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                                         // Handled by mediawiki.action.view.metadata module
 266                                         // and skins/common/shared.css.
 267                                         $class .= ' collapsable';
 268                                 }
 269                                 $r .= "<tr class=\"$class\">\n";
 270                                 $r .= "<th>{$v['name']}</th>\n";
 271                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 272                         }
 273                 }
 274                 $r .= "</table>\n</div>\n";
 275                 return $r;
 276         }
 277
 278         /**
 279          * Overloading Article's getContentObject method.
 280          *
 281          * Omit noarticletext if sharedupload; text will be fetched from the
 282          * shared upload server if possible.
 283          * @return string
 284          */
 285         public function getContentObject() {
 286                 $this->loadFile();
 287                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 288                         return null;
 289                 }
 290                 return parent::getContentObject();
 291         }
 292
 293         protected function openShowImage() {
 294                 global $wgImageLimits, $wgEnableUploads, $wgSend404Code;
 295
 296                 $this->loadFile();
 297                 $out = $this->getContext()->getOutput();
 298                 $user = $this->getContext()->getUser();
 299                 $lang = $this->getContext()->getLanguage();
 300                 $dirmark = $lang->getDirMarkEntity();
 301                 $request = $this->getContext()->getRequest();
 302
 303                 $max = $this->getImageLimitsFromOption( $user, 'imagesize' );
 304                 $maxWidth = $max[0];
 305                 $maxHeight = $max[1];
 306
 307                 if ( $this->displayImg->exists() ) {
 308                         # image
 309                         $page = $request->getIntOrNull( 'page' );
 310                         if ( is_null( $page ) ) {
 311                                 $params = array();
 312                                 $page = 1;
 313                         } else {
 314                                 $params = array( 'page' => $page );
 315                         }
 316
 317                         $renderLang = $request->getVal( 'lang' );
 318                         if ( !is_null( $renderLang ) ) {
 319                                 $handler = $this->displayImg->getHandler();
 320                                 if ( $handler && $handler->validateParam( 'lang', $renderLang ) ) {
 321                                         $params['lang'] = $renderLang;
 322                                 } else {
 323                                         $renderLang = null;
 324                                 }
 325                         }
 326
 327                         $width_orig = $this->displayImg->getWidth( $page );
 328                         $width = $width_orig;
 329                         $height_orig = $this->displayImg->getHeight( $page );
 330                         $height = $height_orig;
 331
 332                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 333                         $linktext = $filename;
 334
 335                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 336
 337                         if ( $this->displayImg->allowInlineDisplay() ) {
 338                                 # image
 339
 340                                 # "Download high res version" link below the image
 341                                 # $msgsize = wfMessage( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 342                                 # We'll show a thumbnail of this image
 343                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 344                                         # Calculate the thumbnail size.
 345                                         # First case, the limiting factor is the width, not the height.
 346                                         if ( $width / $height >= $maxWidth / $maxHeight ) { // FIXME: Possible division by 0. bug 36911
 347                                                 $height = round( $height * $maxWidth / $width ); // FIXME: Possible division by 0. bug 36911
 348                                                 $width = $maxWidth;
 349                                                 # Note that $height <= $maxHeight now.
 350                                         } else {
 351                                                 $newwidth = floor( $width * $maxHeight / $height ); // FIXME: Possible division by 0. bug 36911
 352                                                 $height = round( $height * $newwidth / $width ); // FIXME: Possible division by 0. bug 36911
 353                                                 $width = $newwidth;
 354                                                 # Note that $height <= $maxHeight now, but might not be identical
 355                                                 # because of rounding.
 356                                         }
 357                                         $linktext = wfMessage( 'show-big-image' )->escaped();
 358                                         if ( $this->displayImg->getRepo()->canTransformVia404() ) {
 359                                                 $thumbSizes = $wgImageLimits;
 360                                                 // Also include the full sized resolution in the list, so
 361                                                 // that users know they can get it. This will link to the
 362                                                 // original file asset if mustRender() === false. In the case
 363                                                 // that we mustRender, some users have indicated that they would
 364                                                 // find it useful to have the full size image in the rendered
 365                                                 // image format.
 366                                                 $thumbSizes[] = array( $width_orig, $height_orig );
 367                                         } else {
 368                                                 # Creating thumb links triggers thumbnail generation.
 369                                                 # Just generate the thumb for the current users prefs.
 370                                                 $thumbSizes = array( $this->getImageLimitsFromOption( $user, 'thumbsize' ) );
 371                                                 if ( !$this->displayImg->mustRender() ) {
 372                                                         // We can safely include a link to the "full-size" preview,
 373                                                         // without actually rendering.
 374                                                         $thumbSizes[] = array( $width_orig, $height_orig );
 375                                                 }
 376                                         }
 377                                         # Generate thumbnails or thumbnail links as needed...
 378                                         $otherSizes = array();
 379                                         foreach ( $thumbSizes as $size ) {
 380                                                 // We include a thumbnail size in the list, if it is
 381                                                 // less than or equal to the original size of the image
 382                                                 // asset ($width_orig/$height_orig). We also exclude
 383                                                 // the current thumbnail's size ($width/$height)
 384                                                 // since that is added to the message separately, so
 385                                                 // it can be denoted as the current size being shown.
