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 $id Int 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          * However, also include the shared description text
  98          * so that cascading ForeignAPIRepo's work.
  99          *
 100          * @note This uses a div with the class "mw-shared-image-desc"
 101          *    as opposed to the id "mw-shared-image-desc" since the text
 102          *    from here may be cascadingly transcluded to other shared
 103          *    repos, and we want all ids to be unique. On normal
 104          *    view, the outermost shared description will still have
 105          *    the id.
 106          *
 107          * This also differs from normal view in that "shareddescriptionfollows"
 108          * message is not shown. I was not sure if it was appropriate to
 109          * add that message here.
 110          */
 111         public function render() {
 112                 $out = $this->getContext()->getOutput();
 113                 $this->loadFile();
 114
 115                 $descText = $this->mPage->getFile()->getDescriptionText();
 116
 117                 $out->setArticleBodyOnly( true );
 118
 119                 if ( !$descText ) {
 120                         // If no description text, just do standard action=render
 121                         parent::view();
 122                 } else {
 123                         if ( $this->mPage->getID() !== 0 ) {
 124                                 // Local description exists. We need to output both
 125                                 parent::view();
 126                                 $out->addHTML( '<div class="mw-shared-image-desc">' . $descText . "</div>\n" );
 127                         } else {
 128                                 // We don't want to output both a "noarticletext" message and the shared
 129                                 // description, so don't call parent::view().
 130                                 $out->addHTML( '<div class="mw-shared-image-desc">' . $descText . "</div>\n" );
 131                                 // Since we did not call parent::view(), have to call some methods it
 132                                 // normally takes care of. (Not that it matters much since skin not displayed)
 133                                 $out->setArticleFlag( true );
 134                                 $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 135                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 136                         }
 137                 }
 138         }
 139
 140         public function view() {
 141                 global $wgShowEXIF;
 142
 143                 $out = $this->getContext()->getOutput();
 144                 $request = $this->getContext()->getRequest();
 145                 $diff = $request->getVal( 'diff' );
 146                 $diffOnly = $request->getBool( 'diffonly', $this->getContext()->getUser()->getOption( 'diffonly' ) );
 147
 148                 if ( $this->getTitle()->getNamespace() != NS_FILE || ( isset( $diff ) && $diffOnly ) ) {
 149                         parent::view();
 150                         return;
 151                 }
 152
 153                 $this->loadFile();
 154
 155                 if ( $this->getTitle()->getNamespace() == NS_FILE && $this->mPage->getFile()->getRedirected() ) {
 156                         if ( $this->getTitle()->getDBkey() == $this->mPage->getFile()->getName() || isset( $diff ) ) {
 157                                 // mTitle is the same as the redirect target so ask Article
 158                                 // to perform the redirect for us.
 159                                 $request->setVal( 'diffonly', 'true' );
 160                                 parent::view();
 161                                 return;
 162                         } else {
 163                                 // mTitle is not the same as the redirect target so it is
 164                                 // probably the redirect page itself. Fake the redirect symbol
 165                                 $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 166                                 $out->addHTML( $this->viewRedirect( Title::makeTitle( NS_FILE, $this->mPage->getFile()->getName() ),
 167                                         /* $appendSubtitle */ true, /* $forceKnown */ true ) );
 168                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 169                                 return;
 170                         }
 171                 }
 172
 173                 if ( $wgShowEXIF && $this->displayImg->exists() ) {
 174                         // @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 175                         $formattedMetadata = $this->displayImg->formatMetadata();
 176                         $showmeta = $formattedMetadata !== false;
 177                 } else {
 178                         $showmeta = false;
 179                 }
 180
 181                 if ( !$diff && $this->displayImg->exists() ) {
 182                         $out->addHTML( $this->showTOC( $showmeta ) );
 183                 }
 184
 185                 if ( !$diff ) {
 186                         $this->openShowImage();
 187                 }
 188
 189                 # No need to display noarticletext, we use our own message, output in openShowImage()
 190                 if ( $this->mPage->getID() ) {
 191                         # NS_FILE is in the user language, but this section (the actual wikitext)
 192                         # should be in page content language
 193                         $pageLang = $this->getTitle()->getPageViewLanguage();
 194                         $out->addHTML( Xml::openElement( 'div', array( 'id' => 'mw-imagepage-content',
 195                                 'lang' => $pageLang->getHtmlCode(), 'dir' => $pageLang->getDir(),
 196                                 'class' => 'mw-content-'.$pageLang->getDir() ) ) );
 197                         parent::view();
 198                         $out->addHTML( Xml::closeElement( 'div' ) );
 199                 } else {
 200                         # Just need to set the right headers
 201                         $out->setArticleFlag( true );
 202                         $out->setPageTitle( $this->getTitle()->getPrefixedText() );
 203                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 204                 }
 205
 206                 # Show shared description, if needed
 207                 if ( $this->mExtraDescription ) {
 208                         $fol = wfMessage( 'shareddescriptionfollows' );
 209                         if ( !$fol->isDisabled() ) {
 210                                 $out->addWikiText( $fol->plain() );
 211                         }
 212                         $out->addHTML( '<div id="shared-image-desc" class="mw-shared-image-desc">' . $this->mExtraDescription . "</div>\n" );
 213                 }
 214
 215                 $this->closeShowImage();
 216                 $this->imageHistory();
 217                 // TODO: Cleanup the following
 218
 219                 $out->addHTML( Xml::element( 'h2',
 220                         array( 'id' => 'filelinks' ),
 221                         wfMessage( 'imagelinks' )->text() ) . "\n" );
 222                 $this->imageDupes();
 223                 # @todo FIXME: For some freaky reason, we can't redirect to foreign images.
