includes/page/ImagePage.php

   1 <?php
   2 /**
   3  * Special handling for file description pages.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Class for viewing MediaWiki file description pages
  25  *
  26  * @ingroup Media
  27  */
  28 class ImagePage extends Article {
  29         /** @var File */
  30         private $displayImg;
  31
  32         /** @var FileRepo */
  33         private $repo;
  34
  35         /** @var bool */
  36         private $fileLoaded;
  37
  38         /** @var bool */
  39         protected $mExtraDescription = false;
  40
  41         /**
  42          * @param Title $title
  43          * @return WikiFilePage
  44          */
  45         protected function newPage( Title $title ) {
  46                 // Overload mPage with a file-specific page
  47                 return new WikiFilePage( $title );
  48         }
  49
  50         /**
  51          * Constructor from a page id
  52          * @param int $id Article ID to load
  53          * @return ImagePage|null
  54          */
  55         public static function newFromID( $id ) {
  56                 $t = Title::newFromID( $id );
  57                 # @todo FIXME: Doesn't inherit right
  58                 return $t == null ? null : new self( $t );
  59                 # return $t == null ? null : new static( $t ); // PHP 5.3
  60         }
  61
  62         /**
  63          * @param File $file
  64          * @return void
  65          */
  66         public function setFile( $file ) {
  67                 $this->mPage->setFile( $file );
  68                 $this->displayImg = $file;
  69                 $this->fileLoaded = true;
  70         }
  71
  72         protected function loadFile() {
  73                 if ( $this->fileLoaded ) {
  74                         return;
  75                 }
  76                 $this->fileLoaded = true;
  77
  78                 $this->displayImg = $img = false;
  79                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  80                 if ( !$img ) { // not set by hook?
  81                         $img = wfFindFile( $this->getTitle() );
  82                         if ( !$img ) {
  83                                 $img = wfLocalFile( $this->getTitle() );
  84                         }
  85                 }
  86                 $this->mPage->setFile( $img );
  87                 if ( !$this->displayImg ) { // not set by hook?
  88                         $this->displayImg = $img;
  89                 }
  90                 $this->repo = $img->getRepo();
  91         }
  92
  93         /**
  94          * Handler for action=render
  95          * Include body text only; none of the image extras
  96          */
  97         public function render() {
  98                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
  99                 parent::view();
 100         }
 101
 102         public function view() {
 103                 global $wgShowEXIF;
 104
 105                 $out = $this->getContext()->getOutput();
 106                 $request = $this->getContext()->getRequest();
 107                 $diff = $request->getVal( 'diff' );
 108                 $diffOnly = $request->getBool(
 109                         'diffonly',
 110                         $this->getContext()->getUser()->getOption( 'diffonly' )
 111                 );
 112
 113                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( $diff !== null && $diffOnly ) ) {
 114                         parent::view();
 115                         return;
 116                 }
 117
 118                 $this->loadFile();
 119
 120                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
 121                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || $diff !== null ) {
 122                                 // mTitle is the same as the redirect target so ask Article
 123                                 // to perform the redirect for us.
 124                                 $request->setVal( 'diffonly', 'true' );
 125                                 parent::view();
 126                                 return;
 127                         } else {
 128                                 // mTitle is not the same as the redirect target so it is
 129                                 // probably the redirect page itself. Fake the redirect symbol
 130                                 $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 131                                 $out->addHTML( $this->viewRedirect(
 132                                         Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 133                                         /* $appendSubtitle */ true,
 134                                         /* $forceKnown */ true )
 135                                 );
 136                                 $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 137                                 return;
 138                         }
 139                 }
 140
 141                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 142                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 143                         $formattedMetadata = $this->displayImg->formatMetadata();
 144                         $showmeta = $formattedMetadata !== false;
 145                 } else {
 146                         $showmeta = false;
 147                 }
 148
 149                 if ( !$diff && $this->displayImg->exists() ) {
 150                         $out->addHTML( $this->showTOC( $showmeta ) );
 151                 }
 152
 153                 if ( !$diff ) {
 154                         $this->openShowImage();
 155                 }
 156
 157                 # No need to display noarticletext, we use our own message, output in openShowImage()
 158                 if ( $this->mPage->getID() ) {
 159                         # NS_FILE is in the user language, but this section (the actual wikitext)
 160                         # should be in page content language
 161                         $pageLang = $this->getTitle()->getPageViewLanguage();
 162                         $out->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 163                                 'lang' => $pageLang->getHtmlCode(), 'dir' => $pageLang->getDir(),
 164                                 'class' => 'mw-content-' . $pageLang->getDir() ) ) );
 165
 166                         parent::view();
 167
 168                         $out->addHTML( Xml::closeElement( 'div' ) );
 169                 } else {
 170                         # Just need to set the right headers
 171                         $out->setArticleFlag( true );
 172                         $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 173                         $this->mPage->doViewUpdates( $this->getContext()->getUser(), $this->getOldID() );
 174                 }
 175
 176                 # Show shared description, if needed
 177                 if ( $this->mExtraDescription ) {
 178                         $fol = wfMessage( 'shareddescriptionfollows' );
 179                         if ( !$fol->isDisabled() ) {
 180                                 $out->addWikiText( $fol->plain() );
 181                         }
 182                         $out->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 183                 }
 184
 185                 $this->closeShowImage();
 186                 $this->imageHistory();
 187                 // TODO: Cleanup the following
 188
 189                 $out->addHTML( Xml::element( 'h2',
 190                         array( 'id' => 'filelinks' ),
 191                         wfMessage( 'imagelinks' )->text() ) . "\n" );
 192                 $this->imageDupes();
 193                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 194                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 195                 $this->imageLinks();
 196
 197                 # Allow extensions to add something after the image links
 198                 $html = '';
 199                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 200                 if ( $html ) {
 201                         $out->addHTML( $html );
 202                 }
 203
 204                 if ( $showmeta ) {
 205                         $out->addHTML( Xml::element(
 206                                 'h2',
 207                                 array( 'id' => 'metadata' ),
 208                                 wfMessage( 'metadata' )->text() ) . "\n" );
 209                         $out->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 210                         $out->addModules( array( 'mediawiki.action.view.metadata' ) );
 211                 }
 212
 213                 // Add remote Filepage.css
 214                 if ( !$this->repo->isLocal() ) {
 215                         $css = $this->repo->getDescriptionStylesheetUrl();
 216                         if ( $css ) {
 217                                 $out->addStyle( $css );
 218                         }
 219                 }
 220                 // always show the local local Filepage.css, bug 29277
 221                 $out->addModuleStyles( 'filepage' );
 222         }
 223
 224         /**
 225          * @return File
 226          */
 227         public function getDisplayedFile() {
 228                 $this->loadFile();
 229                 return $this->displayImg;
 230         }
 231
 232         /**
 233          * Create the TOC
 234          *
 235          * @param bool $metadata Whether or not to show the metadata link
 236          * @return string
 237          */
 238         protected function showTOC( $metadata ) {
 239                 $r = array(
 240                         '<li><a href="#file">' . wfMessage( 'file-anchor-link' )->escaped() . '</a></li>',
 241                         '<li><a href="#filehistory">' . wfMessage( 'filehist' )->escaped() . '</a></li>',
 242                         '<li><a href="#filelinks">' . wfMessage( 'imagelinks' )->escaped() . '</a></li>',
 243                 );
 244                 if ( $metadata ) {
 245                         $r[] = '<li><a href="#metadata">' . wfMessage( 'metadata' )->escaped() . '</a></li>';
 246                 }
 247
 248                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 249
 250                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 251         }
 252
 253         /**
 254          * Make a table with metadata to be shown in the output page.
