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