includes/page/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         /** @var File */
  30         private $displayImg;
  31
  32         /** @var FileRepo */
  33         private $repo;
  34
  35         /** @var bool */
  36         private $fileLoaded;
  37
  38         /** @var bool */
  39         protected $mExtraDescription = false;
  40
  41         /**
  42          * @param Title $title
  43          * @return WikiFilePage
  44          */
  45         protected function newPage( Title $title ) {
  46                 // Overload mPage with a file-specific page
  47                 return new WikiFilePage( $title );
  48         }
  49
  50         /**
  51          * Constructor from a page id
  52          * @param int $id Article ID to load
  53          * @return ImagePage|null
  54          */
  55         public static function newFromID( $id ) {
  56                 $t = Title::newFromID( $id );
  57                 # @todo FIXME: Doesn't inherit right
  58                 return $t == null ? null : new self( $t );
  59                 # return $t == null ? null : new static( $t ); // PHP 5.3
  60         }
  61
  62         /**
  63          * @param File $file
  64          * @return void
  65          */
  66         public function setFile( $file ) {
  67                 $this->mPage->setFile( $file );
  68                 $this->displayImg = $file;
  69                 $this->fileLoaded = true;
  70         }
  71
  72         protected function loadFile() {
  73                 if ( $this->fileLoaded ) {
  74                         return;
  75                 }
  76                 $this->fileLoaded = true;
  77
  78                 $this->displayImg = $img = false;
  79                 Hooks::run( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  80                 if ( !$img ) { // not set by hook?
  81                         $img = wfFindFile( $this->getTitle() );
  82                         if ( !$img ) {
  83                                 $img = wfLocalFile( $this->getTitle() );
  84                         }
  85                 }
  86                 $this->mPage->setFile( $img );
  87                 if ( !$this->displayImg ) { // not set by hook?
  88                         $this->displayImg = $img;
  89                 }
  90                 $this->repo = $img->getRepo();
  91         }
  92
  93         /**
  94          * Handler for action=render
  95          * Include body text only; none of the image extras
  96          */
  97         public function render() {
  98                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
  99                 parent::view();
 100         }
 101
 102         public function view() {
 103                 global $wgShowEXIF;
 104
 105                 $out = $this->getContext()->getOutput();
 106                 $request = $this->getContext()->getRequest();
 107                 $diff = $request->getVal( 'diff' );
 108                 $diffOnly = $request->getBool(
 109                         'diffonly',
 110                         $this->getContext()->getUser()->getOption( 'diffonly' )
 111                 );
 112
 113                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( $diff !== null && $diffOnly ) ) {
 114                         parent::view();
 115                         return;
 116                 }
 117
 118                 $this->loadFile();
 119
 120                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
 121                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || $diff !== null ) {
 122                                 // mTitle is the same as the redirect target so ask Article
 123                                 // to perform the redirect for us.
 124                                 $request->setVal( 'diffonly', 'true' );
 125                                 parent::view();
 126                                 return;
 127                         } else {
 128                                 // mTitle is not the same as the redirect target so it is
 129                                 // probably the redirect page itself. Fake the redirect symbol
 130                                 $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 131                                 $out->addHTML( $this->viewRedirect(
 132                                         Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 133                                         /* $appendSubtitle */ true,
 134                                         /* $forceKnown */ true )
 135                                 );
 136                                 $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 137                                 return;
 138                         }
 139                 }
 140
 141                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 142                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 143                         $formattedMetadata = $this->displayImg->formatMetadata( $this->getContext() );
 144                         $showmeta = $formattedMetadata !== false;
 145                 } else {
 146                         $showmeta = false;
 147                 }
 148
 149                 if ( !$diff && $this->displayImg->exists() ) {
 150                         $out->addHTML( $this->showTOC( $showmeta ) );
 151                 }
 152
 153                 if ( !$diff ) {
 154                         $this->openShowImage();
 155                 }
 156
 157                 # No need to display noarticletext, we use our own message, output in openShowImage()
 158                 if ( $this->mPage->getID() ) {
 159                         # NS_FILE is in the user language, but this section (the actual wikitext)
 160                         # should be in page content language
 161                         $pageLang = $this->getTitle()->getPageViewLanguage();
 162                         $out->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 163                                 'lang' => $pageLang->getHtmlCode(), 'dir' => $pageLang->getDir(),
 164                                 'class' => 'mw-content-' . $pageLang->getDir() ) ) );
 165
 166                         parent::view();
 167
 168                         $out->addHTML( Xml::closeElement( 'div' ) );
 169                 } else {
 170                         # Just need to set the right headers
 171                         $out->setArticleFlag( true );
 172                         $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 173                         $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 174                 }
 175
 176                 # Show shared description, if needed
 177                 if ( $this->mExtraDescription ) {
 178                         $fol = $this->getContext()->msg( 'shareddescriptionfollows' );
 179                         if ( !$fol->isDisabled() ) {
 180                                 $out->addWikiText( $fol->plain() );
 181                         }
 182                         $out->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 183                 }
 184
 185                 $this->closeShowImage();
 186                 $this->imageHistory();
 187                 // TODO: Cleanup the following
 188
 189                 $out->addHTML( Xml::element( 'h2',
 190                         array( 'id' => 'filelinks' ),
 191                                 $this->getContext()->msg( 'imagelinks' )->text() ) . "\n" );
 192                 $this->imageDupes();
 193                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 194                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 195                 $this->imageLinks();
 196
 197                 # Allow extensions to add something after the image links
 198                 $html = '';
 199                 Hooks::run( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 200                 if ( $html ) {
 201                         $out->addHTML( $html );
 202                 }
 203
 204                 if ( $showmeta ) {
 205                         $out->addHTML( Xml::element(
 206                                 'h2',
 207                                 array( 'id' => 'metadata' ),
 208                                         $this->getContext()->msg( 'metadata' )->text() ) . "\n" );
 209                         $out->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 210                         $out->addModules( array( 'mediawiki.action.view.metadata' ) );
 211                 }
 212
 213                 // Add remote Filepage.css
 214                 if ( !$this->repo->isLocal() ) {
 215                         $css = $this->repo->getDescriptionStylesheetUrl();
 216                         if ( $css ) {
 217                                 $out->addStyle( $css );
 218                         }
 219                 }
 220                 // always show the local local Filepage.css, bug 29277
 221                 $out->addModuleStyles( 'filepage' );
 222
 223                 // Add MediaWiki styles for a file page
 224                 $out->addModuleStyles( 'mediawiki.action.view.filepage' );
 225         }
 226
 227         /**
 228          * @return File
 229          */
 230         public function getDisplayedFile() {
 231                 $this->loadFile();
 232                 return $this->displayImg;
 233         }
 234
 235         /**
 236          * Create the TOC
 237          *
 238          * @param bool $metadata Whether or not to show the metadata link
 239          * @return string
 240          */
 241         protected function showTOC( $metadata ) {
 242                 $r = array(
 243                         '<li><a href="#file">' . $this->getContext()->msg( 'file-anchor-link' )->escaped() . '</a></li>',
 244                         '<li><a href="#filehistory">' . $this->getContext()->msg( 'filehist' )->escaped() . '</a></li>',
 245                         '<li><a href="#filelinks">' . $this->getContext()->msg( 'imagelinks' )->escaped() . '</a></li>',
 246                 );
 247
 248                 Hooks::run( 'ImagePageShowTOC', array( $this, &$r ) );
 249
 250                 if ( $metadata ) {
 251                         $r[] = '<li><a href="#metadata">' .