 386                                                 if ( $size[0] <= $width_orig && $size[1] <= $height_orig
 387                                                         && $size[0] != $width && $size[1] != $height
 388                                                 ) {
 389                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 390                                                         if ( $sizeLink ) {
 391                                                                 $otherSizes[] = $sizeLink;
 392                                                         }
 393                                                 }
 394                                         }
 395                                         $otherSizes = array_unique( $otherSizes );
 396                                         $msgsmall = '';
 397                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 398                                         if ( $sizeLinkBigImagePreview ) {
 399                                                 $msgsmall .= wfMessage( 'show-big-image-preview' )->
 400                                                         rawParams( $sizeLinkBigImagePreview )->
 401                                                         parse();
 402                                         }
 403                                         if ( count( $otherSizes ) ) {
 404                                                 $msgsmall .= ' ' .
 405                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 406                                                         wfMessage( 'show-big-image-other' )->rawParams( $lang->pipeList( $otherSizes ) )->
 407                                                         params( count( $otherSizes ) )->parse()
 408                                                 );
 409                                         }
 410                                 } elseif ( $width == 0 && $height == 0 ) {
 411                                         # Some sort of audio file that doesn't have dimensions
 412                                         # Don't output a no hi res message for such a file
 413                                         $msgsmall = '';
 414                                 } elseif ( $this->displayImg->isVectorized() ) {
 415                                         # For vectorized images, full size is just the frame size
 416                                         $msgsmall = '';
 417                                 } else {
 418                                         # Image is small enough to show full size on image page
 419                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 420                                 }
 421
 422                                 $params['width'] = $width;
 423                                 $params['height'] = $height;
 424                                 $thumbnail = $this->displayImg->transform( $params );
 425                                 Linker::processResponsiveImages( $this->displayImg, $thumbnail, $params );
 426
 427                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 428
 429                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 430                                 if ( $isMulti ) {
 431                                         $out->addModules( 'mediawiki.page.image.pagination' );
 432                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 433                                 }
 434
 435                                 if ( $thumbnail ) {
 436                                         $options = array(
 437                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 438                                                 'file-link' => true,
 439                                         );
 440                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 441                                                 $thumbnail->toHtml( $options ) .
 442                                                 $anchorclose . "</div>\n" );
 443                                 }
 444
 445                                 if ( $isMulti ) {
 446                                         $count = $this->displayImg->pageCount();
 447
 448                                         if ( $page > 1 ) {
 449                                                 $label = $out->parse( wfMessage( 'imgmultipageprev' )->text(), false );
 450                                                 $link = Linker::linkKnown(
 451                                                         $this->getTitle(),
 452                                                         $label,
 453                                                         array(),
 454                                                         array( 'page' => $page - 1 )
 455                                                 );
 456                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 457                                                         array( 'page' => $page - 1 ) );
 458                                         } else {
 459                                                 $thumb1 = '';
 460                                         }
 461
 462                                         if ( $page < $count ) {
 463                                                 $label = wfMessage( 'imgmultipagenext' )->text();
 464                                                 $link = Linker::linkKnown(
 465                                                         $this->getTitle(),
 466                                                         $label,
 467                                                         array(),
 468                                                         array( 'page' => $page + 1 )
 469                                                 );
 470                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 471                                                         array( 'page' => $page + 1 ) );
 472                                         } else {
 473                                                 $thumb2 = '';
 474                                         }
 475
 476                                         global $wgScript;
 477
 478                                         $formParams = array(
 479                                                 'name' => 'pageselector',
 480                                                 'action' => $wgScript,
 481                                         );
 482                                         $options = array();
 483                                         for ( $i = 1; $i <= $count; $i++ ) {
 484                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 485                                         }
 486                                         $select = Xml::tags( 'select',
 487                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 488                                                 implode( "\n", $options ) );
 489
 490                                         $out->addHTML(
 491                                                 '</td><td><div class="multipageimagenavbox">' .
 492                                                 Xml::openElement( 'form', $formParams ) .
 493                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 494                                                         wfMessage( 'imgmultigoto' )->rawParams( $select )->parse() .
 495                                                 Xml::submitButton( wfMessage( 'imgmultigo' )->text() ) .
 496                                                 Xml::closeElement( 'form' ) .
 497                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 498                                         );
 499                                 }
 500                         } elseif ( $this->displayImg->isSafeFile() ) {
 501                                 # if direct link is allowed but it's not a renderable image, show an icon.
 502                                 $icon = $this->displayImg->iconThumb();
 503
 504                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 505                                         $icon->toHtml( array( 'file-link' => true ) ) .
 506                                         "</div>\n" );
 507                         }
 508
 509                         $longDesc = wfMessage( 'parentheses', $this->displayImg->getLongDesc() )->text();
 510
 511                         $medialink = "[[Media:$filename|$linktext]]";
 512
 513                         if ( !$this->displayImg->isSafeFile() ) {
 514                                 $warning = wfMessage( 'mediawarning' )->plain();
 515                                 // dirmark is needed here to separate the file name, which
 516                                 // most likely ends in Latin characters, from the description,
 517                                 // which may begin with the file type. In RTL environment
 518                                 // this will get messy.
 519                                 // The dirmark, however, must not be immediately adjacent
 520                                 // to the filename, because it can get copied with it.
