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();
 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
 224         /**
 225          * @return File
 226          */
 227         public function getDisplayedFile() {
 228                 $this->loadFile();
 229                 return $this->displayImg;
 230         }
 231
 232         /**
 233          * Create the TOC
 234          *
 235          * @param bool $metadata Whether or not to show the metadata link
 236          * @return string
 237          */
 238         protected function showTOC( $metadata ) {
 239                 $r = array(
 240                         '<li><a href="#file">' . $this->getContext()->msg( 'file-anchor-link' )->escaped() . '</a></li>',
 241                         '<li><a href="#filehistory">' . $this->getContext()->msg( 'filehist' )->escaped() . '</a></li>',
 242                         '<li><a href="#filelinks">' . $this->getContext()->msg( 'imagelinks' )->escaped() . '</a></li>',
 243                 );
 244
 245                 Hooks::run( 'ImagePageShowTOC', array( $this, &$r ) );
 246
 247                 if ( $metadata ) {
 248                         $r[] = '<li><a href="#metadata">' . $this->getContext()->msg( 'metadata' )->escaped() . '</a></li>';
 249                 }
 250
 251                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 252         }
 253
 254         /**
 255          * Make a table with metadata to be shown in the output page.
 256          *
 257          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 258          *
 259          * @param array $metadata The array containing the Exif data
 260          * @return string The metadata table. This is treated as Wikitext (!)
 261          */
 262         protected function makeMetadataTable( $metadata ) {
 263                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 264                 $r .= $this->getContext()->msg( 'metadata-help' )->plain();
 265                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 266                 foreach ( $metadata as $type => $stuff ) {
 267                         foreach ( $stuff as $v ) {
 268                                 # @todo FIXME: Why is this using escapeId for a class?!
 269                                 $class = Sanitizer::escapeId( $v['id'] );
 270                                 if ( $type == 'collapsed' ) {
 271                                         // Handled by mediawiki.action.view.metadata module.
 272                                         $class .= ' collapsable';
 273                                 }
 274                                 $r .= "<tr class=\"$class\">\n";
 275                                 $r .= "<th>{$v['name']}</th>\n";
 276                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 277                         }
 278                 }
 279                 $r .= "</table>\n</div>\n";
 280                 return $r;
 281         }
 282
 283         /**
 284          * Overloading Article's getContentObject method.
 285          *
 286          * Omit noarticletext if sharedupload; text will be fetched from the
 287          * shared upload server if possible.
 288          * @return string
 289          */
 290         public function getContentObject() {
 291                 $this->loadFile();
 292                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 293                         return null;
 294                 }
 295                 return parent::getContentObject();
 296         }
 297
 298         protected function openShowImage() {
 299                 global $wgEnableUploads, $wgSend404Code;
 300
 301                 $this->loadFile();
 302                 $out = $this->getContext()->getOutput();
 303                 $user = $this->getContext()->getUser();
 304                 $lang = $this->getContext()->getLanguage();
 305                 $dirmark = $lang->getDirMarkEntity();
 306                 $request = $this->getContext()->getRequest();
 307
 308                 $max = $this->getImageLimitsFromOption( $user, 'imagesize' );
 309                 $maxWidth = $max[0];
 310                 $maxHeight = $max[1];
 311
 312                 if ( $this->displayImg->exists() ) {
 313                         # image
 314                         $page = $request->getIntOrNull( 'page' );
 315                         if ( is_null( $page ) ) {
 316                                 $params = array();
 317                                 $page = 1;
 318                         } else {
 319                                 $params = array( 'page' => $page );
 320                         }
 321
 322                         $renderLang = $request->getVal( 'lang' );
 323                         if ( !is_null( $renderLang ) ) {
 324                                 $handler = $this->displayImg->getHandler();
 325                                 if ( $handler && $handler->validateParam( 'lang', $renderLang ) ) {
 326                                         $params['lang'] = $renderLang;
 327                                 } else {
 328                                         $renderLang = null;
 329                                 }
 330                         }
 331
 332                         $width_orig = $this->displayImg->getWidth( $page );
 333                         $width = $width_orig;
 334                         $height_orig = $this->displayImg->getHeight( $page );
 335                         $height = $height_orig;
 336
 337                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 338                         $linktext = $filename;
 339
 340                         Hooks::run( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 341
 342                         if ( $this->displayImg->allowInlineDisplay() ) {
 343                                 # image
 344                                 # "Download high res version" link below the image
 345                                 # $msgsize = $this->getContext()->msg( 'file-info-size', $width_orig, $height_orig,
 346                                 #   Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 347                                 # We'll show a thumbnail of this image
 348                                 if ( $width > $maxWidth || $height > $maxHeight || $this->displayImg->isVectorized() ) {
 349                                         list( $width, $height ) = $this->getDisplayWidthHeight(
 350                                                 $maxWidth, $maxHeight, $width, $height
 351                                         );
 352                                         $linktext = $this->getContext()->msg( 'show-big-image' )->escaped();
 353
 354                                         $thumbSizes = $this->getThumbSizes( $width, $height, $width_orig, $height_orig );
 355                                         # Generate thumbnails or thumbnail links as needed...
 356                                         $otherSizes = array();
 357                                         foreach ( $thumbSizes as $size ) {
 358                                                 // We include a thumbnail size in the list, if it is
 359                                                 // less than or equal to the original size of the image
 360                                                 // asset ($width_orig/$height_orig). We also exclude
 361                                                 // the current thumbnail's size ($width/$height)
 362                                                 // since that is added to the message separately, so
 363                                                 // it can be denoted as the current size being shown.
 364                                                 // Vectorized images are "infinitely" big, so all thumb
 365                                                 // sizes are shown.
