits[$option] ) ) {
 935                         $option = User::getDefaultOption( $optionName );
 936                 }
 937
 938                 // The user offset might still be incorrect, specially if
 939                 // $wgImageLimits got changed (see bug #8858).
 940                 if ( !isset( $wgImageLimits[$option] ) ) {
 941                         // Default to the first offset in $wgImageLimits
 942                         $option = 0;
 943                 }
 944
 945                 return isset( $wgImageLimits[$option] )
 946                         ? $wgImageLimits[$option]
 947                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
 948         }
 949 }
 950
 951 /**
 952  * Builds the image revision log shown on image pages
 953  *
 954  * @ingroup Media
 955  */
 956 class ImageHistoryList extends ContextSource {
 957
 958         /**
 959          * @var Title
 960          */
 961         protected $title;
 962
 963         /**
 964          * @var File
 965          */
 966         protected $img;
 967
 968         /**
 969          * @var ImagePage
 970          */
 971         protected $imagePage;
 972
 973         /**
 974          * @var File
 975          */
 976         protected $current;
 977
 978         protected $repo, $showThumb;
 979         protected $preventClickjacking = false;
 980
 981         /**
 982          * @param ImagePage $imagePage
 983          */
 984         public function __construct( $imagePage ) {
 985                 global $wgShowArchiveThumbnails;
 986                 $this->current = $imagePage->getFile();
 987                 $this->img = $imagePage->getDisplayedFile();
 988                 $this->title = $imagePage->getTitle();
 989                 $this->imagePage = $imagePage;
 990                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 991                 $this->setContext( $imagePage->getContext() );
 992         }
 993
 994         /**
 995          * @return ImagePage
 996          */
 997         public function getImagePage() {
 998                 return $this->imagePage;
 999         }
1000
1001         /**
1002          * @return File
1003          */
1004         public function getFile() {
1005                 return $this->img;
1006         }
1007
1008         /**
1009          * @param $navLinks string
1010          * @return string
1011          */
1012         public function beginImageHistoryList( $navLinks = '' ) {
1013                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() ) . "\n"
1014                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1015                         . $this->msg( 'filehist-help' )->parseAsBlock()
1016                         . $navLinks . "\n"
1017                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1018                         . '<tr><td></td>'
1019                         . ( $this->current->isLocal() && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
1020                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1021                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1022                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1023                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1024                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1025                         . "</tr>\n";
1026         }
1027
1028         /**
1029          * @param $navLinks string
1030          * @return string
1031          */
1032         public function endImageHistoryList( $navLinks = '' ) {
1033                 return "</table>\n$navLinks\n</div>\n";
1034         }
1035
1036         /**
1037          * @param $iscur
1038          * @param $file File
1039          * @return string
1040          */
1041         public function imageHistoryLine( $iscur, $file ) {
1042                 global $wgContLang;
1043
1044                 $user = $this->getUser();
1045                 $lang = $this->getLanguage();
1046                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1047                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1048                 $userId = $file->getUser( 'id' );
1049                 $userText = $file->getUser( 'text' );
1050                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1051
1052                 $local = $this->current->isLocal();
1053                 $row = $selected = '';
1054
1055                 // Deletion link
1056                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1057                         $row .= '<td>';
1058                         # Link to remove from history
1059                         if ( $user->isAllowed( 'delete' ) ) {
1060                                 $q = array( 'action' => 'delete' );
1061                                 if ( !$iscur ) {
1062                                         $q['oldimage'] = $img;
1063                                 }
1064                                 $row .= Linker::linkKnown(
1065                                         $this->title,
1066                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1067                                         array(), $q
1068                                 );
1069                         }
1070                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1071                         $canHide = $user->isAllowed( 'deleterevision' );
1072                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1073                                 if ( $user->isAllowed( 'delete' ) ) {
1074                                         $row .= '<br />';
1075                                 }
1076                                 // If file is top revision or locked from this user, don't link
1077                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1078                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1079                                 } else {
1080                                         list( $ts, ) = explode( '!', $img, 2 );
1081                                         $query = array(
1082                                                 'type' => 'oldimage',
1083                                                 'target' => $this->title->getPrefixedText(),
1084                                                 'ids' => $ts,
1085                                         );
1086                                         $del = Linker::revDeleteLink( $query,
1087                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1088                                 }
1089                                 $row .= $del;
1090                         }
1091                         $row .= '</td>';
1092                 }
1093
1094                 // Reversion link/current indicator
1095                 $row .= '<td>';
1096                 if ( $iscur ) {
1097                         $row .= $this->msg( 'filehist-current' )->escaped();
1098                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1099                         && $this->title->quickUserCan( 'upload', $user )
1100                 ) {
1101                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1102                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1103                         } else {
1104                                 $row .= Linker::linkKnown(
1105                                         $this->title,
