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 use Wikimedia\Rdbms\ResultWrapper;
  24
  25 /**
  26  * Class for viewing MediaWiki file description pages
  27  *
  28  * @ingroup Media
  29  */
  30 class ImagePage extends Article {
  31         /** @var File */
  32         private $displayImg;
  33
  34         /** @var FileRepo */
  35         private $repo;
  36
  37         /** @var bool */
  38         private $fileLoaded;
  39
  40         /** @var bool */
  41         protected $mExtraDescription = false;
  42
  43         /**
  44          * @var WikiFilePage
  45          */
  46         protected $mPage;
  47
  48         /**
  49          * @param Title $title
  50          * @return WikiFilePage
  51          */
  52         protected function newPage( Title $title ) {
  53                 // Overload mPage with a file-specific page
  54                 return new WikiFilePage( $title );
  55         }
  56
  57         /**
  58          * @param File $file
  59          * @return void
  60          */
  61         public function setFile( $file ) {
  62                 $this->mPage->setFile( $file );
  63                 $this->displayImg = $file;
  64                 $this->fileLoaded = true;
  65         }
  66
  67         protected function loadFile() {
  68                 if ( $this->fileLoaded ) {
  69                         return;
  70                 }
  71                 $this->fileLoaded = true;
  72
  73                 $this->displayImg = $img = false;
  74
  75                 Hooks::run( 'ImagePageFindFile', [ $this, &$img, &$this->displayImg ] );
  76                 if ( !$img ) { // not set by hook?
  77                         $img = wfFindFile( $this->getTitle() );
  78                         if ( !$img ) {
  79                                 $img = wfLocalFile( $this->getTitle() );
  80                         }
  81                 }
  82                 $this->mPage->setFile( $img );
  83                 if ( !$this->displayImg ) { // not set by hook?
  84                         $this->displayImg = $img;
  85                 }
  86                 $this->repo = $img->getRepo();
  87         }
  88
  89         /**
  90          * Handler for action=render
  91          * Include body text only; none of the image extras
  92          */
  93         public function render() {
  94                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
  95                 parent::view();
  96         }
  97
  98         public function view() {
  99                 global $wgShowEXIF;
 100
 101                 $out = $this->getContext()->getOutput();
 102                 $request = $this->getContext()->getRequest();
 103                 $diff = $request->getVal( 'diff' );
 104                 $diffOnly = $request->getBool(
 105                         'diffonly',
 106                         $this->getContext()->getUser()->getOption( 'diffonly' )
 107                 );
 108
 109                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( $diff !== null && $diffOnly ) ) {
 110                         parent::view();
 111                         return;
 112                 }
 113
 114                 $this->loadFile();
 115
 116                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
 117                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || $diff !== null ) {
 118                                 $request->setVal( 'diffonly', 'true' );
 119                         }
 120
 121                         parent::view();
 122                         return;
 123                 }
 124
 125                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 126                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 127                         $formattedMetadata = $this->displayImg->formatMetadata( $this->getContext() );
 128                         $showmeta = $formattedMetadata !== false;
 129                 } else {
 130                         $showmeta = false;
 131                 }
 132
 133                 if ( !$diff && $this->displayImg->exists() ) {
 134                         $out->addHTML( $this->showTOC( $showmeta ) );
 135                 }
 136
 137                 if ( !$diff ) {
 138                         $this->openShowImage();
 139                 }
 140
 141                 # No need to display noarticletext, we use our own message, output in openShowImage()
 142                 if ( $this->mPage->getId() ) {
 143                         # NS_FILE is in the user language, but this section (the actual wikitext)
 144                         # should be in page content language
 145                         $pageLang = $this->getTitle()->getPageViewLanguage();
 146                         $out->addHTML( Xml::openElement( 'div', [ 'id' => 'mw-imagepage-content',
 147                                 'lang' => $pageLang->getHtmlCode(), 'dir' => $pageLang->getDir(),
 148                                 'class' => 'mw-content-' . $pageLang->getDir() ] ) );
 149
 150                         parent::view();
 151
 152                         $out->addHTML( Xml::closeElement( 'div' ) );
 153                 } else {
 154                         # Just need to set the right headers
 155                         $out->setArticleFlag( true );
 156                         $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 157                         $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 158                 }
 159
 160                 # Show shared description, if needed
 161                 if ( $this->mExtraDescription ) {
 162                         $fol = $this->getContext()->msg( 'shareddescriptionfollows' );
 163                         if ( !$fol->isDisabled() ) {
 164                                 $out->addWikiText( $fol->plain() );
 165                         }
 166                         $out->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 167                 }
 168
 169                 $this->closeShowImage();
 170                 $this->imageHistory();
 171                 // TODO: Cleanup the following
 172
 173                 $out->addHTML( Xml::element( 'h2',
 174                         [ 'id' => 'filelinks' ],
 175                                 $this->getContext()->msg( 'imagelinks' )->text() ) . "\n" );
 176                 $this->imageDupes();
 177                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 178                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 179                 $this->imageLinks();
 180
 181                 # Allow extensions to add something after the image links
 182                 $html = '';
 183                 Hooks::run( 'ImagePageAfterImageLinks', [ $this, &$html ] );
 184                 if ( $html ) {
 185                         $out->addHTML( $html );
 186                 }
 187
 188                 if ( $showmeta ) {
