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                 // Add MediaWiki styles for a file page
 224                 $out->addModuleStyles( 'mediawiki.action.view.filepage' );
 225         }
 226
 227         /**
 228          * @return File
 229          */
 230         public function getDisplayedFile() {
 231                 $this->loadFile();
 232                 return $this->displayImg;
 233         }
 234
 235         /**
 236          * Create the TOC
 237          *
 238          * @param bool $metadata Whether or not to show the metadata link
 239          * @return string
 240          */
 241         protected function showTOC( $metadata ) {
 242                 $r = array(
 243                         '<li><a href="#file">' . $this->getContext()->msg( 'file-anchor-link' )->escaped() . '</a></li>',
 244                         '<li><a href="#filehistory">' . $this->getContext()->msg( 'filehist' )->escaped() . '</a></li>',
 245                         '<li><a href="#filelinks">' . $this->getContext()->msg( 'imagelinks' )->escaped() . '</a></li>',
 246                 );
 247
 248                 Hooks::run( 'ImagePageShowTOC', array( $this, &$r ) );
 249
 250                 if ( $metadata ) {
 251                         $r[] = '<li><a href="#metadata">' . $this->getContext()->msg( 'metadata' )->escaped() . '</a></li>';
 252                 }
 253
 254                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 255         }
 256
 257         /**
 258          * Make a table with metadata to be shown in the output page.
 259          *
 260          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 261          *
 262          * @param array $metadata The array containing the Exif data
 263          * @return string The metadata table. This is treated as Wikitext (!)
 264          */
 265         protected function makeMetadataTable( $metadata ) {
 266                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 267                 $r .= $this->getContext()->msg( 'metadata-help' )->plain();
 268                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 269                 foreach ( $metadata as $type => $stuff ) {
 270                         foreach ( $stuff as $v ) {
 271                                 # @todo FIXME: Why is this using escapeId for a class?!
 272                                 $class = Sanitizer::escapeId( $v['id'] );
 273                                 if ( $type == 'collapsed' ) {
 274                                         // Handled by mediawiki.action.view.metadata module.
 275                                         $class .= ' collapsable';
 276                                 }
 277                                 $r .= "<tr class=\"$class\">\n";
 278                                 $r .= "<th>{$v['name']}</th>\n";
 279                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 280                         }
 281                 }
 282                 $r .= "</table>\n</div>\n";
 283                 return $r;
 284         }
 285
 286         /**
 287          * Overloading Article's getContentObject method.
 288          *
 289          * Omit noarticletext if sharedupload; text will be fetched from the
 290          * shared upload server if possible.
 291          * @return string
 292          */
 293         public function getContentObject() {
 294                 $this->loadFile();
 295                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 296                         return null;
 297                 }
 298                 return parent::getContentObject();
 299         }
 300
 301         protected function openShowImage() {
 302                 global $wgEnableUploads, $wgSend404Code, $wgSVGMaxSize;
 303
 304                 $this->loadFile();
 305                 $out = $this->getContext()->getOutput();
 306                 $user = $this->getContext()->getUser();
 307                 $lang = $this->getContext()->getLanguage();
 308                 $dirmark = $lang->getDirMarkEntity();
 309                 $request = $this->getContext()->getRequest();
 310
 311                 $max = $this->getImageLimitsFromOption( $user, 'imagesize' );
 312                 $maxWidth = $max[0];
 313                 $maxHeight = $max[1];
 314
 315                 if ( $this->displayImg->exists() ) {
 316                         # image
 317                         $page = $request->getIntOrNull( 'page' );
 318                         if ( is_null( $page ) ) {
 319                                 $params = array();
 320                                 $page = 1;
 321                         } else {
 322                                 $params = array( 'page' => $page );
 323                         }
 324
 325                         $renderLang = $request->getVal( 'lang' );
 326                         if ( !is_null( $renderLang ) ) {
 327                                 $handler = $this->displayImg->getHandler();
 328                                 if ( $handler && $handler->validateParam( 'lang', $renderLang ) ) {
 329                                         $params['lang'] = $renderLang;
 330                                 } else {
 331                                         $renderLang = null;
 332                                 }
 333                         }
 334
 335                         $width_orig = $this->displayImg->getWidth( $page );
 336                         $width = $width_orig;
 337                         $height_orig = $this->displayImg->getHeight( $page );
 338                         $height = $height_orig;
 339
 340                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 341                         $linktext = $filename;
 342
 343                         Hooks::run( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 344
 345                         if ( $this->displayImg->allowInlineDisplay() ) {
 346                                 # image
 347                                 # "Download high res version" link below the image
 348                                 # $msgsize = $this->getContext()->msg( 'file-info-size', $width_orig, $height_orig,
 349                                 #   Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 350                                 # We'll show a thumbnail of this image
 351                                 if ( $width > $maxWidth || $height > $maxHeight || $this->displayImg->isVectorized() ) {
 352                                         list( $width, $height ) = $this->getDisplayWidthHeight(
 353                                                 $maxWidth, $maxHeight, $width, $height
 354                                         );
 355                                         $linktext = $this->getContext()->msg( 'show-big-image' )->escaped();
 356
 357                                         $thumbSizes = $this->getThumbSizes( $width_orig, $height_orig );
 358                                         # Generate thumbnails or thumbnail links as needed...
 359                                         $otherSizes = array();
 360                                         foreach ( $thumbSizes as $size ) {
 361                                                 // We include a thumbnail size in the list, if it is
 362                                                 // less than or equal to the original size of the image
 363                                                 // asset ($width_orig/$height_orig). We also exclude
 364                                                 // the current thumbnail's size ($width/$height)
 365                                                 // since that is added to the message separately, so
 366                                                 // it can be denoted as the current size being shown.
 367                                                 // Vectorized images are limited by $wgSVGMaxSize big,
 368                                                 // so all thumbs less than or equal that are shown.