 366                                                 if ( ( ( $size[0] <= $width_orig && $size[1] <= $height_orig )
 367                                                                 || $this->displayImg->isVectorized() )
 368                                                         && $size[0] != $width && $size[1] != $height
 369                                                 ) {
 370                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 371                                                         if ( $sizeLink ) {
 372                                                                 $otherSizes[] = $sizeLink;
 373                                                         }
 374                                                 }
 375                                         }
 376                                         $otherSizes = array_unique( $otherSizes );
 377
 378                                         $msgsmall = '';
 379                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 380                                         if ( $sizeLinkBigImagePreview ) {
 381                                                 $msgsmall .= $this->getContext()->msg( 'show-big-image-preview' )->
 382                                                         rawParams( $sizeLinkBigImagePreview )->
 383                                                         parse();
 384                                         }
 385                                         if ( count( $otherSizes ) ) {
 386                                                 $msgsmall .= ' ' .
 387                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 388                                                         $this->getContext()->msg( 'show-big-image-other' )->rawParams( $lang->pipeList( $otherSizes ) )->
 389                                                         params( count( $otherSizes ) )->parse()
 390                                                 );
 391                                         }
 392                                 } elseif ( $width == 0 && $height == 0 ) {
 393                                         # Some sort of audio file that doesn't have dimensions
 394                                         # Don't output a no hi res message for such a file
 395                                         $msgsmall = '';
 396                                 } else {
 397                                         # Image is small enough to show full size on image page
 398                                         $msgsmall = $this->getContext()->msg( 'file-nohires' )->parse();
 399                                 }
 400
 401                                 $params['width'] = $width;
 402                                 $params['height'] = $height;
 403                                 $thumbnail = $this->displayImg->transform( $params );
 404                                 Linker::processResponsiveImages( $this->displayImg, $thumbnail, $params );
 405
 406                                 $anchorclose = Html::rawElement(
 407                                         'div',
 408                                         array( 'class' => 'mw-filepage-resolutioninfo' ),
 409                                         $msgsmall
 410                                 );
 411
 412                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 413                                 if ( $isMulti ) {
 414                                         $out->addModules( 'mediawiki.page.image.pagination' );
 415                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 416                                 }
 417
 418                                 if ( $thumbnail ) {
 419                                         $options = array(
 420                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 421                                                 'file-link' => true,
 422                                         );
 423                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 424                                                 $thumbnail->toHtml( $options ) .
 425                                                 $anchorclose . "</div>\n" );
 426                                 }
 427
 428                                 if ( $isMulti ) {
 429                                         $count = $this->displayImg->pageCount();
 430
 431                                         if ( $page > 1 ) {
 432                                                 $label = $out->parse( $this->getContext()->msg( 'imgmultipageprev' )->text(), false );
 433                                                 // on the client side, this link is generated in ajaxifyPageNavigation()
 434                                                 // in the mediawiki.page.image.pagination module
 435                                                 $link = Linker::linkKnown(
 436                                                         $this->getTitle(),
 437                                                         $label,
 438                                                         array(),
 439                                                         array( 'page' => $page - 1 )
 440                                                 );
 441                                                 $thumb1 = Linker::makeThumbLinkObj(
 442                                                         $this->getTitle(),
 443                                                         $this->displayImg,
 444                                                         $link,
 445                                                         $label,
 446                                                         'none',
 447                                                         array( 'page' => $page - 1 )
 448                                                 );
 449                                         } else {
 450                                                 $thumb1 = '';
 451                                         }
 452
 453                                         if ( $page < $count ) {
 454                                                 $label = $this->getContext()->msg( 'imgmultipagenext' )->text();
 455                                                 $link = Linker::linkKnown(
 456                                                         $this->getTitle(),
 457                                                         $label,
 458                                                         array(),
 459                                                         array( 'page' => $page + 1 )
 460                                                 );
 461                                                 $thumb2 = Linker::makeThumbLinkObj(
 462                                                         $this->getTitle(),
 463                                                         $this->displayImg,
 464                                                         $link,
 465                                                         $label,
 466                                                         'none',
 467                                                         array( 'page' => $page + 1 )
 468                                                 );
 469                                         } else {
 470                                                 $thumb2 = '';
 471                                         }
 472
 473                                         global $wgScript;
 474
 475                                         $formParams = array(
 476                                                 'name' => 'pageselector',
 477                                                 'action' => $wgScript,
 478                                         );
 479                                         $options = array();
 480                                         for ( $i = 1; $i <= $count; $i++ ) {
 481                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 482                                         }
 483                                         $select = Xml::tags( 'select',
 484                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 485                                                 implode( "\n", $options ) );
 486
 487                                         $out->addHTML(
 488                                                 '</td><td><div class="multipageimagenavbox">' .
 489                                                 Xml::openElement( 'form', $formParams ) .
 490                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 491                                                 $this->getContext()->msg( 'imgmultigoto' )->rawParams( $select )->parse() .
 492                                                 Xml::submitButton( $this->getContext()->msg( 'imgmultigo' )->text() ) .
 493                                                 Xml::closeElement( 'form' ) .
 494                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 495                                         );
 496                                 }
 497                         } elseif ( $this->displayImg->isSafeFile() ) {
 498                                 # if direct link is allowed but it's not a renderable image, show an icon.
 499                                 $icon = $this->displayImg->iconThumb();
 500
 501                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 502                                         $icon->toHtml( array( 'file-link' => true ) ) .
 503                                         "</div>\n" );
 504                         }
 505
 506                         $longDesc = $this->getContext()->msg( 'parentheses', $this->displayImg->getLongDesc() )->text();
 507
 508                         $medialink = "[[Media:$filename|$linktext]]";
 509
 510                         if ( !$this->displayImg->isSafeFile() ) {
 511                                 $warning = $this->getContext()->msg( 'mediawarning' )->plain();
 512                                 // dirmark is needed here to separate the file name, which
 513                                 // most likely ends in Latin characters, from the description,
 514                                 // which may begin with the file type. In RTL environment
 515                                 // this will get messy.
 516                                 // The dirmark, however, must not be immediately adjacent
 517                                 // to the filename, because it can get copied with it.
 518                                 // See bug 25277.