 189                         $out->addHTML( Xml::element(
 190                                 'h2',
 191                                 [ 'id' => 'metadata' ],
 192                                         $this->getContext()->msg( 'metadata' )->text() ) . "\n" );
 193                         $out->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 194                         $out->addModules( [ 'mediawiki.action.view.metadata' ] );
 195                 }
 196
 197                 // Add remote Filepage.css
 198                 if ( !$this->repo->isLocal() ) {
 199                         $css = $this->repo->getDescriptionStylesheetUrl();
 200                         if ( $css ) {
 201                                 $out->addStyle( $css );
 202                         }
 203                 }
 204
 205                 $out->addModuleStyles( [
 206                         'filepage', // always show the local local Filepage.css, T31277
 207                         'mediawiki.action.view.filepage', // Add MediaWiki styles for a file page
 208                 ] );
 209         }
 210
 211         /**
 212          * @return File
 213          */
 214         public function getDisplayedFile() {
 215                 $this->loadFile();
 216                 return $this->displayImg;
 217         }
 218
 219         /**
 220          * Create the TOC
 221          *
 222          * @param bool $metadata Whether or not to show the metadata link
 223          * @return string
 224          */
 225         protected function showTOC( $metadata ) {
 226                 $r = [
 227                         '<li><a href="#file">' . $this->getContext()->msg( 'file-anchor-link' )->escaped() . '</a></li>',
 228                         '<li><a href="#filehistory">' . $this->getContext()->msg( 'filehist' )->escaped() . '</a></li>',
 229                         '<li><a href="#filelinks">' . $this->getContext()->msg( 'imagelinks' )->escaped() . '</a></li>',
 230                 ];
 231
 232                 Hooks::run( 'ImagePageShowTOC', [ $this, &$r ] );
 233
 234                 if ( $metadata ) {
 235                         $r[] = '<li><a href="#metadata">' .
 236                                 $this->getContext()->msg( 'metadata' )->escaped() .
 237                                 '</a></li>';
 238                 }
 239
 240                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 241         }
 242
 243         /**
 244          * Make a table with metadata to be shown in the output page.
 245          *
 246          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 247          *
 248          * @param array $metadata The array containing the Exif data
 249          * @return string The metadata table. This is treated as Wikitext (!)
 250          */
 251         protected function makeMetadataTable( $metadata ) {
 252                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 253                 $r .= $this->getContext()->msg( 'metadata-help' )->plain();
 254                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 255                 foreach ( $metadata as $type => $stuff ) {
 256                         foreach ( $stuff as $v ) {
 257                                 $class = str_replace( ' ', '_', $v['id'] );
 258                                 if ( $type == 'collapsed' ) {
 259                                         // Handled by mediawiki.action.view.metadata module.
 260                                         $class .= ' collapsable';
 261                                 }
 262                                 $r .= Html::rawElement( 'tr',
 263                                         [ 'class' => $class ],
 264                                         Html::rawElement( 'th', [], $v['name'] )
 265                                                 . Html::rawElement( 'td', [], $v['value'] )
 266                                 );
 267                         }
 268                 }
 269                 $r .= "</table>\n</div>\n";
 270                 return $r;
 271         }
 272
 273         /**
 274          * Overloading Article's getContentObject method.
 275          *
 276          * Omit noarticletext if sharedupload; text will be fetched from the
 277          * shared upload server if possible.
 278          * @return string
 279          */
 280         public function getContentObject() {
 281                 $this->loadFile();
 282                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getId() ) {
 283                         return null;
 284                 }
 285                 return parent::getContentObject();
 286         }
 287
 288         private function getLanguageForRendering( WebRequest $request, File $file ) {
 289                 $handler = $this->displayImg->getHandler();
 290                 if ( !$handler ) {
 291                         return null;
 292                 }
 293
 294                 $requestLanguage = $request->getVal( 'lang' );
 295                 if ( !is_null( $requestLanguage ) ) {
 296                         if ( $handler->validateParam( 'lang', $requestLanguage ) ) {
 297                                 return $requestLanguage;
 298                         }
 299                 }
 300
 301                 return $handler->getDefaultRenderLanguage( $this->displayImg );
 302         }
 303
 304         protected function openShowImage() {
 305                 global $wgEnableUploads, $wgSend404Code, $wgSVGMaxSize;
 306
 307                 $this->loadFile();
 308                 $out = $this->getContext()->getOutput();
 309                 $user = $this->getContext()->getUser();
 310                 $lang = $this->getContext()->getLanguage();
 311                 $dirmark = $lang->getDirMarkEntity();
 312                 $request = $this->getContext()->getRequest();
 313
 314                 $max = $this->getImageLimitsFromOption( $user, 'imagesize' );
 315                 $maxWidth = $max[0];
 316                 $maxHeight = $max[1];
 317
 318                 if ( $this->displayImg->exists() ) {
 319                         # image
 320                         $page = $request->getIntOrNull( 'page' );
 321                         if ( is_null( $page ) ) {
 322                                 $params = [];
 323                                 $page = 1;
 324                         } else {
 325                                 $params = [ 'page' => $page ];
 326                         }
 327
 328                         $renderLang = $this->getLanguageForRendering( $request, $this->displayImg );
 329                         if ( !is_null( $renderLang ) ) {
 330                                 $params['lang'] = $renderLang;
 331                         }
 332
 333                         $width_orig = $this->displayImg->getWidth( $page );
 334                         $width = $width_orig;
