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
 315                         $renderLang = $request->getVal( 'lang' );
 316                         if ( !is_null( $renderLang ) ) {
 317                                 $params['lang'] = $renderLang;
 318                         }
 319
 320                         $width_orig = $this->displayImg->getWidth( $page );
 321                         $width = $width_orig;
 322                         $height_orig = $this->displayImg->getHeight( $page );
 323                         $height = $height_orig;
 324
 325                         $filename = wfEscapeWikiText( $this->displayImg->getName() );
 326                         $linktext = $filename;
 327
 328                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 329
 330                         if ( $this->displayImg->allowInlineDisplay() ) {
 331                                 # image
 332
 333                                 # "Download high res version" link below the image
 334                                 # $msgsize = wfMessage( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 335                                 # We'll show a thumbnail of this image
 336                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 337                                         # Calculate the thumbnail size.
 338                                         # First case, the limiting factor is the width, not the height.
 339                                         if ( $width / $height >= $maxWidth / $maxHeight ) { // FIXME: Possible division by 0. bug 36911
 340                                                 $height = round( $height * $maxWidth / $width ); // FIXME: Possible division by 0. bug 36911
 341                                                 $width = $maxWidth;
 342                                                 # Note that $height <= $maxHeight now.
 343                                         } else {
 344                                                 $newwidth = floor( $width * $maxHeight / $height ); // FIXME: Possible division by 0. bug 36911
 345                                                 $height = round( $height * $newwidth / $width ); // FIXME: Possible division by 0. bug 36911
 346                                                 $width = $newwidth;
 347                                                 # Note that $height <= $maxHeight now, but might not be identical
 348                                                 # because of rounding.
 349                                         }
 350                                         $linktext = wfMessage( 'show-big-image' )->escaped();
 351                                         if ( $this->displayImg->getRepo()->canTransformVia404() ) {
 352                                                 $thumbSizes = $wgImageLimits;
 353                                         } else {
 354                                                 # Creating thumb links triggers thumbnail generation.
 355                                                 # Just generate the thumb for the current users prefs.
 356                                                 $thumbSizes = array( $this->getImageLimitsFromOption( $user, 'thumbsize' ) );
 357                                         }
 358                                         # Generate thumbnails or thumbnail links as needed...
 359                                         $otherSizes = array();
 360                                         foreach ( $thumbSizes as $size ) {
 361                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig
 362                                                         && $size[0] != $width && $size[1] != $height )
 363                                                 {
 364                                                         $sizeLink = $this->makeSizeLink( $params, $size[0], $size[1] );
 365                                                         if ( $sizeLink ) {
 366                                                                 $otherSizes[] = $sizeLink;
 367                                                         }
 368                                                 }
 369                                         }
 370                                         $msgsmall = '';
 371                                         $sizeLinkBigImagePreview = $this->makeSizeLink( $params, $width, $height );
 372                                         if ( $sizeLinkBigImagePreview ) {
 373                                                 $msgsmall .= wfMessage( 'show-big-image-preview' )->
 374                                                         rawParams( $sizeLinkBigImagePreview )->
 375                                                         parse();
 376                                         }
 377                                         if ( count( $otherSizes ) ) {
 378                                                 $msgsmall .= ' ' .
 379                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 380                                                         wfMessage( 'show-big-image-other' )->rawParams( $lang->pipeList( $otherSizes ) )->
 381                                                         params( count( $otherSizes ) )->parse()
 382                                                 );
 383                                         }
 384                                 } elseif ( $width == 0 && $height == 0 ) {
 385                                         # Some sort of audio file that doesn't have dimensions
 386                                         # Don't output a no hi res message for such a file
 387                                         $msgsmall = '';
 388                                 } elseif ( $this->displayImg->isVectorized() ) {
 389                                         # For vectorized images, full size is just the frame size
 390                                         $msgsmall = '';
 391                                 } else {
 392                                         # Image is small enough to show full size on image page
 393                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 394                                 }
 395
 396                                 $params['width'] = $width;
 397                                 $params['height'] = $height;
 398                                 $thumbnail = $this->displayImg->transform( $params );
 399
 400                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 401
 402                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 403                                 if ( $isMulti ) {
 404                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 405                                 }
 406
 407                                 if ( $thumbnail ) {
 408                                         $options = array(
 409                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 410                                                 'file-link' => true,
 411                                         );
 412                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 413                                                 $thumbnail->toHtml( $options ) .