 255          *
 256          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 257          *
 258          * @param array $metadata The array containing the Exif data
 259          * @return string The metadata table. This is treated as Wikitext (!)
 260          */
 261         protected function makeMetadataTable( $metadata ) {
 262                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 263                 $r .= wfMessage( 'metadata-help' )->plain();
 264                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 265                 foreach ( $metadata as $type => $stuff ) {
 266                         foreach ( $stuff as $v ) {
 267                                 # @todo FIXME: Why is this using escapeId for a class?!
 268                                 $class = Sanitizer::escapeId( $v['id'] );
 269                                 if ( $type == 'collapsed' ) {
 270                                         // Handled by mediawiki.action.view.metadata module
 271                                         // and skins/common/shared.css.
 272                                         $class .= ' collapsable';
 273                                 }
 274                                 $r .= "<tr class=\"$class\">\n";
 275                                 $r .= "<th>{$v['name']}</th>\n";
 276                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 277                         }
 278                 }
 279                 $r .= "</table>\n</div>\n";
 280                 return $r;
 281         }
 282
 283         /**
 284          * Overloading Article's getContentObject method.
 285          *
 286          * Omit noarticletext if sharedupload; text will be fetched from the
 287          * shared upload server if possible.
 288          * @return string
 289          */
 290         public function getContentObject() {
 291                 $this->loadFile();
 292                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 293                         return null;
 294                 }
 295                 return parent::getContentObject();
 296         }
 297
 298         protected function openShowImage() {
 299                 global $wgEnableUploads, $wgSend404Code;
 300
 301                 $this->loadFile();
 302                 $out = $this->getContext()->getOutput();
 303                 $user = $this->getContext()->getUser();
 304                 $lang = $this->getContext()->getLanguage();
 305                 $dirmark = $lang->getDirMarkEntity();
 306                 $request = $this->getContext()->getRequest();
 307
 308                 $max = $this->getImageLimitsFromOption( $user, 'imagesize' );
 309                 $maxWidth = $max[0];
 310                 $maxHeight = $max[1];
 311
 312                 if ( $this->displayImg->exists() ) {
 313                         # image
 314                         $page = $request->getIntOrNull( 'page' );
 315                         if ( is_null( $page ) ) {
 316                                 $params = array();
 317                                 $page = 1;
 318                         } else {
 319                                 $params = array( 'page' => $page );
 320                         }
 321
 322                         $renderLang = $request->getVal( 'lang' );
 323                         if ( !is_null( $renderLang ) ) {
 324                                 $handler = $this->displayImg->getHandler();
 325                                 if ( $handler && $handler->validateParam( 'lang', $renderLang ) ) {
 326                                         $params['lang'] = $renderLang;
 327                                 } else {
 328                                         $renderLang = null;
 329                                 }
 330                         }
 331
 332                         $width_orig = $this->displayImg->getWidth( $page );
 333                         $width = $width_orig;
 334                         $height_orig = $this->displayImg->getHeight( $page );
 335                         $height = $height_orig;
 336
 337                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 338                         $linktext = $filename;
 339
 340                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 341
 342                         if ( $this->displayImg->allowInlineDisplay() ) {
 343                                 # image
 344                                 # "Download high res version" link below the image
 345                                 # $msgsize = wfMessage( '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 = wfMessage( 'show-big-image' )->escaped();
 353
 354                                         $thumbSizes = $this->getThumbSizes( $width, $height, $width_orig, $height_orig );
 355                                         # Generate thumbnails or thumbnail links as needed...
 356                                         $otherSizes = array();
 357                                         foreach ( $thumbSizes as $size ) {
 358                                                 // We include a thumbnail size in the list, if it is
 359                                                 // less than or equal to the original size of the image
 360                                                 // asset ($width_orig/$height_orig). We also exclude
 361                                                 // the current thumbnail's size ($width/$height)
 362                                                 // since that is added to the message separately, so
 363                                                 // it can be denoted as the current size being shown.
 364                                                 // Vectorized images are "infinitely" big, so all thumb
 365                                                 // sizes are shown.
 366                                                 if ( ( ( $size[0] <= $width_orig && $size[1] <= $height_orig )
 367                                                                 || $this->displayImg->isVectorized() )
 368                                                         && $size[0] != $width && $size[1] != $height
 369                                                 ) {
 370                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 371                                                         if ( $sizeLink ) {
 372                                                                 $otherSizes[] = $sizeLink;
 373                                                         }
 374                                                 }
 375                                         }
 376                                         $otherSizes = array_unique( $otherSizes );
 377
 378                                         $msgsmall = '';
 379                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 380                                         if ( $sizeLinkBigImagePreview ) {
 381                                                 $msgsmall .= wfMessage( 'show-big-image-preview' )->
 382                                                         rawParams( $sizeLinkBigImagePreview )->
 383                                                         parse();
 384                                         }
 385                                         if ( count( $otherSizes ) ) {
 386                                                 $msgsmall .= ' ' .
 387                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 388                                                         wfMessage( 'show-big-image-other' )->rawParams( $lang->pipeList( $otherSizes ) )->
 389                                                         params( count( $otherSizes ) )->parse()
 390                                                 );
 391                                         }
 392                                 } elseif ( $width == 0 && $height == 0 ) {
 393                                         # Some sort of audio file that doesn't have dimensions
 394                                         # Don't output a no hi res message for such a file
 395                                         $msgsmall = '';
 396                                 } else {
 397                                         # Image is small enough to show full size on image page
 398                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 399                                 }
 400
 401                                 $params['width'] = $width;
 402                                 $params['height'] = $height;
 403                                 $thumbnail = $this->displayImg->transform( $params );
 404                                 Linker::processResponsiveImages( $this->displayImg, $thumbnail, $params );
 405
 406                                 $anchorclose = Html::rawElement(
 407                                         'div',
 408                                         array( 'class' => 'mw-filepage-resolutioninfo' ),
 409                                         $msgsmall
 410                                 );
 411
 412                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 413                                 if ( $isMulti ) {
 414                                         $out->addModules( 'mediawiki.page.image.pagination' );
 415                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 416                                 }
 417
 418                                 if ( $thumbnail ) {
 419                                         $options = array(
 420                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 421                                                 'file-link' => true,
 422                                         );
 423                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 424                                                 $thumbnail->toHtml( $options ) .
