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