 252                                 $this->getContext()->msg( 'metadata' )->escaped() .
 253                                 '</a></li>';
 254                 }
 255
 256                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 257         }
 258
 259         /**
 260          * Make a table with metadata to be shown in the output page.
 261          *
 262          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 263          *
 264          * @param array $metadata The array containing the Exif data
 265          * @return string The metadata table. This is treated as Wikitext (!)
 266          */
 267         protected function makeMetadataTable( $metadata ) {
 268                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 269                 $r .= $this->getContext()->msg( 'metadata-help' )->plain();
 270                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 271                 foreach ( $metadata as $type => $stuff ) {
 272                         foreach ( $stuff as $v ) {
 273                                 # @todo FIXME: Why is this using escapeId for a class?!
 274                                 $class = Sanitizer::escapeId( $v['id'] );
 275                                 if ( $type == 'collapsed' ) {
 276                                         // Handled by mediawiki.action.view.metadata module.
 277                                         $class .= ' collapsable';
 278                                 }
 279                                 $r .= "<tr class=\"$class\">\n";
 280                                 $r .= "<th>{$v['name']}</th>\n";
 281                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 282                         }
 283                 }
 284                 $r .= "</table>\n</div>\n";
 285                 return $r;
 286         }
 287
 288         /**
 289          * Overloading Article's getContentObject method.
 290          *
 291          * Omit noarticletext if sharedupload; text will be fetched from the
 292          * shared upload server if possible.
 293          * @return string
 294          */
 295         public function getContentObject() {
 296                 $this->loadFile();
 297                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 298                         return null;
 299                 }
 300                 return parent::getContentObject();
 301         }
 302
 303         protected function openShowImage() {
 304                 global $wgEnableUploads, $wgSend404Code, $wgSVGMaxSize;
 305
 306                 $this->loadFile();
 307                 $out = $this->getContext()->getOutput();
 308                 $user = $this->getContext()->getUser();
 309                 $lang = $this->getContext()->getLanguage();
 310                 $dirmark = $lang->getDirMarkEntity();
 311                 $request = $this->getContext()->getRequest();
 312
 313                 $max = $this->getImageLimitsFromOption( $user, 'imagesize' );
 314                 $maxWidth = $max[0];
 315                 $maxHeight = $max[1];
 316
 317                 if ( $this->displayImg->exists() ) {
 318                         # image
 319                         $page = $request->getIntOrNull( 'page' );
 320                         if ( is_null( $page ) ) {
 321                                 $params = array();
 322                                 $page = 1;
 323                         } else {
 324                                 $params = array( 'page' => $page );
 325                         }
 326
 327                         $renderLang = $request->getVal( 'lang' );
 328                         if ( !is_null( $renderLang ) ) {
 329                                 $handler = $this->displayImg->getHandler();
 330                                 if ( $handler && $handler->validateParam( 'lang', $renderLang ) ) {
 331                                         $params['lang'] = $renderLang;
 332                                 } else {
 333                                         $renderLang = null;
 334                                 }
 335                         }
 336
 337                         $width_orig = $this->displayImg->getWidth( $page );
 338                         $width = $width_orig;
 339                         $height_orig = $this->displayImg->getHeight( $page );
 340                         $height = $height_orig;
 341
 342                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 343                         $linktext = $filename;
 344
 345                         Hooks::run( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 346
 347                         if ( $this->displayImg->allowInlineDisplay() ) {
 348                                 # image
 349                                 # "Download high res version" link below the image
 350                                 # $msgsize = $this->getContext()->msg( 'file-info-size', $width_orig, $height_orig,
 351                                 #   Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 352                                 # We'll show a thumbnail of this image
 353                                 if ( $width > $maxWidth || $height > $maxHeight || $this->displayImg->isVectorized() ) {
 354                                         list( $width, $height ) = $this->getDisplayWidthHeight(
 355                                                 $maxWidth, $maxHeight, $width, $height
 356                                         );
 357                                         $linktext = $this->getContext()->msg( 'show-big-image' )->escaped();
 358
 359                                         $thumbSizes = $this->getThumbSizes( $width_orig, $height_orig );
 360                                         # Generate thumbnails or thumbnail links as needed...
 361                                         $otherSizes = array();
 362                                         foreach ( $thumbSizes as $size ) {
 363                                                 // We include a thumbnail size in the list, if it is
 364                                                 // less than or equal to the original size of the image
 365                                                 // asset ($width_orig/$height_orig). We also exclude
 366                                                 // the current thumbnail's size ($width/$height)
 367                                                 // since that is added to the message separately, so
 368                                                 // it can be denoted as the current size being shown.
 369                                                 // Vectorized images are limited by $wgSVGMaxSize big,
 370                                                 // so all thumbs less than or equal that are shown.
 371                                                 if ( ( ( $size[0] <= $width_orig && $size[1] <= $height_orig )
 372                                                                 || ( $this->displayImg->isVectorized()
 373                                                                         && max( $size[0], $size[1] ) <= $wgSVGMaxSize )
 374                                                         )
 375                                                         && $size[0] != $width && $size[1] != $height
 376                                                 ) {
 377                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 378                                                         if ( $sizeLink ) {
 379                                                                 $otherSizes[] = $sizeLink;
 380                                                         }
 381                                                 }
 382                                         }
 383                                         $otherSizes = array_unique( $otherSizes );
 384
 385                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 386                                         $msgsmall = $this->getThumbPrevText( $params, $sizeLinkBigImagePreview );
 387                                         if ( count( $otherSizes ) ) {
 388                                                 $msgsmall .= ' ' .
 389                                                 Html::rawElement(
 390                                                         'span',
 391                                                         array( 'class' => 'mw-filepage-other-resolutions' ),
 392                                                         $this->getContext()->msg( 'show-big-image-other' )
 393                                                                 ->rawParams( $lang->pipeList( $otherSizes ) )
 394                                                                 ->params( count( $otherSizes ) )
 395                                                                 ->parse()
 396                                                 );
 397                                         }
 398                                 } elseif ( $width == 0 && $height == 0 ) {
 399                                         # Some sort of audio file that doesn't have dimensions
 400                                         # Don't output a no hi res message for such a file
 401                                         $msgsmall = '';
 402                                 } else {
 403                                         # Image is small enough to show full size on image page
 404                                         $msgsmall = $this->getContext()->msg( 'file-nohires' )->parse();
 405                                 }
 406
 407                                 $params['width'] = $width;
 408                                 $params['height'] = $height;
 409                                 $thumbnail = $this->displayImg->transform( $params );
 410                                 Linker::processResponsiveImages( $this->displayImg, $thumbnail, $params );
 411
 412                                 $anchorclose = Html::rawElement(
 413                                         'div',
 414                                         array( 'class' => 'mw-filepage-resolutioninfo' ),
 415                                         $msgsmall
 416                                 );
 417
 418                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 419                                 if ( $isMulti ) {
 420                                         $out->addModules( 'mediawiki.page.image.pagination' );
 421                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 422                                 }
 423
 424                                 if ( $thumbnail ) {
 425                                         $options = array(
 426                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 427                                                 'file-link' => true,
 428                                         );
 429                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 430                                                 $thumbnail->toHtml( $options ) .