 519                                 // @codingStandardsIgnoreStart Ignore long line
 520                                 $out->addWikiText( <<<EOT
 521 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 522 <div class="mediaWarning">$warning</div>
 523 EOT
 524                                 );
 525                                 // @codingStandardsIgnoreEnd
 526                         } else {
 527                                 $out->addWikiText( <<<EOT
 528 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 529 </div>
 530 EOT
 531                                 );
 532                         }
 533
 534                         $renderLangOptions = $this->displayImg->getAvailableLanguages();
 535                         if ( count( $renderLangOptions ) >= 1 ) {
 536                                 $currentLanguage = $renderLang;
 537                                 $defaultLang = $this->displayImg->getDefaultRenderLanguage();
 538                                 if ( is_null( $currentLanguage ) ) {
 539                                         $currentLanguage = $defaultLang;
 540                                 }
 541                                 $out->addHtml( $this->doRenderLangOpt( $renderLangOptions, $currentLanguage, $defaultLang ) );
 542                         }
 543
 544                         // Add cannot animate thumbnail warning
 545                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 546                                 // Include the extension so wiki admins can
 547                                 // customize it on a per file-type basis
 548                                 // (aka say things like use format X instead).
 549                                 // additionally have a specific message for
 550                                 // file-no-thumb-animation-gif
 551                                 $ext = $this->displayImg->getExtension();
 552                                 $noAnimMesg = wfMessageFallback(
 553                                         'file-no-thumb-animation-' . $ext,
 554                                         'file-no-thumb-animation'
 555                                 )->plain();
 556
 557                                 $out->addWikiText( <<<EOT
 558 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 559 EOT
 560                                 );
 561                         }
 562
 563                         if ( !$this->displayImg->isLocal() ) {
 564                                 $this->printSharedImageText();
 565                         }
 566                 } else {
 567                         # Image does not exist
 568                         if ( !$this->getID() ) {
 569                                 # No article exists either
 570                                 # Show deletion log to be consistent with normal articles
 571                                 LogEventsList::showLogExtract(
 572                                         $out,
 573                                         array( 'delete', 'move' ),
 574                                         $this->getTitle()->getPrefixedText(),
 575                                         '',
 576                                         array( 'lim' => 10,
 577                                                 'conds' => array( "log_action != 'revision'" ),
 578                                                 'showIfEmpty' => false,
 579                                                 'msgKey' => array( 'moveddeleted-notice' )
 580                                         )
 581                                 );
 582                         }
 583
 584                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 585                                 // Only show an upload link if the user can upload
 586                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 587                                 $nofile = array(
 588                                         'filepage-nofile-link',
 589                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 590                                 );
 591                         } else {
 592                                 $nofile = 'filepage-nofile';
 593                         }
 594                         // Note, if there is an image description page, but
 595                         // no image, then this setRobotPolicy is overridden
 596                         // by Article::View().
 597                         $out->setRobotPolicy( 'noindex,nofollow' );
 598                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 599                         if ( !$this->getID() && $wgSend404Code ) {
 600                                 // If there is no image, no shared image, and no description page,
 601                                 // output a 404, to be consistent with articles.
 602                                 $request->response()->header( 'HTTP/1.1 404 Not Found' );
 603                         }
 604                 }
 605                 $out->setFileVersion( $this->displayImg );
 606         }
 607
 608         /**
 609          * Creates an thumbnail of specified size and returns an HTML link to it
 610          * @param array $params Scaler parameters
 611          * @param int $width
 612          * @param int $height
 613          * @return string
 614          */
 615         private function makeSizeLink( $params, $width, $height ) {
 616                 $params['width'] = $width;
 617                 $params['height'] = $height;
 618                 $thumbnail = $this->displayImg->transform( $params );
 619                 if ( $thumbnail && !$thumbnail->isError() ) {
 620                         return Html::rawElement( 'a', array(
 621                                 'href' => $thumbnail->getUrl(),
 622                                 'class' => 'mw-thumbnail-link'
 623                                 ), $this->getContext()->msg( 'show-big-image-size' )->numParams(
 624                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 625                                 )->parse() );
 626                 } else {
 627                         return '';
 628                 }
 629         }
 630
 631         /**
 632          * Show a notice that the file is from a shared repository
 633          */
 634         protected function printSharedImageText() {
 635                 $out = $this->getContext()->getOutput();
 636                 $this->loadFile();
 637
 638                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 639                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 640
 641                 /* Add canonical to head if there is no local page for this shared file */
 642                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 643                         $out->setCanonicalUrl( $descUrl );
 644                 }
 645
 646                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 647                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 648
 649                 if ( $descUrl && $descText && $this->getContext()->msg( 'sharedupload-desc-here' )->plain() !== '-' ) {
 650                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 651                 } elseif ( $descUrl && $this->getContext()->msg( 'sharedupload-desc-there' )->plain() !== '-' ) {
 652                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 653                 } else {
 654                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 655                 }
 656
 657                 if ( $descText ) {
 658                         $this->mExtraDescription = $descText;
 659                 }
 660         }
 661
 662         public function getUploadUrl() {
 663                 $this->loadFile();
 664                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 665                 return $uploadTitle->getFullURL( array(
 666                         'wpDestFile' => $this->mPage->getFile()->getName(),
 667                         'wpForReUpload' => 1
 668                 ) );
 669         }
 670
 671         /**
 672          * Print out the various links at the bottom of the image page, e.g. reupload,
 673          * external editing (and instructions link) etc.
