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(), $this->getOldID() );
 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(), $this->getOldID() );
 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->addModules( 'mediawiki.page.image.pagination' );
 405                                         $out->addHTML( '<table class="multipageimage"><tr><td>' );
 406                                 }
 407
 408                                 if ( $thumbnail ) {
 409                                         $options = array(
 410                                                 'alt' => $this->displayImg->getTitle()->getPrefixedText(),
 411                                                 'file-link' => true,
 412                                         );
 413                                         $out->addHTML( '<div class="fullImageLink" id="file">' .
 414                                                 $thumbnail->toHtml( $options ) .
 415                                                 $anchorclose . "</div>\n" );
 416                                 }
 417
 418                                 if ( $isMulti ) {
 419                                         $count = $this->displayImg->pageCount();
 420
 421                                         if ( $page > 1 ) {
 422                                                 $label = $out->parse( wfMessage( 'imgmultipageprev' )->text(), false );
 423                                                 $link = Linker::linkKnown(
 424                                                         $this->getTitle(),
 425                                                         $label,
 426                                                         array(),
 427                                                         array( 'page' => $page - 1 )
 428                                                 );
 429                                                 $thumb1 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 430                                                         array( 'page' => $page - 1 ) );
 431                                         } else {
 432                                                 $thumb1 = '';
 433                                         }
 434
 435                                         if ( $page < $count ) {
 436                                                 $label = wfMessage( 'imgmultipagenext' )->text();
 437                                                 $link = Linker::linkKnown(
 438                                                         $this->getTitle(),
 439                                                         $label,
 440                                                         array(),
 441                                                         array( 'page' => $page + 1 )
 442                                                 );
 443                                                 $thumb2 = Linker::makeThumbLinkObj( $this->getTitle(), $this->displayImg, $link, $label, 'none',
 444                                                         array( 'page' => $page + 1 ) );
 445                                         } else {
 446                                                 $thumb2 = '';
 447                                         }
 448
 449                                         global $wgScript;
 450
 451                                         $formParams = array(
 452                                                 'name' => 'pageselector',
 453                                                 'action' => $wgScript,
 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( $this->getContext()->getLanguage() );
 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                         $query = array();
 769                         # Add a redirect=no to make redirect pages reachable
 770                         if ( isset( $redirects[$element->page_title] ) ) {
 771                                 $query['redirect'] = 'no';
 772                         }
 773                         $link = Linker::linkKnown(
 774                                 Title::makeTitle( $element->page_namespace, $element->page_title ),
 775                                 null, array(), $query
 776                         );
 777                         if ( !isset( $redirects[$element->page_title] ) ) {
 778                                 # No redirects
 779                                 $liContents = $link;
 780                         } elseif ( count( $redirects[$element->page_title] ) === 0 ) {
 781                                 # Redirect without usages
 782                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams( $link, '' )->parse();
 783                         } else {
 784                                 # Redirect with usages
 785                                 $li = '';
 786                                 foreach ( $redirects[$element->page_title] as $row ) {
 787                                         $currentCount++;
 788                                         if ( $currentCount > $limit ) {
 789                                                 break;
 790                                         }
 791
 792                                         $link2 = Linker::linkKnown( Title::makeTitle( $row->page_namespace, $row->page_title ) );
 793                                         $li .= Html::rawElement(
 794                                                 'li',
 795                                                 array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 796                                                 $link2
 797                                                 ) . "\n";
 798                                 }
