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">' .
 252                                 $this->getContext()->msg( 'metadata' )->escaped() .
 253                                 '</a></li>';
 254                 }
 255
 256                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 257         }
 258
 259         /**
 260          * Make a table with metadata to be shown in the output page.
 261          *
 262          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 263          *
 264          * @param array $metadata The array containing the Exif data
 265          * @return string The metadata table. This is treated as Wikitext (!)
 266          */
 267         protected function makeMetadataTable( $metadata ) {
 268                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 269                 $r .= $this->getContext()->msg( 'metadata-help' )->plain();
 270                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 271                 foreach ( $metadata as $type => $stuff ) {
 272                         foreach ( $stuff as $v ) {
 273                                 # @todo FIXME: Why is this using escapeId for a class?!
 274                                 $class = Sanitizer::escapeId( $v['id'] );
 275                                 if ( $type == 'collapsed' ) {
 276                                         // Handled by mediawiki.action.view.metadata module.
 277                                         $class .= ' collapsable';
 278                                 }
 279                                 $r .= "<tr class=\"$class\">\n";
 280                                 $r .= "<th>{$v['name']}</th>\n";
 281                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 282                         }
 283                 }
 284                 $r .= "</table>\n</div>\n";
 285                 return $r;
 286         }
 287
 288         /**
 289          * Overloading Article's getContentObject method.
 290          *
 291          * Omit noarticletext if sharedupload; text will be fetched from the
 292          * shared upload server if possible.
 293          * @return string
 294          */
 295         public function getContentObject() {
 296                 $this->loadFile();
 297                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 298                         return null;
 299                 }
 300                 return parent::getContentObject();
 301         }
 302
 303         protected function openShowImage() {
 304                 global $wgEnableUploads, $wgSend404Code, $wgSVGMaxSize;
 305
 306                 $this->loadFile();
 307                 $out = $this->getContext()->getOutput();
 308                 $user = $this->getContext()->getUser();
 309                 $lang = $this->getContext()->getLanguage();
 310                 $dirmark = $lang->getDirMarkEntity();
 311                 $request = $this->getContext()->getRequest();
 312
 313                 $max = $this->getImageLimitsFromOption( $user, 'imagesize' );
 314                 $maxWidth = $max[0];
 315                 $maxHeight = $max[1];
 316
 317                 if ( $this->displayImg->exists() ) {
 318                         # image
 319                         $page = $request->getIntOrNull( 'page' );
 320                         if ( is_null( $page ) ) {
 321                                 $params = array();
 322                                 $page = 1;
 323                         } else {
 324                                 $params = array( 'page' => $page );
 325                         }
 326
 327                         $renderLang = $request->getVal( 'lang' );
 328                         if ( !is_null( $renderLang ) ) {
 329                                 $handler = $this->displayImg->getHandler();
 330                                 if ( $handler && $handler->validateParam( 'lang', $renderLang ) ) {
 331                                         $params['lang'] = $renderLang;
 332                                 } else {
 333                                         $renderLang = null;
 334                                 }
 335                         }
 336
 337                         $width_orig = $this->displayImg->getWidth( $page );
 338                         $width = $width_orig;
 339                         $height_orig = $this->displayImg->getHeight( $page );
 340                         $height = $height_orig;
 341
 342                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 343                         $linktext = $filename;
 344
 345                         Hooks::run( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 346
 347                         if ( $this->displayImg->allowInlineDisplay() ) {
 348                                 # image
 349                                 # "Download high res version" link below the image
 350                                 # $msgsize = $this->getContext()->msg( 'file-info-size', $width_orig, $height_orig,
 351                                 #   Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 352                                 # We'll show a thumbnail of this image
 353                                 if ( $width > $maxWidth || $height > $maxHeight || $this->displayImg->isVectorized() ) {
 354                                         list( $width, $height ) = $this->getDisplayWidthHeight(
 355                                                 $maxWidth, $maxHeight, $width, $height
 356                                         );
 357                                         $linktext = $this->getContext()->msg( 'show-big-image' )->escaped();
 358
 359                                         $thumbSizes = $this->getThumbSizes( $width_orig, $height_orig );
 360                                         # Generate thumbnails or thumbnail links as needed...
 361                                         $otherSizes = array();
 362                                         foreach ( $thumbSizes as $size ) {
 363                                                 // We include a thumbnail size in the list, if it is
 364                                                 // less than or equal to the original size of the image
 365                                                 // asset ($width_orig/$height_orig). We also exclude
 366                                                 // the current thumbnail's size ($width/$height)
 367                                                 // since that is added to the message separately, so
 368                                                 // it can be denoted as the current size being shown.
 369                                                 // Vectorized images are limited by $wgSVGMaxSize big,
 370                                                 // so all thumbs less than or equal that are shown.
 371                                                 if ( ( ( $size[0] <= $width_orig && $size[1] <= $height_orig )
 372                                                                 || ( $this->displayImg->isVectorized()
 373                                                                         && max( $size[0], $size[1] ) <= $wgSVGMaxSize )
 374                                                         )
 375                                                         && $size[0] != $width && $size[1] != $height
 376                                                 ) {
 377                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 378                                                         if ( $sizeLink ) {
 379                                                                 $otherSizes[] = $sizeLink;
 380                                                         }
 381                                                 }
 382                                         }
 383                                         $otherSizes = array_unique( $otherSizes );
 384
 385                                         $msgsmall = '';
 386                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 387                                         if ( $sizeLinkBigImagePreview ) {
 388                                                 $msgsmall .= $this->getContext()->msg( 'show-big-image-preview' )->
 389                                                         rawParams( $sizeLinkBigImagePreview )->
 390                                                         parse();
 391                                         }
 392                                         if ( count( $otherSizes ) ) {
 393                                                 $msgsmall .= ' ' .