 674          */
 675         protected function uploadLinksBox() {
 676                 global $wgEnableUploads;
 677
 678                 if ( !$wgEnableUploads ) {
 679                         return;
 680                 }
 681
 682                 $this->loadFile();
 683                 if ( !$this->mPage->getFile()->isLocal() ) {
 684                         return;
 685                 }
 686
 687                 $out = $this->getContext()->getOutput();
 688                 $out->addHTML( "<ul>\n" );
 689
 690                 # "Upload a new version of this file" link
 691                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 692                 if ( $canUpload && UploadBase::userCanReUpload(
 693                                 $this->getContext()->getUser(),
 694                                 $this->mPage->getFile()->name )
 695                 ) {
 696                         $ulink = Linker::makeExternalLink(
 697                                 $this->getUploadUrl(),
 698                                 $this->getContext()->msg( 'uploadnewversion-linktext' )->text()
 699                         );
 700                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\">"
 701                                 . "<div class=\"plainlinks\">{$ulink}</div></li>\n" );
 702                 } else {
 703                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">"
 704                                 . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 705                 }
 706
 707                 $out->addHTML( "</ul>\n" );
 708         }
 709
 710         /**
 711          * For overloading
 712          */
 713         protected function closeShowImage() {
 714         }
 715
 716         /**
 717          * If the page we've just displayed is in the "Image" namespace,
 718          * we follow it with an upload history of the image and its usage.
 719          */
 720         protected function imageHistory() {
 721                 $this->loadFile();
 722                 $out = $this->getContext()->getOutput();
 723                 $pager = new ImageHistoryPseudoPager( $this );
 724                 $out->addHTML( $pager->getBody() );
 725                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 726
 727                 $this->mPage->getFile()->resetHistory(); // free db resources
 728
 729                 # Exist check because we don't want to show this on pages where an image
 730                 # doesn't exist along with the noimage message, that would suck. -ævar
 731                 if ( $this->mPage->getFile()->exists() ) {
 732                         $this->uploadLinksBox();
 733                 }
 734         }
 735
 736         /**
 737          * @param string $target
 738          * @param int $limit
 739          * @return ResultWrapper
 740          */
 741         protected function queryImageLinks( $target, $limit ) {
 742                 $dbr = wfGetDB( DB_SLAVE );
 743
 744                 return $dbr->select(
 745                         array( 'imagelinks', 'page' ),
 746                         array( 'page_namespace', 'page_title', 'il_to' ),
 747                         array( 'il_to' => $target, 'il_from = page_id' ),
 748                         __METHOD__,
 749                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 750                 );
 751         }
 752
 753         protected function imageLinks() {
 754                 $limit = 100;
 755
 756                 $out = $this->getContext()->getOutput();
 757
 758                 $rows = array();
 759                 $redirects = array();
 760                 foreach ( $this->getTitle()->getRedirectsHere( NS_FILE ) as $redir ) {
 761                         $redirects[$redir->getDBkey()] = array();
 762                         $rows[] = (object)array(
 763                                 'page_namespace' => NS_FILE,
 764                                 'page_title' => $redir->getDBkey(),
 765                         );
 766                 }
 767
 768                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 769                 foreach ( $res as $row ) {
 770                         $rows[] = $row;
 771                 }
 772                 $count = count( $rows );
 773
 774                 $hasMore = $count > $limit;
 775                 if ( !$hasMore && count( $redirects ) ) {
 776                         $res = $this->queryImageLinks( array_keys( $redirects ),
 777                                 $limit - count( $rows ) + 1 );
 778                         foreach ( $res as $row ) {
 779                                 $redirects[$row->il_to][] = $row;
 780                                 $count++;
 781                         }
 782                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 783                 }
 784
 785                 if ( $count == 0 ) {
 786                         $out->wrapWikiMsg(
 787                                 Html::rawElement( 'div',
 788                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 789                                 'nolinkstoimage'
 790                         );
 791                         return;
 792                 }
 793
 794                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 795                 if ( !$hasMore ) {
 796                         $out->addWikiMsg( 'linkstoimage', $count );
 797                 } else {
 798                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 799                         $out->addWikiMsg( 'linkstoimage-more',
 800                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 801                                 $this->getTitle()->getPrefixedDBkey()
 802                         );
 803                 }
 804
 805                 $out->addHTML(
 806                         Html::openElement( 'ul',
 807                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 808                 );
 809                 $count = 0;
 810
 811                 // Sort the list by namespace:title
 812                 usort( $rows, array( $this, 'compare' ) );
 813
 814                 // Create links for every element
 815                 $currentCount = 0;
 816                 foreach ( $rows as $element ) {
 817                         $currentCount++;
 818                         if ( $currentCount > $limit ) {
 819                                 break;
 820                         }
 821
 822                         $query = array();
 823                         # Add a redirect=no to make redirect pages reachable
 824                         if ( isset( $redirects[$element->page_title] ) ) {
 825                                 $query['redirect'] = 'no';
 826                         }
 827                         $link = Linker::linkKnown(
 828                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 829                                 null, array(), $query
 830                         );
 831                         if ( !isset( $redirects[$element->page_title] ) ) {
 832                                 # No redirects
 833                                 $liContents = $link;
 834                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 835                                 # Redirect without usages
 836                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 837                         } else {
 838                                 # Redirect with usages
 839                                 $li = '';
 840                                 foreach ( $redirects[$element->page_title] as $row ) {
 841                                         $currentCount++;
 842                                         if ( $currentCount > $limit ) {
 843                                                 break;
 844                                         }
 845
 846                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 847                                         $li .= Html::rawElement(
 848                                                 'li',
 849                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 850                                                 $link2
 851                                                 ) . "\n";
 852                                 }
 853
 854                                 $ul = Html::rawElement(
 855                                         'ul',
 856                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 857                                         $li
 858                                         ) . "\n";
 859                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )->rawParams(
 860                                         $link, $ul )->parse();
 861                         }
 862                         $out->addHTML( Html::rawElement(
 863                                         'li',
 864                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 865                                         $liContents
 866                                 ) . "\n"
 867                         );
 868
 869                 };
 870                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 871                 $res->free();
 872