 521                                 // See bug 25277.
 522                                 $out->addWikiText( <<<EOT
 523 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 524 <div class="mediaWarning">$warning</div>
 525 EOT
 526                                         );
 527                         } else {
 528                                 $out->addWikiText( <<<EOT
 529 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 530 </div>
 531 EOT
 532                                 );
 533                         }
 534
 535                         $renderLangOptions = $this->displayImg->getAvailableLanguages();
 536                         if ( count( $renderLangOptions ) >= 1 ) {
 537                                 $currentLanguage = $renderLang;
 538                                 $defaultLang = $this->displayImg->getDefaultRenderLanguage();
 539                                 if ( is_null( $currentLanguage ) ) {
 540                                         $currentLanguage = $defaultLang;
 541                                 }
 542                                 $out->addHtml( $this->doRenderLangOpt( $renderLangOptions, $currentLanguage, $defaultLang ) );
 543                         }
 544
 545                         // Add cannot animate thumbnail warning
 546                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 547                                 // Include the extension so wiki admins can
 548                                 // customize it on a per file-type basis
 549                                 // (aka say things like use format X instead).
 550                                 // additionally have a specific message for
 551                                 // file-no-thumb-animation-gif
 552                                 $ext = $this->displayImg->getExtension();
 553                                 $noAnimMesg = wfMessageFallback(
 554                                         'file-no-thumb-animation-' . $ext,
 555                                         'file-no-thumb-animation'
 556                                 )->plain();
 557
 558                                 $out->addWikiText( <<<EOT
 559 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 560 EOT
 561                                 );
 562                         }
 563
 564                         if ( !$this->displayImg->isLocal() ) {
 565                                 $this->printSharedImageText();
 566                         }
 567                 } else {
 568                         # Image does not exist
 569                         if ( !$this->getID() ) {
 570                                 # No article exists either
 571                                 # Show deletion log to be consistent with normal articles
 572                                 LogEventsList::showLogExtract(
 573                                         $out,
 574                                         array( 'delete', 'move' ),
 575                                         $this->getTitle()->getPrefixedText(),
 576                                         '',
 577                                         array( 'lim' => 10,
 578                                                 'conds' => array( "log_action != 'revision'" ),
 579                                                 'showIfEmpty' => false,
 580                                                 'msgKey' => array( 'moveddeleted-notice' )
 581                                         )
 582                                 );
 583                         }
 584
 585                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 586                                 // Only show an upload link if the user can upload
 587                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 588                                 $nofile = array(
 589                                         'filepage-nofile-link',
 590                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 591                                 );
 592                         } else {
 593                                 $nofile = 'filepage-nofile';
 594                         }
 595                         // Note, if there is an image description page, but
 596                         // no image, then this setRobotPolicy is overridden
 597                         // by Article::View().
 598                         $out->setRobotPolicy( 'noindex,nofollow' );
 599                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 600                         if ( !$this->getID() && $wgSend404Code ) {
 601                                 // If there is no image, no shared image, and no description page,
 602                                 // output a 404, to be consistent with articles.
 603                                 $request->response()->header( 'HTTP/1.1 404 Not Found' );
 604                         }
 605                 }
 606                 $out->setFileVersion( $this->displayImg );
 607         }
 608
 609         /**
 610          * Creates an thumbnail of specified size and returns an HTML link to it
 611          * @param array $params Scaler parameters
 612          * @param $width int
 613          * @param $height int
 614          * @return string
 615          */
 616         private function makeSizeLink( $params, $width, $height ) {
 617                 $params['width'] = $width;
 618                 $params['height'] = $height;
 619                 $thumbnail = $this->displayImg->transform( $params );
 620                 if ( $thumbnail && !$thumbnail->isError() ) {
 621                         return Html::rawElement( 'a', array(
 622                                 'href' => $thumbnail->getUrl(),
 623                                 'class' => 'mw-thumbnail-link'
 624                                 ), wfMessage( 'show-big-image-size' )->numParams(
 625                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 626                                 )->parse() );
 627                 } else {
 628                         return '';
 629                 }
 630         }
 631
 632         /**
 633          * Show a notice that the file is from a shared repository
 634          */
 635         protected function printSharedImageText() {
 636                 $out = $this->getContext()->getOutput();
 637                 $this->loadFile();
 638
 639                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 640                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 641
 642                 /* Add canonical to head if there is no local page for this shared file */
 643                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 644                         $out->setCanonicalUrl( $descUrl );
 645                 }
 646
 647                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 648                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 649
 650                 if ( $descUrl && $descText && wfMessage( 'sharedupload-desc-here' )->plain() !== '-' ) {
 651                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 652                 } elseif ( $descUrl && wfMessage( 'sharedupload-desc-there' )->plain() !== '-' ) {
 653                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 654                 } else {
 655                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 656                 }
 657
 658                 if ( $descText ) {
 659                         $this->mExtraDescription = $descText;
 660                 }
 661         }
 662
 663         public function getUploadUrl() {
 664                 $this->loadFile();
 665                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 666                 return $uploadTitle->getFullURL( array(
 667                         'wpDestFile' => $this->mPage->getFile()->getName(),
 668                         'wpForReUpload' => 1
 669                 ) );
 670         }
 671
 672         /**
 673          * Print out the various links at the bottom of the image page, e.g. reupload,
 674          * external editing (and instructions link) etc.