 425                                                 $anchorclose . "</div>\n" );
 426                                 }
 427
 428                                 if ( $isMulti ) {
 429                                         $count = $this->displayImg->pageCount();
 430
 431                                         if ( $page > 1 ) {
 432                                                 $label = $out->parse( wfMessage( 'imgmultipageprev' )->text(), false );
 433                                                 $link = Linker::linkKnown(
 434                                                         $this->getTitle(),
 435                                                         $label,
 436                                                         array(),
 437                                                         array( 'page' => $page - 1 )
 438                                                 );
 439                                                 $thumb1 = Linker::makeThumbLinkObj(
 440                                                         $this->getTitle(),
 441                                                         $this->displayImg,
 442                                                         $link,
 443                                                         $label,
 444                                                         'none',
 445                                                         array( 'page' => $page - 1 )
 446                                                 );
 447                                         } else {
 448                                                 $thumb1 = '';
 449                                         }
 450
 451                                         if ( $page < $count ) {
 452                                                 $label = wfMessage( 'imgmultipagenext' )->text();
 453                                                 $link = Linker::linkKnown(
 454                                                         $this->getTitle(),
 455                                                         $label,
 456                                                         array(),
 457                                                         array( 'page' => $page + 1 )
 458                                                 );
 459                                                 $thumb2 = Linker::makeThumbLinkObj(
 460                                                         $this->getTitle(),
 461                                                         $this->displayImg,
 462                                                         $link,
 463                                                         $label,
 464                                                         'none',
 465                                                         array( 'page' => $page + 1 )
 466                                                 );
 467                                         } else {
 468                                                 $thumb2 = '';
 469                                         }
 470
 471                                         global $wgScript;
 472
 473                                         $formParams = array(
 474                                                 'name' => 'pageselector',
 475                                                 'action' => $wgScript,
 476                                         );
 477                                         $options = array();
 478                                         for ( $i = 1; $i <= $count; $i++ ) {
 479                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 480                                         }
 481                                         $select = Xml::tags( 'select',
 482                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 483                                                 implode( "\n", $options ) );
 484
 485                                         $out->addHTML(
 486                                                 '</td><td><div class="multipageimagenavbox">' .
 487                                                 Xml::openElement( 'form', $formParams ) .
 488                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 489                                                         wfMessage( 'imgmultigoto' )->rawParams( $select )->parse() .
 490                                                 Xml::submitButton( wfMessage( 'imgmultigo' )->text() ) .
 491                                                 Xml::closeElement( 'form' ) .
 492                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 493                                         );
 494                                 }
 495                         } elseif ( $this->displayImg->isSafeFile() ) {
 496                                 # if direct link is allowed but it's not a renderable image, show an icon.
 497                                 $icon = $this->displayImg->iconThumb();
 498
 499                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 500                                         $icon->toHtml( array( 'file-link' => true ) ) .
 501                                         "</div>\n" );
 502                         }
 503
 504                         $longDesc = wfMessage( 'parentheses', $this->displayImg->getLongDesc() )->text();
 505
 506                         $medialink = "[[Media:$filename|$linktext]]";
 507
 508                         if ( !$this->displayImg->isSafeFile() ) {
 509                                 $warning = wfMessage( 'mediawarning' )->plain();
 510                                 // dirmark is needed here to separate the file name, which
 511                                 // most likely ends in Latin characters, from the description,
 512                                 // which may begin with the file type. In RTL environment
 513                                 // this will get messy.
 514                                 // The dirmark, however, must not be immediately adjacent
 515                                 // to the filename, because it can get copied with it.
 516                                 // See bug 25277.
 517                                 // @codingStandardsIgnoreStart Ignore long line
 518                                 $out->addWikiText( <<<EOT
 519 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 520 <div class="mediaWarning">$warning</div>
 521 EOT
 522                                 );
 523                                 // @codingStandardsIgnoreEnd
 524                         } else {
 525                                 $out->addWikiText( <<<EOT
 526 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 527 </div>
 528 EOT
 529                                 );
 530                         }
 531
 532                         $renderLangOptions = $this->displayImg->getAvailableLanguages();
 533                         if ( count( $renderLangOptions ) >= 1 ) {
 534                                 $currentLanguage = $renderLang;
 535                                 $defaultLang = $this->displayImg->getDefaultRenderLanguage();
 536                                 if ( is_null( $currentLanguage ) ) {
 537                                         $currentLanguage = $defaultLang;
 538                                 }
 539                                 $out->addHtml( $this->doRenderLangOpt( $renderLangOptions, $currentLanguage, $defaultLang ) );
 540                         }
 541
 542                         // Add cannot animate thumbnail warning
 543                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 544                                 // Include the extension so wiki admins can
 545                                 // customize it on a per file-type basis
 546                                 // (aka say things like use format X instead).
 547                                 // additionally have a specific message for
 548                                 // file-no-thumb-animation-gif
 549                                 $ext = $this->displayImg->getExtension();
 550                                 $noAnimMesg = wfMessageFallback(
 551                                         'file-no-thumb-animation-' . $ext,
 552                                         'file-no-thumb-animation'
 553                                 )->plain();
 554
 555                                 $out->addWikiText( <<<EOT
 556 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 557 EOT
 558                                 );
 559                         }
 560
 561                         if ( !$this->displayImg->isLocal() ) {
 562                                 $this->printSharedImageText();
 563                         }
 564                 } else {
 565                         # Image does not exist
 566                         if ( !$this->getID() ) {
 567                                 # No article exists either
 568                                 # Show deletion log to be consistent with normal articles
 569                                 LogEventsList::showLogExtract(
 570                                         $out,
 571                                         array( 'delete', 'move' ),
 572                                         $this->getTitle()->getPrefixedText(),
 573                                         '',
 574                                         array( 'lim' => 10,
 575                                                 'conds' => array( "log_action != 'revision'" ),
 576                                                 'showIfEmpty' => false,
 577                                                 'msgKey' => array( 'moveddeleted-notice' )
 578                                         )
 579                                 );
 580                         }
 581
 582                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 583                                 // Only show an upload link if the user can upload
 584                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 585                                 $nofile = array(
 586                                         'filepage-nofile-link',
 587                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 588                                 );
 589                         } else {
 590                                 $nofile = 'filepage-nofile';
 591                         }
 592                         // Note, if there is an image description page, but
 593                         // no image, then this setRobotPolicy is overridden
 594                         // by Article::View().
