includes/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
  30         /**
  31          * @var File
  32          */
  33         private $displayImg;
  34         /**
  35          * @var FileRepo
  36          */
  37         private $repo;
  38         private $fileLoaded;
  39
  40         var $mExtraDescription = false;
  41
  42         /**
  43          * @param $title Title
  44          * @return WikiFilePage
  45          */
  46         protected function newPage( Title $title ) {
  47                 // Overload mPage with a file-specific page
  48                 return new WikiFilePage( $title );
  49         }
  50
  51         /**
  52          * Constructor from a page id
  53          * @param int $id article ID to load
  54          * @return ImagePage|null
  55          */
  56         public static function newFromID( $id ) {
  57                 $t = Title::newFromID( $id );
  58                 # @todo FIXME: Doesn't inherit right
  59                 return $t == null ? null : new self( $t );
  60                 # return $t == null ? null : new static( $t ); // PHP 5.3
  61         }
  62
  63         /**
  64          * @param $file File:
  65          * @return void
  66          */
  67         public function setFile( $file ) {
  68                 $this->mPage->setFile( $file );
  69                 $this->displayImg = $file;
  70                 $this->fileLoaded = true;
  71         }
  72
  73         protected function loadFile() {
  74                 if ( $this->fileLoaded ) {
  75                         return;
  76                 }
  77                 $this->fileLoaded = true;
  78
  79                 $this->displayImg = $img = false;
  80                 wfRunHooks( 'ImagePageFindFile', array( $this, &$img, &$this->displayImg ) );
  81                 if ( !$img ) { // not set by hook?
  82                         $img = wfFindFile( $this->getTitle() );
  83                         if ( !$img ) {
  84                                 $img = wfLocalFile( $this->getTitle() );
  85                         }
  86                 }
  87                 $this->mPage->setFile( $img );
  88                 if ( !$this->displayImg ) { // not set by hook?
  89                         $this->displayImg = $img;
  90                 }
  91                 $this->repo = $img->getRepo();
  92         }
  93
  94         /**
  95          * Handler for action=render
  96          * Include body text only; none of the image extras
  97          */
  98         public function render() {
  99                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
 100                 parent::view();
 101         }
 102
 103         public function view() {
 104                 global $wgShowEXIF;
 105
 106                 $out = $this->getContext()->getOutput();
 107                 $request = $this->getContext()->getRequest();
 108                 $diff = $request->getVal( 'diff' );
 109                 $diffOnly = $request->getBool( 'diffonly', $this->getContext()->getUser()->getOption( 'diffonly' ) );
 110
 111                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( $diff !== null && $diffOnly ) ) {
 112                         parent::view();
 113                         return;
 114                 }
 115
 116                 $this->loadFile();
 117
 118                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
 119                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || $diff !== null ) {
 120                                 // mTitle is the same as the redirect target so ask Article
 121                                 // to perform the redirect for us.
 122                                 $request->setVal( 'diffonly', 'true' );
 123                                 parent::view();
 124                                 return;
 125                         } else {
 126                                 // mTitle is not the same as the redirect target so it is
 127                                 // probably the redirect page itself. Fake the redirect symbol
 128                                 $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 129                                 $out->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 130                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 131                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 132                                 return;
 133                         }
 134                 }
 135
 136                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 137                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 138                         $formattedMetadata = $this->displayImg->formatMetadata();
 139                         $showmeta = $formattedMetadata !== false;
 140                 } else {
 141                         $showmeta = false;
 142                 }
 143
 144                 if ( !$diff && $this->displayImg->exists() ) {
 145                         $out->addHTML( $this->showTOC( $showmeta ) );
 146                 }
 147
 148                 if ( !$diff ) {
 149                         $this->openShowImage();
 150                 }
 151
 152                 # No need to display noarticletext, we use our own message, output in openShowImage()
 153                 if ( $this->mPage->getID() ) {
 154                         # NS_FILE is in the user language, but this section (the actual wikitext)
 155                         # should be in page content language
 156                         $pageLang = $this->getTitle()->getPageViewLanguage();
 157                         $out->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 158                                 'lang' => $pageLang->getHtmlCode(), 'dir' => $pageLang->getDir(),
 159                                 'class' => 'mw-content-' . $pageLang->getDir() ) ) );
 160
 161                         parent::view();
 162
 163                         $out->addHTML( Xml::closeElement( 'div' ) );
 164                 } else {
 165                         # Just need to set the right headers
 166                         $out->setArticleFlag( true );
 167                         $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 168                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 169                 }
 170
 171                 # Show shared description, if needed
 172                 if ( $this->mExtraDescription ) {
 173                         $fol = wfMessage( 'shareddescriptionfollows' );
 174                         if ( !$fol->isDisabled() ) {
 175                                 $out->addWikiText( $fol->plain() );
 176                         }
 177                         $out->addHTML( '<div id="shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 178                 }
 179
 180                 $this->closeShowImage();
 181                 $this->imageHistory();
 182                 // TODO: Cleanup the following
 183
 184                 $out->addHTML( Xml::element( 'h2',
 185                         array( 'id' => 'filelinks' ),
 186                         wfMessage( 'imagelinks' )->text() ) . "\n" );
 187                 $this->imageDupes();
 188                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 189                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 190                 $this->imageLinks();
 191
 192                 # Allow extensions to add something after the image links
 193                 $html = '';
 194                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 195                 if ( $html ) {