 873                 // Add a links to [[Special:Whatlinkshere]]
 874                 if ( $count > $limit ) {
 875                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 876                 }
 877                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 878         }
 879
 880         protected function imageDupes() {
 881                 $this->loadFile();
 882                 $out = $this->getContext()->getOutput();
 883
 884                 $dupes = $this->mPage->getDuplicates();
 885                 if ( count( $dupes ) == 0 ) {
 886                         return;
 887                 }
 888
 889                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 890                 $out->addWikiMsg( 'duplicatesoffile',
 891                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 892                 );
 893                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 894
 895                 /**
 896                  * @var $file File
 897                  */
 898                 foreach ( $dupes as $file ) {
 899                         $fromSrc = '';
 900                         if ( $file->isLocal() ) {
 901                                 $link = Linker::linkKnown( $file->getTitle() );
 902                         } else {
 903                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 904                                         $file->getTitle()->getPrefixedText() );
 905                                 $fromSrc = $this->getContext()->msg( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 906                         }
 907                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 908                 }
 909                 $out->addHTML( "</ul></div>\n" );
 910         }
 911
 912         /**
 913          * Delete the file, or an earlier version of it
 914          */
 915         public function delete() {
 916                 $file = $this->mPage->getFile();
 917                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 918                         // Standard article deletion
 919                         parent::delete();
 920                         return;
 921                 }
 922
 923                 $deleter = new FileDeleteForm( $file );
 924                 $deleter->execute();
 925         }
 926
 927         /**
 928          * Display an error with a wikitext description
 929          *
 930          * @param string $description
 931          */
 932         function showError( $description ) {
 933                 $out = $this->getContext()->getOutput();
 934                 $out->setPageTitle( $this->getContext()->msg( 'internalerror' ) );
 935                 $out->setRobotPolicy( 'noindex,nofollow' );
 936                 $out->setArticleRelated( false );
 937                 $out->enableClientCache( false );
 938                 $out->addWikiText( $description );
 939         }
 940
 941         /**
 942          * Callback for usort() to do link sorts by (namespace, title)
 943          * Function copied from Title::compare()
 944          *
 945          * @param object $a Object page to compare with
 946          * @param object $b Object page to compare with
 947          * @return int Result of string comparison, or namespace comparison
 948          */
 949         protected function compare( $a, $b ) {
 950                 if ( $a->page_namespace == $b->page_namespace ) {
 951                         return strcmp( $a->page_title, $b->page_title );
 952                 } else {
 953                         return $a->page_namespace - $b->page_namespace;
 954                 }
 955         }
 956
 957         /**
 958          * Returns the corresponding $wgImageLimits entry for the selected user option
 959          *
 960          * @param User $user
 961          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 962          * @return array
 963          * @since 1.21
 964          */
 965         public function getImageLimitsFromOption( $user, $optionName ) {
 966                 global $wgImageLimits;
 967
 968                 $option = $user->getIntOption( $optionName );
 969                 if ( !isset( $wgImageLimits[$option] ) ) {
 970                         $option = User::getDefaultOption( $optionName );
 971                 }
 972
 973                 // The user offset might still be incorrect, specially if
 974                 // $wgImageLimits got changed (see bug #8858).
 975                 if ( !isset( $wgImageLimits[$option] ) ) {
 976                         // Default to the first offset in $wgImageLimits
 977                         $option = 0;
 978                 }
 979
 980                 return isset( $wgImageLimits[$option] )
 981                         ? $wgImageLimits[$option]
 982                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
 983         }
 984
 985         /**
 986          * Output a drop-down box for language options for the file
 987          *
 988          * @param array $langChoices Array of string language codes
 989          * @param string $curLang Language code file is being viewed in.
 990          * @param string $defaultLang Language code that image is rendered in by default
 991          * @return string HTML to insert underneath image.
 992          */
 993         protected function doRenderLangOpt( array $langChoices, $curLang, $defaultLang ) {
 994                 global $wgScript;
 995                 sort( $langChoices );
 996                 $curLang = wfBCP47( $curLang );
 997                 $defaultLang = wfBCP47( $defaultLang );
 998                 $opts = '';
 999                 $haveCurrentLang = false;
1000                 $haveDefaultLang = false;
1001
1002                 // We make a list of all the language choices in the file.
1003                 // Additionally if the default language to render this file
1004                 // is not included as being in this file (for example, in svgs
1005                 // usually the fallback content is the english content) also
1006                 // include a choice for that. Last of all, if we're viewing
1007                 // the file in a language not on the list, add it as a choice.
1008                 foreach ( $langChoices as $lang ) {
1009                         $code = wfBCP47( $lang );
1010                         $name = Language::fetchLanguageName( $code, $this->getContext()->getLanguage()->getCode() );
1011                         if ( $name !== '' ) {
1012                                 $display = $this->getContext()->msg( 'img-lang-opt', $code, $name )->text();
1013                         } else {
1014                                 $display = $code;
1015                         }
1016                         $opts .= "\n" . Xml::option( $display, $code, $curLang === $code );
1017                         if ( $curLang === $code ) {
1018                                 $haveCurrentLang = true;
1019                         }
1020                         if ( $defaultLang === $code ) {
1021                                 $haveDefaultLang = true;
1022                         }
1023                 }
1024                 if ( !$haveDefaultLang ) {
1025                         // Its hard to know if the content is really in the default language, or
1026                         // if its just unmarked content that could be in any language.
1027                         $opts = Xml::option(
1028                                         $this->getContext()->msg( 'img-lang-default' )->text(),
1029                                 $defaultLang,
1030                                 $defaultLang === $curLang
1031                         ) . $opts;
1032                 }
1033                 if ( !$haveCurrentLang && $defaultLang !== $curLang ) {
1034                         $name = Language::fetchLanguageName( $curLang, $this->getContext()->getLanguage()->getCode() );
1035                         if ( $name !== '' ) {
1036                                 $display = $this->getContext()->msg( 'img-lang-opt', $curLang, $name )->text();
1037                         } else {
1038                                 $display = $curLang;
1039                         }
1040                         $opts = Xml::option( $display, $curLang, true ) . $opts;
1041                 }
1042
1043                 $select = Html::rawElement(
1044                         'select',
1045                         array( 'id' => 'mw-imglangselector', 'name' => 'lang' ),
1046                         $opts
1047                 );
1048                 $submit = Xml::submitButton( $this->getContext()->msg( 'img-lang-go' )->text() );
1049
1050                 $formContents = $this->getContext()->msg( 'img-lang-info' )->rawParams( $select, $submit )->parse()
1051                         . Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() );
1052
1053                 $langSelectLine = Html::rawElement( 'div', array( 'id' => 'mw-imglangselector-line' ),
1054                         Html::rawElement( 'form', array( 'action' => $wgScript ), $formContents )
1055                 );
1056                 return $langSelectLine;
1057         }
1058
1059         /**
1060          * Get the width and height to display image at.