 595                         $out->setRobotPolicy( 'noindex,nofollow' );
 596                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 597                         if ( !$this->getID() && $wgSend404Code ) {
 598                                 // If there is no image, no shared image, and no description page,
 599                                 // output a 404, to be consistent with articles.
 600                                 $request->response()->header( 'HTTP/1.1 404 Not Found' );
 601                         }
 602                 }
 603                 $out->setFileVersion( $this->displayImg );
 604         }
 605
 606         /**
 607          * Creates an thumbnail of specified size and returns an HTML link to it
 608          * @param array $params Scaler parameters
 609          * @param int $width
 610          * @param int $height
 611          * @return string
 612          */
 613         private function makeSizeLink( $params, $width, $height ) {
 614                 $params['width'] = $width;
 615                 $params['height'] = $height;
 616                 $thumbnail = $this->displayImg->transform( $params );
 617                 if ( $thumbnail && !$thumbnail->isError() ) {
 618                         return Html::rawElement( 'a', array(
 619                                 'href' => $thumbnail->getUrl(),
 620                                 'class' => 'mw-thumbnail-link'
 621                                 ), wfMessage( 'show-big-image-size' )->numParams(
 622                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 623                                 )->parse() );
 624                 } else {
 625                         return '';
 626                 }
 627         }
 628
 629         /**
 630          * Show a notice that the file is from a shared repository
 631          */
 632         protected function printSharedImageText() {
 633                 $out = $this->getContext()->getOutput();
 634                 $this->loadFile();
 635
 636                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 637                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 638
 639                 /* Add canonical to head if there is no local page for this shared file */
 640                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 641                         $out->setCanonicalUrl( $descUrl );
 642                 }
 643
 644                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 645                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 646
 647                 if ( $descUrl && $descText && wfMessage( 'sharedupload-desc-here' )->plain() !== '-' ) {
 648                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 649                 } elseif ( $descUrl && wfMessage( 'sharedupload-desc-there' )->plain() !== '-' ) {
 650                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 651                 } else {
 652                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 653                 }
 654
 655                 if ( $descText ) {
 656                         $this->mExtraDescription = $descText;
 657                 }
 658         }
 659
 660         public function getUploadUrl() {
 661                 $this->loadFile();
 662                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 663                 return $uploadTitle->getFullURL( array(
 664                         'wpDestFile' => $this->mPage->getFile()->getName(),
 665                         'wpForReUpload' => 1
 666                 ) );
 667         }
 668
 669         /**
 670          * Print out the various links at the bottom of the image page, e.g. reupload,
 671          * external editing (and instructions link) etc.
 672          */
 673         protected function uploadLinksBox() {
 674                 global $wgEnableUploads;
 675
 676                 if ( !$wgEnableUploads ) {
 677                         return;
 678                 }
 679
 680                 $this->loadFile();
 681                 if ( !$this->mPage->getFile()->isLocal() ) {
 682                         return;
 683                 }
 684
 685                 $out = $this->getContext()->getOutput();
 686                 $out->addHTML( "<ul>\n" );
 687
 688                 # "Upload a new version of this file" link
 689                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 690                 if ( $canUpload && UploadBase::userCanReUpload(
 691                                 $this->getContext()->getUser(),
 692                                 $this->mPage->getFile()->name )
 693                 ) {
 694                         $ulink = Linker::makeExternalLink(
 695                                 $this->getUploadUrl(),
 696                                 wfMessage( 'uploadnewversion-linktext' )->text()
 697                         );
 698                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\">"
 699                                 . "<div class=\"plainlinks\">{$ulink}</div></li>\n" );
 700                 } else {
 701                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">"
 702                                 . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 703                 }
 704
 705                 $out->addHTML( "</ul>\n" );
 706         }
 707
 708         /**
 709          * For overloading
 710          */
 711         protected function closeShowImage() {
 712         }
 713
 714         /**
 715          * If the page we've just displayed is in the "Image" namespace,
 716          * we follow it with an upload history of the image and its usage.
 717          */
 718         protected function imageHistory() {
 719                 $this->loadFile();
 720                 $out = $this->getContext()->getOutput();
 721                 $pager = new ImageHistoryPseudoPager( $this );
 722                 $out->addHTML( $pager->getBody() );
 723                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 724
 725                 $this->mPage->getFile()->resetHistory(); // free db resources
 726
 727                 # Exist check because we don't want to show this on pages where an image
 728                 # doesn't exist along with the noimage message, that would suck. -ævar
 729                 if ( $this->mPage->getFile()->exists() ) {
 730                         $this->uploadLinksBox();
 731                 }
 732         }
 733
 734         /**
 735          * @param string $target
 736          * @param int $limit
 737          * @return ResultWrapper
 738          */
 739         protected function queryImageLinks( $target, $limit ) {
 740                 $dbr = wfGetDB( DB_SLAVE );
 741
 742                 return $dbr->select(
 743                         array( 'imagelinks', 'page' ),
 744                         array( 'page_namespace', 'page_title', 'il_to' ),
 745                         array( 'il_to' => $target, 'il_from = page_id' ),
 746                         __METHOD__,
 747                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 748                 );
 749         }
 750
 751         protected function imageLinks() {
 752                 $limit = 100;
 753
 754                 $out = $this->getContext()->getOutput();
 755
 756                 $rows = array();
 757                 $redirects = array();
 758                 foreach ( $this->getTitle()->getRedirectsHere( NS_FILE ) as $redir ) {
 759                         $redirects[$redir->getDBkey()] = array();
 760                         $rows[] = (object)array(
 761                                 'page_namespace' => NS_FILE,
 762                                 'page_title' => $redir->getDBkey(),
 763                         );
 764                 }
 765
 766                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 767                 foreach ( $res as $row ) {
 768                         $rows[] = $row;
 769                 }
 770                 $count = count( $rows );
 771
 772                 $hasMore = $count > $limit;
 773                 if ( !$hasMore && count( $redirects ) ) {
 774                         $res = $this->queryImageLinks( array_keys( $redirects ),
 775                                 $limit - count( $rows ) + 1 );
 776                         foreach ( $res as $row ) {
 777                                 $redirects[$row->il_to][] = $row;
 778                                 $count++;
 779                         }
 780                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 781                 }
 782
 783                 if ( $count == 0 ) {
 784                         $out->wrapWikiMsg(
 785                                 Html::rawElement( 'div',
 786                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 787                                 'nolinkstoimage'
 788                         );
 789                         return;
 790                 }
 791
 792                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 793                 if ( !$hasMore ) {
 794                         $out->addWikiMsg( 'linkstoimage', $count );
 795                 } else {
 796                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 797                         $out->addWikiMsg( 'linkstoimage-more',