 799
 800                                 $ul = Html::rawElement(
 801                                         'ul',
 802                                         array( 'class' => 'mw-imagepage-redirectstofile' ),
 803                                         $li
 804                                         ) . "\n";
 805                                 $liContents = wfMessage( 'linkstoimage-redirect' )->rawParams(
 806                                         $link, $ul )->parse();
 807                         }
 808                         $out->addHTML( Html::rawElement(
 809                                         'li',
 810                                         array( 'class' => 'mw-imagepage-linkstoimage-ns' . $element->page_namespace ),
 811                                         $liContents
 812                                 ) . "\n"
 813                         );
 814
 815                 };
 816                 $out->addHTML( Html::closeElement( 'ul' ) . "\n" );
 817                 $res->free();
 818
 819                 // Add a links to [[Special:Whatlinkshere]]
 820                 if ( $count > $limit ) {
 821                         $out->addWikiMsg( 'morelinkstoimage', $this->getTitle()->getPrefixedDBkey() );
 822                 }
 823                 $out->addHTML( Html::closeElement( 'div' ) . "\n" );
 824         }
 825
 826         protected function imageDupes() {
 827                 $this->loadFile();
 828                 $out = $this->getContext()->getOutput();
 829
 830                 $dupes = $this->mPage->getDuplicates();
 831                 if ( count( $dupes ) == 0 ) {
 832                         return;
 833                 }
 834
 835                 $out->addHTML( "<div id='mw-imagepage-section-duplicates'>\n" );
 836                 $out->addWikiMsg( 'duplicatesoffile',
 837                         $this->getContext()->getLanguage()->formatNum( count( $dupes ) ), $this->getTitle()->getDBkey()
 838                 );
 839                 $out->addHTML( "<ul class='mw-imagepage-duplicates'>\n" );
 840
 841                 /**
 842                  * @var $file File
 843                  */
 844                 foreach ( $dupes as $file ) {
 845                         $fromSrc = '';
 846                         if ( $file->isLocal() ) {
 847                                 $link = Linker::linkKnown( $file->getTitle() );
 848                         } else {
 849                                 $link = Linker::makeExternalLink( $file->getDescriptionUrl(),
 850                                         $file->getTitle()->getPrefixedText() );
 851                                 $fromSrc = wfMessage( 'shared-repo-from', $file->getRepo()->getDisplayName() )->text();
 852                         }
 853                         $out->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 854                 }
 855                 $out->addHTML( "</ul></div>\n" );
 856         }
 857
 858         /**
 859          * Delete the file, or an earlier version of it
 860          */
 861         public function delete() {
 862                 $file = $this->mPage->getFile();
 863                 if ( !$file->exists() || !$file->isLocal() || $file->getRedirected() ) {
 864                         // Standard article deletion
 865                         parent::delete();
 866                         return;
 867                 }
 868
 869                 $deleter = new FileDeleteForm( $file );
 870                 $deleter->execute();
 871         }
 872
 873         /**
 874          * Display an error with a wikitext description
 875          *
 876          * @param $description String
 877          */
 878         function showError( $description ) {
 879                 $out = $this->getContext()->getOutput();
 880                 $out->setPageTitle( wfMessage( 'internalerror' ) );
 881                 $out->setRobotPolicy( 'noindex,nofollow' );
 882                 $out->setArticleRelated( false );
 883                 $out->enableClientCache( false );
 884                 $out->addWikiText( $description );
 885         }
 886
 887         /**
 888          * Callback for usort() to do link sorts by (namespace, title)
 889          * Function copied from Title::compare()
 890          *
 891          * @param $a object page to compare with
 892          * @param $b object page to compare with
 893          * @return Integer: result of string comparison, or namespace comparison
 894          */
 895         protected function compare( $a, $b ) {
 896                 if ( $a->page_namespace == $b->page_namespace ) {
 897                         return strcmp( $a->page_title, $b->page_title );
 898                 } else {
 899                         return $a->page_namespace - $b->page_namespace;
 900                 }
 901         }
 902
 903         /**
 904          * Returns the corresponding $wgImageLimits entry for the selected user option
 905          *
 906          * @param $user User
 907          * @param string $optionName Name of a option to check, typically imagesize or thumbsize
 908          * @return array
 909          * @since 1.21
 910          */
 911         public function getImageLimitsFromOption( $user, $optionName ) {
 912                 global $wgImageLimits;
 913
 914                 $option = $user->getIntOption( $optionName );
 915                 if ( !isset( $wgImageLimits[$option] ) ) {
 916                         $option = User::getDefaultOption( $optionName );
 917                 }
 918
 919                 // The user offset might still be incorrect, specially if
 920                 // $wgImageLimits got changed (see bug #8858).