 369                                                 if ( ( ( $size[0] <= $width_orig && $size[1] <= $height_orig )
 370                                                                 || ( $this->displayImg->isVectorized()
 371                                                                         && max( $size[0], $size[1] ) <= $wgSVGMaxSize )
 372                                                         )
 373                                                         && $size[0] != $width && $size[1] != $height
 374                                                 ) {
 375                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 376                                                         if ( $sizeLink ) {
 377                                                                 $otherSizes[] = $sizeLink;
 378                                                         }
 379                                                 }
 380                                         }
 381                                         $otherSizes = array_unique( $otherSizes );
 382
 383                                         $msgsmall = '';
 384                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 385                                         if ( $sizeLinkBigImagePreview ) {
 386                                                 $msgsmall .= $this->getContext()->msg( 'show-big-image-preview' )->
 387                                                         rawParams( $sizeLinkBigImagePreview )->
 388                                                         parse();
 389                                         }
 390                                         if ( count( $otherSizes ) ) {
 391                                                 $msgsmall .= ' ' .
 392                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 393                                                         $this->getContext()->msg( 'show-big-image-other' )->rawParams( $lang->pipeList( $otherSizes ) )->
 394                                                         params( count( $otherSizes ) )->parse()
 395                                                 );
 396                                         }
 397                                 } elseif ( $width == 0 && $height == 0 ) {
 398                                         # Some sort of audio file that doesn't have dimensions
 399                                         # Don't output a no hi res message for such a file
 400                                         $msgsmall = '';
 401                                 } else {
 402                                         # Image is small enough to show full size on image page
 403                                         $msgsmall = $this->getContext()->msg( 'file-nohires' )->parse();
 404                                 }
 405
 406                                 $params['width'] = $width;
 407                                 $params['height'] = $height;
 408                                 $thumbnail = $this->displayImg->transform( $params );
 409                                 Linker::processResponsiveImages( $this->displayImg, $thumbnail, $params );
 410
 411                                 $anchorclose = Html::rawElement(
 412                                         'div',
 413                                         array( 'class' => 'mw-filepage-resolutioninfo' ),
 414                                         $msgsmall
 415                                 );
 416
 417                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 418                                 if ( $isMulti ) {
 419                                         $out->addModules( 'mediawiki.page.image.pagination' );
 420                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 421                                 }
 422
 423                                 if ( $thumbnail ) {
 424                                         $options = array(
 425                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 426                                                 'file-link' => true,
 427                                         );
 428                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 429                                                 $thumbnail->toHtml( $options ) .
 430                                                 $anchorclose . "</div>\n" );
 431                                 }
 432
 433                                 if ( $isMulti ) {
 434                                         $count = $this->displayImg->pageCount();
 435
 436                                         if ( $page > 1 ) {
 437                                                 $label = $out->parse( $this->getContext()->msg( 'imgmultipageprev' )->text(), false );
 438                                                 // on the client side, this link is generated in ajaxifyPageNavigation()
 439                                                 // in the mediawiki.page.image.pagination module
 440                                                 $link = Linker::linkKnown(
 441                                                         $this->getTitle(),
 442                                                         $label,
 443                                                         array(),
 444                                                         array( 'page' => $page - 1 )
 445                                                 );
 446                                                 $thumb1 = Linker::makeThumbLinkObj(
 447                                                         $this->getTitle(),
 448                                                         $this->displayImg,
 449                                                         $link,
 450                                                         $label,
 451                                                         'none',
 452                                                         array( 'page' => $page - 1 )
 453                                                 );
 454                                         } else {
 455                                                 $thumb1 = '';
 456                                         }
 457
 458                                         if ( $page < $count ) {
 459                                                 $label = $this->getContext()->msg( 'imgmultipagenext' )->text();
 460                                                 $link = Linker::linkKnown(
 461                                                         $this->getTitle(),
 462                                                         $label,
 463                                                         array(),
 464                                                         array( 'page' => $page + 1 )
 465                                                 );
 466                                                 $thumb2 = Linker::makeThumbLinkObj(
 467                                                         $this->getTitle(),
 468                                                         $this->displayImg,
 469                                                         $link,
 470                                                         $label,
 471                                                         'none',
 472                                                         array( 'page' => $page + 1 )
 473                                                 );
 474                                         } else {
 475                                                 $thumb2 = '';
 476                                         }
 477
 478                                         global $wgScript;
 479
 480                                         $formParams = array(
 481                                                 'name' => 'pageselector',
 482                                                 'action' => $wgScript,
 483                                         );
 484                                         $options = array();
 485                                         for ( $i = 1; $i <= $count; $i++ ) {
 486                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 487                                         }
 488                                         $select = Xml::tags( 'select',
 489                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 490                                                 implode( "\n", $options ) );
 491
 492                                         $out->addHTML(
 493                                                 '</td><td><div class="multipageimagenavbox">' .
 494                                                 Xml::openElement( 'form', $formParams ) .
 495                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 496                                                 $this->getContext()->msg( 'imgmultigoto' )->rawParams( $select )->parse() .
 497                                                 Xml::submitButton( $this->getContext()->msg( 'imgmultigo' )->text() ) .
 498                                                 Xml::closeElement( 'form' ) .
 499                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 500                                         );
 501                                 }
 502                         } elseif ( $this->displayImg->isSafeFile() ) {
 503                                 # if direct link is allowed but it's not a renderable image, show an icon.
 504                                 $icon = $this->displayImg->iconThumb();
 505
 506                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 507                                         $icon->toHtml( array( 'file-link' => true ) ) .
 508                                         "</div>\n" );
 509                         }
 510
 511                         $longDesc = $this->getContext()->msg( 'parentheses', $this->displayImg->getLongDesc() )->text();
 512
 513                         $handler = $this->displayImg->getHandler();
 514
 515                         // If this is a filetype with potential issues, warn the user.
 516                         if ( $handler ) {
 517                                 $warningConfig = $handler->getWarningConfig( $this->displayImg );
 518
 519                                 if ( $warningConfig !== null ) {
 520                                         // The warning will be displayed via CSS and JavaScript.
 521                                         // We just need to tell the client side what message to use.
 522                                         $output = $this->getContext()->getOutput();
 523                                         $output->addJsConfigVars( 'wgFileWarning', $warningConfig );
 524                                         $output->addModules( $warningConfig['module'] );
 525                                         $output->addModules( 'mediawiki.filewarning' );
 526                                 }
 527                         }
 528
 529                         $medialink = "[[Media:$filename|$linktext]]";
 530
 531                         if ( !$this->displayImg->isSafeFile() ) {
 532                                 $warning = $this->getContext()->msg( 'mediawarning' )->plain();
 533                                 // dirmark is needed here to separate the file name, which
 534                                 // most likely ends in Latin characters, from the description,
 535                                 // which may begin with the file type. In RTL environment
 536                                 // this will get messy.