 675          */
 676         protected function uploadLinksBox() {
 677                 global $wgEnableUploads;
 678
 679                 if ( !$wgEnableUploads ) {
 680                         return;
 681                 }
 682
 683                 $this->loadFile();
 684                 if ( !$this->mPage->getFile()->isLocal() ) {
 685                         return;
 686                 }
 687
 688                 $out = $this->getContext()->getOutput();
 689                 $out->addHTML( "<ul>\n" );
 690
 691                 # "Upload a new version of this file" link
 692                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 693                 if ( $canUpload && UploadBase::userCanReUpload( $this->getContext()->getUser(), $this->mPage->getFile()->name ) ) {
 694                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMessage( 'uploadnewversion-linktext' )->text() );
 695                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 696                 } else {
 697                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">" . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 698                 }
 699
 700                 $out->addHTML( "</ul>\n" );
 701         }
 702
 703         protected function closeShowImage() { } # For overloading
 704
 705         /**
 706          * If the page we've just displayed is in the "Image" namespace,
 707          * we follow it with an upload history of the image and its usage.
 708          */
 709         protected function imageHistory() {
 710                 $this->loadFile();
 711                 $out = $this->getContext()->getOutput();
 712                 $pager = new ImageHistoryPseudoPager( $this );
 713                 $out->addHTML( $pager->getBody() );
 714                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 715
 716                 $this->mPage->getFile()->resetHistory(); // free db resources
 717
 718                 # Exist check because we don't want to show this on pages where an image
 719                 # doesn't exist along with the noimage message, that would suck. -ævar
 720                 if ( $this->mPage->getFile()->exists() ) {
 721                         $this->uploadLinksBox();
 722                 }
 723         }
 724
 725         /**
 726          * @param $target
 727          * @param $limit
 728          * @return ResultWrapper
 729          */
 730         protected function queryImageLinks( $target, $limit ) {
 731                 $dbr = wfGetDB( DB_SLAVE );
 732
 733                 return $dbr->select(
 734                         array( 'imagelinks', 'page' ),
 735                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 736                         array( 'il_to' => $target, 'il_from = page_id' ),
 737                         __METHOD__,
 738                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 739                 );
 740         }
 741
 742         protected function imageLinks() {
 743                 $limit = 100;
 744
 745                 $out = $this->getContext()->getOutput();
 746                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 747                 $rows = array();
 748                 $redirects = array();
 749                 foreach ( $res as $row ) {
 750                         if ( $row->page_is_redirect ) {
 751                                 $redirects[$row->page_title] = array();
 752                         }
 753                         $rows[] = $row;
 754                 }
 755                 $count = count( $rows );
 756
 757                 $hasMore = $count > $limit;
 758                 if ( !$hasMore && count( $redirects ) ) {
 759                         $res = $this->queryImageLinks( array_keys( $redirects ),
 760                                 $limit - count( $rows ) + 1 );
 761                         foreach ( $res as $row ) {
 762                                 $redirects[$row->il_to][] = $row;
 763                                 $count++;
 764                         }
 765                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 766                 }
 767
 768                 if ( $count == 0 ) {
 769                         $out->wrapWikiMsg(
 770                                 Html::rawElement( 'div',
 771                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 772                                 'nolinkstoimage'
 773                         );
 774                         return;
 775                 }
 776
 777                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 778                 if ( !$hasMore ) {
 779                         $out->addWikiMsg( 'linkstoimage', $count );
 780                 } else {
 781                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 782                         $out->addWikiMsg( 'linkstoimage-more',
 783                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 784                                 $this->getTitle()->getPrefixedDBkey()
 785                         );
 786                 }
 787
 788                 $out->addHTML(
 789                         Html::openElement( 'ul',
 790                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 791                 );
 792                 $count = 0;
 793
 794                 // Sort the list by namespace:title
 795                 usort( $rows, array( $this, 'compare' ) );
 796
 797                 // Create links for every element
 798                 $currentCount = 0;
 799                 foreach ( $rows as $element ) {
 800                         $currentCount++;
 801                         if ( $currentCount > $limit ) {
 802                                 break;
 803                         }
 804
 805                         $query = array();
 806                         # Add a redirect=no to make redirect pages reachable
 807                         if ( isset( $redirects[$element->page_title] ) ) {
 808                                 $query['redirect'] = 'no';
 809                         }
 810                         $link = Linker::linkKnown(
 811                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 812                                 null, array(), $query
 813                         );
 814                         if ( !isset( $redirects[$element->page_title] ) ) {
 815                                 # No redirects
 816                                 $liContents = $link;
 817                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 818                                 # Redirect without usages
 819                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 820                         } else {
 821                                 # Redirect with usages
 822                                 $li = '';
 823                                 foreach ( $redirects[$element->page_title] as $row ) {
 824                                         $currentCount++;
 825                                         if ( $currentCount > $limit ) {
 826                                                 break;
 827                                         }
 828
 829                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 830                                         $li .= Html::rawElement(
 831                                                 'li',
 832                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 833                                                 $link2
 834                                                 ) . "\n";
 835                                 }
 836
 837                                 $ul = Html::rawElement(
 838                                         'ul',
 839                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 840                                         $li
 841                                         ) . "\n";
