includes/page/ImagePage.php

   1 <?php
   2 /**
   3  * Special handling for file description pages.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Class for viewing MediaWiki file description pages
  25  *
  26  * @ingroup Media
  27  */
  28 class ImagePage extends Article {
  29         /** @var File */
  30         private $displayImg;
  31
  32         /** @var FileRepo */
  33         private $repo;
  34
  35         /** @var bool */
  36         private $fileLoaded;
  37
  38         /** @var bool */
  39         protected $mExtraDescription = false;
  40
  41         /**
  42          * @param Title $title
  43          * @return WikiFilePage
  44          */
  45         protected function newPage( Title $title ) {
  46                 // Overload mPage with a file-specific page
  47                 return new WikiFilePage( $title );
  48         }
  49
  50         /**
  51          * Constructor from a page id
  52          * @param int $id Article ID to load
  53          * @return ImagePage|null
  54          */
  55         public static function newFromID( $id ) {
  56                 $t = Title::newFromID( $id );
  57                 # @todo FIXME: Doesn't inherit right
  58                 return $t == null ? null : new self( $t );
  59                 # return $t == null ? null : new static( $t ); // PHP 5.3
  60         }
  61
  62         /**
  63          * @param File $file
  64          * @return void
  65          */
  66         public function setFile( $file ) {
  67                 $this->mPage->setFile( $file );
  68                 $this->displayImg = $file;
  69                 $this->fileLoaded = true;
  70         }
  71
  72         protected function loadFile() {
  73                 if ( $this->fileLoaded ) {
  74                         return;
  75                 }
  76                 $this->fileLoaded = true;
  77
  78                 $this->displayImg = $img = false;
  79                 Hooks::run( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  80                 if ( !$img ) { // not set by hook?
  81                         $img = wfFindFile( $this->getTitle() );
  82                         if ( !$img ) {
  83                                 $img = wfLocalFile( $this->getTitle() );
  84                         }
  85                 }
  86                 $this->mPage->setFile( $img );
  87                 if ( !$this->displayImg ) { // not set by hook?
  88                         $this->displayImg = $img;
  89                 }
  90                 $this->repo = $img->getRepo();
  91         }
  92
  93         /**
  94          * Handler for action=render
  95          * Include body text only; none of the image extras
  96          */
  97         public function render() {
  98                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
  99                 parent::view();
 100         }
 101
 102         public function view() {
 103                 global $wgShowEXIF;
 104
 105                 $out = $this->getContext()->getOutput();
 106                 $request = $this->getContext()->getRequest();
 107                 $diff = $request->getVal( 'diff' );
 108                 $diffOnly = $request->getBool(
 109                         'diffonly',
 110                         $this->getContext()->getUser()->getOption( 'diffonly' )
 111                 );
 112
 113                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( $diff !== null && $diffOnly ) ) {
 114                         parent::view();
 115                         return;
 116                 }
 117
 118                 $this->loadFile();
 119
 120                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
 121                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || $diff !== null ) {
 122                                 // mTitle is the same as the redirect target so ask Article
 123                                 // to perform the redirect for us.
 124                                 $request->setVal( 'diffonly', 'true' );
 125                                 parent::view();
 126                                 return;
 127                         } else {
 128                                 // mTitle is not the same as the redirect target so it is
 129                                 // probably the redirect page itself. Fake the redirect symbol
 130                                 $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 131                                 $out->addHTML( $this->viewRedirect(
 132                                         Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 133                                         /* $appendSubtitle */ true,
 134                                         /* $forceKnown */ true )
 135                                 );
 136                                 $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 137                                 return;
 138                         }
 139                 }
 140
 141                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 142                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 143                         $formattedMetadata = $this->displayImg->formatMetadata( $this->getContext() );
 144                         $showmeta = $formattedMetadata !== false;
 145                 } else {
 146                         $showmeta = false;
 147                 }
 148
 149                 if ( !$diff && $this->displayImg->exists() ) {
 150                         $out->addHTML( $this->showTOC( $showmeta ) );
 151                 }
 152
 153                 if ( !$diff ) {
 154                         $this->openShowImage();
 155                 }
 156
 157                 # No need to display noarticletext, we use our own message, output in openShowImage()
 158                 if ( $this->mPage->getID() ) {
 159                         # NS_FILE is in the user language, but this section (the actual wikitext)
 160                         # should be in page content language
 161                         $pageLang = $this->getTitle()->getPageViewLanguage();
 162                         $out->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 163                                 'lang' => $pageLang->getHtmlCode(), 'dir' => $pageLang->getDir(),
 164                                 'class' => 'mw-content-' . $pageLang->getDir() ) ) );
 165
 166                         parent::view();
 167
 168                         $out->addHTML( Xml::closeElement( 'div' ) );
 169                 } else {
 170                         # Just need to set the right headers
 171                         $out->setArticleFlag( true );
 172                         $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 173                         $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 174                 }
 175
 176                 # Show shared description, if needed
 177                 if ( $this->mExtraDescription ) {
 178                         $fol = $this->getContext()->msg( 'shareddescriptionfollows' );
 179                         if ( !$fol->isDisabled() ) {
 180                                 $out->addWikiText( $fol->plain() );
 181                         }
 182                         $out->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 183                 }
 184
 185                 $this->closeShowImage();
 186                 $this->imageHistory();
 187                 // TODO: Cleanup the following
 188
 189                 $out->addHTML( Xml::element( 'h2',
 190                         array( 'id' => 'filelinks' ),
 191                                 $this->getContext()->msg( 'imagelinks' )->text() ) . "\n" );
 192                 $this->imageDupes();
 193                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 194                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 195                 $this->imageLinks();
 196
 197                 # Allow extensions to add something after the image links
 198                 $html = '';
 199                 Hooks::run( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 200                 if ( $html ) {
 201                         $out->addHTML( $html );
 202                 }
 203
 204                 if ( $showmeta ) {
 205                         $out->addHTML( Xml::element(
 206                                 'h2',
 207                                 array( 'id' => 'metadata' ),
 208                                         $this->getContext()->msg( 'metadata' )->text() ) . "\n" );
 209                         $out->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 210                         $out->addModules( array( 'mediawiki.action.view.metadata' ) );
 211                 }
 212
 213                 // Add remote Filepage.css
 214                 if ( !$this->repo->isLocal() ) {
 215                         $css = $this->repo->getDescriptionStylesheetUrl();
 216                         if ( $css ) {
 217                                 $out->addStyle( $css );
 218                         }
 219                 }
 220                 // always show the local local Filepage.css, bug 29277
 221                 $out->addModuleStyles( 'filepage' );
 222         }
 223
 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                         $handler = $this->displayImg->getHandler();
 509
 510                         // If this is a filetype with potential issues, warn the user.