 394                                                 Html::rawElement(
 395                                                         'span',
 396                                                         array( 'class' => 'mw-filepage-other-resolutions' ),
 397                                                         $this->getContext()->msg( 'show-big-image-other' )
 398                                                                 ->rawParams( $lang->pipeList( $otherSizes ) )
 399                                                                 ->params( count( $otherSizes ) )
 400                                                                 ->parse()
 401                                                 );
 402                                         }
 403                                 } elseif ( $width == 0 && $height == 0 ) {
 404                                         # Some sort of audio file that doesn't have dimensions
 405                                         # Don't output a no hi res message for such a file
 406                                         $msgsmall = '';
 407                                 } else {
 408                                         # Image is small enough to show full size on image page
 409                                         $msgsmall = $this->getContext()->msg( 'file-nohires' )->parse();
 410                                 }
 411
 412                                 $params['width'] = $width;
 413                                 $params['height'] = $height;
 414                                 $thumbnail = $this->displayImg->transform( $params );
 415                                 Linker::processResponsiveImages( $this->displayImg, $thumbnail, $params );
 416
 417                                 $anchorclose = Html::rawElement(
 418                                         'div',
 419                                         array( 'class' => 'mw-filepage-resolutioninfo' ),
 420                                         $msgsmall
 421                                 );
 422
 423                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 424                                 if ( $isMulti ) {
 425                                         $out->addModules( 'mediawiki.page.image.pagination' );
 426                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 427                                 }
 428
 429                                 if ( $thumbnail ) {
 430                                         $options = array(
 431                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 432                                                 'file-link' => true,
 433                                         );
 434                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 435                                                 $thumbnail->toHtml( $options ) .
 436                                                 $anchorclose . "</div>\n" );
 437                                 }
 438
 439                                 if ( $isMulti ) {
 440                                         $count = $this->displayImg->pageCount();
 441
 442                                         if ( $page > 1 ) {
 443                                                 $label = $out->parse( $this->getContext()->msg( 'imgmultipageprev' )->text(), false );
 444                                                 // on the client side, this link is generated in ajaxifyPageNavigation()
 445                                                 // in the mediawiki.page.image.pagination module
 446                                                 $link = Linker::linkKnown(
 447                                                         $this->getTitle(),
 448                                                         $label,
 449                                                         array(),
 450                                                         array( 'page' => $page - 1 )
 451                                                 );
 452                                                 $thumb1 = Linker::makeThumbLinkObj(
 453                                                         $this->getTitle(),
 454                                                         $this->displayImg,
 455                                                         $link,
 456                                                         $label,
 457                                                         'none',
 458                                                         array( 'page' => $page - 1 )
 459                                                 );
 460                                         } else {
 461                                                 $thumb1 = '';
 462                                         }
 463
 464                                         if ( $page < $count ) {
 465                                                 $label = $this->getContext()->msg( 'imgmultipagenext' )->text();
 466                                                 $link = Linker::linkKnown(
 467                                                         $this->getTitle(),
 468                                                         $label,
 469                                                         array(),
 470                                                         array( 'page' => $page + 1 )
 471                                                 );
 472                                                 $thumb2 = Linker::makeThumbLinkObj(
 473                                                         $this->getTitle(),
 474                                                         $this->displayImg,
 475                                                         $link,
 476                                                         $label,
 477                                                         'none',
 478                                                         array( 'page' => $page + 1 )
 479                                                 );
 480                                         } else {
 481                                                 $thumb2 = '';
 482                                         }
 483
 484                                         global $wgScript;
 485
 486                                         $formParams = array(
 487                                                 'name' => 'pageselector',
 488                                                 'action' => $wgScript,
 489                                         );
 490                                         $options = array();
 491                                         for ( $i = 1; $i <= $count; $i++ ) {
 492                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 493                                         }
 494                                         $select = Xml::tags( 'select',
 495                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 496                                                 implode( "\n", $options ) );
 497
 498                                         $out->addHTML(
 499                                                 '</td><td><div class="multipageimagenavbox">' .
 500                                                 Xml::openElement( 'form', $formParams ) .
 501                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 502                                                 $this->getContext()->msg( 'imgmultigoto' )->rawParams( $select )->parse() .
 503                                                 Xml::submitButton( $this->getContext()->msg( 'imgmultigo' )->text() ) .
 504                                                 Xml::closeElement( 'form' ) .
 505                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 506                                         );
 507                                 }
 508                         } elseif ( $this->displayImg->isSafeFile() ) {
 509                                 # if direct link is allowed but it's not a renderable image, show an icon.
 510                                 $icon = $this->displayImg->iconThumb();
 511
 512                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 513                                         $icon->toHtml( array( 'file-link' => true ) ) .
 514                                         "</div>\n" );
 515                         }
 516
 517                         $longDesc = $this->getContext()->msg( 'parentheses', $this->displayImg->getLongDesc() )->text();
 518
 519                         $handler = $this->displayImg->getHandler();
 520
 521                         // If this is a filetype with potential issues, warn the user.
 522                         if ( $handler ) {
 523                                 $warningConfig = $handler->getWarningConfig( $this->displayImg );
 524
 525                                 if ( $warningConfig !== null ) {
 526                                         // The warning will be displayed via CSS and JavaScript.
 527                                         // We just need to tell the client side what message to use.
 528                                         $output = $this->getContext()->getOutput();
 529                                         $output->addJsConfigVars( 'wgFileWarning', $warningConfig );
 530                                         $output->addModules( $warningConfig['module'] );
 531                                         $output->addModules( 'mediawiki.filewarning' );
 532                                 }
 533                         }
 534
 535                         $medialink = "[[Media:$filename|$linktext]]";
 536
 537                         if ( !$this->displayImg->isSafeFile() ) {
 538                                 $warning = $this->getContext()->msg( 'mediawarning' )->plain();
 539                                 // dirmark is needed here to separate the file name, which
 540                                 // most likely ends in Latin characters, from the description,
 541                                 // which may begin with the file type. In RTL environment
 542                                 // this will get messy.
 543                                 // The dirmark, however, must not be immediately adjacent
 544                                 // to the filename, because it can get copied with it.
 545                                 // See bug 25277.