 196                         $out->addHTML( $html );
 197                 }
 198
 199                 if ( $showmeta ) {
 200                         $out->addHTML( Xml::element(
 201                                 'h2',
 202                                 array( 'id' => 'metadata' ),
 203                                 wfMessage( 'metadata' )->text() ) . "\n" );
 204                         $out->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 205                         $out->addModules( array( 'mediawiki.action.view.metadata' ) );
 206                 }
 207
 208                 // Add remote Filepage.css
 209                 if ( !$this->repo->isLocal() ) {
 210                         $css = $this->repo->getDescriptionStylesheetUrl();
 211                         if ( $css ) {
 212                                 $out->addStyle( $css );
 213                         }
 214                 }
 215                 // always show the local local Filepage.css, bug 29277
 216                 $out->addModuleStyles( 'filepage' );
 217         }
 218
 219         /**
 220          * @return File
 221          */
 222         public function getDisplayedFile() {
 223                 $this->loadFile();
 224                 return $this->displayImg;
 225         }
 226
 227         /**
 228          * Create the TOC
 229          *
 230          * @param $metadata Boolean: whether or not to show the metadata link
 231          * @return String
 232          */
 233         protected function showTOC( $metadata ) {
 234                 $r = array(
 235                         '<li><a href="#file">' . wfMessage( 'file-anchor-link' )->escaped() . '</a></li>',
 236                         '<li><a href="#filehistory">' . wfMessage( 'filehist' )->escaped() . '</a></li>',
 237                         '<li><a href="#filelinks">' . wfMessage( 'imagelinks' )->escaped() . '</a></li>',
 238                 );
 239                 if ( $metadata ) {
 240                         $r[] = '<li><a href="#metadata">' . wfMessage( 'metadata' )->escaped() . '</a></li>';
 241                 }
 242
 243                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 244
 245                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 246         }
 247
 248         /**
 249          * Make a table with metadata to be shown in the output page.
 250          *
 251          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 252          *
 253          * @param array $metadata the array containing the Exif data
 254          * @return String The metadata table. This is treated as Wikitext (!)
 255          */
 256         protected function makeMetadataTable( $metadata ) {
 257                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 258                 $r .= wfMessage( 'metadata-help' )->plain();
 259                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 260                 foreach ( $metadata as $type => $stuff ) {
 261                         foreach ( $stuff as $v ) {
 262                                 # @todo FIXME: Why is this using escapeId for a class?!
 263                                 $class = Sanitizer::escapeId( $v['id'] );
 264                                 if ( $type == 'collapsed' ) {
 265                                         $class .= ' collapsable'; // sic
 266                                 }
 267                                 $r .= "<tr class=\"$class\">\n";
 268                                 $r .= "<th>{$v['name']}</th>\n";
 269                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 270                         }
 271                 }
 272                 $r .= "</table>\n</div>\n";
 273                 return $r;
 274         }
 275
 276         /**
 277          * Overloading Article's getContentObject method.
 278          *
 279          * Omit noarticletext if sharedupload; text will be fetched from the
 280          * shared upload server if possible.
 281          * @return string
 282          */
 283         public function getContentObject() {
 284                 $this->loadFile();
 285                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 286                         return null;
 287                 }
 288                 return parent::getContentObject();
 289         }
 290
 291         protected function openShowImage() {
 292                 global $wgImageLimits, $wgEnableUploads, $wgSend404Code;
 293
 294                 $this->loadFile();
 295                 $out = $this->getContext()->getOutput();
 296                 $user = $this->getContext()->getUser();
 297                 $lang = $this->getContext()->getLanguage();
 298                 $dirmark = $lang->getDirMarkEntity();
 299                 $request = $this->getContext()->getRequest();
 300
 301                 $max = $this->getImageLimitsFromOption( $user, 'imagesize' );
 302                 $maxWidth = $max[0];
 303                 $maxHeight = $max[1];
 304
 305                 if ( $this->displayImg->exists() ) {
 306                         # image
 307                         $page = $request->getIntOrNull( 'page' );
 308                         if ( is_null( $page ) ) {
 309                                 $params = array();
 310                                 $page = 1;
 311                         } else {
 312                                 $params = array( 'page' => $page );
 313                         }
 314                         $width_orig = $this->displayImg->getWidth( $page );
 315                         $width = $width_orig;
 316                         $height_orig = $this->displayImg->getHeight( $page );
 317                         $height = $height_orig;
 318
 319                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 320                         $linktext = $filename;
 321
 322                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 323
 324                         if ( $this->displayImg->allowInlineDisplay() ) {
 325                                 # image
 326
 327                                 # "Download high res version" link below the image
 328                                 # $msgsize = wfMessage( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 329                                 # We'll show a thumbnail of this image
 330                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 331                                         # Calculate the thumbnail size.
 332                                         # First case, the limiting factor is the width, not the height.
 333                                         if ( $width / $height >= $maxWidth / $maxHeight ) { // FIXME: Possible division by 0. bug 36911
 334                                                 $height = round( $height * $maxWidth / $width ); // FIXME: Possible division by 0. bug 36911
 335                                                 $width = $maxWidth;
 336                                                 # Note that $height <= $maxHeight now.
 337                                         } else {
 338                                                 $newwidth = floor( $width * $maxHeight / $height ); // FIXME: Possible division by 0. bug 36911
 339                                                 $height = round( $height * $newwidth / $width ); // FIXME: Possible division by 0. bug 36911
 340                                                 $width = $newwidth;
 341                                                 # Note that $height <= $maxHeight now, but might not be identical
 342                                                 # because of rounding.