 414                                                 $anchorclose . "</div>\n" );
 415                                 }
 416
 417                                 if ( $isMulti ) {
 418                                         $count = $this->displayImg->pageCount();
 419
 420                                         if ( $page > 1 ) {
 421                                                 $label = $out->parse( wfMessage( 'imgmultipageprev' )->text(), false );
 422                                                 $link = Linker::linkKnown(
 423                                                         $this->getTitle(),
 424                                                         $label,
 425                                                         array(),
 426                                                         array( 'page' => $page - 1 )
 427                                                 );
 428                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 429                                                         array( 'page' => $page - 1 ) );
 430                                         } else {
 431                                                 $thumb1 = '';
 432                                         }
 433
 434                                         if ( $page < $count ) {
 435                                                 $label = wfMessage( 'imgmultipagenext' )->text();
 436                                                 $link = Linker::linkKnown(
 437                                                         $this->getTitle(),
 438                                                         $label,
 439                                                         array(),
 440                                                         array( 'page' => $page + 1 )
 441                                                 );
 442                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 443                                                         array( 'page' => $page + 1 ) );
 444                                         } else {
 445                                                 $thumb2 = '';
 446                                         }
 447
 448                                         global $wgScript;
 449
 450                                         $formParams = array(
 451                                                 'name' => 'pageselector',
 452                                                 'action' => $wgScript,
 453                                                 'onchange' => 'document.pageselector.submit();',
 454                                         );
 455                                         $options = array();
 456                                         for ( $i = 1; $i <= $count; $i++ ) {
 457                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 458                                         }
 459                                         $select = Xml::tags( 'select',
 460                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 461                                                 implode( "\n", $options ) );
 462
 463                                         $out->addHTML(
 464                                                 '</td><td><div class="multipageimagenavbox">' .
 465                                                 Xml::openElement( 'form', $formParams ) .
 466                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 467                                                         wfMessage( 'imgmultigoto' )->rawParams( $select )->parse() .
 468                                                 Xml::submitButton( wfMessage( 'imgmultigo' )->text() ) .
 469                                                 Xml::closeElement( 'form' ) .
 470                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 471                                         );
 472                                 }
 473                         } elseif ( $this->displayImg->isSafeFile() ) {
 474                                 # if direct link is allowed but it's not a renderable image, show an icon.
 475                                 $icon = $this->displayImg->iconThumb();
 476
 477                                 $out->addHTML( '<div class="fullImageLink" id="file">' .
 478                                         $icon->toHtml( array( 'file-link' => true ) ) .
 479                                         "</div>\n" );
 480                         }
 481
 482                         $longDesc = wfMessage( 'parentheses', $this->displayImg->getLongDesc() )->text();
 483
 484                         $medialink = "[[Media:$filename|$linktext]]";
 485
 486                         if ( !$this->displayImg->isSafeFile() ) {
 487                                 $warning = wfMessage( 'mediawarning' )->plain();
 488                                 // dirmark is needed here to separate the file name, which
 489                                 // most likely ends in Latin characters, from the description,
 490                                 // which may begin with the file type. In RTL environment
 491                                 // this will get messy.
 492                                 // The dirmark, however, must not be immediately adjacent
 493                                 // to the filename, because it can get copied with it.
 494                                 // See bug 25277.
 495                                 $out->addWikiText( <<<EOT
 496 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 497 <div class="mediaWarning">$warning</div>
 498 EOT
 499                                         );
 500                         } else {
 501                                 $out->addWikiText( <<<EOT
 502 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 503 </div>
 504 EOT
 505                                 );
 506                         }
 507
 508                         // Add cannot animate thumbnail warning
 509                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 510                                 // Include the extension so wiki admins can
 511                                 // customize it on a per file-type basis
 512                                 // (aka say things like use format X instead).