 224                 # Yet we return metadata about the target. Definitely an issue in the FileRepo
 225                 $this->imageLinks();
 226
 227                 # Allow extensions to add something after the image links
 228                 $html = '';
 229                 wfRunHooks( 'ImagePageAfterImageLinks', array( $this, &$html ) );
 230                 if ( $html ) {
 231                         $out->addHTML( $html );
 232                 }
 233
 234                 if ( $showmeta ) {
 235                         $out->addHTML( Xml::element(
 236                                 'h2',
 237                                 array( 'id' => 'metadata' ),
 238                                 wfMessage( 'metadata' )->text() ) . "\n" );
 239                         $out->addWikiText( $this->makeMetadataTable( $formattedMetadata ) );
 240                         $out->addModules( array( 'mediawiki.action.view.metadata' ) );
 241                 }
 242
 243                 // Add remote Filepage.css
 244                 if( !$this->repo->isLocal() ) {
 245                         $css = $this->repo->getDescriptionStylesheetUrl();
 246                         if ( $css ) {
 247                                 $out->addStyle( $css );
 248                         }
 249                 }
 250                 // always show the local local Filepage.css, bug 29277
 251                 $out->addModuleStyles( 'filepage' );
 252         }
 253
 254         /**
 255          * @return File
 256          */
 257         public function getDisplayedFile() {
 258                 $this->loadFile();
 259                 return $this->displayImg;
 260         }
 261
 262         /**
 263          * Create the TOC
 264          *
 265          * @param $metadata Boolean: whether or not to show the metadata link
 266          * @return String
 267          */
 268         protected function showTOC( $metadata ) {
 269                 $r = array(
 270                         '<li><a href="#file">' . wfMessage( 'file-anchor-link' )->escaped() . '</a></li>',
 271                         '<li><a href="#filehistory">' . wfMessage( 'filehist' )->escaped() . '</a></li>',
 272                         '<li><a href="#filelinks">' . wfMessage( 'imagelinks' )->escaped() . '</a></li>',
 273                 );
 274                 if ( $metadata ) {
 275                         $r[] = '<li><a href="#metadata">' . wfMessage( 'metadata' )->escaped() . '</a></li>';
 276                 }
 277
 278                 wfRunHooks( 'ImagePageShowTOC', array( $this, &$r ) );
 279
 280                 return '<ul id="filetoc">' . implode( "\n", $r ) . '</ul>';
 281         }
 282
 283         /**
 284          * Make a table with metadata to be shown in the output page.
 285          *
 286          * @todo FIXME: Bad interface, see note on MediaHandler::formatMetadata().
 287          *
 288          * @param $metadata Array: the array containing the EXIF data
 289          * @return String The metadata table. This is treated as Wikitext (!)
 290          */
 291         protected function makeMetadataTable( $metadata ) {
 292                 $r = "<div class=\"mw-imagepage-section-metadata\">";
 293                 $r .= wfMessage( 'metadata-help' )->plain();
 294                 $r .= "<table id=\"mw_metadata\" class=\"mw_metadata\">\n";
 295                 foreach ( $metadata as $type => $stuff ) {
 296                         foreach ( $stuff as $v ) {
 297                                 # @todo FIXME: Why is this using escapeId for a class?!
 298                                 $class = Sanitizer::escapeId( $v['id'] );
 299                                 if ( $type == 'collapsed' ) {
 300                                         $class .= ' collapsable';
 301                                 }
 302                                 $r .= "<tr class=\"$class\">\n";
 303                                 $r .= "<th>{$v['name']}</th>\n";
 304                                 $r .= "<td>{$v['value']}</td>\n</tr>";
 305                         }
 306                 }
 307                 $r .= "</table>\n</div>\n";
 308                 return $r;
 309         }
 310
 311         /**
 312          * Overloading Article's getContent method.
 313          *
 314          * Omit noarticletext if sharedupload; text will be fetched from the
 315          * shared upload server if possible.
 316          * @return string
 317          */
 318         public function getContent() {
 319                 $this->loadFile();
 320                 if ( $this->mPage->getFile() && !$this->mPage->getFile()->isLocal() && 0 == $this->getID() ) {
 321                         return '';
 322                 }
 323                 return parent::getContent();
 324         }
 325
 326         protected function openShowImage() {
 327                 global $wgImageLimits, $wgEnableUploads, $wgSend404Code;
 328
 329                 $this->loadFile();
 330                 $out = $this->getContext()->getOutput();
 331                 $user = $this->getContext()->getUser();
 332                 $lang = $this->getContext()->getLanguage();
 333                 $dirmark = $lang->getDirMarkEntity();
 334                 $request = $this->getContext()->getRequest();
 335
 336                 $sizeSel = intval( $user->getOption( 'imagesize' ) );
 337                 if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 338                         $sizeSel = User::getDefaultOption( 'imagesize' );
 339
 340                         // The user offset might still be incorrect, specially if
 341                         // $wgImageLimits got changed (see bug #8858).
 342                         if ( !isset( $wgImageLimits[$sizeSel] ) ) {
 343                                 // Default to the first offset in $wgImageLimits
 344                                 $sizeSel = 0;
 345                         }
 346                 }
 347                 $max = $wgImageLimits[$sizeSel];
 348                 $maxWidth = $max[0];
 349                 $maxHeight = $max[1];
 350
 351                 if ( $this->displayImg->exists() ) {
 352                         # image
 353                         $page = $request->getIntOrNull( 'page' );
 354                         if ( is_null( $page ) ) {
 355                                 $params = array();
 356                                 $page = 1;
 357                         } else {
 358                                 $params = array( 'page' => $page );
 359                         }
 360                         $width_orig = $this->displayImg->getWidth( $page );
 361                         $width = $width_orig;
 362                         $height_orig = $this->displayImg->getHeight( $page );
 363                         $height = $height_orig;
 364
 365                         $longDesc = wfMessage( 'parentheses', $this->displayImg->getLongDesc() )->text();
 366
 367                         wfRunHooks( 'ImageOpenShowImageInlineBefore', array( &$this, &$out ) );
 368
 369                         if ( $this->displayImg->allowInlineDisplay() ) {
 370                                 # image
 371
 372                                 # "Download high res version" link below the image
 373                                 # $msgsize = wfMessage( 'file-info-size', $width_orig, $height_orig, Linker::formatSize( $this->displayImg->getSize() ), $mime )->escaped();
 374                                 # We'll show a thumbnail of this image
 375                                 if ( $width > $maxWidth || $height > $maxHeight ) {
 376                                         # Calculate the thumbnail size.
 377                                         # First case, the limiting factor is the width, not the height.