 343                                         }
 344                                         $linktext = wfMessage( 'show-big-image' )->escaped();
 345                                         if ( $this->displayImg->getRepo()->canTransformVia404() ) {
 346                                                 $thumbSizes = $wgImageLimits;
 347                                         } else {
 348                                                 # Creating thumb links triggers thumbnail generation.
 349                                                 # Just generate the thumb for the current users prefs.
 350                                                 $thumbSizes = array( $this->getImageLimitsFromOption( $user, 'thumbsize' ) );
 351                                         }
 352                                         # Generate thumbnails or thumbnail links as needed...
 353                                         $otherSizes = array();
 354                                         foreach ( $thumbSizes as $size ) {
 355                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig
 356                                                         && $size[0] != $width && $size[1] != $height )
 357                                                 {
 358                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 359                                                         if ( $sizeLink ) {
 360                                                                 $otherSizes[] = $sizeLink;
 361                                                         }
 362                                                 }
 363                                         }
 364                                         $msgsmall = '';
 365                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 366                                         if ( $sizeLinkBigImagePreview ) {
 367                                                 $msgsmall .= wfMessage( 'show-big-image-preview' )->
 368                                                         rawParams( $sizeLinkBigImagePreview )->
 369                                                         parse();
 370                                         }
 371                                         if ( count( $otherSizes ) ) {
 372                                                 $msgsmall .= ' ' .
 373                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 374                                                         wfMessage( 'show-big-image-other' )->rawParams( $lang->pipeList( $otherSizes ) )->
 375                                                         params( count( $otherSizes ) )->parse()
 376                                                 );
 377                                         }
 378                                 } elseif ( $width == 0 && $height == 0 ) {
 379                                         # Some sort of audio file that doesn't have dimensions
 380                                         # Don't output a no hi res message for such a file
 381                                         $msgsmall = '';
 382                                 } elseif ( $this->displayImg->isVectorized() ) {
 383                                         # For vectorized images, full size is just the frame size
 384                                         $msgsmall = '';
 385                                 } else {
 386                                         # Image is small enough to show full size on image page
 387                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 388                                 }
 389
 390                                 $params['width'] = $width;
 391                                 $params['height'] = $height;
 392                                 $thumbnail = $this->displayImg->transform( $params );
 393
 394                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 395
 396                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 397                                 if ( $isMulti ) {
 398                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 399                                 }
 400
 401                                 if ( $thumbnail ) {
 402                                         $options = array(
 403                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 404                                                 'file-link' => true,
 405                                         );
 406                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 407                                                 $thumbnail->toHtml( $options ) .
 408                                                 $anchorclose . "</div>\n" );
 409                                 }
 410
 411                                 if ( $isMulti ) {
 412                                         $count = $this->displayImg->pageCount();
 413
 414                                         if ( $page > 1 ) {
 415                                                 $label = $out->parse( wfMessage( 'imgmultipageprev' )->text(), false );
 416                                                 $link = Linker::linkKnown(
 417                                                         $this->getTitle(),
 418                                                         $label,
 419                                                         array(),
 420                                                         array( 'page' => $page - 1 )
 421                                                 );
 422                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 423                                                         array( 'page' => $page - 1 ) );
 424                                         } else {
 425                                                 $thumb1 = '';
 426                                         }
 427
 428                                         if ( $page < $count ) {
 429                                                 $label = wfMessage( 'imgmultipagenext' )->text();
 430                                                 $link = Linker::linkKnown(
 431                                                         $this->getTitle(),
 432                                                         $label,
 433                                                         array(),
 434                                                         array( 'page' => $page + 1 )
 435                                                 );
 436                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 437                                                         array( 'page' => $page + 1 ) );
 438                                         } else {
 439                                                 $thumb2 = '';
 440                                         }
 441
 442                                         global $wgScript;
 443
 444                                         $formParams = array(
 445                                                 'name' => 'pageselector',
 446                                                 'action' => $wgScript,
 447                                                 'onchange' => 'document.pageselector.submit();',
 448                                         );
 449                                         $options = array();
 450                                         for ( $i = 1; $i <= $count; $i++ ) {
 451                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 452                                         }
 453                                         $select = Xml::tags( 'select',
 454                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 455                                                 implode( "\n", $options ) );
 456
 457                                         $out->addHTML(
 458                                                 '</td><td><div class="multipageimagenavbox">' .
 459                                                 Xml::openElement( 'form', $formParams ) .
 460                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 461                                                         wfMessage( 'imgmultigoto' )->rawParams( $select )->parse() .
 462                                                 Xml::submitButton( wfMessage( 'imgmultigo' )->text() ) .
 463                                                 Xml::closeElement( 'form' ) .
 464                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 465                                         );
 466                                 }
 467                         } elseif ( $this->displayImg->isSafeFile() ) {
 468                                 # if direct link is allowed but it's not a renderable image, show an icon.
 469                                 $icon = $this->displayImg->iconThumb();
 470
 471                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 472                                         $icon->toHtml( array( 'file-link' => true ) ) .
 473                                         "</div>\n" );
 474                         }
 475
 476                         $longDesc = wfMessage( 'parentheses', $this->displayImg->getLongDesc() )->text();
 477
 478                         $medialink = "[[Media:$filename|$linktext]]";
 479
 480                         if ( !$this->displayImg->isSafeFile() ) {
 481                                 $warning = wfMessage( 'mediawarning' )->plain();
 482                                 // dirmark is needed here to separate the file name, which
 483                                 // most likely ends in Latin characters, from the description,
 484                                 // which may begin with the file type. In RTL environment
 485                                 // this will get messy.