 511                         if ( $handler ) {
 512                                 $warningConfig = $handler->getWarningConfig( $this->displayImg );
 513
 514                                 if ( $warningConfig !== null ) {
 515                                         // The warning will be displayed via CSS and JavaScript.
 516                                         // We just need to tell the client side what message to use.
 517                                         $output = $this->getContext()->getOutput();
 518                                         $output->addJsConfigVars( 'wgFileWarning', $warningConfig );
 519                                         $output->addModules( $warningConfig['module'] );
 520                                         $output->addModules( 'mediawiki.filewarning' );
 521                                 }
 522                         }
 523
 524                         $medialink = "[[Media:$filename|$linktext]]";
 525
 526                         if ( !$this->displayImg->isSafeFile() ) {
 527                                 $warning = $this->getContext()->msg( 'mediawarning' )->plain();
 528                                 // dirmark is needed here to separate the file name, which
 529                                 // most likely ends in Latin characters, from the description,
 530                                 // which may begin with the file type. In RTL environment
 531                                 // this will get messy.
 532                                 // The dirmark, however, must not be immediately adjacent
 533                                 // to the filename, because it can get copied with it.
 534                                 // See bug 25277.
 535                                 // @codingStandardsIgnoreStart Ignore long line
 536                                 $out->addWikiText( <<<EOT
 537 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 538 <div class="mediaWarning">$warning</div>
 539 EOT
 540                                 );
 541                                 // @codingStandardsIgnoreEnd
 542                         } else {
 543                                 $out->addWikiText( <<<EOT
 544 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 545 </div>
 546 EOT
 547                                 );
 548                         }
 549
 550                         $renderLangOptions = $this->displayImg->getAvailableLanguages();
 551                         if ( count( $renderLangOptions ) >= 1 ) {
 552                                 $currentLanguage = $renderLang;
 553                                 $defaultLang = $this->displayImg->getDefaultRenderLanguage();
 554                                 if ( is_null( $currentLanguage ) ) {
 555                                         $currentLanguage = $defaultLang;
 556                                 }
 557                                 $out->addHtml( $this->doRenderLangOpt( $renderLangOptions, $currentLanguage, $defaultLang ) );
 558                         }
 559
 560                         // Add cannot animate thumbnail warning
 561                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 562                                 // Include the extension so wiki admins can
 563                                 // customize it on a per file-type basis
 564                                 // (aka say things like use format X instead).
 565                                 // additionally have a specific message for
 566                                 // file-no-thumb-animation-gif
 567                                 $ext = $this->displayImg->getExtension();
 568                                 $noAnimMesg = wfMessageFallback(
 569                                         'file-no-thumb-animation-' . $ext,
 570                                         'file-no-thumb-animation'
 571                                 )->plain();
 572
 573                                 $out->addWikiText( <<<EOT
 574 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 575 EOT
 576                                 );
 577                         }
 578
 579                         if ( !$this->displayImg->isLocal() ) {
 580                                 $this->printSharedImageText();
 581                         }
 582                 } else {
 583                         # Image does not exist
 584                         if ( !$this->getID() ) {
 585                                 # No article exists either
 586                                 # Show deletion log to be consistent with normal articles
 587                                 LogEventsList::showLogExtract(
 588                                         $out,
 589                                         array( 'delete', 'move' ),
 590                                         $this->getTitle()->getPrefixedText(),
 591                                         '',
 592                                         array( 'lim' => 10,
 593                                                 'conds' => array( "log_action != 'revision'" ),
 594                                                 'showIfEmpty' => false,
 595                                                 'msgKey' => array( 'moveddeleted-notice' )
 596                                         )
 597                                 );
 598                         }
 599
 600                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 601                                 // Only show an upload link if the user can upload
 602                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 603                                 $nofile = array(
 604                                         'filepage-nofile-link',
 605                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 606                                 );
 607                         } else {
 608                                 $nofile = 'filepage-nofile';
 609                         }
 610                         // Note, if there is an image description page, but
 611                         // no image, then this setRobotPolicy is overridden
 612                         // by Article::View().
 613                         $out->setRobotPolicy( 'noindex,nofollow' );
 614                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 615                         if ( !$this->getID() && $wgSend404Code ) {
 616                                 // If there is no image, no shared image, and no description page,
 617                                 // output a 404, to be consistent with Article::showMissingArticle.