 842                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 843                                         $link, $ul )->parse();
 844                         }
 845                         $out->addHTML( Html::rawElement(
 846                                         'li',
 847                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 848                                         $liContents
 849                                 ) . "\n"
 850                         );
 851
 852                 };
 853                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 854                 $res->free();
 855
 856                 // Add a links to [[Special:Whatlinkshere]]
 857                 if ( $count > $limit ) {
 858                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 859                 }
 860                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 861         }
 862
 863         protected function imageDupes() {
 864                 $this->loadFile();
 865                 $out = $this->getContext()->getOutput();
 866
 867                 $dupes = $this->mPage->getDuplicates();
 868                 if ( count( $dupes ) == 0 ) {
 869                         return;
 870                 }
 871
 872                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 873                 $out->addWikiMsg( 'duplicatesoffile',
 874                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 875                 );
 876                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 877
 878                 /**
 879                  * @var $file File
 880                  */
 881                 foreach ( $dupes as $file ) {
 882                         $fromSrc = '';
 883                         if ( $file->isLocal() ) {
 884                                 $link = Linker::linkKnown( $file->getTitle() );
 885                         } else {
 886                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 887                                         $file->getTitle()->getPrefixedText() );
 888                                 $fromSrc = wfMessage( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 889                         }
 890                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 891                 }
 892                 $out->addHTML( "</ul></div>\n" );
 893         }
 894
 895         /**
 896          * Delete the file, or an earlier version of it
 897          */
 898         public function delete() {
 899                 $file = $this->mPage->getFile();
 900                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 901                         // Standard article deletion
 902                         parent::delete();
 903                         return;
 904                 }
 905
 906                 $deleter = new FileDeleteForm( $file );
 907                 $deleter->execute();
 908         }
 909
 910         /**
 911          * Display an error with a wikitext description
 912          *
 913          * @param $description String
 914          */
 915         function showError( $description ) {
 916                 $out = $this->getContext()->getOutput();
 917                 $out->setPageTitle( wfMessage( 'internalerror' ) );
 918                 $out->setRobotPolicy( 'noindex,nofollow' );
 919                 $out->setArticleRelated( false );
 920                 $out->enableClientCache( false );
 921                 $out->addWikiText( $description );
 922         }
 923
 924         /**
 925          * Callback for usort() to do link sorts by (namespace, title)
 926          * Function copied from Title::compare()
 927          *
 928          * @param $a object page to compare with
 929          * @param $b object page to compare with
 930          * @return Integer: result of string comparison, or namespace comparison
 931          */
 932         protected function compare( $a, $b ) {
 933                 if ( $a->page_namespace == $b->page_namespace ) {
 934                         return strcmp( $a->page_title, $b->page_title );
 935                 } else {
 936                         return $a->page_namespace - $b->page_namespace;
 937                 }
 938         }
 939
 940         /**
 941          * Returns the corresponding $wgImageLimits entry for the selected user option
 942          *
 943          * @param $user User
 944          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 945          * @return array
 946          * @since 1.21
 947          */
 948         public function getImageLimitsFromOption( $user, $optionName ) {
 949                 global $wgImageLimits;
 950
 951                 $option = $user->getIntOption( $optionName );
 952                 if ( !isset( $wgImageLimits[$option] ) ) {
 953                         $option = User::getDefaultOption( $optionName );
 954                 }
 955
 956                 // The user offset might still be incorrect, specially if
 957                 // $wgImageLimits got changed (see bug #8858).
 958                 if ( !isset( $wgImageLimits[$option] ) ) {
 959                         // Default to the first offset in $wgImageLimits
 960                         $option = 0;
 961                 }
 962
 963                 return isset( $wgImageLimits[$option] )
 964                         ? $wgImageLimits[$option]
 965                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
 966         }
 967
 968         /**
 969          * Output a drop-down box for language options for the file
 970          *
 971          * @param Array $langChoices Array of string language codes
 972          * @param String $curLang Language code file is being viewed in.
 973          * @param String $defaultLang Language code that image is rendered in by default
 974          * @return String HTML to insert underneath image.
 975          */
 976         protected function doRenderLangOpt( array $langChoices, $curLang, $defaultLang ) {
 977                 global $wgScript;
 978                 sort( $langChoices );
 979                 $curLang = wfBCP47( $curLang );
 980                 $defaultLang = wfBCP47( $defaultLang );
 981                 $opts = '';
 982                 $haveCurrentLang = false;
 983                 $haveDefaultLang = false;
 984
 985                 // We make a list of all the language choices in the file.
 986                 // Additionally if the default language to render this file
 987                 // is not included as being in this file (for example, in svgs
 988                 // usually the fallback content is the english content) also
 989                 // include a choice for that. Last of all, if we're viewing
 990                 // the file in a language not on the list, add it as a choice.
 991                 foreach ( $langChoices as $lang ) {
 992                         $code = wfBCP47( $lang );
 993                         $name = Language::fetchLanguageName( $code, $this->getContext()->getLanguage()->getCode() );
 994                         if ( $name !== '' ) {
 995                                 $display = wfMessage( 'img-lang-opt', $code, $name )->text();
 996                         } else {
 997                                 $display = $code;
 998                         }
 999                         $opts .= "\n" . Xml::option( $display, $code, $curLang === $code );
1000                         if ( $curLang === $code ) {
1001                                 $haveCurrentLang = true;
1002                         }
1003                         if ( $defaultLang === $code ) {
1004                                 $haveDefaultLang = true;
1005                         }
1006                 }
1007                 if ( !$haveDefaultLang ) {
1008                         // Its hard to know if the content is really in the default language, or
1009                         // if its just unmarked content that could be in any language.