 378                                         if ( $width / $height >= $maxWidth / $maxHeight ) {
 379                                                 $height = round( $height * $maxWidth / $width );
 380                                                 $width = $maxWidth;
 381                                                 # Note that $height <= $maxHeight now.
 382                                         } else {
 383                                                 $newwidth = floor( $width * $maxHeight / $height );
 384                                                 $height = round( $height * $newwidth / $width );
 385                                                 $width = $newwidth;
 386                                                 # Note that $height <= $maxHeight now, but might not be identical
 387                                                 # because of rounding.
 388                                         }
 389                                         $msgbig = wfMessage( 'show-big-image' )->escaped();
 390                                         if ( $this->displayImg->getRepo()->canTransformVia404() ) {
 391                                                 $thumbSizes = $wgImageLimits;
 392                                         } else {
 393                                                 # Creating thumb links triggers thumbnail generation.
 394                                                 # Just generate the thumb for the current users prefs.
 395                                                 $thumbOption = $user->getOption( 'thumbsize' );
 396                                                 $thumbSizes = array( isset( $wgImageLimits[$thumbOption] )
 397                                                         ? $wgImageLimits[$thumbOption]
 398                                                         : $wgImageLimits[User::getDefaultOption( 'thumbsize' )] );
 399                                         }
 400                                         # Generate thumbnails or thumbnail links as needed...
 401                                         $otherSizes = array();
 402                                         foreach ( $thumbSizes as $size ) {
 403                                                 if ( $size[0] < $width_orig && $size[1] < $height_orig
 404                                                         && $size[0] != $width && $size[1] != $height )
 405                                                 {
 406                                                         $otherSizes[] = $this->makeSizeLink( $params, $size[0], $size[1] );
 407                                                 }
 408                                         }
 409                                         $msgsmall = wfMessage( 'show-big-image-preview' )->
 410                                                 rawParams( $this->makeSizeLink( $params, $width, $height ) )->
 411                                                 parse();
 412                                         if ( count( $otherSizes ) ) {
 413                                                 $msgsmall .= ' ' .
 414                                                 Html::rawElement( 'span', array( 'class' => 'mw-filepage-other-resolutions' ),
 415                                                         wfMessage( 'show-big-image-other' )->rawParams( $lang->pipeList( $otherSizes ) )->
 416                                                         params( count( $otherSizes ) )->parse()
 417                                                 );
 418                                         }
 419                                 } elseif ( $width == 0 && $height == 0 ){
 420                                         # Some sort of audio file that doesn't have dimensions
 421                                         # Don't output a no hi res message for such a file
 422                                         $msgsmall = '';
 423                                 } else {
 424                                         # Image is small enough to show full size on image page
 425                                         $msgsmall = wfMessage( 'file-nohires' )->parse();
 426                                 }
 427
 428                                 $params['width'] = $width;
 429                                 $params['height'] = $height;
 430                                 $thumbnail = $this->displayImg->transform( $params );
 431
 432                                 $showLink = true;
 433                                 $anchorclose = Html::rawElement( 'div', array( 'class' => 'mw-filepage-resolutioninfo' ), $msgsmall );
 434
 435                                 $isMulti = $this->displayImg->isMultipage() && $this->displayImg->pageCount() > 1;
 436                                 if ( $isMulti ) {
 437                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 438                                 }
 439
 440                                 if ( $thumbnail ) {
 441                                         $options = array(
 442                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 443                                                 'file-link' => true,
 444                                         );
 445                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 446                                                 $thumbnail->toHtml( $options ) .
 447                                                 $anchorclose . "</div>\n" );
 448                                 }
 449
 450                                 if ( $isMulti ) {
 451                                         $count = $this->displayImg->pageCount();
 452
 453                                         if ( $page > 1 ) {
 454                                                 $label = $out->parse( wfMessage( 'imgmultipageprev' )->text(), false );
 455                                                 $link = Linker::linkKnown(
 456                                                         $this->getTitle(),
 457                                                         $label,
 458                                                         array(),
 459                                                         array( 'page' => $page - 1 )
 460                                                 );
 461                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 462                                                         array( 'page' => $page - 1 ) );
 463                                         } else {
 464                                                 $thumb1 = '';
 465                                         }
 466
 467                                         if ( $page < $count ) {
 468                                                 $label = wfMessage( 'imgmultipagenext' )->text();
 469                                                 $link = Linker::linkKnown(
 470                                                         $this->getTitle(),
 471                                                         $label,
 472                                                         array(),
 473                                                         array( 'page' => $page + 1 )
 474                                                 );
 475                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 476                                                         array( 'page' => $page + 1 ) );
 477                                         } else {
 478                                                 $thumb2 = '';
 479                                         }
 480
 481                                         global $wgScript;
 482
 483                                         $formParams = array(
 484                                                 'name' => 'pageselector',
 485                                                 'action' => $wgScript,
 486                                                 'onchange' => 'document.pageselector.submit();',
 487                                         );
 488                                         $options = array();
 489                                         for ( $i = 1; $i <= $count; $i++ ) {
 490                                                 $options[] = Xml::option( $lang->formatNum( $i ), $i, $i == $page );
 491                                         }
 492                                         $select = Xml::tags( 'select',
 493                                                 array( 'id' => 'pageselector', 'name' => 'page' ),
 494                                                 implode( "\n", $options ) );
 495
 496                                         $out->addHTML(
 497                                                 '</td><td><div class="multipageimagenavbox">' .
 498                                                 Xml::openElement( 'form', $formParams ) .
 499                                                 Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 500                                                         wfMessage( 'imgmultigoto' )->rawParams( $select )->parse() .
 501                                                 Xml::submitButton( wfMessage( 'imgmultigo' )->text() ) .
 502                                                 Xml::closeElement( 'form' ) .
 503                                                 "<hr />$thumb1\n$thumb2<br style=\"clear: both\" /></div></td></tr></table>"
 504                                         );
 505                                 }
 506                         } else {
 507                                 # if direct link is allowed but it's not a renderable image, show an icon.
 508                                 if ( $this->displayImg->isSafeFile() ) {
 509                                         $icon = $this->displayImg->iconThumb();
 510
 511                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 512                                                 $icon->toHtml( array( 'file-link' => true ) ) .