 546                                 // @codingStandardsIgnoreStart Ignore long line
 547                                 $out->addWikiText( <<<EOT
 548 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 549 <div class="mediaWarning">$warning</div>
 550 EOT
 551                                 );
 552                                 // @codingStandardsIgnoreEnd
 553                         } else {
 554                                 $out->addWikiText( <<<EOT
 555 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 556 </div>
 557 EOT
 558                                 );
 559                         }
 560
 561                         $renderLangOptions = $this->displayImg->getAvailableLanguages();
 562                         if ( count( $renderLangOptions ) >= 1 ) {
 563                                 $currentLanguage = $renderLang;
 564                                 $defaultLang = $this->displayImg->getDefaultRenderLanguage();
 565                                 if ( is_null( $currentLanguage ) ) {
 566                                         $currentLanguage = $defaultLang;
 567                                 }
 568                                 $out->addHtml( $this->doRenderLangOpt( $renderLangOptions, $currentLanguage, $defaultLang ) );
 569                         }
 570
 571                         // Add cannot animate thumbnail warning
 572                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 573                                 // Include the extension so wiki admins can
 574                                 // customize it on a per file-type basis
 575                                 // (aka say things like use format X instead).
 576                                 // additionally have a specific message for
 577                                 // file-no-thumb-animation-gif
 578                                 $ext = $this->displayImg->getExtension();
 579                                 $noAnimMesg = wfMessageFallback(
 580                                         'file-no-thumb-animation-' . $ext,
 581                                         'file-no-thumb-animation'
 582                                 )->plain();
 583
 584                                 $out->addWikiText( <<<EOT
 585 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 586 EOT
 587                                 );
 588                         }
 589
 590                         if ( !$this->displayImg->isLocal() ) {
 591                                 $this->printSharedImageText();
 592                         }
 593                 } else {
 594                         # Image does not exist
 595                         if ( !$this->getID() ) {
 596                                 # No article exists either
 597                                 # Show deletion log to be consistent with normal articles
 598                                 LogEventsList::showLogExtract(
 599                                         $out,
 600                                         array( 'delete', 'move' ),
 601                                         $this->getTitle()->getPrefixedText(),
 602                                         '',
 603                                         array( 'lim' => 10,
 604                                                 'conds' => array( "log_action != 'revision'" ),
 605                                                 'showIfEmpty' => false,
 606                                                 'msgKey' => array( 'moveddeleted-notice' )
 607                                         )
 608                                 );
 609                         }
 610
 611                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 612                                 // Only show an upload link if the user can upload
 613                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 614                                 $nofile = array(
 615                                         'filepage-nofile-link',
 616                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 617                                 );
 618                         } else {
 619                                 $nofile = 'filepage-nofile';
 620                         }
 621                         // Note, if there is an image description page, but
 622                         // no image, then this setRobotPolicy is overridden
 623                         // by Article::View().
 624                         $out->setRobotPolicy( 'noindex,nofollow' );
 625                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 626                         if ( !$this->getID() && $wgSend404Code ) {
 627                                 // If there is no image, no shared image, and no description page,
 628                                 // output a 404, to be consistent with Article::showMissingArticle.
 629                                 $request->response()->statusHeader( 404 );
 630                         }
 631                 }
 632                 $out->setFileVersion( $this->displayImg );
 633         }
 634
 635         /**
 636          * Creates an thumbnail of specified size and returns an HTML link to it
 637          * @param array $params Scaler parameters
 638          * @param int $width
 639          * @param int $height
 640          * @return string
 641          */
 642         private function makeSizeLink( $params, $width, $height ) {
 643                 $params['width'] = $width;
 644                 $params['height'] = $height;
 645                 $thumbnail = $this->displayImg->transform( $params );
 646                 if ( $thumbnail && !$thumbnail->isError() ) {
 647                         return Html::rawElement( 'a', array(
 648                                 'href' => $thumbnail->getUrl(),
 649                                 'class' => 'mw-thumbnail-link'
 650                                 ), $this->getContext()->msg( 'show-big-image-size' )->numParams(
 651                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 652                                 )->parse() );
 653                 } else {
 654                         return '';
 655                 }
 656         }
 657
 658         /**
 659          * Show a notice that the file is from a shared repository
 660          */
 661         protected function printSharedImageText() {
 662                 $out = $this->getContext()->getOutput();
 663                 $this->loadFile();
 664
 665                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 666                 $descText = $this->mPage->getFile()->getDescriptionText( $this->getContext()->getLanguage() );
 667
 668                 /* Add canonical to head if there is no local page for this shared file */
 669                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 670                         $out->setCanonicalUrl( $descUrl );
 671                 }
 672
 673                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 674                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 675
 676                 if ( $descUrl &&
 677                         $descText &&
 678                         $this->getContext()->msg( 'sharedupload-desc-here' )->plain() !== '-'
 679                 ) {
 680                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 681                 } elseif ( $descUrl &&
 682                         $this->getContext()->msg( 'sharedupload-desc-there' )->plain() !== '-'
 683                 ) {
 684                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 685                 } else {
 686                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 687                 }
 688
 689                 if ( $descText ) {
 690                         $this->mExtraDescription = $descText;
 691                 }
 692         }
 693
 694         public function getUploadUrl() {
 695                 $this->loadFile();
 696                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 697                 return $uploadTitle->getFullURL( array(
 698                         'wpDestFile' => $this->mPage->getFile()->getName(),
 699                         'wpForReUpload' => 1
 700                 ) );
 701         }
 702
 703         /**
 704          * Print out the various links at the bottom of the image page, e.g. reupload,
 705          * external editing (and instructions link) etc.
 706          */
 707         protected function uploadLinksBox() {
 708                 global $wgEnableUploads;
 709
 710                 if ( !$wgEnableUploads ) {
 711                         return;
 712                 }
 713
 714                 $this->loadFile();
 715                 if ( !$this->mPage->getFile()->isLocal() ) {
 716                         return;
 717                 }
 718
 719                 $out = $this->getContext()->getOutput();
 720                 $out->addHTML( "<ul>\n" );
 721
 722                 # "Upload a new version of this file" link
 723                 $canUpload = $this->getTitle()->quickUserCan( 'upload', $this->getContext()->getUser() );
 724                 if ( $canUpload && UploadBase::userCanReUpload(
 725                                 $this->getContext()->getUser(),
 726                                 $this->mPage->getFile() )
 727                 ) {
 728                         $ulink = Linker::makeExternalLink(
 729                                 $this->getUploadUrl(),
 730                                 $this->getContext()->msg( 'uploadnewversion-linktext' )->text()
 731                         );
 732                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\">"
 733                                 . "<div class=\"plainlinks\">{$ulink}</div></li>\n" );
 734                 } else {
 735                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">"
 736                                 . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 737                 }
 738
 739                 $out->addHTML( "</ul>\n" );
 740         }
 741
 742         /**
 743          * For overloading
 744          */
 745         protected function closeShowImage() {
 746         }
 747
 748         /**
 749          * If the page we've just displayed is in the "Image" namespace,
 750          * we follow it with an upload history of the image and its usage.