 537                                 // The dirmark, however, must not be immediately adjacent
 538                                 // to the filename, because it can get copied with it.
 539                                 // See bug 25277.
 540                                 // @codingStandardsIgnoreStart Ignore long line
 541                                 $out->addWikiText( <<<EOT
 542 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 543 <div class="mediaWarning">$warning</div>
 544 EOT
 545                                 );
 546                                 // @codingStandardsIgnoreEnd
 547                         } else {
 548                                 $out->addWikiText( <<<EOT
 549 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 550 </div>
 551 EOT
 552                                 );
 553                         }
 554
 555                         $renderLangOptions = $this->displayImg->getAvailableLanguages();
 556                         if ( count( $renderLangOptions ) >= 1 ) {
 557                                 $currentLanguage = $renderLang;
 558                                 $defaultLang = $this->displayImg->getDefaultRenderLanguage();
 559                                 if ( is_null( $currentLanguage ) ) {
 560                                         $currentLanguage = $defaultLang;
 561                                 }
 562                                 $out->addHtml( $this->doRenderLangOpt( $renderLangOptions, $currentLanguage, $defaultLang ) );
 563                         }
 564
 565                         // Add cannot animate thumbnail warning
 566                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 567                                 // Include the extension so wiki admins can
 568                                 // customize it on a per file-type basis
 569                                 // (aka say things like use format X instead).
 570                                 // additionally have a specific message for
 571                                 // file-no-thumb-animation-gif
 572                                 $ext = $this->displayImg->getExtension();
 573                                 $noAnimMesg = wfMessageFallback(
 574                                         'file-no-thumb-animation-' . $ext,
 575                                         'file-no-thumb-animation'
 576                                 )->plain();
 577
 578                                 $out->addWikiText( <<<EOT
 579 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 580 EOT
 581                                 );
 582                         }
 583
 584                         if ( !$this->displayImg->isLocal() ) {
 585                                 $this->printSharedImageText();
 586                         }
 587                 } else {
 588                         # Image does not exist
 589                         if ( !$this->getID() ) {
 590                                 # No article exists either
 591                                 # Show deletion log to be consistent with normal articles
 592                                 LogEventsList::showLogExtract(
 593                                         $out,
 594                                         array( 'delete', 'move' ),
 595                                         $this->getTitle()->getPrefixedText(),
 596                                         '',
 597                                         array( 'lim' => 10,
 598                                                 'conds' => array( "log_action != 'revision'" ),
 599                                                 'showIfEmpty' => false,
 600                                                 'msgKey' => array( 'moveddeleted-notice' )
 601                                         )
 602                                 );
 603                         }
 604
 605                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 606                                 // Only show an upload link if the user can upload
 607                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 608                                 $nofile = array(
 609                                         'filepage-nofile-link',
 610                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 611                                 );
 612                         } else {
 613                                 $nofile = 'filepage-nofile';
 614                         }
 615                         // Note, if there is an image description page, but
 616                         // no image, then this setRobotPolicy is overridden
 617                         // by Article::View().
 618                         $out->setRobotPolicy( 'noindex,nofollow' );
 619                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 620                         if ( !$this->getID() && $wgSend404Code ) {
 621                                 // If there is no image, no shared image, and no description page,
 622                                 // output a 404, to be consistent with Article::showMissingArticle.
 623                                 $request->response()->statusHeader( 404 );
 624                         }
 625                 }
 626                 $out->setFileVersion( $this->displayImg );
 627         }
 628
 629         /**
 630          * Creates an thumbnail of specified size and returns an HTML link to it
 631          * @param array $params Scaler parameters
 632          * @param int $width
 633          * @param int $height
 634          * @return string
 635          */
 636         private function makeSizeLink( $params, $width, $height ) {
 637                 $params['width'] = $width;
 638                 $params['height'] = $height;
 639                 $thumbnail = $this->displayImg->transform( $params );
 640                 if ( $thumbnail && !$thumbnail->isError() ) {
 641                         return Html::rawElement( 'a', array(
 642                                 'href' => $thumbnail->getUrl(),
 643                                 'class' => 'mw-thumbnail-link'
 644                                 ), $this->getContext()->msg( 'show-big-image-size' )->numParams(
 645                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 646                                 )->parse() );
 647                 } else {
 648                         return '';
 649                 }
 650         }
 651
 652         /**
 653          * Show a notice that the file is from a shared repository
 654          */
 655         protected function printSharedImageText() {
 656                 $out = $this->getContext()->getOutput();
 657                 $this->loadFile();
 658
 659                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 660                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 661
 662                 /* Add canonical to head if there is no local page for this shared file */
 663                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 664                         $out->setCanonicalUrl( $descUrl );
 665                 }
 666
 667                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 668                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 669
 670                 if ( $descUrl && $descText && $this->getContext()->msg( 'sharedupload-desc-here' )->plain() !== '-' ) {
 671                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 672                 } elseif ( $descUrl && $this->getContext()->msg( 'sharedupload-desc-there' )->plain() !== '-' ) {
 673                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 674                 } else {
 675                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 676                 }
 677
 678                 if ( $descText ) {
 679                         $this->mExtraDescription = $descText;
 680                 }
 681         }
 682
 683         public function getUploadUrl() {
 684                 $this->loadFile();
 685                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 686                 return $uploadTitle->getFullURL( array(
 687                         'wpDestFile' => $this->mPage->getFile()->getName(),
 688                         'wpForReUpload' => 1
 689                 ) );
 690         }
 691
 692         /**
 693          * Print out the various links at the bottom of the image page, e.g. reupload,
 694          * external editing (and instructions link) etc.