 486                                 // The dirmark, however, must not be immediately adjacent
 487                                 // to the filename, because it can get copied with it.
 488                                 // See bug 25277.
 489                                 $out->addWikiText( <<<EOT
 490 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 491 <div class="mediaWarning">$warning</div>
 492 EOT
 493                                         );
 494                         } else {
 495                                 $out->addWikiText( <<<EOT
 496 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 497 </div>
 498 EOT
 499                                 );
 500                         }
 501
 502                         // Add cannot animate thumbnail warning
 503                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 504                                 // Include the extension so wiki admins can
 505                                 // customize it on a per file-type basis
 506                                 // (aka say things like use format X instead).
 507                                 // additionally have a specific message for
 508                                 // file-no-thumb-animation-gif
 509                                 $ext = $this->displayImg->getExtension();
 510                                 $noAnimMesg = wfMessageFallback(
 511                                         'file-no-thumb-animation-' . $ext,
 512                                         'file-no-thumb-animation'
 513                                 )->plain();
 514
 515                                 $out->addWikiText( <<<EOT
 516 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 517 EOT
 518                                 );
 519                         }
 520
 521                         if ( !$this->displayImg->isLocal() ) {
 522                                 $this->printSharedImageText();
 523                         }
 524                 } else {
 525                         # Image does not exist
 526                         if ( !$this->getID() ) {
 527                                 # No article exists either
 528                                 # Show deletion log to be consistent with normal articles
 529                                 LogEventsList::showLogExtract(
 530                                         $out,
 531                                         array( 'delete', 'move' ),
 532                                         $this->getTitle()->getPrefixedText(),
 533                                         '',
 534                                         array( 'lim' => 10,
 535                                                 'conds' => array( "log_action != 'revision'" ),
 536                                                 'showIfEmpty' => false,
 537                                                 'msgKey' => array( 'moveddeleted-notice' )
 538                                         )
 539                                 );
 540                         }
 541
 542                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 543                                 // Only show an upload link if the user can upload
 544                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 545                                 $nofile = array(
 546                                         'filepage-nofile-link',
 547                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 548                                 );
 549                         } else {
 550                                 $nofile = 'filepage-nofile';
 551                         }
 552                         // Note, if there is an image description page, but
 553                         // no image, then this setRobotPolicy is overridden
 554                         // by Article::View().
 555                         $out->setRobotPolicy( 'noindex,nofollow' );
 556                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 557                         if ( !$this->getID() && $wgSend404Code ) {
 558                                 // If there is no image, no shared image, and no description page,
 559                                 // output a 404, to be consistent with articles.
 560                                 $request->response()->header( 'HTTP/1.1 404 Not Found' );
 561                         }
 562                 }
 563                 $out->setFileVersion( $this->displayImg );
 564         }
 565
 566         /**
 567          * Creates an thumbnail of specified size and returns an HTML link to it
 568          * @param array $params Scaler parameters
 569          * @param $width int
 570          * @param $height int
 571          * @return string
 572          */
 573         private function makeSizeLink( $params, $width, $height ) {
 574                 $params['width'] = $width;
 575                 $params['height'] = $height;
 576                 $thumbnail = $this->displayImg->transform( $params );
 577                 if ( $thumbnail && !$thumbnail->isError() ) {
 578                         return Html::rawElement( 'a', array(
 579                                 'href' => $thumbnail->getUrl(),
 580                                 'class' => 'mw-thumbnail-link'
 581                                 ), wfMessage( 'show-big-image-size' )->numParams(
 582                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 583                                 )->parse() );
 584                 } else {
 585                         return '';
 586                 }
 587         }
 588
 589         /**
 590          * Show a notice that the file is from a shared repository
 591          */
 592         protected function printSharedImageText() {
 593                 $out = $this->getContext()->getOutput();
 594                 $this->loadFile();
 595
 596                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 597                 $descText = $this->mPage->getFile()->getDescriptionText();
 598
 599                 /* Add canonical to head if there is no local page for this shared file */
 600                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 601                         $out->setCanonicalUrl( $descUrl );
 602                 }
 603
 604                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 605                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 606
 607                 if ( $descUrl && $descText && wfMessage( 'sharedupload-desc-here' )->plain() !== '-' ) {
 608                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 609                 } elseif ( $descUrl && wfMessage( 'sharedupload-desc-there' )->plain() !== '-' ) {
 610                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 611                 } else {
 612                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 613                 }
 614
 615                 if ( $descText ) {
 616                         $this->mExtraDescription = $descText;
 617                 }
 618         }
 619
 620         public function getUploadUrl() {
 621                 $this->loadFile();
 622                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 623                 return $uploadTitle->getFullURL( array(
 624                         'wpDestFile' => $this->mPage->getFile()->getName(),
 625                         'wpForReUpload' => 1
 626                 ) );
 627         }
 628
 629         /**
 630          * Print out the various links at the bottom of the image page, e.g. reupload,
 631          * external editing (and instructions link) etc.
 632          */
 633         protected function uploadLinksBox() {
 634                 global $wgEnableUploads;
 635
 636                 if ( !$wgEnableUploads ) {
 637                         return;
 638                 }
 639
 640                 $this->loadFile();
 641                 if ( !$this->mPage->getFile()->isLocal() ) {
 642                         return;
 643                 }
 644
 645                 $out = $this->getContext()->getOutput();
 646                 $out->addHTML( "<ul>\n" );
 647
 648                 # "Upload a new version of this file" link
 649                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 650                 if ( $canUpload && UploadBase::userCanReUpload( $this->getContext()->getUser(), $this->mPage->getFile()->name ) ) {
 651                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMessage( 'uploadnewversion-linktext' )->text() );
 652                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 653                 } else {
 654                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">" . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 655                 }
 656
 657                 $out->addHTML( "</ul>\n" );
 658         }
 659
 660         protected function closeShowImage() { } # For overloading
 661
 662         /**
 663          * If the page we've just displayed is in the "Image" namespace,
 664          * we follow it with an upload history of the image and its usage.