 618                                 $request->response()->statusHeader( 404 );
 619                         }
 620                 }
 621                 $out->setFileVersion( $this->displayImg );
 622         }
 623
 624         /**
 625          * Creates an thumbnail of specified size and returns an HTML link to it
 626          * @param array $params Scaler parameters
 627          * @param int $width
 628          * @param int $height
 629          * @return string
 630          */
 631         private function makeSizeLink( $params, $width, $height ) {
 632                 $params['width'] = $width;
 633                 $params['height'] = $height;
 634                 $thumbnail = $this->displayImg->transform( $params );
 635                 if ( $thumbnail && !$thumbnail->isError() ) {
 636                         return Html::rawElement( 'a', array(
 637                                 'href' => $thumbnail->getUrl(),
 638                                 'class' => 'mw-thumbnail-link'
 639                                 ), $this->getContext()->msg( 'show-big-image-size' )->numParams(
 640                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 641                                 )->parse() );
 642                 } else {
 643                         return '';
 644                 }
 645         }
 646
 647         /**
 648          * Show a notice that the file is from a shared repository
 649          */
 650         protected function printSharedImageText() {
 651                 $out = $this->getContext()->getOutput();
 652                 $this->loadFile();
 653
 654                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 655                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 656
 657                 /* Add canonical to head if there is no local page for this shared file */
 658                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 659                         $out->setCanonicalUrl( $descUrl );
 660                 }
 661
 662                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 663                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 664
 665                 if ( $descUrl && $descText && $this->getContext()->msg( 'sharedupload-desc-here' )->plain() !== '-' ) {
 666                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 667                 } elseif ( $descUrl && $this->getContext()->msg( 'sharedupload-desc-there' )->plain() !== '-' ) {
 668                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 669                 } else {
 670                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 671                 }
 672
 673                 if ( $descText ) {
 674                         $this->mExtraDescription = $descText;
 675                 }
 676         }
 677
 678         public function getUploadUrl() {
 679                 $this->loadFile();
 680                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 681                 return $uploadTitle->getFullURL( array(
 682                         'wpDestFile' => $this->mPage->getFile()->getName(),
 683                         'wpForReUpload' => 1
 684                 ) );
 685         }
 686
 687         /**
 688          * Print out the various links at the bottom of the image page, e.g. reupload,
 689          * external editing (and instructions link) etc.
 690          */
 691         protected function uploadLinksBox() {
 692                 global $wgEnableUploads;
 693
 694                 if ( !$wgEnableUploads ) {
 695                         return;
 696                 }
 697
 698                 $this->loadFile();
 699                 if ( !$this->mPage->getFile()->isLocal() ) {
 700                         return;
 701                 }
 702
 703                 $out = $this->getContext()->getOutput();
 704                 $out->addHTML( "<ul>\n" );
 705
 706                 # "Upload a new version of this file" link
 707                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 708                 if ( $canUpload && UploadBase::userCanReUpload(
 709                                 $this->getContext()->getUser(),
 710                                 $this->mPage->getFile()->name )
 711                 ) {
 712                         $ulink = Linker::makeExternalLink(
 713                                 $this->getUploadUrl(),
 714                                 $this->getContext()->msg( 'uploadnewversion-linktext' )->text()
 715                         );
 716                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\">"
 717                                 . "<div class=\"plainlinks\">{$ulink}</div></li>\n" );
 718                 } else {
 719                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">"
 720                                 . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 721                 }
 722
 723                 $out->addHTML( "</ul>\n" );
 724         }
 725
 726         /**
 727          * For overloading
 728          */
 729         protected function closeShowImage() {
 730         }
 731
 732         /**
 733          * If the page we've just displayed is in the "Image" namespace,
 734          * we follow it with an upload history of the image and its usage.
 735          */
 736         protected function imageHistory() {
 737                 $this->loadFile();
 738                 $out = $this->getContext()->getOutput();
 739                 $pager = new ImageHistoryPseudoPager( $this );
 740                 $out->addHTML( $pager->getBody() );
 741                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 742
 743                 $this->mPage->getFile()->resetHistory(); // free db resources
 744
 745                 # Exist check because we don't want to show this on pages where an image
 746                 # doesn't exist along with the noimage message, that would suck. -ævar
 747                 if ( $this->mPage->getFile()->exists() ) {
 748                         $this->uploadLinksBox();
 749                 }
 750         }
 751
 752         /**
 753          * @param string $target
 754          * @param int $limit
 755          * @return ResultWrapper
 756          */
 757         protected function queryImageLinks( $target, $limit ) {
 758                 $dbr = wfGetDB( DB_SLAVE );
 759
 760                 return $dbr->select(
 761                         array( 'imagelinks', 'page' ),
 762                         array( 'page_namespace', 'page_title', 'il_to' ),
 763                         array( 'il_to' => $target, 'il_from = page_id' ),
 764                         __METHOD__,
 765                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 766                 );
 767         }
 768
 769         protected function imageLinks() {
 770                 $limit = 100;
 771
 772                 $out = $this->getContext()->getOutput();
 773
 774                 $rows = array();
 775                 $redirects = array();
 776                 foreach ( $this->getTitle()->getRedirectsHere( NS_FILE ) as $redir ) {
 777                         $redirects[$redir->getDBkey()] = array();
 778                         $rows[] = (object)array(
 779                                 'page_namespace' => NS_FILE,
 780                                 'page_title' => $redir->getDBkey(),
 781                         );
 782                 }
 783
 784                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 785                 foreach ( $res as $row ) {
 786                         $rows[] = $row;
 787                 }
 788                 $count = count( $rows );
 789
 790                 $hasMore = $count > $limit;
 791                 if ( !$hasMore && count( $redirects ) ) {
 792                         $res = $this->queryImageLinks( array_keys( $redirects ),
 793                                 $limit - count( $rows ) + 1 );
 794                         foreach ( $res as $row ) {
 795                                 $redirects[$row->il_to][] = $row;
 796                                 $count++;
 797                         }
 798                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 799                 }
 800
 801                 if ( $count == 0 ) {
 802                         $out->wrapWikiMsg(
 803                                 Html::rawElement( 'div',
 804                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 805                                 'nolinkstoimage'
 806                         );