 695          */
 696         protected function uploadLinksBox() {
 697                 global $wgEnableUploads;
 698
 699                 if ( !$wgEnableUploads ) {
 700                         return;
 701                 }
 702
 703                 $this->loadFile();
 704                 if ( !$this->mPage->getFile()->isLocal() ) {
 705                         return;
 706                 }
 707
 708                 $out = $this->getContext()->getOutput();
 709                 $out->addHTML( "<ul>\n" );
 710
 711                 # "Upload a new version of this file" link
 712                 $canUpload = $this->getTitle()->quickUserCan( 'upload', $this->getContext()->getUser() );
 713                 if ( $canUpload && UploadBase::userCanReUpload(
 714                                 $this->getContext()->getUser(),
 715                                 $this->mPage->getFile()->name )
 716                 ) {
 717                         $ulink = Linker::makeExternalLink(
 718                                 $this->getUploadUrl(),
 719                                 $this->getContext()->msg( 'uploadnewversion-linktext' )->text()
 720                         );
 721                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\">"
 722                                 . "<div class=\"plainlinks\">{$ulink}</div></li>\n" );
 723                 } else {
 724                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">"
 725                                 . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 726                 }
 727
 728                 $out->addHTML( "</ul>\n" );
 729         }
 730
 731         /**
 732          * For overloading
 733          */
 734         protected function closeShowImage() {
 735         }
 736
 737         /**
 738          * If the page we've just displayed is in the "Image" namespace,
 739          * we follow it with an upload history of the image and its usage.
 740          */
 741         protected function imageHistory() {
 742                 $this->loadFile();
 743                 $out = $this->getContext()->getOutput();
 744                 $pager = new ImageHistoryPseudoPager( $this );
 745                 $out->addHTML( $pager->getBody() );
 746                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 747
 748                 $this->mPage->getFile()->resetHistory(); // free db resources
 749
 750                 # Exist check because we don't want to show this on pages where an image
 751                 # doesn't exist along with the noimage message, that would suck. -ævar
 752                 if ( $this->mPage->getFile()->exists() ) {
 753                         $this->uploadLinksBox();
 754                 }
 755         }
 756
 757         /**
 758          * @param string $target
 759          * @param int $limit
 760          * @return ResultWrapper
 761          */
 762         protected function queryImageLinks( $target, $limit ) {
 763                 $dbr = wfGetDB( DB_SLAVE );
 764
 765                 return $dbr->select(
 766                         array( 'imagelinks', 'page' ),
 767                         array( 'page_namespace', 'page_title', 'il_to' ),
 768                         array( 'il_to' => $target, 'il_from = page_id' ),
 769                         __METHOD__,
 770                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 771                 );
 772         }
 773
 774         protected function imageLinks() {
 775                 $limit = 100;
 776
 777                 $out = $this->getContext()->getOutput();
 778
 779                 $rows = array();
 780                 $redirects = array();
 781                 foreach ( $this->getTitle()->getRedirectsHere( NS_FILE ) as $redir ) {
 782                         $redirects[$redir->getDBkey()] = array();
 783                         $rows[] = (object)array(
 784                                 'page_namespace' => NS_FILE,
 785                                 'page_title' => $redir->getDBkey(),
 786                         );
 787                 }
 788
 789                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 790                 foreach ( $res as $row ) {
 791                         $rows[] = $row;
 792                 }
 793                 $count = count( $rows );
 794
 795                 $hasMore = $count > $limit;
 796                 if ( !$hasMore && count( $redirects ) ) {
 797                         $res = $this->queryImageLinks( array_keys( $redirects ),
 798                                 $limit - count( $rows ) + 1 );
 799                         foreach ( $res as $row ) {
 800                                 $redirects[$row->il_to][] = $row;
 801                                 $count++;
 802                         }
 803                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 804                 }
 805
 806                 if ( $count == 0 ) {
 807                         $out->wrapWikiMsg(
 808                                 Html::rawElement( 'div',
 809                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 810                                 'nolinkstoimage'
 811                         );
 812                         return;
 813                 }
 814
 815                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 816                 if ( !$hasMore ) {
 817                         $out->addWikiMsg( 'linkstoimage', $count );
 818                 } else {
 819                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 820                         $out->addWikiMsg( 'linkstoimage-more',
 821                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 822                                 $this->getTitle()->getPrefixedDBkey()
 823                         );
 824                 }
 825
 826                 $out->addHTML(
 827                         Html::openElement( 'ul',
 828                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 829                 );
 830                 $count = 0;
 831
 832                 // Sort the list by namespace:title
 833                 usort( $rows, array( $this, 'compare' ) );
 834
 835                 // Create links for every element
 836                 $currentCount = 0;
 837                 foreach ( $rows as $element ) {
 838                         $currentCount++;
 839                         if ( $currentCount > $limit ) {
 840                                 break;
 841                         }
 842
 843                         $query = array();
 844                         # Add a redirect=no to make redirect pages reachable
 845                         if ( isset( $redirects[$element->page_title] ) ) {
 846                                 $query['redirect'] = 'no';
 847                         }
 848                         $link = Linker::linkKnown(
 849                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 850                                 null, array(), $query
 851                         );
 852                         if ( !isset( $redirects[$element->page_title] ) ) {
 853                                 # No redirects
 854                                 $liContents = $link;
 855                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 856                                 # Redirect without usages
 857                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 858                         } else {
 859                                 # Redirect with usages
 860                                 $li = '';
 861                                 foreach ( $redirects[$element->page_title] as $row ) {
 862                                         $currentCount++;
 863                                         if ( $currentCount > $limit ) {
 864                                                 break;
 865                                         }
 866
 867                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 868                                         $li .= Html::rawElement(
 869                                                 'li',
 870                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 871                                                 $link2
 872                                                 ) . "\n";
 873                                 }
 874
 875                                 $ul = Html::rawElement(
 876                                         'ul',
 877                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 878                                         $li
 879                                         ) . "\n";
 880                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )->rawParams(
 881                                         $link, $ul )->parse();
 882                         }
 883                         $out->addHTML( Html::rawElement(
 884                                         'li',
 885                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 886                                         $liContents
 887                                 ) . "\n"
 888                         );
 889
 890                 };
 891                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 892                 $res->free();