 665          */
 666         protected function imageHistory() {
 667                 $this->loadFile();
 668                 $out = $this->getContext()->getOutput();
 669                 $pager = new ImageHistoryPseudoPager( $this );
 670                 $out->addHTML( $pager->getBody() );
 671                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 672
 673                 $this->mPage->getFile()->resetHistory(); // free db resources
 674
 675                 # Exist check because we don't want to show this on pages where an image
 676                 # doesn't exist along with the noimage message, that would suck. -ævar
 677                 if ( $this->mPage->getFile()->exists() ) {
 678                         $this->uploadLinksBox();
 679                 }
 680         }
 681
 682         /**
 683          * @param $target
 684          * @param $limit
 685          * @return ResultWrapper
 686          */
 687         protected function queryImageLinks( $target, $limit ) {
 688                 $dbr = wfGetDB( DB_SLAVE );
 689
 690                 return $dbr->select(
 691                         array( 'imagelinks', 'page' ),
 692                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 693                         array( 'il_to' => $target, 'il_from = page_id' ),
 694                         __METHOD__,
 695                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 696                 );
 697         }
 698
 699         protected function imageLinks() {
 700                 $limit = 100;
 701
 702                 $out = $this->getContext()->getOutput();
 703                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 704                 $rows = array();
 705                 $redirects = array();
 706                 foreach ( $res as $row ) {
 707                         if ( $row->page_is_redirect ) {
 708                                 $redirects[$row->page_title] = array();
 709                         }
 710                         $rows[] = $row;
 711                 }
 712                 $count = count( $rows );
 713
 714                 $hasMore = $count > $limit;
 715                 if ( !$hasMore && count( $redirects ) ) {
 716                         $res = $this->queryImageLinks( array_keys( $redirects ),
 717                                 $limit - count( $rows ) + 1 );
 718                         foreach ( $res as $row ) {
 719                                 $redirects[$row->il_to][] = $row;
 720                                 $count++;
 721                         }
 722                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 723                 }
 724
 725                 if ( $count == 0 ) {
 726                         $out->wrapWikiMsg(
 727                                 Html::rawElement( 'div',
 728                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 729                                 'nolinkstoimage'
 730                         );
 731                         return;
 732                 }
 733
 734                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 735                 if ( !$hasMore ) {
 736                         $out->addWikiMsg( 'linkstoimage', $count );
 737                 } else {
 738                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 739                         $out->addWikiMsg( 'linkstoimage-more',
 740                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 741                                 $this->getTitle()->getPrefixedDBkey()
 742                         );
 743                 }
 744
 745                 $out->addHTML(
 746                         Html::openElement( 'ul',
 747                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 748                 );
 749                 $count = 0;
 750
 751                 // Sort the list by namespace:title
 752                 usort( $rows, array( $this, 'compare' ) );
 753
 754                 // Create links for every element
 755                 $currentCount = 0;
 756                 foreach ( $rows as $element ) {
 757                         $currentCount++;
 758                         if ( $currentCount > $limit ) {
 759                                 break;
 760                         }
 761
 762                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 763                         if ( !isset( $redirects[$element->page_title] ) ) {
 764                                 # No redirects
 765                                 $liContents = $link;
 766                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 767                                 # Redirect without usages
 768                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 769                         } else {
 770                                 # Redirect with usages
 771                                 $li = '';
 772                                 foreach ( $redirects[$element->page_title] as $row ) {
 773                                         $currentCount++;
 774                                         if ( $currentCount > $limit ) {
 775                                                 break;
 776                                         }
 777
 778                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 779                                         $li .= Html::rawElement(
 780                                                 'li',
 781                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 782                                                 $link2
 783                                                 ) . "\n";
 784                                 }
 785
 786                                 $ul = Html::rawElement(
 787                                         'ul',
 788                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 789                                         $li
 790                                         ) . "\n";
 791                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 792                                         $link, $ul )->parse();
 793                         }
 794                         $out->addHTML( Html::rawElement(
 795                                         'li',
 796                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 797                                         $liContents
 798                                 ) . "\n"
 799                         );
 800
 801                 };
 802                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 803                 $res->free();
 804
 805                 // Add a links to [[Special:Whatlinkshere]]
 806                 if ( $count > $limit ) {
 807                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 808                 }
 809                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 810         }
 811
 812         protected function imageDupes() {
 813                 $this->loadFile();
 814                 $out = $this->getContext()->getOutput();
 815
 816                 $dupes = $this->mPage->getDuplicates();
 817                 if ( count( $dupes ) == 0 ) {
 818                         return;
 819                 }
 820
 821                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 822                 $out->addWikiMsg( 'duplicatesoffile',
 823                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 824                 );
 825                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 826
 827                 /**
 828                  * @var $file File
 829                  */
 830                 foreach ( $dupes as $file ) {
 831                         $fromSrc = '';
 832                         if ( $file->isLocal() ) {
 833                                 $link = Linker::linkKnown( $file->getTitle() );
 834                         } else {
 835                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 836                                         $file->getTitle()->getPrefixedText() );
 837                                 $fromSrc = wfMessage( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 838                         }
 839                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 840                 }