 807                         return;
 808                 }
 809
 810                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 811                 if ( !$hasMore ) {
 812                         $out->addWikiMsg( 'linkstoimage', $count );
 813                 } else {
 814                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 815                         $out->addWikiMsg( 'linkstoimage-more',
 816                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 817                                 $this->getTitle()->getPrefixedDBkey()
 818                         );
 819                 }
 820
 821                 $out->addHTML(
 822                         Html::openElement( 'ul',
 823                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 824                 );
 825                 $count = 0;
 826
 827                 // Sort the list by namespace:title
 828                 usort( $rows, array( $this, 'compare' ) );
 829
 830                 // Create links for every element
 831                 $currentCount = 0;
 832                 foreach ( $rows as $element ) {
 833                         $currentCount++;
 834                         if ( $currentCount > $limit ) {
 835                                 break;
 836                         }
 837
 838                         $query = array();
 839                         # Add a redirect=no to make redirect pages reachable
 840                         if ( isset( $redirects[$element->page_title] ) ) {
 841                                 $query['redirect'] = 'no';
 842                         }
 843                         $link = Linker::linkKnown(
 844                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 845                                 null, array(), $query
 846                         );
 847                         if ( !isset( $redirects[$element->page_title] ) ) {
 848                                 # No redirects
 849                                 $liContents = $link;
 850                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 851                                 # Redirect without usages
 852                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 853                         } else {
 854                                 # Redirect with usages
 855                                 $li = '';
 856                                 foreach ( $redirects[$element->page_title] as $row ) {
 857                                         $currentCount++;
 858                                         if ( $currentCount > $limit ) {
 859                                                 break;
 860                                         }
 861
 862                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 863                                         $li .= Html::rawElement(
 864                                                 'li',
 865                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 866                                                 $link2
 867                                                 ) . "\n";
 868                                 }
 869
 870                                 $ul = Html::rawElement(
 871                                         'ul',
 872                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 873                                         $li
 874                                         ) . "\n";
 875                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )->rawParams(
 876                                         $link, $ul )->parse();
 877                         }
 878                         $out->addHTML( Html::rawElement(
 879                                         'li',
 880                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 881                                         $liContents
 882                                 ) . "\n"
 883                         );
 884
 885                 };
 886                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 887                 $res->free();
 888
 889                 // Add a links to [[Special:Whatlinkshere]]
 890                 if ( $count > $limit ) {
 891                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 892                 }
 893                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 894         }
 895
 896         protected function imageDupes() {
 897                 $this->loadFile();
 898                 $out = $this->getContext()->getOutput();
 899
 900                 $dupes = $this->mPage->getDuplicates();
 901                 if ( count( $dupes ) == 0 ) {
 902                         return;
 903                 }
 904
 905                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 906                 $out->addWikiMsg( 'duplicatesoffile',
 907                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 908                 );
 909                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 910
 911                 /**
 912                  * @var $file File
 913                  */
 914                 foreach ( $dupes as $file ) {
 915                         $fromSrc = '';
 916                         if ( $file->isLocal() ) {
 917                                 $link = Linker::linkKnown( $file->getTitle() );
 918                         } else {
 919                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 920                                         $file->getTitle()->getPrefixedText() );
 921                                 $fromSrc = $this->getContext()->msg( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 922                         }
 923                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 924                 }
 925                 $out->addHTML( "</ul></div>\n" );
 926         }
 927
 928         /**
 929          * Delete the file, or an earlier version of it
 930          */
 931         public function delete() {
 932                 $file = $this->mPage->getFile();
 933                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 934                         // Standard article deletion
 935                         parent::delete();
 936                         return;
 937                 }
 938
 939                 $deleter = new FileDeleteForm( $file );
 940                 $deleter->execute();
 941         }
 942
 943         /**
 944          * Display an error with a wikitext description
 945          *
 946          * @param string $description
 947          */
 948         function showError( $description ) {
 949                 $out = $this->getContext()->getOutput();
 950                 $out->setPageTitle( $this->getContext()->msg( 'internalerror' ) );
 951                 $out->setRobotPolicy( 'noindex,nofollow' );
 952                 $out->setArticleRelated( false );
 953                 $out->enableClientCache( false );
 954                 $out->addWikiText( $description );
 955         }
 956
 957         /**
 958          * Callback for usort() to do link sorts by (namespace, title)
 959          * Function copied from Title::compare()
 960          *
 961          * @param object $a Object page to compare with
 962          * @param object $b Object page to compare with
 963          * @return int Result of string comparison, or namespace comparison
 964          */
 965         protected function compare( $a, $b ) {
 966                 if ( $a->page_namespace == $b->page_namespace ) {
 967                         return strcmp( $a->page_title, $b->page_title );
 968                 } else {
 969                         return $a->page_namespace - $b->page_namespace;
 970                 }
 971         }
 972
 973         /**
 974          * Returns the corresponding $wgImageLimits entry for the selected user option
 975          *
 976          * @param User $user
 977          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 978          * @return array
 979          * @since 1.21
 980          */
 981         public function getImageLimitsFromOption( $user, $optionName ) {
 982                 global $wgImageLimits;
 983
 984                 $option = $user->getIntOption( $optionName );
 985                 if ( !isset( $wgImageLimits[$option] ) ) {
 986                         $option = User::getDefaultOption( $optionName );
 987                 }
 988
 989                 // The user offset might still be incorrect, specially if
 990                 // $wgImageLimits got changed (see bug #8858).