 893
 894                 // Add a links to [[Special:Whatlinkshere]]
 895                 if ( $count > $limit ) {
 896                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 897                 }
 898                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 899         }
 900
 901         protected function imageDupes() {
 902                 $this->loadFile();
 903                 $out = $this->getContext()->getOutput();
 904
 905                 $dupes = $this->mPage->getDuplicates();
 906                 if ( count( $dupes ) == 0 ) {
 907                         return;
 908                 }
 909
 910                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 911                 $out->addWikiMsg( 'duplicatesoffile',
 912                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 913                 );
 914                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 915
 916                 /**
 917                  * @var $file File
 918                  */
 919                 foreach ( $dupes as $file ) {
 920                         $fromSrc = '';
 921                         if ( $file->isLocal() ) {
 922                                 $link = Linker::linkKnown( $file->getTitle() );
 923                         } else {
 924                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 925                                         $file->getTitle()->getPrefixedText() );
 926                                 $fromSrc = $this->getContext()->msg( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 927                         }
 928                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 929                 }
 930                 $out->addHTML( "</ul></div>\n" );
 931         }
 932
 933         /**
 934          * Delete the file, or an earlier version of it
 935          */
 936         public function delete() {
 937                 $file = $this->mPage->getFile();
 938                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 939                         // Standard article deletion
 940                         parent::delete();
 941                         return;
 942                 }
 943
 944                 $deleter = new FileDeleteForm( $file );
 945                 $deleter->execute();
 946         }
 947
 948         /**
 949          * Display an error with a wikitext description
 950          *
 951          * @param string $description
 952          */
 953         function showError( $description ) {
 954                 $out = $this->getContext()->getOutput();
 955                 $out->setPageTitle( $this->getContext()->msg( 'internalerror' ) );
 956                 $out->setRobotPolicy( 'noindex,nofollow' );
 957                 $out->setArticleRelated( false );
 958                 $out->enableClientCache( false );
 959                 $out->addWikiText( $description );
 960         }
 961
 962         /**
 963          * Callback for usort() to do link sorts by (namespace, title)
 964          * Function copied from Title::compare()
 965          *
 966          * @param object $a Object page to compare with
 967          * @param object $b Object page to compare with
 968          * @return int Result of string comparison, or namespace comparison
 969          */
 970         protected function compare( $a, $b ) {
 971                 if ( $a->page_namespace == $b->page_namespace ) {
 972                         return strcmp( $a->page_title, $b->page_title );
 973                 } else {
 974                         return $a->page_namespace - $b->page_namespace;
 975                 }
 976         }
 977
 978         /**
 979          * Returns the corresponding $wgImageLimits entry for the selected user option
 980          *
 981          * @param User $user
 982          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 983          * @return array
 984          * @since 1.21
 985          */
 986         public function getImageLimitsFromOption( $user, $optionName ) {
 987                 global $wgImageLimits;
 988
 989                 $option = $user->getIntOption( $optionName );
 990                 if ( !isset( $wgImageLimits[$option] ) ) {
 991                         $option = User::getDefaultOption( $optionName );
 992                 }
 993
 994                 // The user offset might still be incorrect, specially if
 995                 // $wgImageLimits got changed (see bug #8858).
 996                 if ( !isset( $wgImageLimits[$option] ) ) {
 997                         // Default to the first offset in $wgImageLimits
 998                         $option = 0;
 999                 }
1000
1001                 return isset( $wgImageLimits[$option] )
1002                         ? $wgImageLimits[$option]
1003                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
1004         }
1005
1006         /**
1007          * Output a drop-down box for language options for the file
1008          *
1009          * @param array $langChoices Array of string language codes
1010          * @param string $curLang Language code file is being viewed in.
1011          * @param string $defaultLang Language code that image is rendered in by default
1012          * @return string HTML to insert underneath image.
1013          */
1014         protected function doRenderLangOpt( array $langChoices, $curLang, $defaultLang ) {
1015                 global $wgScript;
1016                 sort( $langChoices );
1017                 $curLang = wfBCP47( $curLang );
1018                 $defaultLang = wfBCP47( $defaultLang );
1019                 $opts = '';
1020                 $haveCurrentLang = false;
1021                 $haveDefaultLang = false;
1022
1023                 // We make a list of all the language choices in the file.
1024                 // Additionally if the default language to render this file
1025                 // is not included as being in this file (for example, in svgs
1026                 // usually the fallback content is the english content) also
1027                 // include a choice for that. Last of all, if we're viewing
1028                 // the file in a language not on the list, add it as a choice.
1029                 foreach ( $langChoices as $lang ) {
1030                         $code = wfBCP47( $lang );
1031                         $name = Language::fetchLanguageName( $code, $this->getContext()->getLanguage()->getCode() );
1032                         if ( $name !== '' ) {
1033                                 $display = $this->getContext()->msg( 'img-lang-opt', $code, $name )->text();
1034                         } else {
1035                                 $display = $code;
1036                         }
1037                         $opts .= "\n" . Xml::option( $display, $code, $curLang === $code );
1038                         if ( $curLang === $code ) {
1039                                 $haveCurrentLang = true;
1040                         }
1041                         if ( $defaultLang === $code ) {
1042                                 $haveDefaultLang = true;
1043                         }
1044                 }
1045                 if ( !$haveDefaultLang ) {
1046                         // Its hard to know if the content is really in the default language, or
1047                         // if its just unmarked content that could be in any language.
1048                         $opts = Xml::option(
1049                                         $this->getContext()->msg( 'img-lang-default' )->text(),
1050                                 $defaultLang,
1051                                 $defaultLang === $curLang
1052                         ) . $opts;
1053                 }
1054                 if ( !$haveCurrentLang && $defaultLang !== $curLang ) {
1055                         $name = Language::fetchLanguageName( $curLang, $this->getContext()->getLanguage()->getCode() );
1056                         if ( $name !== '' ) {
1057                                 $display = $this->getContext()->msg( 'img-lang-opt', $curLang, $name )->text();
1058                         } else {
1059                                 $display = $curLang;
1060                         }
1061                         $opts = Xml::option( $display, $curLang, true ) . $opts;
1062                 }
1063
1064                 $select = Html::rawElement(
1065                         'select',
1066                         array( 'id' => 'mw-imglangselector', 'name' => 'lang' ),
1067                         $opts
1068                 );
1069                 $submit = Xml::submitButton( $this->getContext()->msg( 'img-lang-go' )->text() );
1070
1071                 $formContents = $this->getContext()->msg( 'img-lang-info' )->rawParams( $select, $submit )->parse()
1072                         . Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() );
1073
1074                 $langSelectLine = Html::rawElement( 'div', array( 'id' => 'mw-imglangselector-line' ),
1075                         Html::rawElement( 'form', array( 'action' => $wgScript ), $formContents )
1076                 );
1077                 return $langSelectLine;
1078         }
1079
1080         /**
1081          * Get the width and height to display image at.