 513                                 // additionally have a specific message for
 514                                 // file-no-thumb-animation-gif
 515                                 $ext = $this->displayImg->getExtension();
 516                                 $noAnimMesg = wfMessageFallback(
 517                                         'file-no-thumb-animation-' . $ext,
 518                                         'file-no-thumb-animation'
 519                                 )->plain();
 520
 521                                 $out->addWikiText( <<<EOT
 522 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 523 EOT
 524                                 );
 525                         }
 526
 527                         if ( !$this->displayImg->isLocal() ) {
 528                                 $this->printSharedImageText();
 529                         }
 530                 } else {
 531                         # Image does not exist
 532                         if ( !$this->getID() ) {
 533                                 # No article exists either
 534                                 # Show deletion log to be consistent with normal articles
 535                                 LogEventsList::showLogExtract(
 536                                         $out,
 537                                         array( 'delete', 'move' ),
 538                                         $this->getTitle()->getPrefixedText(),
 539                                         '',
 540                                         array( 'lim' => 10,
 541                                                 'conds' => array( "log_action != 'revision'" ),
 542                                                 'showIfEmpty' => false,
 543                                                 'msgKey' => array( 'moveddeleted-notice' )
 544                                         )
 545                                 );
 546                         }
 547
 548                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 549                                 // Only show an upload link if the user can upload
 550                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 551                                 $nofile = array(
 552                                         'filepage-nofile-link',
 553                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 554                                 );
 555                         } else {
 556                                 $nofile = 'filepage-nofile';
 557                         }
 558                         // Note, if there is an image description page, but
 559                         // no image, then this setRobotPolicy is overridden
 560                         // by Article::View().
 561                         $out->setRobotPolicy( 'noindex,nofollow' );
 562                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 563                         if ( !$this->getID() && $wgSend404Code ) {
 564                                 // If there is no image, no shared image, and no description page,
 565                                 // output a 404, to be consistent with articles.
 566                                 $request->response()->header( 'HTTP/1.1 404 Not Found' );
 567                         }
 568                 }
 569                 $out->setFileVersion( $this->displayImg );
 570         }
 571
 572         /**
 573          * Creates an thumbnail of specified size and returns an HTML link to it
 574          * @param array $params Scaler parameters
 575          * @param $width int
 576          * @param $height int
 577          * @return string
 578          */
 579         private function makeSizeLink( $params, $width, $height ) {
 580                 $params['width'] = $width;
 581                 $params['height'] = $height;
 582                 $thumbnail = $this->displayImg->transform( $params );
 583                 if ( $thumbnail && !$thumbnail->isError() ) {
 584                         return Html::rawElement( 'a', array(
 585                                 'href' => $thumbnail->getUrl(),
 586                                 'class' => 'mw-thumbnail-link'
 587                                 ), wfMessage( 'show-big-image-size' )->numParams(
 588                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 589                                 )->parse() );
 590                 } else {
 591                         return '';
 592                 }
 593         }
 594
 595         /**
 596          * Show a notice that the file is from a shared repository
 597          */
 598         protected function printSharedImageText() {
 599                 $out = $this->getContext()->getOutput();
 600                 $this->loadFile();
 601
 602                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 603                 $descText = $this->mPage->getFile()->getDescriptionText();
 604
 605                 /* Add canonical to head if there is no local page for this shared file */
 606                 if ( $descUrl && $this->mPage->getID() == 0 ) {
 607                         $out->setCanonicalUrl( $descUrl );
 608                 }
 609
 610                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 611                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 612
 613                 if ( $descUrl && $descText && wfMessage( 'sharedupload-desc-here' )->plain() !== '-' ) {
 614                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 615                 } elseif ( $descUrl && wfMessage( 'sharedupload-desc-there' )->plain() !== '-' ) {
 616                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 617                 } else {
 618                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 619                 }
 620
 621                 if ( $descText ) {
 622                         $this->mExtraDescription = $descText;
 623                 }
 624         }
 625
 626         public function getUploadUrl() {
 627                 $this->loadFile();
 628                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 629                 return $uploadTitle->getFullURL( array(
 630                         'wpDestFile' => $this->mPage->getFile()->getName(),
 631                         'wpForReUpload' => 1
 632                 ) );
 633         }
 634
 635         /**
 636          * Print out the various links at the bottom of the image page, e.g. reupload,
 637          * external editing (and instructions link) etc.
 638          */
 639         protected function uploadLinksBox() {
 640                 global $wgEnableUploads;
 641
 642                 if ( !$wgEnableUploads ) {
 643                         return;
 644                 }
 645
 646                 $this->loadFile();
 647                 if ( !$this->mPage->getFile()->isLocal() ) {
 648                         return;
 649                 }
 650
 651                 $out = $this->getContext()->getOutput();
 652                 $out->addHTML( "<ul>\n" );
 653
 654                 # "Upload a new version of this file" link
 655                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 656                 if ( $canUpload && UploadBase::userCanReUpload( $this->getContext()->getUser(), $this->mPage->getFile()->name ) ) {
 657                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMessage( 'uploadnewversion-linktext' )->text() );
 658                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 659                 } else {
 660                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">" . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 661                 }
 662
 663                 $out->addHTML( "</ul>\n" );
 664         }
 665
 666         protected function closeShowImage() { } # For overloading
 667
 668         /**
 669          * If the page we've just displayed is in the "Image" namespace,
 670          * we follow it with an upload history of the image and its usage.