 431                                                 $anchorclose . "</div>\n" );
 432                                 }
 433
 434                                 if ( $isMulti ) {
 435                                         $count = $this->displayImg->pageCount();
 436
 437                                         if ( $page > 1 ) {
 438                                                 $label = $out->parse( $this->getContext()->msg( 'imgmultipageprev' )->text(), false );
 439                                                 // on the client side, this link is generated in ajaxifyPageNavigation()
 440                                                 // in the mediawiki.page.image.pagination module
 441                                                 $link = Linker::linkKnown(
 442                                                         $this->getTitle(),
 443                                                         $label,
 444                                                         array(),
 445                                                         array( 'page' => $page - 1 )
 446                                                 );
 447                                                 $thumb1 = Linker::makeThumbLinkObj(
 448                                                         $this->getTitle(),
 449                                                         $this->displayImg,
 450                                                         $link,
 451                                                         $label,
 452                                                         'none',
 453                                                         array( 'page' => $page - 1 )
 454                                                 );
 455                                         } else {
 456                                                 $thumb1 = '';
 457                                         }
 458
 459                                         if ( $page < $count ) {
 460                                                 $label = $this->getContext()->msg( 'imgmultipagenext' )->text();
 461                                                 $link = Linker::linkKnown(
 462                                                         $this->getTitle(),
 463                                                         $label,
 464                                                         array(),
 465                                                         array( 'page' => $page + 1 )
 466                                                 );
 467                                                 $thumb2 = Linker::makeThumbLinkObj(
 468                                                         $this->getTitle(),
 469                                                         $this->displayImg,
 470                                                         $link,
 471                                                         $label,
 472                                                         'none',
 473                                                         array( 'page' => $page + 1 )
 474                                                 );
 475                                         } else {
 476                                                 $thumb2 = '';
 477                                         }
 478
 479                                         global $wgScript;
 480
 481                                         $formParams = array(
 482                                                 'name' => 'pageselector',
 483                                                 'action' => $wgScript,
 484                                         );
 485                                         $options = array();
 486                                         for ( $i = 1; $i <= $count; $i++ ) {
 487                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 488                                         }
 489                                         $select = Xml::tags( 'select',
 490                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 491                                                 implode( "\n", $options ) );
 492
 493                                         $out->addHTML(
 494                                                 '</td><td><div class="multipageimagenavbox">' .
 495                                                 Xml::openElement( 'form', $formParams ) .
 496                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 497                                                 $this->getContext()->msg( 'imgmultigoto' )->rawParams( $select )->parse() .
 498                                                 Xml::submitButton( $this->getContext()->msg( 'imgmultigo' )->text() ) .
 499                                                 Xml::closeElement( 'form' ) .
 500                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 501                                         );
 502                                 }
 503                         } elseif ( $this->displayImg->isSafeFile() ) {
 504                                 # if direct link is allowed but it's not a renderable image, show an icon.
 505                                 $icon = $this->displayImg->iconThumb();
 506
 507                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 508                                         $icon->toHtml( array( 'file-link' => true ) ) .
 509                                         "</div>\n" );
 510                         }
 511
 512                         $longDesc = $this->getContext()->msg( 'parentheses', $this->displayImg->getLongDesc() )->text();
 513
 514                         $handler = $this->displayImg->getHandler();
 515
 516                         // If this is a filetype with potential issues, warn the user.
 517                         if ( $handler ) {
 518                                 $warningConfig = $handler->getWarningConfig( $this->displayImg );
 519
 520                                 if ( $warningConfig !== null ) {
 521                                         // The warning will be displayed via CSS and JavaScript.
 522                                         // We just need to tell the client side what message to use.
 523                                         $output = $this->getContext()->getOutput();
 524                                         $output->addJsConfigVars( 'wgFileWarning', $warningConfig );
 525                                         $output->addModules( $warningConfig['module'] );
 526                                         $output->addModules( 'mediawiki.filewarning' );
 527                                 }
 528                         }
 529
 530                         $medialink = "[[Media:$filename|$linktext]]";
 531
 532                         if ( !$this->displayImg->isSafeFile() ) {
 533                                 $warning = $this->getContext()->msg( 'mediawarning' )->plain();
 534                                 // dirmark is needed here to separate the file name, which
 535                                 // most likely ends in Latin characters, from the description,
 536                                 // which may begin with the file type. In RTL environment
 537                                 // this will get messy.
 538                                 // The dirmark, however, must not be immediately adjacent
 539                                 // to the filename, because it can get copied with it.
 540                                 // See bug 25277.
 541                                 // @codingStandardsIgnoreStart Ignore long line
 542                                 $out->addWikiText( <<<EOT
 543 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 544 <div class="mediaWarning">$warning</div>
 545 EOT
 546                                 );
 547                                 // @codingStandardsIgnoreEnd
 548                         } else {
 549                                 $out->addWikiText( <<<EOT
 550 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 551 </div>
 552 EOT
 553                                 );
 554                         }
 555
 556                         $renderLangOptions = $this->displayImg->getAvailableLanguages();
 557                         if ( count( $renderLangOptions ) >= 1 ) {
 558                                 $currentLanguage = $renderLang;
 559                                 $defaultLang = $this->displayImg->getDefaultRenderLanguage();
 560                                 if ( is_null( $currentLanguage ) ) {
 561                                         $currentLanguage = $defaultLang;
 562                                 }
 563                                 $out->addHtml( $this->doRenderLangOpt( $renderLangOptions, $currentLanguage, $defaultLang ) );
 564                         }
 565
 566                         // Add cannot animate thumbnail warning
 567                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 568                                 // Include the extension so wiki admins can
 569                                 // customize it on a per file-type basis
 570                                 // (aka say things like use format X instead).
 571                                 // additionally have a specific message for
 572                                 // file-no-thumb-animation-gif
 573                                 $ext = $this->displayImg->getExtension();
 574                                 $noAnimMesg = wfMessageFallback(
 575                                         'file-no-thumb-animation-' . $ext,
 576                                         'file-no-thumb-animation'
 577                                 )->plain();
 578
 579                                 $out->addWikiText( <<<EOT
 580 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 581 EOT
 582                                 );
 583                         }
 584
 585                         if ( !$this->displayImg->isLocal() ) {
 586                                 $this->printSharedImageText();
 587                         }
 588                 } else {
 589                         # Image does not exist
 590                         if ( !$this->getID() ) {
 591                                 # No article exists either
 592                                 # Show deletion log to be consistent with normal articles
 593                                 LogEventsList::showLogExtract(
 594                                         $out,
 595                                         array( 'delete', 'move' ),
 596                                         $this->getTitle()->getPrefixedText(),
 597                                         '',
 598                                         array( 'lim' => 10,
 599                                                 'conds' => array( "log_action != 'revision'" ),
 600                                                 'showIfEmpty' => false,
 601                                                 'msgKey' => array( 'moveddeleted-notice' )
 602                                         )
 603                                 );
 604                         }
 605
 606                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 607                                 // Only show an upload link if the user can upload
 608                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 609                                 $nofile = array(
 610                                         'filepage-nofile-link',
 611                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 612                                 );
 613                         } else {
 614                                 $nofile = 'filepage-nofile';
 615                         }
 616                         // Note, if there is an image description page, but
 617                         // no image, then this setRobotPolicy is overridden
 618                         // by Article::View().