 751          */
 752         protected function imageHistory() {
 753                 $this->loadFile();
 754                 $out = $this->getContext()->getOutput();
 755                 $pager = new ImageHistoryPseudoPager( $this );
 756                 $out->addHTML( $pager->getBody() );
 757                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 758
 759                 $this->mPage->getFile()->resetHistory(); // free db resources
 760
 761                 # Exist check because we don't want to show this on pages where an image
 762                 # doesn't exist along with the noimage message, that would suck. -ævar
 763                 if ( $this->mPage->getFile()->exists() ) {
 764                         $this->uploadLinksBox();
 765                 }
 766         }
 767
 768         /**
 769          * @param string $target
 770          * @param int $limit
 771          * @return ResultWrapper
 772          */
 773         protected function queryImageLinks( $target, $limit ) {
 774                 $dbr = wfGetDB( DB_SLAVE );
 775
 776                 return $dbr->select(
 777                         array( 'imagelinks', 'page' ),
 778                         array( 'page_namespace', 'page_title', 'il_to' ),
 779                         array( 'il_to' => $target, 'il_from = page_id' ),
 780                         __METHOD__,
 781                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 782                 );
 783         }
 784
 785         protected function imageLinks() {
 786                 $limit = 100;
 787
 788                 $out = $this->getContext()->getOutput();
 789
 790                 $rows = array();
 791                 $redirects = array();
 792                 foreach ( $this->getTitle()->getRedirectsHere( NS_FILE ) as $redir ) {
 793                         $redirects[$redir->getDBkey()] = array();
 794                         $rows[] = (object)array(
 795                                 'page_namespace' => NS_FILE,
 796                                 'page_title' => $redir->getDBkey(),
 797                         );
 798                 }
 799
 800                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 801                 foreach ( $res as $row ) {
 802                         $rows[] = $row;
 803                 }
 804                 $count = count( $rows );
 805
 806                 $hasMore = $count > $limit;
 807                 if ( !$hasMore && count( $redirects ) ) {
 808                         $res = $this->queryImageLinks( array_keys( $redirects ),
 809                                 $limit - count( $rows ) + 1 );
 810                         foreach ( $res as $row ) {
 811                                 $redirects[$row->il_to][] = $row;
 812                                 $count++;
 813                         }
 814                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 815                 }
 816
 817                 if ( $count == 0 ) {
 818                         $out->wrapWikiMsg(
 819                                 Html::rawElement( 'div',
 820                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 821                                 'nolinkstoimage'
 822                         );
 823                         return;
 824                 }
 825
 826                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 827                 if ( !$hasMore ) {
 828                         $out->addWikiMsg( 'linkstoimage', $count );
 829                 } else {
 830                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 831                         $out->addWikiMsg( 'linkstoimage-more',
 832                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 833                                 $this->getTitle()->getPrefixedDBkey()
 834                         );
 835                 }
 836
 837                 $out->addHTML(
 838                         Html::openElement( 'ul',
 839                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 840                 );
 841                 $count = 0;
 842
 843                 // Sort the list by namespace:title
 844                 usort( $rows, array( $this, 'compare' ) );
 845
 846                 // Create links for every element
 847                 $currentCount = 0;
 848                 foreach ( $rows as $element ) {
 849                         $currentCount++;
 850                         if ( $currentCount > $limit ) {
 851                                 break;
 852                         }
 853
 854                         $query = array();
 855                         # Add a redirect=no to make redirect pages reachable
 856                         if ( isset( $redirects[$element->page_title] ) ) {
 857                                 $query['redirect'] = 'no';
 858                         }
 859                         $link = Linker::linkKnown(
 860                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 861                                 null, array(), $query
 862                         );
 863                         if ( !isset( $redirects[$element->page_title] ) ) {
 864                                 # No redirects
 865                                 $liContents = $link;
 866                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 867                                 # Redirect without usages
 868                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )
 869                                         ->rawParams( $link, '' )
 870                                         ->parse();
 871                         } else {
 872                                 # Redirect with usages
 873                                 $li = '';
 874                                 foreach ( $redirects[$element->page_title] as $row ) {
 875                                         $currentCount++;
 876                                         if ( $currentCount > $limit ) {
 877                                                 break;
 878                                         }
 879
 880                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 881                                         $li .= Html::rawElement(
 882                                                 'li',
 883                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 884                                                 $link2
 885                                                 ) . "\n";
 886                                 }
 887
 888                                 $ul = Html::rawElement(
 889                                         'ul',
 890                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 891                                         $li
 892                                         ) . "\n";
 893                                 $liContents = $this->getContext()->msg( 'linkstoimage-redirect' )->rawParams(
 894                                         $link, $ul )->parse();
 895                         }
 896                         $out->addHTML( Html::rawElement(
 897                                         'li',
 898                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 899                                         $liContents
 900                                 ) . "\n"
 901                         );
 902
 903                 };
 904                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 905                 $res->free();
 906
 907                 // Add a links to [[Special:Whatlinkshere]]
 908                 if ( $count > $limit ) {
 909                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 910                 }
 911                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 912         }
 913
 914         protected function imageDupes() {
 915                 $this->loadFile();
 916                 $out = $this->getContext()->getOutput();
 917
 918                 $dupes = $this->mPage->getDuplicates();
 919                 if ( count( $dupes ) == 0 ) {
 920                         return;
 921                 }
 922
 923                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 924                 $out->addWikiMsg( 'duplicatesoffile',
 925                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 926                 );
 927                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 928
 929                 /**
 930                  * @var $file File