 991                 if ( !isset( $wgImageLimits[$option] ) ) {
 992                         // Default to the first offset in $wgImageLimits
 993                         $option = 0;
 994                 }
 995
 996                 return isset( $wgImageLimits[$option] )
 997                         ? $wgImageLimits[$option]
 998                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
 999         }
1000
1001         /**
1002          * Output a drop-down box for language options for the file
1003          *
1004          * @param array $langChoices Array of string language codes
1005          * @param string $curLang Language code file is being viewed in.
1006          * @param string $defaultLang Language code that image is rendered in by default
1007          * @return string HTML to insert underneath image.
1008          */
1009         protected function doRenderLangOpt( array $langChoices, $curLang, $defaultLang ) {
1010                 global $wgScript;
1011                 sort( $langChoices );
1012                 $curLang = wfBCP47( $curLang );
1013                 $defaultLang = wfBCP47( $defaultLang );
1014                 $opts = '';
1015                 $haveCurrentLang = false;
1016                 $haveDefaultLang = false;
1017
1018                 // We make a list of all the language choices in the file.
1019                 // Additionally if the default language to render this file
1020                 // is not included as being in this file (for example, in svgs
1021                 // usually the fallback content is the english content) also
1022                 // include a choice for that. Last of all, if we're viewing
1023                 // the file in a language not on the list, add it as a choice.
1024                 foreach ( $langChoices as $lang ) {
1025                         $code = wfBCP47( $lang );
1026                         $name = Language::fetchLanguageName( $code, $this->getContext()->getLanguage()->getCode() );
1027                         if ( $name !== '' ) {
1028                                 $display = $this->getContext()->msg( 'img-lang-opt', $code, $name )->text();
1029                         } else {
1030                                 $display = $code;
1031                         }
1032                         $opts .= "\n" . Xml::option( $display, $code, $curLang === $code );
1033                         if ( $curLang === $code ) {
1034                                 $haveCurrentLang = true;
1035                         }
1036                         if ( $defaultLang === $code ) {
1037                                 $haveDefaultLang = true;
1038                         }
1039                 }
1040                 if ( !$haveDefaultLang ) {
1041                         // Its hard to know if the content is really in the default language, or
1042                         // if its just unmarked content that could be in any language.
1043                         $opts = Xml::option(
1044                                         $this->getContext()->msg( 'img-lang-default' )->text(),
1045                                 $defaultLang,
1046                                 $defaultLang === $curLang
1047                         ) . $opts;
1048                 }
1049                 if ( !$haveCurrentLang && $defaultLang !== $curLang ) {
1050                         $name = Language::fetchLanguageName( $curLang, $this->getContext()->getLanguage()->getCode() );
1051                         if ( $name !== '' ) {
1052                                 $display = $this->getContext()->msg( 'img-lang-opt', $curLang, $name )->text();
1053                         } else {
1054                                 $display = $curLang;
1055                         }
1056                         $opts = Xml::option( $display, $curLang, true ) . $opts;
1057                 }
1058
1059                 $select = Html::rawElement(
1060                         'select',
1061                         array( 'id' => 'mw-imglangselector', 'name' => 'lang' ),
1062                         $opts
1063                 );
1064                 $submit = Xml::submitButton( $this->getContext()->msg( 'img-lang-go' )->text() );
1065
1066                 $formContents = $this->getContext()->msg( 'img-lang-info' )->rawParams( $select, $submit )->parse()
1067                         . Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() );
1068
1069                 $langSelectLine = Html::rawElement( 'div', array( 'id' => 'mw-imglangselector-line' ),
1070                         Html::rawElement( 'form', array( 'action' => $wgScript ), $formContents )
1071                 );
1072                 return $langSelectLine;
1073         }
1074
1075         /**
1076          * Get the width and height to display image at.
1077          *
1078          * @note This method assumes that it is only called if one
1079          *  of the dimensions are bigger than the max, or if the
1080          *  image is vectorized.
1081          *
1082          * @param int $maxWidth Max width to display at
1083          * @param int $maxHeight Max height to display at
1084          * @param int $width Actual width of the image
1085          * @param int $height Actual height of the image
1086          * @throws MWException
1087          * @return array Array (width, height)
1088          */
1089         protected function getDisplayWidthHeight( $maxWidth, $maxHeight, $width, $height ) {
1090                 if ( !$maxWidth || !$maxHeight ) {
1091                         // should never happen
1092                         throw new MWException( 'Using a choice from $wgImageLimits that is 0x0' );
1093                 }
1094
1095                 if ( !$width || !$height ) {
1096                         return array( 0, 0 );
1097                 }
1098
1099                 # Calculate the thumbnail size.
1100                 if ( $width <= $maxWidth && $height <= $maxHeight ) {
1101                         // Vectorized image, do nothing.
1102                 } elseif ( $width / $height >= $maxWidth / $maxHeight ) {
1103                         # The limiting factor is the width, not the height.
1104                         $height = round( $height * $maxWidth / $width );
1105                         $width = $maxWidth;
1106                         # Note that $height <= $maxHeight now.