 841                 $out->addHTML( "</ul></div>\n" );
 842         }
 843
 844         /**
 845          * Delete the file, or an earlier version of it
 846          */
 847         public function delete() {
 848                 $file = $this->mPage->getFile();
 849                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 850                         // Standard article deletion
 851                         parent::delete();
 852                         return;
 853                 }
 854
 855                 $deleter = new FileDeleteForm( $file );
 856                 $deleter->execute();
 857         }
 858
 859         /**
 860          * Display an error with a wikitext description
 861          *
 862          * @param $description String
 863          */
 864         function showError( $description ) {
 865                 $out = $this->getContext()->getOutput();
 866                 $out->setPageTitle( wfMessage( 'internalerror' ) );
 867                 $out->setRobotPolicy( 'noindex,nofollow' );
 868                 $out->setArticleRelated( false );
 869                 $out->enableClientCache( false );
 870                 $out->addWikiText( $description );
 871         }
 872
 873         /**
 874          * Callback for usort() to do link sorts by (namespace, title)
 875          * Function copied from Title::compare()
 876          *
 877          * @param $a object page to compare with
 878          * @param $b object page to compare with
 879          * @return Integer: result of string comparison, or namespace comparison
 880          */
 881         protected function compare( $a, $b ) {
 882                 if ( $a->page_namespace == $b->page_namespace ) {
 883                         return strcmp( $a->page_title, $b->page_title );
 884                 } else {
 885                         return $a->page_namespace - $b->page_namespace;
 886                 }
 887         }
 888
 889         /**
 890          * Returns the corresponding $wgImageLimits entry for the selected user option
 891          *
 892          * @param $user User
 893          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 894          * @return array
 895          * @since 1.21
 896          */
 897         public function getImageLimitsFromOption( $user, $optionName ) {
 898                 global $wgImageLimits;
 899
 900                 $option = $user->getIntOption( $optionName );
 901                 if ( !isset( $wgImageLimits[$option] ) ) {
 902                         $option = User::getDefaultOption( $optionName );
 903                 }
 904
 905                 // The user offset might still be incorrect, specially if
 906                 // $wgImageLimits got changed (see bug #8858).
 907                 if ( !isset( $wgImageLimits[$option] ) ) {
 908                         // Default to the first offset in $wgImageLimits
 909                         $option = 0;
 910                 }
 911
 912                 return isset( $wgImageLimits[$option] )
 913                         ? $wgImageLimits[$option]
 914                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
 915         }
 916 }
 917
 918 /**
 919  * Builds the image revision log shown on image pages
 920  *
 921  * @ingroup Media
 922  */
 923 class ImageHistoryList extends ContextSource {
 924
 925         /**
 926          * @var Title
 927          */
 928         protected $title;
 929
 930         /**
 931          * @var File
 932          */
 933         protected $img;
 934
 935         /**
 936          * @var ImagePage
 937          */
 938         protected $imagePage;
 939
 940         /**
 941          * @var File
 942          */
 943         protected $current;
 944
 945         protected $repo, $showThumb;
 946         protected $preventClickjacking = false;
 947
 948         /**
 949          * @param ImagePage $imagePage
 950          */
 951         public function __construct( $imagePage ) {
 952                 global $wgShowArchiveThumbnails;
 953                 $this->current = $imagePage->getFile();
 954                 $this->img = $imagePage->getDisplayedFile();
 955                 $this->title = $imagePage->getTitle();
 956                 $this->imagePage = $imagePage;
 957                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 958                 $this->setContext( $imagePage->getContext() );
 959         }
 960
 961         /**
 962          * @return ImagePage
 963          */
 964         public function getImagePage() {
 965                 return $this->imagePage;
 966         }
 967
 968         /**
 969          * @return File
 970          */
 971         public function getFile() {
 972                 return $this->img;
 973         }
 974
 975         /**
 976          * @param $navLinks string
 977          * @return string
 978          */
 979         public function beginImageHistoryList( $navLinks = '' ) {
 980                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() ) . "\n"
 981                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 982                         . $this->msg( 'filehist-help' )->parseAsBlock()
 983                         . $navLinks . "\n"
 984                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 985                         . '<tr><td></td>'
 986                         . ( $this->current->isLocal() && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 987                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
 988                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
 989                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
 990                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
 991                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
 992                         . "</tr>\n";
 993         }
 994
 995         /**
 996          * @param $navLinks string
 997          * @return string
 998          */
 999         public function endImageHistoryList( $navLinks = '' ) {
1000                 return "</table>\n$navLinks\n</div>\n";
1001         }
1002
1003         /**
1004          * @param $iscur
1005          * @param $file File
1006          * @return string
1007          */
1008         public function imageHistoryLine( $iscur, $file ) {
1009                 global $wgContLang;
1010
1011                 $user = $this->getUser();
1012                 $lang = $this->getLanguage();
1013                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1014                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1015                 $userId = $file->getUser( 'id' );
1016                 $userText = $file->getUser( 'text' );
1017                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1018
1019                 $local = $this->current->isLocal();
1020                 $row = $selected = '';
1021
1022                 // Deletion link
1023                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1024                         $row .= '<td>';
1025                         # Link to remove from history
1026                         if ( $user->isAllowed( 'delete' ) ) {
1027                                 $q = array( 'action' => 'delete' );
1028                                 if ( !$iscur ) {
1029                                         $q['oldimage'] = $img;
1030                                 }
1031                                 $row .= Linker::linkKnown(
1032                                         $this->title,
1033                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1034                                         array(), $q
1035                                 );
1036                         }
1037                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1038                         $canHide = $user->isAllowed( 'deleterevision' );
1039                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1040                                 if ( $user->isAllowed( 'delete' ) ) {
1041                                         $row .= '<br />';
1042                                 }
1043                                 // If file is top revision or locked from this user, don't link