 671          */
 672         protected function imageHistory() {
 673                 $this->loadFile();
 674                 $out = $this->getContext()->getOutput();
 675                 $pager = new ImageHistoryPseudoPager( $this );
 676                 $out->addHTML( $pager->getBody() );
 677                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 678
 679                 $this->mPage->getFile()->resetHistory(); // free db resources
 680
 681                 # Exist check because we don't want to show this on pages where an image
 682                 # doesn't exist along with the noimage message, that would suck. -ævar
 683                 if ( $this->mPage->getFile()->exists() ) {
 684                         $this->uploadLinksBox();
 685                 }
 686         }
 687
 688         /**
 689          * @param $target
 690          * @param $limit
 691          * @return ResultWrapper
 692          */
 693         protected function queryImageLinks( $target, $limit ) {
 694                 $dbr = wfGetDB( DB_SLAVE );
 695
 696                 return $dbr->select(
 697                         array( 'imagelinks', 'page' ),
 698                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 699                         array( 'il_to' => $target, 'il_from = page_id' ),
 700                         __METHOD__,
 701                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 702                 );
 703         }
 704
 705         protected function imageLinks() {
 706                 $limit = 100;
 707
 708                 $out = $this->getContext()->getOutput();
 709                 $res = $this->queryImageLinks( $this->getTitle()->getDBkey(), $limit + 1 );
 710                 $rows = array();
 711                 $redirects = array();
 712                 foreach ( $res as $row ) {
 713                         if ( $row->page_is_redirect ) {
 714                                 $redirects[$row->page_title] = array();
 715                         }
 716                         $rows[] = $row;
 717                 }
 718                 $count = count( $rows );
 719
 720                 $hasMore = $count > $limit;
 721                 if ( !$hasMore && count( $redirects ) ) {
 722                         $res = $this->queryImageLinks( array_keys( $redirects ),
 723                                 $limit - count( $rows ) + 1 );
 724                         foreach ( $res as $row ) {
 725                                 $redirects[$row->il_to][] = $row;
 726                                 $count++;
 727                         }
 728                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 729                 }
 730
 731                 if ( $count == 0 ) {
 732                         $out->wrapWikiMsg(
 733                                 Html::rawElement( 'div',
 734                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 735                                 'nolinkstoimage'
 736                         );
 737                         return;
 738                 }
 739
 740                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 741                 if ( !$hasMore ) {
 742                         $out->addWikiMsg( 'linkstoimage', $count );
 743                 } else {
 744                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 745                         $out->addWikiMsg( 'linkstoimage-more',
 746                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 747                                 $this->getTitle()->getPrefixedDBkey()
 748                         );
 749                 }
 750
 751                 $out->addHTML(
 752                         Html::openElement( 'ul',
 753                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 754                 );
 755                 $count = 0;
 756
 757                 // Sort the list by namespace:title
 758                 usort( $rows, array( $this, 'compare' ) );
 759
 760                 // Create links for every element
 761                 $currentCount = 0;
 762                 foreach ( $rows as $element ) {
 763                         $currentCount++;
 764                         if ( $currentCount > $limit ) {
 765                                 break;
 766                         }
 767
 768                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 769                         if ( !isset( $redirects[$element->page_title] ) ) {
 770                                 # No redirects
 771                                 $liContents = $link;
 772                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 773                                 # Redirect without usages
 774                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 775                         } else {
 776                                 # Redirect with usages
 777                                 $li = '';
 778                                 foreach ( $redirects[$element->page_title] as $row ) {
 779                                         $currentCount++;
 780                                         if ( $currentCount > $limit ) {
 781                                                 break;
 782                                         }
 783
 784                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 785                                         $li .= Html::rawElement(
 786                                                 'li',