1106                                         $this->msg( 'filehist-revert' )->escaped(),
1107                                         array(),
1108                                         array(
1109                                                 'action' => 'revert',
1110                                                 'oldimage' => $img,
1111                                                 'wpEditToken' => $user->getEditToken( $img )
1112                                         )
1113                                 );
1114                         }
1115                 }
1116                 $row .= '</td>';
1117
1118                 // Date/time and image link
1119                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1120                         $selected = "class='filehistory-selected'";
1121                 }
1122                 $row .= "<td $selected style='white-space: nowrap;'>";
1123                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1124                         # Don't link to unviewable files
1125                         $row .= '<span class="history-deleted">' . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1126                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1127                         if ( $local ) {
1128                                 $this->preventClickjacking();
1129                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1130                                 # Make a link to review the image
1131                                 $url = Linker::linkKnown(
1132                                         $revdel,
1133                                         $lang->userTimeAndDate( $timestamp, $user ),
1134                                         array(),
1135                                         array(
1136                                                 'target' => $this->title->getPrefixedText(),
1137                                                 'file' => $img,
1138                                                 'token' => $user->getEditToken( $img )
1139                                         )
1140                                 );
1141                         } else {
1142                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1143                         }
1144                         $row .= '<span class="history-deleted">' . $url . '</span>';
1145                 } else {
1146                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1147                         $row .= Xml::element( 'a', array( 'href' => $url ), $lang->userTimeAndDate( $timestamp, $user ) );
1148                 }
1149                 $row .= "</td>";
1150
1151                 // Thumbnail
1152                 if ( $this->showThumb ) {
1153                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1154                 }
1155
1156                 // Image dimensions + size
1157                 $row .= '<td>';
1158                 $row .= htmlspecialchars( $file->getDimensionsString() );
1159                 $row .= $this->msg( 'word-separator' )->plain();
1160                 $row .= '<span style="white-space: nowrap;">';
1161                 $row .= $this->msg( 'parentheses' )->rawParams( Linker::formatSize( $file->getSize() ) )->plain();
1162                 $row .= '</span>';
1163                 $row .= '</td>';
1164
1165                 // Uploading user
1166                 $row .= '<td>';
1167                 // Hide deleted usernames
1168                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1169                         $row .= '<span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1170                 } else {
1171                         if ( $local ) {
1172                                 $row .= Linker::userLink( $userId, $userText );
1173                                 $row .= $this->msg( 'word-separator' )->plain();
1174                                 $row .= '<span style="white-space: nowrap;">';
1175                                 $row .= Linker::userToolLinks( $userId, $userText );
1176                                 $row .= '</span>';
1177                         } else {
1178                                 $row .= htmlspecialchars( $userText );
1179                         }
1180                 }
1181                 $row .= '</td>';
1182
1183                 // Don't show deleted descriptions
1184                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1185                         $row .= '<td><span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1186                 } else {
1187                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1188                 }
1189
1190                 $rowClass = null;
1191                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1192                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1193
1194                 return "<tr{$classAttr}>{$row}</tr>\n";
1195         }
1196
1197         /**
1198          * @param $file File
1199          * @return string
1200          */
1201         protected function getThumbForLine( $file ) {
1202                 $lang = $this->getLanguage();
1203                 $user = $this->getUser();
1204                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1205                         && !$file->isDeleted( File::DELETED_FILE ) )
1206                 {
1207                         $params = array(
1208                                 'width' => '120',
1209                                 'height' => '120',
1210                         );
1211                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1212
1213                         $thumbnail = $file->transform( $params );
1214                         $options = array(
1215                                 'alt' => $this->msg( 'filehist-thumbtext',
1216                                         $lang->userTimeAndDate( $timestamp, $user ),
1217                                         $lang->userDate( $timestamp, $user ),
1218                                         $lang->userTime( $timestamp, $user ) )->text(),
1219                                 'file-link' => true,
1220                         );
1221
1222                         if ( !$thumbnail ) {
1223                                 return $this->msg( 'filehist-nothumb' )->escaped();
1224                         }
1225
1226                         return $thumbnail->toHtml( $options );
1227                 } else {
1228                         return $this->msg( 'filehist-nothumb' )->escaped();
1229                 }
1230         }
1231
1232         /**
1233          * @param $enable bool
1234          */
1235         protected function preventClickjacking( $enable = true ) {
1236                 $this->preventClickjacking = $enable;
1237         }
1238
1239         /**
1240          * @return bool
1241          */
1242         public function getPreventClickjacking() {
1243                 return $this->preventClickjacking;
1244         }
1245 }
1246
1247 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1248         protected $preventClickjacking = false;
1249
1250         /**
1251          * @var File
1252          */
1253         protected $mImg;
1254
1255         /**
1256          * @var Title
1257          */
1258         protected $mTitle;
1259
1260         /**
1261          * @param ImagePage $imagePage
1262          */
1263         function __construct( $imagePage ) {