 335                         $height_orig = $this->displayImg->getHeight( $page );
 336                         $height = $height_orig;
 337
 338                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 339                         $linktext = $filename;
 340
 341                         // Avoid PHP 7.1 warning from passing $this by reference
 342                         $imagePage = $this;
 343
 344                         Hooks::run( 'ImageOpenShowImageInlineBefore', [ &$imagePage, &$out ] );
 345
 346                         if ( $this->displayImg->allowInlineDisplay() ) {
 347                                 # image
 348                                 # "Download high res version" link below the image
 349                                 # $msgsize = $this->getContext()->msg( 'file-info-size', $width_orig, $height_orig,
 350                                 #   Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 351                                 # We'll show a thumbnail of this image
 352                                 if ( $width > $maxWidth || $height > $maxHeight || $this->displayImg->isVectorized() ) {
 353                                         list( $width, $height ) = $this->getDisplayWidthHeight(
 354                                                 $maxWidth, $maxHeight, $width, $height
 355                                         );
 356                                         $linktext = $this->getContext()->msg( 'show-big-image' )->escaped();
 357
 358                                         $thumbSizes = $this->getThumbSizes( $width_orig, $height_orig );
 359                                         # Generate thumbnails or thumbnail links as needed...
 360                                         $otherSizes = [];
 361                                         foreach ( $thumbSizes as $size ) {
 362                                                 // We include a thumbnail size in the list, if it is
 363                                                 // less than or equal to the original size of the image
 364                                                 // asset ($width_orig/$height_orig). We also exclude
 365                                                 // the current thumbnail's size ($width/$height)
 366                                                 // since that is added to the message separately, so
 367                                                 // it can be denoted as the current size being shown.
 368                                                 // Vectorized images are limited by $wgSVGMaxSize big,
 369                                                 // so all thumbs less than or equal that are shown.
 370                                                 if ( ( ( $size[0] <= $width_orig && $size[1] <= $height_orig )
 371                                                                 || ( $this->displayImg->isVectorized()
 372                                                                         && max( $size[0], $size[1] ) <= $wgSVGMaxSize )
 373                                                         )
 374                                                         && $size[0] != $width && $size[1] != $height
 375                                                 ) {
 376                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 377                                                         if ( $sizeLink ) {
 378                                                                 $otherSizes[] = $sizeLink;
 379                                                         }
 380                                                 }
 381                                         }
 382                                         $otherSizes = array_unique( $otherSizes );
 383
 384                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 385                                         $msgsmall = $this->getThumbPrevText( $params, $sizeLinkBigImagePreview );
 386                                         if ( count( $otherSizes ) ) {
 387                                                 $msgsmall .= ' ' .
 388                                                 Html::rawElement(
 389                                                         'span',
 390                                                         [ 'class' => 'mw-filepage-other-resolutions' ],
 391                                                         $this->getContext()->msg( 'show-big-image-other' )
 392                                                                 ->rawParams( $lang->pipeList( $otherSizes ) )
 393                                                                 ->params( count( $otherSizes ) )
 394                                                                 ->parse()
 395                                                 );
 396                                         }
 397                                 } elseif ( $width == 0 && $height == 0 ) {
 398                                         # Some sort of audio file that doesn't have dimensions
 399                                         # Don't output a no hi res message for such a file
 400                                         $msgsmall = '';
 401                                 } else {
 402                                         # Image is small enough to show full size on image page
 403                                         $msgsmall = $this->getContext()->msg( 'file-nohires' )->parse();
 404                                 }
 405
 406                                 $params['width'] = $width;
 407                                 $params['height'] = $height;
 408                                 $thumbnail = $this->displayImg->transform( $params );
 409                                 Linker::processResponsiveImages( $this->displayImg, $thumbnail, $params );
 410
 411                                 $anchorclose = Html::rawElement(
 412                                         'div',
 413                                         [ 'class' => 'mw-filepage-resolutioninfo' ],
 414                                         $msgsmall
 415                                 );
 416
 417                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 418                                 if ( $isMulti ) {
 419                                         $out->addModules( 'mediawiki.page.image.pagination' );
 420                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 421                                 }
 422
 423                                 if ( $thumbnail ) {
 424                                         $options = [
 425                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 426                                                 'file-link' => true,
 427                                         ];
 428                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 429                                                 $thumbnail->toHtml( $options ) .