1044                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1045                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1046                                 } else {
1047                                         list( $ts, ) = explode( '!', $img, 2 );
1048                                         $query = array(
1049                                                 'type' => 'oldimage',
1050                                                 'target' => $this->title->getPrefixedText(),
1051                                                 'ids' => $ts,
1052                                         );
1053                                         $del = Linker::revDeleteLink( $query,
1054                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1055                                 }
1056                                 $row .= $del;
1057                         }
1058                         $row .= '</td>';
1059                 }
1060
1061                 // Reversion link/current indicator
1062                 $row .= '<td>';
1063                 if ( $iscur ) {
1064                         $row .= $this->msg( 'filehist-current' )->escaped();
1065                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1066                         && $this->title->quickUserCan( 'upload', $user )
1067                 ) {
1068                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1069                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1070                         } else {
1071                                 $row .= Linker::linkKnown(
1072                                         $this->title,
1073                                         $this->msg( 'filehist-revert' )->escaped(),
1074                                         array(),
1075                                         array(
1076                                                 'action' => 'revert',
1077                                                 'oldimage' => $img,
1078                                                 'wpEditToken' => $user->getEditToken( $img )
1079                                         )
1080                                 );
1081                         }
1082                 }
1083                 $row .= '</td>';
1084
1085                 // Date/time and image link
1086                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1087                         $selected = "class='filehistory-selected'";
1088                 }
1089                 $row .= "<td $selected style='white-space: nowrap;'>";
1090                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1091                         # Don't link to unviewable files
1092                         $row .= '<span class="history-deleted">' . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1093                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1094                         if ( $local ) {
1095                                 $this->preventClickjacking();
1096                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1097                                 # Make a link to review the image
1098                                 $url = Linker::linkKnown(
1099                                         $revdel,
1100                                         $lang->userTimeAndDate( $timestamp, $user ),
1101                                         array(),
1102                                         array(
1103                                                 'target' => $this->title->getPrefixedText(),
1104                                                 'file' => $img,
1105                                                 'token' => $user->getEditToken( $img )
1106                                         )
1107                                 );
1108                         } else {
1109                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1110                         }
1111                         $row .= '<span class="history-deleted">' . $url . '</span>';
1112                 } else {
1113                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1114                         $row .= Xml::element( 'a', array( 'href' => $url ), $lang->userTimeAndDate( $timestamp, $user ) );
1115                 }
1116                 $row .= "</td>";
1117
1118                 // Thumbnail
1119                 if ( $this->showThumb ) {
1120                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1121                 }
1122
1123                 // Image dimensions + size
1124                 $row .= '<td>';
1125                 $row .= htmlspecialchars( $file->getDimensionsString() );
1126                 $row .= $this->msg( 'word-separator' )->plain();
1127                 $row .= '<span style="white-space: nowrap;">';
1128                 $row .= $this->msg( 'parentheses' )->rawParams( Linker::formatSize( $file->getSize() ) )->plain();
1129                 $row .= '</span>';
1130                 $row .= '</td>';
1131
1132                 // Uploading user
1133                 $row .= '<td>';
1134                 // Hide deleted usernames
1135                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1136                         $row .= '<span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1137                 } else {
1138                         if ( $local ) {
1139                                 $row .= Linker::userLink( $userId, $userText );
1140                                 $row .= $this->msg( 'word-separator' )->plain();
1141                                 $row .= '<span style="white-space: nowrap;">';
1142                                 $row .= Linker::userToolLinks( $userId, $userText );
1143                                 $row .= '</span>';
1144                         } else {
1145                                 $row .= htmlspecialchars( $userText );
1146                         }
1147                 }
1148                 $row .= '</td>';
1149
1150                 // Don't show deleted descriptions
1151                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1152                         $row .= '<td><span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1153                 } else {
1154                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1155                 }
1156
1157                 $rowClass = null;
1158                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1159                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1160
1161                 return "<tr{$classAttr}>{$row}</tr>\n";
1162         }
1163
1164         /**
1165          * @param $file File
1166          * @return string
1167          */
1168         protected function getThumbForLine( $file ) {
1169                 $lang = $this->getLanguage();
1170                 $user = $this->getUser();
1171                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1172                         && !$file->isDeleted( File::DELETED_FILE ) )
1173                 {
1174                         $params = array(
1175                                 'width' => '120',
1176                                 'height' => '120',
1177                         );
1178                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1179
1180                         $thumbnail = $file->transform( $params );
1181                         $options = array(
1182                                 'alt' => $this->msg( 'filehist-thumbtext',
1183                                         $lang->userTimeAndDate( $timestamp, $user ),
1184                                         $lang->userDate( $timestamp, $user ),
1185                                         $lang->userTime( $timestamp, $user ) )->text(),
1186                                 'file-link' => true,
1187                         );
1188
1189                         if ( !$thumbnail ) {
1190                                 return $this->msg( 'filehist-nothumb' )->escaped();
1191                         }
1192
1193                         return $thumbnail->toHtml( $options );
1194                 } else {
1195                         return $this->msg( 'filehist-nothumb' )->escaped();
1196                 }
1197         }
1198
1199         /**