1010                         $opts = Xml::option( wfMessage( 'img-lang-default' )->text(), $defaultLang, $defaultLang === $curLang ) . $opts;
1011                 }
1012                 if ( !$haveCurrentLang && $defaultLang !== $curLang ) {
1013                         $name = Language::fetchLanguageName( $curLang, $this->getContext()->getLanguage()->getCode() );
1014                         if ( $name !== '' ) {
1015                                 $display = wfMessage( 'img-lang-opt', $curLang, $name )->text();
1016                         } else {
1017                                 $display = $curLang;
1018                         }
1019                         $opts = Xml::option( $display, $curLang, true ) . $opts;
1020                 }
1021
1022                 $select = Html::rawElement( 'select', array( 'id' => 'mw-imglangselector', 'name' => 'lang' ), $opts );
1023                 $submit = Xml::submitButton( wfMessage( 'img-lang-go' )->text() );
1024
1025                 $formContents = wfMessage( 'img-lang-info' )->rawParams( $select, $submit )->parse()
1026                         . Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() );
1027
1028                 $langSelectLine = Html::rawElement( 'div', array( 'id' => 'mw-imglangselector-line' ),
1029                         Html::rawElement( 'form', array( 'action' => $wgScript ), $formContents )
1030                 );
1031                 return $langSelectLine;
1032         }
1033 }
1034
1035 /**
1036  * Builds the image revision log shown on image pages
1037  *
1038  * @ingroup Media
1039  */
1040 class ImageHistoryList extends ContextSource {
1041
1042         /**
1043          * @var Title
1044          */
1045         protected $title;
1046
1047         /**
1048          * @var File
1049          */
1050         protected $img;
1051
1052         /**
1053          * @var ImagePage
1054          */
1055         protected $imagePage;
1056
1057         /**
1058          * @var File
1059          */
1060         protected $current;
1061
1062         protected $repo, $showThumb;
1063         protected $preventClickjacking = false;
1064
1065         /**
1066          * @param ImagePage $imagePage
1067          */
1068         public function __construct( $imagePage ) {
1069                 global $wgShowArchiveThumbnails;
1070                 $this->current = $imagePage->getFile();
1071                 $this->img = $imagePage->getDisplayedFile();
1072                 $this->title = $imagePage->getTitle();
1073                 $this->imagePage = $imagePage;
1074                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
1075                 $this->setContext( $imagePage->getContext() );
1076         }
1077
1078         /**
1079          * @return ImagePage
1080          */
1081         public function getImagePage() {
1082                 return $this->imagePage;
1083         }
1084
1085         /**
1086          * @return File
1087          */
1088         public function getFile() {
1089                 return $this->img;
1090         }
1091
1092         /**
1093          * @param $navLinks string
1094          * @return string
1095          */
1096         public function beginImageHistoryList( $navLinks = '' ) {
1097                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() ) . "\n"
1098                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1099                         . $this->msg( 'filehist-help' )->parseAsBlock()
1100                         . $navLinks . "\n"
1101                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1102                         . '<tr><td></td>'
1103                         . ( $this->current->isLocal() && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
1104                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1105                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1106                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1107                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1108                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1109                         . "</tr>\n";
1110         }
1111
1112         /**
1113          * @param $navLinks string
1114          * @return string
1115          */
1116         public function endImageHistoryList( $navLinks = '' ) {
1117                 return "</table>\n$navLinks\n</div>\n";
1118         }
1119
1120         /**
1121          * @param $iscur
1122          * @param $file File
1123          * @return string
1124          */
1125         public function imageHistoryLine( $iscur, $file ) {
1126                 global $wgContLang;
1127
1128                 $user = $this->getUser();
1129                 $lang = $this->getLanguage();
1130                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1131                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1132                 $userId = $file->getUser( 'id' );
1133                 $userText = $file->getUser( 'text' );
1134                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1135
1136                 $local = $this->current->isLocal();
1137                 $row = $selected = '';
1138
1139                 // Deletion link
1140                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1141                         $row .= '<td>';
1142                         # Link to remove from history
1143                         if ( $user->isAllowed( 'delete' ) ) {
1144                                 $q = array( 'action' => 'delete' );
1145                                 if ( !$iscur ) {
1146                                         $q['oldimage'] = $img;
1147                                 }
1148                                 $row .= Linker::linkKnown(
1149                                         $this->title,
1150                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1151                                         array(), $q
1152                                 );
1153                         }
1154                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1155                         $canHide = $user->isAllowed( 'deleterevision' );
1156                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1157                                 if ( $user->isAllowed( 'delete' ) ) {
1158                                         $row .= '<br />';
1159                                 }
1160                                 // If file is top revision or locked from this user, don't link
1161                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1162                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1163                                 } else {
1164                                         list( $ts, ) = explode( '!', $img, 2 );
1165                                         $query = array(
1166                                                 'type' => 'oldimage',
1167                                                 'target' => $this->title->getPrefixedText(),
1168                                                 'ids' => $ts,
1169                                         );
1170                                         $del = Linker::revDeleteLink( $query,
1171                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1172                                 }
1173                                 $row .= $del;
1174                         }
1175                         $row .= '</td>';
1176                 }
1177
1178                 // Reversion link/current indicator
1179                 $row .= '<td>';
1180                 if ( $iscur ) {
1181                         $row .= $this->msg( 'filehist-current' )->escaped();