 787                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 788                                                 $link2
 789                                                 ) . "\n";
 790                                 }
 791
 792                                 $ul = Html::rawElement(
 793                                         'ul',
 794                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 795                                         $li
 796                                         ) . "\n";
 797                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 798                                         $link, $ul )->parse();
 799                         }
 800                         $out->addHTML( Html::rawElement(
 801                                         'li',
 802                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 803                                         $liContents
 804                                 ) . "\n"
 805                         );
 806
 807                 };
 808                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 809                 $res->free();
 810
 811                 // Add a links to [[Special:Whatlinkshere]]
 812                 if ( $count > $limit ) {
 813                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 814                 }
 815                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 816         }
 817
 818         protected function imageDupes() {
 819                 $this->loadFile();
 820                 $out = $this->getContext()->getOutput();
 821
 822                 $dupes = $this->mPage->getDuplicates();
 823                 if ( count( $dupes ) == 0 ) {
 824                         return;
 825                 }
 826
 827                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 828                 $out->addWikiMsg( 'duplicatesoffile',
 829                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 830                 );
 831                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 832
 833                 /**
 834                  * @var $file File
 835                  */
 836                 foreach ( $dupes as $file ) {
 837                         $fromSrc = '';
 838                         if ( $file->isLocal() ) {
 839                                 $link = Linker::linkKnown( $file->getTitle() );
 840                         } else {
 841                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 842                                         $file->getTitle()->getPrefixedText() );
 843                                 $fromSrc = wfMessage( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 844                         }
 845                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 846                 }
 847                 $out->addHTML( "</ul></div>\n" );
 848         }
 849
 850         /**
 851          * Delete the file, or an earlier version of it
 852          */
 853         public function delete() {
 854                 $file = $this->mPage->getFile();
 855                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 856                         // Standard article deletion
 857                         parent::delete();
 858                         return;
 859                 }
 860
 861                 $deleter = new FileDeleteForm( $file );
 862                 $deleter->execute();
 863         }
 864
 865         /**
 866          * Display an error with a wikitext description
 867          *
 868          * @param $description String
 869          */
 870         function showError( $description ) {
 871                 $out = $this->getContext()->getOutput();
 872                 $out->setPageTitle( wfMessage( 'internalerror' ) );
 873                 $out->setRobotPolicy( 'noindex,nofollow' );
 874                 $out->setArticleRelated( false );
 875                 $out->enableClientCache( false );
 876                 $out->addWikiText( $description );
 877         }
 878
 879         /**
 880          * Callback for usort() to do link sorts by (namespace, title)
 881          * Function copied from Title::compare()
 882          *
 883          * @param $a object page to compare with
 884          * @param $b object page to compare with
 885          * @return Integer: result of string comparison, or namespace comparison
 886          */
 887         protected function compare( $a, $b ) {
 888                 if ( $a->page_namespace == $b->page_namespace ) {
 889                         return strcmp( $a->page_title, $b->page_title );
 890                 } else {
 891                         return $a->page_namespace - $b->page_namespace;
 892                 }
 893         }
 894
 895         /**
 896          * Returns the corresponding $wgImageLimits entry for the selected user option
 897          *
 898          * @param $user User
 899          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 900          * @return array
 901          * @since 1.21
 902          */
 903         public function getImageLimitsFromOption( $user, $optionName ) {
 904                 global $wgImageLimits;
 905
 906                 $option = $user->getIntOption( $optionName );
 907                 if ( !isset( $wgImageLimits[$option] ) ) {
 908                         $option = User::getDefaultOption( $optionName );
 909                 }
 910
 911                 // The user offset might still be incorrect, specially if
 912                 // $wgImageLimits got changed (see bug #8858).