 921                 if ( !isset( $wgImageLimits[$option] ) ) {
 922                         // Default to the first offset in $wgImageLimits
 923                         $option = 0;
 924                 }
 925
 926                 return isset( $wgImageLimits[$option] )
 927                         ? $wgImageLimits[$option]
 928                         : array( 800, 600 ); // if nothing is set, fallback to a hardcoded default
 929         }
 930 }
 931
 932 /**
 933  * Builds the image revision log shown on image pages
 934  *
 935  * @ingroup Media
 936  */
 937 class ImageHistoryList extends ContextSource {
 938
 939         /**
 940          * @var Title
 941          */
 942         protected $title;
 943
 944         /**
 945          * @var File
 946          */
 947         protected $img;
 948
 949         /**
 950          * @var ImagePage
 951          */
 952         protected $imagePage;
 953
 954         /**
 955          * @var File
 956          */
 957         protected $current;
 958
 959         protected $repo, $showThumb;
 960         protected $preventClickjacking = false;
 961
 962         /**
 963          * @param ImagePage $imagePage
 964          */
 965         public function __construct( $imagePage ) {
 966                 global $wgShowArchiveThumbnails;
 967                 $this->current = $imagePage->getFile();
 968                 $this->img = $imagePage->getDisplayedFile();
 969                 $this->title = $imagePage->getTitle();
 970                 $this->imagePage = $imagePage;
 971                 $this->showThumb = $wgShowArchiveThumbnails && $this->img->canRender();
 972                 $this->setContext( $imagePage->getContext() );
 973         }
 974
 975         /**
 976          * @return ImagePage
 977          */
 978         public function getImagePage() {
 979                 return $this->imagePage;
 980         }
 981
 982         /**
 983          * @return File
 984          */
 985         public function getFile() {
 986                 return $this->img;
 987         }
 988
 989         /**
 990          * @param $navLinks string
 991          * @return string
 992          */
 993         public function beginImageHistoryList( $navLinks = '' ) {
 994                 return Xml::element( 'h2', array( 'id' => 'filehistory' ), $this->msg( 'filehist' )->text() ) . "\n"
 995                         . "<div id=\"mw-imagepage-section-filehistory\">\n"
 996                         . $this->msg( 'filehist-help' )->parseAsBlock()
 997                         . $navLinks . "\n"
 998                         . Xml::openElement( 'table', array( 'class' => 'wikitable filehistory' ) ) . "\n"
 999                         . '<tr><td></td>'
1000                         . ( $this->current->isLocal() && ( $this->getUser()->isAllowedAny( 'delete', 'deletedhistory' ) ) ? '<td></td>' : '' )
1001                         . '<th>' . $this->msg( 'filehist-datetime' )->escaped() . '</th>'
1002                         . ( $this->showThumb ? '<th>' . $this->msg( 'filehist-thumb' )->escaped() . '</th>' : '' )
1003                         . '<th>' . $this->msg( 'filehist-dimensions' )->escaped() . '</th>'
1004                         . '<th>' . $this->msg( 'filehist-user' )->escaped() . '</th>'
1005                         . '<th>' . $this->msg( 'filehist-comment' )->escaped() . '</th>'
1006                         . "</tr>\n";
1007         }
1008
1009         /**
1010          * @param $navLinks string
1011          * @return string
1012          */
1013         public function endImageHistoryList( $navLinks = '' ) {
1014                 return "</table>\n$navLinks\n</div>\n";
1015         }
1016
1017         /**
1018          * @param $iscur
1019          * @param $file File
1020          * @return string
1021          */
1022         public function imageHistoryLine( $iscur, $file ) {
1023                 global $wgContLang;
1024
1025                 $user = $this->getUser();
1026                 $lang = $this->getLanguage();
1027                 $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1028                 $img = $iscur ? $file->getName() : $file->getArchiveName();
1029                 $userId = $file->getUser( 'id' );
1030                 $userText = $file->getUser( 'text' );
1031                 $description = $file->getDescription( File::FOR_THIS_USER, $user );
1032
1033                 $local = $this->current->isLocal();
1034                 $row = $selected = '';
1035
1036                 // Deletion link
1037                 if ( $local && ( $user->isAllowedAny( 'delete', 'deletedhistory' ) ) ) {
1038                         $row .= '<td>';
1039                         # Link to remove from history
1040                         if ( $user->isAllowed( 'delete' ) ) {
1041                                 $q = array( 'action' => 'delete' );
1042                                 if ( !$iscur ) {
1043                                         $q['oldimage'] = $img;
1044                                 }
1045                                 $row .= Linker::linkKnown(
1046                                         $this->title,
1047                                         $this->msg( $iscur ? 'filehist-deleteall' : 'filehist-deleteone' )->escaped(),
1048                                         array(), $q
1049                                 );
1050                         }
1051                         # Link to hide content. Don't show useless link to people who cannot hide revisions.