 513                                                 "</div>\n" );
 514                                 }
 515
 516                                 $showLink = true;
 517                         }
 518
 519                         if ( $showLink ) {
 520                                 $filename = wfEscapeWikiText( $this->displayImg->getName() );
 521                                 $linktext = $filename;
 522                                 if ( isset( $msgbig ) ) {
 523                                         $linktext = wfEscapeWikiText( $msgbig );
 524                                 }
 525                                 $medialink = "[[Media:$filename|$linktext]]";
 526
 527                                 if ( !$this->displayImg->isSafeFile() ) {
 528                                         $warning = wfMessage( 'mediawarning' )->plain();
 529                                         // dirmark is needed here to separate the file name, which
 530                                         // most likely ends in Latin characters, from the description,
 531                                         // which may begin with the file type. In RTL environment
 532                                         // this will get messy.
 533                                         // The dirmark, however, must not be immediately adjacent
 534                                         // to the filename, because it can get copied with it.
 535                                         // See bug 25277.
 536                                         $out->addWikiText( <<<EOT
 537 <div class="fullMedia"><span class="dangerousLink">{$medialink}</span> $dirmark<span class="fileInfo">$longDesc</span></div>
 538 <div class="mediaWarning">$warning</div>
 539 EOT
 540                                                 );
 541                                 } else {
 542                                         $out->addWikiText( <<<EOT
 543 <div class="fullMedia">{$medialink} {$dirmark}<span class="fileInfo">$longDesc</span>
 544 </div>
 545 EOT
 546                                         );
 547                                 }
 548                         }
 549
 550                         // Add cannot animate thumbnail warning
 551                         if ( !$this->displayImg->canAnimateThumbIfAppropriate() ) {
 552                                 // Include the extension so wiki admins can
 553                                 // customize it on a per file-type basis
 554                                 // (aka say things like use format X instead).
 555                                 // additionally have a specific message for
 556                                 // file-no-thumb-animation-gif
 557                                 $ext = $this->displayImg->getExtension();
 558                                 $noAnimMesg = wfMessageFallback(
 559                                         'file-no-thumb-animation-' . $ext,
 560                                         'file-no-thumb-animation'
 561                                 )->plain();
 562
 563                                 $out->addWikiText( <<<EOT
 564 <div class="mw-noanimatethumb">{$noAnimMesg}</div>
 565 EOT
 566                                 );
 567                         }
 568
 569                         if ( !$this->displayImg->isLocal() ) {
 570                                 $this->printSharedImageText();
 571                         }
 572                 } else {
 573                         # Image does not exist
 574                         if ( !$this->getID() ) {
 575                                 # No article exists either
 576                                 # Show deletion log to be consistent with normal articles
 577                                 LogEventsList::showLogExtract(
 578                                         $out,
 579                                         array( 'delete', 'move' ),
 580                                         $this->getTitle()->getPrefixedText(),
 581                                         '',
 582                                         array(  'lim' => 10,
 583                                                 'conds' => array( "log_action != 'revision'" ),
 584                                                 'showIfEmpty' => false,
 585                                                 'msgKey' => array( 'moveddeleted-notice' )
 586                                         )
 587                                 );
 588                         }
 589
 590                         if ( $wgEnableUploads && $user->isAllowed( 'upload' ) ) {
 591                                 // Only show an upload link if the user can upload
 592                                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 593                                 $nofile = array(
 594                                         'filepage-nofile-link',
 595                                         $uploadTitle->getFullURL( array( 'wpDestFile' => $this->mPage->getFile()->getName() ) )
 596                                 );
 597                         } else {
 598                                 $nofile = 'filepage-nofile';
 599                         }
 600                         // Note, if there is an image description page, but
 601                         // no image, then this setRobotPolicy is overriden
 602                         // by Article::View().
 603                         $out->setRobotPolicy( 'noindex,nofollow' );
 604                         $out->wrapWikiMsg( "<div id='mw-imagepage-nofile' class='plainlinks'>\n$1\n</div>", $nofile );
 605                         if ( !$this->getID() && $wgSend404Code ) {
 606                                 // If there is no image, no shared image, and no description page,
 607                                 // output a 404, to be consistent with articles.
 608                                 $request->response()->header( 'HTTP/1.1 404 Not Found' );
 609                         }
 610                 }
 611                 $out->setFileVersion( $this->displayImg );
 612         }
 613
 614         /**
 615          * Creates an thumbnail of specified size and returns an HTML link to it
 616          * @param $params array Scaler parameters
 617          * @param $width int
 618          * @param $height int
 619          * @return string
 620          */
 621         private function makeSizeLink( $params, $width, $height ) {
 622                 $params['width'] = $width;
 623                 $params['height'] = $height;
 624                 $thumbnail = $this->displayImg->transform( $params );
 625                 if ( $thumbnail && !$thumbnail->isError() ) {
 626                         return Html::rawElement( 'a', array(
 627                                 'href' => $thumbnail->getUrl(),
 628                                 'class' => 'mw-thumbnail-link'
 629                                 ), wfMessage( 'show-big-image-size' )->numParams(
 630                                         $thumbnail->getWidth(), $thumbnail->getHeight()
 631                                 )->parse() );
 632                 } else {
 633                         return '';
 634                 }
 635         }
 636
 637         /**
 638          * Show a notice that the file is from a shared repository
 639          */
 640         protected function printSharedImageText() {
 641                 $out = $this->getContext()->getOutput();
 642                 $this->loadFile();
 643
 644                 $descUrl = $this->mPage->getFile()->getDescriptionUrl();
 645                 $descText = $this->mPage->getFile()->getDescriptionText();
 646
 647                 /* Add canonical to head if there is no local page for this shared file */
 648                 if( $descUrl && $this->mPage->getID() == 0 ) {
 649                         $out->addLink( array( 'rel' => 'canonical', 'href' => $descUrl ) );
 650                 }
 651
 652                 $wrap = "<div class=\"sharedUploadNotice\">\n$1\n</div>\n";
 653                 $repo = $this->mPage->getFile()->getRepo()->getDisplayName();
 654
 655                 if ( $descUrl && $descText && wfMessage( 'sharedupload-desc-here' )->plain() !== '-'  ) {
 656                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-here', $repo, $descUrl ) );
 657                 } elseif ( $descUrl && wfMessage( 'sharedupload-desc-there' )->plain() !== '-' ) {
 658                         $out->wrapWikiMsg( $wrap, array( 'sharedupload-desc-there', $repo, $descUrl ) );
 659                 } else {
 660                         $out->wrapWikiMsg( $wrap, array( 'sharedupload', $repo ), ''/*BACKCOMPAT*/ );
 661                 }
 662
 663                 if ( $descText ) {
 664                         $this->mExtraDescription = $descText;
 665                 }
 666         }
 667
 668         public function getUploadUrl() {
 669                 $this->loadFile();
 670                 $uploadTitle = SpecialPage::getTitleFor( 'Upload' );
 671                 return $uploadTitle->getFullURL( array(
 672                         'wpDestFile' => $this->mPage->getFile()->getName(),
 673                         'wpForReUpload' => 1
 674                  ) );
 675         }
 676
 677         /**
 678          * Print out the various links at the bottom of the image page, e.g. reupload,
 679          * external editing (and instructions link) etc.