 619                         $out->setRobotPolicy( 'noindex,nofollow' );
 620                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 621                         if ( !$this->getID() && $wgSend404Code ) {
 622                                 // If there is no image, no shared image, and no description page,
 623                                 // output a 404, to be consistent with Article::showMissingArticle.
 624                                 $request->response()->statusHeader( 404 );
 625                         }
 626                 }
 627                 $out->setFileVersion( $this->displayImg );
 628         }
 629
 630         /**
 631          * Make the text under the image to say what size preview
 632          *
 633          * @param $params Array parameters for thumbnail
 634          * @param $sizeLinkBigImagePreview HTML for the current size
 635          * @return string HTML output
 636          */
 637         private function getThumbPrevText( $params, $sizeLinkBigImagePreview ) {
 638                 if ( $sizeLinkBigImagePreview ) {
 639                         // Show a different message of preview is different format from original.
 640                         $previewTypeDiffers = false;
 641                         $origExt = $thumbExt = $this->displayImg->getExtension();
 642                         if ( $this->displayImg->getHandler() ) {
 643                                 $origMime = $this->displayImg->getMimeType();
 644                                 $typeParams = $params;
 645                                 $this->displayImg->getHandler()->normaliseParams( $this->displayImg, $typeParams );
 646                                 list( $thumbExt, $thumbMime ) = $this->displayImg->getHandler()->getThumbType(
 647                                         $origExt, $origMime, $typeParams );
 648                                 if ( $thumbMime !== $origMime ) {
 649                                         $previewTypeDiffers = true;
 650                                 }
 651                         }
 652                         if ( $previewTypeDiffers ) {
 653                                 return $this->getContext()->msg( 'show-big-image-preview-differ' )->
 654                                         rawParams( $sizeLinkBigImagePreview )->
 655                                         params( strtoupper( $origExt ) )->
 656                                         params( strtoupper( $thumbExt ) )->
 657                                         parse();
 658                         } else {
 659                                 return $this->getContext()->msg( 'show-big-image-preview' )->
 660                                         rawParams( $sizeLinkBigImagePreview )->
 661                                 parse();
 662                         }
 663                 } else {
 664                         return '';
 665                 }
 666         }
 667
 668         /**
 669          * Creates an thumbnail of specified size and returns an HTML link to it
 670          * @param array $params Scaler parameters
 671          * @param int $width
 672          * @param int $height
 673          * @return string
 674          */
 675         private function makeSizeLink( $params, $width, $height ) {
 676                 $params['width'] = $width;
 677                 $params['height'] = $height;
 678                 $thumbnail = $this->displayImg->transform( $params );
 679                 if ( $thumbnail && !$thumbnail->isError() ) {
 680                         return Html::rawElement( 'a', array(
 681                                 'href' => $thumbnail->getUrl(),
 682                                 'class' => 'mw-thumbnail-link'
 683                                 ), $this->getContext()->msg( 'show-big-image-size' )->numParams(
 684                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 685                                 )->parse() );
 686                 } else {
 687                         return '';
 688                 }
 689         }
 690
 691         /**
 692          * Show a notice that the file is from a shared repository
 693          */
 694         protected function printSharedImageText() {
 695                 $out = $this->getContext()->getOutput();
 696                 $this->loadFile();
 697
 698                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 699                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 700
 701                 /* Add canonical to head if there is no local page for this shared file */
 702                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 703                         $out->setCanonicalUrl( $descUrl );
 704                 }
 705
 706                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 707                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 708
 709                 if ( $descUrl &&
 710                         $descText &&
 711                         $this->getContext()->msg( 'sharedupload-desc-here' )->plain() !== '-'
 712                 ) {
 713                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 714                 } elseif ( $descUrl &&
 715                         $this->getContext()->msg( 'sharedupload-desc-there' )->plain() !== '-'
 716                 ) {
 717                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 718                 } else {
 719                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 720                 }
 721
 722                 if ( $descText ) {
 723                         $this->mExtraDescription = $descText;
 724                 }
 725         }
 726
 727         public function getUploadUrl() {
 728                 $this->loadFile();
 729                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 730                 return $uploadTitle->getFullURL( array(
 731                         'wpDestFile' => $this->mPage->getFile()->getName(),
 732                         'wpForReUpload' => 1
 733                 ) );
 734         }
 735
 736         /**
 737          * Print out the various links at the bottom of the image page, e.g. reupload,
 738          * external editing (and instructions link) etc.
 739          */
 740         protected function uploadLinksBox() {
 741                 global $wgEnableUploads;
 742
 743                 if ( !$wgEnableUploads ) {
 744                         return;
 745                 }
 746
 747                 $this->loadFile();
 748                 if ( !$this->mPage->getFile()->isLocal() ) {
 749                         return;
 750                 }
 751
 752                 $out = $this->getContext()->getOutput();
 753                 $out->addHTML( "<ul>\n" );
 754
 755                 # "Upload a new version of this file" link
 756                 $canUpload = $this->getTitle()->quickUserCan( 'upload', $this->getContext()->getUser() );
 757                 if ( $canUpload && UploadBase::userCanReUpload(
 758                                 $this->getContext()->getUser(),
 759                                 $this->mPage->getFile() )
 760                 ) {
 761                         $ulink = Linker::makeExternalLink(
 762                                 $this->getUploadUrl(),
 763                                 $this->getContext()->msg( 'uploadnewversion-linktext' )->text()
 764                         );
 765                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\">"
 766                                 . "<div class=\"plainlinks\">{$ulink}</div></li>\n" );
 767                 } else {
 768                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">"
 769                                 . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 770                 }
 771
 772                 $out->addHTML( "</ul>\n" );
 773         }
 774
 775         /**
 776          * For overloading
 777          */
 778         protected function closeShowImage() {
 779         }
 780
 781         /**
 782          * If the page we've just displayed is in the "Image" namespace,
 783          * we follow it with an upload history of the image and its usage.