 430                                                 $anchorclose . "</div>\n" );
 431                                 }
 432
 433                                 if ( $isMulti ) {
 434                                         $count = $this->displayImg->pageCount();
 435
 436                                         if ( $page > 1 ) {
 437                                                 $label = $this->getContext()->msg( 'imgmultipageprev' )->text();
 438                                                 // on the client side, this link is generated in ajaxifyPageNavigation()
 439                                                 // in the mediawiki.page.image.pagination module
 440                                                 $link = Linker::linkKnown(
 441                                                         $this->getTitle(),
 442                                                         $label,
 443                                                         [],
 444                                                         [ 'page' => $page - 1 ]
 445                                                 );
 446                                                 $thumb1 = Linker::makeThumbLinkObj(
 447                                                         $this->getTitle(),
 448                                                         $this->displayImg,
 449                                                         $link,
 450                                                         $label,
 451                                                         'none',
 452                                                         [ 'page' => $page - 1 ]
 453                                                 );
 454                                         } else {
 455                                                 $thumb1 = '';
 456                                         }
 457
 458                                         if ( $page < $count ) {
 459                                                 $label = $this->getContext()->msg( 'imgmultipagenext' )->text();
 460                                                 $link = Linker::linkKnown(
 461                                                         $this->getTitle(),
 462                                                         $label,
 463                                                         [],
 464                                                         [ 'page' => $page + 1 ]
 465                                                 );
 466                                                 $thumb2 = Linker::makeThumbLinkObj(
 467                                                         $this->getTitle(),
 468                                                         $this->displayImg,
 469                                                         $link,
 470                                                         $label,
 471                                                         'none',
 472                                                         [ 'page' => $page + 1 ]
 473                                                 );
 474                                         } else {
 475                                                 $thumb2 = '';
 476                                         }
 477
 478                                         global $wgScript;
 479
 480                                         $formParams = [
 481                                                 'name' => 'pageselector',
 482                                                 'action' => $wgScript,
 483                                         ];
 484                                         $options = [];
 485                                         for ( $i = 1; $i <= $count; $i++ ) {
 486                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 487                                         }
 488                                         $select = Xml::tags( 'select',
 489                                                 [ 'id' => 'pageselector', 'name' => 'page' ],
 490                                                 implode( "\n", $options ) );
 491
 492                                         $out->addHTML(
 493                                                 '</td><td><div class="multipageimagenavbox">' .
 494                                                 Xml::openElement( 'form', $formParams ) .
 495                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 496                                                 $this->getContext()->msg( 'imgmultigoto' )->rawParams( $select )->parse() .
 497                                                 $this->getContext()->msg( 'word-separator' )->escaped() .
 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( [ '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 T27277.
 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                                 $out->addHTML( $this->doRenderLangOpt( $renderLangOptions, $renderLang ) );
 559                         }
 560
 561                         // Add cannot animate thumbnail warning
 562                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 563                                 // Include the extension so wiki admins can
 564                                 // customize it on a per file-type basis
 565                                 // (aka say things like use format X instead).
 566                                 // additionally have a specific message for
 567                                 // file-no-thumb-animation-gif
 568                                 $ext = $this->displayImg->getExtension();
 569                                 $noAnimMesg = wfMessageFallback(
 570                                         'file-no-thumb-animation-' . $ext,
 571                                         'file-no-thumb-animation'
 572                                 )->plain();
 573
 574                                 $out->addWikiText( <<<EOT
 575 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 576 EOT
 577                                 );
 578                         }
 579
 580                         if ( !$this->displayImg->isLocal() ) {
 581                                 $this->printSharedImageText();
 582                         }
 583                 } else {
 584                         # Image does not exist
 585                         if ( !$this->getId() ) {
 586                                 $dbr = wfGetDB( DB_REPLICA );
 587
 588                                 # No article exists either
 589                                 # Show deletion log to be consistent with normal articles
 590                                 LogEventsList::showLogExtract(
 591                                         $out,
 592                                         [ 'delete', 'move' ],
 593                                         $this->getTitle()->getPrefixedText(),
 594                                         '',
 595                                         [ 'lim' => 10,
 596                                                 'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
 597                                                 'showIfEmpty' => false,
 598                                                 'msgKey' => [ 'moveddeleted-notice' ]
 599                                         ]
 600                                 );
 601                         }
 602
 603                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 604                                 // Only show an upload link if the user can upload
 605                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 606                                 $nofile = [
 607                                         'filepage-nofile-link',
 608                                         $uploadTitle->getFullURL( [ 'wpDestFile' => $this->mPage->getFile()->getName() ] )
 609                                 ];
 610                         } else {
 611                                 $nofile = 'filepage-nofile';
 612                         }
 613                         // Note, if there is an image description page, but
 614                         // no image, then this setRobotPolicy is overridden
 615                         // by Article::View().
 616                         $out->setRobotPolicy( 'noindex,nofollow' );
 617                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 618                         if ( !$this->getId() && $wgSend404Code ) {
 619                                 // If there is no image, no shared image, and no description page,
 620                                 // output a 404, to be consistent with Article::showMissingArticle.
 621                                 $request->response()->statusHeader( 404 );
 622                         }
 623                 }
 624                 $out->setFileVersion( $this->displayImg );
 625         }
 626
 627         /**
 628          * Make the text under the image to say what size preview
 629          *
 630          * @param array $params parameters for thumbnail
 631          * @param string $sizeLinkBigImagePreview HTML for the current size
 632          * @return string HTML output
 633          */
 634         private function getThumbPrevText( $params, $sizeLinkBigImagePreview ) {
 635                 if ( $sizeLinkBigImagePreview ) {
 636                         // Show a different message of preview is different format from original.