 680          */
 681         protected function uploadLinksBox() {
 682                 global $wgEnableUploads, $wgUseExternalEditor;
 683
 684                 if ( !$wgEnableUploads ) {
 685                         return;
 686                 }
 687
 688                 $this->loadFile();
 689                 if ( !$this->mPage->getFile()->isLocal() ) {
 690                         return;
 691                 }
 692
 693                 $out = $this->getContext()->getOutput();
 694                 $out->addHTML( "<ul>\n" );
 695
 696                 # "Upload a new version of this file" link
 697                 $canUpload = $this->getTitle()->userCan( 'upload', $this->getContext()->getUser() );
 698                 if ( $canUpload && UploadBase::userCanReUpload( $this->getContext()->getUser(), $this->mPage->getFile()->name ) ) {
 699                         $ulink = Linker::makeExternalLink( $this->getUploadUrl(), wfMessage( 'uploadnewversion-linktext' )->text() );
 700                         $out->addHTML( "<li id=\"mw-imagepage-reupload-link\"><div class=\"plainlinks\">{$ulink}</div></li>\n" );
 701                 } else {
 702                         $out->addHTML( "<li id=\"mw-imagepage-upload-disallowed\">" . $this->getContext()->msg( 'upload-disallowed-here' )->escaped() . "</li>\n" );
 703                 }
 704
 705                 # External editing link
 706                 if ( $wgUseExternalEditor ) {
 707                         $elink = Linker::linkKnown(
 708                                 $this->getTitle(),
 709                                 wfMessage( 'edit-externally' )->escaped(),
 710                                 array(),
 711                                 array(
 712                                         'action' => 'edit',
 713                                         'externaledit' => 'true',
 714                                         'mode' => 'file'
 715                                 )
 716                         );
 717                         $out->addHTML(
 718                                 '<li id="mw-imagepage-edit-external">' . $elink . ' <small>' .
 719                                         wfMessage( 'edit-externally-help' )->parse() .
 720                                         "</small></li>\n"
 721                         );
 722                 }
 723
 724                 $out->addHTML( "</ul>\n" );
 725         }
 726
 727         protected function closeShowImage() { } # For overloading
 728
 729         /**
 730          * If the page we've just displayed is in the "Image" namespace,
 731          * we follow it with an upload history of the image and its usage.
 732          */
 733         protected function imageHistory() {
 734                 $this->loadFile();
 735                 $out = $this->getContext()->getOutput();
 736                 $pager = new ImageHistoryPseudoPager( $this );
 737                 $out->addHTML( $pager->getBody() );
 738                 $out->preventClickjacking( $pager->getPreventClickjacking() );
 739
 740                 $this->mPage->getFile()->resetHistory(); // free db resources
 741
 742                 # Exist check because we don't want to show this on pages where an image
 743                 # doesn't exist along with the noimage message, that would suck. -ævar
 744                 if ( $this->mPage->getFile()->exists() ) {
 745                         $this->uploadLinksBox();
 746                 }
 747         }
 748
 749         /**
 750          * @param $target
 751          * @param $limit
 752          * @return ResultWrapper
 753          */
 754         protected function queryImageLinks( $target, $limit ) {
 755                 $dbr = wfGetDB( DB_SLAVE );
 756
 757                 return $dbr->select(
 758                         array( 'imagelinks', 'page' ),
 759                         array( 'page_namespace', 'page_title', 'page_is_redirect', 'il_to' ),
 760                         array( 'il_to' => $target, 'il_from = page_id' ),
 761                         __METHOD__,
 762                         array( 'LIMIT' => $limit + 1, 'ORDER BY' => 'il_from', )
 763                 );
 764         }
 765
 766         protected function imageLinks() {
 767                 $limit = 100;
 768
 769                 $out = $this->getContext()->getOutput();
 770                 $res = $this->queryImageLinks( $this->getTitle()->getDbKey(), $limit + 1);
 771                 $rows = array();
 772                 $redirects = array();
 773                 foreach ( $res as $row ) {
 774                         if ( $row->page_is_redirect ) {
 775                                 $redirects[$row->page_title] = array();
 776                         }
 777                         $rows[] = $row;
 778                 }
 779                 $count = count( $rows );
 780
 781                 $hasMore = $count > $limit;
 782                 if ( !$hasMore && count( $redirects ) ) {
 783                         $res = $this->queryImageLinks( array_keys( $redirects ),
 784                                 $limit - count( $rows ) + 1 );
 785                         foreach ( $res as $row ) {
 786                                 $redirects[$row->il_to][] = $row;
 787                                 $count++;
 788                         }
 789                         $hasMore = ( $res->numRows() + count( $rows ) ) > $limit;
 790                 }
 791
 792                 if ( $count == 0 ) {
 793                         $out->wrapWikiMsg(
 794                                 Html::rawElement( 'div',
 795                                         array( 'id' => 'mw-imagepage-nolinkstoimage' ), "\n$1\n" ),
 796                                 'nolinkstoimage'
 797                         );
 798                         return;
 799                 }
 800
 801                 $out->addHTML( "<div id='mw-imagepage-section-linkstoimage'>\n" );
 802                 if ( !$hasMore ) {
 803                         $out->addWikiMsg( 'linkstoimage', $count );
 804                 } else {
 805                         // More links than the limit. Add a link to [[Special:Whatlinkshere]]
 806                         $out->addWikiMsg( 'linkstoimage-more',
 807                                 $this->getContext()->getLanguage()->formatNum( $limit ),
 808                                 $this->getTitle()->getPrefixedDBkey()
 809                         );
 810                 }
 811
 812                 $out->addHTML(
 813                         Html::openElement( 'ul',
 814                                 array( 'class' => 'mw-imagepage-linkstoimage' ) ) . "\n"
 815                 );
 816                 $count = 0;
 817
 818                 // Sort the list by namespace:title
 819                 usort( $rows, array( $this, 'compare' ) );
 820
 821                 // Create links for every element
 822                 $currentCount = 0;
 823                 foreach( $rows as $element ) {
 824                         $currentCount++;
 825                         if ( $currentCount > $limit ) {
 826                                 break;
 827                         }
 828
 829                         $link = Linker::linkKnown( Title::makeTitle( $element->page_namespace, $element->page_title ) );
 830                         if ( !isset( $redirects[$element->page_title] ) ) {
 831                                 $liContents = $link;
 832                         } else {
 833                                 $ul = "<ul class='mw-imagepage-redirectstofile'>\n";
 834                                 foreach ( $redirects[$element->page_title] as $row ) {
 835                                         $currentCount++;
 836                                         if ( $currentCount > $limit ) {
 837                                                 break;
 838                                         }
 839
 840                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 841                                         $ul .= Html::rawElement(
 842                                                 'li',
 843                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 844                                                 $link2
 845                                                 ) . "\n";
 846                                 }
 847                                 $ul .= '</ul>';
 848                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 849                                         $link, $ul )->parse();
 850                         }