 931                  */
 932                 foreach ( $dupes as $file ) {
 933                         $fromSrc = '';
 934                         if ( $file->isLocal() ) {
 935                                 $link = Linker::linkKnown( $file->getTitle() );
 936                         } else {
 937                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 938                                         $file->getTitle()->getPrefixedText() );
 939                                 $fromSrc = $this->getContext()->msg(
 940                                         'shared-repo-from',
 941                                         $file->getRepo()->getDisplayName()
 942                                 )->text();
 943                         }
 944                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 945                 }
 946                 $out->addHTML( "</ul></div>\n" );
 947         }
 948
 949         /**
 950          * Delete the file, or an earlier version of it
 951          */
 952         public function delete() {
 953                 $file = $this->mPage->getFile();
 954                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 955                         // Standard article deletion
 956                         parent::delete();
 957                         return;
 958                 }
 959
 960                 $deleter = new FileDeleteForm( $file );
 961                 $deleter->execute();
 962         }
 963
 964         /**
 965          * Display an error with a wikitext description
 966          *
 967          * @param string $description
 968          */
 969         function showError( $description ) {
 970                 $out = $this->getContext()->getOutput();
 971                 $out->setPageTitle( $this->getContext()->msg( 'internalerror' ) );
 972                 $out->setRobotPolicy( 'noindex,nofollow' );
 973                 $out->setArticleRelated( false );
 974                 $out->enableClientCache( false );
 975                 $out->addWikiText( $description );
 976         }
 977
 978         /**
 979          * Callback for usort() to do link sorts by (namespace, title)
 980          * Function copied from Title::compare()
 981          *
 982          * @param object $a Object page to compare with
 983          * @param object $b Object page to compare with
 984          * @return int Result of string comparison, or namespace comparison
 985          */
 986         protected function compare( $a, $b ) {
 987                 if ( $a->page_namespace == $b->page_namespace ) {
 988                         return strcmp( $a->page_title, $b->page_title );
 989                 } else {
 990                         return $a->page_namespace - $b->page_namespace;
 991                 }
 992         }
 993
 994         /**
 995          * Returns the corresponding $wgImageLimits entry for the selected user option
 996          *
 997          * @param User $user
 998          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 999          * @return array
1000          * @since 1.21
1001          */
1002         public function getImageLimitsFromOption( $user, $optionName ) {
1003                 global $wgImageLimits;
1004
1005                 $option = $user->getIntOption( $optionName );
1006                 if ( !isset( $wgImageLimits[$option] ) ) {
1007                         $option = User::getDefaultOption( $optionName );
1008                 }
1009
1010                 // The user offset might still be incorrect, specially if
1011                 // $wgImageLimits got changed (see bug #8858).
1012                 if ( !isset( $wgImageLimits[$option] ) ) {
1013                         // Default to the first offset in $wgImageLimits
1014                         $option = 0;
1015                 }
1016
1017                 return isset( $wgImageLimits[$option] )
1018                         ? $wgImageLimits[$option]
1019                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
1020         }
1021
1022         /**
1023          * Output a drop-down box for language options for the file
1024          *
1025          * @param array $langChoices Array of string language codes
1026          * @param string $curLang Language code file is being viewed in.
1027          * @param string $defaultLang Language code that image is rendered in by default
1028          * @return string HTML to insert underneath image.
1029          */
1030         protected function doRenderLangOpt( array $langChoices, $curLang, $defaultLang ) {
1031                 global $wgScript;
1032                 sort( $langChoices );
1033                 $curLang = wfBCP47( $curLang );
1034                 $defaultLang = wfBCP47( $defaultLang );
1035                 $opts = '';
1036                 $haveCurrentLang = false;
1037                 $haveDefaultLang = false;
1038
1039                 // We make a list of all the language choices in the file.
1040                 // Additionally if the default language to render this file
1041                 // is not included as being in this file (for example, in svgs
1042                 // usually the fallback content is the english content) also
1043                 // include a choice for that. Last of all, if we're viewing
1044                 // the file in a language not on the list, add it as a choice.
1045                 foreach ( $langChoices as $lang ) {
1046                         $code = wfBCP47( $lang );
1047                         $name = Language::fetchLanguageName( $code, $this->getContext()->getLanguage()->getCode() );
1048                         if ( $name !== '' ) {
1049                                 $display = $this->getContext()->msg( 'img-lang-opt', $code, $name )->text();
1050                         } else {
1051                                 $display = $code;
1052                         }
1053                         $opts .= "\n" . Xml::option( $display, $code, $curLang === $code );
1054                         if ( $curLang === $code ) {
1055                                 $haveCurrentLang = true;
1056                         }
1057                         if ( $defaultLang === $code ) {
1058                                 $haveDefaultLang = true;
1059                         }
1060                 }
1061                 if ( !$haveDefaultLang ) {
1062                         // Its hard to know if the content is really in the default language, or
1063                         // if its just unmarked content that could be in any language.
1064                         $opts = Xml::option(
1065                                         $this->getContext()->msg( 'img-lang-default' )->text(),
1066                                 $defaultLang,
1067                                 $defaultLang === $curLang
1068                         ) . $opts;
1069                 }
1070                 if ( !$haveCurrentLang && $defaultLang !== $curLang ) {
1071                         $name = Language::fetchLanguageName( $curLang, $this->getContext()->getLanguage()->getCode() );
1072                         if ( $name !== '' ) {
1073                                 $display = $this->getContext()->msg( 'img-lang-opt', $curLang, $name )->text();
1074                         } else {
1075                                 $display = $curLang;
1076                         }
1077                         $opts = Xml::option( $display, $curLang, true ) . $opts;
1078                 }
1079
1080                 $select = Html::rawElement(
1081                         'select',
1082                         array( 'id' => 'mw-imglangselector', 'name' => 'lang' ),
1083                         $opts
1084                 );
1085                 $submit = Xml::submitButton( $this->getContext()->msg( 'img-lang-go' )->text() );
1086
1087                 $formContents = $this->getContext()->msg( 'img-lang-info' )
1088                         ->rawParams( $select, $submit )
1089                         ->parse();
1090                 $formContents .= Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() );
1091
1092                 $langSelectLine = Html::rawElement( 'div', array( 'id' => 'mw-imglangselector-line' ),
1093                         Html::rawElement( 'form', array( 'action' => $wgScript ), $formContents )
1094                 );
1095                 return $langSelectLine;
1096         }
1097
1098         /**
1099          * Get the width and height to display image at.