1200          * @param $enable bool
1201          */
1202         protected function preventClickjacking( $enable = true ) {
1203                 $this->preventClickjacking = $enable;
1204         }
1205
1206         /**
1207          * @return bool
1208          */
1209         public function getPreventClickjacking() {
1210                 return $this->preventClickjacking;
1211         }
1212 }
1213
1214 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1215         protected $preventClickjacking = false;
1216
1217         /**
1218          * @var File
1219          */
1220         protected $mImg;
1221
1222         /**
1223          * @var Title
1224          */
1225         protected $mTitle;
1226
1227         /**
1228          * @param ImagePage $imagePage
1229          */
1230         function __construct( $imagePage ) {
1231                 parent::__construct( $imagePage->getContext() );
1232                 $this->mImagePage = $imagePage;
1233                 $this->mTitle = clone ( $imagePage->getTitle() );
1234                 $this->mTitle->setFragment( '#filehistory' );
1235                 $this->mImg = null;
1236                 $this->mHist = array();
1237                 $this->mRange = array( 0, 0 ); // display range
1238         }
1239
1240         /**
1241          * @return Title
1242          */
1243         function getTitle() {
1244                 return $this->mTitle;
1245         }
1246
1247         function getQueryInfo() {
1248                 return false;
1249         }
1250
1251         /**
1252          * @return string
1253          */
1254         function getIndexField() {
1255                 return '';
1256         }
1257
1258         /**
1259          * @param $row object
1260          * @return string
1261          */
1262         function formatRow( $row ) {
1263                 return '';
1264         }
1265
1266         /**
1267          * @return string
1268          */
1269         function getBody() {
1270                 $s = '';
1271                 $this->doQuery();
1272                 if ( count( $this->mHist ) ) {
1273                         $list = new ImageHistoryList( $this->mImagePage );
1274                         # Generate prev/next links
1275                         $navLink = $this->getNavigationBar();
1276                         $s = $list->beginImageHistoryList( $navLink );
1277                         // Skip rows there just for paging links
1278                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1279                                 $file = $this->mHist[$i];
1280                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1281                         }
1282                         $s .= $list->endImageHistoryList( $navLink );
1283
1284                         if ( $list->getPreventClickjacking() ) {
1285                                 $this->preventClickjacking();
1286                         }
1287                 }
1288                 return $s;
1289         }
1290
1291         function doQuery() {
1292                 if ( $this->mQueryDone ) {
1293                         return;
1294                 }
1295                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1296                 if ( !$this->mImg->exists() ) {
1297                         return;
1298                 }
1299                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1300                 if ( $this->mIsBackwards ) {
1301                         // Fetch the file history
1302                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1303                         // The current rev may not meet the offset/limit
1304                         $numRows = count( $this->mHist );
1305                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1306                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1307                         }
1308                 } else {
1309                         // The current rev may not meet the offset
1310                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1311                                 $this->mHist[] = $this->mImg;
1312                         }
1313                         // Old image versions (fetch extra row for nav links)
1314                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1315                         // Fetch the file history
1316                         $this->mHist = array_merge( $this->mHist,
1317                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1318                 }
1319                 $numRows = count( $this->mHist ); // Total number of query results
1320                 if ( $numRows ) {
1321                         # Index value of top item in the list
1322                         $firstIndex = $this->mIsBackwards ?
1323                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1324                         # Discard the extra result row if there is one
1325                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1326                                 if ( $this->mIsBackwards ) {
1327                                         # Index value of item past the index
1328                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1329                                         # Index value of bottom item in the list
1330                                         $lastIndex = $this->mHist[1]->getTimestamp();
1331                                         # Display range
1332                                         $this->mRange = array( 1, $numRows - 1 );
1333                                 } else {
1334                                         # Index value of item past the index
1335                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1336                                         # Index value of bottom item in the list
1337                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1338                                         # Display range
1339                                         $this->mRange = array( 0, $numRows - 2 );
1340                                 }
1341                         } else {
1342                                 # Setting indexes to an empty string means that they will be
1343                                 # omitted if they would otherwise appear in URLs. It just so
1344                                 # happens that this  is the right thing to do in the standard
1345                                 # UI, in all the relevant cases.
1346                                 $this->mPastTheEndIndex = '';
1347                                 # Index value of bottom item in the list
1348                                 $lastIndex = $this->mIsBackwards ?
1349                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1350                                 # Display range
1351                                 $this->mRange = array( 0, $numRows - 1 );
1352                         }
1353                 } else {
1354                         $firstIndex = '';
1355                         $lastIndex = '';
1356                         $this->mPastTheEndIndex = '';
1357                 }
1358                 if ( $this->mIsBackwards ) {
1359                         $this->mIsFirst = ( $numRows < $queryLimit );
1360                         $this->mIsLast = ( $this->mOffset == '' );
1361                         $this->mLastShown = $firstIndex;
1362                         $this->mFirstShown = $lastIndex;
1363                 } else {
1364                         $this->mIsFirst = ( $this->mOffset == '' );
1365                         $this->mIsLast = ( $numRows < $queryLimit );
1366                         $this->mLastShown = $lastIndex;
1367                         $this->mFirstShown = $firstIndex;
1368                 }
1369                 $this->mQueryDone = true;
1370         }
1371
1372         /**
1373          * @param $enable bool
1374          */
1375         protected function preventClickjacking( $enable = true ) {
1376                 $this->preventClickjacking = $enable;
1377         }
1378
1379         /**
1380          * @return bool
1381          */
1382         public function getPreventClickjacking() {
1383                 return $this->preventClickjacking;
1384         }
1385
1386 }