 851                         $out->addHTML( Html::rawElement(
 852                                         'li',
 853                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 854                                         $liContents
 855                                 ) . "\n"
 856                         );
 857
 858                 };
 859                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 860                 $res->free();
 861
 862                 // Add a links to [[Special:Whatlinkshere]]
 863                 if ( $count > $limit ) {
 864                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 865                 }
 866                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 867         }
 868
 869         protected function imageDupes() {
 870                 $this->loadFile();
 871                 $out = $this->getContext()->getOutput();
 872
 873                 $dupes = $this->mPage->getDuplicates();
 874                 if ( count( $dupes ) == 0 ) {
 875                         return;
 876                 }
 877
 878                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 879                 $out->addWikiMsg( 'duplicatesoffile',
 880                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 881                 );
 882                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 883
 884                 /**
 885                  * @var $file File
 886                  */
 887                 foreach ( $dupes as $file ) {
 888                         $fromSrc = '';
 889                         if ( $file->isLocal() ) {
 890                                 $link = Linker::linkKnown( $file->getTitle() );
 891                         } else {
 892                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 893                                         $file->getTitle()->getPrefixedText() );
 894                                 $fromSrc = wfMessage( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 895                         }
 896                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 897                 }
 898                 $out->addHTML( "</ul></div>\n" );
 899         }
 900
 901         /**
 902          * Delete the file, or an earlier version of it
 903          */
 904         public function delete() {
 905                 $file = $this->mPage->getFile();
 906                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 907                         // Standard article deletion
 908                         parent::delete();
 909                         return;
 910                 }
 911
 912                 $deleter = new FileDeleteForm( $file );
 913                 $deleter->execute();
 914         }
 915
 916         /**
 917          * Display an error with a wikitext description
 918          *
 919          * @param $description String
 920          */
 921         function showError( $description ) {
 922                 $out = $this->getContext()->getOutput();
 923                 $out->setPageTitle( wfMessage( 'internalerror' ) );
 924                 $out->setRobotPolicy( 'noindex,nofollow' );
 925                 $out->setArticleRelated( false );
 926                 $out->enableClientCache( false );
 927                 $out->addWikiText( $description );
 928         }
 929
 930         /**
 931          * Callback for usort() to do link sorts by (namespace, title)
 932          * Function copied from Title::compare()
 933          *
 934          * @param $a object page to compare with
 935          * @param $b object page to compare with
 936          * @return Integer: result of string comparison, or namespace comparison
 937          */
 938         protected function compare( $a, $b ) {
 939                 if ( $a->page_namespace == $b->page_namespace ) {
 940                         return strcmp( $a->page_title, $b->page_title );
 941                 } else {
 942                         return $a->page_namespace - $b->page_namespace;
 943                 }
 944         }
 945 }
 946
 947 /**
 948  * Builds the image revision log shown on image pages
 949  *
 950  * @ingroup Media
 951  */
 952 class ImageHistoryList extends ContextSource {
 953
 954         /**
 955          * @var Title
 956          */
 957         protected $title;
 958
 959         /**
 960          * @var File
 961          */
 962         protected $img;
 963
 964         /**
 965          * @var ImagePage
 966          */
 967         protected $imagePage;
 968
 969         /**
 970          * @var File
 971          */
 972         protected $current;
 973
 974         protected $repo, $showThumb;
 975         protected $preventClickjacking = false;
 976
 977         /**
 978          * @param ImagePage $imagePage
 979          */
 980         public function __construct( $imagePage ) {
 981                 global $wgShowArchiveThumbnails;
 982                 $this->current = $imagePage->getFile();
 983                 $this->img = $imagePage->getDisplayedFile();
 984                 $this->title = $imagePage->getTitle();
 985                 $this->imagePage = $imagePage;
 986                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 987                 $this->setContext( $imagePage->getContext() );
 988         }
 989
 990         /**
 991          * @return ImagePage
 992          */
 993         public function getImagePage() {
 994                 return $this->imagePage;
 995         }
 996
 997         /**
 998          * @return File
 999          */
1000         public function getFile() {
1001                 return $this->img;
1002         }
1003
1004         /**
1005          * @param $navLinks string
1006          * @return string
1007          */
1008         public function beginImageHistoryList( $navLinks = '' ) {
1009                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() ) . "\n"
1010                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
1011                         . $this->msg( 'filehist-help' )->parseAsBlock()
1012                         . $navLinks . "\n"
1013                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
1014                         . '<tr><td></td>'
1015                         . ( $this->current->isLocal() && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
1016                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1017                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1018                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1019                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1020                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1021                         . "</tr>\n";
1022         }
1023
1024         /**
1025          * @param $navLinks string
1026          * @return string
1027          */
1028         public function endImageHistoryList( $navLinks = '' ) {
1029                 return "</table>\n$navLinks\n</div>\n";
1030         }
1031
1032         /**
1033          * @param $iscur
1034          * @param $file File
1035          * @return string
1036          */
1037         public function imageHistoryLine( $iscur, $file ) {
1038                 global $wgContLang;
1039
1040                 $user = $this->getUser();
1041                 $lang = $this->getLanguage();
1042                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1043                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1044                 $userId = $file->getUser( 'id' );
1045                 $userText = $file->getUser( 'text' );
1046                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1047
1048                 $local = $this->current->isLocal();
1049                 $row = $selected = '';
1050
1051                 // Deletion link
1052                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1053                         $row .= '<td>';
1054                         # Link to remove from history
1055                         if ( $user->isAllowed( 'delete' ) ) {
1056                                 $q = array( 'action' => 'delete' );
1057                                 if ( !$iscur ) {
1058                                         $q['oldimage'] = $img;
1059                                 }
1060                                 $row .= Linker::linkKnown(
1061                                         $this->title,
1062                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1063                                         array(), $q