1052                         $canHide = $user->isAllowed( 'deleterevision' );
1053                         if ( $canHide || ( $user->isAllowed( 'deletedhistory' ) && $file->getVisibility() ) ) {
1054                                 if ( $user->isAllowed( 'delete' ) ) {
1055                                         $row .= '<br />';
1056                                 }
1057                                 // If file is top revision or locked from this user, don't link
1058                                 if ( $iscur || !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
1059                                         $del = Linker::revDeleteLinkDisabled( $canHide );
1060                                 } else {
1061                                         list( $ts, ) = explode( '!', $img, 2 );
1062                                         $query = array(
1063                                                 'type' => 'oldimage',
1064                                                 'target' => $this->title->getPrefixedText(),
1065                                                 'ids' => $ts,
1066                                         );
1067                                         $del = Linker::revDeleteLink( $query,
1068                                                 $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1069                                 }
1070                                 $row .= $del;
1071                         }
1072                         $row .= '</td>';
1073                 }
1074
1075                 // Reversion link/current indicator
1076                 $row .= '<td>';
1077                 if ( $iscur ) {
1078                         $row .= $this->msg( 'filehist-current' )->escaped();
1079                 } elseif ( $local && $this->title->quickUserCan( 'edit', $user )
1080                         && $this->title->quickUserCan( 'upload', $user )
1081                 ) {
1082                         if ( $file->isDeleted( File::DELETED_FILE ) ) {
1083                                 $row .= $this->msg( 'filehist-revert' )->escaped();
1084                         } else {
1085                                 $row .= Linker::linkKnown(
1086                                         $this->title,
1087                                         $this->msg( 'filehist-revert' )->escaped(),
1088                                         array(),
1089                                         array(
1090                                                 'action' => 'revert',
1091                                                 'oldimage' => $img,
1092                                                 'wpEditToken' => $user->getEditToken( $img )
1093                                         )
1094                                 );
1095                         }
1096                 }
1097                 $row .= '</td>';
1098
1099                 // Date/time and image link
1100                 if ( $file->getTimestamp() === $this->img->getTimestamp() ) {
1101                         $selected = "class='filehistory-selected'";
1102                 }
1103                 $row .= "<td $selected style='white-space: nowrap;'>";
1104                 if ( !$file->userCan( File::DELETED_FILE, $user ) ) {
1105                         # Don't link to unviewable files
1106                         $row .= '<span class="history-deleted">' . $lang->userTimeAndDate( $timestamp, $user ) . '</span>';
1107                 } elseif ( $file->isDeleted( File::DELETED_FILE ) ) {
1108                         if ( $local ) {
1109                                 $this->preventClickjacking();
1110                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
1111                                 # Make a link to review the image
1112                                 $url = Linker::linkKnown(
1113                                         $revdel,
1114                                         $lang->userTimeAndDate( $timestamp, $user ),
1115                                         array(),
1116                                         array(
1117                                                 'target' => $this->title->getPrefixedText(),
1118                                                 'file' => $img,
1119                                                 'token' => $user->getEditToken( $img )
1120                                         )
1121                                 );
1122                         } else {
1123                                 $url = $lang->userTimeAndDate( $timestamp, $user );
1124                         }
1125                         $row .= '<span class="history-deleted">' . $url . '</span>';
1126                 } else {
1127                         $url = $iscur ? $this->current->getUrl() : $this->current->getArchiveUrl( $img );
1128                         $row .= Xml::element( 'a', array( 'href' => $url ), $lang->userTimeAndDate( $timestamp, $user ) );
1129                 }
1130                 $row .= "</td>";
1131
1132                 // Thumbnail
1133                 if ( $this->showThumb ) {
1134                         $row .= '<td>' . $this->getThumbForLine( $file ) . '</td>';
1135                 }
1136
1137                 // Image dimensions + size
1138                 $row .= '<td>';
1139                 $row .= htmlspecialchars( $file->getDimensionsString() );
1140                 $row .= $this->msg( 'word-separator' )->plain();
1141                 $row .= '<span style="white-space: nowrap;">';
1142                 $row .= $this->msg( 'parentheses' )->rawParams( Linker::formatSize( $file->getSize() ) )->plain();
1143                 $row .= '</span>';
1144                 $row .= '</td>';
1145
1146                 // Uploading user
1147                 $row .= '<td>';
1148                 // Hide deleted usernames
1149                 if ( $file->isDeleted( File::DELETED_USER ) ) {