1107                 } else {
1108                         $newwidth = floor( $width * $maxHeight / $height );
1109                         $height = round( $height * $newwidth / $width );
1110                         $width = $newwidth;
1111                         # Note that $height <= $maxHeight now, but might not be identical
1112                         # because of rounding.
1113                 }
1114                 return array( $width, $height );
1115         }
1116
1117         /**
1118          * Get alternative thumbnail sizes.
1119          *
1120          * @note This will only list several alternatives if thumbnails are rendered on 404
1121          * @param int $origWidth Actual width of image
1122          * @param int $origHeight Actual height of image
1123          * @return array An array of [width, height] pairs.
1124          */
1125         protected function getThumbSizes( $origWidth, $origHeight ) {
1126                 global $wgImageLimits;
1127                 if ( $this->displayImg->getRepo()->canTransformVia404() ) {
1128                         $thumbSizes = $wgImageLimits;
1129                         // Also include the full sized resolution in the list, so
1130                         // that users know they can get it. This will link to the
1131                         // original file asset if mustRender() === false. In the case
1132                         // that we mustRender, some users have indicated that they would
1133                         // find it useful to have the full size image in the rendered
1134                         // image format.
1135                         $thumbSizes[] = array( $origWidth, $origHeight );
1136                 } else {
1137                         # Creating thumb links triggers thumbnail generation.
1138                         # Just generate the thumb for the current users prefs.
1139                         $thumbSizes = array( $this->getImageLimitsFromOption( $this->getContext()->getUser(), 'thumbsize' ) );
1140                         if ( !$this->displayImg->mustRender() ) {
1141                                 // We can safely include a link to the "full-size" preview,
1142                                 // without actually rendering.
1143                                 $thumbSizes[] = array( $origWidth, $origHeight );
1144                         }
1145                 }
1146                 return $thumbSizes;
1147         }
1148
1149 }
1150
1151 /**
1152  * Builds the image revision log shown on image pages
1153  *
1154  * @ingroup Media
1155  */
1156 class ImageHistoryList extends ContextSource {
1157
1158         /**
1159          * @var Title
1160          */
1161         protected $title;
1162
1163         /**
1164          * @var File
1165          */
1166         protected $img;
1167
1168         /**
1169          * @var ImagePage
1170          */
1171         protected $imagePage;
1172
1173         /**
1174          * @var File
1175          */
1176         protected $current;
1177
1178         protected $repo, $showThumb;
1179         protected $preventClickjacking = false;
1180
1181         /**
1182          * @param ImagePage $imagePage
1183          */
1184         public function __construct( $imagePage ) {
1185                 global $wgShowArchiveThumbnails;
1186                 $this->current = $imagePage->getFile();
1187                 $this->img = $imagePage->getDisplayedFile();
1188                 $this->title = $imagePage->getTitle();
1189                 $this->imagePage = $imagePage;
1190                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
1191                 $this->setContext( $imagePage->getContext() );
1192         }
1193
1194         /**
1195          * @return ImagePage
1196          */
1197         public function getImagePage() {
1198                 return $this->imagePage;
1199         }
1200
1201         /**
1202          * @return File
1203          */
1204         public function getFile() {
1205                 return $this->img;
1206         }
1207
1208         /**
1209          * @param string $navLinks
1210          * @return string
1211          */
1212         public function beginImageHistoryList( $navLinks = '' ) {
1213                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() )
1214                         . "\n"
1215                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1216                         . $this->msg( 'filehist-help' )->parseAsBlock()
1217                         . $navLinks . "\n"
1218                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1219                         . '<tr><th></th>'
1220                         . ( $this->current->isLocal()
1221                                 && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<th></th>' : '' )
1222                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1223                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1224                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1225                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1226                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1227                         . "</tr>\n";
1228         }
1229
1230         /**
1231          * @param string $navLinks
1232          * @return string
1233          */
1234         public function endImageHistoryList( $navLinks = '' ) {
1235                 return "</table>\n$navLinks\n</div>\n";
1236         }
1237
1238         /**
1239          * @param bool $iscur
1240          * @param File $file
1241          * @return string
1242          */
1243         public function imageHistoryLine( $iscur, $file ) {
1244                 global $wgContLang;
1245
1246                 $user = $this->getUser();
1247                 $lang = $this->getLanguage();
1248                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1249                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1250                 $userId = $file->getUser( 'id' );
1251                 $userText = $file->getUser( 'text' );
1252                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1253
1254                 $local = $this->current->isLocal();
1255                 $row = $selected = '';
1256
1257                 // Deletion link
1258                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1259                         $row .= '<td>';
1260                         # Link to remove from history
1261                         if ( $user->isAllowed( 'delete' ) ) {
1262                                 $q = array( 'action' => 'delete' );
1263                                 if ( !$iscur ) {
1264                                         $q['oldimage'] = $img;
1265                                 }
1266                                 $row .= Linker::linkKnown(
1267                                         $this->title,
1268                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1269                                         array(), $q
1270                                 );
1271                         }
1272                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1273                         $canHide = $user->isAllowed( 'deleterevision' );
1274                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1275                                 if ( $user->isAllowed( 'delete' ) ) {
1276                                         $row .= '<br />';
1277                                 }
1278                                 // If file is top revision or locked from this user, don't link
1279                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1280                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1281                                 } else {
1282                                         list( $ts, ) = explode( '!', $img, 2 );
1283                                         $query = array(
1284                                                 'type' => 'oldimage',
1285                                                 'target' => $this->title->getPrefixedText(),
1286                                                 'ids' => $ts,
1287                                         );
1288                                         $del = Linker::revDeleteLink( $query,
1289                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1290                                 }
1291                                 $row .= $del;