 798                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 799                                 $this->getTitle()->getPrefixedDBkey()
 800                         );
 801                 }
 802
 803                 $out->addHTML(
 804                         Html::openElement( 'ul',
 805                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 806                 );
 807                 $count = 0;
 808
 809                 // Sort the list by namespace:title
 810                 usort( $rows, array( $this, 'compare' ) );
 811
 812                 // Create links for every element
 813                 $currentCount = 0;
 814                 foreach ( $rows as $element ) {
 815                         $currentCount++;
 816                         if ( $currentCount > $limit ) {
 817                                 break;
 818                         }
 819
 820                         $query = array();
 821                         # Add a redirect=no to make redirect pages reachable
 822                         if ( isset( $redirects[$element->page_title] ) ) {
 823                                 $query['redirect'] = 'no';
 824                         }
 825                         $link = Linker::linkKnown(
 826                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 827                                 null, array(), $query
 828                         );
 829                         if ( !isset( $redirects[$element->page_title] ) ) {
 830                                 # No redirects
 831                                 $liContents = $link;
 832                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 833                                 # Redirect without usages
 834                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 835                         } else {
 836                                 # Redirect with usages
 837                                 $li = '';
 838                                 foreach ( $redirects[$element->page_title] as $row ) {
 839                                         $currentCount++;
 840                                         if ( $currentCount > $limit ) {
 841                                                 break;
 842                                         }
 843
 844                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 845                                         $li .= Html::rawElement(
 846                                                 'li',
 847                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 848                                                 $link2
 849                                                 ) . "\n";
 850                                 }
 851
 852                                 $ul = Html::rawElement(
 853                                         'ul',
 854                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 855                                         $li
 856                                         ) . "\n";
 857                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 858                                         $link, $ul )->parse();
 859                         }
 860                         $out->addHTML( Html::rawElement(
 861                                         'li',
 862                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 863                                         $liContents
 864                                 ) . "\n"
 865                         );
 866
 867                 };
 868                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 869                 $res->free();
 870
 871                 // Add a links to [[Special:Whatlinkshere]]
 872                 if ( $count > $limit ) {
 873                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 874                 }
 875                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 876         }
 877
 878         protected function imageDupes() {
 879                 $this->loadFile();
 880                 $out = $this->getContext()->getOutput();
 881
 882                 $dupes = $this->mPage->getDuplicates();
 883                 if ( count( $dupes ) == 0 ) {
 884                         return;
 885                 }
 886
 887                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 888                 $out->addWikiMsg( 'duplicatesoffile',
 889                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 890                 );
 891                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 892
 893                 /**
 894                  * @var $file File
 895                  */
 896                 foreach ( $dupes as $file ) {
 897                         $fromSrc = '';
 898                         if ( $file->isLocal() ) {
 899                                 $link = Linker::linkKnown( $file->getTitle() );
 900                         } else {
 901                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 902                                         $file->getTitle()->getPrefixedText() );
 903                                 $fromSrc = wfMessage( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 904                         }
 905                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 906                 }
 907                 $out->addHTML( "</ul></div>\n" );
 908         }
 909
 910         /**
 911          * Delete the file, or an earlier version of it
 912          */
 913         public function delete() {
 914                 $file = $this->mPage->getFile();
 915                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 916                         // Standard article deletion
 917                         parent::delete();
 918                         return;
 919                 }
 920
 921                 $deleter = new FileDeleteForm( $file );
 922                 $deleter->execute();
 923         }
 924
 925         /**
 926          * Display an error with a wikitext description
 927          *
 928          * @param string $description
 929          */
 930         function showError( $description ) {
 931                 $out = $this->getContext()->getOutput();
 932                 $out->setPageTitle( wfMessage( 'internalerror' ) );
 933                 $out->setRobotPolicy( 'noindex,nofollow' );
 934                 $out->setArticleRelated( false );
 935                 $out->enableClientCache( false );
 936                 $out->addWikiText( $description );
 937         }
 938
 939         /**
 940          * Callback for usort() to do link sorts by (namespace, title)
 941          * Function copied from Title::compare()
 942          *
 943          * @param object $a Object page to compare with
 944          * @param object $b Object page to compare with
 945          * @return int Result of string comparison, or namespace comparison
 946          */
 947         protected function compare( $a, $b ) {
 948                 if ( $a->page_namespace == $b->page_namespace ) {
 949                         return strcmp( $a->page_title, $b->page_title );
 950                 } else {
 951                         return $a->page_namespace - $b->page_namespace;
 952                 }
 953         }
 954
 955         /**
 956          * Returns the corresponding $wgImageLimits entry for the selected user option
 957          *
 958          * @param User $user
 959          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 960          * @return array
 961          * @since 1.21
 962          */
 963         public function getImageLimitsFromOption( $user, $optionName ) {
 964                 global $wgImageLimits;
 965
 966                 $option = $user->getIntOption( $optionName );
 967                 if ( !isset( $wgImageLimits[$option] ) ) {
 968                         $option = User::getDefaultOption( $optionName );
 969                 }
 970
 971                 // The user offset might still be incorrect, specially if
 972                 // $wgImageLimits got changed (see bug #8858).
 973                 if ( !isset( $wgImageLimits[$option] ) ) {
 974                         // Default to the first offset in $wgImageLimits
 975                         $option = 0;
 976                 }
 977
 978                 return isset( $wgImageLimits[$option] )
 979                         ? $wgImageLimits[$option]
 980                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
 981         }
 982
 983         /**
 984          * Output a drop-down box for language options for the file
 985          *
 986          * @param array $langChoices Array of string language codes
 987          * @param string $curLang Language code file is being viewed in.
 988          * @param string $defaultLang Language code that image is rendered in by default
 989          * @return string HTML to insert underneath image.
 990          */
 991         protected function doRenderLangOpt( array $langChoices, $curLang, $defaultLang ) {
 992                 global $wgScript;
 993                 sort( $langChoices );
 994                 $curLang = wfBCP47( $curLang );
 995                 $defaultLang = wfBCP47( $defaultLang );
 996                 $opts = '';
 997                 $haveCurrentLang = false;
 998                 $haveDefaultLang = false;
 999
1000                 // We make a list of all the language choices in the file.