1082          *
1083          * @note This method assumes that it is only called if one
1084          *  of the dimensions are bigger than the max, or if the
1085          *  image is vectorized.
1086          *
1087          * @param int $maxWidth Max width to display at
1088          * @param int $maxHeight Max height to display at
1089          * @param int $width Actual width of the image
1090          * @param int $height Actual height of the image
1091          * @throws MWException
1092          * @return array Array (width, height)
1093          */
1094         protected function getDisplayWidthHeight( $maxWidth, $maxHeight, $width, $height ) {
1095                 if ( !$maxWidth || !$maxHeight ) {
1096                         // should never happen
1097                         throw new MWException( 'Using a choice from $wgImageLimits that is 0x0' );
1098                 }
1099
1100                 if ( !$width || !$height ) {
1101                         return array( 0, 0 );
1102                 }
1103
1104                 # Calculate the thumbnail size.
1105                 if ( $width <= $maxWidth && $height <= $maxHeight ) {
1106                         // Vectorized image, do nothing.
1107                 } elseif ( $width / $height >= $maxWidth / $maxHeight ) {
1108                         # The limiting factor is the width, not the height.
1109                         $height = round( $height * $maxWidth / $width );
1110                         $width = $maxWidth;
1111                         # Note that $height <= $maxHeight now.
1112                 } else {
1113                         $newwidth = floor( $width * $maxHeight / $height );
1114                         $height = round( $height * $newwidth / $width );
1115                         $width = $newwidth;
1116                         # Note that $height <= $maxHeight now, but might not be identical
1117                         # because of rounding.
1118                 }
1119                 return array( $width, $height );
1120         }
1121
1122         /**
1123          * Get alternative thumbnail sizes.
1124          *
1125          * @note This will only list several alternatives if thumbnails are rendered on 404
1126          * @param int $origWidth Actual width of image
1127          * @param int $origHeight Actual height of image
1128          * @return array An array of [width, height] pairs.
1129          */
1130         protected function getThumbSizes( $origWidth, $origHeight ) {
1131                 global $wgImageLimits;
1132                 if ( $this->displayImg->getRepo()->canTransformVia404() ) {
1133                         $thumbSizes = $wgImageLimits;
1134                         // Also include the full sized resolution in the list, so
1135                         // that users know they can get it. This will link to the
1136                         // original file asset if mustRender() === false. In the case
1137                         // that we mustRender, some users have indicated that they would
1138                         // find it useful to have the full size image in the rendered
1139                         // image format.
1140                         $thumbSizes[] = array( $origWidth, $origHeight );
1141                 } else {
1142                         # Creating thumb links triggers thumbnail generation.
1143                         # Just generate the thumb for the current users prefs.
1144                         $thumbSizes = array( $this->getImageLimitsFromOption( $this->getContext()->getUser(), 'thumbsize' ) );
1145                         if ( !$this->displayImg->mustRender() ) {
1146                                 // We can safely include a link to the "full-size" preview,
1147                                 // without actually rendering.
1148                                 $thumbSizes[] = array( $origWidth, $origHeight );
1149                         }
1150                 }
1151                 return $thumbSizes;
1152         }
1153
1154 }
1155
1156 /**
1157  * Builds the image revision log shown on image pages
1158  *
1159  * @ingroup Media
1160  */
1161 class ImageHistoryList extends ContextSource {
1162
1163         /**
1164          * @var Title
1165          */
1166         protected $title;
1167
1168         /**
1169          * @var File
1170          */
1171         protected $img;
1172
1173         /**
1174          * @var ImagePage
1175          */
1176         protected $imagePage;
1177
1178         /**
1179          * @var File
1180          */
1181         protected $current;
1182
1183         protected $repo, $showThumb;
1184         protected $preventClickjacking = false;
1185
1186         /**
1187          * @param ImagePage $imagePage
1188          */
1189         public function __construct( $imagePage ) {
1190                 global $wgShowArchiveThumbnails;
1191                 $this->current = $imagePage->getFile();
1192                 $this->img = $imagePage->getDisplayedFile();
1193                 $this->title = $imagePage->getTitle();
1194                 $this->imagePage = $imagePage;
1195                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
1196                 $this->setContext( $imagePage->getContext() );
1197         }
1198
1199         /**
1200          * @return ImagePage
1201          */
1202         public function getImagePage() {
1203                 return $this->imagePage;
1204         }
1205
1206         /**
1207          * @return File
1208          */
1209         public function getFile() {
1210                 return $this->img;
1211         }
1212
1213         /**
1214          * @param string $navLinks
1215          * @return string
1216          */
1217         public function beginImageHistoryList( $navLinks = '' ) {
1218                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() )
1219                         . "\n"
1220                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1221                         . $this->msg( 'filehist-help' )->parseAsBlock()
1222                         . $navLinks . "\n"
1223                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1224                         . '<tr><th></th>'
1225                         . ( $this->current->isLocal()
1226                                 && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<th></th>' : '' )
1227                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1228                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1229                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1230                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1231                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1232                         . "</tr>\n";
1233         }
1234
1235         /**
1236          * @param string $navLinks
1237          * @return string
1238          */
1239         public function endImageHistoryList( $navLinks = '' ) {
1240                 return "</table>\n$navLinks\n</div>\n";
1241         }
1242
1243         /**
1244          * @param bool $iscur
1245          * @param File $file
1246          * @return string
1247          */
1248         public function imageHistoryLine( $iscur, $file ) {
1249                 global $wgContLang;
1250
1251                 $user = $this->getUser();
1252                 $lang = $this->getLanguage();
1253                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1254                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1255                 $userId = $file->getUser( 'id' );
1256                 $userText = $file->getUser( 'text' );
1257                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1258
1259                 $local = $this->current->isLocal();
1260                 $row = $selected = '';
1261
1262                 // Deletion link