1064                                 );
1065                         }
1066                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1067                         $canHide = $user->isAllowed( 'deleterevision' );
1068                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1069                                 if ( $user->isAllowed( 'delete' ) ) {
1070                                         $row .= '<br />';
1071                                 }
1072                                 // If file is top revision or locked from this user, don't link
1073                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1074                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1075                                 } else {
1076                                         list( $ts, ) = explode( '!', $img, 2 );
1077                                         $query = array(
1078                                                 'type'   => 'oldimage',
1079                                                 'target' => $this->title->getPrefixedText(),
1080                                                 'ids'    => $ts,
1081                                         );
1082                                         $del = Linker::revDeleteLink( $query,
1083                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1084                                 }
1085                                 $row .= $del;
1086                         }
1087                         $row .= '</td>';
1088                 }
1089
1090                 // Reversion link/current indicator
1091                 $row .= '<td>';
1092                 if ( $iscur ) {
1093                         $row .= $this->msg( 'filehist-current' )->escaped();
1094                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1095                         && $this->title->quickUserCan( 'upload', $user )
1096                 ) {
1097                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1098                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1099                         } else {
1100                                 $row .= Linker::linkKnown(
1101                                         $this->title,
1102                                         $this->msg( 'filehist-revert' )->escaped(),
1103                                         array(),
1104                                         array(
1105                                                 'action' => 'revert',
1106                                                 'oldimage' => $img,
1107                                                 'wpEditToken' => $user->getEditToken( $img )
1108                                         )
1109                                 );
1110                         }
1111                 }
1112                 $row .= '</td>';
1113
1114                 // Date/time and image link
1115                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1116                         $selected = "class='filehistory-selected'";
1117                 }
1118                 $row .= "<td $selected style='white-space: nowrap;'>";
1119                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1120                         # Don't link to unviewable files
1121                         $row .= '<span class="history-deleted">' . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1122                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1123                         if ( $local ) {
1124                                 $this->preventClickjacking();
1125                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1126                                 # Make a link to review the image
1127                                 $url = Linker::linkKnown(
1128                                         $revdel,
1129                                         $lang->userTimeAndDate( $timestamp, $user ),
1130                                         array(),
1131                                         array(
1132                                                 'target' => $this->title->getPrefixedText(),
1133                                                 'file' => $img,
1134                                                 'token' => $user->getEditToken( $img )
1135                                         )
1136                                 );
1137                         } else {
1138                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1139                         }
1140                         $row .= '<span class="history-deleted">' . $url . '</span>';
1141                 } else {
1142                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1143                         $row .= Xml::element( 'a', array( 'href' => $url ), $lang->userTimeAndDate( $timestamp, $user ) );
1144                 }
1145                 $row .= "</td>";
1146
1147                 // Thumbnail
1148                 if ( $this->showThumb ) {
1149                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1150                 }
1151
1152                 // Image dimensions + size
1153                 $row .= '<td>';
1154                 $row .= htmlspecialchars( $file->getDimensionsString() );
1155                 $row .= $this->msg( 'word-separator' )->plain();
1156                 $row .= '<span style="white-space: nowrap;">';
1157                 $row .= $this->msg( 'parentheses' )->rawParams( Linker::formatSize( $file->getSize() ) )->plain();
1158                 $row .= '</span>';
1159                 $row .= '</td>';
1160
1161                 // Uploading user
1162                 $row .= '<td>';
1163                 // Hide deleted usernames
1164                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1165                         $row .= '<span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1166                 } else {
1167                         if ( $local ) {
1168                                 $row .= Linker::userLink( $userId, $userText );
1169                                 $row .= $this->msg( 'word-separator' )->plain();
1170                                 $row .= '<span style="white-space: nowrap;">';
1171                                 $row .= Linker::userToolLinks( $userId, $userText );
1172                                 $row .= '</span>';
1173                         } else {
1174                                 $row .= htmlspecialchars( $userText );
1175                         }
1176                 }
1177                 $row .= '</td>';
1178
1179                 // Don't show deleted descriptions
1180                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1181                         $row .= '<td><span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1182                 } else {
1183                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1184                 }
1185
1186                 $rowClass = null;
1187                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1188                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1189
1190                 return "<tr{$classAttr}>{$row}</tr>\n";
1191         }
1192
1193         /**
1194          * @param $file File
1195          * @return string
1196          */
1197         protected function getThumbForLine( $file ) {
1198                 $lang = $this->getLanguage();
1199                 $user = $this->getUser();
1200                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE,$user )
1201                         && !$file->isDeleted( File::DELETED_FILE ) )
1202                 {
1203                         $params = array(
1204                                 'width' => '120',
1205                                 'height' => '120',
1206                         );
1207                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1208
1209                         $thumbnail = $file->transform( $params );
1210                         $options = array(
1211                                 'alt' => $this->msg( 'filehist-thumbtext',
1212                                         $lang->userTimeAndDate( $timestamp, $user ),
1213                                         $lang->userDate( $timestamp, $user ),
1214                                         $lang->userTime( $timestamp, $user ) )->text(),
1215                                 'file-link' => true,
1216                         );
1217
1218                         if ( !$thumbnail ) {
1219                                 return $this->msg( 'filehist-nothumb' )->escaped();