 913                 if ( !isset( $wgImageLimits[$option] ) ) {
 914                         // Default to the first offset in $wgImageLimits
 915                         $option = 0;
 916                 }
 917
 918                 return isset( $wgImageLimits[$option] )
 919                         ? $wgImageLimits[$option]
 920                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
 921         }
 922 }
 923
 924 /**
 925  * Builds the image revision log shown on image pages
 926  *
 927  * @ingroup Media
 928  */
 929 class ImageHistoryList extends ContextSource {
 930
 931         /**
 932          * @var Title
 933          */
 934         protected $title;
 935
 936         /**
 937          * @var File
 938          */
 939         protected $img;
 940
 941         /**
 942          * @var ImagePage
 943          */
 944         protected $imagePage;
 945
 946         /**
 947          * @var File
 948          */
 949         protected $current;
 950
 951         protected $repo, $showThumb;
 952         protected $preventClickjacking = false;
 953
 954         /**
 955          * @param ImagePage $imagePage
 956          */
 957         public function __construct( $imagePage ) {
 958                 global $wgShowArchiveThumbnails;
 959                 $this->current = $imagePage->getFile();
 960                 $this->img = $imagePage->getDisplayedFile();
 961                 $this->title = $imagePage->getTitle();
 962                 $this->imagePage = $imagePage;
 963                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 964                 $this->setContext( $imagePage->getContext() );
 965         }
 966
 967         /**
 968          * @return ImagePage
 969          */
 970         public function getImagePage() {
 971                 return $this->imagePage;
 972         }
 973
 974         /**
 975          * @return File
 976          */
 977         public function getFile() {
 978                 return $this->img;
 979         }
 980
 981         /**
 982          * @param $navLinks string
 983          * @return string
 984          */
 985         public function beginImageHistoryList( $navLinks = '' ) {
 986                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() ) . "\n"
 987                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 988                         . $this->msg( 'filehist-help' )->parseAsBlock()
 989                         . $navLinks . "\n"
 990                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 991                         . '<tr><td></td>'
 992                         . ( $this->current->isLocal() && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
 993                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
 994                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
 995                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
 996                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
 997                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
 998                         . "</tr>\n";
 999         }
1000
1001         /**
1002          * @param $navLinks string
1003          * @return string
1004          */
1005         public function endImageHistoryList( $navLinks = '' ) {
1006                 return "</table>\n$navLinks\n</div>\n";
1007         }
1008
1009         /**
1010          * @param $iscur
1011          * @param $file File
1012          * @return string
1013          */
1014         public function imageHistoryLine( $iscur, $file ) {
1015                 global $wgContLang;
1016
1017                 $user = $this->getUser();
1018                 $lang = $this->getLanguage();
1019                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1020                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1021                 $userId = $file->getUser( 'id' );
1022                 $userText = $file->getUser( 'text' );
1023                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1024
1025                 $local = $this->current->isLocal();
1026                 $row = $selected = '';
1027
1028                 // Deletion link
1029                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1030                         $row .= '<td>';
1031                         # Link to remove from history
1032                         if ( $user->isAllowed( 'delete' ) ) {
1033                                 $q = array( 'action' => 'delete' );
1034                                 if ( !$iscur ) {
1035                                         $q['oldimage'] = $img;
1036                                 }
1037                                 $row .= Linker::linkKnown(
1038                                         $this->title,
1039                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1040                                         array(), $q
1041                                 );
1042                         }
1043                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1044                         $canHide = $user->isAllowed( 'deleterevision' );
1045                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1046                                 if ( $user->isAllowed( 'delete' ) ) {
1047                                         $row .= '<br />';
1048                                 }
1049                                 // If file is top revision or locked from this user, don't link
1050                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1051                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1052                                 } else {
1053                                         list( $ts, ) = explode( '!', $img, 2 );
1054                                         $query = array(
1055                                                 'type' => 'oldimage',
1056                                                 'target' => $this->title->getPrefixedText(),
1057                                                 'ids' => $ts,
1058                                         );
1059                                         $del = Linker::revDeleteLink( $query,
1060                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1061                                 }
1062                                 $row .= $del;
1063                         }
1064                         $row .= '</td>';
1065                 }
1066
1067                 // Reversion link/current indicator
1068                 $row .= '<td>';
1069                 if ( $iscur ) {
1070                         $row .= $this->msg( 'filehist-current' )->escaped();
1071                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1072                         && $this->title->quickUserCan( 'upload', $user )
1073                 ) {
1074                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1075                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1076                         } else {
1077                                 $row .= Linker::linkKnown(
1078                                         $this->title,
1079                                         $this->msg( 'filehist-revert' )->escaped(),
1080                                         array(),
1081                                         array(