1001                 // Additionally if the default language to render this file
1002                 // is not included as being in this file (for example, in svgs
1003                 // usually the fallback content is the english content) also
1004                 // include a choice for that. Last of all, if we're viewing
1005                 // the file in a language not on the list, add it as a choice.
1006                 foreach ( $langChoices as $lang ) {
1007                         $code = wfBCP47( $lang );
1008                         $name = Language::fetchLanguageName( $code, $this->getContext()->getLanguage()->getCode() );
1009                         if ( $name !== '' ) {
1010                                 $display = wfMessage( 'img-lang-opt', $code, $name )->text();
1011                         } else {
1012                                 $display = $code;
1013                         }
1014                         $opts .= "\n" . Xml::option( $display, $code, $curLang === $code );
1015                         if ( $curLang === $code ) {
1016                                 $haveCurrentLang = true;
1017                         }
1018                         if ( $defaultLang === $code ) {
1019                                 $haveDefaultLang = true;
1020                         }
1021                 }
1022                 if ( !$haveDefaultLang ) {
1023                         // Its hard to know if the content is really in the default language, or
1024                         // if its just unmarked content that could be in any language.
1025                         $opts = Xml::option(
1026                                 wfMessage( 'img-lang-default' )->text(),
1027                                 $defaultLang,
1028                                 $defaultLang === $curLang
1029                         ) . $opts;
1030                 }
1031                 if ( !$haveCurrentLang && $defaultLang !== $curLang ) {
1032                         $name = Language::fetchLanguageName( $curLang, $this->getContext()->getLanguage()->getCode() );
1033                         if ( $name !== '' ) {
1034                                 $display = wfMessage( 'img-lang-opt', $curLang, $name )->text();
1035                         } else {
1036                                 $display = $curLang;
1037                         }
1038                         $opts = Xml::option( $display, $curLang, true ) . $opts;
1039                 }
1040
1041                 $select = Html::rawElement(
1042                         'select',
1043                         array( 'id' => 'mw-imglangselector', 'name' => 'lang' ),
1044                         $opts
1045                 );
1046                 $submit = Xml::submitButton( wfMessage( 'img-lang-go' )->text() );
1047
1048                 $formContents = wfMessage( 'img-lang-info' )->rawParams( $select, $submit )->parse()
1049                         . Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() );
1050
1051                 $langSelectLine = Html::rawElement( 'div', array( 'id' => 'mw-imglangselector-line' ),
1052                         Html::rawElement( 'form', array( 'action' => $wgScript ), $formContents )
1053                 );
1054                 return $langSelectLine;
1055         }
1056
1057         /**
1058          * Get the width and height to display image at.
1059          *
1060          * @note This method assumes that it is only called if one
1061          *  of the dimensions are bigger than the max, or if the
1062          *  image is vectorized.
1063          *
1064          * @param $maxWidth integer Max width to display at
1065          * @param $maxHeight integer Max height to display at
1066          * @param $width integer Actual width of the image
1067          * @param $height integer Actual height of the image
1068          * @throws MWException
1069          * @return Array (width, height)
1070          */
1071         protected function getDisplayWidthHeight( $maxWidth, $maxHeight, $width, $height ) {
1072                 if ( !$maxWidth || !$maxHeight ) {
1073                         // should never happen
1074                         throw new MWException( 'Using a choice from $wgImageLimits that is 0x0' );
1075                 }
1076
1077                 if ( !$width || !$height ) {
1078                         return array( 0, 0 );
1079                 }
1080
1081                 # Calculate the thumbnail size.
1082                 if ( $width <= $maxWidth && $height <= $maxHeight ) {
1083                         // Vectorized image, do nothing.
1084                 } elseif ( $width / $height >= $maxWidth / $maxHeight ) {
1085                         # The limiting factor is the width, not the height.
1086                         $height = round( $height * $maxWidth / $width );
1087                         $width = $maxWidth;
1088                         # Note that $height <= $maxHeight now.
1089                 } else {
1090                         $newwidth = floor( $width * $maxHeight / $height );
1091                         $height = round( $height * $newwidth / $width );
1092                         $width = $newwidth;
1093                         # Note that $height <= $maxHeight now, but might not be identical
1094                         # because of rounding.
1095                 }
1096                 return array( $width, $height );
1097         }
1098
1099         /**
1100          * Get alternative thumbnail sizes.
1101          *
1102          * @note This will only list several alternatives if thumbnails are rendered on 404
1103          * @param $origWidth Actual width of image
1104          * @param $origHeight Actual height of image
1105          * @return Array An array of [width, height] pairs.
1106          */
1107         protected function getThumbSizes( $origWidth, $origHeight ) {
1108                 global $wgImageLimits;
1109                 if ( $this->displayImg->getRepo()->canTransformVia404() ) {
1110                         $thumbSizes = $wgImageLimits;
1111                         // Also include the full sized resolution in the list, so
1112                         // that users know they can get it. This will link to the
1113                         // original file asset if mustRender() === false. In the case
1114                         // that we mustRender, some users have indicated that they would
1115                         // find it useful to have the full size image in the rendered
1116                         // image format.
1117                         $thumbSizes[] = array( $origWidth, $origHeight );
1118                 } else {
1119                         # Creating thumb links triggers thumbnail generation.
1120                         # Just generate the thumb for the current users prefs.
1121                         $thumbSizes = array( $this->getImageLimitsFromOption( $this->getContext()->getUser(), 'thumbsize' ) );
1122                         if ( !$this->displayImg->mustRender() ) {
1123                                 // We can safely include a link to the "full-size" preview,
1124                                 // without actually rendering.