1061          *
1062          * @note This method assumes that it is only called if one
1063          *  of the dimensions are bigger than the max, or if the
1064          *  image is vectorized.
1065          *
1066          * @param int $maxWidth Max width to display at
1067          * @param int $maxHeight Max height to display at
1068          * @param int $width Actual width of the image
1069          * @param int $height Actual height of the image
1070          * @throws MWException
1071          * @return array Array (width, height)
1072          */
1073         protected function getDisplayWidthHeight( $maxWidth, $maxHeight, $width, $height ) {
1074                 if ( !$maxWidth || !$maxHeight ) {
1075                         // should never happen
1076                         throw new MWException( 'Using a choice from $wgImageLimits that is 0x0' );
1077                 }
1078
1079                 if ( !$width || !$height ) {
1080                         return array( 0, 0 );
1081                 }
1082
1083                 # Calculate the thumbnail size.
1084                 if ( $width <= $maxWidth && $height <= $maxHeight ) {
1085                         // Vectorized image, do nothing.
1086                 } elseif ( $width / $height >= $maxWidth / $maxHeight ) {
1087                         # The limiting factor is the width, not the height.
1088                         $height = round( $height * $maxWidth / $width );
1089                         $width = $maxWidth;
1090                         # Note that $height <= $maxHeight now.
1091                 } else {
1092                         $newwidth = floor( $width * $maxHeight / $height );
1093                         $height = round( $height * $newwidth / $width );
1094                         $width = $newwidth;
1095                         # Note that $height <= $maxHeight now, but might not be identical
1096                         # because of rounding.
1097                 }
1098                 return array( $width, $height );
1099         }
1100
1101         /**
1102          * Get alternative thumbnail sizes.
1103          *
1104          * @note This will only list several alternatives if thumbnails are rendered on 404
1105          * @param int $origWidth Actual width of image
1106          * @param int $origHeight Actual height of image
1107          * @return array An array of [width, height] pairs.
1108          */
1109         protected function getThumbSizes( $origWidth, $origHeight ) {
1110                 global $wgImageLimits;
1111                 if ( $this->displayImg->getRepo()->canTransformVia404() ) {
1112                         $thumbSizes = $wgImageLimits;
1113                         // Also include the full sized resolution in the list, so
1114                         // that users know they can get it. This will link to the
1115                         // original file asset if mustRender() === false. In the case
1116                         // that we mustRender, some users have indicated that they would
1117                         // find it useful to have the full size image in the rendered
1118                         // image format.
1119                         $thumbSizes[] = array( $origWidth, $origHeight );
1120                 } else {
1121                         # Creating thumb links triggers thumbnail generation.
1122                         # Just generate the thumb for the current users prefs.
1123                         $thumbSizes = array( $this->getImageLimitsFromOption( $this->getContext()->getUser(), 'thumbsize' ) );
1124                         if ( !$this->displayImg->mustRender() ) {
1125                                 // We can safely include a link to the "full-size" preview,
1126                                 // without actually rendering.
1127                                 $thumbSizes[] = array( $origWidth, $origHeight );
1128                         }
1129                 }
1130                 return $thumbSizes;
1131         }
1132
1133 }
1134
1135 /**
1136  * Builds the image revision log shown on image pages
1137  *
1138  * @ingroup Media
1139  */
1140 class ImageHistoryList extends ContextSource {
1141
1142         /**
1143          * @var Title
1144          */
1145         protected $title;
1146
1147         /**
1148          * @var File
1149          */
1150         protected $img;
1151
1152         /**
1153          * @var ImagePage
1154          */
1155         protected $imagePage;
1156
1157         /**
1158          * @var File
1159          */
1160         protected $current;
1161
1162         protected $repo, $showThumb;
1163         protected $preventClickjacking = false;
1164
1165         /**
1166          * @param ImagePage $imagePage
1167          */
1168         public function __construct( $imagePage ) {
1169                 global $wgShowArchiveThumbnails;
1170                 $this->current = $imagePage->getFile();
1171                 $this->img = $imagePage->getDisplayedFile();
1172                 $this->title = $imagePage->getTitle();
1173                 $this->imagePage = $imagePage;
1174                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
1175                 $this->setContext( $imagePage->getContext() );
1176         }
1177
1178         /**
1179          * @return ImagePage
1180          */
1181         public function getImagePage() {
1182                 return $this->imagePage;
1183         }
1184
1185         /**
1186          * @return File
1187          */
1188         public function getFile() {
1189                 return $this->img;
1190         }
1191
1192         /**
1193          * @param string $navLinks
1194          * @return string
1195          */
1196         public function beginImageHistoryList( $navLinks = '' ) {
1197                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() )
1198                         . "\n"
1199                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1200                         . $this->msg( 'filehist-help' )->parseAsBlock()
1201                         . $navLinks . "\n"
1202                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1203                         . '<tr><th></th>'
1204                         . ( $this->current->isLocal()
1205                                 && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<th></th>' : '' )
1206                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1207                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1208                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1209                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1210                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1211                         . "</tr>\n";
1212         }
1213
1214         /**
1215          * @param string $navLinks
1216          * @return string
1217          */
1218         public function endImageHistoryList( $navLinks = '' ) {
1219                 return "</table>\n$navLinks\n</div>\n";
1220         }
1221
1222         /**
1223          * @param bool $iscur
1224          * @param File $file
1225          * @return string
1226          */
1227         public function imageHistoryLine( $iscur, $file ) {
1228                 global $wgContLang;
1229
1230                 $user = $this->getUser();
1231                 $lang = $this->getLanguage();
1232                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1233                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1234                 $userId = $file->getUser( 'id' );
1235                 $userText = $file->getUser( 'text' );
1236                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1237
1238                 $local = $this->current->isLocal();
1239                 $row = $selected = '';
1240
1241                 // Deletion link
1242                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1243                         $row .= '<td>';