1100          *
1101          * @note This method assumes that it is only called if one
1102          *  of the dimensions are bigger than the max, or if the
1103          *  image is vectorized.
1104          *
1105          * @param int $maxWidth Max width to display at
1106          * @param int $maxHeight Max height to display at
1107          * @param int $width Actual width of the image
1108          * @param int $height Actual height of the image
1109          * @throws MWException
1110          * @return array Array (width, height)
1111          */
1112         protected function getDisplayWidthHeight( $maxWidth, $maxHeight, $width, $height ) {
1113                 if ( !$maxWidth || !$maxHeight ) {
1114                         // should never happen
1115                         throw new MWException( 'Using a choice from $wgImageLimits that is 0x0' );
1116                 }
1117
1118                 if ( !$width || !$height ) {
1119                         return array( 0, 0 );
1120                 }
1121
1122                 # Calculate the thumbnail size.
1123                 if ( $width <= $maxWidth && $height <= $maxHeight ) {
1124                         // Vectorized image, do nothing.
1125                 } elseif ( $width / $height >= $maxWidth / $maxHeight ) {
1126                         # The limiting factor is the width, not the height.
1127                         $height = round( $height * $maxWidth / $width );
1128                         $width = $maxWidth;
1129                         # Note that $height <= $maxHeight now.
1130                 } else {
1131                         $newwidth = floor( $width * $maxHeight / $height );
1132                         $height = round( $height * $newwidth / $width );
1133                         $width = $newwidth;
1134                         # Note that $height <= $maxHeight now, but might not be identical
1135                         # because of rounding.
1136                 }
1137                 return array( $width, $height );
1138         }
1139
1140         /**
1141          * Get alternative thumbnail sizes.
1142          *
1143          * @note This will only list several alternatives if thumbnails are rendered on 404
1144          * @param int $origWidth Actual width of image
1145          * @param int $origHeight Actual height of image
1146          * @return array An array of [width, height] pairs.
1147          */
1148         protected function getThumbSizes( $origWidth, $origHeight ) {
1149                 global $wgImageLimits;
1150                 if ( $this->displayImg->getRepo()->canTransformVia404() ) {
1151                         $thumbSizes = $wgImageLimits;
1152                         // Also include the full sized resolution in the list, so
1153                         // that users know they can get it. This will link to the
1154                         // original file asset if mustRender() === false. In the case
1155                         // that we mustRender, some users have indicated that they would
1156                         // find it useful to have the full size image in the rendered
1157                         // image format.
1158                         $thumbSizes[] = array( $origWidth, $origHeight );
1159                 } else {
1160                         # Creating thumb links triggers thumbnail generation.
1161                         # Just generate the thumb for the current users prefs.
1162                         $thumbSizes = array(
1163                                 $this->getImageLimitsFromOption( $this->getContext()->getUser(), 'thumbsize' )
1164                         );
1165                         if ( !$this->displayImg->mustRender() ) {
1166                                 // We can safely include a link to the "full-size" preview,
1167                                 // without actually rendering.
1168                                 $thumbSizes[] = array( $origWidth, $origHeight );
1169                         }
1170                 }
1171                 return $thumbSizes;
1172         }
1173
1174 }
1175
1176 /**
1177  * Builds the image revision log shown on image pages
1178  *
1179  * @ingroup Media
1180  */
1181 class ImageHistoryList extends ContextSource {
1182
1183         /**
1184          * @var Title
1185          */
1186         protected $title;
1187
1188         /**
1189          * @var File
1190          */
1191         protected $img;
1192
1193         /**
1194          * @var ImagePage
1195          */
1196         protected $imagePage;
1197
1198         /**
1199          * @var File
1200          */
1201         protected $current;
1202
1203         protected $repo, $showThumb;
1204         protected $preventClickjacking = false;
1205
1206         /**
1207          * @param ImagePage $imagePage
1208          */
1209         public function __construct( $imagePage ) {
1210                 global $wgShowArchiveThumbnails;
1211                 $this->current = $imagePage->getFile();
1212                 $this->img = $imagePage->getDisplayedFile();
1213                 $this->title = $imagePage->getTitle();
1214                 $this->imagePage = $imagePage;
1215                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
1216                 $this->setContext( $imagePage->getContext() );
1217         }
1218
1219         /**
1220          * @return ImagePage
1221          */
1222         public function getImagePage() {
1223                 return $this->imagePage;
1224         }
1225
1226         /**
1227          * @return File
1228          */
1229         public function getFile() {
1230                 return $this->img;
1231         }
1232
1233         /**
1234          * @param string $navLinks
1235          * @return string
1236          */
1237         public function beginImageHistoryList( $navLinks = '' ) {
1238                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() )
1239                         . "\n"
1240                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1241                         . $this->msg( 'filehist-help' )->parseAsBlock()
1242                         . $navLinks . "\n"
1243                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1244                         . '<tr><th></th>'
1245                         . ( $this->current->isLocal()
1246                                 && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<th></th>' : '' )
1247                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1248                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1249                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1250                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1251                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1252                         . "</tr>\n";
1253         }
1254
1255         /**
1256          * @param string $navLinks
1257          * @return string
1258          */
1259         public function endImageHistoryList( $navLinks = '' ) {
1260                 return "</table>\n$navLinks\n</div>\n";
1261         }
1262
1263         /**
1264          * @param bool $iscur
1265          * @param File $file
1266          * @return string
1267          */
1268         public function imageHistoryLine( $iscur, $file ) {
1269                 global $wgContLang;
1270
1271                 $user = $this->getUser();
1272                 $lang = $this->getLanguage();
1273                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1274                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1275                 $userId = $file->getUser( 'id' );
1276                 $userText = $file->getUser( 'text' );
1277                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1278
1279                 $local = $this->current->isLocal();
1280                 $row = $selected = '';
1281
1282                 // Deletion link