1263                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1264                         $row .= '<td>';
1265                         # Link to remove from history
1266                         if ( $user->isAllowed( 'delete' ) ) {
1267                                 $q = array( 'action' => 'delete' );
1268                                 if ( !$iscur ) {
1269                                         $q['oldimage'] = $img;
1270                                 }
1271                                 $row .= Linker::linkKnown(
1272                                         $this->title,
1273                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1274                                         array(), $q
1275                                 );
1276                         }
1277                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1278                         $canHide = $user->isAllowed( 'deleterevision' );
1279                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1280                                 if ( $user->isAllowed( 'delete' ) ) {
1281                                         $row .= '<br />';
1282                                 }
1283                                 // If file is top revision or locked from this user, don't link
1284                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1285                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1286                                 } else {
1287                                         list( $ts, ) = explode( '!', $img, 2 );
1288                                         $query = array(
1289                                                 'type' => 'oldimage',
1290                                                 'target' => $this->title->getPrefixedText(),
1291                                                 'ids' => $ts,
1292                                         );
1293                                         $del = Linker::revDeleteLink( $query,
1294                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1295                                 }
1296                                 $row .= $del;
1297                         }
1298                         $row .= '</td>';
1299                 }
1300
1301                 // Reversion link/current indicator
1302                 $row .= '<td>';
1303                 if ( $iscur ) {
1304                         $row .= $this->msg( 'filehist-current' )->escaped();
1305                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1306                         && $this->title->quickUserCan( 'upload', $user )
1307                 ) {
1308                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1309                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1310                         } else {
1311                                 $row .= Linker::linkKnown(
1312                                         $this->title,
1313                                         $this->msg( 'filehist-revert' )->escaped(),
1314                                         array(),
1315                                         array(
1316                                                 'action' => 'revert',
1317                                                 'oldimage' => $img,
1318                                                 'wpEditToken' => $user->getEditToken( $img )
1319                                         )
1320                                 );
1321                         }
1322                 }
1323                 $row .= '</td>';
1324
1325                 // Date/time and image link
1326                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1327                         $selected = "class='filehistory-selected'";
1328                 }
1329                 $row .= "<td $selected style='white-space: nowrap;'>";
1330                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1331                         # Don't link to unviewable files
1332                         $row .= '<span class="history-deleted">'
1333                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1334                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1335                         if ( $local ) {
1336                                 $this->preventClickjacking();
1337                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1338                                 # Make a link to review the image
1339                                 $url = Linker::linkKnown(
1340                                         $revdel,
1341                                         $lang->userTimeAndDate( $timestamp, $user ),
1342                                         array(),
1343                                         array(
1344                                                 'target' => $this->title->getPrefixedText(),
1345                                                 'file' => $img,
1346                                                 'token' => $user->getEditToken( $img )
1347                                         )
1348                                 );
1349                         } else {
1350                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1351                         }
1352                         $row .= '<span class="history-deleted">' . $url . '</span>';
1353                 } elseif ( !$file->exists() ) {
1354                         $row .= '<span class="mw-file-missing">'
1355                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1356                 } else {
1357                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1358                         $row .= Xml::element(
1359                                 'a',
1360                                 array( 'href' => $url ),
1361                                 $lang->userTimeAndDate( $timestamp, $user )
1362                         );
1363                 }
1364                 $row .= "</td>";
1365
1366                 // Thumbnail
1367                 if ( $this->showThumb ) {
1368                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1369                 }
1370
1371                 // Image dimensions + size
1372                 $row .= '<td>';
1373                 $row .= htmlspecialchars( $file->getDimensionsString() );
1374                 $row .= $this->msg( 'word-separator' )->escaped();
1375                 $row .= '<span style="white-space: nowrap;">';
1376                 $row .= $this->msg( 'parentheses' )->sizeParams( $file->getSize() )->escaped();
1377                 $row .= '</span>';
1378                 $row .= '</td>';
1379
1380                 // Uploading user
1381                 $row .= '<td>';
1382                 // Hide deleted usernames
1383                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1384                         $row .= '<span class="history-deleted">'
1385                                 . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1386                 } else {
1387                         if ( $local ) {
1388                                 $row .= Linker::userLink( $userId, $userText );
1389                                 $row .= '<span style="white-space: nowrap;">';
1390                                 $row .= Linker::userToolLinks( $userId, $userText );
1391                                 $row .= '</span>';
1392                         } else {
1393                                 $row .= htmlspecialchars( $userText );
1394                         }
1395                 }
1396                 $row .= '</td>';
1397
1398                 // Don't show deleted descriptions
1399                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1400                         $row .= '<td><span class="history-deleted">' .
1401                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1402                 } else {
1403                         $row .= '<td dir="' . $wgContLang->getDir() . '">' .