1244                         # Link to remove from history
1245                         if ( $user->isAllowed( 'delete' ) ) {
1246                                 $q = array( 'action' => 'delete' );
1247                                 if ( !$iscur ) {
1248                                         $q['oldimage'] = $img;
1249                                 }
1250                                 $row .= Linker::linkKnown(
1251                                         $this->title,
1252                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1253                                         array(), $q
1254                                 );
1255                         }
1256                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1257                         $canHide = $user->isAllowed( 'deleterevision' );
1258                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1259                                 if ( $user->isAllowed( 'delete' ) ) {
1260                                         $row .= '<br />';
1261                                 }
1262                                 // If file is top revision or locked from this user, don't link
1263                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1264                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1265                                 } else {
1266                                         list( $ts, ) = explode( '!', $img, 2 );
1267                                         $query = array(
1268                                                 'type' => 'oldimage',
1269                                                 'target' => $this->title->getPrefixedText(),
1270                                                 'ids' => $ts,
1271                                         );
1272                                         $del = Linker::revDeleteLink( $query,
1273                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1274                                 }
1275                                 $row .= $del;
1276                         }
1277                         $row .= '</td>';
1278                 }
1279
1280                 // Reversion link/current indicator
1281                 $row .= '<td>';
1282                 if ( $iscur ) {
1283                         $row .= $this->msg( 'filehist-current' )->escaped();
1284                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1285                         && $this->title->quickUserCan( 'upload', $user )
1286                 ) {
1287                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1288                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1289                         } else {
1290                                 $row .= Linker::linkKnown(
1291                                         $this->title,
1292                                         $this->msg( 'filehist-revert' )->escaped(),
1293                                         array(),
1294                                         array(
1295                                                 'action' => 'revert',
1296                                                 'oldimage' => $img,
1297                                                 'wpEditToken' => $user->getEditToken( $img )
1298                                         )
1299                                 );
1300                         }
1301                 }
1302                 $row .= '</td>';
1303
1304                 // Date/time and image link
1305                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1306                         $selected = "class='filehistory-selected'";
1307                 }
1308                 $row .= "<td $selected style='white-space: nowrap;'>";
1309                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1310                         # Don't link to unviewable files
1311                         $row .= '<span class="history-deleted">'
1312                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1313                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1314                         if ( $local ) {
1315                                 $this->preventClickjacking();
1316                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1317                                 # Make a link to review the image
1318                                 $url = Linker::linkKnown(
1319                                         $revdel,
1320                                         $lang->userTimeAndDate( $timestamp, $user ),
1321                                         array(),
1322                                         array(
1323                                                 'target' => $this->title->getPrefixedText(),
1324                                                 'file' => $img,
1325                                                 'token' => $user->getEditToken( $img )
1326                                         )
1327                                 );
1328                         } else {
1329                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1330                         }
1331                         $row .= '<span class="history-deleted">' . $url . '</span>';
1332                 } elseif ( !$file->exists() ) {
1333                         $row .= '<span class="mw-file-missing">'
1334                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1335                 } else {
1336                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1337                         $row .= Xml::element(
1338                                 'a',
1339                                 array( 'href' => $url ),
1340                                 $lang->userTimeAndDate( $timestamp, $user )
1341                         );
1342                 }
1343                 $row .= "</td>";
1344
1345                 // Thumbnail
1346                 if ( $this->showThumb ) {
1347                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1348                 }
1349
1350                 // Image dimensions + size
1351                 $row .= '<td>';
1352                 $row .= htmlspecialchars( $file->getDimensionsString() );
1353                 $row .= $this->msg( 'word-separator' )->escaped();
1354                 $row .= '<span style="white-space: nowrap;">';
1355                 $row .= $this->msg( 'parentheses' )->sizeParams( $file->getSize() )->escaped();
1356                 $row .= '</span>';
1357                 $row .= '</td>';
1358
1359                 // Uploading user
1360                 $row .= '<td>';
1361                 // Hide deleted usernames
1362                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1363                         $row .= '<span class="history-deleted">'
1364                                 . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1365                 } else {
1366                         if ( $local ) {
1367                                 $row .= Linker::userLink( $userId, $userText );
1368                                 $row .= $this->msg( 'word-separator' )->escaped();
1369                                 $row .= '<span style="white-space: nowrap;">';
1370                                 $row .= Linker::userToolLinks( $userId, $userText );
1371                                 $row .= '</span>';
1372                         } else {
1373                                 $row .= htmlspecialchars( $userText );
1374                         }
1375                 }
1376                 $row .= '</td>';
1377
1378                 // Don't show deleted descriptions
1379                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1380                         $row .= '<td><span class="history-deleted">' .
1381                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1382                 } else {
1383                         $row .= '<td dir="' . $wgContLang->getDir() . '">' .