1150                         $row .= '<span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
1151                 } else {
1152                         if ( $local ) {
1153                                 $row .= Linker::userLink( $userId, $userText );
1154                                 $row .= $this->msg( 'word-separator' )->plain();
1155                                 $row .= '<span style="white-space: nowrap;">';
1156                                 $row .= Linker::userToolLinks( $userId, $userText );
1157                                 $row .= '</span>';
1158                         } else {
1159                                 $row .= htmlspecialchars( $userText );
1160                         }
1161                 }
1162                 $row .= '</td>';
1163
1164                 // Don't show deleted descriptions
1165                 if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
1166                         $row .= '<td><span class="history-deleted">' . $this->msg( 'rev-deleted-comment' )->escaped() . '</span></td>';
1167                 } else {
1168                         $row .= '<td dir="' . $wgContLang->getDir() . '">' . Linker::formatComment( $description, $this->title ) . '</td>';
1169                 }
1170
1171                 $rowClass = null;
1172                 wfRunHooks( 'ImagePageFileHistoryLine', array( $this, $file, &$row, &$rowClass ) );
1173                 $classAttr = $rowClass ? " class='$rowClass'" : '';
1174
1175                 return "<tr{$classAttr}>{$row}</tr>\n";
1176         }
1177
1178         /**
1179          * @param $file File
1180          * @return string
1181          */
1182         protected function getThumbForLine( $file ) {
1183                 $lang = $this->getLanguage();
1184                 $user = $this->getUser();
1185                 if ( $file->allowInlineDisplay() && $file->userCan( File::DELETED_FILE, $user )
1186                         && !$file->isDeleted( File::DELETED_FILE ) )
1187                 {
1188                         $params = array(
1189                                 'width' => '120',
1190                                 'height' => '120',
1191                         );
1192                         $timestamp = wfTimestamp( TS_MW, $file->getTimestamp() );
1193
1194                         $thumbnail = $file->transform( $params );
1195                         $options = array(
1196                                 'alt' => $this->msg( 'filehist-thumbtext',
1197                                         $lang->userTimeAndDate( $timestamp, $user ),
1198                                         $lang->userDate( $timestamp, $user ),
1199                                         $lang->userTime( $timestamp, $user ) )->text(),
1200                                 'file-link' => true,
1201                         );
1202
1203                         if ( !$thumbnail ) {
1204                                 return $this->msg( 'filehist-nothumb' )->escaped();
1205                         }
1206
1207                         return $thumbnail->toHtml( $options );
1208                 } else {
1209                         return $this->msg( 'filehist-nothumb' )->escaped();
1210                 }
1211         }
1212
1213         /**
1214          * @param $enable bool
1215          */
1216         protected function preventClickjacking( $enable = true ) {
1217                 $this->preventClickjacking = $enable;
1218         }
1219
1220         /**
1221          * @return bool
1222          */
1223         public function getPreventClickjacking() {
1224                 return $this->preventClickjacking;
1225         }
1226 }
1227
1228 class ImageHistoryPseudoPager extends ReverseChronologicalPager {
1229         protected $preventClickjacking = false;
1230
1231         /**
1232          * @var File
1233          */
1234         protected $mImg;
1235
1236         /**
1237          * @var Title
1238          */
1239         protected $mTitle;
1240
1241         /**
1242          * @param ImagePage $imagePage
1243          */
1244         function __construct( $imagePage ) {
1245                 parent::__construct( $imagePage->getContext() );
1246                 $this->mImagePage = $imagePage;
1247                 $this->mTitle = clone ( $imagePage->getTitle() );
1248                 $this->mTitle->setFragment( '#filehistory' );
1249                 $this->mImg = null;
1250                 $this->mHist = array();
1251                 $this->mRange = array( 0, 0 ); // display range
1252         }
1253
1254         /**
1255          * @return Title
1256          */
1257         function getTitle() {
1258                 return $this->mTitle;
1259         }
1260
1261         function getQueryInfo() {
1262                 return false;
1263         }
1264
1265         /**
1266          * @return string
1267          */
1268         function getIndexField() {
1269                 return '';
1270         }
1271
1272         /**
1273          * @param $row object
1274          * @return string
1275          */
1276         function formatRow( $row ) {
1277                 return '';
1278         }
1279
1280         /**
1281          * @return string
1282          */
1283         function getBody() {
1284                 $s = '';
1285                 $this->doQuery();
1286                 if ( count( $this->mHist ) ) {
1287                         $list = new ImageHistoryList( $this->mImagePage );
1288                         # Generate prev/next links
1289                         $navLink = $this->getNavigationBar();
1290                         $s = $list->beginImageHistoryList( $navLink );
1291                         // Skip rows there just for paging links
1292                         for ( $i = $this->mRange[0]; $i <= $this->mRange[1]; $i++ ) {
1293                                 $file = $this->mHist[$i];
1294                                 $s .= $list->imageHistoryLine( !$file->isOld(), $file );
1295                         }