 784          */
 785         protected function imageHistory() {
 786                 $this->loadFile();
 787                 $out = $this->getContext()->getOutput();
 788                 $pager = new ImageHistoryPseudoPager( $this );
 789                 $out->addHTML( $pager->getBody() );
 790                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 791
 792                 $this->mPage->getFile()->resetHistory(); // free db resources
 793
 794                 # Exist check because we don't want to show this on pages where an image
 795                 # doesn't exist along with the noimage message, that would suck. -ævar
 796                 if ( $this->mPage->getFile()->exists() ) {
 797                         $this->uploadLinksBox();
 798                 }
 799         }
 800
 801         /**
 802          * @param string $target
 803          * @param int $limit
 804          * @return ResultWrapper
 805          */
 806         protected function queryImageLinks( $target, $limit ) {
 807                 $dbr = wfGetDB( DB_SLAVE );
 808
 809                 return $dbr->select(
 810                         array( 'imagelinks', 'page' ),
 811                         array( 'page_namespace', 'page_title', 'il_to' ),
 812                         array( 'il_to' => $target, 'il_from = page_id' ),
 813                         __METHOD__,
 814                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 815                 );
 816         }
 817
 818         protected function imageLinks() {
 819                 $limit = 100;
 820
 821                 $out = $this->getContext()->getOutput();
 822
 823                 $rows = array();
 824                 $redirects = array();
 825                 foreach ( $this->getTitle()->getRedirectsHere( NS_FILE ) as $redir ) {
 826                         $redirects[$redir->getDBkey()] = array();
 827                         $rows[] = (object)array(
 828                                 'page_namespace' => NS_FILE,
 829                                 'page_title' => $redir->getDBkey(),
 830                         );
 831                 }
 832
 833                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 834                 foreach ( $res as $row ) {
 835                         $rows[] = $row;
 836                 }
 837                 $count = count( $rows );
 838
 839                 $hasMore = $count > $limit;
 840                 if ( !$hasMore && count( $redirects ) ) {
 841                         $res = $this->queryImageLinks( array_keys( $redirects ),
 842                                 $limit - count( $rows ) + 1 );
 843                         foreach ( $res as $row ) {
 844                                 $redirects[$row->il_to][] = $row;
 845                                 $count++;
 846                         }
 847                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 848                 }
 849
 850                 if ( $count == 0 ) {
 851                         $out->wrapWikiMsg(
 852                                 Html::rawElement( 'div',
 853                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 854                                 'nolinkstoimage'
 855                         );
 856                         return;
 857                 }
 858
 859                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 860                 if ( !$hasMore ) {
 861                         $out->addWikiMsg( 'linkstoimage', $count );
 862                 } else {
 863                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 864                         $out->addWikiMsg( 'linkstoimage-more',
 865                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 866                                 $this->getTitle()->getPrefixedDBkey()
 867                         );
 868                 }
 869
 870                 $out->addHTML(
 871                         Html::openElement( 'ul',
 872                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 873                 );
 874                 $count = 0;
 875
 876                 // Sort the list by namespace:title
 877                 usort( $rows, array( $this, 'compare' ) );
 878
 879                 // Create links for every element
 880                 $currentCount = 0;
 881                 foreach ( $rows as $element ) {
 882                         $currentCount++;
 883                         if ( $currentCount > $limit ) {
 884                                 break;
 885                         }
 886
 887                         $query = array();
 888                         # Add a redirect=no to make redirect pages reachable
 889                         if ( isset( $redirects[$element->page_title] ) ) {
 890                                 $query['redirect'] = 'no';
 891                         }
 892                         $link = Linker::linkKnown(
 893                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 894                                 null, array(), $query
 895                         );
 896                         if ( !isset( $redirects[$element->page_title] ) ) {
 897                                 # No redirects
 898                                 $liContents = $link;
 899                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 900                                 # Redirect without usages
 901                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )
 902                                         ->rawParams( $link, '' )
 903                                         ->parse();
 904                         } else {
 905                                 # Redirect with usages
 906                                 $li = '';
 907                                 foreach ( $redirects[$element->page_title] as $row ) {
 908                                         $currentCount++;
 909                                         if ( $currentCount > $limit ) {
 910                                                 break;
 911                                         }
 912
 913                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 914                                         $li .= Html::rawElement(
 915                                                 'li',
 916                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 917                                                 $link2
 918                                                 ) . "\n";
 919                                 }
 920
 921                                 $ul = Html::rawElement(
 922                                         'ul',
 923                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 924                                         $li
 925                                         ) . "\n";
 926                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )->rawParams(
 927                                         $link, $ul )->parse();
 928                         }
 929                         $out->addHTML( Html::rawElement(
 930                                         'li',
 931                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 932                                         $liContents
 933                                 ) . "\n"
 934                         );
 935
 936                 };
 937                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 938                 $res->free();
 939
 940                 // Add a links to [[Special:Whatlinkshere]]
 941                 if ( $count > $limit ) {
 942                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 943                 }
 944                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 945         }
 946
 947         protected function imageDupes() {
 948                 $this->loadFile();
 949                 $out = $this->getContext()->getOutput();
 950
 951                 $dupes = $this->mPage->getDuplicates();
 952                 if ( count( $dupes ) == 0 ) {
 953                         return;
 954                 }
 955
 956                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 957                 $out->addWikiMsg( 'duplicatesoffile',
 958                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 959                 );
 960                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 961
 962                 /**
 963                  * @var $file File
 964                  */
 965                 foreach ( $dupes as $file ) {
 966                         $fromSrc = '';
 967                         if ( $file->isLocal() ) {
 968                                 $link = Linker::linkKnown( $file->getTitle() );
 969                         } else {
 970                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 971                                         $file->getTitle()->getPrefixedText() );
 972                                 $fromSrc = $this->getContext()->msg(
 973                                         'shared-repo-from',
 974                                         $file->getRepo()->getDisplayName()
 975                                 )->text();
 976                         }
 977                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 978                 }
 979                 $out->addHTML( "</ul></div>\n" );
 980         }
 981
 982         /**
 983          * Delete the file, or an earlier version of it
 984          */
 985         public function delete() {
 986                 $file = $this->mPage->getFile();
 987                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 988                         // Standard article deletion
 989                         parent::delete();
 990                         return;
 991                 }
 992
 993                 $deleter = new FileDeleteForm( $file );
 994                 $deleter->execute();
 995         }
 996
 997         /**
 998          * Display an error with a wikitext description
 999          *
1000          * @param string $description
1001          */
1002         function showError( $description ) {
1003                 $out = $this->getContext()->getOutput();
1004                 $out->setPageTitle( $this->getContext()->msg( 'internalerror' ) );
1005                 $out->setRobotPolicy( 'noindex,nofollow' );
1006                 $out->setArticleRelated( false );
1007                 $out->enableClientCache( false );
1008                 $out->addWikiText( $description );
1009         }
1010
1011         /**
1012          * Callback for usort() to do link sorts by (namespace, title)
1013          * Function copied from Title::compare()
1014          *
1015          * @param object $a Object page to compare with
1016          * @param object $b Object page to compare with
1017          * @return int Result of string comparison, or namespace comparison
1018          */
1019         protected function compare( $a, $b ) {
1020                 if ( $a->page_namespace == $b->page_namespace ) {
1021                         return strcmp( $a->page_title, $b->page_title );
1022                 } else {
1023                         return $a->page_namespace - $b->page_namespace;
1024                 }
1025         }
1026
1027         /**
1028          * Returns the corresponding $wgImageLimits entry for the selected user option
1029          *
1030          * @param User $user
1031          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
1032          * @return array
1033          * @since 1.21
1034          */
1035         public function getImageLimitsFromOption( $user, $optionName ) {
1036                 global $wgImageLimits;
1037
1038                 $option = $user->getIntOption( $optionName );
1039                 if ( !isset( $wgImageLimits[$option] ) ) {
1040                         $option = User::getDefaultOption( $optionName );
1041                 }
1042
1043                 // The user offset might still be incorrect, specially if
1044                 // $wgImageLimits got changed (see bug #8858).