1082                                                 'action' => 'revert',
1083                                                 'oldimage' => $img,
1084                                                 'wpEditToken' => $user->getEditToken( $img )
1085                                         )
1086                                 );
1087                         }
1088                 }
1089                 $row .= '</td>';
1090
1091                 // Date/time and image link
1092                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1093                         $selected = "class='filehistory-selected'";
1094                 }
1095                 $row .= "<td $selected style='white-space: nowrap;'>";
1096                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1097                         # Don't link to unviewable files
1098                         $row .= '<span class="history-deleted">' . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1099                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1100                         if ( $local ) {
1101                                 $this->preventClickjacking();
1102                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1103                                 # Make a link to review the image
1104                                 $url = Linker::linkKnown(
1105                                         $revdel,
1106                                         $lang->userTimeAndDate( $timestamp, $user ),
1107                                         array(),
1108                                         array(
1109                                                 'target' => $this->title->getPrefixedText(),
1110                                                 'file' => $img,
1111                                                 'token' => $user->getEditToken( $img )
1112                                         )
1113                                 );
1114                         } else {
1115                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1116                         }
1117                         $row .= '<span class="history-deleted">' . $url . '</span>';
1118                 } else {
1119                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1120                         $row .= Xml::element( 'a', array( 'href' => $url ), $lang->userTimeAndDate( $timestamp, $user ) );
1121                 }
1122                 $row .= "</td>";
1123
1124                 // Thumbnail
1125                 if ( $this->showThumb ) {
1126                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1127                 }
1128
1129                 // Image dimensions + size
1130                 $row .= '<td>';
1131                 $row .= htmlspecialchars( $file->getDimensionsString() );
1132                 $row .= $this->msg( 'word-separator' )->plain();
1133                 $row .= '<span style="white-space: nowrap;">';
1134                 $row .= $this->msg( 'parentheses' )->rawParams( Linker::formatSize( $file->getSize() ) )->plain();
1135                 $row .= '</span>';
1136                 $row .= '</td>';
1137
1138                 // Uploading user
1139                 $row .= '<td>';
1140                 // Hide deleted usernames
1141                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1142                         $row .= '<span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1143                 } else {
1144                         if ( $local ) {
1145                                 $row .= Linker::userLink( $userId, $userText );
1146                                 $row .= $this->msg( 'word-separator' )->plain();
1147                                 $row .= '<span style="white-space: nowrap;">';
1148                                 $row .= Linker::userToolLinks( $userId, $userText );
1149                                 $row .= '</span>';
1150                         } else {
1151                                 $row .= htmlspecialchars( $userText );
1152                         }
1153                 }
1154                 $row .= '</td>';
1155
1156                 // Don't show deleted descriptions
1157                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1158                         $row .= '<td><span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1159                 } else {
1160                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1161                 }
1162
1163                 $rowClass = null;
1164                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1165                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1166
1167                 return "<tr{$classAttr}>{$row}</tr>\n";
1168         }
1169
1170         /**
1171          * @param $file File
1172          * @return string
1173          */
1174         protected function getThumbForLine( $file ) {
1175                 $lang = $this->getLanguage();
1176                 $user = $this->getUser();
1177                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1178                         && !$file->isDeleted( File::DELETED_FILE ) )
1179                 {
1180                         $params = array(
1181                                 'width' => '120',
1182                                 'height' => '120',
1183                         );
1184                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1185
1186                         $thumbnail = $file->transform( $params );
1187                         $options = array(
1188                                 'alt' => $this->msg( 'filehist-thumbtext',
1189                                         $lang->userTimeAndDate( $timestamp, $user ),
1190                                         $lang->userDate( $timestamp, $user ),
1191                                         $lang->userTime( $timestamp, $user ) )->text(),
1192                                 'file-link' => true,
1193                         );
1194
1195                         if ( !$thumbnail ) {
1196                                 return $this->msg( 'filehist-nothumb' )->escaped();
1197                         }
1198
1199                         return $thumbnail->toHtml( $options );
1200                 } else {
1201                         return $this->msg( 'filehist-nothumb' )->escaped();
1202                 }
1203         }
1204
1205         /**
1206          * @param $enable bool
1207          */
1208         protected function preventClickjacking( $enable = true ) {
1209                 $this->preventClickjacking = $enable;
1210         }
1211
1212         /**
1213          * @return bool
1214          */
1215         public function getPreventClickjacking() {
1216                 return $this->preventClickjacking;
1217         }
1218 }
1219
1220 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1221         protected $preventClickjacking = false;
1222
1223         /**
1224          * @var File
1225          */
1226         protected $mImg;
1227
1228         /**
1229          * @var Title
1230          */
1231         protected $mTitle;
1232
1233         /**
1234          * @param ImagePage $imagePage
1235          */
1236         function __construct( $imagePage ) {
1237                 parent::__construct( $imagePage->getContext() );