1125                                 $thumbSizes[] = array( $origWidth, $origHeight );
1126                         }
1127                 }
1128                 return $thumbSizes;
1129         }
1130
1131 }
1132
1133 /**
1134  * Builds the image revision log shown on image pages
1135  *
1136  * @ingroup Media
1137  */
1138 class ImageHistoryList extends ContextSource {
1139
1140         /**
1141          * @var Title
1142          */
1143         protected $title;
1144
1145         /**
1146          * @var File
1147          */
1148         protected $img;
1149
1150         /**
1151          * @var ImagePage
1152          */
1153         protected $imagePage;
1154
1155         /**
1156          * @var File
1157          */
1158         protected $current;
1159
1160         protected $repo, $showThumb;
1161         protected $preventClickjacking = false;
1162
1163         /**
1164          * @param ImagePage $imagePage
1165          */
1166         public function __construct( $imagePage ) {
1167                 global $wgShowArchiveThumbnails;
1168                 $this->current = $imagePage->getFile();
1169                 $this->img = $imagePage->getDisplayedFile();
1170                 $this->title = $imagePage->getTitle();
1171                 $this->imagePage = $imagePage;
1172                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
1173                 $this->setContext( $imagePage->getContext() );
1174         }
1175
1176         /**
1177          * @return ImagePage
1178          */
1179         public function getImagePage() {
1180                 return $this->imagePage;
1181         }
1182
1183         /**
1184          * @return File
1185          */
1186         public function getFile() {
1187                 return $this->img;
1188         }
1189
1190         /**
1191          * @param string $navLinks
1192          * @return string
1193          */
1194         public function beginImageHistoryList( $navLinks = '' ) {
1195                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() )
1196                         . "\n"
1197                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1198                         . $this->msg( 'filehist-help' )->parseAsBlock()
1199                         . $navLinks . "\n"
1200                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1201                         . '<tr><td></td>'
1202                         . ( $this->current->isLocal()
1203                                 && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
1204                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1205                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1206                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1207                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1208                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1209                         . "</tr>\n";
1210         }
1211
1212         /**
1213          * @param string $navLinks
1214          * @return string
1215          */
1216         public function endImageHistoryList( $navLinks = '' ) {
1217                 return "</table>\n$navLinks\n</div>\n";
1218         }
1219
1220         /**
1221          * @param bool $iscur
1222          * @param File $file
1223          * @return string
1224          */
1225         public function imageHistoryLine( $iscur, $file ) {
1226                 global $wgContLang;
1227
1228                 $user = $this->getUser();
1229                 $lang = $this->getLanguage();
1230                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1231                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1232                 $userId = $file->getUser( 'id' );
1233                 $userText = $file->getUser( 'text' );
1234                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1235
1236                 $local = $this->current->isLocal();
1237                 $row = $selected = '';
1238
1239                 // Deletion link
1240                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1241                         $row .= '<td>';
1242                         # Link to remove from history
1243                         if ( $user->isAllowed( 'delete' ) ) {
1244                                 $q = array( 'action' => 'delete' );
1245                                 if ( !$iscur ) {
1246                                         $q['oldimage'] = $img;
1247                                 }
1248                                 $row .= Linker::linkKnown(
1249                                         $this->title,
1250                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1251                                         array(), $q
1252                                 );
1253                         }
1254                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1255                         $canHide = $user->isAllowed( 'deleterevision' );
1256                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1257                                 if ( $user->isAllowed( 'delete' ) ) {
1258                                         $row .= '<br />';
1259                                 }
1260                                 // If file is top revision or locked from this user, don't link
1261                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1262                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1263                                 } else {
1264                                         list( $ts, ) = explode( '!', $img, 2 );
1265                                         $query = array(
1266                                                 'type' => 'oldimage',
1267                                                 'target' => $this->title->getPrefixedText(),
1268                                                 'ids' => $ts,
1269                                         );
1270                                         $del = Linker::revDeleteLink( $query,
1271                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1272                                 }
1273                                 $row .= $del;
1274                         }
1275                         $row .= '</td>';
1276                 }
1277
1278                 // Reversion link/current indicator
1279                 $row .= '<td>';
1280                 if ( $iscur ) {
1281                         $row .= $this->msg( 'filehist-current' )->escaped();
1282                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1283                         && $this->title->quickUserCan( 'upload', $user )
1284                 ) {
1285                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1286                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1287                         } else {
1288                                 $row .= Linker::linkKnown(
1289                                         $this->title,
1290                                         $this->msg( 'filehist-revert' )->escaped(),
1291                                         array(),
1292                                         array(
1293                                                 'action' => 'revert',
1294                                                 'oldimage' => $img,
1295                                                 'wpEditToken' => $user->getEditToken( $img )
1296                                         )
1297                                 );
1298                         }
1299                 }
1300                 $row .= '</td>';
1301
1302                 // Date/time and image link
1303                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1304                         $selected = "class='filehistory-selected'";
1305                 }
1306                 $row .= "<td $selected style='white-space: nowrap;'>";
1307                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1308                         # Don't link to unviewable files
1309                         $row .= '<span class="history-deleted">'
1310                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1311                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1312                         if ( $local ) {
1313                                 $this->preventClickjacking();
1314                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1315                                 # Make a link to review the image
1316                                 $url = Linker::linkKnown(
1317                                         $revdel,
1318                                         $lang->userTimeAndDate( $timestamp, $user ),
1319                                         array(),
1320                                         array(
1321                                                 'target' => $this->title->getPrefixedText(),
1322                                                 'file' => $img,
1323                                                 'token' => $user->getEditToken( $img )
1324                                         )
1325                                 );
1326                         } else {
1327                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1328                         }
1329                         $row .= '<span class="history-deleted">' . $url . '</span>';
1330                 } else {
1331                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1332                         $row .= Xml::element(
1333                                 'a',
1334                                 array( 'href' => $url ),
1335                                 $lang->userTimeAndDate( $timestamp, $user )
1336                         );
1337                 }
1338                 $row .= "</td>";
1339
1340                 // Thumbnail
1341                 if ( $this->showThumb ) {
1342                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1343                 }
1344
1345                 // Image dimensions + size
1346                 $row .= '<td>';
1347                 $row .= htmlspecialchars( $file->getDimensionsString() );
1348                 $row .= $this->msg( 'word-separator' )->escaped();
1349                 $row .= '<span style="white-space: nowrap;">';
1350                 $row .= $this->msg( 'parentheses' )->sizeParams( $file->getSize() )->escaped();
1351                 $row .= '</span>';
1352                 $row .= '</td>';
1353
1354                 // Uploading user
1355                 $row .= '<td>';
1356                 // Hide deleted usernames
1357                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1358                         $row .= '<span class="history-deleted">'
1359                                 . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1360                 } else {
1361                         if ( $local ) {
1362                                 $row .= Linker::userLink( $userId, $userText );
1363                                 $row .= $this->msg( 'word-separator' )->escaped();
1364                                 $row .= '<span style="white-space: nowrap;">';
1365                                 $row .= Linker::userToolLinks( $userId, $userText );
1366                                 $row .= '</span>';
1367                         } else {
1368                                 $row .= htmlspecialchars( $userText );
1369                         }
1370                 }
1371                 $row .= '</td>';
1372
1373                 // Don't show deleted descriptions
1374                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1375                         $row .= '<td><span class="history-deleted">' .
1376                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1377                 } else {
1378                         $row .= '<td dir="' . $wgContLang->getDir() . '">' .