 637                         $previewTypeDiffers = false;
 638                         $origExt = $thumbExt = $this->displayImg->getExtension();
 639                         if ( $this->displayImg->getHandler() ) {
 640                                 $origMime = $this->displayImg->getMimeType();
 641                                 $typeParams = $params;
 642                                 $this->displayImg->getHandler()->normaliseParams( $this->displayImg, $typeParams );
 643                                 list( $thumbExt, $thumbMime ) = $this->displayImg->getHandler()->getThumbType(
 644                                         $origExt, $origMime, $typeParams );
 645                                 if ( $thumbMime !== $origMime ) {
 646                                         $previewTypeDiffers = true;
 647                                 }
 648                         }
 649                         if ( $previewTypeDiffers ) {
 650                                 return $this->getContext()->msg( 'show-big-image-preview-differ' )->
 651                                         rawParams( $sizeLinkBigImagePreview )->
 652                                         params( strtoupper( $origExt ) )->
 653                                         params( strtoupper( $thumbExt ) )->
 654                                         parse();
 655                         } else {
 656                                 return $this->getContext()->msg( 'show-big-image-preview' )->
 657                                         rawParams( $sizeLinkBigImagePreview )->
 658                                 parse();
 659                         }
 660                 } else {
 661                         return '';
 662                 }
 663         }
 664
 665         /**
 666          * Creates an thumbnail of specified size and returns an HTML link to it
 667          * @param array $params Scaler parameters
 668          * @param int $width
 669          * @param int $height
 670          * @return string
 671          */
 672         private function makeSizeLink( $params, $width, $height ) {
 673                 $params['width'] = $width;
 674                 $params['height'] = $height;
 675                 $thumbnail = $this->displayImg->transform( $params );
 676                 if ( $thumbnail && !$thumbnail->isError() ) {
 677                         return Html::rawElement( 'a', [
 678                                 'href' => $thumbnail->getUrl(),
 679                                 'class' => 'mw-thumbnail-link'
 680                                 ], $this->getContext()->msg( 'show-big-image-size' )->numParams(
 681                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 682                                 )->parse() );
 683                 } else {
 684                         return '';
 685                 }
 686         }
 687
 688         /**
 689          * Show a notice that the file is from a shared repository
 690          */
 691         protected function printSharedImageText() {
 692                 $out = $this->getContext()->getOutput();
 693                 $this->loadFile();
 694
 695                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 696                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 697
 698                 /* Add canonical to head if there is no local page for this shared file */
 699                 if ( $descUrl && $this->mPage->getId() == 0 ) {
 700                         $out->setCanonicalUrl( $descUrl );
 701                 }
 702
 703                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 704                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 705
 706                 if ( $descUrl &&
 707                         $descText &&
 708                         $this->getContext()->msg( 'sharedupload-desc-here' )->plain() !== '-'
 709                 ) {
 710                         $out->wrapWikiMsg( $wrap, [ 'sharedupload-desc-here', $repo, $descUrl ] );
 711                 } elseif ( $descUrl &&
 712                         $this->getContext()->msg( 'sharedupload-desc-there' )->plain() !== '-'
 713                 ) {
 714                         $out->wrapWikiMsg( $wrap, [ 'sharedupload-desc-there', $repo, $descUrl ] );
 715                 } else {
 716                         $out->wrapWikiMsg( $wrap, [ 'sharedupload', $repo ], ''/*BACKCOMPAT*/ );
 717                 }
 718
 719                 if ( $descText ) {
 720                         $this->mExtraDescription = $descText;
 721                 }
 722         }
 723
 724         public function getUploadUrl() {
 725                 $this->loadFile();
 726                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 727                 return $uploadTitle->getFullURL( [
 728                         'wpDestFile' => $this->mPage->getFile()->getName(),
 729                         'wpForReUpload' => 1
 730                 ] );
 731         }
 732
 733         /**
 734          * Print out the various links at the bottom of the image page, e.g. reupload,
 735          * external editing (and instructions link) etc.
 736          */
 737         protected function uploadLinksBox() {
 738                 global $wgEnableUploads;
 739
 740                 if ( !$wgEnableUploads ) {
 741                         return;
 742                 }
 743
 744                 $this->loadFile();
 745                 if ( !$this->mPage->getFile()->isLocal() ) {
 746                         return;
 747                 }
 748
 749                 $out = $this->getContext()->getOutput();
 750                 $out->addHTML( "<ul>\n" );
 751
 752                 # "Upload a new version of this file" link
 753                 $canUpload = $this->getTitle()->quickUserCan( 'upload', $this->getContext()->getUser() );
 754                 if ( $canUpload && UploadBase::userCanReUpload(
 755                                 $this->getContext()->getUser(),
 756                                 $this->mPage->getFile() )
 757                 ) {
 758                         $ulink = Linker::makeExternalLink(
 759                                 $this->getUploadUrl(),
 760                                 $this->getContext()->msg( 'uploadnewversion-linktext' )->text()
 761                         );
 762                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\">"
 763                                 . "<div class=\"plainlinks\">{$ulink}</div></li>\n" );
 764                 } else {
 765                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">"
 766                                 . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 767                 }
 768
 769                 $out->addHTML( "</ul>\n" );
 770         }
 771
 772         /**
 773          * For overloading
 774          */
 775         protected function closeShowImage() {
 776         }
 777
 778         /**
 779          * If the page we've just displayed is in the "Image" namespace,
 780          * we follow it with an upload history of the image and its usage.