1045                 if ( !isset( $wgImageLimits[$option] ) ) {
1046                         // Default to the first offset in $wgImageLimits
1047                         $option = 0;
1048                 }
1049
1050                 return isset( $wgImageLimits[$option] )
1051                         ? $wgImageLimits[$option]
1052                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
1053         }
1054
1055         /**
1056          * Output a drop-down box for language options for the file
1057          *
1058          * @param array $langChoices Array of string language codes
1059          * @param string $curLang Language code file is being viewed in.
1060          * @param string $defaultLang Language code that image is rendered in by default
1061          * @return string HTML to insert underneath image.
1062          */
1063         protected function doRenderLangOpt( array $langChoices, $curLang, $defaultLang ) {
1064                 global $wgScript;
1065                 sort( $langChoices );
1066                 $curLang = wfBCP47( $curLang );
1067                 $defaultLang = wfBCP47( $defaultLang );
1068                 $opts = '';
1069                 $haveCurrentLang = false;
1070                 $haveDefaultLang = false;
1071
1072                 // We make a list of all the language choices in the file.
1073                 // Additionally if the default language to render this file
1074                 // is not included as being in this file (for example, in svgs
1075                 // usually the fallback content is the english content) also
1076                 // include a choice for that. Last of all, if we're viewing
1077                 // the file in a language not on the list, add it as a choice.
1078                 foreach ( $langChoices as $lang ) {
1079                         $code = wfBCP47( $lang );
1080                         $name = Language::fetchLanguageName( $code, $this->getContext()->getLanguage()->getCode() );
1081                         if ( $name !== '' ) {
1082                                 $display = $this->getContext()->msg( 'img-lang-opt', $code, $name )->text();
1083                         } else {
1084                                 $display = $code;
1085                         }
1086                         $opts .= "\n" . Xml::option( $display, $code, $curLang === $code );
1087                         if ( $curLang === $code ) {
1088                                 $haveCurrentLang = true;
1089                         }
1090                         if ( $defaultLang === $code ) {
1091                                 $haveDefaultLang = true;
1092                         }
1093                 }
1094                 if ( !$haveDefaultLang ) {
1095                         // Its hard to know if the content is really in the default language, or
1096                         // if its just unmarked content that could be in any language.
1097                         $opts = Xml::option(
1098                                         $this->getContext()->msg( 'img-lang-default' )->text(),
1099                                 $defaultLang,
1100                                 $defaultLang === $curLang
1101                         ) . $opts;
1102                 }
1103                 if ( !$haveCurrentLang && $defaultLang !== $curLang ) {
1104                         $name = Language::fetchLanguageName( $curLang, $this->getContext()->getLanguage()->getCode() );
1105                         if ( $name !== '' ) {
1106                                 $display = $this->getContext()->msg( 'img-lang-opt', $curLang, $name )->text();
1107                         } else {
1108                                 $display = $curLang;
1109                         }
1110                         $opts = Xml::option( $display, $curLang, true ) . $opts;
1111                 }
1112
1113                 $select = Html::rawElement(
1114                         'select',
1115                         array( 'id' => 'mw-imglangselector', 'name' => 'lang' ),
1116                         $opts
1117                 );
1118                 $submit = Xml::submitButton( $this->getContext()->msg( 'img-lang-go' )->text() );
1119
1120                 $formContents = $this->getContext()->msg( 'img-lang-info' )
1121                         ->rawParams( $select, $submit )
1122                         ->parse();
1123                 $formContents .= Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() );
1124
1125                 $langSelectLine = Html::rawElement( 'div', array( 'id' => 'mw-imglangselector-line' ),
1126                         Html::rawElement( 'form', array( 'action' => $wgScript ), $formContents )
1127                 );
1128                 return $langSelectLine;
1129         }
1130
1131         /**
1132          * Get the width and height to display image at.
1133          *
1134          * @note This method assumes that it is only called if one
1135          *  of the dimensions are bigger than the max, or if the
1136          *  image is vectorized.
1137          *
1138          * @param int $maxWidth Max width to display at
1139          * @param int $maxHeight Max height to display at
1140          * @param int $width Actual width of the image
1141          * @param int $height Actual height of the image
1142          * @throws MWException
1143          * @return array Array (width, height)
1144          */
1145         protected function getDisplayWidthHeight( $maxWidth, $maxHeight, $width, $height ) {
1146                 if ( !$maxWidth || !$maxHeight ) {
1147                         // should never happen
1148                         throw new MWException( 'Using a choice from $wgImageLimits that is 0x0' );
1149                 }
1150
1151                 if ( !$width || !$height ) {
1152                         return array( 0, 0 );
1153                 }
1154
1155                 # Calculate the thumbnail size.
1156                 if ( $width <= $maxWidth && $height <= $maxHeight ) {
1157                         // Vectorized image, do nothing.
1158                 } elseif ( $width / $height >= $maxWidth / $maxHeight ) {
1159                         # The limiting factor is the width, not the height.
1160                         $height = round( $height * $maxWidth / $width );
1161                         $width = $maxWidth;
1162                         # Note that $height <= $maxHeight now.
1163                 } else {
1164                         $newwidth = floor( $width * $maxHeight / $height );
1165                         $height = round( $height * $newwidth / $width );
1166                         $width = $newwidth;
1167                         # Note that $height <= $maxHeight now, but might not be identical
1168                         # because of rounding.
1169                 }
1170                 return array( $width, $height );
1171         }
1172
1173         /**
1174          * Get alternative thumbnail sizes.
1175          *
1176          * @note This will only list several alternatives if thumbnails are rendered on 404
1177          * @param int $origWidth Actual width of image
1178          * @param int $origHeight Actual height of image
1179          * @return array An array of [width, height] pairs.
1180          */
1181         protected function getThumbSizes( $origWidth, $origHeight ) {
1182                 global $wgImageLimits;
1183                 if ( $this->displayImg->getRepo()->canTransformVia404() ) {
1184                         $thumbSizes = $wgImageLimits;
1185                         // Also include the full sized resolution in the list, so
1186                         // that users know they can get it. This will link to the
1187                         // original file asset if mustRender() === false. In the case
1188                         // that we mustRender, some users have indicated that they would
1189                         // find it useful to have the full size image in the rendered
1190                         // image format.
1191                         $thumbSizes[] = array( $origWidth, $origHeight );
1192                 } else {
1193                         # Creating thumb links triggers thumbnail generation.
1194                         # Just generate the thumb for the current users prefs.
1195                         $thumbSizes = array(
1196                                 $this->getImageLimitsFromOption( $this->getContext()->getUser(), 'thumbsize' )
1197                         );
1198                         if ( !$this->displayImg->mustRender() ) {
1199                                 // We can safely include a link to the "full-size" preview,
1200                                 // without actually rendering.