1283                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1284                         $row .= '<td>';
1285                         # Link to remove from history
1286                         if ( $user->isAllowed( 'delete' ) ) {
1287                                 $q = array( 'action' => 'delete' );
1288                                 if ( !$iscur ) {
1289                                         $q['oldimage'] = $img;
1290                                 }
1291                                 $row .= Linker::linkKnown(
1292                                         $this->title,
1293                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1294                                         array(), $q
1295                                 );
1296                         }
1297                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1298                         $canHide = $user->isAllowed( 'deleterevision' );
1299                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1300                                 if ( $user->isAllowed( 'delete' ) ) {
1301                                         $row .= '<br />';
1302                                 }
1303                                 // If file is top revision or locked from this user, don't link
1304                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1305                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1306                                 } else {
1307                                         list( $ts, ) = explode( '!', $img, 2 );
1308                                         $query = array(
1309                                                 'type' => 'oldimage',
1310                                                 'target' => $this->title->getPrefixedText(),
1311                                                 'ids' => $ts,
1312                                         );
1313                                         $del = Linker::revDeleteLink( $query,
1314                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1315                                 }
1316                                 $row .= $del;
1317                         }
1318                         $row .= '</td>';
1319                 }
1320
1321                 // Reversion link/current indicator
1322                 $row .= '<td>';
1323                 if ( $iscur ) {
1324                         $row .= $this->msg( 'filehist-current' )->escaped();
1325                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1326                         && $this->title->quickUserCan( 'upload', $user )
1327                 ) {
1328                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1329                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1330                         } else {
1331                                 $row .= Linker::linkKnown(
1332                                         $this->title,
1333                                         $this->msg( 'filehist-revert' )->escaped(),
1334                                         array(),
1335                                         array(
1336                                                 'action' => 'revert',
1337                                                 'oldimage' => $img,
1338                                                 'wpEditToken' => $user->getEditToken( $img )
1339                                         )
1340                                 );
1341                         }
1342                 }
1343                 $row .= '</td>';
1344
1345                 // Date/time and image link
1346                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1347                         $selected = "class='filehistory-selected'";
1348                 }
1349                 $row .= "<td $selected style='white-space: nowrap;'>";
1350                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1351                         # Don't link to unviewable files
1352                         $row .= '<span class="history-deleted">'
1353                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1354                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1355                         if ( $local ) {
1356                                 $this->preventClickjacking();
1357                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1358                                 # Make a link to review the image
1359                                 $url = Linker::linkKnown(
1360                                         $revdel,
1361                                         $lang->userTimeAndDate( $timestamp, $user ),
1362                                         array(),
1363                                         array(
1364                                                 'target' => $this->title->getPrefixedText(),
1365                                                 'file' => $img,
1366                                                 'token' => $user->getEditToken( $img )
1367                                         )
1368                                 );
1369                         } else {
1370                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1371                         }
1372                         $row .= '<span class="history-deleted">' . $url . '</span>';
1373                 } elseif ( !$file->exists() ) {
1374                         $row .= '<span class="mw-file-missing">'
1375                                 . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1376                 } else {
1377                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1378                         $row .= Xml::element(
1379                                 'a',
1380                                 array( 'href' => $url ),
1381                                 $lang->userTimeAndDate( $timestamp, $user )
1382                         );
1383                 }
1384                 $row .= "</td>";
1385
1386                 // Thumbnail
1387                 if ( $this->showThumb ) {
1388                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1389                 }
1390
1391                 // Image dimensions + size
1392                 $row .= '<td>';
1393                 $row .= htmlspecialchars( $file->getDimensionsString() );
1394                 $row .= $this->msg( 'word-separator' )->escaped();
1395                 $row .= '<span style="white-space: nowrap;">';
1396                 $row .= $this->msg( 'parentheses' )->sizeParams( $file->getSize() )->escaped();
1397                 $row .= '</span>';
1398                 $row .= '</td>';
1399
1400                 // Uploading user
1401                 $row .= '<td>';
1402                 // Hide deleted usernames
1403                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1404                         $row .= '<span class="history-deleted">'
1405                                 . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1406                 } else {
1407                         if ( $local ) {
1408                                 $row .= Linker::userLink( $userId, $userText );
1409                                 $row .= '<span style="white-space: nowrap;">';
1410                                 $row .= Linker::userToolLinks( $userId, $userText );
1411                                 $row .= '</span>';
1412                         } else {
1413                                 $row .= htmlspecialchars( $userText );
1414                         }
1415                 }
1416                 $row .= '</td>';
1417
1418                 // Don't show deleted descriptions
1419                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1420                         $row .= '<td><span class="history-deleted">' .
1421                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1422                 } else {
1423                         $row .= '<td dir="' . $wgContLang->getDir() . '">' .