 781          */
 782         protected function imageHistory() {
 783                 $this->loadFile();
 784                 $out = $this->getContext()->getOutput();
 785                 $pager = new ImageHistoryPseudoPager( $this );
 786                 $out->addHTML( $pager->getBody() );
 787                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 788
 789                 $this->mPage->getFile()->resetHistory(); // free db resources
 790
 791                 # Exist check because we don't want to show this on pages where an image
 792                 # doesn't exist along with the noimage message, that would suck. -ævar
 793                 if ( $this->mPage->getFile()->exists() ) {
 794                         $this->uploadLinksBox();
 795                 }
 796         }
 797
 798         /**
 799          * @param string $target
 800          * @param int $limit
 801          * @return ResultWrapper
 802          */
 803         protected function queryImageLinks( $target, $limit ) {
 804                 $dbr = wfGetDB( DB_REPLICA );
 805
 806                 return $dbr->select(
 807                         [ 'imagelinks', 'page' ],
 808                         [ 'page_namespace', 'page_title', 'il_to' ],
 809                         [ 'il_to' => $target, 'il_from = page_id' ],
 810                         __METHOD__,
 811                         [ 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', ]
 812                 );
 813         }
 814
 815         protected function imageLinks() {
 816                 $limit = 100;
 817
 818                 $out = $this->getContext()->getOutput();
 819
 820                 $rows = [];
 821                 $redirects = [];
 822                 foreach ( $this->getTitle()->getRedirectsHere( NS_FILE ) as $redir ) {
 823                         $redirects[$redir->getDBkey()] = [];
 824                         $rows[] = (object)[
 825                                 'page_namespace' => NS_FILE,
 826                                 'page_title' => $redir->getDBkey(),
 827                         ];
 828                 }
 829
 830                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 831                 foreach ( $res as $row ) {
 832                         $rows[] = $row;
 833                 }
 834                 $count = count( $rows );
 835
 836                 $hasMore = $count > $limit;
 837                 if ( !$hasMore && count( $redirects ) ) {
 838                         $res = $this->queryImageLinks( array_keys( $redirects ),
 839                                 $limit - count( $rows ) + 1 );
 840                         foreach ( $res as $row ) {
 841                                 $redirects[$row->il_to][] = $row;
 842                                 $count++;
 843                         }
 844                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 845                 }
 846
 847                 if ( $count == 0 ) {
 848                         $out->wrapWikiMsg(
 849                                 Html::rawElement( 'div',
 850                                         [ 'id' => 'mw-imagepage-nolinkstoimage' ], "\n$1\n" ),
 851                                 'nolinkstoimage'
 852                         );
 853                         return;
 854                 }
 855
 856                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 857                 if ( !$hasMore ) {
 858                         $out->addWikiMsg( 'linkstoimage', $count );
 859                 } else {
 860                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 861                         $out->addWikiMsg( 'linkstoimage-more',
 862                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 863                                 $this->getTitle()->getPrefixedDBkey()
 864                         );
 865                 }
 866
 867                 $out->addHTML(
 868                         Html::openElement( 'ul',
 869                                 [ 'class' => 'mw-imagepage-linkstoimage' ] ) . "\n"
 870                 );
 871                 $count = 0;
 872
 873                 // Sort the list by namespace:title
 874                 usort( $rows, [ $this, 'compare' ] );
 875
 876                 // Create links for every element
 877                 $currentCount = 0;
 878                 foreach ( $rows as $element ) {
 879                         $currentCount++;
 880                         if ( $currentCount > $limit ) {
 881                                 break;
 882                         }
 883
 884                         $query = [];
 885                         # Add a redirect=no to make redirect pages reachable
 886                         if ( isset( $redirects[$element->page_title] ) ) {
 887                                 $query['redirect'] = 'no';
 888                         }
 889                         $link = Linker::linkKnown(
 890                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 891                                 null, [], $query
 892                         );
 893                         if ( !isset( $redirects[$element->page_title] ) ) {
 894                                 # No redirects
 895                                 $liContents = $link;
 896                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 897                                 # Redirect without usages
 898                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )
 899                                         ->rawParams( $link, '' )
 900                                         ->parse();
 901                         } else {
 902                                 # Redirect with usages
 903                                 $li = '';
 904                                 foreach ( $redirects[$element->page_title] as $row ) {
 905                                         $currentCount++;
 906                                         if ( $currentCount > $limit ) {
 907                                                 break;
 908                                         }
 909
 910                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 911                                         $li .= Html::rawElement(
 912                                                 'li',
 913                                                 [ 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ],
 914                                                 $link2
 915                                                 ) . "\n";
 916                                 }
 917
 918                                 $ul = Html::rawElement(
 919                                         'ul',
 920                                         [ 'class' => 'mw-imagepage-redirectstofile' ],
 921                                         $li
 922                                         ) . "\n";