1182                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1183                         && $this->title->quickUserCan( 'upload', $user )
1184                 ) {
1185                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1186                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1187                         } else {
1188                                 $row .= Linker::linkKnown(
1189                                         $this->title,
1190                                         $this->msg( 'filehist-revert' )->escaped(),
1191                                         array(),
1192                                         array(
1193                                                 'action' => 'revert',
1194                                                 'oldimage' => $img,
1195                                                 'wpEditToken' => $user->getEditToken( $img )
1196                                         )
1197                                 );
1198                         }
1199                 }
1200                 $row .= '</td>';
1201
1202                 // Date/time and image link
1203                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1204                         $selected = "class='filehistory-selected'";
1205                 }
1206                 $row .= "<td $selected style='white-space: nowrap;'>";
1207                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1208                         # Don't link to unviewable files
1209                         $row .= '<span class="history-deleted">' . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1210                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1211                         if ( $local ) {
1212                                 $this->preventClickjacking();
1213                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1214                                 # Make a link to review the image
1215                                 $url = Linker::linkKnown(
1216                                         $revdel,
1217                                         $lang->userTimeAndDate( $timestamp, $user ),
1218                                         array(),
1219                                         array(
1220                                                 'target' => $this->title->getPrefixedText(),
1221                                                 'file' => $img,
1222                                                 'token' => $user->getEditToken( $img )
1223                                         )
1224                                 );
1225                         } else {
1226                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1227                         }
1228                         $row .= '<span class="history-deleted">' . $url . '</span>';
1229                 } else {
1230                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1231                         $row .= Xml::element( 'a', array( 'href' => $url ), $lang->userTimeAndDate( $timestamp, $user ) );
1232                 }
1233                 $row .= "</td>";
1234
1235                 // Thumbnail
1236                 if ( $this->showThumb ) {
1237                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1238                 }
1239
1240                 // Image dimensions + size
1241                 $row .= '<td>';
1242                 $row .= htmlspecialchars( $file->getDimensionsString() );
1243                 $row .= $this->msg( 'word-separator' )->plain();
1244                 $row .= '<span style="white-space: nowrap;">';
1245                 $row .= $this->msg( 'parentheses' )->rawParams( Linker::formatSize( $file->getSize() ) )->plain();
1246                 $row .= '</span>';
1247                 $row .= '</td>';
1248
1249                 // Uploading user
1250                 $row .= '<td>';
1251                 // Hide deleted usernames
1252                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1253                         $row .= '<span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1254                 } else {
1255                         if ( $local ) {
1256                                 $row .= Linker::userLink( $userId, $userText );
1257                                 $row .= $this->msg( 'word-separator' )->plain();
1258                                 $row .= '<span style="white-space: nowrap;">';
1259                                 $row .= Linker::userToolLinks( $userId, $userText );
1260                                 $row .= '</span>';
1261                         } else {
1262                                 $row .= htmlspecialchars( $userText );
1263                         }
1264                 }
1265                 $row .= '</td>';
1266
1267                 // Don't show deleted descriptions
1268                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1269                         $row .= '<td><span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1270                 } else {
1271                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1272                 }
1273
1274                 $rowClass = null;
1275                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1276                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1277
1278                 return "<tr{$classAttr}>{$row}</tr>\n";
1279         }
1280
1281         /**
1282          * @param $file File
1283          * @return string
1284          */
1285         protected function getThumbForLine( $file ) {
1286                 $lang = $this->getLanguage();
1287                 $user = $this->getUser();
1288                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1289                         && !$file->isDeleted( File::DELETED_FILE )
1290                 ) {
1291                         $params = array(
1292                                 'width' => '120',
1293                                 'height' => '120',
1294                         );
1295                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1296
1297                         $thumbnail = $file->transform( $params );
1298                         $options = array(
1299                                 'alt' => $this->msg( 'filehist-thumbtext',
1300                                         $lang->userTimeAndDate( $timestamp, $user ),
1301                                         $lang->userDate( $timestamp, $user ),
1302                                         $lang->userTime( $timestamp, $user ) )->text(),
1303                                 'file-link' => true,
1304                         );
1305
1306                         if ( !$thumbnail ) {
1307                                 return $this->msg( 'filehist-nothumb' )->escaped();
1308                         }
1309
1310                         return $thumbnail->toHtml( $options );
1311                 } else {
1312                         return $this->msg( 'filehist-nothumb' )->escaped();
1313                 }
1314         }
1315
1316         /**
1317          * @param $enable bool
1318          */
1319         protected function preventClickjacking( $enable = true ) {
1320                 $this->preventClickjacking = $enable;
1321         }
1322
1323         /**
1324          * @return bool
1325          */
1326         public function getPreventClickjacking() {
1327                 return $this->preventClickjacking;
1328         }
1329 }
1330
1331 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1332         protected $preventClickjacking = false;
1333
1334         /**
1335          * @var File
1336          */
