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