1292                         }
1293                         $row .= '</td>';
1294                 }
1295
1296                 // Reversion link/current indicator
1297                 $row .= '<td>';
1298                 if ( $iscur ) {
1299                         $row .= $this->msg( 'filehist-current' )->escaped();
1300                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1301                         && $this->title->quickUserCan( 'upload', $user )
1302                 ) {
1303                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1304                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1305                         } else {
1306                                 $row .= Linker::linkKnown(
1307                                         $this->title,
1308                                         $this->msg( 'filehist-revert' )->escaped(),
1309                                         array(),
1310                                         array(
1311                                                 'action' => 'revert',
1312                                                 'oldimage' => $img,
1313                                                 'wpEditToken' => $user->getEditToken( $img )
1314                                         )
1315                                 );
1316                         }
1317                 }
1318                 $row .= '</td>';
1319
1320                 // Date/time and image link
1321                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1322                         $selected = "class='filehistory-selected'";
1323                 }
1324                 $row .= "<td $selected style='white-space: nowrap;'>";
1325                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1326                         # Don't link to unviewable files
1327                         $row .= '<span class="history-deleted">'
1328                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1329                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1330                         if ( $local ) {
1331                                 $this->preventClickjacking();
1332                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1333                                 # Make a link to review the image
1334                                 $url = Linker::linkKnown(
1335                                         $revdel,
1336                                         $lang->userTimeAndDate( $timestamp, $user ),
1337                                         array(),
1338                                         array(
1339                                                 'target' => $this->title->getPrefixedText(),
1340                                                 'file' => $img,
1341                                                 'token' => $user->getEditToken( $img )
1342                                         )
1343                                 );
1344                         } else {
1345                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1346                         }
1347                         $row .= '<span class="history-deleted">' . $url . '</span>';
1348                 } elseif ( !$file->exists() ) {
1349                         $row .= '<span class="mw-file-missing">'
1350                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1351                 } else {
1352                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1353                         $row .= Xml::element(
1354                                 'a',
1355                                 array( 'href' => $url ),
1356                                 $lang->userTimeAndDate( $timestamp, $user )
1357                         );
1358                 }
1359                 $row .= "</td>";
1360
1361                 // Thumbnail
1362                 if ( $this->showThumb ) {
1363                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1364                 }
1365
1366                 // Image dimensions + size
1367                 $row .= '<td>';
1368                 $row .= htmlspecialchars( $file->getDimensionsString() );
1369                 $row .= $this->msg( 'word-separator' )->escaped();
1370                 $row .= '<span style="white-space: nowrap;">';
1371                 $row .= $this->msg( 'parentheses' )->sizeParams( $file->getSize() )->escaped();
1372                 $row .= '</span>';
1373                 $row .= '</td>';
1374
1375                 // Uploading user
1376                 $row .= '<td>';
1377                 // Hide deleted usernames
1378                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1379                         $row .= '<span class="history-deleted">'
1380                                 . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1381                 } else {
1382                         if ( $local ) {
1383                                 $row .= Linker::userLink( $userId, $userText );
1384                                 $row .= '<span style="white-space: nowrap;">';
1385                                 $row .= Linker::userToolLinks( $userId, $userText );
1386                                 $row .= '</span>';
1387                         } else {
1388                                 $row .= htmlspecialchars( $userText );
1389                         }
1390                 }
1391                 $row .= '</td>';
1392
1393                 // Don't show deleted descriptions
1394                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1395                         $row .= '<td><span class="history-deleted">' .
1396                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1397                 } else {
1398                         $row .= '<td dir="' . $wgContLang->getDir() . '">' .
1399                                 Linker::formatComment( $description, $this->title ) . '</td>';
1400                 }
1401
1402                 $rowClass = null;
1403                 Hooks::run( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1404                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1405
1406                 return "<tr{$classAttr}>{$row}</tr>\n";
1407         }
1408
1409         /**
1410          * @param File $file
1411          * @return string
1412          */
1413         protected function getThumbForLine( $file ) {
1414                 $lang = $this->getLanguage();
1415                 $user = $this->getUser();
1416                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1417                         && !$file->isDeleted( File::DELETED_FILE )
1418                 ) {
1419                         $params = array(
1420                                 'width' => '120',
1421                                 'height' => '120',
1422                         );
1423                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1424
1425                         $thumbnail = $file->transform( $params );
1426                         $options = array(
1427                                 'alt' => $this->msg( 'filehist-thumbtext',
1428                                         $lang->userTimeAndDate( $timestamp, $user ),
1429                                         $lang->userDate( $timestamp, $user ),
1430                                         $lang->userTime( $timestamp, $user ) )->text(),
1431                                 'file-link' => true,
1432                         );
1433
1434                         if ( !$thumbnail ) {
1435                                 return $this->msg( 'filehist-nothumb' )->escaped();
1436                         }
1437
1438                         return $thumbnail->toHtml( $options );
1439                 } else {
1440                         return $this->msg( 'filehist-nothumb' )->escaped();
1441                 }
1442         }
1443
1444         /**
1445          * @param bool $enable
1446          */
1447         protected function preventClickjacking( $enable = true ) {
1448                 $this->preventClickjacking = $enable;
1449         }
1450
1451         /**
1452          * @return bool
1453          */
1454         public function getPreventClickjacking() {
1455                 return $this->preventClickjacking;
1456         }
1457 }
1458
1459 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1460         protected $preventClickjacking = false;
1461
1462         /**
1463          * @var File
1464          */