1384                                 Linker::formatComment( $description, $this->title ) . '</td>';
1385                 }
1386
1387                 $rowClass = null;
1388                 Hooks::run( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1389                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1390
1391                 return "<tr{$classAttr}>{$row}</tr>\n";
1392         }
1393
1394         /**
1395          * @param File $file
1396          * @return string
1397          */
1398         protected function getThumbForLine( $file ) {
1399                 $lang = $this->getLanguage();
1400                 $user = $this->getUser();
1401                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1402                         && !$file->isDeleted( File::DELETED_FILE )
1403                 ) {
1404                         $params = array(
1405                                 'width' => '120',
1406                                 'height' => '120',
1407                         );
1408                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1409
1410                         $thumbnail = $file->transform( $params );
1411                         $options = array(
1412                                 'alt' => $this->msg( 'filehist-thumbtext',
1413                                         $lang->userTimeAndDate( $timestamp, $user ),
1414                                         $lang->userDate( $timestamp, $user ),
1415                                         $lang->userTime( $timestamp, $user ) )->text(),
1416                                 'file-link' => true,
1417                         );
1418
1419                         if ( !$thumbnail ) {
1420                                 return $this->msg( 'filehist-nothumb' )->escaped();
1421                         }
1422
1423                         return $thumbnail->toHtml( $options );
1424                 } else {
1425                         return $this->msg( 'filehist-nothumb' )->escaped();
1426                 }
1427         }
1428
1429         /**
1430          * @param bool $enable
1431          */
1432         protected function preventClickjacking( $enable = true ) {
1433                 $this->preventClickjacking = $enable;
1434         }
1435
1436         /**
1437          * @return bool
1438          */
1439         public function getPreventClickjacking() {
1440                 return $this->preventClickjacking;
1441         }
1442 }
1443
1444 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1445         protected $preventClickjacking = false;
1446
1447         /**
1448          * @var File
1449          */
1450         protected $mImg;
1451
1452         /**
1453          * @var Title
1454          */
1455         protected $mTitle;
1456
1457         /**
1458          * @param ImagePage $imagePage
1459          */
1460         function __construct( $imagePage ) {
1461                 parent::__construct( $imagePage->getContext() );
1462                 $this->mImagePage = $imagePage;
1463                 $this->mTitle = clone ( $imagePage->getTitle() );
1464                 $this->mTitle->setFragment( '#filehistory' );
1465                 $this->mImg = null;
1466                 $this->mHist = array();
1467                 $this->mRange = array( 0, 0 ); // display range
1468         }
1469
1470         /**
1471          * @return Title
1472          */
1473         function getTitle() {
1474                 return $this->mTitle;
1475         }
1476
1477         function getQueryInfo() {
1478                 return false;
1479         }
1480
1481         /**
1482          * @return string
1483          */
1484         function getIndexField() {
1485                 return '';
1486         }
1487
1488         /**
1489          * @param object $row
1490          * @return string
1491          */
1492         function formatRow( $row ) {
1493                 return '';
1494         }
1495
1496         /**
1497          * @return string
1498          */
1499         function getBody() {
1500                 $s = '';
1501                 $this->doQuery();
1502                 if ( count( $this->mHist ) ) {
1503                         $list = new ImageHistoryList( $this->mImagePage );
1504                         # Generate prev/next links
1505                         $navLink = $this->getNavigationBar();
1506                         $s = $list->beginImageHistoryList( $navLink );
1507                         // Skip rows there just for paging links
1508                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1509                                 $file = $this->mHist[$i];
1510                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1511                         }
1512                         $s .= $list->endImageHistoryList( $navLink );
1513
1514                         if ( $list->getPreventClickjacking() ) {
1515                                 $this->preventClickjacking();
1516                         }
1517                 }
1518                 return $s;
1519         }
1520
1521         function doQuery() {
1522                 if ( $this->mQueryDone ) {
1523                         return;
1524                 }
1525                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1526                 if ( !$this->mImg->exists() ) {
1527                         return;
1528                 }
1529                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1530                 if ( $this->mIsBackwards ) {
1531                         // Fetch the file history
1532                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1533                         // The current rev may not meet the offset/limit
1534                         $numRows = count( $this->mHist );
1535                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1536                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1537                         }
1538                 } else {
1539                         // The current rev may not meet the offset
1540                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1541                                 $this->mHist[] = $this->mImg;
1542                         }
1543                         // Old image versions (fetch extra row for nav links)
1544                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1545                         // Fetch the file history
1546                         $this->mHist = array_merge( $this->mHist,
1547                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1548                 }
1549                 $numRows = count( $this->mHist ); // Total number of query results
1550                 if ( $numRows ) {
1551                         # Index value of top item in the list
1552                         $firstIndex = $this->mIsBackwards ?
1553                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1554                         # Discard the extra result row if there is one
1555                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1556                                 if ( $this->mIsBackwards ) {
1557                                         # Index value of item past the index
1558                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1559                                         # Index value of bottom item in the list
1560                                         $lastIndex = $this->mHist[1]->getTimestamp();
1561                                         # Display range
1562                                         $this->mRange = array( 1, $numRows - 1 );
1563                                 } else {
1564                                         # Index value of item past the index
1565                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1566                                         # Index value of bottom item in the list
1567                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1568                                         # Display range
1569                                         $this->mRange = array( 0, $numRows - 2 );
1570                                 }
1571                         } else {
1572                                 # Setting indexes to an empty string means that they will be
1573                                 # omitted if they would otherwise appear in URLs. It just so
1574                                 # happens that this  is the right thing to do in the standard
1575                                 # UI, in all the relevant cases.
1576                                 $this->mPastTheEndIndex = '';
1577                                 # Index value of bottom item in the list
1578                                 $lastIndex = $this->mIsBackwards ?
1579                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1580                                 # Display range
1581                                 $this->mRange = array( 0, $numRows - 1 );
1582                         }
1583                 } else {
1584                         $firstIndex = '';
1585                         $lastIndex = '';
1586                         $this->mPastTheEndIndex = '';
1587                 }
1588                 if ( $this->mIsBackwards ) {
1589                         $this->mIsFirst = ( $numRows < $queryLimit );
1590                         $this->mIsLast = ( $this->mOffset == '' );
1591                         $this->mLastShown = $firstIndex;
1592                         $this->mFirstShown = $lastIndex;
1593                 } else {
1594                         $this->mIsFirst = ( $this->mOffset == '' );
1595                         $this->mIsLast = ( $numRows < $queryLimit );
1596                         $this->mLastShown = $lastIndex;
1597                         $this->mFirstShown = $firstIndex;
1598                 }
1599                 $this->mQueryDone = true;
1600         }
1601
1602         /**
1603          * @param bool $enable
1604          */
1605         protected function preventClickjacking( $enable = true ) {
1606                 $this->preventClickjacking = $enable;
1607         }
1608
1609         /**
1610          * @return bool
1611          */
1612         public function getPreventClickjacking() {
1613                 return $this->preventClickjacking;
1614         }
1615
1616 }