1424                                 Linker::formatComment( $description, $this->title ) . '</td>';
1425                 }
1426
1427                 $rowClass = null;
1428                 Hooks::run( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1429                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1430
1431                 return "<tr{$classAttr}>{$row}</tr>\n";
1432         }
1433
1434         /**
1435          * @param File $file
1436          * @return string
1437          */
1438         protected function getThumbForLine( $file ) {
1439                 $lang = $this->getLanguage();
1440                 $user = $this->getUser();
1441                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1442                         && !$file->isDeleted( File::DELETED_FILE )
1443                 ) {
1444                         $params = array(
1445                                 'width' => '120',
1446                                 'height' => '120',
1447                         );
1448                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1449
1450                         $thumbnail = $file->transform( $params );
1451                         $options = array(
1452                                 'alt' => $this->msg( 'filehist-thumbtext',
1453                                         $lang->userTimeAndDate( $timestamp, $user ),
1454                                         $lang->userDate( $timestamp, $user ),
1455                                         $lang->userTime( $timestamp, $user ) )->text(),
1456                                 'file-link' => true,
1457                         );
1458
1459                         if ( !$thumbnail ) {
1460                                 return $this->msg( 'filehist-nothumb' )->escaped();
1461                         }
1462
1463                         return $thumbnail->toHtml( $options );
1464                 } else {
1465                         return $this->msg( 'filehist-nothumb' )->escaped();
1466                 }
1467         }
1468
1469         /**
1470          * @param bool $enable
1471          */
1472         protected function preventClickjacking( $enable = true ) {
1473                 $this->preventClickjacking = $enable;
1474         }
1475
1476         /**
1477          * @return bool
1478          */
1479         public function getPreventClickjacking() {
1480                 return $this->preventClickjacking;
1481         }
1482 }
1483
1484 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1485         protected $preventClickjacking = false;
1486
1487         /**
1488          * @var File
1489          */
1490         protected $mImg;
1491
1492         /**
1493          * @var Title
1494          */
1495         protected $mTitle;
1496
1497         /**
1498          * @param ImagePage $imagePage
1499          */
1500         function __construct( $imagePage ) {
1501                 parent::__construct( $imagePage->getContext() );
1502                 $this->mImagePage = $imagePage;
1503                 $this->mTitle = clone ( $imagePage->getTitle() );
1504                 $this->mTitle->setFragment( '#filehistory' );
1505                 $this->mImg = null;
1506                 $this->mHist = array();
1507                 $this->mRange = array( 0, 0 ); // display range
1508         }
1509
1510         /**
1511          * @return Title
1512          */
1513         function getTitle() {
1514                 return $this->mTitle;
1515         }
1516
1517         function getQueryInfo() {
1518                 return false;
1519         }
1520
1521         /**
1522          * @return string
1523          */
1524         function getIndexField() {
1525                 return '';
1526         }
1527
1528         /**
1529          * @param object $row
1530          * @return string
1531          */
1532         function formatRow( $row ) {
1533                 return '';
1534         }
1535
1536         /**
1537          * @return string
1538          */
1539         function getBody() {
1540                 $s = '';
1541                 $this->doQuery();
1542                 if ( count( $this->mHist ) ) {
1543                         if ( $this->mImg->isLocal() ) {
1544                                 // Do a batch existence check for user pages and talkpages
1545                                 $linkBatch = new LinkBatch();
1546                                 for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1547                                         $file = $this->mHist[$i];
1548                                         $user = $file->getUser( 'text' );
1549                                         $linkBatch->add( NS_USER, $user );
1550                                         $linkBatch->add( NS_USER_TALK, $user );
1551                                 }
1552                                 $linkBatch->execute();
1553                         }
1554
1555                         $list = new ImageHistoryList( $this->mImagePage );
1556                         # Generate prev/next links
1557                         $navLink = $this->getNavigationBar();
1558                         $s = $list->beginImageHistoryList( $navLink );
1559                         // Skip rows there just for paging links
1560                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1561                                 $file = $this->mHist[$i];
1562                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1563                         }
1564                         $s .= $list->endImageHistoryList( $navLink );
1565
1566                         if ( $list->getPreventClickjacking() ) {
1567                                 $this->preventClickjacking();
1568                         }
1569                 }
1570                 return $s;
1571         }
1572
1573         function doQuery() {
1574                 if ( $this->mQueryDone ) {
1575                         return;
1576                 }
1577                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1578                 if ( !$this->mImg->exists() ) {
1579                         return;
1580                 }
1581                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1582                 if ( $this->mIsBackwards ) {
1583                         // Fetch the file history
1584                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1585                         // The current rev may not meet the offset/limit
1586                         $numRows = count( $this->mHist );
1587                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1588                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1589                         }
1590                 } else {
1591                         // The current rev may not meet the offset
1592                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1593                                 $this->mHist[] = $this->mImg;
1594                         }
1595                         // Old image versions (fetch extra row for nav links)
1596                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1597                         // Fetch the file history
1598                         $this->mHist = array_merge( $this->mHist,
1599                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1600                 }
1601                 $numRows = count( $this->mHist ); // Total number of query results
1602                 if ( $numRows ) {
1603                         # Index value of top item in the list
1604                         $firstIndex = $this->mIsBackwards ?
1605                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1606                         # Discard the extra result row if there is one
1607                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1608                                 if ( $this->mIsBackwards ) {
1609                                         # Index value of item past the index
1610                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1611                                         # Index value of bottom item in the list
1612                                         $lastIndex = $this->mHist[1]->getTimestamp();
1613                                         # Display range
1614                                         $this->mRange = array( 1, $numRows - 1 );
1615                                 } else {
1616                                         # Index value of item past the index
1617                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1618                                         # Index value of bottom item in the list
1619                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1620                                         # Display range
1621                                         $this->mRange = array( 0, $numRows - 2 );
1622                                 }
1623                         } else {
1624                                 # Setting indexes to an empty string means that they will be
1625                                 # omitted if they would otherwise appear in URLs. It just so
1626                                 # happens that this  is the right thing to do in the standard
1627                                 # UI, in all the relevant cases.
1628                                 $this->mPastTheEndIndex = '';
1629                                 # Index value of bottom item in the list
1630                                 $lastIndex = $this->mIsBackwards ?
1631                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1632                                 # Display range
1633                                 $this->mRange = array( 0, $numRows - 1 );
1634                         }
1635                 } else {
1636                         $firstIndex = '';
1637                         $lastIndex = '';
1638                         $this->mPastTheEndIndex = '';
1639                 }
1640                 if ( $this->mIsBackwards ) {
1641                         $this->mIsFirst = ( $numRows < $queryLimit );
1642                         $this->mIsLast = ( $this->mOffset == '' );
1643                         $this->mLastShown = $firstIndex;
1644                         $this->mFirstShown = $lastIndex;
1645                 } else {
1646                         $this->mIsFirst = ( $this->mOffset == '' );
1647                         $this->mIsLast = ( $numRows < $queryLimit );
1648                         $this->mLastShown = $lastIndex;
1649                         $this->mFirstShown = $firstIndex;
1650                 }
1651                 $this->mQueryDone = true;
1652         }
1653
1654         /**
1655          * @param bool $enable
1656          */
1657         protected function preventClickjacking( $enable = true ) {
1658                 $this->preventClickjacking = $enable;
1659         }
1660
1661         /**
1662          * @return bool
1663          */
1664         public function getPreventClickjacking() {
1665                 return $this->preventClickjacking;
1666         }
1667
1668 }