1264                 parent::__construct( $imagePage->getContext() );
1265                 $this->mImagePage = $imagePage;
1266                 $this->mTitle = clone ( $imagePage->getTitle() );
1267                 $this->mTitle->setFragment( '#filehistory' );
1268                 $this->mImg = null;
1269                 $this->mHist = array();
1270                 $this->mRange = array( 0, 0 ); // display range
1271         }
1272
1273         /**
1274          * @return Title
1275          */
1276         function getTitle() {
1277                 return $this->mTitle;
1278         }
1279
1280         function getQueryInfo() {
1281                 return false;
1282         }
1283
1284         /**
1285          * @return string
1286          */
1287         function getIndexField() {
1288                 return '';
1289         }
1290
1291         /**
1292          * @param $row object
1293          * @return string
1294          */
1295         function formatRow( $row ) {
1296                 return '';
1297         }
1298
1299         /**
1300          * @return string
1301          */
1302         function getBody() {
1303                 $s = '';
1304                 $this->doQuery();
1305                 if ( count( $this->mHist ) ) {
1306                         $list = new ImageHistoryList( $this->mImagePage );
1307                         # Generate prev/next links
1308                         $navLink = $this->getNavigationBar();
1309                         $s = $list->beginImageHistoryList( $navLink );
1310                         // Skip rows there just for paging links
1311                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1312                                 $file = $this->mHist[$i];
1313                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1314                         }
1315                         $s .= $list->endImageHistoryList( $navLink );
1316
1317                         if ( $list->getPreventClickjacking() ) {
1318                                 $this->preventClickjacking();
1319                         }
1320                 }
1321                 return $s;
1322         }
1323
1324         function doQuery() {
1325                 if ( $this->mQueryDone ) {
1326                         return;
1327                 }
1328                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1329                 if ( !$this->mImg->exists() ) {
1330                         return;
1331                 }
1332                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1333                 if ( $this->mIsBackwards ) {
1334                         // Fetch the file history
1335                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1336                         // The current rev may not meet the offset/limit
1337                         $numRows = count( $this->mHist );
1338                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1339                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1340                         }
1341                 } else {
1342                         // The current rev may not meet the offset
1343                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1344                                 $this->mHist[] = $this->mImg;
1345                         }
1346                         // Old image versions (fetch extra row for nav links)
1347                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1348                         // Fetch the file history
1349                         $this->mHist = array_merge( $this->mHist,
1350                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1351                 }
1352                 $numRows = count( $this->mHist ); // Total number of query results
1353                 if ( $numRows ) {
1354                         # Index value of top item in the list
1355                         $firstIndex = $this->mIsBackwards ?
1356                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1357                         # Discard the extra result row if there is one
1358                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1359                                 if ( $this->mIsBackwards ) {
1360                                         # Index value of item past the index
1361                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1362                                         # Index value of bottom item in the list
1363                                         $lastIndex = $this->mHist[1]->getTimestamp();
1364                                         # Display range
1365                                         $this->mRange = array( 1, $numRows - 1 );
1366                                 } else {
1367                                         # Index value of item past the index
1368                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1369                                         # Index value of bottom item in the list
1370                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1371                                         # Display range
1372                                         $this->mRange = array( 0, $numRows - 2 );
1373                                 }
1374                         } else {
1375                                 # Setting indexes to an empty string means that they will be
1376                                 # omitted if they would otherwise appear in URLs. It just so
1377                                 # happens that this  is the right thing to do in the standard
1378                                 # UI, in all the relevant cases.
1379                                 $this->mPastTheEndIndex = '';
1380                                 # Index value of bottom item in the list
1381                                 $lastIndex = $this->mIsBackwards ?
1382                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1383                                 # Display range
1384                                 $this->mRange = array( 0, $numRows - 1 );
1385                         }
1386                 } else {
1387                         $firstIndex = '';
1388                         $lastIndex = '';
1389                         $this->mPastTheEndIndex = '';
1390                 }
1391                 if ( $this->mIsBackwards ) {
1392                         $this->mIsFirst = ( $numRows < $queryLimit );
1393                         $this->mIsLast = ( $this->mOffset == '' );
1394                         $this->mLastShown = $firstIndex;
1395                         $this->mFirstShown = $lastIndex;
1396                 } else {
1397                         $this->mIsFirst = ( $this->mOffset == '' );
1398                         $this->mIsLast = ( $numRows < $queryLimit );
1399                         $this->mLastShown = $lastIndex;
1400                         $this->mFirstShown = $firstIndex;
1401                 }
1402                 $this->mQueryDone = true;
1403         }
1404
1405         /**
1406          * @param $enable bool
1407          */
1408         protected function preventClickjacking( $enable = true ) {
1409                 $this->preventClickjacking = $enable;
1410         }
1411
1412         /**
1413          * @return bool
1414          */
1415         public function getPreventClickjacking() {
1416                 return $this->preventClickjacking;
1417         }
1418
1419 }