 923                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )->rawParams(
 924                                         $link, $ul )->parse();
 925                         }
 926                         $out->addHTML( Html::rawElement(
 927                                         'li',
 928                                         [ 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ],
 929                                         $liContents
 930                                 ) . "\n"
 931                         );
 932
 933                 };
 934                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 935                 $res->free();
 936
 937                 // Add a links to [[Special:Whatlinkshere]]
 938                 if ( $count > $limit ) {
 939                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 940                 }
 941                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 942         }
 943
 944         protected function imageDupes() {
 945                 $this->loadFile();
 946                 $out = $this->getContext()->getOutput();
 947
 948                 $dupes = $this->mPage->getDuplicates();
 949                 if ( count( $dupes ) == 0 ) {
 950                         return;
 951                 }
 952
 953                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 954                 $out->addWikiMsg( 'duplicatesoffile',
 955                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 956                 );
 957                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 958
 959                 /**
 960                  * @var $file File
 961                  */
 962                 foreach ( $dupes as $file ) {
 963                         $fromSrc = '';
 964                         if ( $file->isLocal() ) {
 965                                 $link = Linker::linkKnown( $file->getTitle() );
 966                         } else {
 967                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 968                                         $file->getTitle()->getPrefixedText() );
 969                                 $fromSrc = $this->getContext()->msg(
 970                                         'shared-repo-from',
 971                                         $file->getRepo()->getDisplayName()
 972                                 )->escaped();
 973                         }
 974                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 975                 }
 976                 $out->addHTML( "</ul></div>\n" );
 977         }
 978
 979         /**
 980          * Delete the file, or an earlier version of it
 981          */
 982         public function delete() {
 983                 $file = $this->mPage->getFile();
 984                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 985                         // Standard article deletion
 986                         parent::delete();
 987                         return;
 988                 }
 989
 990                 $deleter = new FileDeleteForm( $file );
 991                 $deleter->execute();
 992         }
 993
 994         /**
 995          * Display an error with a wikitext description
 996          *
 997          * @param string $description
 998          */
 999         function showError( $description ) {
1000                 $out = $this->getContext()->getOutput();
1001                 $out->setPageTitle( $this->getContext()->msg( 'internalerror' ) );
1002                 $out->setRobotPolicy( 'noindex,nofollow' );
1003                 $out->setArticleRelated( false );
1004                 $out->enableClientCache( false );
1005                 $out->addWikiText( $description );
1006         }
1007
1008         /**
1009          * Callback for usort() to do link sorts by (namespace, title)
1010          * Function copied from Title::compare()
1011          *
1012          * @param object $a Object page to compare with
1013          * @param object $b Object page to compare with
1014          * @return int Result of string comparison, or namespace comparison
1015          */
1016         protected function compare( $a, $b ) {
1017                 if ( $a->page_namespace == $b->page_namespace ) {
1018                         return strcmp( $a->page_title, $b->page_title );
1019                 } else {
1020                         return $a->page_namespace - $b->page_namespace;
1021                 }
1022         }
1023
1024         /**
1025          * Returns the corresponding $wgImageLimits entry for the selected user option
1026          *
1027          * @param User $user
1028          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
1029          * @return array
1030          * @since 1.21
1031          */
1032         public function getImageLimitsFromOption( $user, $optionName ) {
1033                 global $wgImageLimits;
1034
1035                 $option = $user->getIntOption( $optionName );
1036                 if ( !isset( $wgImageLimits[$option] ) ) {
1037                         $option = User::getDefaultOption( $optionName );
1038                 }
1039
1040                 // The user offset might still be incorrect, specially if
1041                 // $wgImageLimits got changed (see bug #8858).
1042                 if ( !isset( $wgImageLimits[$option] ) ) {
1043                         // Default to the first offset in $wgImageLimits
1044                         $option = 0;
1045                 }
1046
1047                 return isset( $wgImageLimits[$option] )
1048                         ? $wgImageLimits[$option]
1049                         : [ 800, 600 ]; // if nothing is set, fallback to a hardcoded default
1050         }
1051
1052         /**
1053          * Output a drop-down box for language options for the file
1054          *
1055          * @param array $langChoices Array of string language codes
1056          * @param string $renderLang Language code for the language we want the file to rendered in.
1057          * @return string HTML to insert underneath image.
1058          */
1059         protected function doRenderLangOpt( array $langChoices, $renderLang ) {
1060                 global $wgScript;
1061                 $opts = '';
1062
1063                 $matchedRenderLang = $this->displayImg->getMatchedLanguage( $renderLang );
1064
1065                 foreach ( $langChoices as $lang ) {
1066                         $opts .= $this->createXmlOptionStringForLanguage(
1067                                 $lang,
1068                                 $matchedRenderLang === $lang
1069                         );
1070                 }
1071
1072                 // Allow for the default case in an svg <switch> that is displayed if no
1073                 // systemLanguage attribute matches
1074                 $opts .= "\n" .