1238                 $this->mImagePage = $imagePage;
1239                 $this->mTitle = clone ( $imagePage->getTitle() );
1240                 $this->mTitle->setFragment( '#filehistory' );
1241                 $this->mImg = null;
1242                 $this->mHist = array();
1243                 $this->mRange = array( 0, 0 ); // display range
1244         }
1245
1246         /**
1247          * @return Title
1248          */
1249         function getTitle() {
1250                 return $this->mTitle;
1251         }
1252
1253         function getQueryInfo() {
1254                 return false;
1255         }
1256
1257         /**
1258          * @return string
1259          */
1260         function getIndexField() {
1261                 return '';
1262         }
1263
1264         /**
1265          * @param $row object
1266          * @return string
1267          */
1268         function formatRow( $row ) {
1269                 return '';
1270         }
1271
1272         /**
1273          * @return string
1274          */
1275         function getBody() {
1276                 $s = '';
1277                 $this->doQuery();
1278                 if ( count( $this->mHist ) ) {
1279                         $list = new ImageHistoryList( $this->mImagePage );
1280                         # Generate prev/next links
1281                         $navLink = $this->getNavigationBar();
1282                         $s = $list->beginImageHistoryList( $navLink );
1283                         // Skip rows there just for paging links
1284                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1285                                 $file = $this->mHist[$i];
1286                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1287                         }
1288                         $s .= $list->endImageHistoryList( $navLink );
1289
1290                         if ( $list->getPreventClickjacking() ) {
1291                                 $this->preventClickjacking();
1292                         }
1293                 }
1294                 return $s;
1295         }
1296
1297         function doQuery() {
1298                 if ( $this->mQueryDone ) {
1299                         return;
1300                 }
1301                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1302                 if ( !$this->mImg->exists() ) {
1303                         return;
1304                 }
1305                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1306                 if ( $this->mIsBackwards ) {
1307                         // Fetch the file history
1308                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1309                         // The current rev may not meet the offset/limit
1310                         $numRows = count( $this->mHist );
1311                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1312                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1313                         }
1314                 } else {
1315                         // The current rev may not meet the offset
1316                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1317                                 $this->mHist[] = $this->mImg;
1318                         }
1319                         // Old image versions (fetch extra row for nav links)
1320                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1321                         // Fetch the file history
1322                         $this->mHist = array_merge( $this->mHist,
1323                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1324                 }
1325                 $numRows = count( $this->mHist ); // Total number of query results
1326                 if ( $numRows ) {
1327                         # Index value of top item in the list
1328                         $firstIndex = $this->mIsBackwards ?
1329                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1330                         # Discard the extra result row if there is one
1331                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1332                                 if ( $this->mIsBackwards ) {
1333                                         # Index value of item past the index
1334                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1335                                         # Index value of bottom item in the list
1336                                         $lastIndex = $this->mHist[1]->getTimestamp();
1337                                         # Display range
1338                                         $this->mRange = array( 1, $numRows - 1 );
1339                                 } else {
1340                                         # Index value of item past the index
1341                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1342                                         # Index value of bottom item in the list
1343                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1344                                         # Display range
1345                                         $this->mRange = array( 0, $numRows - 2 );
1346                                 }
1347                         } else {
1348                                 # Setting indexes to an empty string means that they will be
1349                                 # omitted if they would otherwise appear in URLs. It just so
1350                                 # happens that this  is the right thing to do in the standard
1351                                 # UI, in all the relevant cases.
1352                                 $this->mPastTheEndIndex = '';
1353                                 # Index value of bottom item in the list
1354                                 $lastIndex = $this->mIsBackwards ?
1355                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1356                                 # Display range
1357                                 $this->mRange = array( 0, $numRows - 1 );
1358                         }
1359                 } else {
1360                         $firstIndex = '';
1361                         $lastIndex = '';
1362                         $this->mPastTheEndIndex = '';
1363                 }
1364                 if ( $this->mIsBackwards ) {
1365                         $this->mIsFirst = ( $numRows < $queryLimit );
1366                         $this->mIsLast = ( $this->mOffset == '' );
1367                         $this->mLastShown = $firstIndex;
1368                         $this->mFirstShown = $lastIndex;
1369                 } else {
1370                         $this->mIsFirst = ( $this->mOffset == '' );
1371                         $this->mIsLast = ( $numRows < $queryLimit );
1372                         $this->mLastShown = $lastIndex;
1373                         $this->mFirstShown = $firstIndex;
1374                 }
1375                 $this->mQueryDone = true;
1376         }
1377
1378         /**
1379          * @param $enable bool
1380          */
1381         protected function preventClickjacking( $enable = true ) {
1382                 $this->preventClickjacking = $enable;
1383         }
1384
1385         /**
1386          * @return bool
1387          */
1388         public function getPreventClickjacking() {
1389                 return $this->preventClickjacking;
1390         }
1391
1392 }