1201                                 $thumbSizes[] = array( $origWidth, $origHeight );
1202                         }
1203                 }
1204                 return $thumbSizes;
1205         }
1206
1207 }
1208
1209 /**
1210  * Builds the image revision log shown on image pages
1211  *
1212  * @ingroup Media
1213  */
1214 class ImageHistoryList extends ContextSource {
1215
1216         /**
1217          * @var Title
1218          */
1219         protected $title;
1220
1221         /**
1222          * @var File
1223          */
1224         protected $img;
1225
1226         /**
1227          * @var ImagePage
1228          */
1229         protected $imagePage;
1230
1231         /**
1232          * @var File
1233          */
1234         protected $current;
1235
1236         protected $repo, $showThumb;
1237         protected $preventClickjacking = false;
1238
1239         /**
1240          * @param ImagePage $imagePage
1241          */
1242         public function __construct( $imagePage ) {
1243                 global $wgShowArchiveThumbnails;
1244                 $this->current = $imagePage->getFile();
1245                 $this->img = $imagePage->getDisplayedFile();
1246                 $this->title = $imagePage->getTitle();
1247                 $this->imagePage = $imagePage;
1248                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
1249                 $this->setContext( $imagePage->getContext() );
1250         }
1251
1252         /**
1253          * @return ImagePage
1254          */
1255         public function getImagePage() {
1256                 return $this->imagePage;
1257         }
1258
1259         /**
1260          * @return File
1261          */
1262         public function getFile() {
1263                 return $this->img;
1264         }
1265
1266         /**
1267          * @param string $navLinks
1268          * @return string
1269          */
1270         public function beginImageHistoryList( $navLinks = '' ) {
1271                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() )
1272                         . "\n"
1273                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1274                         . $this->msg( 'filehist-help' )->parseAsBlock()
1275                         . $navLinks . "\n"
1276                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1277                         . '<tr><th></th>'
1278                         . ( $this->current->isLocal()
1279                                 && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<th></th>' : '' )
1280                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1281                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1282                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1283                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1284                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1285                         . "</tr>\n";
1286         }
1287
1288         /**
1289          * @param string $navLinks
1290          * @return string
1291          */
1292         public function endImageHistoryList( $navLinks = '' ) {
1293                 return "</table>\n$navLinks\n</div>\n";
1294         }
1295
1296         /**
1297          * @param bool $iscur
1298          * @param File $file
1299          * @return string
1300          */
1301         public function imageHistoryLine( $iscur, $file ) {
1302                 global $wgContLang;
1303
1304                 $user = $this->getUser();
1305                 $lang = $this->getLanguage();
1306                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1307                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1308                 $userId = $file->getUser( 'id' );
1309                 $userText = $file->getUser( 'text' );
1310                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1311
1312                 $local = $this->current->isLocal();
1313                 $row = $selected = '';
1314
1315                 // Deletion link
1316                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1317                         $row .= '<td>';
1318                         # Link to remove from history
1319                         if ( $user->isAllowed( 'delete' ) ) {
1320                                 $q = array( 'action' => 'delete' );
1321                                 if ( !$iscur ) {
1322                                         $q['oldimage'] = $img;
1323                                 }
1324                                 $row .= Linker::linkKnown(
1325                                         $this->title,
1326                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1327                                         array(), $q
1328                                 );
1329                         }
1330                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1331                         $canHide = $user->isAllowed( 'deleterevision' );
1332                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1333                                 if ( $user->isAllowed( 'delete' ) ) {
1334                                         $row .= '<br />';
1335                                 }
1336                                 // If file is top revision or locked from this user, don't link
1337                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1338                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1339                                 } else {
1340                                         list( $ts, ) = explode( '!', $img, 2 );
1341                                         $query = array(
1342                                                 'type' => 'oldimage',
1343                                                 'target' => $this->title->getPrefixedText(),
1344                                                 'ids' => $ts,
1345                                         );
1346                                         $del = Linker::revDeleteLink( $query,
1347                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1348                                 }
1349                                 $row .= $del;
1350                         }
1351                         $row .= '</td>';
1352                 }
1353
1354                 // Reversion link/current indicator
1355                 $row .= '<td>';
1356                 if ( $iscur ) {
1357                         $row .= $this->msg( 'filehist-current' )->escaped();
1358                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1359                         && $this->title->quickUserCan( 'upload', $user )
1360                 ) {
1361                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1362                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1363                         } else {
1364                                 $row .= Linker::linkKnown(
1365                                         $this->title,
1366                                         $this->msg( 'filehist-revert' )->escaped(),
1367                                         array(),
1368                                         array(
1369                                                 'action' => 'revert',
1370                                                 'oldimage' => $img,
1371                                                 'wpEditToken' => $user->getEditToken( $img )
1372                                         )
1373                                 );
1374                         }
1375                 }
1376                 $row .= '</td>';
1377
1378                 // Date/time and image link
1379                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1380                         $selected = "class='filehistory-selected'";
1381                 }
1382                 $row .= "<td $selected style='white-space: nowrap;'>";
1383                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1384                         # Don't link to unviewable files
1385                         $row .= '<span class="history-deleted">'
1386                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1387                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1388                         if ( $local ) {
1389                                 $this->preventClickjacking();
1390                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1391                                 # Make a link to review the image
1392                                 $url = Linker::linkKnown(
1393                                         $revdel,
1394                                         $lang->userTimeAndDate( $timestamp, $user ),
1395                                         array(),
1396                                         array(
1397                                                 'target' => $this->title->getPrefixedText(),
1398                                                 'file' => $img,
1399                                                 'token' => $user->getEditToken( $img )
1400                                         )
1401                                 );
1402                         } else {
1403                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1404                         }
1405                         $row .= '<span class="history-deleted">' . $url . '</span>';
1406                 } elseif ( !$file->exists() ) {
1407                         $row .= '<span class="mw-file-missing">'
1408                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1409                 } else {
1410                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1411                         $row .= Xml::element(
1412                                 'a',
1413                                 array( 'href' => $url ),
1414                                 $lang->userTimeAndDate( $timestamp, $user )
1415                         );
1416                 }
1417                 $row .= "</td>";
1418
1419                 // Thumbnail
1420                 if ( $this->showThumb ) {
1421                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1422                 }
1423
1424                 // Image dimensions + size
1425                 $row .= '<td>';
1426                 $row .= htmlspecialchars( $file->getDimensionsString() );
1427                 $row .= $this->msg( 'word-separator' )->escaped();
1428                 $row .= '<span style="white-space: nowrap;">';
1429                 $row .= $this->msg( 'parentheses' )->sizeParams( $file->getSize() )->escaped();
1430                 $row .= '</span>';
1431                 $row .= '</td>';
1432
1433                 // Uploading user
1434                 $row .= '<td>';
1435                 // Hide deleted usernames
1436                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1437                         $row .= '<span class="history-deleted">'
1438                                 . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1439                 } else {
1440                         if ( $local ) {
1441                                 $row .= Linker::userLink( $userId, $userText );
1442                                 $row .= '<span style="white-space: nowrap;">';
1443                                 $row .= Linker::userToolLinks( $userId, $userText );
1444                                 $row .= '</span>';
1445                         } else {
1446                                 $row .= htmlspecialchars( $userText );
1447                         }
1448                 }
1449                 $row .= '</td>';
1450
1451                 // Don't show deleted descriptions
1452                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1453                         $row .= '<td><span class="history-deleted">' .
1454                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1455                 } else {
1456                         $row .= '<td dir="' . $wgContLang->getDir() . '">' .