1379                                 Linker::formatComment( $description, $this->title ) . '</td>';
1380                 }
1381
1382                 $rowClass = null;
1383                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1384                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1385
1386                 return "<tr{$classAttr}>{$row}</tr>\n";
1387         }
1388
1389         /**
1390          * @param File $file
1391          * @return string
1392          */
1393         protected function getThumbForLine( $file ) {
1394                 $lang = $this->getLanguage();
1395                 $user = $this->getUser();
1396                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1397                         && !$file->isDeleted( File::DELETED_FILE )
1398                 ) {
1399                         $params = array(
1400                                 'width' => '120',
1401                                 'height' => '120',
1402                         );
1403                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1404
1405                         $thumbnail = $file->transform( $params );
1406                         $options = array(
1407                                 'alt' => $this->msg( 'filehist-thumbtext',
1408                                         $lang->userTimeAndDate( $timestamp, $user ),
1409                                         $lang->userDate( $timestamp, $user ),
1410                                         $lang->userTime( $timestamp, $user ) )->text(),
1411                                 'file-link' => true,
1412                         );
1413
1414                         if ( !$thumbnail ) {
1415                                 return $this->msg( 'filehist-nothumb' )->escaped();
1416                         }
1417
1418                         return $thumbnail->toHtml( $options );
1419                 } else {
1420                         return $this->msg( 'filehist-nothumb' )->escaped();
1421                 }
1422         }
1423
1424         /**
1425          * @param bool $enable
1426          */
1427         protected function preventClickjacking( $enable = true ) {
1428                 $this->preventClickjacking = $enable;
1429         }
1430
1431         /**
1432          * @return bool
1433          */
1434         public function getPreventClickjacking() {
1435                 return $this->preventClickjacking;
1436         }
1437 }
1438
1439 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1440         protected $preventClickjacking = false;
1441
1442         /**
1443          * @var File
1444          */
1445         protected $mImg;
1446
1447         /**
1448          * @var Title
1449          */
1450         protected $mTitle;
1451
1452         /**
1453          * @param ImagePage $imagePage
1454          */
1455         function __construct( $imagePage ) {
1456                 parent::__construct( $imagePage->getContext() );
1457                 $this->mImagePage = $imagePage;
1458                 $this->mTitle = clone ( $imagePage->getTitle() );
1459                 $this->mTitle->setFragment( '#filehistory' );
1460                 $this->mImg = null;
1461                 $this->mHist = array();
1462                 $this->mRange = array( 0, 0 ); // display range
1463         }
1464
1465         /**
1466          * @return Title
1467          */
1468         function getTitle() {
1469                 return $this->mTitle;
1470         }
1471
1472         function getQueryInfo() {
1473                 return false;
1474         }
1475
1476         /**
1477          * @return string
1478          */
1479         function getIndexField() {
1480                 return '';
1481         }
1482
1483         /**
1484          * @param object $row
1485          * @return string
1486          */
1487         function formatRow( $row ) {
1488                 return '';
1489         }
1490
1491         /**
1492          * @return string
1493          */
1494         function getBody() {
1495                 $s = '';
1496                 $this->doQuery();
1497                 if ( count( $this->mHist ) ) {
1498                         $list = new ImageHistoryList( $this->mImagePage );
1499                         # Generate prev/next links
1500                         $navLink = $this->getNavigationBar();
1501                         $s = $list->beginImageHistoryList( $navLink );
1502                         // Skip rows there just for paging links
1503                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1504                                 $file = $this->mHist[$i];
1505                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1506                         }
1507                         $s .= $list->endImageHistoryList( $navLink );
1508
1509                         if ( $list->getPreventClickjacking() ) {
1510                                 $this->preventClickjacking();
1511                         }
1512                 }
1513                 return $s;
1514         }
1515
1516         function doQuery() {
1517                 if ( $this->mQueryDone ) {
1518                         return;
1519                 }
1520                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1521                 if ( !$this->mImg->exists() ) {
1522                         return;
1523                 }
1524                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1525                 if ( $this->mIsBackwards ) {
1526                         // Fetch the file history
1527                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1528                         // The current rev may not meet the offset/limit
1529                         $numRows = count( $this->mHist );
1530                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1531                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1532                         }
1533                 } else {
1534                         // The current rev may not meet the offset
1535                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1536                                 $this->mHist[] = $this->mImg;
1537                         }
1538                         // Old image versions (fetch extra row for nav links)
1539                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1540                         // Fetch the file history
1541                         $this->mHist = array_merge( $this->mHist,
1542                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1543                 }
1544                 $numRows = count( $this->mHist ); // Total number of query results
1545                 if ( $numRows ) {
1546                         # Index value of top item in the list
1547                         $firstIndex = $this->mIsBackwards ?
1548                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1549                         # Discard the extra result row if there is one
1550                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1551                                 if ( $this->mIsBackwards ) {
1552                                         # Index value of item past the index
1553                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1554                                         # Index value of bottom item in the list
1555                                         $lastIndex = $this->mHist[1]->getTimestamp();
1556                                         # Display range
1557                                         $this->mRange = array( 1, $numRows - 1 );
1558                                 } else {
1559                                         # Index value of item past the index
1560                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1561                                         # Index value of bottom item in the list
1562                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1563                                         # Display range
1564                                         $this->mRange = array( 0, $numRows - 2 );
1565                                 }
1566                         } else {
1567                                 # Setting indexes to an empty string means that they will be
1568                                 # omitted if they would otherwise appear in URLs. It just so
1569                                 # happens that this  is the right thing to do in the standard
1570                                 # UI, in all the relevant cases.
1571                                 $this->mPastTheEndIndex = '';
1572                                 # Index value of bottom item in the list
1573                                 $lastIndex = $this->mIsBackwards ?
1574                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1575                                 # Display range
1576                                 $this->mRange = array( 0, $numRows - 1 );
1577                         }
1578                 } else {
1579                         $firstIndex = '';
1580                         $lastIndex = '';
1581                         $this->mPastTheEndIndex = '';
1582                 }
1583                 if ( $this->mIsBackwards ) {
1584                         $this->mIsFirst = ( $numRows < $queryLimit );
1585                         $this->mIsLast = ( $this->mOffset == '' );
1586                         $this->mLastShown = $firstIndex;
1587                         $this->mFirstShown = $lastIndex;
1588                 } else {
1589                         $this->mIsFirst = ( $this->mOffset == '' );
1590                         $this->mIsLast = ( $numRows < $queryLimit );
1591                         $this->mLastShown = $lastIndex;
1592                         $this->mFirstShown = $firstIndex;
1593                 }
1594                 $this->mQueryDone = true;
1595         }
1596
1597         /**
1598          * @param bool $enable
1599          */
1600         protected function preventClickjacking( $enable = true ) {
1601                 $this->preventClickjacking = $enable;
1602         }
1603
1604         /**
1605          * @return bool
1606          */
1607         public function getPreventClickjacking() {
1608                 return $this->preventClickjacking;
1609         }
1610
1611 }