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