1337         protected $mImg;
1338
1339         /**
1340          * @var Title
1341          */
1342         protected $mTitle;
1343
1344         /**
1345          * @param ImagePage $imagePage
1346          */
1347         function __construct( $imagePage ) {
1348                 parent::__construct( $imagePage->getContext() );
1349                 $this->mImagePage = $imagePage;
1350                 $this->mTitle = clone ( $imagePage->getTitle() );
1351                 $this->mTitle->setFragment( '#filehistory' );
1352                 $this->mImg = null;
1353                 $this->mHist = array();
1354                 $this->mRange = array( 0, 0 ); // display range
1355         }
1356
1357         /**
1358          * @return Title
1359          */
1360         function getTitle() {
1361                 return $this->mTitle;
1362         }
1363
1364         function getQueryInfo() {
1365                 return false;
1366         }
1367
1368         /**
1369          * @return string
1370          */
1371         function getIndexField() {
1372                 return '';
1373         }
1374
1375         /**
1376          * @param $row object
1377          * @return string
1378          */
1379         function formatRow( $row ) {
1380                 return '';
1381         }
1382
1383         /**
1384          * @return string
1385          */
1386         function getBody() {
1387                 $s = '';
1388                 $this->doQuery();
1389                 if ( count( $this->mHist ) ) {
1390                         $list = new ImageHistoryList( $this->mImagePage );
1391                         # Generate prev/next links
1392                         $navLink = $this->getNavigationBar();
1393                         $s = $list->beginImageHistoryList( $navLink );
1394                         // Skip rows there just for paging links
1395                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1396                                 $file = $this->mHist[$i];
1397                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1398                         }
1399                         $s .= $list->endImageHistoryList( $navLink );
1400
1401                         if ( $list->getPreventClickjacking() ) {
1402                                 $this->preventClickjacking();
1403                         }
1404                 }
1405                 return $s;
1406         }
1407
1408         function doQuery() {
1409                 if ( $this->mQueryDone ) {
1410                         return;
1411                 }
1412                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1413                 if ( !$this->mImg->exists() ) {
1414                         return;
1415                 }
1416                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1417                 if ( $this->mIsBackwards ) {
1418                         // Fetch the file history
1419                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1420                         // The current rev may not meet the offset/limit
1421                         $numRows = count( $this->mHist );
1422                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1423                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1424                         }
1425                 } else {
1426                         // The current rev may not meet the offset
1427                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1428                                 $this->mHist[] = $this->mImg;
1429                         }
1430                         // Old image versions (fetch extra row for nav links)
1431                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1432                         // Fetch the file history
1433                         $this->mHist = array_merge( $this->mHist,
1434                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1435                 }
1436                 $numRows = count( $this->mHist ); // Total number of query results
1437                 if ( $numRows ) {
1438                         # Index value of top item in the list
1439                         $firstIndex = $this->mIsBackwards ?
1440                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1441                         # Discard the extra result row if there is one
1442                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1443                                 if ( $this->mIsBackwards ) {
1444                                         # Index value of item past the index
1445                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1446                                         # Index value of bottom item in the list
1447                                         $lastIndex = $this->mHist[1]->getTimestamp();
1448                                         # Display range
1449                                         $this->mRange = array( 1, $numRows - 1 );
1450                                 } else {
1451                                         # Index value of item past the index
1452                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1453                                         # Index value of bottom item in the list
1454                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1455                                         # Display range
1456                                         $this->mRange = array( 0, $numRows - 2 );
1457                                 }
1458                         } else {
1459                                 # Setting indexes to an empty string means that they will be
1460                                 # omitted if they would otherwise appear in URLs. It just so
1461                                 # happens that this  is the right thing to do in the standard
1462                                 # UI, in all the relevant cases.
1463                                 $this->mPastTheEndIndex = '';
1464                                 # Index value of bottom item in the list
1465                                 $lastIndex = $this->mIsBackwards ?
1466                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1467                                 # Display range
1468                                 $this->mRange = array( 0, $numRows - 1 );
1469                         }
1470                 } else {
1471                         $firstIndex = '';
1472                         $lastIndex = '';
1473                         $this->mPastTheEndIndex = '';
1474                 }
1475                 if ( $this->mIsBackwards ) {
1476                         $this->mIsFirst = ( $numRows < $queryLimit );
1477                         $this->mIsLast = ( $this->mOffset == '' );
1478                         $this->mLastShown = $firstIndex;
1479                         $this->mFirstShown = $lastIndex;
1480                 } else {
1481                         $this->mIsFirst = ( $this->mOffset == '' );
1482                         $this->mIsLast = ( $numRows < $queryLimit );
1483                         $this->mLastShown = $lastIndex;
1484                         $this->mFirstShown = $firstIndex;
1485                 }
1486                 $this->mQueryDone = true;
1487         }
1488
1489         /**
1490          * @param $enable bool
1491          */
1492         protected function preventClickjacking( $enable = true ) {
1493                 $this->preventClickjacking = $enable;
1494         }
1495
1496         /**
1497          * @return bool
1498          */
1499         public function getPreventClickjacking() {
1500                 return $this->preventClickjacking;
1501         }
1502
1503 }