1296                         $s .= $list->endImageHistoryList( $navLink );
1297
1298                         if ( $list->getPreventClickjacking() ) {
1299                                 $this->preventClickjacking();
1300                         }
1301                 }
1302                 return $s;
1303         }
1304
1305         function doQuery() {
1306                 if ( $this->mQueryDone ) {
1307                         return;
1308                 }
1309                 $this->mImg = $this->mImagePage->getFile(); // ensure loading
1310                 if ( !$this->mImg->exists() ) {
1311                         return;
1312                 }
1313                 $queryLimit = $this->mLimit + 1; // limit plus extra row
1314                 if ( $this->mIsBackwards ) {
1315                         // Fetch the file history
1316                         $this->mHist = $this->mImg->getHistory( $queryLimit, null, $this->mOffset, false );
1317                         // The current rev may not meet the offset/limit
1318                         $numRows = count( $this->mHist );
1319                         if ( $numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset ) {
1320                                 $this->mHist = array_merge( array( $this->mImg ), $this->mHist );
1321                         }
1322                 } else {
1323                         // The current rev may not meet the offset
1324                         if ( !$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset ) {
1325                                 $this->mHist[] = $this->mImg;
1326                         }
1327                         // Old image versions (fetch extra row for nav links)
1328                         $oiLimit = count( $this->mHist ) ? $this->mLimit : $this->mLimit + 1;
1329                         // Fetch the file history
1330                         $this->mHist = array_merge( $this->mHist,
1331                                 $this->mImg->getHistory( $oiLimit, $this->mOffset, null, false ) );
1332                 }
1333                 $numRows = count( $this->mHist ); // Total number of query results
1334                 if ( $numRows ) {
1335                         # Index value of top item in the list
1336                         $firstIndex = $this->mIsBackwards ?
1337                                 $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
1338                         # Discard the extra result row if there is one
1339                         if ( $numRows > $this->mLimit && $numRows > 1 ) {
1340                                 if ( $this->mIsBackwards ) {
1341                                         # Index value of item past the index
1342                                         $this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
1343                                         # Index value of bottom item in the list
1344                                         $lastIndex = $this->mHist[1]->getTimestamp();
1345                                         # Display range
1346                                         $this->mRange = array( 1, $numRows - 1 );
1347                                 } else {
1348                                         # Index value of item past the index
1349                                         $this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
1350                                         # Index value of bottom item in the list
1351                                         $lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
1352                                         # Display range
1353                                         $this->mRange = array( 0, $numRows - 2 );
1354                                 }
1355                         } else {
1356                                 # Setting indexes to an empty string means that they will be
1357                                 # omitted if they would otherwise appear in URLs. It just so
1358                                 # happens that this  is the right thing to do in the standard
1359                                 # UI, in all the relevant cases.
1360                                 $this->mPastTheEndIndex = '';
1361                                 # Index value of bottom item in the list
1362                                 $lastIndex = $this->mIsBackwards ?
1363                                         $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
1364                                 # Display range
1365                                 $this->mRange = array( 0, $numRows - 1 );
1366                         }
1367                 } else {
1368                         $firstIndex = '';
1369                         $lastIndex = '';
1370                         $this->mPastTheEndIndex = '';
1371                 }
1372                 if ( $this->mIsBackwards ) {
1373                         $this->mIsFirst = ( $numRows < $queryLimit );
1374                         $this->mIsLast = ( $this->mOffset == '' );
1375                         $this->mLastShown = $firstIndex;
1376                         $this->mFirstShown = $lastIndex;
1377                 } else {
1378                         $this->mIsFirst = ( $this->mOffset == '' );
1379                         $this->mIsLast = ( $numRows < $queryLimit );
1380                         $this->mLastShown = $lastIndex;
1381                         $this->mFirstShown = $firstIndex;
1382                 }
1383                 $this->mQueryDone = true;
1384         }
1385
1386         /**
1387          * @param $enable bool
1388          */
1389         protected function preventClickjacking( $enable = true ) {
1390                 $this->preventClickjacking = $enable;
1391         }
1392
1393         /**
1394          * @return bool
1395          */
1396         public function getPreventClickjacking() {
1397                 return $this->preventClickjacking;
1398         }
1399
1400 }