1075                         Xml::option(
1076                                 $this->getContext()->msg( 'img-lang-default' )->text(),
1077                                 'und',
1078                                 is_null( $matchedRenderLang )
1079                         );
1080
1081                 $select = Html::rawElement(
1082                         'select',
1083                         [ 'id' => 'mw-imglangselector', 'name' => 'lang' ],
1084                         $opts
1085                 );
1086                 $submit = Xml::submitButton( $this->getContext()->msg( 'img-lang-go' )->text() );
1087
1088                 $formContents = $this->getContext()->msg( 'img-lang-info' )
1089                         ->rawParams( $select, $submit )
1090                         ->parse();
1091                 $formContents .= Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() );
1092
1093                 $langSelectLine = Html::rawElement( 'div', [ 'id' => 'mw-imglangselector-line' ],
1094                         Html::rawElement( 'form', [ 'action' => $wgScript ], $formContents )
1095                 );
1096                 return $langSelectLine;
1097         }
1098
1099         /**
1100          * @param $lang string
1101          * @param $selected bool
1102          * @return string
1103          */
1104         private function createXmlOptionStringForLanguage( $lang, $selected ) {
1105                 $code = LanguageCode::bcp47( $lang );
1106                 $name = Language::fetchLanguageName( $code, $this->getContext()->getLanguage()->getCode() );
1107                 if ( $name !== '' ) {
1108                         $display = $this->getContext()->msg( 'img-lang-opt', $code, $name )->text();
1109                 } else {
1110                         $display = $code;
1111                 }
1112                 return "\n" .
1113                         Xml::option(
1114                                 $display,
1115                                 $lang,
1116                                 $selected
1117                         );
1118         }
1119
1120         /**
1121          * Get the width and height to display image at.
1122          *
1123          * @note This method assumes that it is only called if one
1124          *  of the dimensions are bigger than the max, or if the
1125          *  image is vectorized.
1126          *
1127          * @param int $maxWidth Max width to display at
1128          * @param int $maxHeight Max height to display at
1129          * @param int $width Actual width of the image
1130          * @param int $height Actual height of the image
1131          * @throws MWException
1132          * @return array Array (width, height)
1133          */
1134         protected function getDisplayWidthHeight( $maxWidth, $maxHeight, $width, $height ) {
1135                 if ( !$maxWidth || !$maxHeight ) {
1136                         // should never happen
1137                         throw new MWException( 'Using a choice from $wgImageLimits that is 0x0' );
1138                 }
1139
1140                 if ( !$width || !$height ) {
1141                         return [ 0, 0 ];
1142                 }
1143
1144                 # Calculate the thumbnail size.
1145                 if ( $width <= $maxWidth && $height <= $maxHeight ) {
1146                         // Vectorized image, do nothing.
1147                 } elseif ( $width / $height >= $maxWidth / $maxHeight ) {
1148                         # The limiting factor is the width, not the height.
1149                         $height = round( $height * $maxWidth / $width );
1150                         $width = $maxWidth;
1151                         # Note that $height <= $maxHeight now.
1152                 } else {
1153                         $newwidth = floor( $width * $maxHeight / $height );
1154                         $height = round( $height * $newwidth / $width );
1155                         $width = $newwidth;
1156                         # Note that $height <= $maxHeight now, but might not be identical
1157                         # because of rounding.
1158                 }
1159                 return [ $width, $height ];
1160         }
1161
1162         /**
1163          * Get alternative thumbnail sizes.
1164          *
1165          * @note This will only list several alternatives if thumbnails are rendered on 404
1166          * @param int $origWidth Actual width of image
1167          * @param int $origHeight Actual height of image
1168          * @return array An array of [width, height] pairs.
1169          */
1170         protected function getThumbSizes( $origWidth, $origHeight ) {
1171                 global $wgImageLimits;
1172                 if ( $this->displayImg->getRepo()->canTransformVia404() ) {
1173                         $thumbSizes = $wgImageLimits;
1174                         // Also include the full sized resolution in the list, so
1175                         // that users know they can get it. This will link to the
1176                         // original file asset if mustRender() === false. In the case
1177                         // that we mustRender, some users have indicated that they would
1178                         // find it useful to have the full size image in the rendered
1179                         // image format.
1180                         $thumbSizes[] = [ $origWidth, $origHeight ];
1181                 } else {
1182                         # Creating thumb links triggers thumbnail generation.
1183                         # Just generate the thumb for the current users prefs.
1184                         $thumbSizes = [
1185                                 $this->getImageLimitsFromOption( $this->getContext()->getUser(), 'thumbsize' )
1186                         ];
1187                         if ( !$this->displayImg->mustRender() ) {
1188                                 // We can safely include a link to the "full-size" preview,
1189                                 // without actually rendering.
1190                                 $thumbSizes[] = [ $origWidth, $origHeight ];
1191                         }
1192                 }
1193                 return $thumbSizes;
1194         }
1195
1196         /**
1197          * @see WikiFilePage::getFile
1198          * @return bool|File
1199          */
1200         public function getFile() {
1201                 return $this->mPage->getFile();
1202         }
1203
1204         /**
1205          * @see WikiFilePage::isLocal
1206          * @return bool
1207          */
1208         public function isLocal() {
1209                 return $this->mPage->isLocal();
1210         }
1211
1212         /**
1213          * @see WikiFilePage::getDuplicates
1214          * @return array|null
1215          */
1216         public function getDuplicates() {
1217                 return $this->mPage->getDuplicates();
1218         }
1219
1220         /**
1221          * @see WikiFilePage::getForeignCategories
1222          * @return TitleArray|Title[]
1223          */
1224         public function getForeignCategories() {
1225                 $this->mPage->getForeignCategories();
1226         }
1227
1228 }