1404                                 Linker::formatComment( $description, $this->title ) . '</td>';
1405                 }
1406
1407                 $rowClass = null;
1408                 Hooks::run( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1409                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1410
1411                 return "<tr{$classAttr}>{$row}</tr>\n";
1412         }
1413
1414         /**
1415          * @param File $file
1416          * @return string
1417          */
1418         protected function getThumbForLine( $file ) {
1419                 $lang = $this->getLanguage();
1420                 $user = $this->getUser();
1421                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1422                         && !$file->isDeleted( File::DELETED_FILE )
1423                 ) {
1424                         $params = array(
1425                                 'width' => '120',
1426                                 'height' => '120',
1427                         );
1428                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1429
1430                         $thumbnail = $file->transform( $params );
1431                         $options = array(
1432                                 'alt' => $this->msg( 'filehist-thumbtext',
1433                                         $lang->userTimeAndDate( $timestamp, $user ),
1434                                         $lang->userDate( $timestamp, $user ),
1435                                         $lang->userTime( $timestamp, $user ) )->text(),
1436                                 'file-link' => true,
1437                         );
1438
1439                         if ( !$thumbnail ) {
1440                                 return $this->msg( 'filehist-nothumb' )->escaped();
1441                         }
1442
1443                         return $thumbnail->toHtml( $options );
1444                 } else {
1445                         return $this->msg( 'filehist-nothumb' )->escaped();
1446                 }
1447         }
1448
1449         /**
1450          * @param bool $enable
1451          */
1452         protected function preventClickjacking( $enable = true ) {
1453                 $this->preventClickjacking = $enable;
1454         }
1455
1456         /**
1457          * @return bool
1458          */
1459         public function getPreventClickjacking() {
1460                 return $this->preventClickjacking;
1461         }
1462 }
1463
1464 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1465         protected $preventClickjacking = false;
1466
1467         /**
1468          * @var File
1469          */
1470         protected $mImg;
1471
1472         /**
1473          * @var Title
1474          */
1475         protected $mTitle;
1476
1477         /**
1478          * @param ImagePage $imagePage
1479          */
1480         function __construct( $imagePage ) {
1481                 parent::__construct( $imagePage->getContext() );
1482                 $this->mImagePage = $imagePage;
1483                 $this->mTitle = clone ( $imagePage->getTitle() );
1484                 $this->mTitle->setFragment( '#filehistory' );
1485                 $this->mImg = null;
1486                 $this->mHist = array();
1487                 $this->mRange = array( 0, 0 ); // display range
1488         }
1489
1490         /**
1491          * @return Title
1492          */
1493         function getTitle() {
1494                 return $this->mTitle;
1495         }
1496
1497         function getQueryInfo() {
1498                 return false;
1499         }
1500
1501         /**
1502          * @return string
1503          */
1504         function getIndexField() {
1505                 return '';
1506         }
1507
1508         /**
1509          * @param object $row
1510          * @return string
1511          */
1512         function formatRow( $row ) {
1513                 return '';
1514         }
1515
1516         /**
1517          * @return string
1518          */
1519         function getBody() {
1520                 $s = '';
1521                 $this->doQuery();
1522                 if ( count( $this->mHist ) ) {
1523                         if ( $this->mImg->isLocal() ) {
1524                                 // Do a batch existence check for user pages and talkpages
1525                                 $linkBatch = new LinkBatch();
1526                                 for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1527                                         $file = $this->mHist[$i];
1528                                         $user = $file->getUser( 'text' );
1529                                         $linkBatch->add( NS_USER, $user );
1530                                         $linkBatch->add( NS_USER_TALK, $user );
1531                                 }
1532                                 $linkBatch->execute();
1533                         }
1534
1535                         $list = new ImageHistoryList( $this->mImagePage );
1536                         # Generate prev/next links
1537                         $navLink = $this->getNavigationBar();
1538                         $s = $list->beginImageHistoryList( $navLink );
1539                         // Skip rows there just for paging links
1540                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1541                                 $file = $this->mHist[$i];
1542                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1543                         }
1544                         $s .= $list->endImageHistoryList( $navLink );
1545
1546                         if ( $list->getPreventClickjacking() ) {
1547                                 $this->preventClickjacking();
1548                         }
1549                 }
1550                 return $s;
1551         }
1552
1553         function doQuery() {
1554                 if ( $this->mQueryDone ) {
1555                         return;
1556                 }
1557                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1558                 if ( !$this->mImg->exists() ) {
1559                         return;
1560                 }
1561                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1562                 if ( $this->mIsBackwards ) {
1563                         // Fetch the file history
1564                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1565                         // The current rev may not meet the offset/limit
1566                         $numRows = count( $this->mHist );
1567                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1568                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1569                         }
1570                 } else {
1571                         // The current rev may not meet the offset
1572                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1573                                 $this->mHist[] = $this->mImg;
1574                         }
1575                         // Old image versions (fetch extra row for nav links)
1576                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1577                         // Fetch the file history
1578                         $this->mHist = array_merge( $this->mHist,
1579                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1580                 }
1581                 $numRows = count( $this->mHist ); // Total number of query results
1582                 if ( $numRows ) {
1583                         # Index value of top item in the list
1584                         $firstIndex = $this->mIsBackwards ?
1585                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1586                         # Discard the extra result row if there is one
1587                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1588                                 if ( $this->mIsBackwards ) {
1589                                         # Index value of item past the index
1590                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1591                                         # Index value of bottom item in the list
1592                                         $lastIndex = $this->mHist[1]->getTimestamp();
1593                                         # Display range
1594                                         $this->mRange = array( 1, $numRows - 1 );
1595                                 } else {
1596                                         # Index value of item past the index
1597                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1598                                         # Index value of bottom item in the list
1599                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1600                                         # Display range
1601                                         $this->mRange = array( 0, $numRows - 2 );
1602                                 }
1603                         } else {
1604                                 # Setting indexes to an empty string means that they will be
1605                                 # omitted if they would otherwise appear in URLs. It just so
1606                                 # happens that this  is the right thing to do in the standard
1607                                 # UI, in all the relevant cases.
1608                                 $this->mPastTheEndIndex = '';
1609                                 # Index value of bottom item in the list
1610                                 $lastIndex = $this->mIsBackwards ?
1611                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1612                                 # Display range
1613                                 $this->mRange = array( 0, $numRows - 1 );
1614                         }
1615                 } else {
1616                         $firstIndex = '';
1617                         $lastIndex = '';
1618                         $this->mPastTheEndIndex = '';
1619                 }
1620                 if ( $this->mIsBackwards ) {
1621                         $this->mIsFirst = ( $numRows < $queryLimit );
1622                         $this->mIsLast = ( $this->mOffset == '' );
1623                         $this->mLastShown = $firstIndex;
1624                         $this->mFirstShown = $lastIndex;
1625                 } else {
1626                         $this->mIsFirst = ( $this->mOffset == '' );
1627                         $this->mIsLast = ( $numRows < $queryLimit );
1628                         $this->mLastShown = $lastIndex;
1629                         $this->mFirstShown = $firstIndex;
1630                 }
1631                 $this->mQueryDone = true;
1632         }
1633
1634         /**
1635          * @param bool $enable
1636          */
1637         protected function preventClickjacking( $enable = true ) {
1638                 $this->preventClickjacking = $enable;
1639         }
1640
1641         /**
1642          * @return bool
1643          */
1644         public function getPreventClickjacking() {
1645                 return $this->preventClickjacking;
1646         }
1647
1648 }