1457                                 Linker::formatComment( $description, $this->title ) . '</td>';
1458                 }
1459
1460                 $rowClass = null;
1461                 Hooks::run( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1462                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1463
1464                 return "<tr{$classAttr}>{$row}</tr>\n";
1465         }
1466
1467         /**
1468          * @param File $file
1469          * @return string
1470          */
1471         protected function getThumbForLine( $file ) {
1472                 $lang = $this->getLanguage();
1473                 $user = $this->getUser();
1474                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1475                         && !$file->isDeleted( File::DELETED_FILE )
1476                 ) {
1477                         $params = array(
1478                                 'width' => '120',
1479                                 'height' => '120',
1480                         );
1481                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1482
1483                         $thumbnail = $file->transform( $params );
1484                         $options = array(
1485                                 'alt' => $this->msg( 'filehist-thumbtext',
1486                                         $lang->userTimeAndDate( $timestamp, $user ),
1487                                         $lang->userDate( $timestamp, $user ),
1488                                         $lang->userTime( $timestamp, $user ) )->text(),
1489                                 'file-link' => true,
1490                         );
1491
1492                         if ( !$thumbnail ) {
1493                                 return $this->msg( 'filehist-nothumb' )->escaped();
1494                         }
1495
1496                         return $thumbnail->toHtml( $options );
1497                 } else {
1498                         return $this->msg( 'filehist-nothumb' )->escaped();
1499                 }
1500         }
1501
1502         /**
1503          * @param bool $enable
1504          */
1505         protected function preventClickjacking( $enable = true ) {
1506                 $this->preventClickjacking = $enable;
1507         }
1508
1509         /**
1510          * @return bool
1511          */
1512         public function getPreventClickjacking() {
1513                 return $this->preventClickjacking;
1514         }
1515 }
1516
1517 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1518         protected $preventClickjacking = false;
1519
1520         /**
1521          * @var File
1522          */
1523         protected $mImg;
1524
1525         /**
1526          * @var Title
1527          */
1528         protected $mTitle;
1529
1530         /**
1531          * @param ImagePage $imagePage
1532          */
1533         function __construct( $imagePage ) {
1534                 parent::__construct( $imagePage->getContext() );
1535                 $this->mImagePage = $imagePage;
1536                 $this->mTitle = clone $imagePage->getTitle();
1537                 $this->mTitle->setFragment( '#filehistory' );
1538                 $this->mImg = null;
1539                 $this->mHist = array();
1540                 $this->mRange = array( 0, 0 ); // display range
1541         }
1542
1543         /**
1544          * @return Title
1545          */
1546         function getTitle() {
1547                 return $this->mTitle;
1548         }
1549
1550         function getQueryInfo() {
1551                 return false;
1552         }
1553
1554         /**
1555          * @return string
1556          */
1557         function getIndexField() {
1558                 return '';
1559         }
1560
1561         /**
1562          * @param object $row
1563          * @return string
1564          */
1565         function formatRow( $row ) {
1566                 return '';
1567         }
1568
1569         /**
1570          * @return string
1571          */
1572         function getBody() {
1573                 $s = '';
1574                 $this->doQuery();
1575                 if ( count( $this->mHist ) ) {
1576                         if ( $this->mImg->isLocal() ) {
1577                                 // Do a batch existence check for user pages and talkpages
1578                                 $linkBatch = new LinkBatch();
1579                                 for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1580                                         $file = $this->mHist[$i];
1581                                         $user = $file->getUser( 'text' );
1582                                         $linkBatch->add( NS_USER, $user );
1583                                         $linkBatch->add( NS_USER_TALK, $user );
1584                                 }
1585                                 $linkBatch->execute();
1586                         }
1587
1588                         $list = new ImageHistoryList( $this->mImagePage );
1589                         # Generate prev/next links
1590                         $navLink = $this->getNavigationBar();
1591                         $s = $list->beginImageHistoryList( $navLink );
1592                         // Skip rows there just for paging links
1593                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1594                                 $file = $this->mHist[$i];
1595                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1596                         }
1597                         $s .= $list->endImageHistoryList( $navLink );
1598
1599                         if ( $list->getPreventClickjacking() ) {
1600                                 $this->preventClickjacking();
1601                         }
1602                 }
1603                 return $s;
1604         }
1605
1606         function doQuery() {
1607                 if ( $this->mQueryDone ) {
1608                         return;
1609                 }
1610                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1611                 if ( !$this->mImg->exists() ) {
1612                         return;
1613                 }
1614                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1615                 if ( $this->mIsBackwards ) {
1616                         // Fetch the file history
1617                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1618                         // The current rev may not meet the offset/limit
1619                         $numRows = count( $this->mHist );
1620                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1621                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1622                         }
1623                 } else {
1624                         // The current rev may not meet the offset
1625                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1626                                 $this->mHist[] = $this->mImg;
1627                         }
1628                         // Old image versions (fetch extra row for nav links)
1629                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1630                         // Fetch the file history
1631                         $this->mHist = array_merge( $this->mHist,
1632                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1633                 }
1634                 $numRows = count( $this->mHist ); // Total number of query results
1635                 if ( $numRows ) {
1636                         # Index value of top item in the list
1637                         $firstIndex = $this->mIsBackwards ?
1638                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1639                         # Discard the extra result row if there is one
1640                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1641                                 if ( $this->mIsBackwards ) {
1642                                         # Index value of item past the index
1643                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1644                                         # Index value of bottom item in the list
1645                                         $lastIndex = $this->mHist[1]->getTimestamp();
1646                                         # Display range
1647                                         $this->mRange = array( 1, $numRows - 1 );
1648                                 } else {
1649                                         # Index value of item past the index
1650                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1651                                         # Index value of bottom item in the list
1652                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1653                                         # Display range
1654                                         $this->mRange = array( 0, $numRows - 2 );
1655                                 }
1656                         } else {
1657                                 # Setting indexes to an empty string means that they will be
1658                                 # omitted if they would otherwise appear in URLs. It just so
1659                                 # happens that this  is the right thing to do in the standard
1660                                 # UI, in all the relevant cases.
1661                                 $this->mPastTheEndIndex = '';
1662                                 # Index value of bottom item in the list
1663                                 $lastIndex = $this->mIsBackwards ?
1664                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1665                                 # Display range
1666                                 $this->mRange = array( 0, $numRows - 1 );
1667                         }
1668                 } else {
1669                         $firstIndex = '';
1670                         $lastIndex = '';
1671                         $this->mPastTheEndIndex = '';
1672                 }
1673                 if ( $this->mIsBackwards ) {
1674                         $this->mIsFirst = ( $numRows < $queryLimit );
1675                         $this->mIsLast = ( $this->mOffset == '' );
1676                         $this->mLastShown = $firstIndex;
1677                         $this->mFirstShown = $lastIndex;
1678                 } else {
1679                         $this->mIsFirst = ( $this->mOffset == '' );
1680                         $this->mIsLast = ( $numRows < $queryLimit );
1681                         $this->mLastShown = $lastIndex;
1682                         $this->mFirstShown = $firstIndex;
1683                 }
1684                 $this->mQueryDone = true;
1685         }
1686
1687         /**
1688          * @param bool $enable
1689          */
1690         protected function preventClickjacking( $enable = true ) {
1691                 $this->preventClickjacking = $enable;
1692         }
1693
1694         /**
1695          * @return bool
1696          */
1697         public function getPreventClickjacking() {
1698                 return $this->preventClickjacking;
1699         }
1700
1701 }