1465         protected $mImg;
1466
1467         /**
1468          * @var Title
1469          */
1470         protected $mTitle;
1471
1472         /**
1473          * @param ImagePage $imagePage
1474          */
1475         function __construct( $imagePage ) {
1476                 parent::__construct( $imagePage->getContext() );
1477                 $this->mImagePage = $imagePage;
1478                 $this->mTitle = clone ( $imagePage->getTitle() );
1479                 $this->mTitle->setFragment( '#filehistory' );
1480                 $this->mImg = null;
1481                 $this->mHist = array();
1482                 $this->mRange = array( 0, 0 ); // display range
1483         }
1484
1485         /**
1486          * @return Title
1487          */
1488         function getTitle() {
1489                 return $this->mTitle;
1490         }
1491
1492         function getQueryInfo() {
1493                 return false;
1494         }
1495
1496         /**
1497          * @return string
1498          */
1499         function getIndexField() {
1500                 return '';
1501         }
1502
1503         /**
1504          * @param object $row
1505          * @return string
1506          */
1507         function formatRow( $row ) {
1508                 return '';
1509         }
1510
1511         /**
1512          * @return string
1513          */
1514         function getBody() {
1515                 $s = '';
1516                 $this->doQuery();
1517                 if ( count( $this->mHist ) ) {
1518                         if ( $this->mImg->isLocal() ) {
1519                                 // Do a batch existence check for user pages and talkpages
1520                                 $linkBatch = new LinkBatch();
1521                                 for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1522                                         $file = $this->mHist[$i];
1523                                         $user = $file->getUser( 'text' );
1524                                         $linkBatch->add( NS_USER, $user );
1525                                         $linkBatch->add( NS_USER_TALK, $user );
1526                                 }
1527                                 $linkBatch->execute();
1528                         }
1529
1530                         $list = new ImageHistoryList( $this->mImagePage );
1531                         # Generate prev/next links
1532                         $navLink = $this->getNavigationBar();
1533                         $s = $list->beginImageHistoryList( $navLink );
1534                         // Skip rows there just for paging links
1535                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1536                                 $file = $this->mHist[$i];
1537                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1538                         }
1539                         $s .= $list->endImageHistoryList( $navLink );
1540
1541                         if ( $list->getPreventClickjacking() ) {
1542                                 $this->preventClickjacking();
1543                         }
1544                 }
1545                 return $s;
1546         }
1547
1548         function doQuery() {
1549                 if ( $this->mQueryDone ) {
1550                         return;
1551                 }
1552                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1553                 if ( !$this->mImg->exists() ) {
1554                         return;
1555                 }
1556                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1557                 if ( $this->mIsBackwards ) {
1558                         // Fetch the file history
1559                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1560                         // The current rev may not meet the offset/limit
1561                         $numRows = count( $this->mHist );
1562                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1563                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1564                         }
1565                 } else {
1566                         // The current rev may not meet the offset
1567                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1568                                 $this->mHist[] = $this->mImg;
1569                         }
1570                         // Old image versions (fetch extra row for nav links)
1571                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1572                         // Fetch the file history
1573                         $this->mHist = array_merge( $this->mHist,
1574                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1575                 }
1576                 $numRows = count( $this->mHist ); // Total number of query results
1577                 if ( $numRows ) {
1578                         # Index value of top item in the list
1579                         $firstIndex = $this->mIsBackwards ?
1580                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1581                         # Discard the extra result row if there is one
1582                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1583                                 if ( $this->mIsBackwards ) {
1584                                         # Index value of item past the index
1585                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1586                                         # Index value of bottom item in the list
1587                                         $lastIndex = $this->mHist[1]->getTimestamp();
1588                                         # Display range
1589                                         $this->mRange = array( 1, $numRows - 1 );
1590                                 } else {
1591                                         # Index value of item past the index
1592                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1593                                         # Index value of bottom item in the list
1594                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1595                                         # Display range
1596                                         $this->mRange = array( 0, $numRows - 2 );
1597                                 }
1598                         } else {
1599                                 # Setting indexes to an empty string means that they will be
1600                                 # omitted if they would otherwise appear in URLs. It just so
1601                                 # happens that this  is the right thing to do in the standard
1602                                 # UI, in all the relevant cases.
1603                                 $this->mPastTheEndIndex = '';
1604                                 # Index value of bottom item in the list
1605                                 $lastIndex = $this->mIsBackwards ?
1606                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1607                                 # Display range
1608                                 $this->mRange = array( 0, $numRows - 1 );
1609                         }
1610                 } else {
1611                         $firstIndex = '';
1612                         $lastIndex = '';
1613                         $this->mPastTheEndIndex = '';
1614                 }
1615                 if ( $this->mIsBackwards ) {
1616                         $this->mIsFirst = ( $numRows < $queryLimit );
1617                         $this->mIsLast = ( $this->mOffset == '' );
1618                         $this->mLastShown = $firstIndex;
1619                         $this->mFirstShown = $lastIndex;
1620                 } else {
1621                         $this->mIsFirst = ( $this->mOffset == '' );
1622                         $this->mIsLast = ( $numRows < $queryLimit );
1623                         $this->mLastShown = $lastIndex;
1624                         $this->mFirstShown = $firstIndex;
1625                 }
1626                 $this->mQueryDone = true;
1627         }
1628
1629         /**
1630          * @param bool $enable
1631          */
1632         protected function preventClickjacking( $enable = true ) {
1633                 $this->preventClickjacking = $enable;
1634         }
1635
1636         /**
1637          * @return bool
1638          */
1639         public function getPreventClickjacking() {
1640                 return $this->preventClickjacking;
1641         }
1642
1643 }