1220                         }
1221
1222                         return $thumbnail->toHtml( $options );
1223                 } else {
1224                         return $this->msg( 'filehist-nothumb' )->escaped();
1225                 }
1226         }
1227
1228         /**
1229          * @param $enable bool
1230          */
1231         protected function preventClickjacking( $enable = true ) {
1232                 $this->preventClickjacking = $enable;
1233         }
1234
1235         /**
1236          * @return bool
1237          */
1238         public function getPreventClickjacking() {
1239                 return $this->preventClickjacking;
1240         }
1241 }
1242
1243 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1244         protected $preventClickjacking = false;
1245
1246         /**
1247          * @var File
1248          */
1249         protected $mImg;
1250
1251         /**
1252          * @var Title
1253          */
1254         protected $mTitle;
1255
1256         /**
1257          * @param ImagePage $imagePage
1258          */
1259         function __construct( $imagePage ) {
1260                 parent::__construct();
1261                 $this->mImagePage = $imagePage;
1262                 $this->mTitle = clone ( $imagePage->getTitle() );
1263                 $this->mTitle->setFragment( '#filehistory' );
1264                 $this->mImg = null;
1265                 $this->mHist = array();
1266                 $this->mRange = array( 0, 0 ); // display range
1267         }
1268
1269         /**
1270          * @return Title
1271          */
1272         function getTitle() {
1273                 return $this->mTitle;
1274         }
1275
1276         function getQueryInfo() {
1277                 return false;
1278         }
1279
1280         /**
1281          * @return string
1282          */
1283         function getIndexField() {
1284                 return '';
1285         }
1286
1287         /**
1288          * @param $row object
1289          * @return string
1290          */
1291         function formatRow( $row ) {
1292                 return '';
1293         }
1294
1295         /**
1296          * @return string
1297          */
1298         function getBody() {
1299                 $s = '';
1300                 $this->doQuery();
1301                 if ( count( $this->mHist ) ) {
1302                         $list = new ImageHistoryList( $this->mImagePage );
1303                         # Generate prev/next links
1304                         $navLink = $this->getNavigationBar();
1305                         $s = $list->beginImageHistoryList( $navLink );
1306                         // Skip rows there just for paging links
1307                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1308                                 $file = $this->mHist[$i];
1309                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1310                         }
1311                         $s .= $list->endImageHistoryList( $navLink );
1312
1313                         if ( $list->getPreventClickjacking() ) {
1314                                 $this->preventClickjacking();
1315                         }
1316                 }
1317                 return $s;
1318         }
1319
1320         function doQuery() {
1321                 if ( $this->mQueryDone ) {
1322                         return;
1323                 }
1324                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1325                 if ( !$this->mImg->exists() ) {
1326                         return;
1327                 }
1328                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1329                 if ( $this->mIsBackwards ) {
1330                         // Fetch the file history
1331                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1332                         // The current rev may not meet the offset/limit
1333                         $numRows = count( $this->mHist );
1334                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1335                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1336                         }
1337                 } else {
1338                         // The current rev may not meet the offset
1339                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1340                                 $this->mHist[] = $this->mImg;
1341                         }
1342                         // Old image versions (fetch extra row for nav links)
1343                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1344                         // Fetch the file history
1345                         $this->mHist = array_merge( $this->mHist,
1346                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1347                 }
1348                 $numRows = count( $this->mHist ); // Total number of query results
1349                 if ( $numRows ) {
1350                         # Index value of top item in the list
1351                         $firstIndex = $this->mIsBackwards ?
1352                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1353                         # Discard the extra result row if there is one
1354                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1355                                 if ( $this->mIsBackwards ) {
1356                                         # Index value of item past the index
1357                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1358                                         # Index value of bottom item in the list
1359                                         $lastIndex = $this->mHist[1]->getTimestamp();
1360                                         # Display range
1361                                         $this->mRange = array( 1, $numRows - 1 );
1362                                 } else {
1363                                         # Index value of item past the index
1364                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1365                                         # Index value of bottom item in the list
1366                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1367                                         # Display range
1368                                         $this->mRange = array( 0, $numRows - 2 );
1369                                 }
1370                         } else {
1371                                 # Setting indexes to an empty string means that they will be
1372                                 # omitted if they would otherwise appear in URLs. It just so
1373                                 # happens that this  is the right thing to do in the standard
1374                                 # UI, in all the relevant cases.
1375                                 $this->mPastTheEndIndex = '';
1376                                 # Index value of bottom item in the list
1377                                 $lastIndex = $this->mIsBackwards ?
1378                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1379                                 # Display range
1380                                 $this->mRange = array( 0, $numRows - 1 );
1381                         }
1382                 } else {
1383                         $firstIndex = '';
1384                         $lastIndex = '';
1385                         $this->mPastTheEndIndex = '';
1386                 }
1387                 if ( $this->mIsBackwards ) {
1388                         $this->mIsFirst = ( $numRows < $queryLimit );
1389                         $this->mIsLast = ( $this->mOffset == '' );
1390                         $this->mLastShown = $firstIndex;
1391                         $this->mFirstShown = $lastIndex;
1392                 } else {
1393                         $this->mIsFirst = ( $this->mOffset == '' );
1394                         $this->mIsLast = ( $numRows < $queryLimit );
1395                         $this->mLastShown = $lastIndex;
1396                         $this->mFirstShown = $firstIndex;
1397                 }
1398                 $this->mQueryDone = true;
1399         }
1400
1401         /**
1402          * @param $enable bool
1403          */
1404         protected function preventClickjacking( $enable = true ) {
1405                 $this->preventClickjacking = $enable;
1406         }
1407
1408         /**
1409          * @return bool
1410          */
1411         public function getPreventClickjacking() {
1412                 return $this->preventClickjacking;
1413         }
1414
1415 }